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/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tk_base/tkscale.c,v 1.1.1.1 2001/06/13 05:07:45 dtashley Exp $ */ |
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/* |
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* tkScale.c -- |
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* |
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* This module implements a scale widgets for the Tk toolkit. |
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* A scale displays a slider that can be adjusted to change a |
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* value; it also displays numeric labels and a textual label, |
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* if desired. |
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* |
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* The modifications to use floating-point values are based on |
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* an implementation by Paul Mackerras. The -variable option |
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* is due to Henning Schulzrinne. All of these are used with |
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* permission. |
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* |
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* Copyright (c) 1990-1994 The Regents of the University of California. |
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* Copyright (c) 1994-1997 Sun Microsystems, Inc. |
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* Copyright (c) 1998-2000 by Scriptics Corporation. |
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* |
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* See the file "license.terms" for information on usage and redistribution |
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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* |
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* RCS: @(#) $Id: tkscale.c,v 1.1.1.1 2001/06/13 05:07:45 dtashley Exp $ |
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*/ |
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#include "tkPort.h" |
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#include "default.h" |
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#include "tkInt.h" |
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#include "tclMath.h" |
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#include "tkScale.h" |
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/* |
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* The following table defines the legal values for the -orient option. |
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* It is used together with the "enum orient" declaration in tkScale.h. |
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*/ |
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static char *orientStrings[] = { |
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"horizontal", "vertical", (char *) NULL |
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}; |
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/* |
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* The following table defines the legal values for the -state option. |
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* It is used together with the "enum state" declaration in tkScale.h. |
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*/ |
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static char *stateStrings[] = { |
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"active", "disabled", "normal", (char *) NULL |
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}; |
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static Tk_OptionSpec optionSpecs[] = { |
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{TK_OPTION_BORDER, "-activebackground", "activeBackground", "Foreground", |
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DEF_SCALE_ACTIVE_BG_COLOR, -1, Tk_Offset(TkScale, activeBorder), |
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0, (ClientData) DEF_SCALE_ACTIVE_BG_MONO, 0}, |
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{TK_OPTION_BORDER, "-background", "background", "Background", |
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DEF_SCALE_BG_COLOR, -1, Tk_Offset(TkScale, bgBorder), |
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0, (ClientData) DEF_SCALE_BG_MONO, 0}, |
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{TK_OPTION_DOUBLE, "-bigincrement", "bigIncrement", "BigIncrement", |
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DEF_SCALE_BIG_INCREMENT, -1, Tk_Offset(TkScale, bigIncrement), |
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0, 0, 0}, |
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{TK_OPTION_SYNONYM, "-bd", (char *) NULL, (char *) NULL, |
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(char *) NULL, 0, -1, 0, (ClientData) "-borderwidth", 0}, |
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{TK_OPTION_SYNONYM, "-bg", (char *) NULL, (char *) NULL, |
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(char *) NULL, 0, -1, 0, (ClientData) "-background", 0}, |
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{TK_OPTION_PIXELS, "-borderwidth", "borderWidth", "BorderWidth", |
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DEF_SCALE_BORDER_WIDTH, -1, Tk_Offset(TkScale, borderWidth), |
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0, 0, 0}, |
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{TK_OPTION_STRING, "-command", "command", "Command", |
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DEF_SCALE_COMMAND, -1, Tk_Offset(TkScale, command), |
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TK_OPTION_NULL_OK, 0, 0}, |
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{TK_OPTION_CURSOR, "-cursor", "cursor", "Cursor", |
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DEF_SCALE_CURSOR, -1, Tk_Offset(TkScale, cursor), |
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TK_OPTION_NULL_OK, 0, 0}, |
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{TK_OPTION_INT, "-digits", "digits", "Digits", |
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DEF_SCALE_DIGITS, -1, Tk_Offset(TkScale, digits), |
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0, 0, 0}, |
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{TK_OPTION_SYNONYM, "-fg", "foreground", (char *) NULL, |
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(char *) NULL, 0, -1, 0, (ClientData) "-foreground", 0}, |
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{TK_OPTION_FONT, "-font", "font", "Font", |
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DEF_SCALE_FONT, -1, Tk_Offset(TkScale, tkfont), 0, 0, 0}, |
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{TK_OPTION_COLOR, "-foreground", "foreground", "Foreground", |
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DEF_SCALE_FG_COLOR, -1, Tk_Offset(TkScale, textColorPtr), 0, |
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(ClientData) DEF_SCALE_FG_MONO, 0}, |
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{TK_OPTION_DOUBLE, "-from", "from", "From", DEF_SCALE_FROM, -1, |
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Tk_Offset(TkScale, fromValue), 0, 0, 0}, |
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{TK_OPTION_BORDER, "-highlightbackground", "highlightBackground", |
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"HighlightBackground", DEF_SCALE_HIGHLIGHT_BG_COLOR, |
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-1, Tk_Offset(TkScale, highlightBorder), |
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0, (ClientData) DEF_SCALE_HIGHLIGHT_BG_MONO, 0}, |
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{TK_OPTION_COLOR, "-highlightcolor", "highlightColor", "HighlightColor", |
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DEF_SCALE_HIGHLIGHT, -1, Tk_Offset(TkScale, highlightColorPtr), |
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0, 0, 0}, |
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{TK_OPTION_PIXELS, "-highlightthickness", "highlightThickness", |
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"HighlightThickness", DEF_SCALE_HIGHLIGHT_WIDTH, -1, |
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Tk_Offset(TkScale, highlightWidth), 0, 0, 0}, |
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{TK_OPTION_STRING, "-label", "label", "Label", |
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DEF_SCALE_LABEL, -1, Tk_Offset(TkScale, label), |
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TK_OPTION_NULL_OK, 0, 0}, |
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{TK_OPTION_PIXELS, "-length", "length", "Length", |
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DEF_SCALE_LENGTH, -1, Tk_Offset(TkScale, length), 0, 0, 0}, |
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{TK_OPTION_STRING_TABLE, "-orient", "orient", "Orient", |
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DEF_SCALE_ORIENT, -1, Tk_Offset(TkScale, orient), |
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0, (ClientData) orientStrings, 0}, |
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{TK_OPTION_RELIEF, "-relief", "relief", "Relief", |
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DEF_SCALE_RELIEF, -1, Tk_Offset(TkScale, relief), 0, 0, 0}, |
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{TK_OPTION_INT, "-repeatdelay", "repeatDelay", "RepeatDelay", |
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DEF_SCALE_REPEAT_DELAY, -1, Tk_Offset(TkScale, repeatDelay), |
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0, 0, 0}, |
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{TK_OPTION_INT, "-repeatinterval", "repeatInterval", "RepeatInterval", |
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DEF_SCALE_REPEAT_INTERVAL, -1, Tk_Offset(TkScale, repeatInterval), |
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0, 0, 0}, |
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{TK_OPTION_DOUBLE, "-resolution", "resolution", "Resolution", |
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DEF_SCALE_RESOLUTION, -1, Tk_Offset(TkScale, resolution), |
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0, 0, 0}, |
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{TK_OPTION_BOOLEAN, "-showvalue", "showValue", "ShowValue", |
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DEF_SCALE_SHOW_VALUE, -1, Tk_Offset(TkScale, showValue), |
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0, 0, 0}, |
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{TK_OPTION_PIXELS, "-sliderlength", "sliderLength", "SliderLength", |
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DEF_SCALE_SLIDER_LENGTH, -1, Tk_Offset(TkScale, sliderLength), |
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0, 0, 0}, |
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{TK_OPTION_RELIEF, "-sliderrelief", "sliderRelief", "SliderRelief", |
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DEF_SCALE_SLIDER_RELIEF, -1, Tk_Offset(TkScale, sliderRelief), |
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0, 0, 0}, |
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{TK_OPTION_STRING_TABLE, "-state", "state", "State", |
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DEF_SCALE_STATE, -1, Tk_Offset(TkScale, state), |
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0, (ClientData) stateStrings, 0}, |
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{TK_OPTION_STRING, "-takefocus", "takeFocus", "TakeFocus", |
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DEF_SCALE_TAKE_FOCUS, Tk_Offset(TkScale, takeFocusPtr), -1, |
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TK_OPTION_NULL_OK, 0, 0}, |
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{TK_OPTION_DOUBLE, "-tickinterval", "tickInterval", "TickInterval", |
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DEF_SCALE_TICK_INTERVAL, -1, Tk_Offset(TkScale, tickInterval), |
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0, 0, 0}, |
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{TK_OPTION_DOUBLE, "-to", "to", "To", |
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DEF_SCALE_TO, -1, Tk_Offset(TkScale, toValue), 0, 0, 0}, |
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{TK_OPTION_COLOR, "-troughcolor", "troughColor", "Background", |
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DEF_SCALE_TROUGH_COLOR, -1, Tk_Offset(TkScale, troughColorPtr), |
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0, (ClientData) DEF_SCALE_TROUGH_MONO, 0}, |
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{TK_OPTION_STRING, "-variable", "variable", "Variable", |
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DEF_SCALE_VARIABLE, Tk_Offset(TkScale, varNamePtr), -1, |
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TK_OPTION_NULL_OK, 0, 0}, |
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{TK_OPTION_PIXELS, "-width", "width", "Width", |
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DEF_SCALE_WIDTH, -1, Tk_Offset(TkScale, width), 0, 0, 0}, |
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{TK_OPTION_END, (char *) NULL, (char *) NULL, (char *) NULL, |
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(char *) NULL, 0, -1, 0, 0, 0} |
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}; |
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/* |
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* The following tables define the scale widget commands and map the |
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* indexes into the string tables into a single enumerated type used |
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* to dispatch the scale widget command. |
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*/ |
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static char *commandNames[] = { |
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"cget", "configure", "coords", "get", "identify", "set", (char *) NULL |
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}; |
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enum command { |
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COMMAND_CGET, COMMAND_CONFIGURE, COMMAND_COORDS, COMMAND_GET, |
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COMMAND_IDENTIFY, COMMAND_SET |
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}; |
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/* |
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* Forward declarations for procedures defined later in this file: |
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*/ |
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static void ComputeFormat _ANSI_ARGS_((TkScale *scalePtr)); |
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static void ComputeScaleGeometry _ANSI_ARGS_((TkScale *scalePtr)); |
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static int ConfigureScale _ANSI_ARGS_((Tcl_Interp *interp, |
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TkScale *scalePtr, int objc, |
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Tcl_Obj *CONST objv[])); |
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static void DestroyScale _ANSI_ARGS_((char *memPtr)); |
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static void ScaleCmdDeletedProc _ANSI_ARGS_(( |
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ClientData clientData)); |
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static void ScaleEventProc _ANSI_ARGS_((ClientData clientData, |
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XEvent *eventPtr)); |
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static char * ScaleVarProc _ANSI_ARGS_((ClientData clientData, |
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Tcl_Interp *interp, char *name1, char *name2, |
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int flags)); |
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static int ScaleWidgetObjCmd _ANSI_ARGS_((ClientData clientData, |
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Tcl_Interp *interp, int objc, |
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Tcl_Obj *CONST objv[])); |
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static void ScaleWorldChanged _ANSI_ARGS_(( |
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ClientData instanceData)); |
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static void ScaleSetVariable _ANSI_ARGS_((TkScale *scalePtr)); |
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/* |
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* The structure below defines scale class behavior by means of procedures |
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* that can be invoked from generic window code. |
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*/ |
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static TkClassProcs scaleClass = { |
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NULL, /* createProc. */ |
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ScaleWorldChanged, /* geometryProc. */ |
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NULL /* modalProc. */ |
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}; |
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/* |
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*-------------------------------------------------------------- |
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* |
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* Tk_ScaleObjCmd -- |
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* |
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* This procedure is invoked to process the "scale" Tcl |
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* command. See the user documentation for details on what |
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* it does. |
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* |
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* Results: |
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* A standard Tcl result. |
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* |
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* Side effects: |
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* See the user documentation. |
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* |
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*-------------------------------------------------------------- |
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*/ |
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int |
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Tk_ScaleObjCmd(clientData, interp, objc, objv) |
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ClientData clientData; /* Either NULL or pointer to option table. */ |
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Tcl_Interp *interp; /* Current interpreter. */ |
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int objc; /* Number of arguments. */ |
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Tcl_Obj *CONST objv[]; /* Argument values. */ |
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{ |
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register TkScale *scalePtr; |
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Tk_OptionTable optionTable; |
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Tk_Window tkwin; |
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optionTable = (Tk_OptionTable) clientData; |
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if (optionTable == NULL) { |
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Tcl_CmdInfo info; |
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char *name; |
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/* |
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* We haven't created the option table for this widget class |
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* yet. Do it now and save the table as the clientData for |
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* the command, so we'll have access to it in future |
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* invocations of the command. |
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*/ |
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optionTable = Tk_CreateOptionTable(interp, optionSpecs); |
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name = Tcl_GetString(objv[0]); |
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Tcl_GetCommandInfo(interp, name, &info); |
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info.objClientData = (ClientData) optionTable; |
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Tcl_SetCommandInfo(interp, name, &info); |
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} |
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if (objc < 2) { |
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Tcl_WrongNumArgs(interp, 1, objv, "pathName ?options?"); |
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return TCL_ERROR; |
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} |
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tkwin = Tk_CreateWindowFromPath(interp, Tk_MainWindow(interp), |
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Tcl_GetString(objv[1]), (char *) NULL); |
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if (tkwin == NULL) { |
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return TCL_ERROR; |
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} |
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Tk_SetClass(tkwin, "Scale"); |
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scalePtr = TkpCreateScale(tkwin); |
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/* |
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* Initialize fields that won't be initialized by ConfigureScale, |
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* or which ConfigureScale expects to have reasonable values |
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* (e.g. resource pointers). |
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*/ |
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scalePtr->tkwin = tkwin; |
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scalePtr->display = Tk_Display(tkwin); |
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scalePtr->interp = interp; |
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scalePtr->widgetCmd = Tcl_CreateObjCommand(interp, |
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Tk_PathName(scalePtr->tkwin), ScaleWidgetObjCmd, |
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(ClientData) scalePtr, ScaleCmdDeletedProc); |
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scalePtr->optionTable = optionTable; |
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scalePtr->orient = ORIENT_VERTICAL; |
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scalePtr->width = 0; |
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scalePtr->length = 0; |
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scalePtr->value = 0.0; |
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scalePtr->varNamePtr = NULL; |
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scalePtr->fromValue = 0.0; |
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scalePtr->toValue = 0.0; |
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scalePtr->tickInterval = 0.0; |
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scalePtr->resolution = 1.0; |
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scalePtr->digits = 0; |
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scalePtr->bigIncrement = 0.0; |
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scalePtr->command = NULL; |
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scalePtr->repeatDelay = 0; |
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scalePtr->repeatInterval = 0; |
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scalePtr->label = NULL; |
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scalePtr->labelLength = 0; |
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scalePtr->state = STATE_NORMAL; |
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scalePtr->borderWidth = 0; |
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scalePtr->bgBorder = NULL; |
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scalePtr->activeBorder = NULL; |
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scalePtr->sliderRelief = TK_RELIEF_RAISED; |
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scalePtr->troughColorPtr = NULL; |
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scalePtr->troughGC = None; |
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scalePtr->copyGC = None; |
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scalePtr->tkfont = NULL; |
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scalePtr->textColorPtr = NULL; |
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scalePtr->textGC = None; |
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scalePtr->relief = TK_RELIEF_FLAT; |
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scalePtr->highlightWidth = 0; |
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scalePtr->highlightBorder = NULL; |
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scalePtr->highlightColorPtr = NULL; |
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scalePtr->inset = 0; |
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scalePtr->sliderLength = 0; |
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scalePtr->showValue = 0; |
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scalePtr->horizLabelY = 0; |
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scalePtr->horizValueY = 0; |
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scalePtr->horizTroughY = 0; |
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scalePtr->horizTickY = 0; |
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scalePtr->vertTickRightX = 0; |
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scalePtr->vertValueRightX = 0; |
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scalePtr->vertTroughX = 0; |
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scalePtr->vertLabelX = 0; |
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scalePtr->fontHeight = 0; |
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scalePtr->cursor = None; |
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scalePtr->takeFocusPtr = NULL; |
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scalePtr->flags = NEVER_SET; |
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TkSetClassProcs(scalePtr->tkwin, &scaleClass, (ClientData) scalePtr); |
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Tk_CreateEventHandler(scalePtr->tkwin, |
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ExposureMask|StructureNotifyMask|FocusChangeMask, |
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ScaleEventProc, (ClientData) scalePtr); |
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if ((Tk_InitOptions(interp, (char *) scalePtr, optionTable, tkwin) |
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!= TCL_OK) || |
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(ConfigureScale(interp, scalePtr, objc - 2, objv + 2) != TCL_OK)) { |
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Tk_DestroyWindow(scalePtr->tkwin); |
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return TCL_ERROR; |
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} |
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|
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Tcl_SetResult(interp, Tk_PathName(scalePtr->tkwin), TCL_STATIC); |
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return TCL_OK; |
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} |
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|
|
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/* |
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|
*-------------------------------------------------------------- |
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* |
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* ScaleWidgetObjCmd -- |
|
|
* |
|
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* This procedure is invoked to process the Tcl command |
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* that corresponds to a widget managed by this module. |
|
|
* See the user documentation for details on what it does. |
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|
* |
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* Results: |
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|
* A standard Tcl result. |
|
|
* |
|
|
* Side effects: |
|
|
* See the user documentation. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
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|
|
|
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static int |
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ScaleWidgetObjCmd(clientData, interp, objc, objv) |
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ClientData clientData; /* Information about scale |
|
|
* widget. */ |
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Tcl_Interp *interp; /* Current interpreter. */ |
|
|
int objc; /* Number of arguments. */ |
|
|
Tcl_Obj *CONST objv[]; /* Argument strings. */ |
|
|
{ |
|
|
TkScale *scalePtr = (TkScale *) clientData; |
|
|
Tcl_Obj *objPtr; |
|
|
int index, result; |
|
|
|
|
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if (objc < 2) { |
|
|
Tcl_WrongNumArgs(interp, 1, objv, "option ?arg arg ...?"); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
result = Tcl_GetIndexFromObj(interp, objv[1], commandNames, |
|
|
"option", 0, &index); |
|
|
if (result != TCL_OK) { |
|
|
return result; |
|
|
} |
|
|
Tcl_Preserve((ClientData) scalePtr); |
|
|
|
|
|
switch (index) { |
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|
case COMMAND_CGET: { |
|
|
if (objc != 3) { |
|
|
Tcl_WrongNumArgs(interp, 1, objv, "cget option"); |
|
|
goto error; |
|
|
} |
|
|
objPtr = Tk_GetOptionValue(interp, (char *) scalePtr, |
|
|
scalePtr->optionTable, objv[2], scalePtr->tkwin); |
|
|
if (objPtr == NULL) { |
|
|
goto error; |
|
|
} else { |
|
|
Tcl_SetObjResult(interp, objPtr); |
|
|
} |
|
|
break; |
|
|
} |
|
|
case COMMAND_CONFIGURE: { |
|
|
if (objc <= 3) { |
|
|
objPtr = Tk_GetOptionInfo(interp, (char *) scalePtr, |
|
|
scalePtr->optionTable, |
|
|
(objc == 3) ? objv[2] : (Tcl_Obj *) NULL, |
|
|
scalePtr->tkwin); |
|
|
if (objPtr == NULL) { |
|
|
goto error; |
|
|
} else { |
|
|
Tcl_SetObjResult(interp, objPtr); |
|
|
} |
|
|
} else { |
|
|
result = ConfigureScale(interp, scalePtr, objc-2, objv+2); |
|
|
} |
|
|
break; |
|
|
} |
|
|
case COMMAND_COORDS: { |
|
|
int x, y ; |
|
|
double value; |
|
|
char buf[TCL_INTEGER_SPACE * 2]; |
|
|
|
|
|
if ((objc != 2) && (objc != 3)) { |
|
|
Tcl_WrongNumArgs(interp, 1, objv, "coords ?value?"); |
|
|
goto error; |
|
|
} |
|
|
if (objc == 3) { |
|
|
if (Tcl_GetDoubleFromObj(interp, objv[2], &value) |
|
|
!= TCL_OK) { |
|
|
goto error; |
|
|
} |
|
|
} else { |
|
|
value = scalePtr->value; |
|
|
} |
|
|
if (scalePtr->orient == ORIENT_VERTICAL) { |
|
|
x = scalePtr->vertTroughX + scalePtr->width/2 |
|
|
+ scalePtr->borderWidth; |
|
|
y = TkScaleValueToPixel(scalePtr, value); |
|
|
} else { |
|
|
x = TkScaleValueToPixel(scalePtr, value); |
|
|
y = scalePtr->horizTroughY + scalePtr->width/2 |
|
|
+ scalePtr->borderWidth; |
|
|
} |
|
|
sprintf(buf, "%d %d", x, y); |
|
|
Tcl_SetResult(interp, buf, TCL_VOLATILE); |
|
|
break; |
|
|
} |
|
|
case COMMAND_GET: { |
|
|
double value; |
|
|
int x, y; |
|
|
char buf[TCL_DOUBLE_SPACE]; |
|
|
|
|
|
if ((objc != 2) && (objc != 4)) { |
|
|
Tcl_WrongNumArgs(interp, 1, objv, "get ?x y?"); |
|
|
goto error; |
|
|
} |
|
|
if (objc == 2) { |
|
|
value = scalePtr->value; |
|
|
} else { |
|
|
if ((Tcl_GetIntFromObj(interp, objv[2], &x) != TCL_OK) |
|
|
|| (Tcl_GetIntFromObj(interp, objv[3], &y) |
|
|
!= TCL_OK)) { |
|
|
goto error; |
|
|
} |
|
|
value = TkScalePixelToValue(scalePtr, x, y); |
|
|
} |
|
|
sprintf(buf, scalePtr->format, value); |
|
|
Tcl_SetResult(interp, buf, TCL_VOLATILE); |
|
|
break; |
|
|
} |
|
|
case COMMAND_IDENTIFY: { |
|
|
int x, y, thing; |
|
|
|
|
|
if (objc != 4) { |
|
|
Tcl_WrongNumArgs(interp, 1, objv, "identify x y"); |
|
|
goto error; |
|
|
} |
|
|
if ((Tcl_GetIntFromObj(interp, objv[2], &x) != TCL_OK) |
|
|
|| (Tcl_GetIntFromObj(interp, objv[3], &y) != TCL_OK)) { |
|
|
goto error; |
|
|
} |
|
|
thing = TkpScaleElement(scalePtr, x,y); |
|
|
switch (thing) { |
|
|
case TROUGH1: |
|
|
Tcl_SetResult(interp, "trough1", TCL_STATIC); |
|
|
break; |
|
|
case SLIDER: |
|
|
Tcl_SetResult(interp, "slider", TCL_STATIC); |
|
|
break; |
|
|
case TROUGH2: |
|
|
Tcl_SetResult(interp, "trough2", TCL_STATIC); |
|
|
break; |
|
|
} |
|
|
break; |
|
|
} |
|
|
case COMMAND_SET: { |
|
|
double value; |
|
|
|
|
|
if (objc != 3) { |
|
|
Tcl_WrongNumArgs(interp, 1, objv, "set value"); |
|
|
goto error; |
|
|
} |
|
|
if (Tcl_GetDoubleFromObj(interp, objv[2], &value) != TCL_OK) { |
|
|
goto error; |
|
|
} |
|
|
if (scalePtr->state != STATE_DISABLED) { |
|
|
TkScaleSetValue(scalePtr, value, 1, 1); |
|
|
} |
|
|
break; |
|
|
} |
|
|
} |
|
|
Tcl_Release((ClientData) scalePtr); |
|
|
return result; |
|
|
|
|
|
error: |
|
|
Tcl_Release((ClientData) scalePtr); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* DestroyScale -- |
|
|
* |
|
|
* This procedure is invoked by Tcl_EventuallyFree or Tcl_Release |
|
|
* to clean up the internal structure of a button at a safe time |
|
|
* (when no-one is using it anymore). |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* Everything associated with the scale is freed up. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
DestroyScale(memPtr) |
|
|
char *memPtr; /* Info about scale widget. */ |
|
|
{ |
|
|
register TkScale *scalePtr = (TkScale *) memPtr; |
|
|
|
|
|
scalePtr->flags |= SCALE_DELETED; |
|
|
|
|
|
Tcl_DeleteCommandFromToken(scalePtr->interp, scalePtr->widgetCmd); |
|
|
if (scalePtr->flags & REDRAW_PENDING) { |
|
|
Tcl_CancelIdleCall(TkpDisplayScale, (ClientData) scalePtr); |
|
|
} |
|
|
|
|
|
/* |
|
|
* Free up all the stuff that requires special handling, then |
|
|
* let Tk_FreeOptions handle all the standard option-related |
|
|
* stuff. |
|
|
*/ |
|
|
|
|
|
if (scalePtr->varNamePtr != NULL) { |
|
|
Tcl_UntraceVar(scalePtr->interp, Tcl_GetString(scalePtr->varNamePtr), |
|
|
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS, |
|
|
ScaleVarProc, (ClientData) scalePtr); |
|
|
} |
|
|
if (scalePtr->troughGC != None) { |
|
|
Tk_FreeGC(scalePtr->display, scalePtr->troughGC); |
|
|
} |
|
|
if (scalePtr->copyGC != None) { |
|
|
Tk_FreeGC(scalePtr->display, scalePtr->copyGC); |
|
|
} |
|
|
if (scalePtr->textGC != None) { |
|
|
Tk_FreeGC(scalePtr->display, scalePtr->textGC); |
|
|
} |
|
|
Tk_FreeConfigOptions((char *) scalePtr, scalePtr->optionTable, |
|
|
scalePtr->tkwin); |
|
|
scalePtr->tkwin = NULL; |
|
|
TkpDestroyScale(scalePtr); |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* ConfigureScale -- |
|
|
* |
|
|
* This procedure is called to process an argv/argc list, plus |
|
|
* the Tk option database, in order to configure (or |
|
|
* reconfigure) a scale widget. |
|
|
* |
|
|
* Results: |
|
|
* The return value is a standard Tcl result. If TCL_ERROR is |
|
|
* returned, then the interp's result contains an error message. |
|
|
* |
|
|
* Side effects: |
|
|
* Configuration information, such as colors, border width, |
|
|
* etc. get set for scalePtr; old resources get freed, |
|
|
* if there were any. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
ConfigureScale(interp, scalePtr, objc, objv) |
|
|
Tcl_Interp *interp; /* Used for error reporting. */ |
|
|
register TkScale *scalePtr; /* Information about widget; may or may |
|
|
* not already have values for some fields. */ |
|
|
int objc; /* Number of valid entries in objv. */ |
|
|
Tcl_Obj *CONST objv[]; /* Argument values. */ |
|
|
{ |
|
|
Tk_SavedOptions savedOptions; |
|
|
Tcl_Obj *errorResult = NULL; |
|
|
int error; |
|
|
double oldValue = scalePtr->value; |
|
|
|
|
|
/* |
|
|
* Eliminate any existing trace on a variable monitored by the scale. |
|
|
*/ |
|
|
|
|
|
if (scalePtr->varNamePtr != NULL) { |
|
|
Tcl_UntraceVar(interp, Tcl_GetString(scalePtr->varNamePtr), |
|
|
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS, |
|
|
ScaleVarProc, (ClientData) scalePtr); |
|
|
} |
|
|
|
|
|
for (error = 0; error <= 1; error++) { |
|
|
if (!error) { |
|
|
/* |
|
|
* First pass: set options to new values. |
|
|
*/ |
|
|
|
|
|
if (Tk_SetOptions(interp, (char *) scalePtr, |
|
|
scalePtr->optionTable, objc, objv, |
|
|
scalePtr->tkwin, &savedOptions, (int *) NULL) != TCL_OK) { |
|
|
continue; |
|
|
} |
|
|
} else { |
|
|
/* |
|
|
* Second pass: restore options to old values. |
|
|
*/ |
|
|
|
|
|
errorResult = Tcl_GetObjResult(interp); |
|
|
Tcl_IncrRefCount(errorResult); |
|
|
Tk_RestoreSavedOptions(&savedOptions); |
|
|
} |
|
|
|
|
|
/* |
|
|
* If the scale is tied to the value of a variable, then set |
|
|
* the scale's value from the value of the variable, if it exists |
|
|
* and it holds a valid double value. |
|
|
*/ |
|
|
|
|
|
if (scalePtr->varNamePtr != NULL) { |
|
|
double value; |
|
|
Tcl_Obj *valuePtr; |
|
|
|
|
|
valuePtr = Tcl_ObjGetVar2(interp, scalePtr->varNamePtr, NULL, |
|
|
TCL_GLOBAL_ONLY); |
|
|
if ((valuePtr != NULL) && |
|
|
(Tcl_GetDoubleFromObj(NULL, valuePtr, &value) == TCL_OK)) { |
|
|
scalePtr->value = TkRoundToResolution(scalePtr, value); |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Several options need special processing, such as parsing the |
|
|
* orientation and creating GCs. |
|
|
*/ |
|
|
|
|
|
scalePtr->fromValue = TkRoundToResolution(scalePtr, |
|
|
scalePtr->fromValue); |
|
|
scalePtr->toValue = TkRoundToResolution(scalePtr, scalePtr->toValue); |
|
|
scalePtr->tickInterval = TkRoundToResolution(scalePtr, |
|
|
scalePtr->tickInterval); |
|
|
|
|
|
/* |
|
|
* Make sure that the tick interval has the right sign so that |
|
|
* addition moves from fromValue to toValue. |
|
|
*/ |
|
|
|
|
|
if ((scalePtr->tickInterval < 0) |
|
|
^ ((scalePtr->toValue - scalePtr->fromValue) < 0)) { |
|
|
scalePtr->tickInterval = -scalePtr->tickInterval; |
|
|
} |
|
|
|
|
|
ComputeFormat(scalePtr); |
|
|
|
|
|
scalePtr->labelLength = scalePtr->label ? strlen(scalePtr->label) : 0; |
|
|
|
|
|
Tk_SetBackgroundFromBorder(scalePtr->tkwin, scalePtr->bgBorder); |
|
|
|
|
|
if (scalePtr->highlightWidth < 0) { |
|
|
scalePtr->highlightWidth = 0; |
|
|
} |
|
|
scalePtr->inset = scalePtr->highlightWidth + scalePtr->borderWidth; |
|
|
break; |
|
|
} |
|
|
if (!error) { |
|
|
Tk_FreeSavedOptions(&savedOptions); |
|
|
} |
|
|
|
|
|
/* |
|
|
* Set the scale value to itself; all this does is to make sure |
|
|
* that the scale's value is within the new acceptable range for |
|
|
* the scale. We don't set the var here because we need to make |
|
|
* special checks for possibly changed varNamePtr. |
|
|
*/ |
|
|
|
|
|
TkScaleSetValue(scalePtr, scalePtr->value, 0, 1); |
|
|
|
|
|
/* |
|
|
* Reestablish the variable trace, if it is needed. |
|
|
*/ |
|
|
|
|
|
if (scalePtr->varNamePtr != NULL) { |
|
|
Tcl_Obj *valuePtr; |
|
|
|
|
|
/* |
|
|
* Set the associated variable only when the new value differs |
|
|
* from the current value, or the variable doesn't yet exist |
|
|
*/ |
|
|
valuePtr = Tcl_ObjGetVar2(interp, scalePtr->varNamePtr, NULL, |
|
|
TCL_GLOBAL_ONLY); |
|
|
if ((valuePtr == NULL) || (scalePtr->value != oldValue) |
|
|
|| (Tcl_GetDoubleFromObj(NULL, valuePtr, &oldValue) != TCL_OK) |
|
|
|| (scalePtr->value != oldValue)) { |
|
|
ScaleSetVariable(scalePtr); |
|
|
} |
|
|
Tcl_TraceVar(interp, Tcl_GetString(scalePtr->varNamePtr), |
|
|
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS, |
|
|
ScaleVarProc, (ClientData) scalePtr); |
|
|
} |
|
|
|
|
|
ScaleWorldChanged((ClientData) scalePtr); |
|
|
if (error) { |
|
|
Tcl_SetObjResult(interp, errorResult); |
|
|
Tcl_DecrRefCount(errorResult); |
|
|
return TCL_ERROR; |
|
|
} else { |
|
|
return TCL_OK; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*--------------------------------------------------------------------------- |
|
|
* |
|
|
* ScaleWorldChanged -- |
|
|
* |
|
|
* This procedure is called when the world has changed in some |
|
|
* way and the widget needs to recompute all its graphics contexts |
|
|
* and determine its new geometry. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* Scale will be relayed out and redisplayed. |
|
|
* |
|
|
*--------------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
ScaleWorldChanged(instanceData) |
|
|
ClientData instanceData; /* Information about widget. */ |
|
|
{ |
|
|
XGCValues gcValues; |
|
|
GC gc; |
|
|
TkScale *scalePtr; |
|
|
|
|
|
scalePtr = (TkScale *) instanceData; |
|
|
|
|
|
gcValues.foreground = scalePtr->troughColorPtr->pixel; |
|
|
gc = Tk_GetGC(scalePtr->tkwin, GCForeground, &gcValues); |
|
|
if (scalePtr->troughGC != None) { |
|
|
Tk_FreeGC(scalePtr->display, scalePtr->troughGC); |
|
|
} |
|
|
scalePtr->troughGC = gc; |
|
|
|
|
|
gcValues.font = Tk_FontId(scalePtr->tkfont); |
|
|
gcValues.foreground = scalePtr->textColorPtr->pixel; |
|
|
gc = Tk_GetGC(scalePtr->tkwin, GCForeground | GCFont, &gcValues); |
|
|
if (scalePtr->textGC != None) { |
|
|
Tk_FreeGC(scalePtr->display, scalePtr->textGC); |
|
|
} |
|
|
scalePtr->textGC = gc; |
|
|
|
|
|
if (scalePtr->copyGC == None) { |
|
|
gcValues.graphics_exposures = False; |
|
|
scalePtr->copyGC = Tk_GetGC(scalePtr->tkwin, GCGraphicsExposures, |
|
|
&gcValues); |
|
|
} |
|
|
scalePtr->inset = scalePtr->highlightWidth + scalePtr->borderWidth; |
|
|
|
|
|
/* |
|
|
* Recompute display-related information, and let the geometry |
|
|
* manager know how much space is needed now. |
|
|
*/ |
|
|
|
|
|
ComputeScaleGeometry(scalePtr); |
|
|
|
|
|
TkEventuallyRedrawScale(scalePtr, REDRAW_ALL); |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* ComputeFormat -- |
|
|
* |
|
|
* This procedure is invoked to recompute the "format" field |
|
|
* of a scale's widget record, which determines how the value |
|
|
* of the scale is converted to a string. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* The format field of scalePtr is modified. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
ComputeFormat(scalePtr) |
|
|
TkScale *scalePtr; /* Information about scale widget. */ |
|
|
{ |
|
|
double maxValue, x; |
|
|
int mostSigDigit, numDigits, leastSigDigit, afterDecimal; |
|
|
int eDigits, fDigits; |
|
|
|
|
|
/* |
|
|
* Compute the displacement from the decimal of the most significant |
|
|
* digit required for any number in the scale's range. |
|
|
*/ |
|
|
|
|
|
maxValue = fabs(scalePtr->fromValue); |
|
|
x = fabs(scalePtr->toValue); |
|
|
if (x > maxValue) { |
|
|
maxValue = x; |
|
|
} |
|
|
if (maxValue == 0) { |
|
|
maxValue = 1; |
|
|
} |
|
|
mostSigDigit = (int) floor(log10(maxValue)); |
|
|
|
|
|
/* |
|
|
* If the number of significant digits wasn't specified explicitly, |
|
|
* compute it. It's the difference between the most significant |
|
|
* digit needed to represent any number on the scale and the |
|
|
* most significant digit of the smallest difference between |
|
|
* numbers on the scale. In other words, display enough digits so |
|
|
* that at least one digit will be different between any two adjacent |
|
|
* positions of the scale. |
|
|
*/ |
|
|
|
|
|
numDigits = scalePtr->digits; |
|
|
if (numDigits <= 0) { |
|
|
if (scalePtr->resolution > 0) { |
|
|
/* |
|
|
* A resolution was specified for the scale, so just use it. |
|
|
*/ |
|
|
|
|
|
leastSigDigit = (int) floor(log10(scalePtr->resolution)); |
|
|
} else { |
|
|
/* |
|
|
* No resolution was specified, so compute the difference |
|
|
* in value between adjacent pixels and use it for the least |
|
|
* significant digit. |
|
|
*/ |
|
|
|
|
|
x = fabs(scalePtr->fromValue - scalePtr->toValue); |
|
|
if (scalePtr->length > 0) { |
|
|
x /= scalePtr->length; |
|
|
} |
|
|
if (x > 0){ |
|
|
leastSigDigit = (int) floor(log10(x)); |
|
|
} else { |
|
|
leastSigDigit = 0; |
|
|
} |
|
|
} |
|
|
numDigits = mostSigDigit - leastSigDigit + 1; |
|
|
if (numDigits < 1) { |
|
|
numDigits = 1; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Compute the number of characters required using "e" format and |
|
|
* "f" format, and then choose whichever one takes fewer characters. |
|
|
*/ |
|
|
|
|
|
eDigits = numDigits + 4; |
|
|
if (numDigits > 1) { |
|
|
eDigits++; /* Decimal point. */ |
|
|
} |
|
|
afterDecimal = numDigits - mostSigDigit - 1; |
|
|
if (afterDecimal < 0) { |
|
|
afterDecimal = 0; |
|
|
} |
|
|
fDigits = (mostSigDigit >= 0) ? mostSigDigit + afterDecimal : afterDecimal; |
|
|
if (afterDecimal > 0) { |
|
|
fDigits++; /* Decimal point. */ |
|
|
} |
|
|
if (mostSigDigit < 0) { |
|
|
fDigits++; /* Zero to left of decimal point. */ |
|
|
} |
|
|
if (fDigits <= eDigits) { |
|
|
sprintf(scalePtr->format, "%%.%df", afterDecimal); |
|
|
} else { |
|
|
sprintf(scalePtr->format, "%%.%de", numDigits-1); |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* ComputeScaleGeometry -- |
|
|
* |
|
|
* This procedure is called to compute various geometrical |
|
|
* information for a scale, such as where various things get |
|
|
* displayed. It's called when the window is reconfigured. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* Display-related numbers get changed in *scalePtr. The |
|
|
* geometry manager gets told about the window's preferred size. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
ComputeScaleGeometry(scalePtr) |
|
|
register TkScale *scalePtr; /* Information about widget. */ |
|
|
{ |
|
|
char valueString[PRINT_CHARS]; |
|
|
int tmp, valuePixels, x, y, extraSpace; |
|
|
Tk_FontMetrics fm; |
|
|
|
|
|
Tk_GetFontMetrics(scalePtr->tkfont, &fm); |
|
|
scalePtr->fontHeight = fm.linespace + SPACING; |
|
|
|
|
|
/* |
|
|
* Horizontal scales are simpler than vertical ones because |
|
|
* all sizes are the same (the height of a line of text); |
|
|
* handle them first and then quit. |
|
|
*/ |
|
|
|
|
|
if (scalePtr->orient == ORIENT_HORIZONTAL) { |
|
|
y = scalePtr->inset; |
|
|
extraSpace = 0; |
|
|
if (scalePtr->labelLength != 0) { |
|
|
scalePtr->horizLabelY = y + SPACING; |
|
|
y += scalePtr->fontHeight; |
|
|
extraSpace = SPACING; |
|
|
} |
|
|
if (scalePtr->showValue) { |
|
|
scalePtr->horizValueY = y + SPACING; |
|
|
y += scalePtr->fontHeight; |
|
|
extraSpace = SPACING; |
|
|
} else { |
|
|
scalePtr->horizValueY = y; |
|
|
} |
|
|
y += extraSpace; |
|
|
scalePtr->horizTroughY = y; |
|
|
y += scalePtr->width + 2*scalePtr->borderWidth; |
|
|
if (scalePtr->tickInterval != 0) { |
|
|
scalePtr->horizTickY = y + SPACING; |
|
|
y += scalePtr->fontHeight + SPACING; |
|
|
} |
|
|
Tk_GeometryRequest(scalePtr->tkwin, |
|
|
scalePtr->length + 2*scalePtr->inset, y + scalePtr->inset); |
|
|
Tk_SetInternalBorder(scalePtr->tkwin, scalePtr->inset); |
|
|
return; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Vertical scale: compute the amount of space needed to display |
|
|
* the scales value by formatting strings for the two end points; |
|
|
* use whichever length is longer. |
|
|
*/ |
|
|
|
|
|
sprintf(valueString, scalePtr->format, scalePtr->fromValue); |
|
|
valuePixels = Tk_TextWidth(scalePtr->tkfont, valueString, -1); |
|
|
|
|
|
sprintf(valueString, scalePtr->format, scalePtr->toValue); |
|
|
tmp = Tk_TextWidth(scalePtr->tkfont, valueString, -1); |
|
|
if (valuePixels < tmp) { |
|
|
valuePixels = tmp; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Assign x-locations to the elements of the scale, working from |
|
|
* left to right. |
|
|
*/ |
|
|
|
|
|
x = scalePtr->inset; |
|
|
if ((scalePtr->tickInterval != 0) && (scalePtr->showValue)) { |
|
|
scalePtr->vertTickRightX = x + SPACING + valuePixels; |
|
|
scalePtr->vertValueRightX = scalePtr->vertTickRightX + valuePixels |
|
|
+ fm.ascent/2; |
|
|
x = scalePtr->vertValueRightX + SPACING; |
|
|
} else if (scalePtr->tickInterval != 0) { |
|
|
scalePtr->vertTickRightX = x + SPACING + valuePixels; |
|
|
scalePtr->vertValueRightX = scalePtr->vertTickRightX; |
|
|
x = scalePtr->vertTickRightX + SPACING; |
|
|
} else if (scalePtr->showValue) { |
|
|
scalePtr->vertTickRightX = x; |
|
|
scalePtr->vertValueRightX = x + SPACING + valuePixels; |
|
|
x = scalePtr->vertValueRightX + SPACING; |
|
|
} else { |
|
|
scalePtr->vertTickRightX = x; |
|
|
scalePtr->vertValueRightX = x; |
|
|
} |
|
|
scalePtr->vertTroughX = x; |
|
|
x += 2*scalePtr->borderWidth + scalePtr->width; |
|
|
if (scalePtr->labelLength == 0) { |
|
|
scalePtr->vertLabelX = 0; |
|
|
} else { |
|
|
scalePtr->vertLabelX = x + fm.ascent/2; |
|
|
x = scalePtr->vertLabelX + fm.ascent/2 |
|
|
+ Tk_TextWidth(scalePtr->tkfont, scalePtr->label, |
|
|
scalePtr->labelLength); |
|
|
} |
|
|
Tk_GeometryRequest(scalePtr->tkwin, x + scalePtr->inset, |
|
|
scalePtr->length + 2*scalePtr->inset); |
|
|
Tk_SetInternalBorder(scalePtr->tkwin, scalePtr->inset); |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* ScaleEventProc -- |
|
|
* |
|
|
* This procedure is invoked by the Tk dispatcher for various |
|
|
* events on scales. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* When the window gets deleted, internal structures get |
|
|
* cleaned up. When it gets exposed, it is redisplayed. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
ScaleEventProc(clientData, eventPtr) |
|
|
ClientData clientData; /* Information about window. */ |
|
|
XEvent *eventPtr; /* Information about event. */ |
|
|
{ |
|
|
TkScale *scalePtr = (TkScale *) clientData; |
|
|
|
|
|
if ((eventPtr->type == Expose) && (eventPtr->xexpose.count == 0)) { |
|
|
TkEventuallyRedrawScale(scalePtr, REDRAW_ALL); |
|
|
} else if (eventPtr->type == DestroyNotify) { |
|
|
DestroyScale((char *) clientData); |
|
|
} else if (eventPtr->type == ConfigureNotify) { |
|
|
ComputeScaleGeometry(scalePtr); |
|
|
TkEventuallyRedrawScale(scalePtr, REDRAW_ALL); |
|
|
} else if (eventPtr->type == FocusIn) { |
|
|
if (eventPtr->xfocus.detail != NotifyInferior) { |
|
|
scalePtr->flags |= GOT_FOCUS; |
|
|
if (scalePtr->highlightWidth > 0) { |
|
|
TkEventuallyRedrawScale(scalePtr, REDRAW_ALL); |
|
|
} |
|
|
} |
|
|
} else if (eventPtr->type == FocusOut) { |
|
|
if (eventPtr->xfocus.detail != NotifyInferior) { |
|
|
scalePtr->flags &= ~GOT_FOCUS; |
|
|
if (scalePtr->highlightWidth > 0) { |
|
|
TkEventuallyRedrawScale(scalePtr, REDRAW_ALL); |
|
|
} |
|
|
} |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* ScaleCmdDeletedProc -- |
|
|
* |
|
|
* This procedure is invoked when a widget command is deleted. If |
|
|
* the widget isn't already in the process of being destroyed, |
|
|
* this command destroys it. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* The widget is destroyed. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
ScaleCmdDeletedProc(clientData) |
|
|
ClientData clientData; /* Pointer to widget record for widget. */ |
|
|
{ |
|
|
TkScale *scalePtr = (TkScale *) clientData; |
|
|
Tk_Window tkwin = scalePtr->tkwin; |
|
|
|
|
|
/* |
|
|
* This procedure could be invoked either because the window was |
|
|
* destroyed and the command was then deleted (in which case tkwin |
|
|
* is NULL) or because the command was deleted, and then this procedure |
|
|
* destroys the widget. |
|
|
*/ |
|
|
|
|
|
if (!(scalePtr->flags & SCALE_DELETED)) { |
|
|
scalePtr->flags |= SCALE_DELETED; |
|
|
Tk_DestroyWindow(tkwin); |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* TkEventuallyRedrawScale -- |
|
|
* |
|
|
* Arrange for part or all of a scale widget to redrawn at |
|
|
* the next convenient time in the future. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* If "what" is REDRAW_SLIDER then just the slider and the |
|
|
* value readout will be redrawn; if "what" is REDRAW_ALL |
|
|
* then the entire widget will be redrawn. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
void |
|
|
TkEventuallyRedrawScale(scalePtr, what) |
|
|
register TkScale *scalePtr; /* Information about widget. */ |
|
|
int what; /* What to redraw: REDRAW_SLIDER |
|
|
* or REDRAW_ALL. */ |
|
|
{ |
|
|
if ((what == 0) || (scalePtr->tkwin == NULL) |
|
|
|| !Tk_IsMapped(scalePtr->tkwin)) { |
|
|
return; |
|
|
} |
|
|
if (!(scalePtr->flags & REDRAW_PENDING)) { |
|
|
scalePtr->flags |= REDRAW_PENDING; |
|
|
Tcl_DoWhenIdle(TkpDisplayScale, (ClientData) scalePtr); |
|
|
} |
|
|
scalePtr->flags |= what; |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* TkRoundToResolution -- |
|
|
* |
|
|
* Round a given floating-point value to the nearest multiple |
|
|
* of the scale's resolution. |
|
|
* |
|
|
* Results: |
|
|
* The return value is the rounded result. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
double |
|
|
TkRoundToResolution(scalePtr, value) |
|
|
TkScale *scalePtr; /* Information about scale widget. */ |
|
|
double value; /* Value to round. */ |
|
|
{ |
|
|
double rem, new, tick; |
|
|
|
|
|
if (scalePtr->resolution <= 0) { |
|
|
return value; |
|
|
} |
|
|
tick = floor(value/scalePtr->resolution); |
|
|
new = scalePtr->resolution * tick; |
|
|
rem = value - new; |
|
|
if (rem < 0) { |
|
|
if (rem <= -scalePtr->resolution/2) { |
|
|
new = (tick - 1.0) * scalePtr->resolution; |
|
|
} |
|
|
} else { |
|
|
if (rem >= scalePtr->resolution/2) { |
|
|
new = (tick + 1.0) * scalePtr->resolution; |
|
|
} |
|
|
} |
|
|
return new; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* ScaleVarProc -- |
|
|
* |
|
|
* This procedure is invoked by Tcl whenever someone modifies a |
|
|
* variable associated with a scale widget. |
|
|
* |
|
|
* Results: |
|
|
* NULL is always returned. |
|
|
* |
|
|
* Side effects: |
|
|
* The value displayed in the scale will change to match the |
|
|
* variable's new value. If the variable has a bogus value then |
|
|
* it is reset to the value of the scale. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
/* ARGSUSED */ |
|
|
static char * |
|
|
ScaleVarProc(clientData, interp, name1, name2, flags) |
|
|
ClientData clientData; /* Information about button. */ |
|
|
Tcl_Interp *interp; /* Interpreter containing variable. */ |
|
|
char *name1; /* Name of variable. */ |
|
|
char *name2; /* Second part of variable name. */ |
|
|
int flags; /* Information about what happened. */ |
|
|
{ |
|
|
register TkScale *scalePtr = (TkScale *) clientData; |
|
|
char *resultStr; |
|
|
double value; |
|
|
Tcl_Obj *valuePtr; |
|
|
int result; |
|
|
|
|
|
/* |
|
|
* If the variable is unset, then immediately recreate it unless |
|
|
* the whole interpreter is going away. |
|
|
*/ |
|
|
|
|
|
if (flags & TCL_TRACE_UNSETS) { |
|
|
if ((flags & TCL_TRACE_DESTROYED) && !(flags & TCL_INTERP_DESTROYED)) { |
|
|
Tcl_TraceVar(interp, Tcl_GetString(scalePtr->varNamePtr), |
|
|
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS, |
|
|
ScaleVarProc, clientData); |
|
|
scalePtr->flags |= NEVER_SET; |
|
|
TkScaleSetValue(scalePtr, scalePtr->value, 1, 0); |
|
|
} |
|
|
return (char *) NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
* If we came here because we updated the variable (in TkScaleSetValue), |
|
|
* then ignore the trace. Otherwise update the scale with the value |
|
|
* of the variable. |
|
|
*/ |
|
|
|
|
|
if (scalePtr->flags & SETTING_VAR) { |
|
|
return (char *) NULL; |
|
|
} |
|
|
resultStr = NULL; |
|
|
valuePtr = Tcl_ObjGetVar2(interp, scalePtr->varNamePtr, NULL, |
|
|
TCL_GLOBAL_ONLY); |
|
|
result = Tcl_GetDoubleFromObj(interp, valuePtr, &value); |
|
|
if (result != TCL_OK) { |
|
|
resultStr = "can't assign non-numeric value to scale variable"; |
|
|
ScaleSetVariable(scalePtr); |
|
|
} else { |
|
|
scalePtr->value = TkRoundToResolution(scalePtr, value); |
|
|
|
|
|
/* |
|
|
* This code is a bit tricky because it sets the scale's value before |
|
|
* calling TkScaleSetValue. This way, TkScaleSetValue won't bother |
|
|
* to set the variable again or to invoke the -command. However, it |
|
|
* also won't redisplay the scale, so we have to ask for that |
|
|
* explicitly. |
|
|
*/ |
|
|
|
|
|
TkScaleSetValue(scalePtr, scalePtr->value, 1, 0); |
|
|
} |
|
|
TkEventuallyRedrawScale(scalePtr, REDRAW_SLIDER); |
|
|
|
|
|
return resultStr; |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* TkScaleSetValue -- |
|
|
* |
|
|
* This procedure changes the value of a scale and invokes |
|
|
* a Tcl command to reflect the current position of a scale |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* A Tcl command is invoked, and an additional error-processing |
|
|
* command may also be invoked. The scale's slider is redrawn. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
void |
|
|
TkScaleSetValue(scalePtr, value, setVar, invokeCommand) |
|
|
register TkScale *scalePtr; /* Info about widget. */ |
|
|
double value; /* New value for scale. Gets adjusted |
|
|
* if it's off the scale. */ |
|
|
int setVar; /* Non-zero means reflect new value through |
|
|
* to associated variable, if any. */ |
|
|
int invokeCommand; /* Non-zero means invoked -command option |
|
|
* to notify of new value, 0 means don't. */ |
|
|
{ |
|
|
value = TkRoundToResolution(scalePtr, value); |
|
|
if ((value < scalePtr->fromValue) |
|
|
^ (scalePtr->toValue < scalePtr->fromValue)) { |
|
|
value = scalePtr->fromValue; |
|
|
} |
|
|
if ((value > scalePtr->toValue) |
|
|
^ (scalePtr->toValue < scalePtr->fromValue)) { |
|
|
value = scalePtr->toValue; |
|
|
} |
|
|
if (scalePtr->flags & NEVER_SET) { |
|
|
scalePtr->flags &= ~NEVER_SET; |
|
|
} else if (scalePtr->value == value) { |
|
|
return; |
|
|
} |
|
|
scalePtr->value = value; |
|
|
if (invokeCommand) { |
|
|
scalePtr->flags |= INVOKE_COMMAND; |
|
|
} |
|
|
TkEventuallyRedrawScale(scalePtr, REDRAW_SLIDER); |
|
|
|
|
|
if (setVar && scalePtr->varNamePtr) { |
|
|
ScaleSetVariable(scalePtr); |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* ScaleSetVariable -- |
|
|
* |
|
|
* This procedure sets the variable associated with a scale, if any. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* Other write traces on the variable will trigger. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
ScaleSetVariable(scalePtr) |
|
|
register TkScale *scalePtr; /* Info about widget. */ |
|
|
{ |
|
|
if (scalePtr->varNamePtr != NULL) { |
|
|
char string[PRINT_CHARS]; |
|
|
sprintf(string, scalePtr->format, scalePtr->value); |
|
|
scalePtr->flags |= SETTING_VAR; |
|
|
Tcl_ObjSetVar2(scalePtr->interp, scalePtr->varNamePtr, NULL, |
|
|
Tcl_NewStringObj(string, -1), TCL_GLOBAL_ONLY); |
|
|
scalePtr->flags &= ~SETTING_VAR; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TkScalePixelToValue -- |
|
|
* |
|
|
* Given a pixel within a scale window, return the scale |
|
|
* reading corresponding to that pixel. |
|
|
* |
|
|
* Results: |
|
|
* A double-precision scale reading. If the value is outside |
|
|
* the legal range for the scale then it's rounded to the nearest |
|
|
* end of the scale. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
double |
|
|
TkScalePixelToValue(scalePtr, x, y) |
|
|
register TkScale *scalePtr; /* Information about widget. */ |
|
|
int x, y; /* Coordinates of point within |
|
|
* window. */ |
|
|
{ |
|
|
double value, pixelRange; |
|
|
|
|
|
if (scalePtr->orient == ORIENT_VERTICAL) { |
|
|
pixelRange = Tk_Height(scalePtr->tkwin) - scalePtr->sliderLength |
|
|
- 2*scalePtr->inset - 2*scalePtr->borderWidth; |
|
|
value = y; |
|
|
} else { |
|
|
pixelRange = Tk_Width(scalePtr->tkwin) - scalePtr->sliderLength |
|
|
- 2*scalePtr->inset - 2*scalePtr->borderWidth; |
|
|
value = x; |
|
|
} |
|
|
|
|
|
if (pixelRange <= 0) { |
|
|
/* |
|
|
* Not enough room for the slider to actually slide: just return |
|
|
* the scale's current value. |
|
|
*/ |
|
|
|
|
|
return scalePtr->value; |
|
|
} |
|
|
value -= scalePtr->sliderLength/2 + scalePtr->inset |
|
|
+ scalePtr->borderWidth; |
|
|
value /= pixelRange; |
|
|
if (value < 0) { |
|
|
value = 0; |
|
|
} |
|
|
if (value > 1) { |
|
|
value = 1; |
|
|
} |
|
|
value = scalePtr->fromValue + |
|
|
value * (scalePtr->toValue - scalePtr->fromValue); |
|
|
return TkRoundToResolution(scalePtr, value); |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TkScaleValueToPixel -- |
|
|
* |
|
|
* Given a reading of the scale, return the x-coordinate or |
|
|
* y-coordinate corresponding to that reading, depending on |
|
|
* whether the scale is vertical or horizontal, respectively. |
|
|
* |
|
|
* Results: |
|
|
* An integer value giving the pixel location corresponding |
|
|
* to reading. The value is restricted to lie within the |
|
|
* defined range for the scale. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
int |
|
|
TkScaleValueToPixel(scalePtr, value) |
|
|
register TkScale *scalePtr; /* Information about widget. */ |
|
|
double value; /* Reading of the widget. */ |
|
|
{ |
|
|
int y, pixelRange; |
|
|
double valueRange; |
|
|
|
|
|
valueRange = scalePtr->toValue - scalePtr->fromValue; |
|
|
pixelRange = ((scalePtr->orient == ORIENT_VERTICAL) |
|
|
? Tk_Height(scalePtr->tkwin) : Tk_Width(scalePtr->tkwin)) |
|
|
- scalePtr->sliderLength - 2*scalePtr->inset - 2*scalePtr->borderWidth; |
|
|
if (valueRange == 0) { |
|
|
y = 0; |
|
|
} else { |
|
|
y = (int) ((value - scalePtr->fromValue) * pixelRange |
|
|
/ valueRange + 0.5); |
|
|
if (y < 0) { |
|
|
y = 0; |
|
|
} else if (y > pixelRange) { |
|
|
y = pixelRange; |
|
|
} |
|
|
} |
|
|
y += scalePtr->sliderLength/2 + scalePtr->inset + scalePtr->borderWidth; |
|
|
return y; |
|
|
} |
|
|
|
|
|
|
|
|
/* $History: tkScale.c $ |
|
|
* |
|
|
* ***************** Version 1 ***************** |
|
|
* User: Dtashley Date: 1/02/01 Time: 3:03a |
|
|
* Created in $/IjuScripter, IjuConsole/Source/Tk Base |
|
|
* Initial check-in. |
|
|
*/ |
|
|
|
|
|
/* End of TKSCALE.C */ |
|
| 1 |
|
/* $Header$ */ |
| 2 |
|
|
| 3 |
|
/* |
| 4 |
|
* tkScale.c -- |
| 5 |
|
* |
| 6 |
|
* This module implements a scale widgets for the Tk toolkit. |
| 7 |
|
* A scale displays a slider that can be adjusted to change a |
| 8 |
|
* value; it also displays numeric labels and a textual label, |
| 9 |
|
* if desired. |
| 10 |
|
* |
| 11 |
|
* The modifications to use floating-point values are based on |
| 12 |
|
* an implementation by Paul Mackerras. The -variable option |
| 13 |
|
* is due to Henning Schulzrinne. All of these are used with |
| 14 |
|
* permission. |
| 15 |
|
* |
| 16 |
|
* Copyright (c) 1990-1994 The Regents of the University of California. |
| 17 |
|
* Copyright (c) 1994-1997 Sun Microsystems, Inc. |
| 18 |
|
* Copyright (c) 1998-2000 by Scriptics Corporation. |
| 19 |
|
* |
| 20 |
|
* See the file "license.terms" for information on usage and redistribution |
| 21 |
|
* of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
| 22 |
|
* |
| 23 |
|
* RCS: @(#) $Id: tkscale.c,v 1.1.1.1 2001/06/13 05:07:45 dtashley Exp $ |
| 24 |
|
*/ |
| 25 |
|
|
| 26 |
|
#include "tkPort.h" |
| 27 |
|
#include "default.h" |
| 28 |
|
#include "tkInt.h" |
| 29 |
|
#include "tclMath.h" |
| 30 |
|
#include "tkScale.h" |
| 31 |
|
|
| 32 |
|
/* |
| 33 |
|
* The following table defines the legal values for the -orient option. |
| 34 |
|
* It is used together with the "enum orient" declaration in tkScale.h. |
| 35 |
|
*/ |
| 36 |
|
|
| 37 |
|
static char *orientStrings[] = { |
| 38 |
|
"horizontal", "vertical", (char *) NULL |
| 39 |
|
}; |
| 40 |
|
|
| 41 |
|
/* |
| 42 |
|
* The following table defines the legal values for the -state option. |
| 43 |
|
* It is used together with the "enum state" declaration in tkScale.h. |
| 44 |
|
*/ |
| 45 |
|
|
| 46 |
|
static char *stateStrings[] = { |
| 47 |
|
"active", "disabled", "normal", (char *) NULL |
| 48 |
|
}; |
| 49 |
|
|
| 50 |
|
static Tk_OptionSpec optionSpecs[] = { |
| 51 |
|
{TK_OPTION_BORDER, "-activebackground", "activeBackground", "Foreground", |
| 52 |
|
DEF_SCALE_ACTIVE_BG_COLOR, -1, Tk_Offset(TkScale, activeBorder), |
| 53 |
|
0, (ClientData) DEF_SCALE_ACTIVE_BG_MONO, 0}, |
| 54 |
|
{TK_OPTION_BORDER, "-background", "background", "Background", |
| 55 |
|
DEF_SCALE_BG_COLOR, -1, Tk_Offset(TkScale, bgBorder), |
| 56 |
|
0, (ClientData) DEF_SCALE_BG_MONO, 0}, |
| 57 |
|
{TK_OPTION_DOUBLE, "-bigincrement", "bigIncrement", "BigIncrement", |
| 58 |
|
DEF_SCALE_BIG_INCREMENT, -1, Tk_Offset(TkScale, bigIncrement), |
| 59 |
|
0, 0, 0}, |
| 60 |
|
{TK_OPTION_SYNONYM, "-bd", (char *) NULL, (char *) NULL, |
| 61 |
|
(char *) NULL, 0, -1, 0, (ClientData) "-borderwidth", 0}, |
| 62 |
|
{TK_OPTION_SYNONYM, "-bg", (char *) NULL, (char *) NULL, |
| 63 |
|
(char *) NULL, 0, -1, 0, (ClientData) "-background", 0}, |
| 64 |
|
{TK_OPTION_PIXELS, "-borderwidth", "borderWidth", "BorderWidth", |
| 65 |
|
DEF_SCALE_BORDER_WIDTH, -1, Tk_Offset(TkScale, borderWidth), |
| 66 |
|
0, 0, 0}, |
| 67 |
|
{TK_OPTION_STRING, "-command", "command", "Command", |
| 68 |
|
DEF_SCALE_COMMAND, -1, Tk_Offset(TkScale, command), |
| 69 |
|
TK_OPTION_NULL_OK, 0, 0}, |
| 70 |
|
{TK_OPTION_CURSOR, "-cursor", "cursor", "Cursor", |
| 71 |
|
DEF_SCALE_CURSOR, -1, Tk_Offset(TkScale, cursor), |
| 72 |
|
TK_OPTION_NULL_OK, 0, 0}, |
| 73 |
|
{TK_OPTION_INT, "-digits", "digits", "Digits", |
| 74 |
|
DEF_SCALE_DIGITS, -1, Tk_Offset(TkScale, digits), |
| 75 |
|
0, 0, 0}, |
| 76 |
|
{TK_OPTION_SYNONYM, "-fg", "foreground", (char *) NULL, |
| 77 |
|
(char *) NULL, 0, -1, 0, (ClientData) "-foreground", 0}, |
| 78 |
|
{TK_OPTION_FONT, "-font", "font", "Font", |
| 79 |
|
DEF_SCALE_FONT, -1, Tk_Offset(TkScale, tkfont), 0, 0, 0}, |
| 80 |
|
{TK_OPTION_COLOR, "-foreground", "foreground", "Foreground", |
| 81 |
|
DEF_SCALE_FG_COLOR, -1, Tk_Offset(TkScale, textColorPtr), 0, |
| 82 |
|
(ClientData) DEF_SCALE_FG_MONO, 0}, |
| 83 |
|
{TK_OPTION_DOUBLE, "-from", "from", "From", DEF_SCALE_FROM, -1, |
| 84 |
|
Tk_Offset(TkScale, fromValue), 0, 0, 0}, |
| 85 |
|
{TK_OPTION_BORDER, "-highlightbackground", "highlightBackground", |
| 86 |
|
"HighlightBackground", DEF_SCALE_HIGHLIGHT_BG_COLOR, |
| 87 |
|
-1, Tk_Offset(TkScale, highlightBorder), |
| 88 |
|
0, (ClientData) DEF_SCALE_HIGHLIGHT_BG_MONO, 0}, |
| 89 |
|
{TK_OPTION_COLOR, "-highlightcolor", "highlightColor", "HighlightColor", |
| 90 |
|
DEF_SCALE_HIGHLIGHT, -1, Tk_Offset(TkScale, highlightColorPtr), |
| 91 |
|
0, 0, 0}, |
| 92 |
|
{TK_OPTION_PIXELS, "-highlightthickness", "highlightThickness", |
| 93 |
|
"HighlightThickness", DEF_SCALE_HIGHLIGHT_WIDTH, -1, |
| 94 |
|
Tk_Offset(TkScale, highlightWidth), 0, 0, 0}, |
| 95 |
|
{TK_OPTION_STRING, "-label", "label", "Label", |
| 96 |
|
DEF_SCALE_LABEL, -1, Tk_Offset(TkScale, label), |
| 97 |
|
TK_OPTION_NULL_OK, 0, 0}, |
| 98 |
|
{TK_OPTION_PIXELS, "-length", "length", "Length", |
| 99 |
|
DEF_SCALE_LENGTH, -1, Tk_Offset(TkScale, length), 0, 0, 0}, |
| 100 |
|
{TK_OPTION_STRING_TABLE, "-orient", "orient", "Orient", |
| 101 |
|
DEF_SCALE_ORIENT, -1, Tk_Offset(TkScale, orient), |
| 102 |
|
0, (ClientData) orientStrings, 0}, |
| 103 |
|
{TK_OPTION_RELIEF, "-relief", "relief", "Relief", |
| 104 |
|
DEF_SCALE_RELIEF, -1, Tk_Offset(TkScale, relief), 0, 0, 0}, |
| 105 |
|
{TK_OPTION_INT, "-repeatdelay", "repeatDelay", "RepeatDelay", |
| 106 |
|
DEF_SCALE_REPEAT_DELAY, -1, Tk_Offset(TkScale, repeatDelay), |
| 107 |
|
0, 0, 0}, |
| 108 |
|
{TK_OPTION_INT, "-repeatinterval", "repeatInterval", "RepeatInterval", |
| 109 |
|
DEF_SCALE_REPEAT_INTERVAL, -1, Tk_Offset(TkScale, repeatInterval), |
| 110 |
|
0, 0, 0}, |
| 111 |
|
{TK_OPTION_DOUBLE, "-resolution", "resolution", "Resolution", |
| 112 |
|
DEF_SCALE_RESOLUTION, -1, Tk_Offset(TkScale, resolution), |
| 113 |
|
0, 0, 0}, |
| 114 |
|
{TK_OPTION_BOOLEAN, "-showvalue", "showValue", "ShowValue", |
| 115 |
|
DEF_SCALE_SHOW_VALUE, -1, Tk_Offset(TkScale, showValue), |
| 116 |
|
0, 0, 0}, |
| 117 |
|
{TK_OPTION_PIXELS, "-sliderlength", "sliderLength", "SliderLength", |
| 118 |
|
DEF_SCALE_SLIDER_LENGTH, -1, Tk_Offset(TkScale, sliderLength), |
| 119 |
|
0, 0, 0}, |
| 120 |
|
{TK_OPTION_RELIEF, "-sliderrelief", "sliderRelief", "SliderRelief", |
| 121 |
|
DEF_SCALE_SLIDER_RELIEF, -1, Tk_Offset(TkScale, sliderRelief), |
| 122 |
|
0, 0, 0}, |
| 123 |
|
{TK_OPTION_STRING_TABLE, "-state", "state", "State", |
| 124 |
|
DEF_SCALE_STATE, -1, Tk_Offset(TkScale, state), |
| 125 |
|
0, (ClientData) stateStrings, 0}, |
| 126 |
|
{TK_OPTION_STRING, "-takefocus", "takeFocus", "TakeFocus", |
| 127 |
|
DEF_SCALE_TAKE_FOCUS, Tk_Offset(TkScale, takeFocusPtr), -1, |
| 128 |
|
TK_OPTION_NULL_OK, 0, 0}, |
| 129 |
|
{TK_OPTION_DOUBLE, "-tickinterval", "tickInterval", "TickInterval", |
| 130 |
|
DEF_SCALE_TICK_INTERVAL, -1, Tk_Offset(TkScale, tickInterval), |
| 131 |
|
0, 0, 0}, |
| 132 |
|
{TK_OPTION_DOUBLE, "-to", "to", "To", |
| 133 |
|
DEF_SCALE_TO, -1, Tk_Offset(TkScale, toValue), 0, 0, 0}, |
| 134 |
|
{TK_OPTION_COLOR, "-troughcolor", "troughColor", "Background", |
| 135 |
|
DEF_SCALE_TROUGH_COLOR, -1, Tk_Offset(TkScale, troughColorPtr), |
| 136 |
|
0, (ClientData) DEF_SCALE_TROUGH_MONO, 0}, |
| 137 |
|
{TK_OPTION_STRING, "-variable", "variable", "Variable", |
| 138 |
|
DEF_SCALE_VARIABLE, Tk_Offset(TkScale, varNamePtr), -1, |
| 139 |
|
TK_OPTION_NULL_OK, 0, 0}, |
| 140 |
|
{TK_OPTION_PIXELS, "-width", "width", "Width", |
| 141 |
|
DEF_SCALE_WIDTH, -1, Tk_Offset(TkScale, width), 0, 0, 0}, |
| 142 |
|
{TK_OPTION_END, (char *) NULL, (char *) NULL, (char *) NULL, |
| 143 |
|
(char *) NULL, 0, -1, 0, 0, 0} |
| 144 |
|
}; |
| 145 |
|
|
| 146 |
|
/* |
| 147 |
|
* The following tables define the scale widget commands and map the |
| 148 |
|
* indexes into the string tables into a single enumerated type used |
| 149 |
|
* to dispatch the scale widget command. |
| 150 |
|
*/ |
| 151 |
|
|
| 152 |
|
static char *commandNames[] = { |
| 153 |
|
"cget", "configure", "coords", "get", "identify", "set", (char *) NULL |
| 154 |
|
}; |
| 155 |
|
|
| 156 |
|
enum command { |
| 157 |
|
COMMAND_CGET, COMMAND_CONFIGURE, COMMAND_COORDS, COMMAND_GET, |
| 158 |
|
COMMAND_IDENTIFY, COMMAND_SET |
| 159 |
|
}; |
| 160 |
|
|
| 161 |
|
/* |
| 162 |
|
* Forward declarations for procedures defined later in this file: |
| 163 |
|
*/ |
| 164 |
|
|
| 165 |
|
static void ComputeFormat _ANSI_ARGS_((TkScale *scalePtr)); |
| 166 |
|
static void ComputeScaleGeometry _ANSI_ARGS_((TkScale *scalePtr)); |
| 167 |
|
static int ConfigureScale _ANSI_ARGS_((Tcl_Interp *interp, |
| 168 |
|
TkScale *scalePtr, int objc, |
| 169 |
|
Tcl_Obj *CONST objv[])); |
| 170 |
|
static void DestroyScale _ANSI_ARGS_((char *memPtr)); |
| 171 |
|
static void ScaleCmdDeletedProc _ANSI_ARGS_(( |
| 172 |
|
ClientData clientData)); |
| 173 |
|
static void ScaleEventProc _ANSI_ARGS_((ClientData clientData, |
| 174 |
|
XEvent *eventPtr)); |
| 175 |
|
static char * ScaleVarProc _ANSI_ARGS_((ClientData clientData, |
| 176 |
|
Tcl_Interp *interp, char *name1, char *name2, |
| 177 |
|
int flags)); |
| 178 |
|
static int ScaleWidgetObjCmd _ANSI_ARGS_((ClientData clientData, |
| 179 |
|
Tcl_Interp *interp, int objc, |
| 180 |
|
Tcl_Obj *CONST objv[])); |
| 181 |
|
static void ScaleWorldChanged _ANSI_ARGS_(( |
| 182 |
|
ClientData instanceData)); |
| 183 |
|
static void ScaleSetVariable _ANSI_ARGS_((TkScale *scalePtr)); |
| 184 |
|
|
| 185 |
|
/* |
| 186 |
|
* The structure below defines scale class behavior by means of procedures |
| 187 |
|
* that can be invoked from generic window code. |
| 188 |
|
*/ |
| 189 |
|
|
| 190 |
|
static TkClassProcs scaleClass = { |
| 191 |
|
NULL, /* createProc. */ |
| 192 |
|
ScaleWorldChanged, /* geometryProc. */ |
| 193 |
|
NULL /* modalProc. */ |
| 194 |
|
}; |
| 195 |
|
|
| 196 |
|
|
| 197 |
|
/* |
| 198 |
|
*-------------------------------------------------------------- |
| 199 |
|
* |
| 200 |
|
* Tk_ScaleObjCmd -- |
| 201 |
|
* |
| 202 |
|
* This procedure is invoked to process the "scale" Tcl |
| 203 |
|
* command. See the user documentation for details on what |
| 204 |
|
* it does. |
| 205 |
|
* |
| 206 |
|
* Results: |
| 207 |
|
* A standard Tcl result. |
| 208 |
|
* |
| 209 |
|
* Side effects: |
| 210 |
|
* See the user documentation. |
| 211 |
|
* |
| 212 |
|
*-------------------------------------------------------------- |
| 213 |
|
*/ |
| 214 |
|
|
| 215 |
|
int |
| 216 |
|
Tk_ScaleObjCmd(clientData, interp, objc, objv) |
| 217 |
|
ClientData clientData; /* Either NULL or pointer to option table. */ |
| 218 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 219 |
|
int objc; /* Number of arguments. */ |
| 220 |
|
Tcl_Obj *CONST objv[]; /* Argument values. */ |
| 221 |
|
{ |
| 222 |
|
register TkScale *scalePtr; |
| 223 |
|
Tk_OptionTable optionTable; |
| 224 |
|
Tk_Window tkwin; |
| 225 |
|
|
| 226 |
|
optionTable = (Tk_OptionTable) clientData; |
| 227 |
|
if (optionTable == NULL) { |
| 228 |
|
Tcl_CmdInfo info; |
| 229 |
|
char *name; |
| 230 |
|
|
| 231 |
|
/* |
| 232 |
|
* We haven't created the option table for this widget class |
| 233 |
|
* yet. Do it now and save the table as the clientData for |
| 234 |
|
* the command, so we'll have access to it in future |
| 235 |
|
* invocations of the command. |
| 236 |
|
*/ |
| 237 |
|
|
| 238 |
|
optionTable = Tk_CreateOptionTable(interp, optionSpecs); |
| 239 |
|
name = Tcl_GetString(objv[0]); |
| 240 |
|
Tcl_GetCommandInfo(interp, name, &info); |
| 241 |
|
info.objClientData = (ClientData) optionTable; |
| 242 |
|
Tcl_SetCommandInfo(interp, name, &info); |
| 243 |
|
} |
| 244 |
|
|
| 245 |
|
if (objc < 2) { |
| 246 |
|
Tcl_WrongNumArgs(interp, 1, objv, "pathName ?options?"); |
| 247 |
|
return TCL_ERROR; |
| 248 |
|
} |
| 249 |
|
|
| 250 |
|
tkwin = Tk_CreateWindowFromPath(interp, Tk_MainWindow(interp), |
| 251 |
|
Tcl_GetString(objv[1]), (char *) NULL); |
| 252 |
|
if (tkwin == NULL) { |
| 253 |
|
return TCL_ERROR; |
| 254 |
|
} |
| 255 |
|
|
| 256 |
|
Tk_SetClass(tkwin, "Scale"); |
| 257 |
|
scalePtr = TkpCreateScale(tkwin); |
| 258 |
|
|
| 259 |
|
/* |
| 260 |
|
* Initialize fields that won't be initialized by ConfigureScale, |
| 261 |
|
* or which ConfigureScale expects to have reasonable values |
| 262 |
|
* (e.g. resource pointers). |
| 263 |
|
*/ |
| 264 |
|
|
| 265 |
|
scalePtr->tkwin = tkwin; |
| 266 |
|
scalePtr->display = Tk_Display(tkwin); |
| 267 |
|
scalePtr->interp = interp; |
| 268 |
|
scalePtr->widgetCmd = Tcl_CreateObjCommand(interp, |
| 269 |
|
Tk_PathName(scalePtr->tkwin), ScaleWidgetObjCmd, |
| 270 |
|
(ClientData) scalePtr, ScaleCmdDeletedProc); |
| 271 |
|
scalePtr->optionTable = optionTable; |
| 272 |
|
scalePtr->orient = ORIENT_VERTICAL; |
| 273 |
|
scalePtr->width = 0; |
| 274 |
|
scalePtr->length = 0; |
| 275 |
|
scalePtr->value = 0.0; |
| 276 |
|
scalePtr->varNamePtr = NULL; |
| 277 |
|
scalePtr->fromValue = 0.0; |
| 278 |
|
scalePtr->toValue = 0.0; |
| 279 |
|
scalePtr->tickInterval = 0.0; |
| 280 |
|
scalePtr->resolution = 1.0; |
| 281 |
|
scalePtr->digits = 0; |
| 282 |
|
scalePtr->bigIncrement = 0.0; |
| 283 |
|
scalePtr->command = NULL; |
| 284 |
|
scalePtr->repeatDelay = 0; |
| 285 |
|
scalePtr->repeatInterval = 0; |
| 286 |
|
scalePtr->label = NULL; |
| 287 |
|
scalePtr->labelLength = 0; |
| 288 |
|
scalePtr->state = STATE_NORMAL; |
| 289 |
|
scalePtr->borderWidth = 0; |
| 290 |
|
scalePtr->bgBorder = NULL; |
| 291 |
|
scalePtr->activeBorder = NULL; |
| 292 |
|
scalePtr->sliderRelief = TK_RELIEF_RAISED; |
| 293 |
|
scalePtr->troughColorPtr = NULL; |
| 294 |
|
scalePtr->troughGC = None; |
| 295 |
|
scalePtr->copyGC = None; |
| 296 |
|
scalePtr->tkfont = NULL; |
| 297 |
|
scalePtr->textColorPtr = NULL; |
| 298 |
|
scalePtr->textGC = None; |
| 299 |
|
scalePtr->relief = TK_RELIEF_FLAT; |
| 300 |
|
scalePtr->highlightWidth = 0; |
| 301 |
|
scalePtr->highlightBorder = NULL; |
| 302 |
|
scalePtr->highlightColorPtr = NULL; |
| 303 |
|
scalePtr->inset = 0; |
| 304 |
|
scalePtr->sliderLength = 0; |
| 305 |
|
scalePtr->showValue = 0; |
| 306 |
|
scalePtr->horizLabelY = 0; |
| 307 |
|
scalePtr->horizValueY = 0; |
| 308 |
|
scalePtr->horizTroughY = 0; |
| 309 |
|
scalePtr->horizTickY = 0; |
| 310 |
|
scalePtr->vertTickRightX = 0; |
| 311 |
|
scalePtr->vertValueRightX = 0; |
| 312 |
|
scalePtr->vertTroughX = 0; |
| 313 |
|
scalePtr->vertLabelX = 0; |
| 314 |
|
scalePtr->fontHeight = 0; |
| 315 |
|
scalePtr->cursor = None; |
| 316 |
|
scalePtr->takeFocusPtr = NULL; |
| 317 |
|
scalePtr->flags = NEVER_SET; |
| 318 |
|
|
| 319 |
|
TkSetClassProcs(scalePtr->tkwin, &scaleClass, (ClientData) scalePtr); |
| 320 |
|
Tk_CreateEventHandler(scalePtr->tkwin, |
| 321 |
|
ExposureMask|StructureNotifyMask|FocusChangeMask, |
| 322 |
|
ScaleEventProc, (ClientData) scalePtr); |
| 323 |
|
|
| 324 |
|
if ((Tk_InitOptions(interp, (char *) scalePtr, optionTable, tkwin) |
| 325 |
|
!= TCL_OK) || |
| 326 |
|
(ConfigureScale(interp, scalePtr, objc - 2, objv + 2) != TCL_OK)) { |
| 327 |
|
Tk_DestroyWindow(scalePtr->tkwin); |
| 328 |
|
return TCL_ERROR; |
| 329 |
|
} |
| 330 |
|
|
| 331 |
|
Tcl_SetResult(interp, Tk_PathName(scalePtr->tkwin), TCL_STATIC); |
| 332 |
|
return TCL_OK; |
| 333 |
|
} |
| 334 |
|
|
| 335 |
|
/* |
| 336 |
|
*-------------------------------------------------------------- |
| 337 |
|
* |
| 338 |
|
* ScaleWidgetObjCmd -- |
| 339 |
|
* |
| 340 |
|
* This procedure is invoked to process the Tcl command |
| 341 |
|
* that corresponds to a widget managed by this module. |
| 342 |
|
* See the user documentation for details on what it does. |
| 343 |
|
* |
| 344 |
|
* Results: |
| 345 |
|
* A standard Tcl result. |
| 346 |
|
* |
| 347 |
|
* Side effects: |
| 348 |
|
* See the user documentation. |
| 349 |
|
* |
| 350 |
|
*-------------------------------------------------------------- |
| 351 |
|
*/ |
| 352 |
|
|
| 353 |
|
static int |
| 354 |
|
ScaleWidgetObjCmd(clientData, interp, objc, objv) |
| 355 |
|
ClientData clientData; /* Information about scale |
| 356 |
|
* widget. */ |
| 357 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 358 |
|
int objc; /* Number of arguments. */ |
| 359 |
|
Tcl_Obj *CONST objv[]; /* Argument strings. */ |
| 360 |
|
{ |
| 361 |
|
TkScale *scalePtr = (TkScale *) clientData; |
| 362 |
|
Tcl_Obj *objPtr; |
| 363 |
|
int index, result; |
| 364 |
|
|
| 365 |
|
if (objc < 2) { |
| 366 |
|
Tcl_WrongNumArgs(interp, 1, objv, "option ?arg arg ...?"); |
| 367 |
|
return TCL_ERROR; |
| 368 |
|
} |
| 369 |
|
result = Tcl_GetIndexFromObj(interp, objv[1], commandNames, |
| 370 |
|
"option", 0, &index); |
| 371 |
|
if (result != TCL_OK) { |
| 372 |
|
return result; |
| 373 |
|
} |
| 374 |
|
Tcl_Preserve((ClientData) scalePtr); |
| 375 |
|
|
| 376 |
|
switch (index) { |
| 377 |
|
case COMMAND_CGET: { |
| 378 |
|
if (objc != 3) { |
| 379 |
|
Tcl_WrongNumArgs(interp, 1, objv, "cget option"); |
| 380 |
|
goto error; |
| 381 |
|
} |
| 382 |
|
objPtr = Tk_GetOptionValue(interp, (char *) scalePtr, |
| 383 |
|
scalePtr->optionTable, objv[2], scalePtr->tkwin); |
| 384 |
|
if (objPtr == NULL) { |
| 385 |
|
goto error; |
| 386 |
|
} else { |
| 387 |
|
Tcl_SetObjResult(interp, objPtr); |
| 388 |
|
} |
| 389 |
|
break; |
| 390 |
|
} |
| 391 |
|
case COMMAND_CONFIGURE: { |
| 392 |
|
if (objc <= 3) { |
| 393 |
|
objPtr = Tk_GetOptionInfo(interp, (char *) scalePtr, |
| 394 |
|
scalePtr->optionTable, |
| 395 |
|
(objc == 3) ? objv[2] : (Tcl_Obj *) NULL, |
| 396 |
|
scalePtr->tkwin); |
| 397 |
|
if (objPtr == NULL) { |
| 398 |
|
goto error; |
| 399 |
|
} else { |
| 400 |
|
Tcl_SetObjResult(interp, objPtr); |
| 401 |
|
} |
| 402 |
|
} else { |
| 403 |
|
result = ConfigureScale(interp, scalePtr, objc-2, objv+2); |
| 404 |
|
} |
| 405 |
|
break; |
| 406 |
|
} |
| 407 |
|
case COMMAND_COORDS: { |
| 408 |
|
int x, y ; |
| 409 |
|
double value; |
| 410 |
|
char buf[TCL_INTEGER_SPACE * 2]; |
| 411 |
|
|
| 412 |
|
if ((objc != 2) && (objc != 3)) { |
| 413 |
|
Tcl_WrongNumArgs(interp, 1, objv, "coords ?value?"); |
| 414 |
|
goto error; |
| 415 |
|
} |
| 416 |
|
if (objc == 3) { |
| 417 |
|
if (Tcl_GetDoubleFromObj(interp, objv[2], &value) |
| 418 |
|
!= TCL_OK) { |
| 419 |
|
goto error; |
| 420 |
|
} |
| 421 |
|
} else { |
| 422 |
|
value = scalePtr->value; |
| 423 |
|
} |
| 424 |
|
if (scalePtr->orient == ORIENT_VERTICAL) { |
| 425 |
|
x = scalePtr->vertTroughX + scalePtr->width/2 |
| 426 |
|
+ scalePtr->borderWidth; |
| 427 |
|
y = TkScaleValueToPixel(scalePtr, value); |
| 428 |
|
} else { |
| 429 |
|
x = TkScaleValueToPixel(scalePtr, value); |
| 430 |
|
y = scalePtr->horizTroughY + scalePtr->width/2 |
| 431 |
|
+ scalePtr->borderWidth; |
| 432 |
|
} |
| 433 |
|
sprintf(buf, "%d %d", x, y); |
| 434 |
|
Tcl_SetResult(interp, buf, TCL_VOLATILE); |
| 435 |
|
break; |
| 436 |
|
} |
| 437 |
|
case COMMAND_GET: { |
| 438 |
|
double value; |
| 439 |
|
int x, y; |
| 440 |
|
char buf[TCL_DOUBLE_SPACE]; |
| 441 |
|
|
| 442 |
|
if ((objc != 2) && (objc != 4)) { |
| 443 |
|
Tcl_WrongNumArgs(interp, 1, objv, "get ?x y?"); |
| 444 |
|
goto error; |
| 445 |
|
} |
| 446 |
|
if (objc == 2) { |
| 447 |
|
value = scalePtr->value; |
| 448 |
|
} else { |
| 449 |
|
if ((Tcl_GetIntFromObj(interp, objv[2], &x) != TCL_OK) |
| 450 |
|
|| (Tcl_GetIntFromObj(interp, objv[3], &y) |
| 451 |
|
!= TCL_OK)) { |
| 452 |
|
goto error; |
| 453 |
|
} |
| 454 |
|
value = TkScalePixelToValue(scalePtr, x, y); |
| 455 |
|
} |
| 456 |
|
sprintf(buf, scalePtr->format, value); |
| 457 |
|
Tcl_SetResult(interp, buf, TCL_VOLATILE); |
| 458 |
|
break; |
| 459 |
|
} |
| 460 |
|
case COMMAND_IDENTIFY: { |
| 461 |
|
int x, y, thing; |
| 462 |
|
|
| 463 |
|
if (objc != 4) { |
| 464 |
|
Tcl_WrongNumArgs(interp, 1, objv, "identify x y"); |
| 465 |
|
goto error; |
| 466 |
|
} |
| 467 |
|
if ((Tcl_GetIntFromObj(interp, objv[2], &x) != TCL_OK) |
| 468 |
|
|| (Tcl_GetIntFromObj(interp, objv[3], &y) != TCL_OK)) { |
| 469 |
|
goto error; |
| 470 |
|
} |
| 471 |
|
thing = TkpScaleElement(scalePtr, x,y); |
| 472 |
|
switch (thing) { |
| 473 |
|
case TROUGH1: |
| 474 |
|
Tcl_SetResult(interp, "trough1", TCL_STATIC); |
| 475 |
|
break; |
| 476 |
|
case SLIDER: |
| 477 |
|
Tcl_SetResult(interp, "slider", TCL_STATIC); |
| 478 |
|
break; |
| 479 |
|
case TROUGH2: |
| 480 |
|
Tcl_SetResult(interp, "trough2", TCL_STATIC); |
| 481 |
|
break; |
| 482 |
|
} |
| 483 |
|
break; |
| 484 |
|
} |
| 485 |
|
case COMMAND_SET: { |
| 486 |
|
double value; |
| 487 |
|
|
| 488 |
|
if (objc != 3) { |
| 489 |
|
Tcl_WrongNumArgs(interp, 1, objv, "set value"); |
| 490 |
|
goto error; |
| 491 |
|
} |
| 492 |
|
if (Tcl_GetDoubleFromObj(interp, objv[2], &value) != TCL_OK) { |
| 493 |
|
goto error; |
| 494 |
|
} |
| 495 |
|
if (scalePtr->state != STATE_DISABLED) { |
| 496 |
|
TkScaleSetValue(scalePtr, value, 1, 1); |
| 497 |
|
} |
| 498 |
|
break; |
| 499 |
|
} |
| 500 |
|
} |
| 501 |
|
Tcl_Release((ClientData) scalePtr); |
| 502 |
|
return result; |
| 503 |
|
|
| 504 |
|
error: |
| 505 |
|
Tcl_Release((ClientData) scalePtr); |
| 506 |
|
return TCL_ERROR; |
| 507 |
|
} |
| 508 |
|
|
| 509 |
|
/* |
| 510 |
|
*---------------------------------------------------------------------- |
| 511 |
|
* |
| 512 |
|
* DestroyScale -- |
| 513 |
|
* |
| 514 |
|
* This procedure is invoked by Tcl_EventuallyFree or Tcl_Release |
| 515 |
|
* to clean up the internal structure of a button at a safe time |
| 516 |
|
* (when no-one is using it anymore). |
| 517 |
|
* |
| 518 |
|
* Results: |
| 519 |
|
* None. |
| 520 |
|
* |
| 521 |
|
* Side effects: |
| 522 |
|
* Everything associated with the scale is freed up. |
| 523 |
|
* |
| 524 |
|
*---------------------------------------------------------------------- |
| 525 |
|
*/ |
| 526 |
|
|
| 527 |
|
static void |
| 528 |
|
DestroyScale(memPtr) |
| 529 |
|
char *memPtr; /* Info about scale widget. */ |
| 530 |
|
{ |
| 531 |
|
register TkScale *scalePtr = (TkScale *) memPtr; |
| 532 |
|
|
| 533 |
|
scalePtr->flags |= SCALE_DELETED; |
| 534 |
|
|
| 535 |
|
Tcl_DeleteCommandFromToken(scalePtr->interp, scalePtr->widgetCmd); |
| 536 |
|
if (scalePtr->flags & REDRAW_PENDING) { |
| 537 |
|
Tcl_CancelIdleCall(TkpDisplayScale, (ClientData) scalePtr); |
| 538 |
|
} |
| 539 |
|
|
| 540 |
|
/* |
| 541 |
|
* Free up all the stuff that requires special handling, then |
| 542 |
|
* let Tk_FreeOptions handle all the standard option-related |
| 543 |
|
* stuff. |
| 544 |
|
*/ |
| 545 |
|
|
| 546 |
|
if (scalePtr->varNamePtr != NULL) { |
| 547 |
|
Tcl_UntraceVar(scalePtr->interp, Tcl_GetString(scalePtr->varNamePtr), |
| 548 |
|
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS, |
| 549 |
|
ScaleVarProc, (ClientData) scalePtr); |
| 550 |
|
} |
| 551 |
|
if (scalePtr->troughGC != None) { |
| 552 |
|
Tk_FreeGC(scalePtr->display, scalePtr->troughGC); |
| 553 |
|
} |
| 554 |
|
if (scalePtr->copyGC != None) { |
| 555 |
|
Tk_FreeGC(scalePtr->display, scalePtr->copyGC); |
| 556 |
|
} |
| 557 |
|
if (scalePtr->textGC != None) { |
| 558 |
|
Tk_FreeGC(scalePtr->display, scalePtr->textGC); |
| 559 |
|
} |
| 560 |
|
Tk_FreeConfigOptions((char *) scalePtr, scalePtr->optionTable, |
| 561 |
|
scalePtr->tkwin); |
| 562 |
|
scalePtr->tkwin = NULL; |
| 563 |
|
TkpDestroyScale(scalePtr); |
| 564 |
|
} |
| 565 |
|
|
| 566 |
|
/* |
| 567 |
|
*---------------------------------------------------------------------- |
| 568 |
|
* |
| 569 |
|
* ConfigureScale -- |
| 570 |
|
* |
| 571 |
|
* This procedure is called to process an argv/argc list, plus |
| 572 |
|
* the Tk option database, in order to configure (or |
| 573 |
|
* reconfigure) a scale widget. |
| 574 |
|
* |
| 575 |
|
* Results: |
| 576 |
|
* The return value is a standard Tcl result. If TCL_ERROR is |
| 577 |
|
* returned, then the interp's result contains an error message. |
| 578 |
|
* |
| 579 |
|
* Side effects: |
| 580 |
|
* Configuration information, such as colors, border width, |
| 581 |
|
* etc. get set for scalePtr; old resources get freed, |
| 582 |
|
* if there were any. |
| 583 |
|
* |
| 584 |
|
*---------------------------------------------------------------------- |
| 585 |
|
*/ |
| 586 |
|
|
| 587 |
|
static int |
| 588 |
|
ConfigureScale(interp, scalePtr, objc, objv) |
| 589 |
|
Tcl_Interp *interp; /* Used for error reporting. */ |
| 590 |
|
register TkScale *scalePtr; /* Information about widget; may or may |
| 591 |
|
* not already have values for some fields. */ |
| 592 |
|
int objc; /* Number of valid entries in objv. */ |
| 593 |
|
Tcl_Obj *CONST objv[]; /* Argument values. */ |
| 594 |
|
{ |
| 595 |
|
Tk_SavedOptions savedOptions; |
| 596 |
|
Tcl_Obj *errorResult = NULL; |
| 597 |
|
int error; |
| 598 |
|
double oldValue = scalePtr->value; |
| 599 |
|
|
| 600 |
|
/* |
| 601 |
|
* Eliminate any existing trace on a variable monitored by the scale. |
| 602 |
|
*/ |
| 603 |
|
|
| 604 |
|
if (scalePtr->varNamePtr != NULL) { |
| 605 |
|
Tcl_UntraceVar(interp, Tcl_GetString(scalePtr->varNamePtr), |
| 606 |
|
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS, |
| 607 |
|
ScaleVarProc, (ClientData) scalePtr); |
| 608 |
|
} |
| 609 |
|
|
| 610 |
|
for (error = 0; error <= 1; error++) { |
| 611 |
|
if (!error) { |
| 612 |
|
/* |
| 613 |
|
* First pass: set options to new values. |
| 614 |
|
*/ |
| 615 |
|
|
| 616 |
|
if (Tk_SetOptions(interp, (char *) scalePtr, |
| 617 |
|
scalePtr->optionTable, objc, objv, |
| 618 |
|
scalePtr->tkwin, &savedOptions, (int *) NULL) != TCL_OK) { |
| 619 |
|
continue; |
| 620 |
|
} |
| 621 |
|
} else { |
| 622 |
|
/* |
| 623 |
|
* Second pass: restore options to old values. |
| 624 |
|
*/ |
| 625 |
|
|
| 626 |
|
errorResult = Tcl_GetObjResult(interp); |
| 627 |
|
Tcl_IncrRefCount(errorResult); |
| 628 |
|
Tk_RestoreSavedOptions(&savedOptions); |
| 629 |
|
} |
| 630 |
|
|
| 631 |
|
/* |
| 632 |
|
* If the scale is tied to the value of a variable, then set |
| 633 |
|
* the scale's value from the value of the variable, if it exists |
| 634 |
|
* and it holds a valid double value. |
| 635 |
|
*/ |
| 636 |
|
|
| 637 |
|
if (scalePtr->varNamePtr != NULL) { |
| 638 |
|
double value; |
| 639 |
|
Tcl_Obj *valuePtr; |
| 640 |
|
|
| 641 |
|
valuePtr = Tcl_ObjGetVar2(interp, scalePtr->varNamePtr, NULL, |
| 642 |
|
TCL_GLOBAL_ONLY); |
| 643 |
|
if ((valuePtr != NULL) && |
| 644 |
|
(Tcl_GetDoubleFromObj(NULL, valuePtr, &value) == TCL_OK)) { |
| 645 |
|
scalePtr->value = TkRoundToResolution(scalePtr, value); |
| 646 |
|
} |
| 647 |
|
} |
| 648 |
|
|
| 649 |
|
/* |
| 650 |
|
* Several options need special processing, such as parsing the |
| 651 |
|
* orientation and creating GCs. |
| 652 |
|
*/ |
| 653 |
|
|
| 654 |
|
scalePtr->fromValue = TkRoundToResolution(scalePtr, |
| 655 |
|
scalePtr->fromValue); |
| 656 |
|
scalePtr->toValue = TkRoundToResolution(scalePtr, scalePtr->toValue); |
| 657 |
|
scalePtr->tickInterval = TkRoundToResolution(scalePtr, |
| 658 |
|
scalePtr->tickInterval); |
| 659 |
|
|
| 660 |
|
/* |
| 661 |
|
* Make sure that the tick interval has the right sign so that |
| 662 |
|
* addition moves from fromValue to toValue. |
| 663 |
|
*/ |
| 664 |
|
|
| 665 |
|
if ((scalePtr->tickInterval < 0) |
| 666 |
|
^ ((scalePtr->toValue - scalePtr->fromValue) < 0)) { |
| 667 |
|
scalePtr->tickInterval = -scalePtr->tickInterval; |
| 668 |
|
} |
| 669 |
|
|
| 670 |
|
ComputeFormat(scalePtr); |
| 671 |
|
|
| 672 |
|
scalePtr->labelLength = scalePtr->label ? strlen(scalePtr->label) : 0; |
| 673 |
|
|
| 674 |
|
Tk_SetBackgroundFromBorder(scalePtr->tkwin, scalePtr->bgBorder); |
| 675 |
|
|
| 676 |
|
if (scalePtr->highlightWidth < 0) { |
| 677 |
|
scalePtr->highlightWidth = 0; |
| 678 |
|
} |
| 679 |
|
scalePtr->inset = scalePtr->highlightWidth + scalePtr->borderWidth; |
| 680 |
|
break; |
| 681 |
|
} |
| 682 |
|
if (!error) { |
| 683 |
|
Tk_FreeSavedOptions(&savedOptions); |
| 684 |
|
} |
| 685 |
|
|
| 686 |
|
/* |
| 687 |
|
* Set the scale value to itself; all this does is to make sure |
| 688 |
|
* that the scale's value is within the new acceptable range for |
| 689 |
|
* the scale. We don't set the var here because we need to make |
| 690 |
|
* special checks for possibly changed varNamePtr. |
| 691 |
|
*/ |
| 692 |
|
|
| 693 |
|
TkScaleSetValue(scalePtr, scalePtr->value, 0, 1); |
| 694 |
|
|
| 695 |
|
/* |
| 696 |
|
* Reestablish the variable trace, if it is needed. |
| 697 |
|
*/ |
| 698 |
|
|
| 699 |
|
if (scalePtr->varNamePtr != NULL) { |
| 700 |
|
Tcl_Obj *valuePtr; |
| 701 |
|
|
| 702 |
|
/* |
| 703 |
|
* Set the associated variable only when the new value differs |
| 704 |
|
* from the current value, or the variable doesn't yet exist |
| 705 |
|
*/ |
| 706 |
|
valuePtr = Tcl_ObjGetVar2(interp, scalePtr->varNamePtr, NULL, |
| 707 |
|
TCL_GLOBAL_ONLY); |
| 708 |
|
if ((valuePtr == NULL) || (scalePtr->value != oldValue) |
| 709 |
|
|| (Tcl_GetDoubleFromObj(NULL, valuePtr, &oldValue) != TCL_OK) |
| 710 |
|
|| (scalePtr->value != oldValue)) { |
| 711 |
|
ScaleSetVariable(scalePtr); |
| 712 |
|
} |
| 713 |
|
Tcl_TraceVar(interp, Tcl_GetString(scalePtr->varNamePtr), |
| 714 |
|
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS, |
| 715 |
|
ScaleVarProc, (ClientData) scalePtr); |
| 716 |
|
} |
| 717 |
|
|
| 718 |
|
ScaleWorldChanged((ClientData) scalePtr); |
| 719 |
|
if (error) { |
| 720 |
|
Tcl_SetObjResult(interp, errorResult); |
| 721 |
|
Tcl_DecrRefCount(errorResult); |
| 722 |
|
return TCL_ERROR; |
| 723 |
|
} else { |
| 724 |
|
return TCL_OK; |
| 725 |
|
} |
| 726 |
|
} |
| 727 |
|
|
| 728 |
|
/* |
| 729 |
|
*--------------------------------------------------------------------------- |
| 730 |
|
* |
| 731 |
|
* ScaleWorldChanged -- |
| 732 |
|
* |
| 733 |
|
* This procedure is called when the world has changed in some |
| 734 |
|
* way and the widget needs to recompute all its graphics contexts |
| 735 |
|
* and determine its new geometry. |
| 736 |
|
* |
| 737 |
|
* Results: |
| 738 |
|
* None. |
| 739 |
|
* |
| 740 |
|
* Side effects: |
| 741 |
|
* Scale will be relayed out and redisplayed. |
| 742 |
|
* |
| 743 |
|
*--------------------------------------------------------------------------- |
| 744 |
|
*/ |
| 745 |
|
|
| 746 |
|
static void |
| 747 |
|
ScaleWorldChanged(instanceData) |
| 748 |
|
ClientData instanceData; /* Information about widget. */ |
| 749 |
|
{ |
| 750 |
|
XGCValues gcValues; |
| 751 |
|
GC gc; |
| 752 |
|
TkScale *scalePtr; |
| 753 |
|
|
| 754 |
|
scalePtr = (TkScale *) instanceData; |
| 755 |
|
|
| 756 |
|
gcValues.foreground = scalePtr->troughColorPtr->pixel; |
| 757 |
|
gc = Tk_GetGC(scalePtr->tkwin, GCForeground, &gcValues); |
| 758 |
|
if (scalePtr->troughGC != None) { |
| 759 |
|
Tk_FreeGC(scalePtr->display, scalePtr->troughGC); |
| 760 |
|
} |
| 761 |
|
scalePtr->troughGC = gc; |
| 762 |
|
|
| 763 |
|
gcValues.font = Tk_FontId(scalePtr->tkfont); |
| 764 |
|
gcValues.foreground = scalePtr->textColorPtr->pixel; |
| 765 |
|
gc = Tk_GetGC(scalePtr->tkwin, GCForeground | GCFont, &gcValues); |
| 766 |
|
if (scalePtr->textGC != None) { |
| 767 |
|
Tk_FreeGC(scalePtr->display, scalePtr->textGC); |
| 768 |
|
} |
| 769 |
|
scalePtr->textGC = gc; |
| 770 |
|
|
| 771 |
|
if (scalePtr->copyGC == None) { |
| 772 |
|
gcValues.graphics_exposures = False; |
| 773 |
|
scalePtr->copyGC = Tk_GetGC(scalePtr->tkwin, GCGraphicsExposures, |
| 774 |
|
&gcValues); |
| 775 |
|
} |
| 776 |
|
scalePtr->inset = scalePtr->highlightWidth + scalePtr->borderWidth; |
| 777 |
|
|
| 778 |
|
/* |
| 779 |
|
* Recompute display-related information, and let the geometry |
| 780 |
|
* manager know how much space is needed now. |
| 781 |
|
*/ |
| 782 |
|
|
| 783 |
|
ComputeScaleGeometry(scalePtr); |
| 784 |
|
|
| 785 |
|
TkEventuallyRedrawScale(scalePtr, REDRAW_ALL); |
| 786 |
|
} |
| 787 |
|
|
| 788 |
|
/* |
| 789 |
|
*---------------------------------------------------------------------- |
| 790 |
|
* |
| 791 |
|
* ComputeFormat -- |
| 792 |
|
* |
| 793 |
|
* This procedure is invoked to recompute the "format" field |
| 794 |
|
* of a scale's widget record, which determines how the value |
| 795 |
|
* of the scale is converted to a string. |
| 796 |
|
* |
| 797 |
|
* Results: |
| 798 |
|
* None. |
| 799 |
|
* |
| 800 |
|
* Side effects: |
| 801 |
|
* The format field of scalePtr is modified. |
| 802 |
|
* |
| 803 |
|
*---------------------------------------------------------------------- |
| 804 |
|
*/ |
| 805 |
|
|
| 806 |
|
static void |
| 807 |
|
ComputeFormat(scalePtr) |
| 808 |
|
TkScale *scalePtr; /* Information about scale widget. */ |
| 809 |
|
{ |
| 810 |
|
double maxValue, x; |
| 811 |
|
int mostSigDigit, numDigits, leastSigDigit, afterDecimal; |
| 812 |
|
int eDigits, fDigits; |
| 813 |
|
|
| 814 |
|
/* |
| 815 |
|
* Compute the displacement from the decimal of the most significant |
| 816 |
|
* digit required for any number in the scale's range. |
| 817 |
|
*/ |
| 818 |
|
|
| 819 |
|
maxValue = fabs(scalePtr->fromValue); |
| 820 |
|
x = fabs(scalePtr->toValue); |
| 821 |
|
if (x > maxValue) { |
| 822 |
|
maxValue = x; |
| 823 |
|
} |
| 824 |
|
if (maxValue == 0) { |
| 825 |
|
maxValue = 1; |
| 826 |
|
} |
| 827 |
|
mostSigDigit = (int) floor(log10(maxValue)); |
| 828 |
|
|
| 829 |
|
/* |
| 830 |
|
* If the number of significant digits wasn't specified explicitly, |
| 831 |
|
* compute it. It's the difference between the most significant |
| 832 |
|
* digit needed to represent any number on the scale and the |
| 833 |
|
* most significant digit of the smallest difference between |
| 834 |
|
* numbers on the scale. In other words, display enough digits so |
| 835 |
|
* that at least one digit will be different between any two adjacent |
| 836 |
|
* positions of the scale. |
| 837 |
|
*/ |
| 838 |
|
|
| 839 |
|
numDigits = scalePtr->digits; |
| 840 |
|
if (numDigits <= 0) { |
| 841 |
|
if (scalePtr->resolution > 0) { |
| 842 |
|
/* |
| 843 |
|
* A resolution was specified for the scale, so just use it. |
| 844 |
|
*/ |
| 845 |
|
|
| 846 |
|
leastSigDigit = (int) floor(log10(scalePtr->resolution)); |
| 847 |
|
} else { |
| 848 |
|
/* |
| 849 |
|
* No resolution was specified, so compute the difference |
| 850 |
|
* in value between adjacent pixels and use it for the least |
| 851 |
|
* significant digit. |
| 852 |
|
*/ |
| 853 |
|
|
| 854 |
|
x = fabs(scalePtr->fromValue - scalePtr->toValue); |
| 855 |
|
if (scalePtr->length > 0) { |
| 856 |
|
x /= scalePtr->length; |
| 857 |
|
} |
| 858 |
|
if (x > 0){ |
| 859 |
|
leastSigDigit = (int) floor(log10(x)); |
| 860 |
|
} else { |
| 861 |
|
leastSigDigit = 0; |
| 862 |
|
} |
| 863 |
|
} |
| 864 |
|
numDigits = mostSigDigit - leastSigDigit + 1; |
| 865 |
|
if (numDigits < 1) { |
| 866 |
|
numDigits = 1; |
| 867 |
|
} |
| 868 |
|
} |
| 869 |
|
|
| 870 |
|
/* |
| 871 |
|
* Compute the number of characters required using "e" format and |
| 872 |
|
* "f" format, and then choose whichever one takes fewer characters. |
| 873 |
|
*/ |
| 874 |
|
|
| 875 |
|
eDigits = numDigits + 4; |
| 876 |
|
if (numDigits > 1) { |
| 877 |
|
eDigits++; /* Decimal point. */ |
| 878 |
|
} |
| 879 |
|
afterDecimal = numDigits - mostSigDigit - 1; |
| 880 |
|
if (afterDecimal < 0) { |
| 881 |
|
afterDecimal = 0; |
| 882 |
|
} |
| 883 |
|
fDigits = (mostSigDigit >= 0) ? mostSigDigit + afterDecimal : afterDecimal; |
| 884 |
|
if (afterDecimal > 0) { |
| 885 |
|
fDigits++; /* Decimal point. */ |
| 886 |
|
} |
| 887 |
|
if (mostSigDigit < 0) { |
| 888 |
|
fDigits++; /* Zero to left of decimal point. */ |
| 889 |
|
} |
| 890 |
|
if (fDigits <= eDigits) { |
| 891 |
|
sprintf(scalePtr->format, "%%.%df", afterDecimal); |
| 892 |
|
} else { |
| 893 |
|
sprintf(scalePtr->format, "%%.%de", numDigits-1); |
| 894 |
|
} |
| 895 |
|
} |
| 896 |
|
|
| 897 |
|
/* |
| 898 |
|
*---------------------------------------------------------------------- |
| 899 |
|
* |
| 900 |
|
* ComputeScaleGeometry -- |
| 901 |
|
* |
| 902 |
|
* This procedure is called to compute various geometrical |
| 903 |
|
* information for a scale, such as where various things get |
| 904 |
|
* displayed. It's called when the window is reconfigured. |
| 905 |
|
* |
| 906 |
|
* Results: |
| 907 |
|
* None. |
| 908 |
|
* |
| 909 |
|
* Side effects: |
| 910 |
|
* Display-related numbers get changed in *scalePtr. The |
| 911 |
|
* geometry manager gets told about the window's preferred size. |
| 912 |
|
* |
| 913 |
|
*---------------------------------------------------------------------- |
| 914 |
|
*/ |
| 915 |
|
|
| 916 |
|
static void |
| 917 |
|
ComputeScaleGeometry(scalePtr) |
| 918 |
|
register TkScale *scalePtr; /* Information about widget. */ |
| 919 |
|
{ |
| 920 |
|
char valueString[PRINT_CHARS]; |
| 921 |
|
int tmp, valuePixels, x, y, extraSpace; |
| 922 |
|
Tk_FontMetrics fm; |
| 923 |
|
|
| 924 |
|
Tk_GetFontMetrics(scalePtr->tkfont, &fm); |
| 925 |
|
scalePtr->fontHeight = fm.linespace + SPACING; |
| 926 |
|
|
| 927 |
|
/* |
| 928 |
|
* Horizontal scales are simpler than vertical ones because |
| 929 |
|
* all sizes are the same (the height of a line of text); |
| 930 |
|
* handle them first and then quit. |
| 931 |
|
*/ |
| 932 |
|
|
| 933 |
|
if (scalePtr->orient == ORIENT_HORIZONTAL) { |
| 934 |
|
y = scalePtr->inset; |
| 935 |
|
extraSpace = 0; |
| 936 |
|
if (scalePtr->labelLength != 0) { |
| 937 |
|
scalePtr->horizLabelY = y + SPACING; |
| 938 |
|
y += scalePtr->fontHeight; |
| 939 |
|
extraSpace = SPACING; |
| 940 |
|
} |
| 941 |
|
if (scalePtr->showValue) { |
| 942 |
|
scalePtr->horizValueY = y + SPACING; |
| 943 |
|
y += scalePtr->fontHeight; |
| 944 |
|
extraSpace = SPACING; |
| 945 |
|
} else { |
| 946 |
|
scalePtr->horizValueY = y; |
| 947 |
|
} |
| 948 |
|
y += extraSpace; |
| 949 |
|
scalePtr->horizTroughY = y; |
| 950 |
|
y += scalePtr->width + 2*scalePtr->borderWidth; |
| 951 |
|
if (scalePtr->tickInterval != 0) { |
| 952 |
|
scalePtr->horizTickY = y + SPACING; |
| 953 |
|
y += scalePtr->fontHeight + SPACING; |
| 954 |
|
} |
| 955 |
|
Tk_GeometryRequest(scalePtr->tkwin, |
| 956 |
|
scalePtr->length + 2*scalePtr->inset, y + scalePtr->inset); |
| 957 |
|
Tk_SetInternalBorder(scalePtr->tkwin, scalePtr->inset); |
| 958 |
|
return; |
| 959 |
|
} |
| 960 |
|
|
| 961 |
|
/* |
| 962 |
|
* Vertical scale: compute the amount of space needed to display |
| 963 |
|
* the scales value by formatting strings for the two end points; |
| 964 |
|
* use whichever length is longer. |
| 965 |
|
*/ |
| 966 |
|
|
| 967 |
|
sprintf(valueString, scalePtr->format, scalePtr->fromValue); |
| 968 |
|
valuePixels = Tk_TextWidth(scalePtr->tkfont, valueString, -1); |
| 969 |
|
|
| 970 |
|
sprintf(valueString, scalePtr->format, scalePtr->toValue); |
| 971 |
|
tmp = Tk_TextWidth(scalePtr->tkfont, valueString, -1); |
| 972 |
|
if (valuePixels < tmp) { |
| 973 |
|
valuePixels = tmp; |
| 974 |
|
} |
| 975 |
|
|
| 976 |
|
/* |
| 977 |
|
* Assign x-locations to the elements of the scale, working from |
| 978 |
|
* left to right. |
| 979 |
|
*/ |
| 980 |
|
|
| 981 |
|
x = scalePtr->inset; |
| 982 |
|
if ((scalePtr->tickInterval != 0) && (scalePtr->showValue)) { |
| 983 |
|
scalePtr->vertTickRightX = x + SPACING + valuePixels; |
| 984 |
|
scalePtr->vertValueRightX = scalePtr->vertTickRightX + valuePixels |
| 985 |
|
+ fm.ascent/2; |
| 986 |
|
x = scalePtr->vertValueRightX + SPACING; |
| 987 |
|
} else if (scalePtr->tickInterval != 0) { |
| 988 |
|
scalePtr->vertTickRightX = x + SPACING + valuePixels; |
| 989 |
|
scalePtr->vertValueRightX = scalePtr->vertTickRightX; |
| 990 |
|
x = scalePtr->vertTickRightX + SPACING; |
| 991 |
|
} else if (scalePtr->showValue) { |
| 992 |
|
scalePtr->vertTickRightX = x; |
| 993 |
|
scalePtr->vertValueRightX = x + SPACING + valuePixels; |
| 994 |
|
x = scalePtr->vertValueRightX + SPACING; |
| 995 |
|
} else { |
| 996 |
|
scalePtr->vertTickRightX = x; |
| 997 |
|
scalePtr->vertValueRightX = x; |
| 998 |
|
} |
| 999 |
|
scalePtr->vertTroughX = x; |
| 1000 |
|
x += 2*scalePtr->borderWidth + scalePtr->width; |
| 1001 |
|
if (scalePtr->labelLength == 0) { |
| 1002 |
|
scalePtr->vertLabelX = 0; |
| 1003 |
|
} else { |
| 1004 |
|
scalePtr->vertLabelX = x + fm.ascent/2; |
| 1005 |
|
x = scalePtr->vertLabelX + fm.ascent/2 |
| 1006 |
|
+ Tk_TextWidth(scalePtr->tkfont, scalePtr->label, |
| 1007 |
|
scalePtr->labelLength); |
| 1008 |
|
} |
| 1009 |
|
Tk_GeometryRequest(scalePtr->tkwin, x + scalePtr->inset, |
| 1010 |
|
scalePtr->length + 2*scalePtr->inset); |
| 1011 |
|
Tk_SetInternalBorder(scalePtr->tkwin, scalePtr->inset); |
| 1012 |
|
} |
| 1013 |
|
|
| 1014 |
|
/* |
| 1015 |
|
*-------------------------------------------------------------- |
| 1016 |
|
* |
| 1017 |
|
* ScaleEventProc -- |
| 1018 |
|
* |
| 1019 |
|
* This procedure is invoked by the Tk dispatcher for various |
| 1020 |
|
* events on scales. |
| 1021 |
|
* |
| 1022 |
|
* Results: |
| 1023 |
|
* None. |
| 1024 |
|
* |
| 1025 |
|
* Side effects: |
| 1026 |
|
* When the window gets deleted, internal structures get |
| 1027 |
|
* cleaned up. When it gets exposed, it is redisplayed. |
| 1028 |
|
* |
| 1029 |
|
*-------------------------------------------------------------- |
| 1030 |
|
*/ |
| 1031 |
|
|
| 1032 |
|
static void |
| 1033 |
|
ScaleEventProc(clientData, eventPtr) |
| 1034 |
|
ClientData clientData; /* Information about window. */ |
| 1035 |
|
XEvent *eventPtr; /* Information about event. */ |
| 1036 |
|
{ |
| 1037 |
|
TkScale *scalePtr = (TkScale *) clientData; |
| 1038 |
|
|
| 1039 |
|
if ((eventPtr->type == Expose) && (eventPtr->xexpose.count == 0)) { |
| 1040 |
|
TkEventuallyRedrawScale(scalePtr, REDRAW_ALL); |
| 1041 |
|
} else if (eventPtr->type == DestroyNotify) { |
| 1042 |
|
DestroyScale((char *) clientData); |
| 1043 |
|
} else if (eventPtr->type == ConfigureNotify) { |
| 1044 |
|
ComputeScaleGeometry(scalePtr); |
| 1045 |
|
TkEventuallyRedrawScale(scalePtr, REDRAW_ALL); |
| 1046 |
|
} else if (eventPtr->type == FocusIn) { |
| 1047 |
|
if (eventPtr->xfocus.detail != NotifyInferior) { |
| 1048 |
|
scalePtr->flags |= GOT_FOCUS; |
| 1049 |
|
if (scalePtr->highlightWidth > 0) { |
| 1050 |
|
TkEventuallyRedrawScale(scalePtr, REDRAW_ALL); |
| 1051 |
|
} |
| 1052 |
|
} |
| 1053 |
|
} else if (eventPtr->type == FocusOut) { |
| 1054 |
|
if (eventPtr->xfocus.detail != NotifyInferior) { |
| 1055 |
|
scalePtr->flags &= ~GOT_FOCUS; |
| 1056 |
|
if (scalePtr->highlightWidth > 0) { |
| 1057 |
|
TkEventuallyRedrawScale(scalePtr, REDRAW_ALL); |
| 1058 |
|
} |
| 1059 |
|
} |
| 1060 |
|
} |
| 1061 |
|
} |
| 1062 |
|
|
| 1063 |
|
/* |
| 1064 |
|
*---------------------------------------------------------------------- |
| 1065 |
|
* |
| 1066 |
|
* ScaleCmdDeletedProc -- |
| 1067 |
|
* |
| 1068 |
|
* This procedure is invoked when a widget command is deleted. If |
| 1069 |
|
* the widget isn't already in the process of being destroyed, |
| 1070 |
|
* this command destroys it. |
| 1071 |
|
* |
| 1072 |
|
* Results: |
| 1073 |
|
* None. |
| 1074 |
|
* |
| 1075 |
|
* Side effects: |
| 1076 |
|
* The widget is destroyed. |
| 1077 |
|
* |
| 1078 |
|
*---------------------------------------------------------------------- |
| 1079 |
|
*/ |
| 1080 |
|
|
| 1081 |
|
static void |
| 1082 |
|
ScaleCmdDeletedProc(clientData) |
| 1083 |
|
ClientData clientData; /* Pointer to widget record for widget. */ |
| 1084 |
|
{ |
| 1085 |
|
TkScale *scalePtr = (TkScale *) clientData; |
| 1086 |
|
Tk_Window tkwin = scalePtr->tkwin; |
| 1087 |
|
|
| 1088 |
|
/* |
| 1089 |
|
* This procedure could be invoked either because the window was |
| 1090 |
|
* destroyed and the command was then deleted (in which case tkwin |
| 1091 |
|
* is NULL) or because the command was deleted, and then this procedure |
| 1092 |
|
* destroys the widget. |
| 1093 |
|
*/ |
| 1094 |
|
|
| 1095 |
|
if (!(scalePtr->flags & SCALE_DELETED)) { |
| 1096 |
|
scalePtr->flags |= SCALE_DELETED; |
| 1097 |
|
Tk_DestroyWindow(tkwin); |
| 1098 |
|
} |
| 1099 |
|
} |
| 1100 |
|
|
| 1101 |
|
/* |
| 1102 |
|
*-------------------------------------------------------------- |
| 1103 |
|
* |
| 1104 |
|
* TkEventuallyRedrawScale -- |
| 1105 |
|
* |
| 1106 |
|
* Arrange for part or all of a scale widget to redrawn at |
| 1107 |
|
* the next convenient time in the future. |
| 1108 |
|
* |
| 1109 |
|
* Results: |
| 1110 |
|
* None. |
| 1111 |
|
* |
| 1112 |
|
* Side effects: |
| 1113 |
|
* If "what" is REDRAW_SLIDER then just the slider and the |
| 1114 |
|
* value readout will be redrawn; if "what" is REDRAW_ALL |
| 1115 |
|
* then the entire widget will be redrawn. |
| 1116 |
|
* |
| 1117 |
|
*-------------------------------------------------------------- |
| 1118 |
|
*/ |
| 1119 |
|
|
| 1120 |
|
void |
| 1121 |
|
TkEventuallyRedrawScale(scalePtr, what) |
| 1122 |
|
register TkScale *scalePtr; /* Information about widget. */ |
| 1123 |
|
int what; /* What to redraw: REDRAW_SLIDER |
| 1124 |
|
* or REDRAW_ALL. */ |
| 1125 |
|
{ |
| 1126 |
|
if ((what == 0) || (scalePtr->tkwin == NULL) |
| 1127 |
|
|| !Tk_IsMapped(scalePtr->tkwin)) { |
| 1128 |
|
return; |
| 1129 |
|
} |
| 1130 |
|
if (!(scalePtr->flags & REDRAW_PENDING)) { |
| 1131 |
|
scalePtr->flags |= REDRAW_PENDING; |
| 1132 |
|
Tcl_DoWhenIdle(TkpDisplayScale, (ClientData) scalePtr); |
| 1133 |
|
} |
| 1134 |
|
scalePtr->flags |= what; |
| 1135 |
|
} |
| 1136 |
|
|
| 1137 |
|
/* |
| 1138 |
|
*-------------------------------------------------------------- |
| 1139 |
|
* |
| 1140 |
|
* TkRoundToResolution -- |
| 1141 |
|
* |
| 1142 |
|
* Round a given floating-point value to the nearest multiple |
| 1143 |
|
* of the scale's resolution. |
| 1144 |
|
* |
| 1145 |
|
* Results: |
| 1146 |
|
* The return value is the rounded result. |
| 1147 |
|
* |
| 1148 |
|
* Side effects: |
| 1149 |
|
* None. |
| 1150 |
|
* |
| 1151 |
|
*-------------------------------------------------------------- |
| 1152 |
|
*/ |
| 1153 |
|
|
| 1154 |
|
double |
| 1155 |
|
TkRoundToResolution(scalePtr, value) |
| 1156 |
|
TkScale *scalePtr; /* Information about scale widget. */ |
| 1157 |
|
double value; /* Value to round. */ |
| 1158 |
|
{ |
| 1159 |
|
double rem, new, tick; |
| 1160 |
|
|
| 1161 |
|
if (scalePtr->resolution <= 0) { |
| 1162 |
|
return value; |
| 1163 |
|
} |
| 1164 |
|
tick = floor(value/scalePtr->resolution); |
| 1165 |
|
new = scalePtr->resolution * tick; |
| 1166 |
|
rem = value - new; |
| 1167 |
|
if (rem < 0) { |
| 1168 |
|
if (rem <= -scalePtr->resolution/2) { |
| 1169 |
|
new = (tick - 1.0) * scalePtr->resolution; |
| 1170 |
|
} |
| 1171 |
|
} else { |
| 1172 |
|
if (rem >= scalePtr->resolution/2) { |
| 1173 |
|
new = (tick + 1.0) * scalePtr->resolution; |
| 1174 |
|
} |
| 1175 |
|
} |
| 1176 |
|
return new; |
| 1177 |
|
} |
| 1178 |
|
|
| 1179 |
|
/* |
| 1180 |
|
*---------------------------------------------------------------------- |
| 1181 |
|
* |
| 1182 |
|
* ScaleVarProc -- |
| 1183 |
|
* |
| 1184 |
|
* This procedure is invoked by Tcl whenever someone modifies a |
| 1185 |
|
* variable associated with a scale widget. |
| 1186 |
|
* |
| 1187 |
|
* Results: |
| 1188 |
|
* NULL is always returned. |
| 1189 |
|
* |
| 1190 |
|
* Side effects: |
| 1191 |
|
* The value displayed in the scale will change to match the |
| 1192 |
|
* variable's new value. If the variable has a bogus value then |
| 1193 |
|
* it is reset to the value of the scale. |
| 1194 |
|
* |
| 1195 |
|
*---------------------------------------------------------------------- |
| 1196 |
|
*/ |
| 1197 |
|
|
| 1198 |
|
/* ARGSUSED */ |
| 1199 |
|
static char * |
| 1200 |
|
ScaleVarProc(clientData, interp, name1, name2, flags) |
| 1201 |
|
ClientData clientData; /* Information about button. */ |
| 1202 |
|
Tcl_Interp *interp; /* Interpreter containing variable. */ |
| 1203 |
|
char *name1; /* Name of variable. */ |
| 1204 |
|
char *name2; /* Second part of variable name. */ |
| 1205 |
|
int flags; /* Information about what happened. */ |
| 1206 |
|
{ |
| 1207 |
|
register TkScale *scalePtr = (TkScale *) clientData; |
| 1208 |
|
char *resultStr; |
| 1209 |
|
double value; |
| 1210 |
|
Tcl_Obj *valuePtr; |
| 1211 |
|
int result; |
| 1212 |
|
|
| 1213 |
|
/* |
| 1214 |
|
* If the variable is unset, then immediately recreate it unless |
| 1215 |
|
* the whole interpreter is going away. |
| 1216 |
|
*/ |
| 1217 |
|
|
| 1218 |
|
if (flags & TCL_TRACE_UNSETS) { |
| 1219 |
|
if ((flags & TCL_TRACE_DESTROYED) && !(flags & TCL_INTERP_DESTROYED)) { |
| 1220 |
|
Tcl_TraceVar(interp, Tcl_GetString(scalePtr->varNamePtr), |
| 1221 |
|
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS, |
| 1222 |
|
ScaleVarProc, clientData); |
| 1223 |
|
scalePtr->flags |= NEVER_SET; |
| 1224 |
|
TkScaleSetValue(scalePtr, scalePtr->value, 1, 0); |
| 1225 |
|
} |
| 1226 |
|
return (char *) NULL; |
| 1227 |
|
} |
| 1228 |
|
|
| 1229 |
|
/* |
| 1230 |
|
* If we came here because we updated the variable (in TkScaleSetValue), |
| 1231 |
|
* then ignore the trace. Otherwise update the scale with the value |
| 1232 |
|
* of the variable. |
| 1233 |
|
*/ |
| 1234 |
|
|
| 1235 |
|
if (scalePtr->flags & SETTING_VAR) { |
| 1236 |
|
return (char *) NULL; |
| 1237 |
|
} |
| 1238 |
|
resultStr = NULL; |
| 1239 |
|
valuePtr = Tcl_ObjGetVar2(interp, scalePtr->varNamePtr, NULL, |
| 1240 |
|
TCL_GLOBAL_ONLY); |
| 1241 |
|
result = Tcl_GetDoubleFromObj(interp, valuePtr, &value); |
| 1242 |
|
if (result != TCL_OK) { |
| 1243 |
|
resultStr = "can't assign non-numeric value to scale variable"; |
| 1244 |
|
ScaleSetVariable(scalePtr); |
| 1245 |
|
} else { |
| 1246 |
|
scalePtr->value = TkRoundToResolution(scalePtr, value); |
| 1247 |
|
|
| 1248 |
|
/* |
| 1249 |
|
* This code is a bit tricky because it sets the scale's value before |
| 1250 |
|
* calling TkScaleSetValue. This way, TkScaleSetValue won't bother |
| 1251 |
|
* to set the variable again or to invoke the -command. However, it |
| 1252 |
|
* also won't redisplay the scale, so we have to ask for that |
| 1253 |
|
* explicitly. |
| 1254 |
|
*/ |
| 1255 |
|
|
| 1256 |
|
TkScaleSetValue(scalePtr, scalePtr->value, 1, 0); |
| 1257 |
|
} |
| 1258 |
|
TkEventuallyRedrawScale(scalePtr, REDRAW_SLIDER); |
| 1259 |
|
|
| 1260 |
|
return resultStr; |
| 1261 |
|
} |
| 1262 |
|
|
| 1263 |
|
/* |
| 1264 |
|
*-------------------------------------------------------------- |
| 1265 |
|
* |
| 1266 |
|
* TkScaleSetValue -- |
| 1267 |
|
* |
| 1268 |
|
* This procedure changes the value of a scale and invokes |
| 1269 |
|
* a Tcl command to reflect the current position of a scale |
| 1270 |
|
* |
| 1271 |
|
* Results: |
| 1272 |
|
* None. |
| 1273 |
|
* |
| 1274 |
|
* Side effects: |
| 1275 |
|
* A Tcl command is invoked, and an additional error-processing |
| 1276 |
|
* command may also be invoked. The scale's slider is redrawn. |
| 1277 |
|
* |
| 1278 |
|
*-------------------------------------------------------------- |
| 1279 |
|
*/ |
| 1280 |
|
|
| 1281 |
|
void |
| 1282 |
|
TkScaleSetValue(scalePtr, value, setVar, invokeCommand) |
| 1283 |
|
register TkScale *scalePtr; /* Info about widget. */ |
| 1284 |
|
double value; /* New value for scale. Gets adjusted |
| 1285 |
|
* if it's off the scale. */ |
| 1286 |
|
int setVar; /* Non-zero means reflect new value through |
| 1287 |
|
* to associated variable, if any. */ |
| 1288 |
|
int invokeCommand; /* Non-zero means invoked -command option |
| 1289 |
|
* to notify of new value, 0 means don't. */ |
| 1290 |
|
{ |
| 1291 |
|
value = TkRoundToResolution(scalePtr, value); |
| 1292 |
|
if ((value < scalePtr->fromValue) |
| 1293 |
|
^ (scalePtr->toValue < scalePtr->fromValue)) { |
| 1294 |
|
value = scalePtr->fromValue; |
| 1295 |
|
} |
| 1296 |
|
if ((value > scalePtr->toValue) |
| 1297 |
|
^ (scalePtr->toValue < scalePtr->fromValue)) { |
| 1298 |
|
value = scalePtr->toValue; |
| 1299 |
|
} |
| 1300 |
|
if (scalePtr->flags & NEVER_SET) { |
| 1301 |
|
scalePtr->flags &= ~NEVER_SET; |
| 1302 |
|
} else if (scalePtr->value == value) { |
| 1303 |
|
return; |
| 1304 |
|
} |
| 1305 |
|
scalePtr->value = value; |
| 1306 |
|
if (invokeCommand) { |
| 1307 |
|
scalePtr->flags |= INVOKE_COMMAND; |
| 1308 |
|
} |
| 1309 |
|
TkEventuallyRedrawScale(scalePtr, REDRAW_SLIDER); |
| 1310 |
|
|
| 1311 |
|
if (setVar && scalePtr->varNamePtr) { |
| 1312 |
|
ScaleSetVariable(scalePtr); |
| 1313 |
|
} |
| 1314 |
|
} |
| 1315 |
|
|
| 1316 |
|
/* |
| 1317 |
|
*-------------------------------------------------------------- |
| 1318 |
|
* |
| 1319 |
|
* ScaleSetVariable -- |
| 1320 |
|
* |
| 1321 |
|
* This procedure sets the variable associated with a scale, if any. |
| 1322 |
|
* |
| 1323 |
|
* Results: |
| 1324 |
|
* None. |
| 1325 |
|
* |
| 1326 |
|
* Side effects: |
| 1327 |
|
* Other write traces on the variable will trigger. |
| 1328 |
|
* |
| 1329 |
|
*-------------------------------------------------------------- |
| 1330 |
|
*/ |
| 1331 |
|
|
| 1332 |
|
static void |
| 1333 |
|
ScaleSetVariable(scalePtr) |
| 1334 |
|
register TkScale *scalePtr; /* Info about widget. */ |
| 1335 |
|
{ |
| 1336 |
|
if (scalePtr->varNamePtr != NULL) { |
| 1337 |
|
char string[PRINT_CHARS]; |
| 1338 |
|
sprintf(string, scalePtr->format, scalePtr->value); |
| 1339 |
|
scalePtr->flags |= SETTING_VAR; |
| 1340 |
|
Tcl_ObjSetVar2(scalePtr->interp, scalePtr->varNamePtr, NULL, |
| 1341 |
|
Tcl_NewStringObj(string, -1), TCL_GLOBAL_ONLY); |
| 1342 |
|
scalePtr->flags &= ~SETTING_VAR; |
| 1343 |
|
} |
| 1344 |
|
} |
| 1345 |
|
|
| 1346 |
|
/* |
| 1347 |
|
*---------------------------------------------------------------------- |
| 1348 |
|
* |
| 1349 |
|
* TkScalePixelToValue -- |
| 1350 |
|
* |
| 1351 |
|
* Given a pixel within a scale window, return the scale |
| 1352 |
|
* reading corresponding to that pixel. |
| 1353 |
|
* |
| 1354 |
|
* Results: |
| 1355 |
|
* A double-precision scale reading. If the value is outside |
| 1356 |
|
* the legal range for the scale then it's rounded to the nearest |
| 1357 |
|
* end of the scale. |
| 1358 |
|
* |
| 1359 |
|
* Side effects: |
| 1360 |
|
* None. |
| 1361 |
|
* |
| 1362 |
|
*---------------------------------------------------------------------- |
| 1363 |
|
*/ |
| 1364 |
|
|
| 1365 |
|
double |
| 1366 |
|
TkScalePixelToValue(scalePtr, x, y) |
| 1367 |
|
register TkScale *scalePtr; /* Information about widget. */ |
| 1368 |
|
int x, y; /* Coordinates of point within |
| 1369 |
|
* window. */ |
| 1370 |
|
{ |
| 1371 |
|
double value, pixelRange; |
| 1372 |
|
|
| 1373 |
|
if (scalePtr->orient == ORIENT_VERTICAL) { |
| 1374 |
|
pixelRange = Tk_Height(scalePtr->tkwin) - scalePtr->sliderLength |
| 1375 |
|
- 2*scalePtr->inset - 2*scalePtr->borderWidth; |
| 1376 |
|
value = y; |
| 1377 |
|
} else { |
| 1378 |
|
pixelRange = Tk_Width(scalePtr->tkwin) - scalePtr->sliderLength |
| 1379 |
|
- 2*scalePtr->inset - 2*scalePtr->borderWidth; |
| 1380 |
|
value = x; |
| 1381 |
|
} |
| 1382 |
|
|
| 1383 |
|
if (pixelRange <= 0) { |
| 1384 |
|
/* |
| 1385 |
|
* Not enough room for the slider to actually slide: just return |
| 1386 |
|
* the scale's current value. |
| 1387 |
|
*/ |
| 1388 |
|
|
| 1389 |
|
return scalePtr->value; |
| 1390 |
|
} |
| 1391 |
|
value -= scalePtr->sliderLength/2 + scalePtr->inset |
| 1392 |
|
+ scalePtr->borderWidth; |
| 1393 |
|
value /= pixelRange; |
| 1394 |
|
if (value < 0) { |
| 1395 |
|
value = 0; |
| 1396 |
|
} |
| 1397 |
|
if (value > 1) { |
| 1398 |
|
value = 1; |
| 1399 |
|
} |
| 1400 |
|
value = scalePtr->fromValue + |
| 1401 |
|
value * (scalePtr->toValue - scalePtr->fromValue); |
| 1402 |
|
return TkRoundToResolution(scalePtr, value); |
| 1403 |
|
} |
| 1404 |
|
|
| 1405 |
|
/* |
| 1406 |
|
*---------------------------------------------------------------------- |
| 1407 |
|
* |
| 1408 |
|
* TkScaleValueToPixel -- |
| 1409 |
|
* |
| 1410 |
|
* Given a reading of the scale, return the x-coordinate or |
| 1411 |
|
* y-coordinate corresponding to that reading, depending on |
| 1412 |
|
* whether the scale is vertical or horizontal, respectively. |
| 1413 |
|
* |
| 1414 |
|
* Results: |
| 1415 |
|
* An integer value giving the pixel location corresponding |
| 1416 |
|
* to reading. The value is restricted to lie within the |
| 1417 |
|
* defined range for the scale. |
| 1418 |
|
* |
| 1419 |
|
* Side effects: |
| 1420 |
|
* None. |
| 1421 |
|
* |
| 1422 |
|
*---------------------------------------------------------------------- |
| 1423 |
|
*/ |
| 1424 |
|
|
| 1425 |
|
int |
| 1426 |
|
TkScaleValueToPixel(scalePtr, value) |
| 1427 |
|
register TkScale *scalePtr; /* Information about widget. */ |
| 1428 |
|
double value; /* Reading of the widget. */ |
| 1429 |
|
{ |
| 1430 |
|
int y, pixelRange; |
| 1431 |
|
double valueRange; |
| 1432 |
|
|
| 1433 |
|
valueRange = scalePtr->toValue - scalePtr->fromValue; |
| 1434 |
|
pixelRange = ((scalePtr->orient == ORIENT_VERTICAL) |
| 1435 |
|
? Tk_Height(scalePtr->tkwin) : Tk_Width(scalePtr->tkwin)) |
| 1436 |
|
- scalePtr->sliderLength - 2*scalePtr->inset - 2*scalePtr->borderWidth; |
| 1437 |
|
if (valueRange == 0) { |
| 1438 |
|
y = 0; |
| 1439 |
|
} else { |
| 1440 |
|
y = (int) ((value - scalePtr->fromValue) * pixelRange |
| 1441 |
|
/ valueRange + 0.5); |
| 1442 |
|
if (y < 0) { |
| 1443 |
|
y = 0; |
| 1444 |
|
} else if (y > pixelRange) { |
| 1445 |
|
y = pixelRange; |
| 1446 |
|
} |
| 1447 |
|
} |
| 1448 |
|
y += scalePtr->sliderLength/2 + scalePtr->inset + scalePtr->borderWidth; |
| 1449 |
|
return y; |
| 1450 |
|
} |
| 1451 |
|
|
| 1452 |
|
/* End of tkscale.c */ |
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