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dashley |
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/* $Header$ */ |
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/* |
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* tkScrollbar.c -- |
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* |
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* This module implements a scrollbar widgets for the Tk |
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* toolkit. A scrollbar displays a slider and two arrows; |
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* mouse clicks on features within the scrollbar cause |
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* scrolling commands to be invoked. |
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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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* |
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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: tkscrollbar.c,v 1.1.1.1 2001/06/13 05:07:52 dtashley Exp $ |
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*/ |
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#include "tkPort.h" |
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#include "tkScrollbar.h" |
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#include "default.h" |
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/* |
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* Custom option for handling "-orient" |
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*/ |
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static Tk_CustomOption orientOption = { |
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(Tk_OptionParseProc *) TkOrientParseProc, |
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TkOrientPrintProc, |
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(ClientData) NULL |
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}; |
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34 |
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/* |
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* Information used for argv parsing. |
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*/ |
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Tk_ConfigSpec tkpScrollbarConfigSpecs[] = { |
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{TK_CONFIG_BORDER, "-activebackground", "activeBackground", "Foreground", |
40 |
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DEF_SCROLLBAR_ACTIVE_BG_COLOR, Tk_Offset(TkScrollbar, activeBorder), |
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TK_CONFIG_COLOR_ONLY}, |
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{TK_CONFIG_BORDER, "-activebackground", "activeBackground", "Foreground", |
43 |
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DEF_SCROLLBAR_ACTIVE_BG_MONO, Tk_Offset(TkScrollbar, activeBorder), |
44 |
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TK_CONFIG_MONO_ONLY}, |
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{TK_CONFIG_RELIEF, "-activerelief", "activeRelief", "Relief", |
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DEF_SCROLLBAR_ACTIVE_RELIEF, Tk_Offset(TkScrollbar, activeRelief), 0}, |
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{TK_CONFIG_BORDER, "-background", "background", "Background", |
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DEF_SCROLLBAR_BG_COLOR, Tk_Offset(TkScrollbar, bgBorder), |
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TK_CONFIG_COLOR_ONLY}, |
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{TK_CONFIG_BORDER, "-background", "background", "Background", |
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DEF_SCROLLBAR_BG_MONO, Tk_Offset(TkScrollbar, bgBorder), |
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TK_CONFIG_MONO_ONLY}, |
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{TK_CONFIG_SYNONYM, "-bd", "borderWidth", (char *) NULL, |
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(char *) NULL, 0, 0}, |
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{TK_CONFIG_SYNONYM, "-bg", "background", (char *) NULL, |
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(char *) NULL, 0, 0}, |
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{TK_CONFIG_PIXELS, "-borderwidth", "borderWidth", "BorderWidth", |
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DEF_SCROLLBAR_BORDER_WIDTH, Tk_Offset(TkScrollbar, borderWidth), 0}, |
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{TK_CONFIG_STRING, "-command", "command", "Command", |
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DEF_SCROLLBAR_COMMAND, Tk_Offset(TkScrollbar, command), |
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TK_CONFIG_NULL_OK}, |
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{TK_CONFIG_ACTIVE_CURSOR, "-cursor", "cursor", "Cursor", |
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DEF_SCROLLBAR_CURSOR, Tk_Offset(TkScrollbar, cursor), TK_CONFIG_NULL_OK}, |
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{TK_CONFIG_PIXELS, "-elementborderwidth", "elementBorderWidth", |
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"BorderWidth", DEF_SCROLLBAR_EL_BORDER_WIDTH, |
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Tk_Offset(TkScrollbar, elementBorderWidth), 0}, |
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{TK_CONFIG_COLOR, "-highlightbackground", "highlightBackground", |
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"HighlightBackground", DEF_SCROLLBAR_HIGHLIGHT_BG, |
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Tk_Offset(TkScrollbar, highlightBgColorPtr), 0}, |
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{TK_CONFIG_COLOR, "-highlightcolor", "highlightColor", "HighlightColor", |
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DEF_SCROLLBAR_HIGHLIGHT, |
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Tk_Offset(TkScrollbar, highlightColorPtr), 0}, |
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{TK_CONFIG_PIXELS, "-highlightthickness", "highlightThickness", |
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"HighlightThickness", |
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DEF_SCROLLBAR_HIGHLIGHT_WIDTH, Tk_Offset(TkScrollbar, highlightWidth), 0}, |
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{TK_CONFIG_BOOLEAN, "-jump", "jump", "Jump", |
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DEF_SCROLLBAR_JUMP, Tk_Offset(TkScrollbar, jump), 0}, |
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{TK_CONFIG_CUSTOM, "-orient", "orient", "Orient", |
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DEF_SCROLLBAR_ORIENT, Tk_Offset(TkScrollbar, vertical), 0, |
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&orientOption}, |
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{TK_CONFIG_RELIEF, "-relief", "relief", "Relief", |
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DEF_SCROLLBAR_RELIEF, Tk_Offset(TkScrollbar, relief), 0}, |
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{TK_CONFIG_INT, "-repeatdelay", "repeatDelay", "RepeatDelay", |
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DEF_SCROLLBAR_REPEAT_DELAY, Tk_Offset(TkScrollbar, repeatDelay), 0}, |
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{TK_CONFIG_INT, "-repeatinterval", "repeatInterval", "RepeatInterval", |
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DEF_SCROLLBAR_REPEAT_INTERVAL, Tk_Offset(TkScrollbar, repeatInterval), 0}, |
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{TK_CONFIG_STRING, "-takefocus", "takeFocus", "TakeFocus", |
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DEF_SCROLLBAR_TAKE_FOCUS, Tk_Offset(TkScrollbar, takeFocus), |
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TK_CONFIG_NULL_OK}, |
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{TK_CONFIG_COLOR, "-troughcolor", "troughColor", "Background", |
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DEF_SCROLLBAR_TROUGH_COLOR, Tk_Offset(TkScrollbar, troughColorPtr), |
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TK_CONFIG_COLOR_ONLY}, |
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{TK_CONFIG_COLOR, "-troughcolor", "troughColor", "Background", |
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DEF_SCROLLBAR_TROUGH_MONO, Tk_Offset(TkScrollbar, troughColorPtr), |
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TK_CONFIG_MONO_ONLY}, |
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{TK_CONFIG_PIXELS, "-width", "width", "Width", |
97 |
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DEF_SCROLLBAR_WIDTH, Tk_Offset(TkScrollbar, width), 0}, |
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{TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL, |
99 |
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(char *) NULL, 0, 0} |
100 |
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}; |
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102 |
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/* |
103 |
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* Forward declarations for procedures defined later in this file: |
104 |
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*/ |
105 |
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106 |
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static int ConfigureScrollbar _ANSI_ARGS_((Tcl_Interp *interp, |
107 |
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TkScrollbar *scrollPtr, int argc, char **argv, |
108 |
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int flags)); |
109 |
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static void ScrollbarCmdDeletedProc _ANSI_ARGS_(( |
110 |
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ClientData clientData)); |
111 |
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static int ScrollbarWidgetCmd _ANSI_ARGS_((ClientData clientData, |
112 |
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Tcl_Interp *, int argc, char **argv)); |
113 |
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114 |
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/* |
115 |
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*-------------------------------------------------------------- |
116 |
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* |
117 |
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* Tk_ScrollbarCmd -- |
118 |
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* |
119 |
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* This procedure is invoked to process the "scrollbar" Tcl |
120 |
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* command. See the user documentation for details on what |
121 |
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* it does. |
122 |
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* |
123 |
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* Results: |
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* A standard Tcl result. |
125 |
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* |
126 |
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* Side effects: |
127 |
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* See the user documentation. |
128 |
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* |
129 |
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*-------------------------------------------------------------- |
130 |
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*/ |
131 |
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132 |
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int |
133 |
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Tk_ScrollbarCmd(clientData, interp, argc, argv) |
134 |
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ClientData clientData; /* Main window associated with |
135 |
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* interpreter. */ |
136 |
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Tcl_Interp *interp; /* Current interpreter. */ |
137 |
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int argc; /* Number of arguments. */ |
138 |
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char **argv; /* Argument strings. */ |
139 |
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{ |
140 |
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Tk_Window tkwin = (Tk_Window) clientData; |
141 |
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register TkScrollbar *scrollPtr; |
142 |
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Tk_Window new; |
143 |
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144 |
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if (argc < 2) { |
145 |
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Tcl_AppendResult(interp, "wrong # args: should be \"", |
146 |
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argv[0], " pathName ?options?\"", (char *) NULL); |
147 |
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return TCL_ERROR; |
148 |
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} |
149 |
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150 |
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new = Tk_CreateWindowFromPath(interp, tkwin, argv[1], (char *) NULL); |
151 |
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if (new == NULL) { |
152 |
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return TCL_ERROR; |
153 |
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} |
154 |
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155 |
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Tk_SetClass(new, "Scrollbar"); |
156 |
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scrollPtr = TkpCreateScrollbar(new); |
157 |
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158 |
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TkSetClassProcs(new, &tkpScrollbarProcs, (ClientData) scrollPtr); |
159 |
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160 |
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/* |
161 |
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* Initialize fields that won't be initialized by ConfigureScrollbar, |
162 |
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* or which ConfigureScrollbar expects to have reasonable values |
163 |
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* (e.g. resource pointers). |
164 |
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*/ |
165 |
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166 |
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scrollPtr->tkwin = new; |
167 |
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scrollPtr->display = Tk_Display(new); |
168 |
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scrollPtr->interp = interp; |
169 |
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scrollPtr->widgetCmd = Tcl_CreateCommand(interp, |
170 |
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Tk_PathName(scrollPtr->tkwin), ScrollbarWidgetCmd, |
171 |
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(ClientData) scrollPtr, ScrollbarCmdDeletedProc); |
172 |
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scrollPtr->vertical = 0; |
173 |
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scrollPtr->width = 0; |
174 |
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scrollPtr->command = NULL; |
175 |
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scrollPtr->commandSize = 0; |
176 |
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scrollPtr->repeatDelay = 0; |
177 |
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scrollPtr->repeatInterval = 0; |
178 |
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scrollPtr->borderWidth = 0; |
179 |
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scrollPtr->bgBorder = NULL; |
180 |
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scrollPtr->activeBorder = NULL; |
181 |
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scrollPtr->troughColorPtr = NULL; |
182 |
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scrollPtr->relief = TK_RELIEF_FLAT; |
183 |
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scrollPtr->highlightWidth = 0; |
184 |
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scrollPtr->highlightBgColorPtr = NULL; |
185 |
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scrollPtr->highlightColorPtr = NULL; |
186 |
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scrollPtr->inset = 0; |
187 |
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scrollPtr->elementBorderWidth = -1; |
188 |
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scrollPtr->arrowLength = 0; |
189 |
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scrollPtr->sliderFirst = 0; |
190 |
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scrollPtr->sliderLast = 0; |
191 |
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scrollPtr->activeField = 0; |
192 |
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scrollPtr->activeRelief = TK_RELIEF_RAISED; |
193 |
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scrollPtr->totalUnits = 0; |
194 |
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scrollPtr->windowUnits = 0; |
195 |
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scrollPtr->firstUnit = 0; |
196 |
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scrollPtr->lastUnit = 0; |
197 |
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scrollPtr->firstFraction = 0.0; |
198 |
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scrollPtr->lastFraction = 0.0; |
199 |
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scrollPtr->cursor = None; |
200 |
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scrollPtr->takeFocus = NULL; |
201 |
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scrollPtr->flags = 0; |
202 |
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203 |
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if (ConfigureScrollbar(interp, scrollPtr, argc-2, argv+2, 0) != TCL_OK) { |
204 |
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Tk_DestroyWindow(scrollPtr->tkwin); |
205 |
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return TCL_ERROR; |
206 |
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} |
207 |
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208 |
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Tcl_SetResult(interp, Tk_PathName(scrollPtr->tkwin), TCL_STATIC); |
209 |
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return TCL_OK; |
210 |
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} |
211 |
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212 |
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/* |
213 |
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*-------------------------------------------------------------- |
214 |
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* |
215 |
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* ScrollbarWidgetCmd -- |
216 |
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* |
217 |
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* This procedure is invoked to process the Tcl command |
218 |
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* that corresponds to a widget managed by this module. |
219 |
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* See the user documentation for details on what it does. |
220 |
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* |
221 |
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* Results: |
222 |
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* A standard Tcl result. |
223 |
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* |
224 |
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* Side effects: |
225 |
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* See the user documentation. |
226 |
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* |
227 |
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*-------------------------------------------------------------- |
228 |
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*/ |
229 |
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230 |
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static int |
231 |
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ScrollbarWidgetCmd(clientData, interp, argc, argv) |
232 |
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ClientData clientData; /* Information about scrollbar |
233 |
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* widget. */ |
234 |
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Tcl_Interp *interp; /* Current interpreter. */ |
235 |
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int argc; /* Number of arguments. */ |
236 |
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char **argv; /* Argument strings. */ |
237 |
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{ |
238 |
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register TkScrollbar *scrollPtr = (TkScrollbar *) clientData; |
239 |
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int result = TCL_OK; |
240 |
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size_t length; |
241 |
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int c; |
242 |
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|
243 |
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if (argc < 2) { |
244 |
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Tcl_AppendResult(interp, "wrong # args: should be \"", |
245 |
|
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argv[0], " option ?arg arg ...?\"", (char *) NULL); |
246 |
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return TCL_ERROR; |
247 |
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} |
248 |
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Tcl_Preserve((ClientData) scrollPtr); |
249 |
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c = argv[1][0]; |
250 |
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length = strlen(argv[1]); |
251 |
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if ((c == 'a') && (strncmp(argv[1], "activate", length) == 0)) { |
252 |
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int oldActiveField; |
253 |
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if (argc == 2) { |
254 |
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switch (scrollPtr->activeField) { |
255 |
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case TOP_ARROW: |
256 |
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Tcl_SetResult(interp, "arrow1", TCL_STATIC); |
257 |
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break; |
258 |
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case SLIDER: |
259 |
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Tcl_SetResult(interp, "slider", TCL_STATIC); |
260 |
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break; |
261 |
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case BOTTOM_ARROW: |
262 |
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Tcl_SetResult(interp, "arrow2", TCL_STATIC); |
263 |
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break; |
264 |
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} |
265 |
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goto done; |
266 |
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|
} |
267 |
|
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if (argc != 3) { |
268 |
|
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Tcl_AppendResult(interp, "wrong # args: should be \"", |
269 |
|
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argv[0], " activate element\"", (char *) NULL); |
270 |
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goto error; |
271 |
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|
} |
272 |
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c = argv[2][0]; |
273 |
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length = strlen(argv[2]); |
274 |
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oldActiveField = scrollPtr->activeField; |
275 |
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if ((c == 'a') && (strcmp(argv[2], "arrow1") == 0)) { |
276 |
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scrollPtr->activeField = TOP_ARROW; |
277 |
|
|
} else if ((c == 'a') && (strcmp(argv[2], "arrow2") == 0)) { |
278 |
|
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scrollPtr->activeField = BOTTOM_ARROW; |
279 |
|
|
} else if ((c == 's') && (strncmp(argv[2], "slider", length) == 0)) { |
280 |
|
|
scrollPtr->activeField = SLIDER; |
281 |
|
|
} else { |
282 |
|
|
scrollPtr->activeField = OUTSIDE; |
283 |
|
|
} |
284 |
|
|
if (oldActiveField != scrollPtr->activeField) { |
285 |
|
|
TkScrollbarEventuallyRedraw(scrollPtr); |
286 |
|
|
} |
287 |
|
|
} else if ((c == 'c') && (strncmp(argv[1], "cget", length) == 0) |
288 |
|
|
&& (length >= 2)) { |
289 |
|
|
if (argc != 3) { |
290 |
|
|
Tcl_AppendResult(interp, "wrong # args: should be \"", |
291 |
|
|
argv[0], " cget option\"", |
292 |
|
|
(char *) NULL); |
293 |
|
|
goto error; |
294 |
|
|
} |
295 |
|
|
result = Tk_ConfigureValue(interp, scrollPtr->tkwin, |
296 |
|
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tkpScrollbarConfigSpecs, (char *) scrollPtr, argv[2], 0); |
297 |
|
|
} else if ((c == 'c') && (strncmp(argv[1], "configure", length) == 0) |
298 |
|
|
&& (length >= 2)) { |
299 |
|
|
if (argc == 2) { |
300 |
|
|
result = Tk_ConfigureInfo(interp, scrollPtr->tkwin, |
301 |
|
|
tkpScrollbarConfigSpecs, (char *) scrollPtr, |
302 |
|
|
(char *) NULL, 0); |
303 |
|
|
} else if (argc == 3) { |
304 |
|
|
result = Tk_ConfigureInfo(interp, scrollPtr->tkwin, |
305 |
|
|
tkpScrollbarConfigSpecs, (char *) scrollPtr, argv[2], 0); |
306 |
|
|
} else { |
307 |
|
|
result = ConfigureScrollbar(interp, scrollPtr, argc-2, argv+2, |
308 |
|
|
TK_CONFIG_ARGV_ONLY); |
309 |
|
|
} |
310 |
|
|
} else if ((c == 'd') && (strncmp(argv[1], "delta", length) == 0)) { |
311 |
|
|
int xDelta, yDelta, pixels, length; |
312 |
|
|
double fraction; |
313 |
|
|
char buf[TCL_DOUBLE_SPACE]; |
314 |
|
|
|
315 |
|
|
if (argc != 4) { |
316 |
|
|
Tcl_AppendResult(interp, "wrong # args: should be \"", |
317 |
|
|
argv[0], " delta xDelta yDelta\"", (char *) NULL); |
318 |
|
|
goto error; |
319 |
|
|
} |
320 |
|
|
if ((Tcl_GetInt(interp, argv[2], &xDelta) != TCL_OK) |
321 |
|
|
|| (Tcl_GetInt(interp, argv[3], &yDelta) != TCL_OK)) { |
322 |
|
|
goto error; |
323 |
|
|
} |
324 |
|
|
if (scrollPtr->vertical) { |
325 |
|
|
pixels = yDelta; |
326 |
|
|
length = Tk_Height(scrollPtr->tkwin) - 1 |
327 |
|
|
- 2*(scrollPtr->arrowLength + scrollPtr->inset); |
328 |
|
|
} else { |
329 |
|
|
pixels = xDelta; |
330 |
|
|
length = Tk_Width(scrollPtr->tkwin) - 1 |
331 |
|
|
- 2*(scrollPtr->arrowLength + scrollPtr->inset); |
332 |
|
|
} |
333 |
|
|
if (length == 0) { |
334 |
|
|
fraction = 0.0; |
335 |
|
|
} else { |
336 |
|
|
fraction = ((double) pixels / (double) length); |
337 |
|
|
} |
338 |
|
|
sprintf(buf, "%g", fraction); |
339 |
|
|
Tcl_SetResult(interp, buf, TCL_VOLATILE); |
340 |
|
|
} else if ((c == 'f') && (strncmp(argv[1], "fraction", length) == 0)) { |
341 |
|
|
int x, y, pos, length; |
342 |
|
|
double fraction; |
343 |
|
|
char buf[TCL_DOUBLE_SPACE]; |
344 |
|
|
|
345 |
|
|
if (argc != 4) { |
346 |
|
|
Tcl_AppendResult(interp, "wrong # args: should be \"", |
347 |
|
|
argv[0], " fraction x y\"", (char *) NULL); |
348 |
|
|
goto error; |
349 |
|
|
} |
350 |
|
|
if ((Tcl_GetInt(interp, argv[2], &x) != TCL_OK) |
351 |
|
|
|| (Tcl_GetInt(interp, argv[3], &y) != TCL_OK)) { |
352 |
|
|
goto error; |
353 |
|
|
} |
354 |
|
|
if (scrollPtr->vertical) { |
355 |
|
|
pos = y - (scrollPtr->arrowLength + scrollPtr->inset); |
356 |
|
|
length = Tk_Height(scrollPtr->tkwin) - 1 |
357 |
|
|
- 2*(scrollPtr->arrowLength + scrollPtr->inset); |
358 |
|
|
} else { |
359 |
|
|
pos = x - (scrollPtr->arrowLength + scrollPtr->inset); |
360 |
|
|
length = Tk_Width(scrollPtr->tkwin) - 1 |
361 |
|
|
- 2*(scrollPtr->arrowLength + scrollPtr->inset); |
362 |
|
|
} |
363 |
|
|
if (length == 0) { |
364 |
|
|
fraction = 0.0; |
365 |
|
|
} else { |
366 |
|
|
fraction = ((double) pos / (double) length); |
367 |
|
|
} |
368 |
|
|
if (fraction < 0) { |
369 |
|
|
fraction = 0; |
370 |
|
|
} else if (fraction > 1.0) { |
371 |
|
|
fraction = 1.0; |
372 |
|
|
} |
373 |
|
|
sprintf(buf, "%g", fraction); |
374 |
|
|
Tcl_SetResult(interp, buf, TCL_VOLATILE); |
375 |
|
|
} else if ((c == 'g') && (strncmp(argv[1], "get", length) == 0)) { |
376 |
|
|
if (argc != 2) { |
377 |
|
|
Tcl_AppendResult(interp, "wrong # args: should be \"", |
378 |
|
|
argv[0], " get\"", (char *) NULL); |
379 |
|
|
goto error; |
380 |
|
|
} |
381 |
|
|
if (scrollPtr->flags & NEW_STYLE_COMMANDS) { |
382 |
|
|
char first[TCL_DOUBLE_SPACE], last[TCL_DOUBLE_SPACE]; |
383 |
|
|
|
384 |
|
|
Tcl_PrintDouble(interp, scrollPtr->firstFraction, first); |
385 |
|
|
Tcl_PrintDouble(interp, scrollPtr->lastFraction, last); |
386 |
|
|
Tcl_AppendResult(interp, first, " ", last, (char *) NULL); |
387 |
|
|
} else { |
388 |
|
|
char buf[TCL_INTEGER_SPACE * 4]; |
389 |
|
|
|
390 |
|
|
sprintf(buf, "%d %d %d %d", scrollPtr->totalUnits, |
391 |
|
|
scrollPtr->windowUnits, scrollPtr->firstUnit, |
392 |
|
|
scrollPtr->lastUnit); |
393 |
|
|
Tcl_SetResult(interp, buf, TCL_VOLATILE); |
394 |
|
|
} |
395 |
|
|
} else if ((c == 'i') && (strncmp(argv[1], "identify", length) == 0)) { |
396 |
|
|
int x, y, thing; |
397 |
|
|
|
398 |
|
|
if (argc != 4) { |
399 |
|
|
Tcl_AppendResult(interp, "wrong # args: should be \"", |
400 |
|
|
argv[0], " identify x y\"", (char *) NULL); |
401 |
|
|
goto error; |
402 |
|
|
} |
403 |
|
|
if ((Tcl_GetInt(interp, argv[2], &x) != TCL_OK) |
404 |
|
|
|| (Tcl_GetInt(interp, argv[3], &y) != TCL_OK)) { |
405 |
|
|
goto error; |
406 |
|
|
} |
407 |
|
|
thing = TkpScrollbarPosition(scrollPtr, x,y); |
408 |
|
|
switch (thing) { |
409 |
|
|
case TOP_ARROW: |
410 |
|
|
Tcl_SetResult(interp, "arrow1", TCL_STATIC); |
411 |
|
|
break; |
412 |
|
|
case TOP_GAP: |
413 |
|
|
Tcl_SetResult(interp, "trough1", TCL_STATIC); |
414 |
|
|
break; |
415 |
|
|
case SLIDER: |
416 |
|
|
Tcl_SetResult(interp, "slider", TCL_STATIC); |
417 |
|
|
break; |
418 |
|
|
case BOTTOM_GAP: |
419 |
|
|
Tcl_SetResult(interp, "trough2", TCL_STATIC); |
420 |
|
|
break; |
421 |
|
|
case BOTTOM_ARROW: |
422 |
|
|
Tcl_SetResult(interp, "arrow2", TCL_STATIC); |
423 |
|
|
break; |
424 |
|
|
} |
425 |
|
|
} else if ((c == 's') && (strncmp(argv[1], "set", length) == 0)) { |
426 |
|
|
int totalUnits, windowUnits, firstUnit, lastUnit; |
427 |
|
|
|
428 |
|
|
if (argc == 4) { |
429 |
|
|
double first, last; |
430 |
|
|
|
431 |
|
|
if (Tcl_GetDouble(interp, argv[2], &first) != TCL_OK) { |
432 |
|
|
goto error; |
433 |
|
|
} |
434 |
|
|
if (Tcl_GetDouble(interp, argv[3], &last) != TCL_OK) { |
435 |
|
|
goto error; |
436 |
|
|
} |
437 |
|
|
if (first < 0) { |
438 |
|
|
scrollPtr->firstFraction = 0; |
439 |
|
|
} else if (first > 1.0) { |
440 |
|
|
scrollPtr->firstFraction = 1.0; |
441 |
|
|
} else { |
442 |
|
|
scrollPtr->firstFraction = first; |
443 |
|
|
} |
444 |
|
|
if (last < scrollPtr->firstFraction) { |
445 |
|
|
scrollPtr->lastFraction = scrollPtr->firstFraction; |
446 |
|
|
} else if (last > 1.0) { |
447 |
|
|
scrollPtr->lastFraction = 1.0; |
448 |
|
|
} else { |
449 |
|
|
scrollPtr->lastFraction = last; |
450 |
|
|
} |
451 |
|
|
scrollPtr->flags |= NEW_STYLE_COMMANDS; |
452 |
|
|
} else if (argc == 6) { |
453 |
|
|
if (Tcl_GetInt(interp, argv[2], &totalUnits) != TCL_OK) { |
454 |
|
|
goto error; |
455 |
|
|
} |
456 |
|
|
if (totalUnits < 0) { |
457 |
|
|
totalUnits = 0; |
458 |
|
|
} |
459 |
|
|
if (Tcl_GetInt(interp, argv[3], &windowUnits) != TCL_OK) { |
460 |
|
|
goto error; |
461 |
|
|
} |
462 |
|
|
if (windowUnits < 0) { |
463 |
|
|
windowUnits = 0; |
464 |
|
|
} |
465 |
|
|
if (Tcl_GetInt(interp, argv[4], &firstUnit) != TCL_OK) { |
466 |
|
|
goto error; |
467 |
|
|
} |
468 |
|
|
if (Tcl_GetInt(interp, argv[5], &lastUnit) != TCL_OK) { |
469 |
|
|
goto error; |
470 |
|
|
} |
471 |
|
|
if (totalUnits > 0) { |
472 |
|
|
if (lastUnit < firstUnit) { |
473 |
|
|
lastUnit = firstUnit; |
474 |
|
|
} |
475 |
|
|
} else { |
476 |
|
|
firstUnit = lastUnit = 0; |
477 |
|
|
} |
478 |
|
|
scrollPtr->totalUnits = totalUnits; |
479 |
|
|
scrollPtr->windowUnits = windowUnits; |
480 |
|
|
scrollPtr->firstUnit = firstUnit; |
481 |
|
|
scrollPtr->lastUnit = lastUnit; |
482 |
|
|
if (scrollPtr->totalUnits == 0) { |
483 |
|
|
scrollPtr->firstFraction = 0.0; |
484 |
|
|
scrollPtr->lastFraction = 1.0; |
485 |
|
|
} else { |
486 |
|
|
scrollPtr->firstFraction = ((double) firstUnit)/totalUnits; |
487 |
|
|
scrollPtr->lastFraction = ((double) (lastUnit+1))/totalUnits; |
488 |
|
|
} |
489 |
|
|
scrollPtr->flags &= ~NEW_STYLE_COMMANDS; |
490 |
|
|
} else { |
491 |
|
|
Tcl_AppendResult(interp, "wrong # args: should be \"", |
492 |
|
|
argv[0], " set firstFraction lastFraction\" or \"", |
493 |
|
|
argv[0], |
494 |
|
|
" set totalUnits windowUnits firstUnit lastUnit\"", |
495 |
|
|
(char *) NULL); |
496 |
|
|
goto error; |
497 |
|
|
} |
498 |
|
|
TkpComputeScrollbarGeometry(scrollPtr); |
499 |
|
|
TkScrollbarEventuallyRedraw(scrollPtr); |
500 |
|
|
} else { |
501 |
|
|
Tcl_AppendResult(interp, "bad option \"", argv[1], |
502 |
|
|
"\": must be activate, cget, configure, delta, fraction, ", |
503 |
|
|
"get, identify, or set", (char *) NULL); |
504 |
|
|
goto error; |
505 |
|
|
} |
506 |
|
|
done: |
507 |
|
|
Tcl_Release((ClientData) scrollPtr); |
508 |
|
|
return result; |
509 |
|
|
|
510 |
|
|
error: |
511 |
|
|
Tcl_Release((ClientData) scrollPtr); |
512 |
|
|
return TCL_ERROR; |
513 |
|
|
} |
514 |
|
|
|
515 |
|
|
/* |
516 |
|
|
*---------------------------------------------------------------------- |
517 |
|
|
* |
518 |
|
|
* ConfigureScrollbar -- |
519 |
|
|
* |
520 |
|
|
* This procedure is called to process an argv/argc list, plus |
521 |
|
|
* the Tk option database, in order to configure (or |
522 |
|
|
* reconfigure) a scrollbar widget. |
523 |
|
|
* |
524 |
|
|
* Results: |
525 |
|
|
* The return value is a standard Tcl result. If TCL_ERROR is |
526 |
|
|
* returned, then the interp's result contains an error message. |
527 |
|
|
* |
528 |
|
|
* Side effects: |
529 |
|
|
* Configuration information, such as colors, border width, |
530 |
|
|
* etc. get set for scrollPtr; old resources get freed, |
531 |
|
|
* if there were any. |
532 |
|
|
* |
533 |
|
|
*---------------------------------------------------------------------- |
534 |
|
|
*/ |
535 |
|
|
|
536 |
|
|
static int |
537 |
|
|
ConfigureScrollbar(interp, scrollPtr, argc, argv, flags) |
538 |
|
|
Tcl_Interp *interp; /* Used for error reporting. */ |
539 |
|
|
register TkScrollbar *scrollPtr; /* Information about widget; may or |
540 |
|
|
* may not already have values for |
541 |
|
|
* some fields. */ |
542 |
|
|
int argc; /* Number of valid entries in argv. */ |
543 |
|
|
char **argv; /* Arguments. */ |
544 |
|
|
int flags; /* Flags to pass to |
545 |
|
|
* Tk_ConfigureWidget. */ |
546 |
|
|
{ |
547 |
|
|
if (Tk_ConfigureWidget(interp, scrollPtr->tkwin, tkpScrollbarConfigSpecs, |
548 |
|
|
argc, argv, (char *) scrollPtr, flags) != TCL_OK) { |
549 |
|
|
return TCL_ERROR; |
550 |
|
|
} |
551 |
|
|
|
552 |
|
|
/* |
553 |
|
|
* A few options need special processing, such as setting the |
554 |
|
|
* background from a 3-D border. |
555 |
|
|
*/ |
556 |
|
|
|
557 |
|
|
if (scrollPtr->command != NULL) { |
558 |
|
|
scrollPtr->commandSize = strlen(scrollPtr->command); |
559 |
|
|
} else { |
560 |
|
|
scrollPtr->commandSize = 0; |
561 |
|
|
} |
562 |
|
|
|
563 |
|
|
/* |
564 |
|
|
* Configure platform specific options. |
565 |
|
|
*/ |
566 |
|
|
|
567 |
|
|
TkpConfigureScrollbar(scrollPtr); |
568 |
|
|
|
569 |
|
|
/* |
570 |
|
|
* Register the desired geometry for the window (leave enough space |
571 |
|
|
* for the two arrows plus a minimum-size slider, plus border around |
572 |
|
|
* the whole window, if any). Then arrange for the window to be |
573 |
|
|
* redisplayed. |
574 |
|
|
*/ |
575 |
|
|
|
576 |
|
|
TkpComputeScrollbarGeometry(scrollPtr); |
577 |
|
|
TkScrollbarEventuallyRedraw(scrollPtr); |
578 |
|
|
return TCL_OK; |
579 |
|
|
} |
580 |
|
|
|
581 |
|
|
/* |
582 |
|
|
*-------------------------------------------------------------- |
583 |
|
|
* |
584 |
|
|
* TkScrollbarEventProc -- |
585 |
|
|
* |
586 |
|
|
* This procedure is invoked by the Tk dispatcher for various |
587 |
|
|
* events on scrollbars. |
588 |
|
|
* |
589 |
|
|
* Results: |
590 |
|
|
* None. |
591 |
|
|
* |
592 |
|
|
* Side effects: |
593 |
|
|
* When the window gets deleted, internal structures get |
594 |
|
|
* cleaned up. When it gets exposed, it is redisplayed. |
595 |
|
|
* |
596 |
|
|
*-------------------------------------------------------------- |
597 |
|
|
*/ |
598 |
|
|
|
599 |
|
|
void |
600 |
|
|
TkScrollbarEventProc(clientData, eventPtr) |
601 |
|
|
ClientData clientData; /* Information about window. */ |
602 |
|
|
XEvent *eventPtr; /* Information about event. */ |
603 |
|
|
{ |
604 |
|
|
TkScrollbar *scrollPtr = (TkScrollbar *) clientData; |
605 |
|
|
|
606 |
|
|
if ((eventPtr->type == Expose) && (eventPtr->xexpose.count == 0)) { |
607 |
|
|
TkScrollbarEventuallyRedraw(scrollPtr); |
608 |
|
|
} else if (eventPtr->type == DestroyNotify) { |
609 |
|
|
TkpDestroyScrollbar(scrollPtr); |
610 |
|
|
if (scrollPtr->tkwin != NULL) { |
611 |
|
|
scrollPtr->tkwin = NULL; |
612 |
|
|
Tcl_DeleteCommandFromToken(scrollPtr->interp, |
613 |
|
|
scrollPtr->widgetCmd); |
614 |
|
|
} |
615 |
|
|
if (scrollPtr->flags & REDRAW_PENDING) { |
616 |
|
|
Tcl_CancelIdleCall(TkpDisplayScrollbar, (ClientData) scrollPtr); |
617 |
|
|
} |
618 |
|
|
/* |
619 |
|
|
* Free up all the stuff that requires special handling, then |
620 |
|
|
* let Tk_FreeOptions handle all the standard option-related |
621 |
|
|
* stuff. |
622 |
|
|
*/ |
623 |
|
|
|
624 |
|
|
Tk_FreeOptions(tkpScrollbarConfigSpecs, (char *) scrollPtr, |
625 |
|
|
scrollPtr->display, 0); |
626 |
|
|
Tcl_EventuallyFree((ClientData) scrollPtr, TCL_DYNAMIC); |
627 |
|
|
} else if (eventPtr->type == ConfigureNotify) { |
628 |
|
|
TkpComputeScrollbarGeometry(scrollPtr); |
629 |
|
|
TkScrollbarEventuallyRedraw(scrollPtr); |
630 |
|
|
} else if (eventPtr->type == FocusIn) { |
631 |
|
|
if (eventPtr->xfocus.detail != NotifyInferior) { |
632 |
|
|
scrollPtr->flags |= GOT_FOCUS; |
633 |
|
|
if (scrollPtr->highlightWidth > 0) { |
634 |
|
|
TkScrollbarEventuallyRedraw(scrollPtr); |
635 |
|
|
} |
636 |
|
|
} |
637 |
|
|
} else if (eventPtr->type == FocusOut) { |
638 |
|
|
if (eventPtr->xfocus.detail != NotifyInferior) { |
639 |
|
|
scrollPtr->flags &= ~GOT_FOCUS; |
640 |
|
|
if (scrollPtr->highlightWidth > 0) { |
641 |
|
|
TkScrollbarEventuallyRedraw(scrollPtr); |
642 |
|
|
} |
643 |
|
|
} |
644 |
|
|
} |
645 |
|
|
} |
646 |
|
|
|
647 |
|
|
/* |
648 |
|
|
*---------------------------------------------------------------------- |
649 |
|
|
* |
650 |
|
|
* ScrollbarCmdDeletedProc -- |
651 |
|
|
* |
652 |
|
|
* This procedure is invoked when a widget command is deleted. If |
653 |
|
|
* the widget isn't already in the process of being destroyed, |
654 |
|
|
* this command destroys it. |
655 |
|
|
* |
656 |
|
|
* Results: |
657 |
|
|
* None. |
658 |
|
|
* |
659 |
|
|
* Side effects: |
660 |
|
|
* The widget is destroyed. |
661 |
|
|
* |
662 |
|
|
*---------------------------------------------------------------------- |
663 |
|
|
*/ |
664 |
|
|
|
665 |
|
|
static void |
666 |
|
|
ScrollbarCmdDeletedProc(clientData) |
667 |
|
|
ClientData clientData; /* Pointer to widget record for widget. */ |
668 |
|
|
{ |
669 |
|
|
TkScrollbar *scrollPtr = (TkScrollbar *) clientData; |
670 |
|
|
Tk_Window tkwin = scrollPtr->tkwin; |
671 |
|
|
|
672 |
|
|
/* |
673 |
|
|
* This procedure could be invoked either because the window was |
674 |
|
|
* destroyed and the command was then deleted (in which case tkwin |
675 |
|
|
* is NULL) or because the command was deleted, and then this procedure |
676 |
|
|
* destroys the widget. |
677 |
|
|
*/ |
678 |
|
|
|
679 |
|
|
if (tkwin != NULL) { |
680 |
|
|
scrollPtr->tkwin = NULL; |
681 |
|
|
Tk_DestroyWindow(tkwin); |
682 |
|
|
} |
683 |
|
|
} |
684 |
|
|
|
685 |
|
|
/* |
686 |
|
|
*-------------------------------------------------------------- |
687 |
|
|
* |
688 |
|
|
* TkScrollbarEventuallyRedraw -- |
689 |
|
|
* |
690 |
|
|
* Arrange for one or more of the fields of a scrollbar |
691 |
|
|
* to be redrawn. |
692 |
|
|
* |
693 |
|
|
* Results: |
694 |
|
|
* None. |
695 |
|
|
* |
696 |
|
|
* Side effects: |
697 |
|
|
* None. |
698 |
|
|
* |
699 |
|
|
*-------------------------------------------------------------- |
700 |
|
|
*/ |
701 |
|
|
|
702 |
|
|
void |
703 |
|
|
TkScrollbarEventuallyRedraw(scrollPtr) |
704 |
|
|
register TkScrollbar *scrollPtr; /* Information about widget. */ |
705 |
|
|
{ |
706 |
|
|
if ((scrollPtr->tkwin == NULL) || (!Tk_IsMapped(scrollPtr->tkwin))) { |
707 |
|
|
return; |
708 |
|
|
} |
709 |
|
|
if ((scrollPtr->flags & REDRAW_PENDING) == 0) { |
710 |
|
|
Tcl_DoWhenIdle(TkpDisplayScrollbar, (ClientData) scrollPtr); |
711 |
|
|
scrollPtr->flags |= REDRAW_PENDING; |
712 |
|
|
} |
713 |
|
|
} |
714 |
|
|
|
715 |
|
|
/* End of tkscrollbar.c */ |