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/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tk_base/tkunixscale.c,v 1.1.1.1 2001/06/13 05:11:27 dtashley Exp $ */ |
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/* |
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* tkUnixScale.c -- |
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* |
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* This file implements the X specific portion of the scrollbar |
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* widget. |
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* |
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* Copyright (c) 1996 by 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: tkunixscale.c,v 1.1.1.1 2001/06/13 05:11:27 dtashley Exp $ |
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*/ |
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#include "tkScale.h" |
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#include "tkInt.h" |
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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 DisplayHorizontalScale _ANSI_ARGS_((TkScale *scalePtr, |
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Drawable drawable, XRectangle *drawnAreaPtr)); |
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static void DisplayHorizontalValue _ANSI_ARGS_((TkScale *scalePtr, |
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Drawable drawable, double value, int top)); |
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static void DisplayVerticalScale _ANSI_ARGS_((TkScale *scalePtr, |
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Drawable drawable, XRectangle *drawnAreaPtr)); |
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static void DisplayVerticalValue _ANSI_ARGS_((TkScale *scalePtr, |
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Drawable drawable, double value, int rightEdge)); |
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/* |
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*---------------------------------------------------------------------- |
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* |
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* TkpCreateScale -- |
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* |
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* Allocate a new TkScale structure. |
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* |
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* Results: |
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* Returns a newly allocated TkScale structure. |
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* |
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* Side effects: |
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* None. |
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* |
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*---------------------------------------------------------------------- |
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*/ |
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TkScale * |
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TkpCreateScale(tkwin) |
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Tk_Window tkwin; |
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{ |
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return (TkScale *) ckalloc(sizeof(TkScale)); |
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} |
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/* |
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*---------------------------------------------------------------------- |
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* |
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* TkpDestroyScale -- |
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* |
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* Destroy a TkScale structure. It's necessary to do this with |
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* Tcl_EventuallyFree to allow the Tcl_Preserve(scalePtr) to work |
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* as expected in TkpDisplayScale. (hobbs) |
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* |
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* Results: |
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* None |
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* |
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* Side effects: |
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* Memory is freed. |
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* |
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*---------------------------------------------------------------------- |
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*/ |
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void |
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TkpDestroyScale(scalePtr) |
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TkScale *scalePtr; |
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{ |
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Tcl_EventuallyFree((ClientData) scalePtr, TCL_DYNAMIC); |
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} |
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/* |
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*-------------------------------------------------------------- |
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* |
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* DisplayVerticalScale -- |
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* |
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* This procedure redraws the contents of a vertical scale |
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* window. It is invoked as a do-when-idle handler, so it only |
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* runs when there's nothing else for the application to do. |
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* |
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* Results: |
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* There is no return value. If only a part of the scale needs |
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* to be redrawn, then drawnAreaPtr is modified to reflect the |
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* area that was actually modified. |
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* |
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* Side effects: |
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* Information appears on the screen. |
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* |
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*-------------------------------------------------------------- |
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*/ |
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static void |
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DisplayVerticalScale(scalePtr, drawable, drawnAreaPtr) |
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TkScale *scalePtr; /* Widget record for scale. */ |
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Drawable drawable; /* Where to display scale (window |
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* or pixmap). */ |
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XRectangle *drawnAreaPtr; /* Initally contains area of window; |
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* if only a part of the scale is |
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* redrawn, gets modified to reflect |
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* the part of the window that was |
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* redrawn. */ |
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{ |
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Tk_Window tkwin = scalePtr->tkwin; |
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int x, y, width, height, shadowWidth; |
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double tickValue, tickInterval = scalePtr->tickInterval; |
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Tk_3DBorder sliderBorder; |
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/* |
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* Display the information from left to right across the window. |
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*/ |
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if (!(scalePtr->flags & REDRAW_OTHER)) { |
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drawnAreaPtr->x = scalePtr->vertTickRightX; |
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drawnAreaPtr->y = scalePtr->inset; |
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drawnAreaPtr->width = scalePtr->vertTroughX + scalePtr->width |
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+ 2*scalePtr->borderWidth - scalePtr->vertTickRightX; |
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drawnAreaPtr->height -= 2*scalePtr->inset; |
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} |
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Tk_Fill3DRectangle(tkwin, drawable, scalePtr->bgBorder, |
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drawnAreaPtr->x, drawnAreaPtr->y, drawnAreaPtr->width, |
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drawnAreaPtr->height, 0, TK_RELIEF_FLAT); |
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if (scalePtr->flags & REDRAW_OTHER) { |
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/* |
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* Display the tick marks. |
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*/ |
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if (tickInterval != 0) { |
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double ticks, maxTicks; |
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/* |
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* Ensure that we will only draw enough of the tick values |
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* such that they don't overlap |
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*/ |
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ticks = fabs((scalePtr->toValue - scalePtr->fromValue) |
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/ tickInterval); |
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maxTicks = (double) Tk_Height(tkwin) |
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/ (double) scalePtr->fontHeight; |
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if (ticks > maxTicks) { |
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tickInterval *= (ticks / maxTicks); |
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} |
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for (tickValue = scalePtr->fromValue; ; |
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tickValue += tickInterval) { |
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/* |
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* The TkRoundToResolution call gets rid of accumulated |
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* round-off errors, if any. |
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*/ |
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tickValue = TkRoundToResolution(scalePtr, tickValue); |
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if (scalePtr->toValue >= scalePtr->fromValue) { |
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if (tickValue > scalePtr->toValue) { |
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break; |
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} |
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} else { |
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if (tickValue < scalePtr->toValue) { |
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break; |
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} |
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} |
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DisplayVerticalValue(scalePtr, drawable, tickValue, |
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scalePtr->vertTickRightX); |
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} |
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} |
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} |
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/* |
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* Display the value, if it is desired. |
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*/ |
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if (scalePtr->showValue) { |
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DisplayVerticalValue(scalePtr, drawable, scalePtr->value, |
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scalePtr->vertValueRightX); |
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} |
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/* |
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* Display the trough and the slider. |
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*/ |
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Tk_Draw3DRectangle(tkwin, drawable, |
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scalePtr->bgBorder, scalePtr->vertTroughX, scalePtr->inset, |
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scalePtr->width + 2*scalePtr->borderWidth, |
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Tk_Height(tkwin) - 2*scalePtr->inset, scalePtr->borderWidth, |
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TK_RELIEF_SUNKEN); |
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XFillRectangle(scalePtr->display, drawable, scalePtr->troughGC, |
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scalePtr->vertTroughX + scalePtr->borderWidth, |
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scalePtr->inset + scalePtr->borderWidth, |
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(unsigned) scalePtr->width, |
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(unsigned) (Tk_Height(tkwin) - 2*scalePtr->inset |
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- 2*scalePtr->borderWidth)); |
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if (scalePtr->state == STATE_ACTIVE) { |
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sliderBorder = scalePtr->activeBorder; |
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} else { |
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sliderBorder = scalePtr->bgBorder; |
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} |
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width = scalePtr->width; |
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height = scalePtr->sliderLength/2; |
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x = scalePtr->vertTroughX + scalePtr->borderWidth; |
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y = TkScaleValueToPixel(scalePtr, scalePtr->value) - height; |
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shadowWidth = scalePtr->borderWidth/2; |
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if (shadowWidth == 0) { |
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shadowWidth = 1; |
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} |
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Tk_Draw3DRectangle(tkwin, drawable, sliderBorder, x, y, width, |
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2*height, shadowWidth, scalePtr->sliderRelief); |
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x += shadowWidth; |
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y += shadowWidth; |
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width -= 2*shadowWidth; |
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height -= shadowWidth; |
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Tk_Fill3DRectangle(tkwin, drawable, sliderBorder, x, y, width, |
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height, shadowWidth, scalePtr->sliderRelief); |
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Tk_Fill3DRectangle(tkwin, drawable, sliderBorder, x, y+height, |
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width, height, shadowWidth, scalePtr->sliderRelief); |
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/* |
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* Draw the label to the right of the scale. |
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*/ |
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if ((scalePtr->flags & REDRAW_OTHER) && (scalePtr->labelLength != 0)) { |
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Tk_FontMetrics fm; |
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Tk_GetFontMetrics(scalePtr->tkfont, &fm); |
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Tk_DrawChars(scalePtr->display, drawable, scalePtr->textGC, |
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scalePtr->tkfont, scalePtr->label, |
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scalePtr->labelLength, scalePtr->vertLabelX, |
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scalePtr->inset + (3*fm.ascent)/2); |
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} |
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} |
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/* |
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*---------------------------------------------------------------------- |
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* |
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* DisplayVerticalValue -- |
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* |
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* This procedure is called to display values (scale readings) |
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* for vertically-oriented scales. |
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* |
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* Results: |
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* None. |
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* |
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* Side effects: |
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* The numerical value corresponding to value is displayed with |
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* its right edge at "rightEdge", and at a vertical position in |
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* the scale that corresponds to "value". |
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* |
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*---------------------------------------------------------------------- |
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*/ |
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static void |
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DisplayVerticalValue(scalePtr, drawable, value, rightEdge) |
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register TkScale *scalePtr; /* Information about widget in which to |
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* display value. */ |
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Drawable drawable; /* Pixmap or window in which to draw |
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* the value. */ |
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double value; /* Y-coordinate of number to display, |
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* specified in application coords, not |
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* in pixels (we'll compute pixels). */ |
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int rightEdge; /* X-coordinate of right edge of text, |
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* specified in pixels. */ |
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{ |
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register Tk_Window tkwin = scalePtr->tkwin; |
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int y, width, length; |
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char valueString[PRINT_CHARS]; |
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Tk_FontMetrics fm; |
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Tk_GetFontMetrics(scalePtr->tkfont, &fm); |
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y = TkScaleValueToPixel(scalePtr, value) + fm.ascent/2; |
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sprintf(valueString, scalePtr->format, value); |
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length = strlen(valueString); |
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width = Tk_TextWidth(scalePtr->tkfont, valueString, length); |
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/* |
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* Adjust the y-coordinate if necessary to keep the text entirely |
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* inside the window. |
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*/ |
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if ((y - fm.ascent) < (scalePtr->inset + SPACING)) { |
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y = scalePtr->inset + SPACING + fm.ascent; |
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} |
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if ((y + fm.descent) > (Tk_Height(tkwin) - scalePtr->inset - SPACING)) { |
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y = Tk_Height(tkwin) - scalePtr->inset - SPACING - fm.descent; |
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} |
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Tk_DrawChars(scalePtr->display, drawable, scalePtr->textGC, |
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scalePtr->tkfont, valueString, length, rightEdge - width, y); |
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} |
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/* |
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*-------------------------------------------------------------- |
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* |
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* DisplayHorizontalScale -- |
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* |
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* This procedure redraws the contents of a horizontal scale |
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* window. It is invoked as a do-when-idle handler, so it only |
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* runs when there's nothing else for the application to do. |
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* |
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* Results: |
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* There is no return value. If only a part of the scale needs |
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* to be redrawn, then drawnAreaPtr is modified to reflect the |
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* area that was actually modified. |
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* |
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* Side effects: |
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* Information appears on the screen. |
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* |
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*-------------------------------------------------------------- |
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*/ |
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static void |
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DisplayHorizontalScale(scalePtr, drawable, drawnAreaPtr) |
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TkScale *scalePtr; /* Widget record for scale. */ |
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Drawable drawable; /* Where to display scale (window |
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* or pixmap). */ |
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XRectangle *drawnAreaPtr; /* Initally contains area of window; |
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* if only a part of the scale is |
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* redrawn, gets modified to reflect |
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* the part of the window that was |
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* redrawn. */ |
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{ |
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register Tk_Window tkwin = scalePtr->tkwin; |
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int x, y, width, height, shadowWidth; |
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double tickValue, tickInterval = scalePtr->tickInterval; |
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Tk_3DBorder sliderBorder; |
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/* |
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* Display the information from bottom to top across the window. |
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*/ |
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if (!(scalePtr->flags & REDRAW_OTHER)) { |
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drawnAreaPtr->x = scalePtr->inset; |
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drawnAreaPtr->y = scalePtr->horizValueY; |
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drawnAreaPtr->width -= 2*scalePtr->inset; |
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drawnAreaPtr->height = scalePtr->horizTroughY + scalePtr->width |
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+ 2*scalePtr->borderWidth - scalePtr->horizValueY; |
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} |
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Tk_Fill3DRectangle(tkwin, drawable, scalePtr->bgBorder, |
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drawnAreaPtr->x, drawnAreaPtr->y, drawnAreaPtr->width, |
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drawnAreaPtr->height, 0, TK_RELIEF_FLAT); |
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if (scalePtr->flags & REDRAW_OTHER) { |
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/* |
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* Display the tick marks. |
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*/ |
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if (tickInterval != 0) { |
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char valueString[PRINT_CHARS]; |
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double ticks, maxTicks; |
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/* |
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* Ensure that we will only draw enough of the tick values |
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* such that they don't overlap. We base this off the width that |
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* fromValue would take. Not exact, but better than no constraint. |
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*/ |
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ticks = fabs((scalePtr->toValue - scalePtr->fromValue) |
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/ tickInterval); |
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sprintf(valueString, scalePtr->format, scalePtr->fromValue); |
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maxTicks = (double) Tk_Width(tkwin) |
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/ (double) Tk_TextWidth(scalePtr->tkfont, valueString, -1); |
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if (ticks > maxTicks) { |
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tickInterval *= (ticks / maxTicks); |
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} |
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for (tickValue = scalePtr->fromValue; ; |
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tickValue += tickInterval) { |
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/* |
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* The TkRoundToResolution call gets rid of accumulated |
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* round-off errors, if any. |
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*/ |
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tickValue = TkRoundToResolution(scalePtr, tickValue); |
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if (scalePtr->toValue >= scalePtr->fromValue) { |
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if (tickValue > scalePtr->toValue) { |
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break; |
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} |
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} else { |
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if (tickValue < scalePtr->toValue) { |
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break; |
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} |
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} |
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DisplayHorizontalValue(scalePtr, drawable, tickValue, |
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scalePtr->horizTickY); |
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} |
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} |
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} |
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/* |
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* Display the value, if it is desired. |
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*/ |
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if (scalePtr->showValue) { |
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DisplayHorizontalValue(scalePtr, drawable, scalePtr->value, |
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scalePtr->horizValueY); |
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} |
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/* |
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* Display the trough and the slider. |
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*/ |
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y = scalePtr->horizTroughY; |
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Tk_Draw3DRectangle(tkwin, drawable, |
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scalePtr->bgBorder, scalePtr->inset, y, |
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Tk_Width(tkwin) - 2*scalePtr->inset, |
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scalePtr->width + 2*scalePtr->borderWidth, |
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scalePtr->borderWidth, TK_RELIEF_SUNKEN); |
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XFillRectangle(scalePtr->display, drawable, scalePtr->troughGC, |
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scalePtr->inset + scalePtr->borderWidth, |
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y + scalePtr->borderWidth, |
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(unsigned) (Tk_Width(tkwin) - 2*scalePtr->inset |
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- 2*scalePtr->borderWidth), |
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(unsigned) scalePtr->width); |
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if (scalePtr->state == STATE_ACTIVE) { |
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sliderBorder = scalePtr->activeBorder; |
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} else { |
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sliderBorder = scalePtr->bgBorder; |
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} |
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width = scalePtr->sliderLength/2; |
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height = scalePtr->width; |
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x = TkScaleValueToPixel(scalePtr, scalePtr->value) - width; |
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y += scalePtr->borderWidth; |
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shadowWidth = scalePtr->borderWidth/2; |
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if (shadowWidth == 0) { |
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shadowWidth = 1; |
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} |
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Tk_Draw3DRectangle(tkwin, drawable, sliderBorder, |
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x, y, 2*width, height, shadowWidth, scalePtr->sliderRelief); |
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x += shadowWidth; |
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y += shadowWidth; |
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width -= shadowWidth; |
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height -= 2*shadowWidth; |
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Tk_Fill3DRectangle(tkwin, drawable, sliderBorder, x, y, width, height, |
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shadowWidth, scalePtr->sliderRelief); |
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Tk_Fill3DRectangle(tkwin, drawable, sliderBorder, x+width, y, |
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width, height, shadowWidth, scalePtr->sliderRelief); |
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|
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/* |
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* Draw the label at the top of the scale. |
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*/ |
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|
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if ((scalePtr->flags & REDRAW_OTHER) && (scalePtr->labelLength != 0)) { |
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Tk_FontMetrics fm; |
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Tk_GetFontMetrics(scalePtr->tkfont, &fm); |
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Tk_DrawChars(scalePtr->display, drawable, scalePtr->textGC, |
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scalePtr->tkfont, scalePtr->label, |
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scalePtr->labelLength, scalePtr->inset + fm.ascent/2, |
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scalePtr->horizLabelY + fm.ascent); |
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} |
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} |
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|
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/* |
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|
*---------------------------------------------------------------------- |
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|
* |
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|
* DisplayHorizontalValue -- |
|
|
* |
|
|
* This procedure is called to display values (scale readings) |
|
|
* for horizontally-oriented scales. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* The numerical value corresponding to value is displayed with |
|
|
* its bottom edge at "bottom", and at a horizontal position in |
|
|
* the scale that corresponds to "value". |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
DisplayHorizontalValue(scalePtr, drawable, value, top) |
|
|
register TkScale *scalePtr; /* Information about widget in which to |
|
|
* display value. */ |
|
|
Drawable drawable; /* Pixmap or window in which to draw |
|
|
* the value. */ |
|
|
double value; /* X-coordinate of number to display, |
|
|
* specified in application coords, not |
|
|
* in pixels (we'll compute pixels). */ |
|
|
int top; /* Y-coordinate of top edge of text, |
|
|
* specified in pixels. */ |
|
|
{ |
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register Tk_Window tkwin = scalePtr->tkwin; |
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|
int x, y, length, width; |
|
|
char valueString[PRINT_CHARS]; |
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|
Tk_FontMetrics fm; |
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|
|
|
x = TkScaleValueToPixel(scalePtr, value); |
|
|
Tk_GetFontMetrics(scalePtr->tkfont, &fm); |
|
|
y = top + fm.ascent; |
|
|
sprintf(valueString, scalePtr->format, value); |
|
|
length = strlen(valueString); |
|
|
width = Tk_TextWidth(scalePtr->tkfont, valueString, length); |
|
|
|
|
|
/* |
|
|
* Adjust the x-coordinate if necessary to keep the text entirely |
|
|
* inside the window. |
|
|
*/ |
|
|
|
|
|
x -= (width)/2; |
|
|
if (x < (scalePtr->inset + SPACING)) { |
|
|
x = scalePtr->inset + SPACING; |
|
|
} |
|
|
if (x > (Tk_Width(tkwin) - scalePtr->inset)) { |
|
|
x = Tk_Width(tkwin) - scalePtr->inset - SPACING - width; |
|
|
} |
|
|
Tk_DrawChars(scalePtr->display, drawable, scalePtr->textGC, |
|
|
scalePtr->tkfont, valueString, length, x, y); |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TkpDisplayScale -- |
|
|
* |
|
|
* This procedure is invoked as an idle handler to redisplay |
|
|
* the contents of a scale widget. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* The scale gets redisplayed. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
void |
|
|
TkpDisplayScale(clientData) |
|
|
ClientData clientData; /* Widget record for scale. */ |
|
|
{ |
|
|
TkScale *scalePtr = (TkScale *) clientData; |
|
|
Tk_Window tkwin = scalePtr->tkwin; |
|
|
Tcl_Interp *interp = scalePtr->interp; |
|
|
Pixmap pixmap; |
|
|
int result; |
|
|
char string[PRINT_CHARS]; |
|
|
XRectangle drawnArea; |
|
|
|
|
|
scalePtr->flags &= ~REDRAW_PENDING; |
|
|
if ((scalePtr->tkwin == NULL) || !Tk_IsMapped(scalePtr->tkwin)) { |
|
|
goto done; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Invoke the scale's command if needed. |
|
|
*/ |
|
|
Tcl_Preserve((ClientData) scalePtr); |
|
|
if ((scalePtr->flags & INVOKE_COMMAND) && (scalePtr->command != NULL)) { |
|
|
Tcl_Preserve((ClientData) interp); |
|
|
sprintf(string, scalePtr->format, scalePtr->value); |
|
|
result = Tcl_VarEval(interp, scalePtr->command, " ", string, |
|
|
(char *) NULL); |
|
|
if (result != TCL_OK) { |
|
|
Tcl_AddErrorInfo(interp, "\n (command executed by scale)"); |
|
|
Tcl_BackgroundError(interp); |
|
|
} |
|
|
Tcl_Release((ClientData) interp); |
|
|
} |
|
|
scalePtr->flags &= ~INVOKE_COMMAND; |
|
|
if (scalePtr->flags & SCALE_DELETED) { |
|
|
Tcl_Release((ClientData) scalePtr); |
|
|
goto done; |
|
|
} |
|
|
Tcl_Release((ClientData) scalePtr); |
|
|
|
|
|
/* |
|
|
* In order to avoid screen flashes, this procedure redraws |
|
|
* the scale in a pixmap, then copies the pixmap to the |
|
|
* screen in a single operation. This means that there's no |
|
|
* point in time where the on-sreen image has been cleared. |
|
|
*/ |
|
|
|
|
|
pixmap = Tk_GetPixmap(scalePtr->display, Tk_WindowId(tkwin), |
|
|
Tk_Width(tkwin), Tk_Height(tkwin), Tk_Depth(tkwin)); |
|
|
drawnArea.x = 0; |
|
|
drawnArea.y = 0; |
|
|
drawnArea.width = Tk_Width(tkwin); |
|
|
drawnArea.height = Tk_Height(tkwin); |
|
|
|
|
|
/* |
|
|
* Much of the redisplay is done totally differently for |
|
|
* horizontal and vertical scales. Handle the part that's |
|
|
* different. |
|
|
*/ |
|
|
|
|
|
if (scalePtr->orient == ORIENT_VERTICAL) { |
|
|
DisplayVerticalScale(scalePtr, pixmap, &drawnArea); |
|
|
} else { |
|
|
DisplayHorizontalScale(scalePtr, pixmap, &drawnArea); |
|
|
} |
|
|
|
|
|
/* |
|
|
* Now handle the part of redisplay that is the same for |
|
|
* horizontal and vertical scales: border and traversal |
|
|
* highlight. |
|
|
*/ |
|
|
|
|
|
if (scalePtr->flags & REDRAW_OTHER) { |
|
|
if (scalePtr->relief != TK_RELIEF_FLAT) { |
|
|
Tk_Draw3DRectangle(tkwin, pixmap, scalePtr->bgBorder, |
|
|
scalePtr->highlightWidth, scalePtr->highlightWidth, |
|
|
Tk_Width(tkwin) - 2*scalePtr->highlightWidth, |
|
|
Tk_Height(tkwin) - 2*scalePtr->highlightWidth, |
|
|
scalePtr->borderWidth, scalePtr->relief); |
|
|
} |
|
|
if (scalePtr->highlightWidth != 0) { |
|
|
GC gc; |
|
|
|
|
|
if (scalePtr->flags & GOT_FOCUS) { |
|
|
gc = Tk_GCForColor(scalePtr->highlightColorPtr, pixmap); |
|
|
} else { |
|
|
gc = Tk_GCForColor( |
|
|
Tk_3DBorderColor(scalePtr->highlightBorder), pixmap); |
|
|
} |
|
|
Tk_DrawFocusHighlight(tkwin, gc, scalePtr->highlightWidth, pixmap); |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Copy the information from the off-screen pixmap onto the screen, |
|
|
* then delete the pixmap. |
|
|
*/ |
|
|
|
|
|
XCopyArea(scalePtr->display, pixmap, Tk_WindowId(tkwin), |
|
|
scalePtr->copyGC, drawnArea.x, drawnArea.y, drawnArea.width, |
|
|
drawnArea.height, drawnArea.x, drawnArea.y); |
|
|
Tk_FreePixmap(scalePtr->display, pixmap); |
|
|
|
|
|
done: |
|
|
scalePtr->flags &= ~REDRAW_ALL; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TkpScaleElement -- |
|
|
* |
|
|
* Determine which part of a scale widget lies under a given |
|
|
* point. |
|
|
* |
|
|
* Results: |
|
|
* The return value is either TROUGH1, SLIDER, TROUGH2, or |
|
|
* OTHER, depending on which of the scale's active elements |
|
|
* (if any) is under the point at (x,y). |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
int |
|
|
TkpScaleElement(scalePtr, x, y) |
|
|
TkScale *scalePtr; /* Widget record for scale. */ |
|
|
int x, y; /* Coordinates within scalePtr's window. */ |
|
|
{ |
|
|
int sliderFirst; |
|
|
|
|
|
if (scalePtr->orient == ORIENT_VERTICAL) { |
|
|
if ((x < scalePtr->vertTroughX) |
|
|
|| (x >= (scalePtr->vertTroughX + 2*scalePtr->borderWidth + |
|
|
scalePtr->width))) { |
|
|
return OTHER; |
|
|
} |
|
|
if ((y < scalePtr->inset) |
|
|
|| (y >= (Tk_Height(scalePtr->tkwin) - scalePtr->inset))) { |
|
|
return OTHER; |
|
|
} |
|
|
sliderFirst = TkScaleValueToPixel(scalePtr, scalePtr->value) |
|
|
- scalePtr->sliderLength/2; |
|
|
if (y < sliderFirst) { |
|
|
return TROUGH1; |
|
|
} |
|
|
if (y < (sliderFirst+scalePtr->sliderLength)) { |
|
|
return SLIDER; |
|
|
} |
|
|
return TROUGH2; |
|
|
} |
|
|
|
|
|
if ((y < scalePtr->horizTroughY) |
|
|
|| (y >= (scalePtr->horizTroughY + 2*scalePtr->borderWidth + |
|
|
scalePtr->width))) { |
|
|
return OTHER; |
|
|
} |
|
|
if ((x < scalePtr->inset) |
|
|
|| (x >= (Tk_Width(scalePtr->tkwin) - scalePtr->inset))) { |
|
|
return OTHER; |
|
|
} |
|
|
sliderFirst = TkScaleValueToPixel(scalePtr, scalePtr->value) |
|
|
- scalePtr->sliderLength/2; |
|
|
if (x < sliderFirst) { |
|
|
return TROUGH1; |
|
|
} |
|
|
if (x < (sliderFirst+scalePtr->sliderLength)) { |
|
|
return SLIDER; |
|
|
} |
|
|
return TROUGH2; |
|
|
} |
|
|
|
|
|
|
|
|
/* $History: tkUnixScale.c $ |
|
|
* |
|
|
* ***************** Version 1 ***************** |
|
|
* User: Dtashley Date: 1/02/01 Time: 3:13a |
|
|
* Created in $/IjuScripter, IjuConsole/Source/Tk Base |
|
|
* Initial check-in. |
|
|
*/ |
|
|
|
|
|
/* End of TKUNIXSCALE.C */ |
|
| 1 |
|
/* $Header$ */ |
| 2 |
|
|
| 3 |
|
/* |
| 4 |
|
* tkUnixScale.c -- |
| 5 |
|
* |
| 6 |
|
* This file implements the X specific portion of the scrollbar |
| 7 |
|
* widget. |
| 8 |
|
* |
| 9 |
|
* Copyright (c) 1996 by Sun Microsystems, Inc. |
| 10 |
|
* Copyright (c) 1998-2000 by Scriptics Corporation. |
| 11 |
|
* |
| 12 |
|
* See the file "license.terms" for information on usage and redistribution |
| 13 |
|
* of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
| 14 |
|
* |
| 15 |
|
* RCS: @(#) $Id: tkunixscale.c,v 1.1.1.1 2001/06/13 05:11:27 dtashley Exp $ |
| 16 |
|
*/ |
| 17 |
|
|
| 18 |
|
#include "tkScale.h" |
| 19 |
|
#include "tkInt.h" |
| 20 |
|
|
| 21 |
|
/* |
| 22 |
|
* Forward declarations for procedures defined later in this file: |
| 23 |
|
*/ |
| 24 |
|
|
| 25 |
|
static void DisplayHorizontalScale _ANSI_ARGS_((TkScale *scalePtr, |
| 26 |
|
Drawable drawable, XRectangle *drawnAreaPtr)); |
| 27 |
|
static void DisplayHorizontalValue _ANSI_ARGS_((TkScale *scalePtr, |
| 28 |
|
Drawable drawable, double value, int top)); |
| 29 |
|
static void DisplayVerticalScale _ANSI_ARGS_((TkScale *scalePtr, |
| 30 |
|
Drawable drawable, XRectangle *drawnAreaPtr)); |
| 31 |
|
static void DisplayVerticalValue _ANSI_ARGS_((TkScale *scalePtr, |
| 32 |
|
Drawable drawable, double value, int rightEdge)); |
| 33 |
|
|
| 34 |
|
/* |
| 35 |
|
*---------------------------------------------------------------------- |
| 36 |
|
* |
| 37 |
|
* TkpCreateScale -- |
| 38 |
|
* |
| 39 |
|
* Allocate a new TkScale structure. |
| 40 |
|
* |
| 41 |
|
* Results: |
| 42 |
|
* Returns a newly allocated TkScale structure. |
| 43 |
|
* |
| 44 |
|
* Side effects: |
| 45 |
|
* None. |
| 46 |
|
* |
| 47 |
|
*---------------------------------------------------------------------- |
| 48 |
|
*/ |
| 49 |
|
|
| 50 |
|
TkScale * |
| 51 |
|
TkpCreateScale(tkwin) |
| 52 |
|
Tk_Window tkwin; |
| 53 |
|
{ |
| 54 |
|
return (TkScale *) ckalloc(sizeof(TkScale)); |
| 55 |
|
} |
| 56 |
|
|
| 57 |
|
/* |
| 58 |
|
*---------------------------------------------------------------------- |
| 59 |
|
* |
| 60 |
|
* TkpDestroyScale -- |
| 61 |
|
* |
| 62 |
|
* Destroy a TkScale structure. It's necessary to do this with |
| 63 |
|
* Tcl_EventuallyFree to allow the Tcl_Preserve(scalePtr) to work |
| 64 |
|
* as expected in TkpDisplayScale. (hobbs) |
| 65 |
|
* |
| 66 |
|
* Results: |
| 67 |
|
* None |
| 68 |
|
* |
| 69 |
|
* Side effects: |
| 70 |
|
* Memory is freed. |
| 71 |
|
* |
| 72 |
|
*---------------------------------------------------------------------- |
| 73 |
|
*/ |
| 74 |
|
|
| 75 |
|
void |
| 76 |
|
TkpDestroyScale(scalePtr) |
| 77 |
|
TkScale *scalePtr; |
| 78 |
|
{ |
| 79 |
|
Tcl_EventuallyFree((ClientData) scalePtr, TCL_DYNAMIC); |
| 80 |
|
} |
| 81 |
|
|
| 82 |
|
/* |
| 83 |
|
*-------------------------------------------------------------- |
| 84 |
|
* |
| 85 |
|
* DisplayVerticalScale -- |
| 86 |
|
* |
| 87 |
|
* This procedure redraws the contents of a vertical scale |
| 88 |
|
* window. It is invoked as a do-when-idle handler, so it only |
| 89 |
|
* runs when there's nothing else for the application to do. |
| 90 |
|
* |
| 91 |
|
* Results: |
| 92 |
|
* There is no return value. If only a part of the scale needs |
| 93 |
|
* to be redrawn, then drawnAreaPtr is modified to reflect the |
| 94 |
|
* area that was actually modified. |
| 95 |
|
* |
| 96 |
|
* Side effects: |
| 97 |
|
* Information appears on the screen. |
| 98 |
|
* |
| 99 |
|
*-------------------------------------------------------------- |
| 100 |
|
*/ |
| 101 |
|
|
| 102 |
|
static void |
| 103 |
|
DisplayVerticalScale(scalePtr, drawable, drawnAreaPtr) |
| 104 |
|
TkScale *scalePtr; /* Widget record for scale. */ |
| 105 |
|
Drawable drawable; /* Where to display scale (window |
| 106 |
|
* or pixmap). */ |
| 107 |
|
XRectangle *drawnAreaPtr; /* Initally contains area of window; |
| 108 |
|
* if only a part of the scale is |
| 109 |
|
* redrawn, gets modified to reflect |
| 110 |
|
* the part of the window that was |
| 111 |
|
* redrawn. */ |
| 112 |
|
{ |
| 113 |
|
Tk_Window tkwin = scalePtr->tkwin; |
| 114 |
|
int x, y, width, height, shadowWidth; |
| 115 |
|
double tickValue, tickInterval = scalePtr->tickInterval; |
| 116 |
|
Tk_3DBorder sliderBorder; |
| 117 |
|
|
| 118 |
|
/* |
| 119 |
|
* Display the information from left to right across the window. |
| 120 |
|
*/ |
| 121 |
|
|
| 122 |
|
if (!(scalePtr->flags & REDRAW_OTHER)) { |
| 123 |
|
drawnAreaPtr->x = scalePtr->vertTickRightX; |
| 124 |
|
drawnAreaPtr->y = scalePtr->inset; |
| 125 |
|
drawnAreaPtr->width = scalePtr->vertTroughX + scalePtr->width |
| 126 |
|
+ 2*scalePtr->borderWidth - scalePtr->vertTickRightX; |
| 127 |
|
drawnAreaPtr->height -= 2*scalePtr->inset; |
| 128 |
|
} |
| 129 |
|
Tk_Fill3DRectangle(tkwin, drawable, scalePtr->bgBorder, |
| 130 |
|
drawnAreaPtr->x, drawnAreaPtr->y, drawnAreaPtr->width, |
| 131 |
|
drawnAreaPtr->height, 0, TK_RELIEF_FLAT); |
| 132 |
|
if (scalePtr->flags & REDRAW_OTHER) { |
| 133 |
|
/* |
| 134 |
|
* Display the tick marks. |
| 135 |
|
*/ |
| 136 |
|
|
| 137 |
|
if (tickInterval != 0) { |
| 138 |
|
double ticks, maxTicks; |
| 139 |
|
|
| 140 |
|
/* |
| 141 |
|
* Ensure that we will only draw enough of the tick values |
| 142 |
|
* such that they don't overlap |
| 143 |
|
*/ |
| 144 |
|
ticks = fabs((scalePtr->toValue - scalePtr->fromValue) |
| 145 |
|
/ tickInterval); |
| 146 |
|
maxTicks = (double) Tk_Height(tkwin) |
| 147 |
|
/ (double) scalePtr->fontHeight; |
| 148 |
|
if (ticks > maxTicks) { |
| 149 |
|
tickInterval *= (ticks / maxTicks); |
| 150 |
|
} |
| 151 |
|
for (tickValue = scalePtr->fromValue; ; |
| 152 |
|
tickValue += tickInterval) { |
| 153 |
|
/* |
| 154 |
|
* The TkRoundToResolution call gets rid of accumulated |
| 155 |
|
* round-off errors, if any. |
| 156 |
|
*/ |
| 157 |
|
|
| 158 |
|
tickValue = TkRoundToResolution(scalePtr, tickValue); |
| 159 |
|
if (scalePtr->toValue >= scalePtr->fromValue) { |
| 160 |
|
if (tickValue > scalePtr->toValue) { |
| 161 |
|
break; |
| 162 |
|
} |
| 163 |
|
} else { |
| 164 |
|
if (tickValue < scalePtr->toValue) { |
| 165 |
|
break; |
| 166 |
|
} |
| 167 |
|
} |
| 168 |
|
DisplayVerticalValue(scalePtr, drawable, tickValue, |
| 169 |
|
scalePtr->vertTickRightX); |
| 170 |
|
} |
| 171 |
|
} |
| 172 |
|
} |
| 173 |
|
|
| 174 |
|
/* |
| 175 |
|
* Display the value, if it is desired. |
| 176 |
|
*/ |
| 177 |
|
|
| 178 |
|
if (scalePtr->showValue) { |
| 179 |
|
DisplayVerticalValue(scalePtr, drawable, scalePtr->value, |
| 180 |
|
scalePtr->vertValueRightX); |
| 181 |
|
} |
| 182 |
|
|
| 183 |
|
/* |
| 184 |
|
* Display the trough and the slider. |
| 185 |
|
*/ |
| 186 |
|
|
| 187 |
|
Tk_Draw3DRectangle(tkwin, drawable, |
| 188 |
|
scalePtr->bgBorder, scalePtr->vertTroughX, scalePtr->inset, |
| 189 |
|
scalePtr->width + 2*scalePtr->borderWidth, |
| 190 |
|
Tk_Height(tkwin) - 2*scalePtr->inset, scalePtr->borderWidth, |
| 191 |
|
TK_RELIEF_SUNKEN); |
| 192 |
|
XFillRectangle(scalePtr->display, drawable, scalePtr->troughGC, |
| 193 |
|
scalePtr->vertTroughX + scalePtr->borderWidth, |
| 194 |
|
scalePtr->inset + scalePtr->borderWidth, |
| 195 |
|
(unsigned) scalePtr->width, |
| 196 |
|
(unsigned) (Tk_Height(tkwin) - 2*scalePtr->inset |
| 197 |
|
- 2*scalePtr->borderWidth)); |
| 198 |
|
if (scalePtr->state == STATE_ACTIVE) { |
| 199 |
|
sliderBorder = scalePtr->activeBorder; |
| 200 |
|
} else { |
| 201 |
|
sliderBorder = scalePtr->bgBorder; |
| 202 |
|
} |
| 203 |
|
width = scalePtr->width; |
| 204 |
|
height = scalePtr->sliderLength/2; |
| 205 |
|
x = scalePtr->vertTroughX + scalePtr->borderWidth; |
| 206 |
|
y = TkScaleValueToPixel(scalePtr, scalePtr->value) - height; |
| 207 |
|
shadowWidth = scalePtr->borderWidth/2; |
| 208 |
|
if (shadowWidth == 0) { |
| 209 |
|
shadowWidth = 1; |
| 210 |
|
} |
| 211 |
|
Tk_Draw3DRectangle(tkwin, drawable, sliderBorder, x, y, width, |
| 212 |
|
2*height, shadowWidth, scalePtr->sliderRelief); |
| 213 |
|
x += shadowWidth; |
| 214 |
|
y += shadowWidth; |
| 215 |
|
width -= 2*shadowWidth; |
| 216 |
|
height -= shadowWidth; |
| 217 |
|
Tk_Fill3DRectangle(tkwin, drawable, sliderBorder, x, y, width, |
| 218 |
|
height, shadowWidth, scalePtr->sliderRelief); |
| 219 |
|
Tk_Fill3DRectangle(tkwin, drawable, sliderBorder, x, y+height, |
| 220 |
|
width, height, shadowWidth, scalePtr->sliderRelief); |
| 221 |
|
|
| 222 |
|
/* |
| 223 |
|
* Draw the label to the right of the scale. |
| 224 |
|
*/ |
| 225 |
|
|
| 226 |
|
if ((scalePtr->flags & REDRAW_OTHER) && (scalePtr->labelLength != 0)) { |
| 227 |
|
Tk_FontMetrics fm; |
| 228 |
|
|
| 229 |
|
Tk_GetFontMetrics(scalePtr->tkfont, &fm); |
| 230 |
|
Tk_DrawChars(scalePtr->display, drawable, scalePtr->textGC, |
| 231 |
|
scalePtr->tkfont, scalePtr->label, |
| 232 |
|
scalePtr->labelLength, scalePtr->vertLabelX, |
| 233 |
|
scalePtr->inset + (3*fm.ascent)/2); |
| 234 |
|
} |
| 235 |
|
} |
| 236 |
|
|
| 237 |
|
/* |
| 238 |
|
*---------------------------------------------------------------------- |
| 239 |
|
* |
| 240 |
|
* DisplayVerticalValue -- |
| 241 |
|
* |
| 242 |
|
* This procedure is called to display values (scale readings) |
| 243 |
|
* for vertically-oriented scales. |
| 244 |
|
* |
| 245 |
|
* Results: |
| 246 |
|
* None. |
| 247 |
|
* |
| 248 |
|
* Side effects: |
| 249 |
|
* The numerical value corresponding to value is displayed with |
| 250 |
|
* its right edge at "rightEdge", and at a vertical position in |
| 251 |
|
* the scale that corresponds to "value". |
| 252 |
|
* |
| 253 |
|
*---------------------------------------------------------------------- |
| 254 |
|
*/ |
| 255 |
|
|
| 256 |
|
static void |
| 257 |
|
DisplayVerticalValue(scalePtr, drawable, value, rightEdge) |
| 258 |
|
register TkScale *scalePtr; /* Information about widget in which to |
| 259 |
|
* display value. */ |
| 260 |
|
Drawable drawable; /* Pixmap or window in which to draw |
| 261 |
|
* the value. */ |
| 262 |
|
double value; /* Y-coordinate of number to display, |
| 263 |
|
* specified in application coords, not |
| 264 |
|
* in pixels (we'll compute pixels). */ |
| 265 |
|
int rightEdge; /* X-coordinate of right edge of text, |
| 266 |
|
* specified in pixels. */ |
| 267 |
|
{ |
| 268 |
|
register Tk_Window tkwin = scalePtr->tkwin; |
| 269 |
|
int y, width, length; |
| 270 |
|
char valueString[PRINT_CHARS]; |
| 271 |
|
Tk_FontMetrics fm; |
| 272 |
|
|
| 273 |
|
Tk_GetFontMetrics(scalePtr->tkfont, &fm); |
| 274 |
|
y = TkScaleValueToPixel(scalePtr, value) + fm.ascent/2; |
| 275 |
|
sprintf(valueString, scalePtr->format, value); |
| 276 |
|
length = strlen(valueString); |
| 277 |
|
width = Tk_TextWidth(scalePtr->tkfont, valueString, length); |
| 278 |
|
|
| 279 |
|
/* |
| 280 |
|
* Adjust the y-coordinate if necessary to keep the text entirely |
| 281 |
|
* inside the window. |
| 282 |
|
*/ |
| 283 |
|
|
| 284 |
|
if ((y - fm.ascent) < (scalePtr->inset + SPACING)) { |
| 285 |
|
y = scalePtr->inset + SPACING + fm.ascent; |
| 286 |
|
} |
| 287 |
|
if ((y + fm.descent) > (Tk_Height(tkwin) - scalePtr->inset - SPACING)) { |
| 288 |
|
y = Tk_Height(tkwin) - scalePtr->inset - SPACING - fm.descent; |
| 289 |
|
} |
| 290 |
|
Tk_DrawChars(scalePtr->display, drawable, scalePtr->textGC, |
| 291 |
|
scalePtr->tkfont, valueString, length, rightEdge - width, y); |
| 292 |
|
} |
| 293 |
|
|
| 294 |
|
/* |
| 295 |
|
*-------------------------------------------------------------- |
| 296 |
|
* |
| 297 |
|
* DisplayHorizontalScale -- |
| 298 |
|
* |
| 299 |
|
* This procedure redraws the contents of a horizontal scale |
| 300 |
|
* window. It is invoked as a do-when-idle handler, so it only |
| 301 |
|
* runs when there's nothing else for the application to do. |
| 302 |
|
* |
| 303 |
|
* Results: |
| 304 |
|
* There is no return value. If only a part of the scale needs |
| 305 |
|
* to be redrawn, then drawnAreaPtr is modified to reflect the |
| 306 |
|
* area that was actually modified. |
| 307 |
|
* |
| 308 |
|
* Side effects: |
| 309 |
|
* Information appears on the screen. |
| 310 |
|
* |
| 311 |
|
*-------------------------------------------------------------- |
| 312 |
|
*/ |
| 313 |
|
|
| 314 |
|
static void |
| 315 |
|
DisplayHorizontalScale(scalePtr, drawable, drawnAreaPtr) |
| 316 |
|
TkScale *scalePtr; /* Widget record for scale. */ |
| 317 |
|
Drawable drawable; /* Where to display scale (window |
| 318 |
|
* or pixmap). */ |
| 319 |
|
XRectangle *drawnAreaPtr; /* Initally contains area of window; |
| 320 |
|
* if only a part of the scale is |
| 321 |
|
* redrawn, gets modified to reflect |
| 322 |
|
* the part of the window that was |
| 323 |
|
* redrawn. */ |
| 324 |
|
{ |
| 325 |
|
register Tk_Window tkwin = scalePtr->tkwin; |
| 326 |
|
int x, y, width, height, shadowWidth; |
| 327 |
|
double tickValue, tickInterval = scalePtr->tickInterval; |
| 328 |
|
Tk_3DBorder sliderBorder; |
| 329 |
|
|
| 330 |
|
/* |
| 331 |
|
* Display the information from bottom to top across the window. |
| 332 |
|
*/ |
| 333 |
|
|
| 334 |
|
if (!(scalePtr->flags & REDRAW_OTHER)) { |
| 335 |
|
drawnAreaPtr->x = scalePtr->inset; |
| 336 |
|
drawnAreaPtr->y = scalePtr->horizValueY; |
| 337 |
|
drawnAreaPtr->width -= 2*scalePtr->inset; |
| 338 |
|
drawnAreaPtr->height = scalePtr->horizTroughY + scalePtr->width |
| 339 |
|
+ 2*scalePtr->borderWidth - scalePtr->horizValueY; |
| 340 |
|
} |
| 341 |
|
Tk_Fill3DRectangle(tkwin, drawable, scalePtr->bgBorder, |
| 342 |
|
drawnAreaPtr->x, drawnAreaPtr->y, drawnAreaPtr->width, |
| 343 |
|
drawnAreaPtr->height, 0, TK_RELIEF_FLAT); |
| 344 |
|
if (scalePtr->flags & REDRAW_OTHER) { |
| 345 |
|
/* |
| 346 |
|
* Display the tick marks. |
| 347 |
|
*/ |
| 348 |
|
|
| 349 |
|
if (tickInterval != 0) { |
| 350 |
|
char valueString[PRINT_CHARS]; |
| 351 |
|
double ticks, maxTicks; |
| 352 |
|
|
| 353 |
|
/* |
| 354 |
|
* Ensure that we will only draw enough of the tick values |
| 355 |
|
* such that they don't overlap. We base this off the width that |
| 356 |
|
* fromValue would take. Not exact, but better than no constraint. |
| 357 |
|
*/ |
| 358 |
|
ticks = fabs((scalePtr->toValue - scalePtr->fromValue) |
| 359 |
|
/ tickInterval); |
| 360 |
|
sprintf(valueString, scalePtr->format, scalePtr->fromValue); |
| 361 |
|
maxTicks = (double) Tk_Width(tkwin) |
| 362 |
|
/ (double) Tk_TextWidth(scalePtr->tkfont, valueString, -1); |
| 363 |
|
if (ticks > maxTicks) { |
| 364 |
|
tickInterval *= (ticks / maxTicks); |
| 365 |
|
} |
| 366 |
|
for (tickValue = scalePtr->fromValue; ; |
| 367 |
|
tickValue += tickInterval) { |
| 368 |
|
/* |
| 369 |
|
* The TkRoundToResolution call gets rid of accumulated |
| 370 |
|
* round-off errors, if any. |
| 371 |
|
*/ |
| 372 |
|
|
| 373 |
|
tickValue = TkRoundToResolution(scalePtr, tickValue); |
| 374 |
|
if (scalePtr->toValue >= scalePtr->fromValue) { |
| 375 |
|
if (tickValue > scalePtr->toValue) { |
| 376 |
|
break; |
| 377 |
|
} |
| 378 |
|
} else { |
| 379 |
|
if (tickValue < scalePtr->toValue) { |
| 380 |
|
break; |
| 381 |
|
} |
| 382 |
|
} |
| 383 |
|
DisplayHorizontalValue(scalePtr, drawable, tickValue, |
| 384 |
|
scalePtr->horizTickY); |
| 385 |
|
} |
| 386 |
|
} |
| 387 |
|
} |
| 388 |
|
|
| 389 |
|
/* |
| 390 |
|
* Display the value, if it is desired. |
| 391 |
|
*/ |
| 392 |
|
|
| 393 |
|
if (scalePtr->showValue) { |
| 394 |
|
DisplayHorizontalValue(scalePtr, drawable, scalePtr->value, |
| 395 |
|
scalePtr->horizValueY); |
| 396 |
|
} |
| 397 |
|
|
| 398 |
|
/* |
| 399 |
|
* Display the trough and the slider. |
| 400 |
|
*/ |
| 401 |
|
|
| 402 |
|
y = scalePtr->horizTroughY; |
| 403 |
|
Tk_Draw3DRectangle(tkwin, drawable, |
| 404 |
|
scalePtr->bgBorder, scalePtr->inset, y, |
| 405 |
|
Tk_Width(tkwin) - 2*scalePtr->inset, |
| 406 |
|
scalePtr->width + 2*scalePtr->borderWidth, |
| 407 |
|
scalePtr->borderWidth, TK_RELIEF_SUNKEN); |
| 408 |
|
XFillRectangle(scalePtr->display, drawable, scalePtr->troughGC, |
| 409 |
|
scalePtr->inset + scalePtr->borderWidth, |
| 410 |
|
y + scalePtr->borderWidth, |
| 411 |
|
(unsigned) (Tk_Width(tkwin) - 2*scalePtr->inset |
| 412 |
|
- 2*scalePtr->borderWidth), |
| 413 |
|
(unsigned) scalePtr->width); |
| 414 |
|
if (scalePtr->state == STATE_ACTIVE) { |
| 415 |
|
sliderBorder = scalePtr->activeBorder; |
| 416 |
|
} else { |
| 417 |
|
sliderBorder = scalePtr->bgBorder; |
| 418 |
|
} |
| 419 |
|
width = scalePtr->sliderLength/2; |
| 420 |
|
height = scalePtr->width; |
| 421 |
|
x = TkScaleValueToPixel(scalePtr, scalePtr->value) - width; |
| 422 |
|
y += scalePtr->borderWidth; |
| 423 |
|
shadowWidth = scalePtr->borderWidth/2; |
| 424 |
|
if (shadowWidth == 0) { |
| 425 |
|
shadowWidth = 1; |
| 426 |
|
} |
| 427 |
|
Tk_Draw3DRectangle(tkwin, drawable, sliderBorder, |
| 428 |
|
x, y, 2*width, height, shadowWidth, scalePtr->sliderRelief); |
| 429 |
|
x += shadowWidth; |
| 430 |
|
y += shadowWidth; |
| 431 |
|
width -= shadowWidth; |
| 432 |
|
height -= 2*shadowWidth; |
| 433 |
|
Tk_Fill3DRectangle(tkwin, drawable, sliderBorder, x, y, width, height, |
| 434 |
|
shadowWidth, scalePtr->sliderRelief); |
| 435 |
|
Tk_Fill3DRectangle(tkwin, drawable, sliderBorder, x+width, y, |
| 436 |
|
width, height, shadowWidth, scalePtr->sliderRelief); |
| 437 |
|
|
| 438 |
|
/* |
| 439 |
|
* Draw the label at the top of the scale. |
| 440 |
|
*/ |
| 441 |
|
|
| 442 |
|
if ((scalePtr->flags & REDRAW_OTHER) && (scalePtr->labelLength != 0)) { |
| 443 |
|
Tk_FontMetrics fm; |
| 444 |
|
|
| 445 |
|
Tk_GetFontMetrics(scalePtr->tkfont, &fm); |
| 446 |
|
Tk_DrawChars(scalePtr->display, drawable, scalePtr->textGC, |
| 447 |
|
scalePtr->tkfont, scalePtr->label, |
| 448 |
|
scalePtr->labelLength, scalePtr->inset + fm.ascent/2, |
| 449 |
|
scalePtr->horizLabelY + fm.ascent); |
| 450 |
|
} |
| 451 |
|
} |
| 452 |
|
|
| 453 |
|
/* |
| 454 |
|
*---------------------------------------------------------------------- |
| 455 |
|
* |
| 456 |
|
* DisplayHorizontalValue -- |
| 457 |
|
* |
| 458 |
|
* This procedure is called to display values (scale readings) |
| 459 |
|
* for horizontally-oriented scales. |
| 460 |
|
* |
| 461 |
|
* Results: |
| 462 |
|
* None. |
| 463 |
|
* |
| 464 |
|
* Side effects: |
| 465 |
|
* The numerical value corresponding to value is displayed with |
| 466 |
|
* its bottom edge at "bottom", and at a horizontal position in |
| 467 |
|
* the scale that corresponds to "value". |
| 468 |
|
* |
| 469 |
|
*---------------------------------------------------------------------- |
| 470 |
|
*/ |
| 471 |
|
|
| 472 |
|
static void |
| 473 |
|
DisplayHorizontalValue(scalePtr, drawable, value, top) |
| 474 |
|
register TkScale *scalePtr; /* Information about widget in which to |
| 475 |
|
* display value. */ |
| 476 |
|
Drawable drawable; /* Pixmap or window in which to draw |
| 477 |
|
* the value. */ |
| 478 |
|
double value; /* X-coordinate of number to display, |
| 479 |
|
* specified in application coords, not |
| 480 |
|
* in pixels (we'll compute pixels). */ |
| 481 |
|
int top; /* Y-coordinate of top edge of text, |
| 482 |
|
* specified in pixels. */ |
| 483 |
|
{ |
| 484 |
|
register Tk_Window tkwin = scalePtr->tkwin; |
| 485 |
|
int x, y, length, width; |
| 486 |
|
char valueString[PRINT_CHARS]; |
| 487 |
|
Tk_FontMetrics fm; |
| 488 |
|
|
| 489 |
|
x = TkScaleValueToPixel(scalePtr, value); |
| 490 |
|
Tk_GetFontMetrics(scalePtr->tkfont, &fm); |
| 491 |
|
y = top + fm.ascent; |
| 492 |
|
sprintf(valueString, scalePtr->format, value); |
| 493 |
|
length = strlen(valueString); |
| 494 |
|
width = Tk_TextWidth(scalePtr->tkfont, valueString, length); |
| 495 |
|
|
| 496 |
|
/* |
| 497 |
|
* Adjust the x-coordinate if necessary to keep the text entirely |
| 498 |
|
* inside the window. |
| 499 |
|
*/ |
| 500 |
|
|
| 501 |
|
x -= (width)/2; |
| 502 |
|
if (x < (scalePtr->inset + SPACING)) { |
| 503 |
|
x = scalePtr->inset + SPACING; |
| 504 |
|
} |
| 505 |
|
if (x > (Tk_Width(tkwin) - scalePtr->inset)) { |
| 506 |
|
x = Tk_Width(tkwin) - scalePtr->inset - SPACING - width; |
| 507 |
|
} |
| 508 |
|
Tk_DrawChars(scalePtr->display, drawable, scalePtr->textGC, |
| 509 |
|
scalePtr->tkfont, valueString, length, x, y); |
| 510 |
|
} |
| 511 |
|
|
| 512 |
|
/* |
| 513 |
|
*---------------------------------------------------------------------- |
| 514 |
|
* |
| 515 |
|
* TkpDisplayScale -- |
| 516 |
|
* |
| 517 |
|
* This procedure is invoked as an idle handler to redisplay |
| 518 |
|
* the contents of a scale widget. |
| 519 |
|
* |
| 520 |
|
* Results: |
| 521 |
|
* None. |
| 522 |
|
* |
| 523 |
|
* Side effects: |
| 524 |
|
* The scale gets redisplayed. |
| 525 |
|
* |
| 526 |
|
*---------------------------------------------------------------------- |
| 527 |
|
*/ |
| 528 |
|
|
| 529 |
|
void |
| 530 |
|
TkpDisplayScale(clientData) |
| 531 |
|
ClientData clientData; /* Widget record for scale. */ |
| 532 |
|
{ |
| 533 |
|
TkScale *scalePtr = (TkScale *) clientData; |
| 534 |
|
Tk_Window tkwin = scalePtr->tkwin; |
| 535 |
|
Tcl_Interp *interp = scalePtr->interp; |
| 536 |
|
Pixmap pixmap; |
| 537 |
|
int result; |
| 538 |
|
char string[PRINT_CHARS]; |
| 539 |
|
XRectangle drawnArea; |
| 540 |
|
|
| 541 |
|
scalePtr->flags &= ~REDRAW_PENDING; |
| 542 |
|
if ((scalePtr->tkwin == NULL) || !Tk_IsMapped(scalePtr->tkwin)) { |
| 543 |
|
goto done; |
| 544 |
|
} |
| 545 |
|
|
| 546 |
|
/* |
| 547 |
|
* Invoke the scale's command if needed. |
| 548 |
|
*/ |
| 549 |
|
Tcl_Preserve((ClientData) scalePtr); |
| 550 |
|
if ((scalePtr->flags & INVOKE_COMMAND) && (scalePtr->command != NULL)) { |
| 551 |
|
Tcl_Preserve((ClientData) interp); |
| 552 |
|
sprintf(string, scalePtr->format, scalePtr->value); |
| 553 |
|
result = Tcl_VarEval(interp, scalePtr->command, " ", string, |
| 554 |
|
(char *) NULL); |
| 555 |
|
if (result != TCL_OK) { |
| 556 |
|
Tcl_AddErrorInfo(interp, "\n (command executed by scale)"); |
| 557 |
|
Tcl_BackgroundError(interp); |
| 558 |
|
} |
| 559 |
|
Tcl_Release((ClientData) interp); |
| 560 |
|
} |
| 561 |
|
scalePtr->flags &= ~INVOKE_COMMAND; |
| 562 |
|
if (scalePtr->flags & SCALE_DELETED) { |
| 563 |
|
Tcl_Release((ClientData) scalePtr); |
| 564 |
|
goto done; |
| 565 |
|
} |
| 566 |
|
Tcl_Release((ClientData) scalePtr); |
| 567 |
|
|
| 568 |
|
/* |
| 569 |
|
* In order to avoid screen flashes, this procedure redraws |
| 570 |
|
* the scale in a pixmap, then copies the pixmap to the |
| 571 |
|
* screen in a single operation. This means that there's no |
| 572 |
|
* point in time where the on-sreen image has been cleared. |
| 573 |
|
*/ |
| 574 |
|
|
| 575 |
|
pixmap = Tk_GetPixmap(scalePtr->display, Tk_WindowId(tkwin), |
| 576 |
|
Tk_Width(tkwin), Tk_Height(tkwin), Tk_Depth(tkwin)); |
| 577 |
|
drawnArea.x = 0; |
| 578 |
|
drawnArea.y = 0; |
| 579 |
|
drawnArea.width = Tk_Width(tkwin); |
| 580 |
|
drawnArea.height = Tk_Height(tkwin); |
| 581 |
|
|
| 582 |
|
/* |
| 583 |
|
* Much of the redisplay is done totally differently for |
| 584 |
|
* horizontal and vertical scales. Handle the part that's |
| 585 |
|
* different. |
| 586 |
|
*/ |
| 587 |
|
|
| 588 |
|
if (scalePtr->orient == ORIENT_VERTICAL) { |
| 589 |
|
DisplayVerticalScale(scalePtr, pixmap, &drawnArea); |
| 590 |
|
} else { |
| 591 |
|
DisplayHorizontalScale(scalePtr, pixmap, &drawnArea); |
| 592 |
|
} |
| 593 |
|
|
| 594 |
|
/* |
| 595 |
|
* Now handle the part of redisplay that is the same for |
| 596 |
|
* horizontal and vertical scales: border and traversal |
| 597 |
|
* highlight. |
| 598 |
|
*/ |
| 599 |
|
|
| 600 |
|
if (scalePtr->flags & REDRAW_OTHER) { |
| 601 |
|
if (scalePtr->relief != TK_RELIEF_FLAT) { |
| 602 |
|
Tk_Draw3DRectangle(tkwin, pixmap, scalePtr->bgBorder, |
| 603 |
|
scalePtr->highlightWidth, scalePtr->highlightWidth, |
| 604 |
|
Tk_Width(tkwin) - 2*scalePtr->highlightWidth, |
| 605 |
|
Tk_Height(tkwin) - 2*scalePtr->highlightWidth, |
| 606 |
|
scalePtr->borderWidth, scalePtr->relief); |
| 607 |
|
} |
| 608 |
|
if (scalePtr->highlightWidth != 0) { |
| 609 |
|
GC gc; |
| 610 |
|
|
| 611 |
|
if (scalePtr->flags & GOT_FOCUS) { |
| 612 |
|
gc = Tk_GCForColor(scalePtr->highlightColorPtr, pixmap); |
| 613 |
|
} else { |
| 614 |
|
gc = Tk_GCForColor( |
| 615 |
|
Tk_3DBorderColor(scalePtr->highlightBorder), pixmap); |
| 616 |
|
} |
| 617 |
|
Tk_DrawFocusHighlight(tkwin, gc, scalePtr->highlightWidth, pixmap); |
| 618 |
|
} |
| 619 |
|
} |
| 620 |
|
|
| 621 |
|
/* |
| 622 |
|
* Copy the information from the off-screen pixmap onto the screen, |
| 623 |
|
* then delete the pixmap. |
| 624 |
|
*/ |
| 625 |
|
|
| 626 |
|
XCopyArea(scalePtr->display, pixmap, Tk_WindowId(tkwin), |
| 627 |
|
scalePtr->copyGC, drawnArea.x, drawnArea.y, drawnArea.width, |
| 628 |
|
drawnArea.height, drawnArea.x, drawnArea.y); |
| 629 |
|
Tk_FreePixmap(scalePtr->display, pixmap); |
| 630 |
|
|
| 631 |
|
done: |
| 632 |
|
scalePtr->flags &= ~REDRAW_ALL; |
| 633 |
|
} |
| 634 |
|
|
| 635 |
|
/* |
| 636 |
|
*---------------------------------------------------------------------- |
| 637 |
|
* |
| 638 |
|
* TkpScaleElement -- |
| 639 |
|
* |
| 640 |
|
* Determine which part of a scale widget lies under a given |
| 641 |
|
* point. |
| 642 |
|
* |
| 643 |
|
* Results: |
| 644 |
|
* The return value is either TROUGH1, SLIDER, TROUGH2, or |
| 645 |
|
* OTHER, depending on which of the scale's active elements |
| 646 |
|
* (if any) is under the point at (x,y). |
| 647 |
|
* |
| 648 |
|
* Side effects: |
| 649 |
|
* None. |
| 650 |
|
* |
| 651 |
|
*---------------------------------------------------------------------- |
| 652 |
|
*/ |
| 653 |
|
|
| 654 |
|
int |
| 655 |
|
TkpScaleElement(scalePtr, x, y) |
| 656 |
|
TkScale *scalePtr; /* Widget record for scale. */ |
| 657 |
|
int x, y; /* Coordinates within scalePtr's window. */ |
| 658 |
|
{ |
| 659 |
|
int sliderFirst; |
| 660 |
|
|
| 661 |
|
if (scalePtr->orient == ORIENT_VERTICAL) { |
| 662 |
|
if ((x < scalePtr->vertTroughX) |
| 663 |
|
|| (x >= (scalePtr->vertTroughX + 2*scalePtr->borderWidth + |
| 664 |
|
scalePtr->width))) { |
| 665 |
|
return OTHER; |
| 666 |
|
} |
| 667 |
|
if ((y < scalePtr->inset) |
| 668 |
|
|| (y >= (Tk_Height(scalePtr->tkwin) - scalePtr->inset))) { |
| 669 |
|
return OTHER; |
| 670 |
|
} |
| 671 |
|
sliderFirst = TkScaleValueToPixel(scalePtr, scalePtr->value) |
| 672 |
|
- scalePtr->sliderLength/2; |
| 673 |
|
if (y < sliderFirst) { |
| 674 |
|
return TROUGH1; |
| 675 |
|
} |
| 676 |
|
if (y < (sliderFirst+scalePtr->sliderLength)) { |
| 677 |
|
return SLIDER; |
| 678 |
|
} |
| 679 |
|
return TROUGH2; |
| 680 |
|
} |
| 681 |
|
|
| 682 |
|
if ((y < scalePtr->horizTroughY) |
| 683 |
|
|| (y >= (scalePtr->horizTroughY + 2*scalePtr->borderWidth + |
| 684 |
|
scalePtr->width))) { |
| 685 |
|
return OTHER; |
| 686 |
|
} |
| 687 |
|
if ((x < scalePtr->inset) |
| 688 |
|
|| (x >= (Tk_Width(scalePtr->tkwin) - scalePtr->inset))) { |
| 689 |
|
return OTHER; |
| 690 |
|
} |
| 691 |
|
sliderFirst = TkScaleValueToPixel(scalePtr, scalePtr->value) |
| 692 |
|
- scalePtr->sliderLength/2; |
| 693 |
|
if (x < sliderFirst) { |
| 694 |
|
return TROUGH1; |
| 695 |
|
} |
| 696 |
|
if (x < (sliderFirst+scalePtr->sliderLength)) { |
| 697 |
|
return SLIDER; |
| 698 |
|
} |
| 699 |
|
return TROUGH2; |
| 700 |
|
} |
| 701 |
|
|
| 702 |
|
/* End of tkunixscale.c */ |
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