Import Tk 8.6.6 (as of svn r86089)
This commit is contained in:
Zachary Ware
717
unix/tkUnixScale.c
Normal file
717
unix/tkUnixScale.c
Normal file
@@ -0,0 +1,717 @@
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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 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 of
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* this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*/
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#include "tkInt.h"
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#include "tkScale.h"
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/*
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* Forward declarations for functions defined later in this file:
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*/
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static void DisplayHorizontalScale(TkScale *scalePtr,
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Drawable drawable, XRectangle *drawnAreaPtr);
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static void DisplayHorizontalValue(TkScale *scalePtr,
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Drawable drawable, double value, int top);
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static void DisplayVerticalScale(TkScale *scalePtr,
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Drawable drawable, XRectangle *drawnAreaPtr);
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static void DisplayVerticalValue(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(
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Tk_Window tkwin)
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{
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return 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 as
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* 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(
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TkScale *scalePtr)
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{
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Tcl_EventuallyFree(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 function redraws the contents of a vertical scale window. It is
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* invoked as a do-when-idle handler, so it only runs when there's
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* 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 to be
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* redrawn, then drawnAreaPtr is modified to reflect the area that was
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* 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(
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TkScale *scalePtr, /* Widget record for scale. */
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Drawable drawable, /* Where to display scale (window or
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* pixmap). */
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XRectangle *drawnAreaPtr) /* Initally contains area of window; if only a
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* part of the scale is redrawn, gets modified
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* to reflect 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 such
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* 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 function is called to display values (scale readings) for
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* 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 its right
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* edge at "rightEdge", and at a vertical position in the scale that
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* 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(
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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 the
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* value. */
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double value, /* Y-coordinate of number to display,
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* specified in application coords, not in
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* 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[TCL_DOUBLE_SPACE];
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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 = (int) 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 inside
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* 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 function redraws the contents of a horizontal scale window. It is
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* invoked as a do-when-idle handler, so it only runs when there's
|
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* 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 to be
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* redrawn, then drawnAreaPtr is modified to reflect the area that was
|
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* 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(
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TkScale *scalePtr, /* Widget record for scale. */
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Drawable drawable, /* Where to display scale (window or
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* pixmap). */
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XRectangle *drawnAreaPtr) /* Initally contains area of window; if only a
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* part of the scale is redrawn, gets modified
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* to reflect 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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|
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if (tickInterval != 0) {
|
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char valueString[TCL_DOUBLE_SPACE];
|
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double ticks, maxTicks;
|
||||
|
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/*
|
||||
* Ensure that we will only draw enough of the tick values such
|
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* 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)
|
||||
/ (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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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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} else {
|
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if (tickValue < scalePtr->toValue) {
|
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break;
|
||||
}
|
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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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if (scalePtr->showValue) {
|
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DisplayHorizontalValue(scalePtr, drawable, scalePtr->value,
|
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scalePtr->horizValueY);
|
||||
}
|
||||
|
||||
/*
|
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* Display the trough and the slider.
|
||||
*/
|
||||
|
||||
y = scalePtr->horizTroughY;
|
||||
Tk_Draw3DRectangle(tkwin, drawable,
|
||||
scalePtr->bgBorder, scalePtr->inset, y,
|
||||
Tk_Width(tkwin) - 2*scalePtr->inset,
|
||||
scalePtr->width + 2*scalePtr->borderWidth,
|
||||
scalePtr->borderWidth, TK_RELIEF_SUNKEN);
|
||||
XFillRectangle(scalePtr->display, drawable, scalePtr->troughGC,
|
||||
scalePtr->inset + scalePtr->borderWidth,
|
||||
y + scalePtr->borderWidth,
|
||||
(unsigned) (Tk_Width(tkwin) - 2*scalePtr->inset
|
||||
- 2*scalePtr->borderWidth),
|
||||
(unsigned) scalePtr->width);
|
||||
if (scalePtr->state == STATE_ACTIVE) {
|
||||
sliderBorder = scalePtr->activeBorder;
|
||||
} else {
|
||||
sliderBorder = scalePtr->bgBorder;
|
||||
}
|
||||
width = scalePtr->sliderLength/2;
|
||||
height = scalePtr->width;
|
||||
x = TkScaleValueToPixel(scalePtr, scalePtr->value) - width;
|
||||
y += scalePtr->borderWidth;
|
||||
shadowWidth = scalePtr->borderWidth/2;
|
||||
if (shadowWidth == 0) {
|
||||
shadowWidth = 1;
|
||||
}
|
||||
Tk_Draw3DRectangle(tkwin, drawable, sliderBorder,
|
||||
x, y, 2*width, height, shadowWidth, scalePtr->sliderRelief);
|
||||
x += shadowWidth;
|
||||
y += shadowWidth;
|
||||
width -= shadowWidth;
|
||||
height -= 2*shadowWidth;
|
||||
Tk_Fill3DRectangle(tkwin, drawable, sliderBorder, x, y, width, height,
|
||||
shadowWidth, scalePtr->sliderRelief);
|
||||
Tk_Fill3DRectangle(tkwin, drawable, sliderBorder, x+width, y,
|
||||
width, height, shadowWidth, scalePtr->sliderRelief);
|
||||
|
||||
/*
|
||||
* Draw the label at the top of the scale.
|
||||
*/
|
||||
|
||||
if ((scalePtr->flags & REDRAW_OTHER) && (scalePtr->labelLength != 0)) {
|
||||
Tk_FontMetrics fm;
|
||||
|
||||
Tk_GetFontMetrics(scalePtr->tkfont, &fm);
|
||||
Tk_DrawChars(scalePtr->display, drawable, scalePtr->textGC,
|
||||
scalePtr->tkfont, scalePtr->label,
|
||||
scalePtr->labelLength, scalePtr->inset + fm.ascent/2,
|
||||
scalePtr->horizLabelY + fm.ascent);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
*----------------------------------------------------------------------
|
||||
*
|
||||
* DisplayHorizontalValue --
|
||||
*
|
||||
* This function 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(
|
||||
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. */
|
||||
{
|
||||
register Tk_Window tkwin = scalePtr->tkwin;
|
||||
int x, y, length, width;
|
||||
char valueString[TCL_DOUBLE_SPACE];
|
||||
Tk_FontMetrics fm;
|
||||
|
||||
x = TkScaleValueToPixel(scalePtr, value);
|
||||
Tk_GetFontMetrics(scalePtr->tkfont, &fm);
|
||||
y = top + fm.ascent;
|
||||
sprintf(valueString, scalePtr->format, value);
|
||||
length = (int) 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;
|
||||
}
|
||||
|
||||
/*
|
||||
* Check the right border so use starting point +text width for the check.
|
||||
*/
|
||||
|
||||
if (x + width >= (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 function 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) /* Widget record for scale. */
|
||||
{
|
||||
TkScale *scalePtr = (TkScale *) clientData;
|
||||
Tk_Window tkwin = scalePtr->tkwin;
|
||||
Tcl_Interp *interp = scalePtr->interp;
|
||||
Pixmap pixmap;
|
||||
int result;
|
||||
char string[TCL_DOUBLE_SPACE];
|
||||
XRectangle drawnArea;
|
||||
Tcl_DString buf;
|
||||
|
||||
scalePtr->flags &= ~REDRAW_PENDING;
|
||||
if ((scalePtr->tkwin == NULL) || !Tk_IsMapped(scalePtr->tkwin)) {
|
||||
goto done;
|
||||
}
|
||||
|
||||
/*
|
||||
* Invoke the scale's command if needed.
|
||||
*/
|
||||
|
||||
Tcl_Preserve(scalePtr);
|
||||
if ((scalePtr->flags & INVOKE_COMMAND) && (scalePtr->command != NULL)) {
|
||||
Tcl_Preserve(interp);
|
||||
sprintf(string, scalePtr->format, scalePtr->value);
|
||||
Tcl_DStringInit(&buf);
|
||||
Tcl_DStringAppend(&buf, scalePtr->command, -1);
|
||||
Tcl_DStringAppend(&buf, " ", -1);
|
||||
Tcl_DStringAppend(&buf, string, -1);
|
||||
result = Tcl_EvalEx(interp, Tcl_DStringValue(&buf), -1, 0);
|
||||
Tcl_DStringFree(&buf);
|
||||
if (result != TCL_OK) {
|
||||
Tcl_AddErrorInfo(interp, "\n (command executed by scale)");
|
||||
Tcl_BackgroundException(interp, result);
|
||||
}
|
||||
Tcl_Release(interp);
|
||||
}
|
||||
scalePtr->flags &= ~INVOKE_COMMAND;
|
||||
if (scalePtr->flags & SCALE_DELETED) {
|
||||
Tcl_Release(scalePtr);
|
||||
return;
|
||||
}
|
||||
Tcl_Release(scalePtr);
|
||||
|
||||
#ifndef TK_NO_DOUBLE_BUFFERING
|
||||
/*
|
||||
* In order to avoid screen flashes, this function 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));
|
||||
#else
|
||||
pixmap = Tk_WindowId(tkwin);
|
||||
#endif /* TK_NO_DOUBLE_BUFFERING */
|
||||
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);
|
||||
}
|
||||
}
|
||||
|
||||
#ifndef TK_NO_DOUBLE_BUFFERING
|
||||
/*
|
||||
* 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);
|
||||
#endif /* TK_NO_DOUBLE_BUFFERING */
|
||||
|
||||
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(
|
||||
TkScale *scalePtr, /* Widget record for scale. */
|
||||
int x, int 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;
|
||||
}
|
||||
|
||||
/*
|
||||
* Local Variables:
|
||||
* mode: c
|
||||
* c-basic-offset: 4
|
||||
* fill-column: 78
|
||||
* End:
|
||||
*/
|
||||
Reference in New Issue
Block a user