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dashley |
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/* $Header$ */
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dashley |
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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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295 |
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*--------------------------------------------------------------
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296 |
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*
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297 |
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* DisplayHorizontalScale --
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298 |
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*
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299 |
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* This procedure redraws the contents of a horizontal scale
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300 |
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* window. It is invoked as a do-when-idle handler, so it only
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301 |
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* runs when there's nothing else for the application to do.
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302 |
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*
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303 |
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* Results:
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304 |
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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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306 |
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* area that was actually modified.
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307 |
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*
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308 |
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* Side effects:
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309 |
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* Information appears on the screen.
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310 |
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*
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311 |
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*--------------------------------------------------------------
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312 |
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*/
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313 |
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static void
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315 |
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DisplayHorizontalScale(scalePtr, drawable, drawnAreaPtr)
|
316 |
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TkScale *scalePtr; /* Widget record for scale. */
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317 |
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Drawable drawable; /* Where to display scale (window
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318 |
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* or pixmap). */
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319 |
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XRectangle *drawnAreaPtr; /* Initally contains area of window;
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320 |
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* if only a part of the scale is
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321 |
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* redrawn, gets modified to reflect
|
322 |
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* the part of the window that was
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323 |
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* redrawn. */
|
324 |
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{
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325 |
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register Tk_Window tkwin = scalePtr->tkwin;
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326 |
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int x, y, width, height, shadowWidth;
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327 |
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double tickValue, tickInterval = scalePtr->tickInterval;
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328 |
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Tk_3DBorder sliderBorder;
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329 |
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330 |
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/*
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331 |
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* Display the information from bottom to top across the window.
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332 |
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*/
|
333 |
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334 |
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if (!(scalePtr->flags & REDRAW_OTHER)) {
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drawnAreaPtr->x = scalePtr->inset;
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336 |
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drawnAreaPtr->y = scalePtr->horizValueY;
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337 |
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drawnAreaPtr->width -= 2*scalePtr->inset;
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338 |
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drawnAreaPtr->height = scalePtr->horizTroughY + scalePtr->width
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339 |
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+ 2*scalePtr->borderWidth - scalePtr->horizValueY;
|
340 |
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}
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341 |
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Tk_Fill3DRectangle(tkwin, drawable, scalePtr->bgBorder,
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drawnAreaPtr->x, drawnAreaPtr->y, drawnAreaPtr->width,
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343 |
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drawnAreaPtr->height, 0, TK_RELIEF_FLAT);
|
344 |
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if (scalePtr->flags & REDRAW_OTHER) {
|
345 |
|
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/*
|
346 |
|
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* 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 |
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* fromValue would take. Not exact, but better than no constraint.
|
357 |
|
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*/
|
358 |
|
|
ticks = fabs((scalePtr->toValue - scalePtr->fromValue)
|
359 |
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/ tickInterval);
|
360 |
|
|
sprintf(valueString, scalePtr->format, scalePtr->fromValue);
|
361 |
|
|
maxTicks = (double) Tk_Width(tkwin)
|
362 |
|
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/ (double) Tk_TextWidth(scalePtr->tkfont, valueString, -1);
|
363 |
|
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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 |
dashley |
69 |
/* End of tkunixscale.c */
|