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Comment:Merging fix for 1875c1f30f, a84b20edd
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SHA3-256:47959f6dc006bce278290e5e8187f192eaf078ccd0339afb42dd1db2d70fcd70
User & Date: kevin_walzer 2018-08-12 14:54:32
Original Comment: Merging fix for 1875c1f30f, a84b20eddf, d83153578e
Context
2018-08-12
17:13
Eliminate all usage of CONST84, and fix a few MacOSX compiler warnings check-in: f72c3f43 user: jan.nijtmans tags: trunk
14:54
Merging fix for 1875c1f30f, a84b20edd check-in: 47959f6d user: kevin_walzer tags: trunk
2018-08-11
21:33
More preparation for TIP #494 compatibitly. Add 2 utility functions, which can retreive big strings and ByteArrays without length overflow. check-in: e8961ae6 user: jan.nijtmans tags: trunk
17:48
Remove warning on unused variable Closed-Leaf check-in: c53b4a0f user: kevin_walzer tags: mac-scrollbar-fix
Changes
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Changes to macosx/tkMacOSXScrlbr.c. 

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/*Information on scrollbar layout, metrics, and draw info.*/
typedef struct ScrollbarMetrics {
    SInt32 width, minThumbHeight;
    int minHeight, topArrowHeight, bottomArrowHeight;
    NSControlSize controlSize;
} ScrollbarMetrics;


static ScrollbarMetrics metrics[2] = {
    {15, 54, 26, 14, 14, kControlSizeNormal}, /* kThemeScrollBarMedium */
    {11, 40, 20, 10, 10, kControlSizeSmall},  /* kThemeScrollBarSmall  */
};

HIThemeTrackDrawInfo info = {
    .version = 0,
    .min = 0.0,
    .max = 100.0,
    .attributes = kThemeTrackShowThumb,
};

................................................................................
 extern void
TkpComputeScrollbarGeometry(
			    register TkScrollbar *scrollPtr)
/* Scrollbar whose geometry may have
 * changed. */
{

    int variant, fieldLength;

    if (scrollPtr->highlightWidth < 0) {
    	scrollPtr->highlightWidth = 0;
    }
    scrollPtr->inset = scrollPtr->highlightWidth + scrollPtr->borderWidth;
    variant = ((scrollPtr->vertical ? Tk_Width(scrollPtr->tkwin) :
		Tk_Height(scrollPtr->tkwin)) - 2 * scrollPtr->inset
	       < metrics[0].width) ? 1 : 0;
    scrollPtr->arrowLength = (metrics[variant].topArrowHeight +
			      metrics[variant].bottomArrowHeight) / 2;
    fieldLength = (scrollPtr->vertical ? Tk_Height(scrollPtr->tkwin)
		   : Tk_Width(scrollPtr->tkwin))
	- 2 * (scrollPtr->arrowLength + scrollPtr->inset);
    if (fieldLength < 0) {
    	fieldLength = 0;
    }
    scrollPtr->sliderFirst = fieldLength * scrollPtr->firstFraction;
................................................................................
    if (scrollPtr->sliderFirst > (fieldLength - 2*scrollPtr->borderWidth)) {
    	scrollPtr->sliderFirst = fieldLength - 2*scrollPtr->borderWidth;
    }
    if (scrollPtr->sliderFirst < 0) {
    	scrollPtr->sliderFirst = 0;
    }
    if (scrollPtr->sliderLast < (scrollPtr->sliderFirst +
				 metrics[variant].minThumbHeight)) {
    	scrollPtr->sliderLast = scrollPtr->sliderFirst +
	    metrics[variant].minThumbHeight;
    }
    if (scrollPtr->sliderLast > fieldLength) {
    	scrollPtr->sliderLast = fieldLength;
    }

    scrollPtr->sliderFirst += scrollPtr->arrowLength + scrollPtr->inset;
    scrollPtr->sliderLast += scrollPtr->arrowLength + scrollPtr->inset;
................................................................................
    /* Register the desired geometry for the window (leave enough space
     * for the two arrows plus a minimum-size slider, plus border around
     * the whole window, if any). Then arrange for the window to be
     * redisplayed.
     */

    if (scrollPtr->vertical) {
    	Tk_GeometryRequest(scrollPtr->tkwin, scrollPtr->width + 2 * scrollPtr->inset, 2 * (scrollPtr->arrowLength + scrollPtr->borderWidth + scrollPtr->inset) +  metrics[variant].minThumbHeight);
    } else {
    	Tk_GeometryRequest(scrollPtr->tkwin, 2 * (scrollPtr->arrowLength + scrollPtr->borderWidth + scrollPtr->inset) + metrics[variant].minThumbHeight, scrollPtr->width + 2 * scrollPtr->inset);
    }
    Tk_SetInternalBorder(scrollPtr->tkwin, scrollPtr->inset);

}



................................................................................
UpdateControlValues(
		    TkScrollbar *scrollPtr)		/* Scrollbar data struct. */
{
    Tk_Window tkwin = scrollPtr->tkwin;
    MacDrawable *macWin = (MacDrawable *) Tk_WindowId(scrollPtr->tkwin);
    double dViewSize;
    HIRect  contrlRect;
    int variant;
    short width, height;

    NSView *view = TkMacOSXDrawableView(macWin);
    CGFloat viewHeight = [view bounds].size.height;
    NSRect frame;
    frame = NSMakeRect(macWin->xOff, macWin->yOff, Tk_Width(tkwin),
		       Tk_Height(tkwin));
................................................................................

    contrlRect = NSRectToCGRect(frame);
    info.bounds = contrlRect;

    width = contrlRect.size.width;
    height = contrlRect.size.height;

   variant = contrlRect.size.width < metrics[0].width ? 1 : 0;

    /*
     * Ensure we set scrollbar control bounds only once all size adjustments
     * have been computed.
     */

    info.bounds = contrlRect;
    if (scrollPtr->vertical) {
................................................................................
	info.value = info.max - factor * scrollPtr->firstFraction;
      }
    } else {
	 info.value =  MIN_SCROLLBAR_VALUE + factor * scrollPtr->firstFraction;
    }

    if((scrollPtr->firstFraction <= 0.0 && scrollPtr->lastFraction >= 1.0)
       || height <= metrics[variant].minHeight) {
    	info.enableState = kThemeTrackHideTrack;
    } else {
    	info.enableState = kThemeTrackActive;
    	info.attributes = kThemeTrackShowThumb |  kThemeTrackThumbRgnIsNotGhost;
    }

}








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/*Information on scrollbar layout, metrics, and draw info.*/
typedef struct ScrollbarMetrics {
    SInt32 width, minThumbHeight;
    int minHeight, topArrowHeight, bottomArrowHeight;
    NSControlSize controlSize;
} ScrollbarMetrics;


static ScrollbarMetrics metrics = {
  {15, 54, 26, 14, 14, kControlSizeNormal}, /* kThemeScrollBarMedium */

};

HIThemeTrackDrawInfo info = {
    .version = 0,
    .min = 0.0,
    .max = 100.0,
    .attributes = kThemeTrackShowThumb,
};

................................................................................
 extern void
TkpComputeScrollbarGeometry(
			    register TkScrollbar *scrollPtr)
/* Scrollbar whose geometry may have
 * changed. */
{

    int fieldLength;

    if (scrollPtr->highlightWidth < 0) {
    	scrollPtr->highlightWidth = 0;
    }
    scrollPtr->inset = scrollPtr->highlightWidth + scrollPtr->borderWidth;



    scrollPtr->arrowLength = (metrics.topArrowHeight +
			      metrics.bottomArrowHeight) / 2;
    fieldLength = (scrollPtr->vertical ? Tk_Height(scrollPtr->tkwin)
		   : Tk_Width(scrollPtr->tkwin))
	- 2 * (scrollPtr->arrowLength + scrollPtr->inset);
    if (fieldLength < 0) {
    	fieldLength = 0;
    }
    scrollPtr->sliderFirst = fieldLength * scrollPtr->firstFraction;
................................................................................
    if (scrollPtr->sliderFirst > (fieldLength - 2*scrollPtr->borderWidth)) {
    	scrollPtr->sliderFirst = fieldLength - 2*scrollPtr->borderWidth;
    }
    if (scrollPtr->sliderFirst < 0) {
    	scrollPtr->sliderFirst = 0;
    }
    if (scrollPtr->sliderLast < (scrollPtr->sliderFirst +
				 metrics.minThumbHeight)) {
    	scrollPtr->sliderLast = scrollPtr->sliderFirst +
	    metrics.minThumbHeight;
    }
    if (scrollPtr->sliderLast > fieldLength) {
    	scrollPtr->sliderLast = fieldLength;
    }

    scrollPtr->sliderFirst += scrollPtr->arrowLength + scrollPtr->inset;
    scrollPtr->sliderLast += scrollPtr->arrowLength + scrollPtr->inset;
................................................................................
    /* Register the desired geometry for the window (leave enough space
     * for the two arrows plus a minimum-size slider, plus border around
     * the whole window, if any). Then arrange for the window to be
     * redisplayed.
     */

    if (scrollPtr->vertical) {
    	Tk_GeometryRequest(scrollPtr->tkwin, scrollPtr->width + 2 * scrollPtr->inset, 2 * (scrollPtr->arrowLength + scrollPtr->borderWidth + scrollPtr->inset) +  metrics.minThumbHeight);
    } else {
    	Tk_GeometryRequest(scrollPtr->tkwin, 2 * (scrollPtr->arrowLength + scrollPtr->borderWidth + scrollPtr->inset) + metrics.minThumbHeight, scrollPtr->width + 2 * scrollPtr->inset);
    }
    Tk_SetInternalBorder(scrollPtr->tkwin, scrollPtr->inset);

}



................................................................................
UpdateControlValues(
		    TkScrollbar *scrollPtr)		/* Scrollbar data struct. */
{
    Tk_Window tkwin = scrollPtr->tkwin;
    MacDrawable *macWin = (MacDrawable *) Tk_WindowId(scrollPtr->tkwin);
    double dViewSize;
    HIRect  contrlRect;

    short width, height;

    NSView *view = TkMacOSXDrawableView(macWin);
    CGFloat viewHeight = [view bounds].size.height;
    NSRect frame;
    frame = NSMakeRect(macWin->xOff, macWin->yOff, Tk_Width(tkwin),
		       Tk_Height(tkwin));
................................................................................

    contrlRect = NSRectToCGRect(frame);
    info.bounds = contrlRect;

    width = contrlRect.size.width;
    height = contrlRect.size.height;



    /*
     * Ensure we set scrollbar control bounds only once all size adjustments
     * have been computed.
     */

    info.bounds = contrlRect;
    if (scrollPtr->vertical) {
................................................................................
	info.value = info.max - factor * scrollPtr->firstFraction;
      }
    } else {
	 info.value =  MIN_SCROLLBAR_VALUE + factor * scrollPtr->firstFraction;
    }

    if((scrollPtr->firstFraction <= 0.0 && scrollPtr->lastFraction >= 1.0)
       || height <= metrics.minHeight) {
    	info.enableState = kThemeTrackHideTrack;
    } else {
    	info.enableState = kThemeTrackActive;
    	info.attributes = kThemeTrackShowThumb |  kThemeTrackThumbRgnIsNotGhost;
    }

}

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