Wed, 03/30/2005 - 15:57#1

UltraJoe

XmGetInsensitivePixmap reengineered

Nobody seems to know where XmGetInsensitivePixmap went to, so, since I needed it, I reengineered it. The code follows. Note that this works under Motif 1.2, and should work under 2.x as well. It does require a widget for reference.

/*<br />
* XmGetInsensitivePixmap - return a new pixmap that's the same<br />
* as srcPixmap, but "stippled" in a fashion similar to how<br />
* XmLabel stipples its text.<br />
*<br />
* Written 30-MAR-2005 by Joe Sewell<br />
*<br />
* No warranties are expressed, implied, or otherwise brought<br />
* out by this code. Use at your own risk. Your mileage may<br />
* vary. Do not operate heavy machinery while taking this<br />
* code.<br />
*/<br />
#include <Xm/Xm.h><br />
#include <Mrm/MrmPublic.h></p>
<p>Pixmap XmGetInsensitivePixmap (Widget w, Pixmap srcPixmap)<br />
{<br />
Pixmap insensPixmap = None;<br />
Pixel wBackground;<br />
Display *wDisplay = XtDisplay(w);<br />
Screen *wScreen = XtScreen(w);<br />
Window srcRoot;<br />
int srcX, srcY;<br />
unsigned int srcWidth, srcHeight, srcBorderWidth, srcDepth;<br />
static Boolean GCsSet = False;<br />
XGCValues GCValues;<br />
static GC clearGC, makeMaskGC, copyMaskedGC;<br />
static struct maskData<br />
{<br />
unsigned int width, height;<br />
Pixmap pixmap;<br />
} mask = {0, 0, None};<br />
static char grayPixmapName[] = "50_foreground";</p>
<p> XtVaGetValues (w,<br />
XmNbackground, &wBackground,<br />
NULL);<br />
if (!XGetGeometry (wDisplay,<br />
srcPixmap,<br />
&srcRoot,<br />
&srcX,<br />
&srcY,<br />
&srcWidth,<br />
&srcBorderWidth,<br />
&srcDepth))<br />
{<br />
return None;<br />
}<br />
if (!GCsSet)<br />
{<br />
clearGC = XtAllocateGC (w,<br />
srcDepth,<br />
(XtGCMask) 0,<br />
&GCValues,<br />
(GCForeground | GCBackground),<br />
(GCLineWidth | GCCapStyle | GCJoinStyle |<br />
GCFillRule | GCFont |<br />
GCDashOffset | GCDashList | GCArcMode));<br />
GCValues.fill_style = FillTiled;<br />
GCValues.tile = XmGetPixmapByDepth (wScreen,<br />
grayPixmapName,<br />
WhitePixelOfScreen(wScreen),<br />
BlackPixelOfScreen(wScreen),<br />
1);<br />
if (GCValues.tile == None)<br />
{<br />
XtReleaseGC (clearGC);<br />
return None;<br />
}<br />
GCValues.foreground = WhitePixelOfScreen(wScreen);<br />
GCValues.background = BlackPixelOfScreen(wScreen);<br />
makeMaskGC = XtAllocateGC (w,<br />
1,<br />
(GCFillStyle | GCTile | GCForeground |<br />
GCBackground),<br />
&GCValues,<br />
(XtGCMask) 0,<br />
(GCLineWidth | GCCapStyle | GCJoinStyle |<br />
GCFillRule | GCFont |<br />
GCDashOffset | GCDashList | GCArcMode));<br />
copyMaskedGC = XtAllocateGC (w,<br />
srcDepth,<br />
(XtGCMask) 0,<br />
&GCValues,<br />
GCClipMask,<br />
(GCForeground | GCBackground |<br />
GCLineWidth | GCLineStyle |<br />
GCCapStyle | GCJoinStyle | GCFillStyle |<br />
GCFillRule | GCTile | GCStipple |<br />
GCTileStipXOrigin | GCTileStipYOrigin |<br />
GCFont | GCDashOffset | GCDashList |<br />
GCArcMode));<br />
GCsSet = True;<br />
}<br />
if (mask.width < srcWidth ||<br />
mask.height < srcHeight)<br />
{<br />
if (mask.pixmap != None)<br />
{<br />
XFreePixmap (wDisplay,<br />
mask.pixmap);<br />
}<br />
mask.width = srcWidth;<br />
mask.height = srcHeight;<br />
mask.pixmap = XCreatePixmap (wDisplay,<br />
srcPixmap,<br />
srcWidth,<br />
srcHeight,<br />
1);<br />
if (mask.pixmap == None)<br />
{<br />
mask.width = mask.height = 0;<br />
return None;<br />
}<br />
XFillRectangle (wDisplay,<br />
mask.pixmap,<br />
makeMaskGC,<br />
0, 0,<br />
srcWidth, srcHeight);<br />
XSetClipMask (wDisplay,<br />
copyMaskedGC,<br />
mask.pixmap);<br />
}<br />
insensPixmap = XCreatePixmap (wDisplay,<br />
srcPixmap,<br />
srcWidth,<br />
srcHeight,<br />
srcDepth);<br />
if (insensPixmap == None)<br />
{<br />
return None;<br />
}<br />
XSetForeground (wDisplay,<br />
clearGC,<br />
wBackground);<br />
XSetBackground (wDisplay,<br />
clearGC,<br />
wBackground);<br />
XFillRectangle (wDisplay,<br />
insensPixmap,<br />
clearGC,<br />
0, 0,<br />
srcWidth, srcHeight);<br />
XCopyArea (wDisplay,<br />
srcPixmap,<br />
insensPixmap,<br />
copyMaskedGC,<br />
0, 0,<br />
srcWidth, srcHeight,<br />
0, 0);<br />
return insensPixmap;<br />
}