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#include <Xw_Extension.h>
/* ifdef then trace on */
#ifdef TRACE
#define TRACE_SET_BACKGROUND_INDEX
#endif
/*
XW_STATUS Xw_set_background_index(awindow,index):
XW_EXT_WINDOW *awindow
int index Background Index in the colormap
Update Background Color index .
Returns XW_ERROR if Extended Window or Colormap is wrong
or Index is not defined .
Returns XW_SUCCESS if Successful
*/
#ifdef XW_PROTOTYPE
XW_STATUS Xw_set_background_index (void *awindow,int index)
#else
XW_STATUS Xw_set_background_index (awindow,index)
void *awindow;
int index ;
#endif /*XW_PROTOTYPE*/
{
XW_EXT_WINDOW *pwindow = (XW_EXT_WINDOW*)awindow ;
unsigned long backpixel,highpixel ;
int i ;
if ( !Xw_isdefine_window(pwindow) ) {
/*ERROR*Bad EXT_WINDOW Address*/
Xw_set_error(24,"Xw_set_background_index",pwindow) ;
return (XW_ERROR) ;
}
if( index >= 0 ) {
if ( !Xw_isdefine_colorindex(_COLORMAP,index) ) {
/*ERROR*Bad Defined Color Index*/
Xw_set_error(41,"Xw_set_background_index",&index) ;
return (XW_ERROR) ;
}
backpixel = _COLORMAP->pixels[index] ;
_COLORMAP->define[index] = BACKCOLOR ;
} else {
backpixel = _COLORMAP->backpixel ;
}
highpixel = _COLORMAP->highpixel ;
XSetForeground(_DISPLAY, pwindow->qgwind.gccopy, highpixel) ;
highpixel ^= backpixel ;
XSetWindowBackground (_DISPLAY, _WINDOW, backpixel) ;
XSetBackground(_DISPLAY, pwindow->qgwind.gc, backpixel) ;
XSetBackground(_DISPLAY, pwindow->qgwind.gccopy, backpixel) ;
XSetBackground(_DISPLAY, pwindow->qgwind.gcclear, backpixel) ;
XSetBackground(_DISPLAY, pwindow->qgwind.gchigh, backpixel) ;
XSetForeground(_DISPLAY, pwindow->qgwind.gcclear, backpixel) ;
XSetForeground(_DISPLAY, pwindow->qgwind.gchigh, highpixel) ;
for( i=0 ; i<MAXQG ; i++ ) {
XSetBackground(_DISPLAY, pwindow->qgline[i].gc, backpixel);
XSetBackground(_DISPLAY, pwindow->qgpoly[i].gc, backpixel);
XSetBackground(_DISPLAY, pwindow->qgtext[i].gc, backpixel);
XSetBackground(_DISPLAY, pwindow->qgmark[i].gc, backpixel);
}
pwindow->backindex = index ;
#ifdef TRACE_SET_BACKGROUND_INDEX
if( Xw_get_trace() ) {
printf(" Xw_set_background_index(%lx,%d)\n",(long ) pwindow,index) ;
}
#endif
return (XW_SUCCESS);
}
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