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#include <Xw_Extension.h>
/* ifdef then trace on */
#ifdef TRACE
#define TRACE_ERASE_AREA
#endif
/*
STATUS Xw_erase_area (awindow,px,py,pwidth,pheight)
XW_EXT_WINDOW *awindow
int px,py area center given in PIXELS
int pwidth,pheight area size given in PIXELS
Erase the attached Drawable area .
returns ERROR if NO attached pixmap exist or
area is out of window
returns SUCCESS if successful
*/
#ifdef XW_PROTOTYPE
XW_STATUS Xw_erase_area (void* awindow,
int px,int py,int pwidth,int pheight)
#else
XW_STATUS Xw_erase_area (awindow,px,py,pwidth,pheight)
void *awindow;
int px,py,pwidth,pheight ;
#endif /*XW_PROTOTYPE*/
{
XW_EXT_WINDOW *pwindow = (XW_EXT_WINDOW*)awindow;
int i ;
if( !Xw_isdefine_window(pwindow) ) {
/*ERROR*Bad EXT_WINDOW Address*/
Xw_set_error(24,"Xw_erase_area",pwindow) ;
return (XW_ERROR) ;
}
if( (px + pwidth/2) < 0 || (px - pwidth/2) > _WIDTH ||
(py + pheight/2) < 0 || (py - pheight/2) > _HEIGHT ) {
/*WARNING*Try to Erase outside the window*/
Xw_set_error(40,"Xw_erase_area",pwindow) ;
return (XW_ERROR) ;
}
px -= pwidth/2 ; py -= pheight/2 ;
if( _BPIXMAP ) {
XCopyArea(_DISPLAY,_BPIXMAP,_DRAWABLE,pwindow->qgwind.gccopy,
px,py,pwidth,pheight,px,py) ;
} else {
if( _DRAWABLE == _WINDOW ) {
XClearArea(_DISPLAY,_WINDOW,px,py,pwidth,pheight,False) ;
} else {
XFillRectangle(_DISPLAY,_DRAWABLE,pwindow->qgwind.gcclear,
px,py,pwidth,pheight) ;
}
}
for( i=1 ; i<MAXBUFFERS ; i++ ) {
if( _BUFFER(i).isdrawn ) {
int xmin,ymin,xmax,ymax ;
if( _BUFFER(i).isupdated ) {
xmin = _BUFFER(i).uxmin ;
ymin = _BUFFER(i).uymin ;
xmax = _BUFFER(i).uxmax ;
ymax = _BUFFER(i).uymax ;
} else {
xmin = _BUFFER(i).rxmin ;
ymin = _BUFFER(i).rymin ;
xmax = _BUFFER(i).rxmax ;
ymax = _BUFFER(i).rymax ;
}
if( xmax < px || xmin > px+pwidth ) continue ;
if( ymax < py || ymin > py+pheight ) continue ;
Xw_erase_buffer(pwindow,-i) ;
}
}
XFlush(_DISPLAY) ;
#ifdef TRACE_ERASE_AREA
if( Xw_get_trace() > 1 ) {
printf(" Xw_erase_area(%lx,%d,%d,%d,%d)\n",(long ) pwindow,px,py,pwidth,pheight);
}
#endif
return (XW_SUCCESS);
}
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