sizing = ((w != graph->max || h != graph->value) && ((XExposeEvent*)event)->count >= 0);
graph->max = w; graph->value = h;
if(sizing && ((XExposeEvent*)event)->count > 0) { graph->max = 0; return; } // don't bother if further exposure is pending during resize
- if(!graph->textValue || sizing) {
- // create surfaces of new size for widget and buffer
+ if(!graph->textValue || sizing) { // create surfaces of new size for display widget
if(graph->textValue) cairo_surface_destroy((cairo_surface_t *)graph->textValue);
graph->textValue = (char*) cairo_xlib_surface_create(xDisplay, XtWindow(widget), DefaultVisual(xDisplay, 0), w, h);
+ }
+ if(sizing) { // the memory buffer was already created in GenericPopup(),
+ // to give drawing routines opportunity to use it befor first expose event
+ // (which are only processed when main gets to the event loop, so after all init!)
+ // so only change when size is no longer good
if(graph->choice) cairo_surface_destroy((cairo_surface_t *) graph->choice);
graph->choice = (char**) cairo_image_surface_create (CAIRO_FORMAT_ARGB32, w, h);
}
XtAddEventHandler(last, ExposureMask | ButtonPressMask | ButtonReleaseMask | PointerMotionMask, False,
(XtEventHandler) GraphEventProc, &option[i]); // mandatory user-supplied expose handler
if(option[i].min & SAME_ROW) last = forelast, forelast = lastrow;
+ option[i].choice = (char**) cairo_image_surface_create (CAIRO_FORMAT_ARGB32, option[i].max, option[i].value); // image buffer
break;
case PopUp: // note: used only after Graph, so 'last' refers to the Graph widget
option[i].handle = (void*) CreateComboPopup(last, option + i, i + 256*dlgNr, TRUE, option[i].value);