void _GuiMacDrawingArea_update (GuiObject widget) {
iam_drawingarea;
if (my exposeCallback) {
struct structGuiDrawingAreaExposeEvent event = { widget };
_GuiMac_clipOnParent (widget);
try {
my exposeCallback (my exposeBoss, & event);
} catch (MelderError) {
Melder_flushError ("Redrawing not completed");
}
GuiMac_clipOff ();
}
}
void _GuiWinDrawingArea_update (GuiObject widget) {
iam_drawingarea;
PAINTSTRUCT paintStruct;
BeginPaint (widget -> window, & paintStruct);
if (my exposeCallback) {
struct structGuiDrawingAreaExposeEvent event = { widget };
try {
my exposeCallback (my exposeBoss, & event);
} catch (MelderError) {
Melder_flushError ("Redrawing not completed");
}
}
EndPaint (widget -> window, & paintStruct);
}
//}
static gboolean _GuiGtkDrawingArea_exposeCallback (GuiObject widget, GdkEventExpose *expose, gpointer void_me) {
iam (GuiDrawingArea);
// TODO: that helps agains the damaged regions outside the rect where the
// Graphics drawing is done, but where does that margin come from in the
// first place?? Additionally this causes even more flickering
//gdk_window_clear_area(widget->window, expose->area.x, expose->area.y, expose->area.width, expose->area.height);
if (my exposeCallback) {
struct structGuiDrawingAreaExposeEvent event = { widget, 0 };
event. x = expose -> area. x;
event. y = expose -> area. y;
event. width = expose -> area. width;
event. height = expose -> area. height;
my exposeCallback (my exposeBoss, & event);
return TRUE; // let the expose callback handle redrawing
}
return FALSE; // let GTK+ handle redrawing
}
