#2467 let draw_fbo specify the return value

so it can stop processing of the event, or let it continue

xpra/client/gl/gtk3/client_window.py

@@ -130,11 +130,11 @@ def new_backing(self, bw:int, bh:int) -> None:
         self.apply_geometry_hints(self.geometry_hints)
 
     def draw_widget(self, widget, context) -> bool:
-        log("draw_widget(%s, %s)", widget, context)
-        if not self.get_mapped():
-            return False
+        mapped = self.get_mapped()
         backing = self._backing
+        log(f"draw_widget({widget}, {context}) {mapped=}, {backing=}", )
+        if not mapped:
+            return False
         if not backing:
             return False
-        backing.draw_fbo(context)
-        return True
+        return backing.draw_fbo(context)

xpra/client/gl/gtk3/drawing_area.py

@@ -104,8 +104,9 @@ def close_gl_config(self) -> None:
             self.context = None
             c.destroy()
 
-    def draw_fbo(self, _context) -> None:
+    def draw_fbo(self, _context) -> bool:
         w, h = self.size
         with self.gl_context() as ctx:
             self.gl_init(ctx)
             self.present_fbo(ctx, 0, 0, w, h)
+        return True

xpra/client/gtk3/window_base.py

@@ -354,7 +354,7 @@ def configure_event(_w, event):
         widget.connect("scroll-event", scroll)
         widget.connect("draw", self.draw_widget)
 
-    def draw_widget(self, widget, context) -> None:
+    def draw_widget(self, widget, context) -> bool:
         raise NotImplementedError()
 
     def get_drawing_area_geometry(self):