Qt embedding example: processEvents, to make sure GUI is smooth

doronbehar · doronbehar · commit e632e9edd3dc · 2024-07-18T12:47:30.000+03:00
See also pyqtgraph/pyqtgraph#3092
diff --git a/galleries/examples/user_interfaces/embedding_in_qt_sgskip.py b/galleries/examples/user_interfaces/embedding_in_qt_sgskip.py
@@ -56,6 +56,13 @@ def _update_canvas(self):
         # Shift the sinusoid as a function of time.
         self._line.set_data(t, np.sin(t + time.time()))
         self._line.figure.canvas.draw()
+        # If the timer frequency is fast enough for the Qt platform (in case
+        # the frequency is increased or if the desktop is overloaded), the GUI
+        # might get stuck because the event loop won't manage to respond to
+        # events such as window resize etc while the timer is running. This
+        # forces the timer to process the GUI events and to provide a smooth
+        # experience.
+        qapp.processEvents()
 
 
 if __name__ == "__main__":
