Overload qt canvas.update() to request a draw

wgpu/gui/_loop.py

@@ -360,7 +360,7 @@ def _schedule_next_tick(self):
             return
 
         # Determine delay
-        if self._mode == "fastest":
+        if self._mode == "fastest" or self._max_fps <= 0:
             delay = 0
         else:
             delay = 1 / self._max_fps

wgpu/gui/qt.py

@@ -184,6 +184,10 @@ def paintEvent(self, event):  # noqa: N802 - this is a Qt method
 
     # Methods that we add from wgpu (snake_case)
 
+    def update(self):
+        # Overload update() because that's how Qt devs are used to requesting a new draw
+        self.request_draw()
+
     def _request_draw(self):
         # Ask Qt to do a paint event
         QtWidgets.QWidget.update(self)
@@ -496,6 +500,10 @@ def closeEvent(self, event):  # noqa: N802
 
     # Methods that we add from wgpu (snake_case)
 
+    def update(self):
+        # Overload update() because that's how Qt devs are used to requesting a new draw
+        self.request_draw()
+
     def _request_draw(self):
         self._subwidget._request_draw()