comments

rendercanvas/glfw.py

@@ -147,9 +147,8 @@ class GlfwRenderCanvas(BaseRenderCanvas):
     # See https://www.glfw.org/docs/latest/group__window.html
 
     def __init__(self, *args, present_method=None, **kwargs):
-        super().__init__(*args, **kwargs)
-
         loop.init_glfw()
+        super().__init__(*args, **kwargs)
 
         if present_method == "image":
             logger.warning(

rendercanvas/qt.py

@@ -472,9 +472,10 @@ class QRenderCanvas(WrapperRenderCanvas, QtWidgets.QWidget):
     # detect this. See https://github.com/pygfx/wgpu-py/pull/68
 
     def __init__(self, parent=None, **kwargs):
-        # When using Qt, there needs to be an
-        # application before any widget is created
+        # There needs to be an application before any widget is created.
         loop.init_qt()
+        # Any kwargs that we want to pass to *this* class, must be explicitly
+        # specified in the signature. The rest goes to the subwidget.
         super().__init__(parent)
 
         self._subwidget = QRenderWidget(self, **kwargs)

rendercanvas/wx.py

@@ -429,11 +429,16 @@ class WxRenderCanvas(WrapperRenderCanvas, wx.Frame):
     # Most of this is proxying stuff to the inner widget.
 
     def __init__(self, parent=None, **kwargs):
+        # There needs to be an application before any widget is created.
         loop.init_wx()
+        # Any kwargs that we want to pass to *this* class, must be explicitly
+        # specified in the signature. The rest goes to the subwidget.
         super().__init__(parent)
 
         self._subwidget = WxRenderWidget(parent=self, **kwargs)
+
         self.Bind(wx.EVT_CLOSE, lambda e: self.Destroy())
+
         self.Show()
         self._final_canvas_init()