Fixes for wx

examples/wx_app.py

@@ -2,6 +2,8 @@
 An example demonstrating a wx app with a wgpu viz inside.
 """
 
+import time
+
 import wx
 from rendercanvas.wx import RenderWidget
 
@@ -13,30 +15,35 @@ def __init__(self):
         super().__init__(None, title="wgpu triangle embedded in a wx app")
         self.SetSize(640, 480)
 
-        splitter = wx.SplitterWindow(self)
-
+        # Using present_method 'image' because it reports "The surface texture is suboptimal"
+        self.canvas = RenderWidget(
+            self, update_mode="continuous", present_method="image"
+        )
         self.button = wx.Button(self, -1, "Hello world")
-        self.canvas1 = RenderWidget(splitter)
-        self.canvas2 = RenderWidget(splitter)
-
-        splitter.SplitVertically(self.canvas1, self.canvas2)
-        splitter.SetSashGravity(0.5)
+        self.output = wx.StaticText(self)
 
         sizer = wx.BoxSizer(wx.HORIZONTAL)
         sizer.Add(self.button, 0, wx.EXPAND)
-        sizer.Add(splitter, 1, wx.EXPAND)
+        sizer.Add(self.canvas, 1, wx.EXPAND)
+        sizer.Add(self.output, 1, wx.EXPAND)
         self.SetSizer(sizer)
 
+        self.button.Bind(wx.EVT_BUTTON, self.OnClicked)
+
+        # Force the canvas to be shown, so that it gets a valid handle.
+        # Otherwise GetHandle() is initially 0, and getting a surface will fail.
         self.Show()
 
+    def OnClicked(self, event):  # noqa: N802
+        t = self.output.GetLabel()
+        t += f"\nClicked at {time.time():0.1f}"
+        self.output.SetLabel(t)
+
 
 app = wx.App()
 example = Example()
 
-draw_frame1 = setup_drawing_sync(example.canvas1)
-draw_frame2 = setup_drawing_sync(example.canvas2)
-
-example.canvas1.request_draw(draw_frame1)
-example.canvas2.request_draw(draw_frame2)
+draw_frame = setup_drawing_sync(example.canvas)
+example.canvas.request_draw(draw_frame)
 
 app.MainLoop()

rendercanvas/base.py

@@ -352,7 +352,10 @@ def is_closed(self):
 
     def set_logical_size(self, width, height):
         """Set the window size (in logical pixels)."""
-        self._rc_set_logical_size(float(width), float(height))
+        width, height = float(width), float(height)
+        if width < 0 or height < 0:
+            raise ValueError("Canvas width and height must not be negative")
+        self._rc_set_logical_size(width, height)
 
     def set_title(self, title):
         """Set the window title."""

rendercanvas/wx.py

@@ -160,6 +160,8 @@ def _rc_init(self, present_method=None, **_):
         self.Bind(wx.EVT_MOUSE_EVENTS, self._on_mouse_events)
         self.Bind(wx.EVT_MOTION, self._on_mouse_move)
 
+        self.Show()
+
     def _on_resize_done(self, *args):
         self._draw_lock = False
         self.Refresh()
@@ -200,6 +202,11 @@ def _rc_get_loop(self):
 
     def _rc_get_present_info(self):
         if self._surface_ids is None:
+            # On wx it can take a little while for the handle to be available,
+            # causing GetHandle() to be initially 0, so getting a surface will fail.
+            etime = time.perf_counter() + 1
+            while self.GetHandle() == 0 and time.perf_counter() < etime:
+                loop.process_wx_events()
             self._surface_ids = self._get_surface_ids()
         global _show_image_method_warning
         if self._present_to_screen and self._surface_ids:
@@ -251,8 +258,7 @@ def _rc_get_pixel_ratio(self):
         return self.GetContentScaleFactor()
 
     def _rc_set_logical_size(self, width, height):
-        if width < 0 or height < 0:
-            raise ValueError("Window width and height must not be negative")
+        width, height = int(width), int(height)
         parent = self.Parent
         if isinstance(parent, WxRenderCanvas):
             parent.SetSize(width, height)
@@ -261,7 +267,11 @@ def _rc_set_logical_size(self, width, height):
 
     def _rc_close(self):
         self._is_closed = True
-        self.Hide()
+        parent = self.Parent
+        if isinstance(parent, WxRenderCanvas):
+            parent.Hide()
+        else:
+            self.Hide()
 
     def _rc_is_closed(self):
         return self._is_closed
@@ -415,21 +425,14 @@ class WxRenderCanvas(WrapperRenderCanvas, wx.Frame):
 
     # Most of this is proxying stuff to the inner widget.
 
-    def __init__(*args, **kwargs):
+    def __init__(self, *, parent=None, **kwargs):
         loop.init_wx()
-        super().__init__(*args, **kwargs)
+        super().__init__(parent, **kwargs)
 
     def _rc_init(self, **canvas_kwargs):
         self._subwidget = WxRenderWidget(parent=self, **canvas_kwargs)
-
         self.Bind(wx.EVT_CLOSE, lambda e: self.Destroy())
-
-        # Force the canvas to be shown, so that it gets a valid handle.
-        # Otherwise GetHandle() is initially 0, and getting a surface will fail.
         self.Show()
-        etime = time.perf_counter() + 1
-        while self._subwidget.GetHandle() == 0 and time.perf_counter() < etime:
-            loop.process_wx_events()
 
     # wx methods