Add spacers

src/main.py

@@ -85,6 +85,7 @@ class Cast(wx.Frame):
     def show_provider_list(self, _) -> None:
         self.m_sizer.Clear(delete_windows=True)
         self.m_sizer = wx.BoxSizer(wx.VERTICAL)
+        self.m_sizer.AddStretchSpacer()
         closebtn = wx.Button(self.m_panel, -1, label="Close", size=(WIDTH, BTN_HEIGHT))
         closebtn.Bind(wx.EVT_BUTTON, lambda event: self.Destroy())
         self.m_sizer.Add(closebtn)
@@ -106,6 +107,7 @@ class Cast(wx.Frame):
         self.m_selected_provider = self.m_providers[provider_index]
         self.m_sizer.Clear(delete_windows=True)
         self.m_sizer = wx.BoxSizer(wx.VERTICAL)
+        self.m_sizer.AddStretchSpacer()
         bck_callback = lambda event: self.show_provider_list(event)
         self.add_back_button(bck_callback)
         channel_index = 0
@@ -124,6 +126,7 @@ class Cast(wx.Frame):
     def show_video_list(self, _, index=0) -> None:
         self.m_sizer.Clear(delete_windows=True)
         self.m_sizer = wx.BoxSizer(wx.VERTICAL)
+        self.m_sizer.AddStretchSpacer()
         channel = self.m_selected_provider.get_channel_by_index(index)
         if channel.wait():
             with wx.BusyInfo("Please wait, working..."):
@@ -172,8 +175,8 @@ class Cast(wx.Frame):
         self.m_sizer = wx.GridBagSizer()
         self.m_control = wx.media.MediaCtrl(
             self.m_panel,
-            size=(WIDTH, HEIGHT/2),
-            style=wx.SIMPLE_BORDER,
+        #    size=(WIDTH, HEIGHT/2),
+        #    style=wx.SIMPLE_BORDER,
             szBackend=wx.media.MEDIABACKEND_GSTREAMER,
         )
         play_button = wx.Button(self.m_panel, -1, "Play")