[Python] 如何套用 xrc 檔案

參考：UsingXmlResources

感想： xrc 只有單獨介面，所以若要取值或 binding 動作的話，就得自己再寫code處理，雖然已經方便許多，但是似乎還是有些煩瑣。

檔案：main.py, frame.py, gui.xrc
main.py

import wx
import wx.xrc as xrc
GUI_FILENAME       = "gui.xrc"
GUI_MAINFRAME_NAME = "MainFrame"
class MyApp(wx.App):
    def OnInit(self):
        # Load all controls:
        self._do_layout()
        return True
    def _do_layout(self):
        self.res = xrc.XmlResource( GUI_FILENAME )
        self.frame = self.res.LoadFrame( None, GUI_MAINFRAME_NAME )
        self.SetTopWindow(self.frame)
        self.frame.Show(1)
if __name__ == '__main__':
    app = MyApp()
    app.MainLoop()

frame.py

import wx
import wx.xrc as xrc
class MainFrame(wx.Frame):
    def __init__(self):
        pre = wx.PreFrame()
        # the Create step is done by XRC.
        self.PostCreate(pre)
        self.Bind(wx.EVT_WINDOW_CREATE, self.OnCreate)
    def OnCreate(self, event):
        self.Unbind(wx.EVT_WINDOW_CREATE)
        wx.CallAfter(self._PostInit)
        event.Skip()
        return True
    def _PostInit(self):
        # Do all init here
        self.Fit()
        self.SetAutoLayout(True)
        self.btnExit = xrc.XRCCTRL(self, 'btnExit')
        self.Bind(wx.EVT_BUTTON, self.OnBtnExit, self.btnExit)
        # Set properties:
        self.btnExit.SetLabel('Exit')
    def OnBtnExit(self, evt=None):
        self.Close()

gui.xrc

<?xml version="1.0" encoding="UTF-8"?>
<resource version="2.3.0.1">
  <object class="wxFrame" name="demoframe" subclass="form.MainFrame">
    <centered>1</centered>
    <style>wxDEFAULT_FRAME_STYLE</style>
    <title>Testing wx XRC mechanism</title>
    <object class="wxBoxSizer">
      <orient>wxHORIZONTAL</orient>
      <object class="sizeritem">
        <object class="wxPanel">
          <object class="wxBoxSizer">
            <orient>wxHORIZONTAL</orient>
            <object class="sizeritem">
              <object class="wxButton" name="btnExit">
                <label></label>
                <default>1</default>
              </object>
              <flag>wxALL|wxALIGN_CENTRE_VERTICAL|wxALIGN_CENTRE_HORIZONTAL</flag>
              <border>20</border>
            </object>
          </object>
        </object>
        <flag>wxALL|wxEXPAND</flag>
      </object>
    </object>
  </object>
</resource>