使用wxPython获取系统剪贴板中的数据的教程

涉及到开发桌面程序，尤其是文本处理，剪贴板就很常用，不像 java 中那么烦锁，wxpython 中访问剪贴板非常简单，寥寥几句足以。

    # 取得剪贴板并确保其为打开状态
    text_obj = wx.TextDataObject()
    wx.TheClipboard.Open()
    if wx.TheClipboard.IsOpened() or wx.TheClipboard.Open():
      # do something...
      wx.TheClipboard.Close()

取值：

    if wx.TheClipboard.GetData(text_obj):
      text = text_obj.GetText()

写值：

    text_obj.SetText('要写入的值')
    wx.TheClipboard.SetData(text_obj)

下面的例子中，点击 Copy 会将文本框中的值复制到剪贴板，点击 Paste 会将剪贴板中的文本粘贴到文本框中。

    """
    Get text from and put text on the clipboard.
    """

    import wx

    class MyFrame(wx.Frame):
      def __init__(self):
        wx.Frame.__init__(self, None, title='Accessing the clipboard', size=(400, 300))

        # Components
        self.panel = wx.Panel(self)
        self.text = wx.TextCtrl(self.panel, pos=(10, 10), size=(370, 220))
        self.copy = wx.Button(self.panel, wx.ID_ANY, label='Copy', pos=(10, 240))
        self.paste = wx.Button(self.panel, wx.ID_ANY, label='Paste', pos=(100, 240))

        # Event bindings.
        self.Bind(wx.EVT_BUTTON, self.OnCopy, self.copy)
        self.Bind(wx.EVT_BUTTON, self.OnPaste, self.paste)

      def OnCopy(self, event):
        text_obj = wx.TextDataObject()
        text_obj.SetText(self.text.GetValue())
        if wx.TheClipboard.IsOpened() or wx.TheClipboard.Open():
          wx.TheClipboard.SetData(text_obj)
          wx.TheClipboard.Close()

      def OnPaste(self, event):
        text_obj = wx.TextDataObject()
        if wx.TheClipboard.IsOpened() or wx.TheClipboard.Open():
          if wx.TheClipboard.GetData(text_obj):
            self.text.SetValue(text_obj.GetText())
          wx.TheClipboard.Close()

    app = wx.App(False)
    frame = MyFrame()
    frame.Show(True)
    app.MainLoop()