wxPython wx.TreeCtrl GetFocusedItem()用法及代碼示例

# import required modules 
import wx 
  
  
class MyTree(wx.TreeCtrl):
  
    def __init__(self, parent, id, pos, size, style):
        wx.TreeCtrl.__init__(self, parent, id, pos, size, style) 
  
  
class TreePanel(wx.Panel):
  
    def __init__(self, parent):
        wx.Panel.__init__(self, parent) 
  
    # create tree control in window 
        self.tree = MyTree(self, wx.ID_ANY, wx.DefaultPosition, wx.DefaultSize, 
                           wx.TR_HAS_BUTTONS) 
  
        # create tree root 
        self.root = self.tree.AddRoot('root') 
        self.tree.SetPyData(self.root, ('key', 'value')) 
  
        # add item to root 
        item = self.tree.AppendItem(self.root, "Item") 
        item2 = self.tree.AppendItem(self.root, "Item") 
  
        # set focused/selected item in control 
        self.tree.SetFocusedItem(item) 
  
        # print if first visible item is 
        # a valid tree item 
        if(self.tree.GetFocusedItem().IsOk()):
            print("Valid Item") 
            print(self.tree.GetFocusedItem()) 
        else:
            print("Invalid Item") 
  
        sizer = wx.BoxSizer(wx.VERTICAL) 
        sizer.Add(self.tree, 100, wx.EXPAND) 
        self.SetSizer(sizer) 
  
  
class MainFrame(wx.Frame):
  
    def __init__(self):
        wx.Frame.__init__(self, parent=None, title='TreeCtrl Demo') 
        panel = TreePanel(self) 
        self.Show() 
  
  
# Driver Code 
if __name__ == '__main__':
    app = wx.App(redirect=False) 
    frame = MainFrame() 
    app.MainLoop()