wxPython wx.TreeCtrl中的Delete()方法

在这篇文章中，我们将学习与wxPython的wx.TreeCtrl类相关的Delete()方法。Delete()函数被简单地用于从树中删除特定的项目，它可以是根项目或终端项目。

将会产生一个EVT_TREE_DELETE_ITEM事件。

这个函数可能会导致后续调用GetNextChild失败。

语法 。

wx.TreeCtrl.Delete(self, item)

参数 。

代码示例 。

import wx
 
class TreePanel(wx.Panel):
 
    def __init__(self, parent):
        wx.Panel.__init__(self, parent)
 
        # initialize Tree Control
        self.tree = wx.TreeCtrl(self, wx.ID_ANY, wx.DefaultPosition, (100, 150),
                                                 wx.TR_HAS_BUTTONS)
 
        # create Tree Control using Create() method
        self.tree.Create
        # Add root to Tree Control
        self.root = self.tree.AddRoot('Root')
 
        # Add item to root
        self.itm = self.tree.AppendItem(self.root, 'Item')
 
        # Add item to 'itm'
        self.si1 = self.tree.AppendItem(self.itm, "Sub Item")
 
        # Add another item
        self.si2 = self.tree.AppendItem(self.itm, "Another Sub Item")
 
        # Expand whole tree
        self.tree.ExpandAll()
 
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.tree, 0, wx.EXPAND)
        self.SetSizer(sizer)
 
        # Add button in frame
        self.btn = wx.Button(self, 1, "Delete", (10, 170))
         
        # Bind event function with button
        self.btn.Bind(wx.EVT_BUTTON, self.onclick)
 
    def onclick(self, e):
        # Delete si2 from the tree
        self.tree.Delete(self.si2)
 
 
class MainFrame(wx.Frame):
 
    def __init__(self):
        wx.Frame.__init__(self, parent = None, title ='TreeCtrl Demo')
        panel = TreePanel(self)
        self.Show()
 
 
if __name__ == '__main__':
    app = wx.App(redirect = False)
    frame = MainFrame()
    app.MainLoop()

输出 。

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