wxPython – wx.TreeCtrl 中的 Delete() 方法

在本文中，我们将了解与 wxPython 的 wx.TreeCtrl 类关联的 Delete() 方法。 Delete()函数仅用于从树中删除特定项目，它可以是根项目或终端项目。

将生成 EVT_TREE_DELETE_ITEM 事件。

此函数可能会导致对 GetNextChild 的后续调用失败。

Syntax:

wx.TreeCtrl.Delete(self, item)

Parameters:

Parameter	type	Description
item	wx.TreeItemId	item tha we want to get deleted from the Tree Control

代码示例：

Python

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：

在点击按钮之前

点击按钮后