wxPython - 两步创建 wx.TreeCtrl

在本文中，我们将学习如何使用两步创建来创建树控件。为此，我们将在 wx.TreeCtrl 类中使用 Create() 方法。基本上，我们将使用带有空括号的 TreeCtrl() 构造函数初始化树控件，然后我们将使用 Create() 方法和属性与树控件关联。

Syntax:

wx.TreeCtrl.Create(self, parent, id=ID_ANY, pos=DefaultPosition, size=DefaultSize, style=TR_DEFAULT_STYLE, validator=DefaultValidator, name=TreeCtrlNameStr)

Parameters:

Parameter	Type	Description
parent	wx.Window	parent window/frame for Tree Control.
id	wx.WindowID	widget identifier to be associated with Tree Control
pos	wx.Point	position where to put Tree Control.
size	wx.Size	size of the Tree Control widget
style	long	style for Tree Control.
validator	wx.Validator	Validator associated withTree Control.
name	string	Name of 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, 70),
                           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
        itm = self.tree.AppendItem(self.root, 'Item')
 
        # Add item to 'itm'
        self.tree.AppendItem(itm, "Sub Item")
 
        # Expand whole tree
        self.tree.Expand(self.root)
 
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.tree, 0, 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()
 
 
if __name__ == '__main__':
    app = wx.App(redirect = False)
    frame = MainFrame()
    app.MainLoop()

输出：