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wxPython wx.TreeCtrl GetChildrenCount()用法及代码示例


在本文中,我们将学习与wxPython的wx.TreeCtrl类关联的GetChildren方法。返回分支中的项目数。 GetChildren()方法采用两个参数,第一个是item,另一个是递归。

recursively是一个布尔参数,如果recursively为True,则返回子代总数,否则,仅计算一个子级。 GetChildrenCount()返回int(与TreeCtrl项关联的子项总数)。

用法:wx.TreeCtrl.GetChildrenCount()

参数:

参数 Type Description
item wx.TreeItemId 我们想要确保可见的项目。
recursively boolean 是否递归获取孩子。

范例1:



Python

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")  
        item3 = self.tree.AppendItem(item, "SubItem") 
        item4 = self.tree.AppendItem(item, "SubItem") 
        item5 = self.tree.AppendItem(item2, "SubItem") 
        item6 = self.tree.AppendItem(item, "SubItem") 
  
        # expand root node 
        print(self.tree.GetChildrenCount(self.root, False)) 
  
        # expand all nodes of the tree 
        self.tree.Expand()  
          
        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()  
  
  
if __name__ == '__main__':  
    app = wx.App(redirect = False)  
    frame = MainFrame()  
    app.MainLoop()

输出:

2

范例2:

Python

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")  
        item3 = self.tree.AppendItem(item, "SubItem") 
        item4 = self.tree.AppendItem(item, "SubItem") 
        item5 = self.tree.AppendItem(item2, "SubItem") 
        item6 = self.tree.AppendItem(item, "SubItem") 
  
        # expand root node 
        print(self.tree.GetChildrenCount(self.root, True)) 
  
        # expand all nodes of the tree 
        self.tree.ExpandAllChildren(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()  
  
  
if __name__ == '__main__':  
    app = wx.App(redirect = False)  
    frame = MainFrame()  
    app.MainLoop()

输出:

6





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注:本文由纯净天空筛选整理自RahulSabharwal大神的英文原创作品 wxPython – GetChildrenCount() method in wx.TreeCtrl。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。