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

在本文中，我们将学习wxPython中的另一个函数，即与wxPython的wx.TreeCtrl类关联的CollapseAndReset()方法。 CollapseAndReset()函数仅折叠特定项目并删除其所有子项。

它使用TreeItemId作为参数。

用法： wx.TreeCtrl.CollapseAndReset(Self, item)

代码示例：

蟒蛇

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 
        self.tree = MyTree(self, wx.ID_ANY, wx.DefaultPosition, 
                                 (150,150), wx.TR_HAS_BUTTONS) 
  
        # 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.itm2 = self.tree.AppendItem(self.itm, "Sub Item") 
  
        # Add child item to itm2 
        self.itm3 = self.tree.AppendItem(self.itm2, "Another 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, "Collapse", (10,100)) 
        # Bind event function with button 
        self.btn.Bind(wx.EVT_BUTTON, self.onclick) 
  
    def onclick(self, e):
        # collapse all children of itm recursively 
        self.tree.CollapseAndReset(self.itm) 
  
  
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

单击按钮后

相关用法

注：本文由纯净天空筛选整理自RahulSabharwal大神的英文原创作品 wxPython – CollapseAndReset() 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。