wxPython – Collapse() method wx.TreeCtrl
In this article we are going to learn about Collapse() method associated with wx.TreeCtrl class of wxPython. Collapse() method is used to simply collapse the given item, that is, the root item gets folded and child items get invisible.
Collapse() method takes a wx.TreeItemId parameter.
Syntax: wx.TreeCtrl.Collapse(item)
Parameters
Parameter Input Type Description item wx.TreeItemId item or root which we want to collapse
Code Example:
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, wx.DefaultSize, wx.TR_HAS_BUTTONS) self .btn = wx.Button( self , 1 , "Collapse" , ( 50 , 60 )) # add root to self.tree self .root = self .tree.AddRoot( 'Root' ) # add item to self.root item = self .tree.AppendItem( self .root, 'Item' ) # bind event with self.btn self .btn.Bind(wx.EVT_BUTTON, self .onclick) self .tree.Expand( self .root) sizer = wx.BoxSizer(wx.VERTICAL) sizer.Add( self .tree, 0 , wx.EXPAND) self .SetSizer(sizer) def onclick( self , e): # collapse root self .tree.Collapse( self .root) 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() |
Output Window:
before clicking button
after clicking button
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