wxPython - wx.TreeCtrl 中的 ExpandAll() 方法
在本文中,我们将学习与 wxPython 的 wx.TreeCtrl 类关联的 ExpandAll() 方法。 ExpandAll() 方法与 Expand() 类似,但唯一的区别是该方法用于展开树控件中存在的所有项目。使用此方法可以看到所有子节点及其父节点。
此方法不需要任何参数。
Syntax: wx.TreeCtrl.ExpandAll(self)
Parameters:
No parameters are required by this method.
代码示例:
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")
# expand all nodes of the tree
self.tree.ExpandAll()
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: