[英]Updating treectrl in wxPython
How can I alter or add items in a treectrl once it has been displayed. 一旦显示,如何在treectrl中更改或添加项目。 I've created a simple example, how would I add an extra item (Eg Bananas) after init .
我创建了一个简单的示例,如何在init之后添加一个额外的项目(例如Bananas)。 Changing it before init exits works but I want to be able to update the treectrl after it's already been displayed:
在init退出之前对其进行更改即可,但是我希望能够在显示Treectrl之后对其进行更新:
import wx
class TreeFrame(wx.Frame):
def __init__(self):
wx.Frame.__init__(self, None, title='TreeCtrl')
tree_ctrl = wx.TreeCtrl(self, -1, style=wx.TR_DEFAULT_STYLE | \
wx.TR_FULL_ROW_HIGHLIGHT | \
wx.TR_EDIT_LABELS)
# Add the tree root
root = tree_ctrl.AddRoot('Food')
tree_ctrl.AppendItem(root,'Fruit (3)')
tree_ctrl.AppendItem(tree_ctrl.GetLastChild(root),'Apple (1)')
tree_ctrl.AppendItem(tree_ctrl.GetLastChild(root),'Orange (2)')
tree_ctrl.ExpandAll()
self.Centre()
# So how can I change the treectrl above after _init_ .
# E.g. Add bananas
print 'do something'
if __name__ == '__main__':
app = wx.App(0)
frame = TreeFrame()
frame.Show()
app.MainLoop()
I added a button. 我添加了一个按钮。 If you click the button, Banana(3) will be appended to tree.
如果单击该按钮,则Banana(3)将附加到树上。 For detail, see comment (esp.
NOTE:
) 详情请参照注释(ESP。
NOTE:
)
import wx
class TreeFrame(wx.Frame):
def __init__(self):
wx.Frame.__init__(self, None, title='TreeCtrl')
tree_ctrl = wx.TreeCtrl(self, -1, style=wx.TR_DEFAULT_STYLE | \
wx.TR_FULL_ROW_HIGHLIGHT | \
wx.TR_EDIT_LABELS)
# NOTE: Bind callback which will be called when the button is clicked.
button = wx.Button(self, -1, label='Add banana')
button.Bind(wx.EVT_BUTTON, self.add_banana)
# NOTE sizer
sizer = wx.BoxSizer(wx.VERTICAL)
sizer.Add(tree_ctrl, 1, wx.EXPAND|wx.ALL)
sizer.Add(button, 0, wx.EXPAND|wx.ALL)
self.SetSizer(sizer)
# Add the tree root
root = tree_ctrl.AddRoot('Food')
tree_ctrl.AppendItem(root,'Fruit (3)')
tree_ctrl.AppendItem(tree_ctrl.GetLastChild(root),'Apple (1)')
tree_ctrl.AppendItem(tree_ctrl.GetLastChild(root),'Orange (2)')
tree_ctrl.ExpandAll()
self.Centre()
# NOTE: Save tree_ctrl, root as attribute
# to make them available in add_banana method.
self.tree_ctrl = tree_ctrl
self.root = root
# called when the button is clicked.
def add_banana(self, evt):
self.tree_ctrl.AppendItem(self.tree_ctrl.GetLastChild(self.root), 'Banana (3)')
if __name__ == '__main__':
app = wx.App(0)
frame = TreeFrame()
frame.Show()
app.MainLoop()
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