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[英]Finding certain child in wxTreeCtrl and updating TreeCtrl in wxPython
[英]Updating treectrl in wxPython
一旦顯示,如何在treectrl中更改或添加項目。 我創建了一個簡單的示例,如何在init之后添加一個額外的項目(例如Bananas)。 在init退出之前對其進行更改即可,但是我希望能夠在顯示Treectrl之后對其進行更新:
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()
我添加了一個按鈕。 如果單擊該按鈕,則Banana(3)將附加到樹上。 詳情請參照注釋(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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