[英]wxPython: Check if tree node has focus (TreeCtrl)
不要被代碼嚇到。 這真的很簡單。 (如果需要,請運行)
我試圖找出一種方法,當樹節點具有焦點時。 我知道,如果TreeCtrl擁有焦點,我是否想做點什么,那就是:
self.tree.Bind(wx.EVT_SET_FOCUS,some_function)
但是我不想要,我想要樹節點。 有什么幫助嗎?
對於我的應用程序,將為每個選定的樹節點顯示一個彈出窗口,如果樹節點失去焦點,該窗口將消失。
import wx
class MyFrame(wx.Frame):
def __init__(self, parent, id, title):
wx.Frame.__init__(self, parent, id, title, wx.DefaultPosition, wx.Size(600, 400))
self.splitter = wx.SplitterWindow(self, -1)
self.leftPanel = wx.Panel(self.splitter, -1)
self.tree = MyTree(self.leftPanel, 1, wx.DefaultPosition, (300, 300))
self.tree.Bind(wx.EVT_TREE_SEL_CHANGED, self.OnSelChanged, id=1)
self.rightPanel = wx.Panel(self.splitter, -1)
self.splitter.SplitVertically(self.leftPanel, self.rightPanel)
sizer = wx.BoxSizer ( )
sizer.Add ( self.splitter, 1, wx.EXPAND )
self.SetSizer ( sizer )
self.tree.SetFocus()
def OnSelChanged(self, event):
print 'Sel Changed'
class MyTree(wx.TreeCtrl):
def __init__(self, panel, id, pos, size):
self.panel = panel
wx.TreeCtrl.__init__(self, panel, id, pos=pos, size=size, style=wx.TR_HAS_BUTTONS)
wx.EVT_TREE_ITEM_EXPANDING(self,-1,self.OnItemExpanding)
wx.EVT_TREE_ITEM_COLLAPSED(self,-1,self.OnItemCollapsed)
wx.EVT_SET_FOCUS(self,self.OnGotFocus)
self.root = self.AddRoot('Root')
self.SetPyData(self.root,0)
self.SetItemHasChildren(self.root)
self.Expand(self.root)
self.SetImageList(wx.ImageList(16,16))
def OnItemExpanding(self,evt):
node = evt.GetItem()
data = self.GetPyData(node)
if data:
for i in range(1,2):
leaf = self.AppendItem(node,'%s.%s' % (data,i))
self.SetPyData(leaf,'%s.%s' % (data,i))
else:
for i in range(1,2):
leaf = self.AppendItem(node,'%s' % (i))
self.SetPyData(leaf,'%s' % (i))
self.SetItemHasChildren(leaf)
def OnItemCollapsed(self,evt):
self.DeleteChildren(evt.GetItem())
def OnGotFocus(self,evt):
print 'tree got focus'
evt.Skip()
class MyApp(wx.App):
def OnInit(self):
frame = MyFrame(None, -1, "This is a test")
frame.Show(True)
self.SetTopWindow(frame)
return True
app = MyApp(0)
app.MainLoop()
我相信你想要
...
self.tree.Bind(wx.EVT_TREE_SEL_CHANGED,self.OnTreeSelectionChange)
self.tree.Bind(wx.EVT_KILL_FOCUS,self.OnKillTreeFocus)
...
def OnTreeSelectionChange(self, evt):
print "OnSelChanged: ", self.GetItemText(evt.GetItem())
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