wxPython：检查树节点是否有焦点（TreeCtrl）

Question

不要被代码吓倒。这真的很简单。 （如果你想运行它）

我正在尝试找出一种在树节点具有焦点时做某事的方法。我知道如果 TreeCtrl 有焦点，我是否想做某事，那么它将是：

self.tree.Bind(wx.EVT_SET_FOCUS, some_function)

但我不想要那个，我想要它作为树节点。有什么帮助吗？

对于我的应用程序，每个选定的树节点都会显示一个弹出窗口，如果树节点失去焦点，它就会消失。

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()

Answer 1

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())