Treectrl wxpython

Question

我试图在我的面板中创建一个树形 ctrl 组件，但是当我运行代码时，我没有看到任何操作。

代码

import wx

class MyTreeCtrl(wx.TreeCtrl):
    def __init__(self, parent, id, pos, size, style):
        wx.TreeCtrl.__init__(self, parent, id, pos, size, style)



class Example(wx.Frame):

    def __init__(self, parent, title):
        super(Example, self).__init__(parent, title=title, 
        size=(700, 700))
        tID = wx.NewId()
        self.tree = MyTreeCtrl(self,tId,wx.DefaultPosition,wx.DefaultSize,wx.TR_DEFAULT_SIZE)
        isz = (16,16)
        il = wx.ImageList(isz[0], isz[1])
        fldridx     = il.Add(wx.ArtProvider_GetBitmap(wx.ART_FOLDER,      wx.ART_OTHER, isz))
        fldropenidx = il.Add(wx.ArtProvider_GetBitmap(wx.ART_FILE_OPEN,   wx.ART_OTHER, isz))
        fileidx     = il.Add(wx.ArtProvider_GetBitmap(wx.ART_NORMAL_FILE, wx.ART_OTHER, isz))
        smileidx    = il.Add(images.Smiles.GetBitmap())

        self.tree.SetImageList(il)
        self.il = il

        # NOTE:  For some reason tree items have to have a data object in
        #        order to be sorted.  Since our compare just uses the labels
        #        we don't need any real data, so we'll just use None below for
        #        the item data.

        self.root = self.tree.AddRoot("The Root Item")
        self.tree.SetPyData(self.root, None)
        self.tree.SetItemImage(self.root, fldridx, wx.TreeItemIcon_Normal)
        self.tree.SetItemImage(self.root, fldropenidx, wx.TreeItemIcon_Expanded)


        for x in range(15):
            child = self.tree.AppendItem(self.root, "Item %d" % x)
            self.tree.SetPyData(child, None)
            self.tree.SetItemImage(child, fldridx, wx.TreeItemIcon_Normal)
            self.tree.SetItemImage(child, fldropenidx, wx.TreeItemIcon_Expanded)

            for y in range(5):
                last = self.tree.AppendItem(child, "item %d-%s" % (x, chr(ord("a")+y)))
                self.tree.SetPyData(last, None)
                self.tree.SetItemImage(last, fldridx, wx.TreeItemIcon_Normal)
                self.tree.SetItemImage(last, fldropenidx, wx.TreeItemIcon_Expanded)

                for z in range(5):
                    item = self.tree.AppendItem(last,  "item %d-%s-%d" % (x, chr(ord("a")+y), z))
                    self.tree.SetPyData(item, None)
                    self.tree.SetItemImage(item, fileidx, wx.TreeItemIcon_Normal)
                    self.tree.SetItemImage(item, smileidx, wx.TreeItemIcon_Selected)

        print self.tree
        self.InitUI()
        self.Centre()
        self.Show() 


    def InitUI(self):

        panel = wx.Panel(self)
        panel.SetBackgroundColour('#4f5049')

        vbox = wx.BoxSizer(wx.VERTICAL)

        #midPan = wx.Panel(panel)
        #midPan.SetBackgroundColour('#ededed')

        vbox.Add(self.tree, 1, wx.EXPAND | wx.ALL, 20)
        panel.SetSizer(vbox)


if __name__ == '__main__':
        app = wx.App()
        Example(None,title="Border")
        app.MainLoop()

Answer 1

嗯，我明白为什么了。该代码以其当前形式无法运行。 “tId”是一个未定义的变量，wx.TR_DEFAULT_SIZE 不是一个真正的样式标志。您还引用了“图像”模块，但没有导入它。有一个可运行的例子会很好。

你也不是真的在问问题。什么不工作？当我编辑代码以使其运行时，我得到了这样的结果：

import wx

class MyTreeCtrl(wx.TreeCtrl):
    def __init__(self, parent, id, pos, size, style):
        wx.TreeCtrl.__init__(self, parent, id, pos, size, style)



class Example(wx.Frame):

    def __init__(self, parent, title):
        super(Example, self).__init__(parent, title=title, 
        size=(700, 700))
        tID = wx.NewId()
        self.tree = MyTreeCtrl(self,tID,wx.DefaultPosition,wx.DefaultSize,wx.TR_HAS_BUTTONS)
        isz = (16,16)
        il = wx.ImageList(isz[0], isz[1])
        fldridx     = il.Add(wx.ArtProvider_GetBitmap(wx.ART_FOLDER,      wx.ART_OTHER, isz))
        fldropenidx = il.Add(wx.ArtProvider_GetBitmap(wx.ART_FILE_OPEN,   wx.ART_OTHER, isz))
        fileidx     = il.Add(wx.ArtProvider_GetBitmap(wx.ART_NORMAL_FILE, wx.ART_OTHER, isz))


        self.tree.SetImageList(il)
        self.il = il

        # NOTE:  For some reason tree items have to have a data object in
        #        order to be sorted.  Since our compare just uses the labels
        #        we don't need any real data, so we'll just use None below for
        #        the item data.

        self.root = self.tree.AddRoot("The Root Item")
        self.tree.SetPyData(self.root, None)
        self.tree.SetItemImage(self.root, fldridx, wx.TreeItemIcon_Normal)
        self.tree.SetItemImage(self.root, fldropenidx, wx.TreeItemIcon_Expanded)


        for x in range(15):
            child = self.tree.AppendItem(self.root, "Item %d" % x)
            self.tree.SetPyData(child, None)
            self.tree.SetItemImage(child, fldridx, wx.TreeItemIcon_Normal)
            self.tree.SetItemImage(child, fldropenidx, wx.TreeItemIcon_Expanded)

            for y in range(5):
                last = self.tree.AppendItem(child, "item %d-%s" % (x, chr(ord("a")+y)))
                self.tree.SetPyData(last, None)
                self.tree.SetItemImage(last, fldridx, wx.TreeItemIcon_Normal)
                self.tree.SetItemImage(last, fldropenidx, wx.TreeItemIcon_Expanded)

                for z in range(5):
                    item = self.tree.AppendItem(last,  "item %d-%s-%d" % (x, chr(ord("a")+y), z))
                    self.tree.SetPyData(item, None)
                    self.tree.SetItemImage(item, fileidx, wx.TreeItemIcon_Normal)
                    #self.tree.SetItemImage(item, smileidx, wx.TreeItemIcon_Selected)

        print self.tree
        self.InitUI()
        self.Centre()
        self.Show() 


    def InitUI(self):

        panel = wx.Panel(self)
        panel.SetBackgroundColour('#4f5049')

        vbox = wx.BoxSizer(wx.VERTICAL)

        #midPan = wx.Panel(panel)
        #midPan.SetBackgroundColour('#ededed')

        vbox.Add(self.tree, 1, wx.EXPAND | wx.ALL, 20)
        panel.SetSizer(vbox)


if __name__ == '__main__':
        app = wx.App()
        Example(None,title="Border")
        app.MainLoop()

这会将树控件创建为左上角的一个小框。下一个问题是您将面板堆叠在 treectrl 的顶部，因为您将两个小部件的框架作为其父级，并且您首先创建了 treectrl。我重新排列了您的代码，以使面板成为 treectrl 的父级。见下文：

import wx

class MyTreeCtrl(wx.TreeCtrl):
    def __init__(self, parent, id, pos, size, style):
        wx.TreeCtrl.__init__(self, parent, id, pos, size, style)



class Example(wx.Frame):

    def __init__(self, parent, title):
        super(Example, self).__init__(parent, title=title, size=(700, 700))

        panel = wx.Panel(self)
        panel.SetBackgroundColour('#4f5049')

        vbox = wx.BoxSizer(wx.VERTICAL)

        tID = wx.NewId()
        self.tree = MyTreeCtrl(panel,tID,wx.DefaultPosition,wx.DefaultSize,wx.TR_HAS_BUTTONS)
        vbox.Add(self.tree, 1, wx.EXPAND | wx.ALL, 20)
        panel.SetSizer(vbox)

        isz = (16,16)
        il = wx.ImageList(isz[0], isz[1])
        fldridx     = il.Add(wx.ArtProvider_GetBitmap(wx.ART_FOLDER,      wx.ART_OTHER, isz))
        fldropenidx = il.Add(wx.ArtProvider_GetBitmap(wx.ART_FILE_OPEN,   wx.ART_OTHER, isz))
        fileidx     = il.Add(wx.ArtProvider_GetBitmap(wx.ART_NORMAL_FILE, wx.ART_OTHER, isz))


        self.tree.SetImageList(il)
        self.il = il

        # NOTE:  For some reason tree items have to have a data object in
        #        order to be sorted.  Since our compare just uses the labels
        #        we don't need any real data, so we'll just use None below for
        #        the item data.

        self.root = self.tree.AddRoot("The Root Item")
        self.tree.SetPyData(self.root, None)
        self.tree.SetItemImage(self.root, fldridx, wx.TreeItemIcon_Normal)
        self.tree.SetItemImage(self.root, fldropenidx, wx.TreeItemIcon_Expanded)


        for x in range(15):
            child = self.tree.AppendItem(self.root, "Item %d" % x)
            self.tree.SetPyData(child, None)
            self.tree.SetItemImage(child, fldridx, wx.TreeItemIcon_Normal)
            self.tree.SetItemImage(child, fldropenidx, wx.TreeItemIcon_Expanded)

            for y in range(5):
                last = self.tree.AppendItem(child, "item %d-%s" % (x, chr(ord("a")+y)))
                self.tree.SetPyData(last, None)
                self.tree.SetItemImage(last, fldridx, wx.TreeItemIcon_Normal)
                self.tree.SetItemImage(last, fldropenidx, wx.TreeItemIcon_Expanded)

                for z in range(5):
                    item = self.tree.AppendItem(last,  "item %d-%s-%d" % (x, chr(ord("a")+y), z))
                    self.tree.SetPyData(item, None)
                    self.tree.SetItemImage(item, fileidx, wx.TreeItemIcon_Normal)
                    #self.tree.SetItemImage(item, smileidx, wx.TreeItemIcon_Selected)

        print self.tree
        self.Centre()
        self.Show() 

if __name__ == '__main__':
        app = wx.App()
        Example(None,title="Border")
        app.MainLoop()