Question

好的我在这里有一个例子：

可运行示例

解压缩zip文件然后运行，否则它将无法正常工作

然而，当运行时，图像将不会被添加到树ctrl中，它只会出错。

代码（注意不会在没有图像的情况下运行，请参阅上面的zip文件）

import wx

class TestFrame(wx.Frame):

    def __init__(self):
        wx.Frame.__init__(self, None, -1)

        self.tree = wx.TreeCtrl(self, style = wx.TR_HIDE_ROOT)
        self.root = self.tree.AddRoot("")

        gr = self.tree.AppendItem(self.root, "Grooveshark")
        pop_r = self.tree.AppendItem(gr, "Popular")
        sr = self.tree.AppendItem(gr, "Search")

        dr = self.tree.AppendItem(self.root, "Download")

        pr = self.tree.AppendItem(self.root, "Pandora")
        stat_r = self.tree.AppendItem(pr, "Stations")

        image_list = wx.ImageList(16, 16)
        grooveshark = image_list.Add(wx.Image("images/grooveshark (Custom).png", wx.BITMAP_TYPE_PNG).ConvertToBitmap())
        popular     = image_list.Add(wx.Image("images/popular (Custom).png", wx.BITMAP_TYPE_PNG).ConvertToBitmap())
        search      = image_list.Add(wx.Image("images/search (Custom).png", wx.BITMAP_TYPE_PNG).ConvertToBitmap())
        download    = image_list.Add(wx.Image("images/download (Custom).png", wx.BITMAP_TYPE_PNG).ConvertToBitmap())
        pandora     = image_list.Add(wx.Image("images/playlist_icon (Custom).png", wx.BITMAP_TYPE_PNG).ConvertToBitmap())
        stations    = image_list.Add(wx.Image("images/stations (Custom).png", wx.BITMAP_TYPE_PNG).ConvertToBitmap())

        self.tree.SetPyData(gr, None)
        self.tree.SetItemImage(gr, grooveshark, wx.TreeItemIcon_Normal)
        self.tree.SetPyData(pop_r, None)
        self.tree.SetItemImage(pop_r, popular, wx.TreeItemIcon_Normal)
        self.tree.SetPyData(sr, None)
        self.tree.SetItemImage(sr, search, wx.TreeItemIcon_Normal)
        self.tree.SetPyData(dr, None)
        self.tree.SetItemImage(dr, download, wx.TreeItemIcon_Normal)
        self.tree.SetPyData(pr, None)
        self.tree.SetItemImage(pr, pandora, wx.TreeItemIcon_Normal)
        self.tree.SetPyData(stat_r, None)
        self.tree.SetItemImage(stat_r, stations, wx.TreeItemIcon_Normal)


if __name__ == "__main__":
    a = wx.App(False)

    f = TestFrame()
    f.Show()
    a.MainLoop()

为什么？

我在wxPython演示应用程序中关注了演示，但没有运气。

Answer 1

您的代码有两个问题。

并非所有图像都是16像素x 16像素，但您尝试将它们添加到应仅包含16 x 16图像的图像列表中。要解决此问题，您应该在添加到列表之前将它们缩放到16 x 16。
在将图像应用于树项之前，您应该将图像列表分配给树对象。

这是固定代码：

import wx

class TestFrame(wx.Frame):

    def __init__(self):
        wx.Frame.__init__(self, None, -1)

        self.tree = wx.TreeCtrl(self, style = wx.TR_HIDE_ROOT)
        self.root = self.tree.AddRoot("")

        gr = self.tree.AppendItem(self.root, "Grooveshark")
        pop_r = self.tree.AppendItem(gr, "Popular")
        sr = self.tree.AppendItem(gr, "Search")

        dr = self.tree.AppendItem(self.root, "Download")

        pr = self.tree.AppendItem(self.root, "Pandora")
        stat_r = self.tree.AppendItem(pr, "Stations")

        image_list = wx.ImageList(16, 16)
        grooveshark = image_list.Add(wx.Image("images/grooveshark (Custom).png", wx.BITMAP_TYPE_PNG).Scale(16,16).ConvertToBitmap())
        popular     = image_list.Add(wx.Image("images/popular (Custom).png", wx.BITMAP_TYPE_PNG).Scale(16,16).ConvertToBitmap())
        search      = image_list.Add(wx.Image("images/search (Custom).png", wx.BITMAP_TYPE_PNG).Scale(16,16).ConvertToBitmap())
        download    = image_list.Add(wx.Image("images/download (Custom).png", wx.BITMAP_TYPE_PNG).Scale(16,16).ConvertToBitmap())
        pandora     = image_list.Add(wx.Image("images/playlist_icon (Custom).png", wx.BITMAP_TYPE_PNG).Scale(16,16).ConvertToBitmap())
        stations    = image_list.Add(wx.Image("images/stations (Custom).png", wx.BITMAP_TYPE_PNG).Scale(16,16).ConvertToBitmap())

        self.tree.AssignImageList(image_list)

        self.tree.SetPyData(gr, None)
        self.tree.SetItemImage(gr, grooveshark, wx.TreeItemIcon_Normal)
        self.tree.SetPyData(pop_r, None)
        self.tree.SetItemImage(pop_r, popular, wx.TreeItemIcon_Normal)
        self.tree.SetPyData(sr, None)
        self.tree.SetItemImage(sr, search, wx.TreeItemIcon_Normal)
        self.tree.SetPyData(dr, None)
        self.tree.SetItemImage(dr, download, wx.TreeItemIcon_Normal)
        self.tree.SetPyData(pr, None)
        self.tree.SetItemImage(pr, pandora, wx.TreeItemIcon_Normal)
        self.tree.SetPyData(stat_r, None)
        self.tree.SetItemImage(stat_r, stations, wx.TreeItemIcon_Normal)


if __name__ == "__main__":
    a = wx.App(False)

    f = TestFrame()
    f.Show()
    a.MainLoop()

wxpython树ctrl图像

1 个答案: