wxpython tree ctrl 图片

Question

好的，我这里有一个示例：

可运行示例

示例

提取 zip 文件，然后运行，否则根本无法工作

但是，运行时图像不会添加到树 ctrl 中，并且只会出错。

代码（注意如果没有图像就无法运行，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？

我按照 wxPython 演示应用程序中的演示进行操作，但没有成功。

Answer 1

您的代码有两个问题。

1. 并非所有图像都是 16 像素 x 16 像素，但您正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。

2. 在将图像应用于树项目之前，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()