wxPython ListCtrl 项。 设置背景颜色不起作用

Question

我在 MacBook Air M1、macOS Big Sur 上使用 Python3、wxPython 4。 我发现 SetBackgroundColour 方法不起作用，（但是当我调用 item.SetText("888") 时，文本已成功更新）有人知道原因吗？ 谢谢！

import wx
import wx.lib.mixins.listctrl  as  listmix

class MyPanel(wx.Panel):
    def __init__(self, parent):
        wx.Panel.__init__(self, parent)
        self.SetBackgroundColour("white")

        rows = [("Tom", "11"),
                ("Ede", "11"),
                ("Jerry", "10")
                ]
        self.list_ctrl = wx.ListCtrl(self, style=wx.LC_REPORT)
        self.list_ctrl.SetBackgroundColour(wx.Colour(255,246,189,255))
        self.list_ctrl.SetTextColour('black')
        
        self.list_ctrl.InsertColumn(0, "Col1")  
        self.list_ctrl.InsertColumn(1, "Col2")  # Revenue this Q than last Q 

        
        index = 0
        for row in rows:
            self.list_ctrl.InsertStringItem(index, row[0])
            self.list_ctrl.SetStringItem(index, 1, row[1])

            if int(row[1]) <= 10: #current PE is 50% down than 52w high
                item = self.list_ctrl.GetItem(1,1)
                item.SetText("888") # successfully changed
                item.SetBackgroundColour('Blue') #not changed
                self.list_ctrl.SetItem(item)

                print(item.GetText())
                print(item.GetBackgroundColour())

            index += 1
        
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.list_ctrl, 0, wx.ALL|wx.EXPAND, 5)
        self.SetSizer(sizer)
        

class MyFrame(wx.Frame):
    def __init__(self):
        """Constructor"""
        wx.Frame.__init__(self, None, wx.ID_ANY,"test")
        panel = MyPanel(self)
        self.Show()
        
if __name__ == "__main__":
    app = wx.App(False)
    frame = MyFrame()
    app.MainLoop()

Answer 1

这可能看起来违反直觉，但似乎 BackGroundColour 属于 ListCtrl 而不是 ListCtrlItem。
因此，如果您通过 ListCtrl 访问它，它就可以工作。
例如

import wx
import wx.lib.mixins.listctrl  as  listmix

class MyPanel(wx.Panel):
    def __init__(self, parent):
        wx.Panel.__init__(self, parent)
        self.SetBackgroundColour("white")

        rows = [("Tom", "11"),
                ("Ede", "11"),
                ("Jerry", "10")
                ]
        self.list_ctrl = wx.ListCtrl(self, style=wx.LC_REPORT)
        self.list_ctrl.SetBackgroundColour(wx.Colour(255,246,189,255))
        self.list_ctrl.SetTextColour('black')

        self.list_ctrl.InsertColumn(0, "Col1")
        self.list_ctrl.InsertColumn(1, "Col2")  # Revenue this Q than last Q 


        index = 0
        for row in rows:
            self.list_ctrl.InsertStringItem(index, row[0])
            self.list_ctrl.SetStringItem(index, 1, row[1])

            if int(row[1]) <= 10: #current PE is 50% down than 52w high
                item = self.list_ctrl.GetItem(1,1)
                item.SetText("888") # successfully changed
                self.list_ctrl.SetItemBackgroundColour(item.GetId(), 'LightBlue') #not changed
                self.list_ctrl.SetItem(item)
                print(item.GetText())
                print(item.GetBackgroundColour())
                print(self.list_ctrl.GetItemBackgroundColour(item.GetId()))

            index += 1

        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.list_ctrl, 0, wx.ALL|wx.EXPAND, 5)
        self.SetSizer(sizer)


class MyFrame(wx.Frame):
    def __init__(self):
        """Constructor"""
        wx.Frame.__init__(self, None, wx.ID_ANY,"test")
        panel = MyPanel(self)
        self.Show()

if __name__ == "__main__":
    app = wx.App(False)
    frame = MyFrame()
    app.MainLoop()