删除行后wxPython UltimateListCtrl错误 [英] wxPython UltimateListCtrl Error After Deleting Row

问题描述

我一直在使用 wxPython 和 UltimateListCtrl 为项目创建 GUI.对于我的 GUI，有几个面板具有 UltimateListCtrls，并且我遇到了一个我似乎无法解决的问题.我的 GUI 包含一个包含 5 列的文件列表:一个复选框列、一个文件名列、一个文件扩展名列、一个文件大小列和一个组合框列.GUI 示例在列表下方，我有一个按钮，单击该按钮将删除选中复选框的任何行.例如，在删除第 1 行并单击最后一行的 CheckBox 或 ComboBox 后，我的问题就出现了.当我这样做时，我收到此错误:

I have been working with wxPython and UltimateListCtrl to create a GUI for a project. For my GUI is have a few panels that have UltimateListCtrls and have I run into an issue I cant seem to fix. My GUI consists of a list of files with 5 columns: a CheckBox Column, a File Name Column, a File Extension Column, a File Size Column, and a ComboBox Column. Example GUI Below the list I have a button that, when clicked, will delete any row whose CheckBox is checked. My issue comes after I delete, for example, row 1 and click on either the CheckBox or the ComboBox for the last row. When I do I receive this error:

回溯(最近一次调用最后一次):OnSetFocus 中的文件C:\Users\Media_i5\PycharmProjects\PicThings\venv\lib\site-packages\wx\lib\agw\ultimatelistctrl.py"，第 2260 行select = listCtrl.GetItemState(self._itemId, ULC_STATE_SELECTED)GetItemState 中的文件C:\Users\Media_i5\PycharmProjects\PicThings\venv\lib\site-packages\wx\lib\agw\ultimatelistctrl.py"，第 8944 行引发异常(GetItemState 中的项目索引无效")异常:GetItemState 中的项目索引无效

Traceback (most recent call last): File "C:\Users\Media_i5\PycharmProjects\PicThings\venv\lib\site-packages\wx\lib\agw\ultimatelistctrl.py", line 2260, in OnSetFocus select = listCtrl.GetItemState(self._itemId, ULC_STATE_SELECTED) File "C:\Users\Media_i5\PycharmProjects\PicThings\venv\lib\site-packages\wx\lib\agw\ultimatelistctrl.py", line 8944, in GetItemState raise Exception("invalid item index in GetItemState") Exception: invalid item index in GetItemState

当我回溯调用时，我发现当我删除一行时，后续每一行的 ID/索引都会更新以匹配其在列表中的新位置，但 CheckBox 的 ID/索引不是.在下面的示例代码中，当索引 1(第 2 行)处的行被删除时，索引 2 处的行变为索引 1，索引 3 变为索引 2，等等......但是移动到索​​引的行上的复选框/组合框1 的 ID/Index 仍为 2.在这种情况下，删除第 1 行后，如果单击最后一行的 CheckBox/ComboBox，则会标记上述错误，因为 Box 的索引大于行.

When I trace back the calls I find that when I delete a row, the ID/Index for each following row is updated to match its new position on the list, but the ID/Index for the CheckBox, ComboBox is not. In the example code below, when the row at index 1 (row 2) is deleted, the row at index 2 becomes index 1, index 3 becomes index 2, etc... However the Checkbox/ComboBox on the row that moved to index 1 still has an ID/Index of 2. In this scenario, after row 1 is deleted, if you click on the CheckBox/ComboBox on the last row, the error above is flagged because the index for the Box is larger than the number of rows.

我希望这是有道理的.下面附上一个小示例代码，它说明了这个问题.运行代码，单击图 1 的复选框，单击清除按钮，然后单击图 7 的复选框.

I hope this makes sense. Attached below is a small example code the illustrates the issue. Run the code, click the CheckBox for Picture 1, Click the Clear Button, then Click the CheckBox for Picture 7.

谁能帮我弄清楚为什么盒子的 ID/索引没有像行一样自动更新?

Can anyone help me figure out why the ID/Index for the Boxes are not updating automatically like the row?

import wx
from wx.lib.agw import ultimatelistctrl as ULC

class Mywin(wx.Frame):
    t_col1 = ['PICTURE 1', 'PICTURE 2', 'PICTURE 3', 'PICTURE 4', 'PICTURE 5', 'PICTURE 6', 'PICTURE 7']
    t_col4 = ['1', '1', '3', '5', '5', '1', '2']

    def __init__(self, parent, title):
        wx.Frame.__init__(self, parent)
        box2 = wx.BoxSizer(wx.VERTICAL)
        title = wx.StaticText(self, wx.ID_ANY, label='Pictures On Frame:')
        box2.Add(title, 0, wx.ALL, 5)
        self.list = ULC.UltimateListCtrl(self, agwStyle = ULC.ULC_REPORT | ULC.ULC_HAS_VARIABLE_ROW_HEIGHT)
        colhead = ["", "File", "Ext", "Size", "Rating"]
        colwidth = [30, 300, 45, 45, 45]
        for x in range(0, len(colhead)):
            self.list.InsertColumn(x, colhead[x], width=colwidth[x])
        box2.Add(self.list, 1, wx.EXPAND)
        btnSizer2 = wx.BoxSizer(wx.HORIZONTAL)
        btnC = wx.Button(self, label="Clear")
        btnC.Bind(wx.EVT_BUTTON, self.on_clear)
        btnSizer2.Add(btnC, 0, wx.ALL | wx.CENTER, 5)
        box2.Add(btnSizer2, 1, wx.EXPAND)
        self.SetSizer(box2)
        self.SetTitle('Picture Frame Selector')
        self.Centre()
        self.Maximize()
        self.Show()
        rb_list = ["1", "2", "3", "4", "5"]
        for x in range(0 , len(self.t_col1)):
            self.list.InsertStringItem(x, '')
            cBox = wx.CheckBox(self.list)
            self.list.SetItemWindow(x, 0, cBox)
            self.list.SetStringItem(x, 1, self.t_col1[x])
            self.list.SetStringItem(x, 2, '.jpg')
            dBox = wx.ComboBox(self.list, value=self.t_col4[x], choices=rb_list, style=wx.CB_READONLY)
            self.list.SetItemWindow(x, 4, dBox, expand=True)

    def on_clear(self, event):
        t = 0
        for x in range(0, len(self.t_col1)):
            if self.list.GetItemWindow(t, 0).IsChecked():
                self.list.DeleteItem(t)
            else:
                t += 1
        event.Skip()

if __name__ == "__main__":
    ex = wx.App()
    Mywin(None, 'Row Delete Issue')
    ex.MainLoop()

推荐答案

您可以通过使用 list t_col1 重新构建 listctrl 来解决此问题.

You can get around this issue by rebuilding the listctrl using the list t_col1.

import wx
from wx.lib.agw import ultimatelistctrl as ULC

class Mywin(wx.Frame):
    t_col1 = ['PICTURE 1', 'PICTURE 2', 'PICTURE 3', 'PICTURE 4', 'PICTURE 5', 'PICTURE 6', 'PICTURE 7']
    t_col4 = ['1', '1', '3', '5', '5', '1', '2']

    def __init__(self, parent, title):
        wx.Frame.__init__(self, parent)
        box2 = wx.BoxSizer(wx.VERTICAL)
        title = wx.StaticText(self, wx.ID_ANY, label='Pictures On Frame:')
        box2.Add(title, 0, wx.ALL, 5)
        self.list = ULC.UltimateListCtrl(self, agwStyle = ULC.ULC_REPORT | ULC.ULC_HAS_VARIABLE_ROW_HEIGHT)
        colhead = ["", "File", "Ext", "Size", "Rating"]
        colwidth = [30, 300, 45, 45, 45]
        for x in range(0, len(colhead)):
            self.list.InsertColumn(x, colhead[x], width=colwidth[x])
        box2.Add(self.list, 1, wx.EXPAND)
        btnSizer2 = wx.BoxSizer(wx.HORIZONTAL)
        btnC = wx.Button(self, label="Clear")
        btnC.Bind(wx.EVT_BUTTON, self.on_clear)
        btnSizer2.Add(btnC, 0, wx.ALL | wx.CENTER, 5)
        box2.Add(btnSizer2, 1, wx.EXPAND)
        self.SetSizer(box2)
        self.SetTitle('Picture Frame Selector')
        self.Centre()
        self.Maximize()
        self.CreateList()
        self.Show()

    def CreateList(self):
        rb_list = ["1", "2", "3", "4", "5"]
        for x in range(0 , len(self.t_col1)):
            self.list.InsertStringItem(x, '')
            cBox = wx.CheckBox(self.list)
            self.list.SetItemWindow(x, 0, cBox)
            self.list.SetStringItem(x, 1, self.t_col1[x])
            self.list.SetStringItem(x, 2, '.jpg')
            dBox = wx.ComboBox(self.list, value=self.t_col4[x], choices=rb_list, style=wx.CB_READONLY)
            self.list.SetItemWindow(x, 4, dBox, expand=True)

    def on_clear(self, event):
        for x in range(len(self.t_col1) -1 , -1, -1):
            if self.list.GetItemWindow(x, 0).IsChecked():
                self.t_col1.pop(x)
        self.list.DeleteAllItems()
        self.CreateList()
        event.Skip()

if __name__ == "__main__":
    ex = wx.App()
    Mywin(None, 'Row Delete Issue')
    ex.MainLoop()

请注意，出于显而易见的原因，项目从列表中反向删除，我使用 list.pop() 以便我可以使用 range 中的位置而不是list.remove()
我不允许在 Rating 列下保存对 choices 所做的更改.

Note that items are removed from the list in reverse, for obvious reasons and I use list.pop() so that I can use its position from range rather than list.remove()
I have not allowed for saving changes made to choices under the Rating column.

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