删除ListCtrl Python中的项

Question

如何在Python中清除list ctrl？你知道吗

例如，当我插入10的项目时，前8个项目将从listCtrl中删除，并且可以继续在listCtrl中输入项目。你知道吗

我该怎么做？你知道吗

示例：

我插入：1,2,3,4,5,6,7,8,9,10在我在列表中看到的10项之后CTRL仅8,9,10，我可以再次插入项。你知道吗

我在示例中添加了一些代码。你知道吗

import wx
import wx.gizmos as gizmos
import time
import datetime
from datetime import timedelta

class CWindow(wx.Frame):

    def __init__(self, parent, id, title):

        wx.Frame.__init__(self, parent, id, title, style = wx.DEFAULT_FRAME_STYLE & ~ wx.CLOSE_BOX ^ wx.MAXIMIZE_BOX ^ wx.RESIZE_BORDER, size=(600,500))

        dataCorrente = datetime.datetime.now()


        self.Panel = wx.Panel(self, -1)
        self.index = 0

        self.ceck = {}
        self.ts = ""


        self.CTesto = wx.TextCtrl(self.Panel, 1, pos=(10,40), style=wx.TE_PROCESS_ENTER)
        self.CTesto.Bind(wx.EVT_TEXT_ENTER,self.add_line)

        self.BtnConferma = wx.Button(self.Panel, 12, "Conferma", pos=(130,38))

        self.list_ctrl = wx.ListCtrl(self.Panel, pos=(10,90),size=(-1,330),style=wx.LC_REPORT|wx.BORDER_SUNKEN)
        self.list_ctrl.InsertColumn(0, 'Name')
        self.list_ctrl.InsertColumn(1, 'Start')
        self.list_ctrl.InsertColumn(2, 'Finish', width=100)

        wx.Button(self.Panel, 22, "Exit", pos=wx.Point(470,400))

        self.Bind(wx.EVT_BUTTON, self.close, id=22)

        self.Bind(wx.EVT_BUTTON, self.add_line, self.BtnConferma, id=12)

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


        self.led = gizmos.LEDNumberCtrl(self.Panel, -1, pos = (350,25), size = (200,50), style = gizmos.LED_ALIGN_CENTER)
        self.led.SetBackgroundColour("#c0c0c0")
        self.led.SetForegroundColour("black")
        self.OnTimer(None)
        self.timer = wx.Timer(self, -1)
        self.timer.Start(1000)
        self.Bind(wx.EVT_TIMER, self.OnTimer)
        style = gizmos.LED_ALIGN_CENTER


    def OnTimer(self, event):

        current = time.localtime(time.time())
        self.ts = time.strftime("%H:%M:%S", current)
        self.led.SetValue(self.ts)

        if self.ts in self.ceck:
            self.list_ctrl.SetItemTextColour(self.ceck.get(self.ts), wx.WHITE)
            self.list_ctrl.SetItemBackgroundColour(self.ceck.pop(self.ts), wx.RED)


    def add_line(self,event):

        val = str(self.CTesto.GetValue())

        if val== '':

            msg = wx.MessageDialog(self, "Error", "Error", wx.OK| wx.ICON_ERROR)
            msg.ShowModal()
            msg.Destroy()

        else:

            if self.list_ctrl.GetItemCount() == 10:
                for i in range(7):
                    self.list_ctrl.DeleteItem(1)

            dataCorrente = datetime.datetime.now()
            oraAttuale =(dataCorrente.strftime("%H:%M:%S"))
            plus = (datetime.datetime.strptime(oraAttuale, "%H:%M:%S") + datetime.timedelta(minutes=1))
            global plus2
            plus2 = plus.strftime("%H:%M:%S")

            if plus2 in self.ceck:
                msg = wx.MessageDialog(self, "Duplicate Time", "Error", wx.OK| wx.ICON_ERROR)
                msg.ShowModal()
                msg.Destroy()
                return

            self.list_ctrl.InsertItem(self.index, val)
            self.list_ctrl.SetItem(self.index, 1, oraAttuale)
            self.list_ctrl.SetItem(self.index, 2, str(plus2))
            self.index += 1
            InsVal = (val + " - " + oraAttuale + " - " + plus2 + '\n')
            self.CTesto.Clear()
            self.ceck[plus2] = self.index -1


    def close(self,event):

        hDialog=wx.MessageDialog(self, "°°°", "Exit", wx.OK|wx.CANCEL| wx.ICON_EXCLAMATION)
        rispostaDialog=hDialog.ShowModal()
        hDialog.Destroy()

        if rispostaDialog == wx.ID_OK:
            self.Destroy()


app = wx.App()  
frame = CWindow(None, -1, "Example")
frame.Show()
frame.Center()
app.MainLoop()

Answer 1

您似乎回到了（从原来的帖子）让listctrl项按条目顺序排列，而不是按相反的条目顺序排列。这意味着您必须再次删除索引0而不是索引1。
如果只删除了其中的7个条目，那么字典值现在是无效的，这也是不允许的。如果项目已被删除，则必须将其删除；如果保留，则必须重置为新的索引值。
试试这个，看看它是否能让你更接近你想要达到的目标：

import wx
import wx.gizmos as gizmos
import time
import datetime
from datetime import timedelta

class CWindow(wx.Frame):

    def __init__(self, parent, id, title):

        wx.Frame.__init__(self, parent, id, title, style = wx.DEFAULT_FRAME_STYLE & ~ wx.CLOSE_BOX ^ wx.MAXIMIZE_BOX ^ wx.RESIZE_BORDER, size=(600,500))

        dataCorrente = datetime.datetime.now()


        self.Panel = wx.Panel(self, -1)
        self.index = 0

        self.ceck = {}
        self.ts = ""


        self.CTesto = wx.TextCtrl(self.Panel, 1, pos=(10,40), style=wx.TE_PROCESS_ENTER)
        self.CTesto.Bind(wx.EVT_TEXT_ENTER,self.add_line)

        self.BtnConferma = wx.Button(self.Panel, 12, "Conferma", pos=(130,38))

        self.list_ctrl = wx.ListCtrl(self.Panel, pos=(10,90),size=(-1,330),style=wx.LC_REPORT|wx.BORDER_SUNKEN)
        self.list_ctrl.InsertColumn(0, 'Name')
        self.list_ctrl.InsertColumn(1, 'Start')
        self.list_ctrl.InsertColumn(2, 'Finish', width=100)

        wx.Button(self.Panel, 22, "Exit", pos=wx.Point(470,400))

        self.Bind(wx.EVT_BUTTON, self.close, id=22)

        self.Bind(wx.EVT_BUTTON, self.add_line, self.BtnConferma, id=12)

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


        self.led = gizmos.LEDNumberCtrl(self.Panel, -1, pos = (350,25), size = (200,50), style = gizmos.LED_ALIGN_CENTER)
        self.led.SetBackgroundColour("#c0c0c0")
        self.led.SetForegroundColour("black")
        self.OnTimer(None)
        self.timer = wx.Timer(self, -1)
        self.timer.Start(1000)
        self.Bind(wx.EVT_TIMER, self.OnTimer)
        style = gizmos.LED_ALIGN_CENTER


    def OnTimer(self, event):

        current = time.localtime(time.time())
        self.ts = time.strftime("%H:%M:%S", current)
        self.led.SetValue(self.ts)

        if self.ts in self.ceck:
            self.list_ctrl.SetItemTextColour(self.ceck.get(self.ts), wx.WHITE)
            self.list_ctrl.SetItemBackgroundColour(self.ceck.pop(self.ts), wx.RED)


    def add_line(self,event):

        val = str(self.CTesto.GetValue())

        if val== '':

            msg = wx.MessageDialog(self, "Error", "Error", wx.OK| wx.ICON_ERROR)
            msg.ShowModal()
            msg.Destroy()

        else:

            if self.list_ctrl.GetItemCount() == 10:
                for i in range(7):
                    d = self.list_ctrl.GetItem(0,2)
                    del_text = d.GetText()
                    #remove the dictionary values for the items being deleted
                    try: # It may already have been popped from the dict if the colour was changed
                        self.ceck.pop(del_text)
                    except:
                        pass
                    self.list_ctrl.DeleteItem(0)
                    self.index -= 1
                #reset the dictionary vales for the existing ctrl items they have new index values
                new_idx = 0
                for i in range (3):
                    item = self.list_ctrl.GetItemText(i,2)
                    self.ceck[item] = new_idx
                    new_idx += 1

            dataCorrente = datetime.datetime.now()
            oraAttuale =(dataCorrente.strftime("%H:%M:%S"))
            plus = (datetime.datetime.strptime(oraAttuale, "%H:%M:%S") + datetime.timedelta(minutes=1))
            global plus2
            plus2 = plus.strftime("%H:%M:%S")

            if plus2 in self.ceck:
                msg = wx.MessageDialog(self, "Duplicate Time", "Error", wx.OK| wx.ICON_ERROR)
                msg.ShowModal()
                msg.Destroy()
                return

            self.list_ctrl.InsertItem(self.index, val)
            self.list_ctrl.SetItem(self.index, 1, oraAttuale)
            self.list_ctrl.SetItem(self.index, 2, str(plus2))
            self.index += 1
            InsVal = (val + " - " + oraAttuale + " - " + plus2 + '\n')
            self.CTesto.Clear()
            self.ceck[plus2] = self.index -1


    def close(self,event):

        hDialog=wx.MessageDialog(self, "°°°", "Exit", wx.OK|wx.CANCEL| wx.ICON_EXCLAMATION)
        rispostaDialog=hDialog.ShowModal()
        hDialog.Destroy()

        if rispostaDialog == wx.ID_OK:
            self.Destroy()


app = wx.App()
frame = CWindow(None, -1, "Example")
frame.Show()
frame.Center()
app.MainLoop()