带有 CheckListBox 弹出窗口的 ComboCtrl - EVT_CHECKLISTBOX 不起作用答案

【问题标题】：ComboCtrl with a CheckListBox popup - EVT_CHECKLISTBOX doesn't work带有 CheckListBox 弹出窗口的 ComboCtrl - EVT_CHECKLISTBOX 不起作用
【发布时间】：2019-03-09 21:36:07
【问题描述】：

在上一篇文章之后，我发现我可以将 ComboCtrl 与 Checklistbox Popup 结合使用。到现在为止还挺好。现在我试图弄清楚为什么 EVT_CHECKLISTBOX 不能正常工作。我是不是绑定错了？

self.lc.Bind(wx.EVT_CHECKLISTBOX, self.OnSelect)

还有：

如何使弹出窗口适合内容？目前它非常庞大
如何更改不再填满整个窗口的组合框？

到目前为止，这是我的代码：

import wx
import wx.stc
from wx.lib.mixins.listctrl import CheckListCtrlMixin, ListCtrlAutoWidthMixin

class CheckListCtrl(wx.ListCtrl, CheckListCtrlMixin, ListCtrlAutoWidthMixin):
    def __init__(self, parent):
        wx.ListCtrl.__init__(self, parent, wx.ID_ANY, style=wx.LC_REPORT |
                wx.SUNKEN_BORDER)
        CheckListCtrlMixin.__init__(self)
        ListCtrlAutoWidthMixin.__init__(self)  

class ListViewComboPopup(wx.ComboPopup):
    def __init__(self):
        wx.ComboPopup.__init__(self)
        self.lc = None

    def AddItem(self, txt):
        self.lc.InsertItem(0, txt)

    def OnSelect(self, event):
        print("Working fine!")

    def Init(self):
        self.value = -1
        self.curitem = -1

    def Create(self, parent):
        self.lc = CheckListCtrl(parent)
        self.lc.InsertColumn(0, '', width=90)

        self.lc.Bind(wx.EVT_CHECKLISTBOX, self.OnSelect)
        return True

    def GetControl(self):
        return self.lc

    def OnPopup(self):
        wx.ComboPopup.OnPopup(self)

class MyForm(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, title="Popup Menu Tutorial")

        comboCtrl = wx.ComboCtrl(self, wx.ID_ANY, "")        
        popupCtrl = ListViewComboPopup()
        comboCtrl.SetPopupControl(popupCtrl)

        popupCtrl.AddItem("Test 1")
        popupCtrl.AddItem("Test 2")
        popupCtrl.AddItem("Test 3") 

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

【问题讨论】：

标签： python user-interface combobox wxpython

【解决方案1】：

OnCheckItem 由 CheckListCtrlMixin 调用。
将面板添加到框架并将 ComboCtrl 的父级设置为面板
改变 ComboPopup 的方法 GetAdjustedSize 返回值来改变大小

import wx
import wx.stc
from wx.lib.mixins.listctrl import CheckListCtrlMixin, ListCtrlAutoWidthMixin


class CheckListCtrl(wx.ListCtrl, CheckListCtrlMixin, ListCtrlAutoWidthMixin):

    def __init__(self, parent):
        wx.ListCtrl.__init__(self, parent, wx.ID_ANY, style=wx.LC_REPORT | 
                wx.SUNKEN_BORDER)
        CheckListCtrlMixin.__init__(self)
        ListCtrlAutoWidthMixin.__init__(self)
        self.SetSize(-1, -1, -1, 50)

    def OnCheckItem(self, index, flag):
        item = self.GetItem(index)
        if flag:
            what = "checked"
        else:
            what = "unchecked"

        print(f'{item.GetText()} - {what}')


class ListViewComboPopup(wx.ComboPopup):

    def __init__(self):
        wx.ComboPopup.__init__(self)
        self.lc = None

    def AddItem(self, txt):
        self.lc.InsertItem(0, txt)


    def Init(self):
        self.value = -1
        self.curitem = -1

    def Create(self, parent):
        self.lc = CheckListCtrl(parent)
        self.lc.InsertColumn(0, '', width=90)
        return True

    def GetControl(self):
        return self.lc

    def OnPopup(self):
        wx.ComboPopup.OnPopup(self)

    def GetAdjustedSize(self, minWidth, prefHeight, maxHeight):
        return wx.ComboPopup.GetAdjustedSize(
            self, minWidth, 110, maxHeight)


class MyForm(wx.Frame):

    def __init__(self):
        wx.Frame.__init__(self, None, title="Popup Menu Tutorial")
        panel = wx.Panel(self)

        comboCtrl = wx.ComboCtrl(panel, wx.ID_ANY, "Select filter")    
        popupCtrl = ListViewComboPopup()
        comboCtrl.SetPopupControl(popupCtrl)

        popupCtrl.AddItem("Test 1")
        popupCtrl.AddItem("Test 2")
        popupCtrl.AddItem("Test 3") 


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

【讨论】：