python - WxPython - 在代码中设置其值时触发复选框事件

Question

考虑以下代码:

import wx

class MyFrame(wx.Frame):
    def __init__(self, *args, **kwds):
        wx.Frame.__init__(self, *args, **kwds)
        self.cb1 = wx.CheckBox(self, -1, "CheckBox 1")
        self.cb2 = wx.CheckBox(self, -1, "CheckBox 2")
        self.cb3 = wx.CheckBox(self, -1, "CheckBox 3")

        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.cb1, 0, wx.ADJUST_MINSIZE, 0)
        sizer.Add(self.cb2, 0, wx.ADJUST_MINSIZE, 0)
        sizer.Add(self.cb3, 0, wx.ADJUST_MINSIZE, 0)

        self.SetSizer(sizer)
        self.Layout()

        self.Bind(wx.EVT_CHECKBOX, self.OnCb1, self.cb1)
        self.Bind(wx.EVT_CHECKBOX, self.OnCb2, self.cb2)

    def OnCb1(self, evt):
        self.cb2.SetValue(evt.IsChecked())

    def OnCb2(self, evt):
        self.cb3.SetValue(evt.IsChecked())


if __name__ == "__main__":
    app = wx.PySimpleApp(0)
    frame = MyFrame(None, -1, "")
    app.SetTopWindow(frame)
    frame.Show()
    app.MainLoop()

这里我有 3 个复选框绑定(bind)在一起，所以 cb2在 cb1 时被检查确实和cb3在 cb2 时被检查做。但是，当我设置 cb2 的值时在 OnCb1常规，cb2未触发复选框事件，cb3复选框保持未选中状态。所以我想找到一种以某种方式触发的方法cb2仅选中 cb1 时手动事件一次选中所有 3 个框.如果有人给我提示，我将不胜感激。

Answer 1

像这样使用 wx.PostEvent...

class launcherWindow(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, parent=None, title='New Window')
        #now add the main body, start with a panel
        panel = wx.Panel(self)
        #instantiate a new dropdown
        self.productDropDown = wx.ComboBox(panel, size=wx.DefaultSize, style = wx.CB_READONLY)

        #get the products and product subtypes
        self.productDict = self.getProductsAndSubtypes()

        #setup subtypes first, just in case, since onProductSelection will reference this
        self.productSubtypeDropDown = wx.ComboBox(panel, size=wx.DefaultSize, style = wx.CB_READONLY)

        #add products
        for product in self.productDict.keys():
            self.productDropDown.Append(product)

        #bind selection event
        self.productDropDown.Bind(wx.EVT_COMBOBOX, self.onProductSelection)

        #set default selection
        self.productDropDown.SetSelection(0)

        #pretend that we clicked the product selection, so it's event gets called
        wx.PostEvent(self.productDropDown, wx.CommandEvent(wx.wxEVT_COMMAND_COMBOBOX_SELECTED))

        #now add the dropdown to a sizer, set the sizer for the panel, fit the panel, etc...

    def onProductSelection(self, event):
        productSelected = self.productDropDown.GetStringSelection()
        productSubtypes = self.productDict[productSelected]

        #clear any existing product subtypes, since each product may have different ones
        self.productSubtypeDropDown.Clear()

        for productSubtype in productSubtypes:
            self.productSubtypeDropDown.Append(productSubtype)

        #select the first item by default
        self.productSubtypeDropDown.SetSelection(0)