wxpython动态改变Choice的内容

Question

问题是UI中有两个Choice下拉框，第二个框的内容最初是空的，当用户在第一个框中选择一个选项时，对应的选项出现在第二个盒子。 例如，如果第一个框是月份，第二个框是天，并且用户选择一月，那么第二个框有 1...。 31、用户选择二月，第二帧为1... 28。 我的代码如下。 `

import wx

class myFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__ ( self, None, id = wx.ID_ANY, title = wx.EmptyString, pos = wx.DefaultPosition, size = wx.Size( 500,300 ), style = wx.DEFAULT_FRAME_STYLE|wx.TAB_TRAVERSAL )

        self.SetSizeHints( wx.DefaultSize, wx.DefaultSize )

        bSizer9 = wx.BoxSizer( wx.VERTICAL )

        self.m_staticText14 = wx.StaticText( self, wx.ID_ANY, u"select Month", wx.DefaultPosition, wx.DefaultSize, 0 )
        self.m_staticText14.Wrap( -1 )

        bSizer9.Add( self.m_staticText14, 0, wx.ALL|wx.ALIGN_CENTER_HORIZONTAL, 5 )

        # select month
        m_choice1Choices = ["Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"]
        self.m_choice1 = wx.Choice( self, wx.ID_ANY, wx.DefaultPosition, wx.DefaultSize, m_choice1Choices, 0 )
        self.m_choice1.SetSelection( 0 )
        bSizer9.Add( self.m_choice1, 0, wx.ALL|wx.ALIGN_CENTER_HORIZONTAL, 5 )

        self.m_staticText15 = wx.StaticText( self, wx.ID_ANY, u"select Day", wx.DefaultPosition, wx.DefaultSize, 0 )
        self.m_staticText15.Wrap( -1 )

        bSizer9.Add( self.m_staticText15, 0, wx.ALL|wx.ALIGN_CENTER_HORIZONTAL, 5 )
        
        # select day
        m_choice2Choices = [str(i) for i in range(1,31)]
        self.m_choice2 = wx.Choice( self, wx.ID_ANY, wx.DefaultPosition, wx.DefaultSize, m_choice2Choices, 0 )
        self.m_choice2.SetSelection( 0 )
        bSizer9.Add( self.m_choice2, 0, wx.ALL|wx.ALIGN_CENTER_HORIZONTAL, 5 )


        self.SetSizer( bSizer9 )
        self.Layout()

        self.Centre( wx.BOTH )

app = wx.App()
myFrame().Show()
app.MainLoop()

`

Answer 1

问题实际上并不在于wx.Choice，而是我如何为不同月份提供不同的日期选项。

Choice 问题只需通过更改其列表中的项目来解决，这可以通过将 Bind 更改为月份选项来完成。
简而言之，如果更改月份，请根据月份更改日期列表。 （小曲“30天有九月、四月、六月和十一月。其余的都是31天，只有二月除外”）

下面，有些未经测试，但你明白了，我 Bind 将月份选择设置为回调，它会重置所选月份的天数列表。
作为旁注，检查您的range 命令，stop 值是它停止的位置，所以range(1,31) 会给您 1...30

import wx
import datetime
from calendar import monthrange

year = datetime.datetime.now().year
month_days = []
for i in range(1,13):
    month_days.append(monthrange(year,i)[1])

class myFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__ ( self, None, id = wx.ID_ANY, title = wx.EmptyString, pos = wx.DefaultPosition, size = wx.Size( 500,300 ), style = wx.DEFAULT_FRAME_STYLE|wx.TAB_TRAVERSAL )

        self.SetSizeHints( wx.DefaultSize, wx.DefaultSize )

        bSizer9 = wx.BoxSizer( wx.VERTICAL )

        self.m_staticText14 = wx.StaticText( self, wx.ID_ANY, u"select Month", wx.DefaultPosition, wx.DefaultSize, 0 )
        self.m_staticText14.Wrap( -1 )

        bSizer9.Add( self.m_staticText14, 0, wx.ALL|wx.ALIGN_CENTER_HORIZONTAL, 5 )

        # select month
        m_choice1Choices = ["Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"]
        self.m_choice1 = wx.Choice( self, wx.ID_ANY, wx.DefaultPosition, wx.DefaultSize, m_choice1Choices, 0 )
        self.m_choice1.SetSelection( 0 )
        bSizer9.Add( self.m_choice1, 0, wx.ALL|wx.ALIGN_CENTER_HORIZONTAL, 5 )

        self.m_staticText15 = wx.StaticText( self, wx.ID_ANY, u"select Day", wx.DefaultPosition, wx.DefaultSize, 0 )
        self.m_staticText15.Wrap( -1 )

        bSizer9.Add( self.m_staticText15, 0, wx.ALL|wx.ALIGN_CENTER_HORIZONTAL, 5 )
        
        # select day
        #m_choice2Choices = [str(i) for i in range(1,31)]
        mth_idx = self.m_choice1.GetSelection()
        self.m_choice2Choices = [str(i) for i in range(1,month_days[mth_idx]+1)]

        self.m_choice2 = wx.Choice( self, wx.ID_ANY, wx.DefaultPosition, wx.DefaultSize, self.m_choice2Choices, 0 )
        self.m_choice2.SetSelection( 0 )
        bSizer9.Add( self.m_choice2, 0, wx.ALL|wx.ALIGN_CENTER_HORIZONTAL, 5 )

        self.m_choice1.Bind(wx.EVT_CHOICE, self.DaysInMonth)

        self.SetSizer( bSizer9 )
        self.Layout()

        self.Centre( wx.BOTH )

    def DaysInMonth(self, event):
        mth_idx = self.m_choice1.GetSelection()
        self.m_choice2Choices = [str(i) for i in range(1,month_days[mth_idx]+1)]        
        self.m_choice2.SetItems(self.m_choice2Choices)

app = wx.App()
myFrame().Show()
app.MainLoop()