python - wxpython：GridBagSizer 让我很困惑

Question

我是 python GUI 的新手，wxpython也是。现在我面临以下问题。

这里的代码是

import wx

class Example(wx.Frame):

    def __init__(self, parent, title):
        super(Example, self).__init__(parent, title=title)

        self.InitUI()
        self.Centre()
        self.Show()

    def InitUI(self):
        panel = wx.Panel(self)
        sizer = wx.GridBagSizer(0, 0)

        text = wx.StaticText(panel, label="Name:")
        sizer.Add(text, pos=(0, 0), flag=wx.ALL, border=5)

        tc = wx.TextCtrl(panel)
        sizer.Add(tc, pos=(0, 1), span=(1, 2), flag=wx.EXPAND | wx.ALL, border=5)

        text1 = wx.StaticText(panel, label="address")
        sizer.Add(text1, pos=(1, 0), flag=wx.ALL, border=5)

        tc1 = wx.TextCtrl(panel, style=wx.TE_MULTILINE)
        sizer.Add(tc1, pos=(1, 1), span=(1, 3), flag=wx.EXPAND | wx.ALL, border=5)

        text11 = wx.StaticText(panel, label="address2")
        sizer.Add(text11, pos=(1, 4), flag=wx.ALL, border=5)

        tc11 = wx.TextCtrl(panel, style=wx.TE_MULTILINE)
        sizer.Add(tc11, pos=(1, 5), span=(1, 3), flag=wx.EXPAND | wx.ALL, border=5)

        text2 = wx.StaticText(panel, label="age")
        sizer.Add(text2, pos=(2, 0), flag=wx.ALL, border=5)

        tc2 = wx.TextCtrl(panel)
        sizer.Add(tc2, pos=(2, 1), flag=wx.ALL, border=5)

        text3 = wx.StaticText(panel, label="Mob.No")
        sizer.Add(text3, pos=(2, 2), flag=wx.ALIGN_CENTER | wx.ALL, border=5)

        tc3 = wx.TextCtrl(panel)
        sizer.Add(tc3, pos=(2, 3), flag=wx.EXPAND | wx.ALL, border=5)

        text4 = wx.StaticText(panel, label="Description")
        sizer.Add(text4, pos=(3, 0), flag=wx.ALL, border=5)

        tc4 = wx.TextCtrl(panel, style=wx.TE_MULTILINE)
        sizer.Add(tc4, pos=(3, 1), span=(1, 3), flag=wx.EXPAND | wx.ALL, border=5)
        sizer.AddGrowableRow(3)

        buttonOk = wx.Button(panel, label="Ok")
        buttonClose = wx.Button(panel, label="Close")

        sizer.Add(buttonOk, pos=(4, 2), flag=wx.ALL, border=5)
        sizer.Add(buttonClose, pos=(4, 3), flag=wx.ALL, border=5)

        panel.SetSizerAndFit(sizer)


app = wx.App()
Example(None, title='GridBag Demo')
app.MainLoop()

这里的结果是

让我感到困惑的是标签address2。它显然不跨越三列。

text11 = wx.StaticText(panel, label="address2")
sizer.Add(text11, pos=(1, 4), flag=wx.ALL, border=5)

tc11 = wx.TextCtrl(panel, style=wx.TE_MULTILINE)
sizer.Add(tc11, pos=(1, 5), span=(1, 3), flag=wx.EXPAND | wx.ALL, border=5)

但是标签的代码与address2标签相同，address除了参数pos。有人可以解释一下。

环境：python3.7/wxpython4.0.4（最新）

标签： pythonwxpython

Answer 1

那 3 列的定义是什么？
您是否为第 5,6 和 7 列定义了任何内容以供sizer使用？
没有东西可以使用 sizer 不知道这些列有多大，所以你必须给它一些可以使用的东西或者定义一个空的单元格大小。

import wx

class Example(wx.Frame):

    def __init__(self, parent, title):
        super(Example, self).__init__(parent, title=title, size=(750,-1))

        self.InitUI()
        self.Centre()
        self.Show()

    def InitUI(self):
        panel = wx.Panel(self, -1)
        sizer = wx.GridBagSizer(0, 7)

        text = wx.StaticText(panel, label="Name:")
        sizer.Add(text, pos=(0, 0), flag=wx.ALL, border=5)
#
# place some dummy text to give the sizer something to work with
#
#        dummy4 = wx.StaticText(panel, label="something")
#        sizer.Add(dummy4, pos=(0, 4), flag=wx.ALL, border=5)
#        dummy5 = wx.StaticText(panel, label="something")
#        sizer.Add(dummy5, pos=(0, 5), flag=wx.ALL, border=5)
#        dummy6 = wx.StaticText(panel, label="something")
#        sizer.Add(dummy6, pos=(0, 6), flag=wx.ALL, border=5)
#        dummy7 = wx.StaticText(panel, label="something")
#        sizer.Add(dummy7, pos=(0, 7), flag=wx.ALL, border=5)
#
# or set a cell size for empty cells
#
        sizer.SetEmptyCellSize((130,20))

        tc = wx.TextCtrl(panel)
        sizer.Add(tc, pos=(0, 1), span=(1, 2), flag=wx.EXPAND | wx.ALL, border=5)

        text1 = wx.StaticText(panel, label="address")
        sizer.Add(text1, pos=(1, 0), flag=wx.ALL, border=5)

        tc1 = wx.TextCtrl(panel, style=wx.TE_MULTILINE)
        sizer.Add(tc1, pos=(1, 1), span=(1, 3), flag=wx.EXPAND | wx.ALL, border=5)

        text11 = wx.StaticText(panel, label="address2")
        sizer.Add(text11, pos=(1, 4), flag=wx.ALL, border=5)

        tc11 = wx.TextCtrl(panel, style=wx.TE_MULTILINE)
        sizer.Add(tc11, pos=(1, 5), span=(1, 3), flag=wx.EXPAND | wx.ALL, border=5)

        text2 = wx.StaticText(panel, label="age")
        sizer.Add(text2, pos=(2, 0), flag=wx.ALL, border=5)

        tc2 = wx.TextCtrl(panel)
        sizer.Add(tc2, pos=(2, 1), flag=wx.ALL, border=5)

        text3 = wx.StaticText(panel, label="Mob.No")
        sizer.Add(text3, pos=(2, 2), flag=wx.ALIGN_CENTER | wx.ALL, border=5)

        tc3 = wx.TextCtrl(panel)
        sizer.Add(tc3, pos=(2, 3), flag=wx.EXPAND | wx.ALL, border=5)

        text4 = wx.StaticText(panel, label="Description")
        sizer.Add(text4, pos=(3, 0), flag=wx.ALL, border=5)

        tc4 = wx.TextCtrl(panel, style=wx.TE_MULTILINE)
        sizer.Add(tc4, pos=(3, 1), span=(1, 3), flag=wx.EXPAND | wx.ALL, border=5)
        sizer.AddGrowableRow(3)

        buttonOk = wx.Button(panel, label="Ok")
        buttonClose = wx.Button(panel, label="Close")

        sizer.Add(buttonOk, pos=(4, 2), flag=wx.ALL, border=5)
        sizer.Add(buttonClose, pos=(4, 3), flag=wx.ALL, border=5)

        panel.SetSizerAndFit(sizer)

app = wx.App()
Example(None, title='GridBag Demo')
app.MainLoop()

ps 如果您只是将地址 2 放在地址 1 下方，布局可能会更好