wxPython - GridBagSizer

GridBagSizer 是一种多功能的布局管理器。它提供了比 FlexiGridSizer 更多的增强功能。子部件可以添加到网格中的特定单元格。此外，子部件可以在水平和/或垂直方向上占据多个单元格。因此，同一行中的静态文本和多行文本控件可以具有不同的宽度和高度。

网格包布局应通过确定位置、跨度和间隙来精心规划。wx.GridBagSizer 类只有一个构造函数，它接受两个参数。

Wx.GridBagSizer(vgap,hgap)

GridBagsizer 类最重要的方法是 Add()，它将位置作为必填参数。跨度、对齐方式、边框标志和边框大小参数是可选的。如果未显式使用，则它们将采用默认值。

Wx.GridbagSizer().Add(control, pos, span, flags, border)

下表列出了 GridBagSizer 类的各种方法：

以下代码显示了一个表单，其中包含与文本框 (TexCtrl) 关联的标签 (StaticText)。TextCtrl 对象添加时指定了跨度参数。因此，文本框的宽度跨越了多列。姓名文本框跨越了两列。

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

地址文本框是一个多行文本控件，跨越了三列。

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

包含描述的多行文本控件的行设置为可扩展，以便如果表单被拉伸，它会在垂直方向向下扩展。

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)

以下是完整代码：

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) 
         
      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()

以上代码产生以下输出：