边框：
* wx.SIMPLE_BORDER
* wx.RAISED_BORDER
* wx.SUNKEN_BORDER
* wx.DOUBLE_BORDER
* wx.STATIC_BORDER
* wx.NO_BORDER
wx.GridSizer 使用两维的表格来布局它里面的东西。每个表格的宽度等于它里面最大那个构件的宽度，高度等于它里面高度最大的那个构件的高度。
wx.GridSizer( integer rows, integer cols, integer vgap, integer hgap )
在构造器中，设定行和列的数目以及构件的水平和竖直间距。
使用 AddMany() 方法将构件插入到表中。按照从左到右、从上到下的顺序。
复制代码 代码示例:
#!/usr/bin/env python
# FileName: calculator.py
import wx
class MyFrame( wx.Frame ):
def __init__( self, parent, id, title ):
wx.Frame.__init__(self,parent,id,title,wx.DefaultPosition,wx.Size(300, 250))
self.formula = False
menubar = wx.MenuBar()
file = wx.Menu()
file.Append( 22, '&Quit', 'Exit Calculator' )
menubar.Append( file, '&File' )
self.SetMenuBar( menubar )
wx.EVT_MENU( self, 22, self.OnClose )
sizer = wx.BoxSizer( wx.VERTICAL )
self.display = wx.TextCtrl(self, -1, '', style=wx.TE_RIGHT)
sizer.Add(self.display, 0, wx.EXPAND|wx.TOP|wx.BOTTOM, 4)
gs = wx.GridSizer(4, 4, 3, 3)
gs.AddMany([(wx.Button(self, 20, 'Cls'), 0, wx.EXPAND),
(wx.Button(self, 21, 'Bck'), 0, wx.EXPAND),
(wx.StaticText(self, -1, ''), 0, wx.EXPAND),
(wx.Button(self, 22, 'Close'), 0, wx.EXPAND),
(wx.Button(self, 1, '7'), 0, wx.EXPAND),
(wx.Button(self, 2, '8'), 0, wx.EXPAND),
(wx.Button(self, 3, '9'), 0, wx.EXPAND),
(wx.Button(self, 4, '/'), 0, wx.EXPAND),
(wx.Button(self, 5, '4'), 0, wx.EXPAND),
(wx.Button(self, 6, '5'), 0, wx.EXPAND),
(wx.Button(self, 7, '6'), 0, wx.EXPAND),
(wx.Button(self, 8, '*'), 0, wx.EXPAND),
(wx.Button(self, 9, '1'), 0, wx.EXPAND),
(wx.Button(self, 10, '2'), 0, wx.EXPAND),
(wx.Button(self, 11, '3'), 0, wx.EXPAND),
(wx.Button(self, 12, '-'), 0, wx.EXPAND),
(wx.Button(self, 13, '0'), 0, wx.EXPAND),
(wx.Button(self, 14, '.'), 0, wx.EXPAND),
(wx.Button(self, 15, '='), 0, wx.EXPAND),
(wx.Button(self, 16, '+'), 0, wx.EXPAND)])
sizer.Add(gs, 1, wx.EXPAND)
self.SetSizer(sizer)
self.Centre()
wx.EVT_BUTTON(self, 20, self.OnClear)
wx.EVT_BUTTON(self, 21, self.OnBackspace)
wx.EVT_BUTTON(self, 22, self.OnClose)
wx.EVT_BUTTON(self, 1, self.OnSeven)
wx.EVT_BUTTON(self, 2, self.OnEight)
wx.EVT_BUTTON(self, 3, self.OnNine)
wx.EVT_BUTTON(self, 4, self.OnDivide)
wx.EVT_BUTTON(self, 5, self.OnFour)
wx.EVT_BUTTON(self, 6, self.OnFive)
wx.EVT_BUTTON(self, 7, self.OnSix)
wx.EVT_BUTTON(self, 8, self.OnMultiply)
wx.EVT_BUTTON(self, 9, self.OnOne)
wx.EVT_BUTTON(self, 10, self.OnTwo)
wx.EVT_BUTTON(self, 11, self.OnThree)
wx.EVT_BUTTON(self, 12, self.OnMinus)
wx.EVT_BUTTON(self, 13, self.OnZero)
wx.EVT_BUTTON(self, 14, self.OnDot)
wx.EVT_BUTTON(self, 15, self.OnEqual)
wx.EVT_BUTTON(self, 16, self.OnPlus)
def OnClear(self, event):
self.display.Clear()
def OnBackspace(self, event):
formula = self.display.GetValue()
self.display.Clear()
self.display.SetValue(formula[:-1])
def OnClose(self, event):
self.Close()
def OnDivide(self, event):
if self.formula:
return
self.display.AppendText('/')
def OnMultiply(self, event):
if self.formula:
return
self.display.AppendText('*')
def OnMinus(self, event):
if self.formula:
return
self.display.AppendText('-')
def OnPlus(self, event):
if self.formula:
return
self.display.AppendText('+')
def OnDot(self, event):
if self.formula:
return
self.display.AppendText('.')
def OnEqual(self, event):
if self.formula:
return
formula = self.display.GetValue()
self.formula = True
try:
self.display.Clear()
output = eval(formula)
self.display.AppendText(str(output))
except StandardError:
self.display.AppendText("Error")
def OnZero(self, event):
if self.formula:
self.display.Clear()
self.formula = False
self.display.AppendText('0')
def OnOne(self, event):
if self.formula:
self.display.Clear()
self.formula = False
self.display.AppendText('1')
def OnTwo(self, event):
if self.formula:
self.display.Clear()
self.formula = False
self.display.AppendText('2')
def OnThree(self, event):
if self.formula:
self.display.Clear()
self.formula = False
self.display.AppendText('3')
def OnFour(self, event):
if self.formula:
self.display.Clear()
self.formula = False
self.display.AppendText('4')
def OnFive(self, event):
if self.formula:
self.display.Clear()
self.formula = False
self.display.AppendText('5')
def OnSix(self, event):
if self.formula:
self.display.Clear()
self.formula = False
self.display.AppendText('6')
def OnSeven(self, event):
if self.formula:
self.display.Clear()
self.formula = False
self.display.AppendText('7')
def OnEight(self, event):
if self.formula:
self.display.Clear()
self.formula = False
self.display.AppendText('8')
def OnNine(self, event):
if self.formula:
self.display.Clear()
self.formula = False
self.display.AppendText('9')
class MyApp(wx.App):
def OnInit(self):
frame = MyFrame(None, -1, "calculator.py")
frame.Show(True)
self.SetTopWindow(frame)
return True
app = MyApp(0)
app.MainLoop()
输入的公式使用 python 的内置函数 eval 来处理。
output = eval( formula )
如果公式有错，就会显示一条错误信息。
请注意如何在 Bck 和 Close 按纽之间插入空白的。
只是简单的在那放了一个空的 wx.StaticText。这是一个很常用的技巧。
