pthon wxPython GUI

#_*_ coding:utf8 _*_
import wx

def load(event):
file = open(filename.GetValue())
contents.SetValue(file.read())
file.close()
def save(event):
file = open(filename.GetValue(),'w')
file.write(contents.GetValue())
file.close()

app = wx.App()#PySimple
win = wx.Frame(None,title="Simple Editor",size=(410,335))
bkg = wx.Panel(win)

loadButton = wx.Button(bkg, label='Open')
loadButton.Bind(wx.EVT_BUTTON,load)
saveButton = wx.Button(bkg,label="Save")
saveButton.Bind(wx.EVT_BUTTON,save)
filename=wx.TextCtrl(bkg)  ##定义一个文本对象
contents=wx.TextCtrl(bkg,style=wx.TE_MULTILINE|wx.HSCROLL)  ##创建一个多行的，有水平滚动条的文本框

hbox= wx.BoxSizer() ##使用尺寸器，实现相对坐标
hbox.Add(filename,proportion=1,flag=wx.EXPAND) ##在窗口扩大时(水平方向），filename能获得所有额外的空间
hbox.Add(loadButton,proportion=0,flag=wx.LEFT,border=5)
hbox.Add(saveButton,proportion=0,flag=wx.LEFT,border=5)

vbox = wx.BoxSizer(wx.VERTICAL)
vbox.Add(hbox,proportion=0,flag=wx.EXPAND | wx.ALL,border=5)
vbox.Add(contents,proportion=1,flag=wx.EXPAND | wx.LEFT | wx.BOTTOM | wx.RIGHT,border=5)

bkg.SetSizer(vbox)
win.Show()
app.MainLoop()