wxPython -- event 範例

這一個範例，是延續之前的範例,但是之前你按下功能表上的選項,並不會有反應！現在就是要讓它有作用！

import os
import wx
ID_ABOUT=101
ID_EXIT=110
class MainWindow(wx.Frame):
    def __init__(self,parent,id,title):
        wx.Frame.__init__(self,parent,wx.ID_ANY, title, size = (200,100))
        self.control = wx.TextCtrl(self, 1, style=wx.TE_MULTILINE)
        self.CreateStatusBar() # A StatusBar in the bottom of the window
        # Setting up the menu.
        filemenu= wx.Menu()
        filemenu.Append(ID_ABOUT, "&About"," Information about this program")
        filemenu.AppendSeparator()
        filemenu.Append(ID_EXIT,"E&xit"," Terminate the program")
        # Creating the menubar.
        menuBar = wx.MenuBar()
        menuBar.Append(filemenu,"&File") # Adding the "filemenu" to the MenuBar
        self.SetMenuBar(menuBar)  # Adding the MenuBar to the Frame content.
        wx.EVT_MENU(self, ID_ABOUT, self.OnAbout) # attach the menu-event ID_ABOUT to the
                                                           # method self.OnAbout
        wx.EVT_MENU(self, ID_EXIT, self.OnExit)   # attach the menu-event ID_EXIT to the
                                                           # method self.OnExit
        self.Show(True)
    def OnAbout(self,e):
        d= wx.MessageDialog( self, " A sample editor \n"
                            " in wxPython","About Sample Editor", wx.OK)
                            # Create a message dialog box
        d.ShowModal() # Shows it
        d.Destroy() # finally destroy it when finished.
    def OnExit(self,e):
        self.Close(True)  # Close the frame.
app = wx.PySimpleApp()
frame = MainWindow(None, -1, "Sample editor")
app.MainLoop()

這裡大致上都跟前面沒什麼差別！主要的重點在於這幾行：
wx.EVT_MENU(self, ID_ABOUT, self.OnAbout) # attach the menu-event ID_ABOUT to the
# method self.OnAbout
wx.EVT_MENU(self, ID_EXIT, self.OnExit) # attach the menu-event ID_EXIT to the
# method self.OnExit
而在後面還要去定義OnAbout與OnExit的內容，才能讓滑鼠的動作能對應上我們希望的功能。而在OnAbout裡面我們可以找到如何產生一個Message Dialog Box的語法。
d= wx.MessageDialog( self, " A sample editor \n"
" in wxPython","About Sample Editor", wx.OK)
這樣就會讓我們按下about後，跳出一個對話盒。