Escape button to close WxPython GUI

Question

I am working on a fairly simple wxpython GUI and want the activation key to close the window. Right now I have a close button that executes sys.exit (0), but I would like the escape key to do this.

Does anyone know how to do this?

import win32clipboard import wx from time import sleep import sys class MainFrame(wx.Frame): def __init__(self,title): wx.Frame.__init__(self, None, title="-RRESI Rounder-", pos=(0,0), size=(210,160)) panel=Panel(self) icon = wx.Icon('ruler_ico.ico', wx.BITMAP_TYPE_ICO) self.SetIcon(icon) class Panel(wx.Panel): def __init__(self, parent): wx.Panel.__init__(self, parent) x1=10; x2=110 y1=40; dy=25; ddy=-3 boxlength=80 self.button =wx.Button(self, label="GO", pos=(100,y1+dy*3)) self.Bind(wx.EVT_BUTTON, self.OnClick,self.button) self.button.SetDefault() self.button2 =wx.Button(self, label="Close", pos=(100,y1+dy*4)) self.Bind(wx.EVT_BUTTON, self.OnClose, self.button2) self.button.SetDefault() self.Bind(wx.EVT_KEY_UP, self.OnKeyUP) self.label1 = wx.StaticText(self, label="Input Number:", pos=(x1,y1+dy*1)) self.Input = wx.TextCtrl(self, value="1.001", pos=(x2,ddy+y1+dy*1), size=(boxlength,-1)) self.label0 = wx.StaticText(self, label="Round to closest: 1/", pos=(x1,y1+dy*0)) self.Denominator = wx.TextCtrl(self, value="64", pos=(x2,ddy+y1+dy*0), size=(boxlength,-1)) self.label2 = wx.StaticText(self, label="Output Number:", pos=(x1,y1+dy*2)) self.display = wx.TextCtrl(self, value="1.0", pos=(x2,ddy+y1+dy*2), size=(boxlength,-1)) self.display.SetBackgroundColour(wx.Colour(232, 232, 232)) self.label3 = wx.StaticText(self, label=" ", pos=(x2+7,y1+dy*2+20)) #Copied self.label4 = wx.StaticText(self, label="Type value and hit Enter", pos=(x1-5,y1-dy*1.5)) self.label5 = wx.StaticText(self, label="Output is copied", pos=(x1-5,y1-dy*1)) font = wx.Font(8, wx.DEFAULT, wx.NORMAL, wx.NORMAL) self.label4.SetFont(font) self.label5.SetFont(font) def OnKeyUP(self, event): keyCode = event.GetKeyCode() if keyCode == wx.WXK_ESCAPE: sys.exit(0) def OnClose(self, event): print "Closed" sys.exit(0) def OnClick(self,event): print "You clicked the button!" def openClipboard(): try: win32clipboard.OpenClipboard() except Exception, e: print e pass def closeClipboard(): try: win32clipboard.CloseClipboard() except Exception, e: print e pass def clearClipboard(): try: openClipboard() win32clipboard.EmptyClipboard() closeClipboard() except TypeError: pass def setText(txt): openClipboard() win32clipboard.EmptyClipboard() win32clipboard.SetClipboardText(txt) closeClipboard() Denominator = float(self.Denominator.GetValue()) Input=float(self.Input.GetValue()) Output=round(Input*Denominator,0)/Denominator self.display.SetValue(str(Output)) setText(str(Output)) self.label3.SetLabel("Copied") self.Update()#force redraw sleep(.5) wx.Timer self.label3.SetLabel(" ") if __name__=="__main__": app = wx.App(redirect=False) # Error messages don't go to popup window frame = MainFrame("RRESI Rounder") frame.Show() app.MainLoop() 

Answer 1

This sorting works ... albiet with some problems

[edit] ok EVT_CHAR_HOOK works much better than EVT_KEY_UP

 import wx class Test(wx.Frame): def __init__(self): wx.Frame.__init__(self, None, -1, title='Event Test', size=(200, 200)) panel = wx.Panel(self) panel.SetFocus() self.Bind(wx.EVT_CHAR_HOOK, self.OnKeyUP) def OnKeyUP(self, event): print "KEY UP!" keyCode = event.GetKeyCode() if keyCode == wx.WXK_ESCAPE: self.Close() event.Skip() class App(wx.App): """Application class.""" def OnInit(self): self.frame = Test() self.frame.Show() self.SetTopWindow(self.frame) self.frame.SetFocus() return True if __name__ == '__main__': app = App() app.MainLoop() 

Answer 2

Probably an easier way is to set the frame as a dialog with a cancel button (which you can hide):

 class MainFrame(wx.Dialog): ... def __init__(self, ...): ... # the frame must have a cancel button cancel_button = wx.Button(..., id=wx.ID_CANCEL) # it still works if you hide it cancel_button.Hide() 

This seems to provide the default processing for the evacuation key. You can even bind it to an event handler to perform some actions before closing - if you use a handler, you must use event.Skip (True) to propagate the event or .Skip (False) event to stop the undo operation.