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Commit	Line	Data
	1	#!/usr/bin/env python
	2
	3	"""
	4	This demo attempts to override the C++ MainLoop and implement it
	5	in Python.
	6	"""
	7
	8	import time
	9	import wx
	10
	11	#---------------------------------------------------------------------------
	12
	13	class MyFrame(wx.Frame):
	14
	15	def __init__(self, parent, id, title):
	16	wx.Frame.__init__(self, parent, id, title,
	17	(100, 100), (160, 150))
	18
	19	self.Bind(wx.EVT_SIZE, self.OnSize)
	20	self.Bind(wx.EVT_MOVE, self.OnMove)
	21	self.Bind(wx.EVT_CLOSE, self.OnCloseWindow)
	22	self.Bind(wx.EVT_IDLE, self.OnIdle)
	23
	24	self.count = 0
	25
	26	panel = wx.Panel(self)
	27	sizer = wx.FlexGridSizer(cols=2, hgap=5, vgap=5)
	28
	29	self.sizeCtrl = wx.TextCtrl(panel, -1, "", style=wx.TE_READONLY)
	30	sizer.Add(wx.StaticText(panel, -1, "Size:"))
	31	sizer.Add(self.sizeCtrl)
	32
	33	self.posCtrl = wx.TextCtrl(panel, -1, "", style=wx.TE_READONLY)
	34	sizer.Add(wx.StaticText(panel, -1, "Pos:"))
	35	sizer.Add(self.posCtrl)
	36
	37	self.idleCtrl = wx.TextCtrl(panel, -1, "", style=wx.TE_READONLY)
	38	sizer.Add(wx.StaticText(panel, -1, "Idle:"))
	39	sizer.Add(self.idleCtrl)
	40
	41	border = wx.BoxSizer()
	42	border.Add(sizer, 0, wx.ALL, 20)
	43	panel.SetSizer(border)
	44
	45
	46	def OnCloseWindow(self, event):
	47	app.keepGoing = False
	48	self.Destroy()
	49
	50	def OnIdle(self, event):
	51	self.idleCtrl.SetValue(str(self.count))
	52	self.count = self.count + 1
	53
	54	def OnSize(self, event):
	55	size = event.GetSize()
	56	self.sizeCtrl.SetValue("%s, %s" % (size.width, size.height))
	57	event.Skip()
	58
	59	def OnMove(self, event):
	60	pos = event.GetPosition()
	61	self.posCtrl.SetValue("%s, %s" % (pos.x, pos.y))
	62
	63
	64
	65	#---------------------------------------------------------------------------
	66
	67	class MyApp(wx.App):
	68	def MainLoop(self):
	69
	70	if "wxMac" in wx.PlatformInfo:
	71	# TODO: Does wxMac implement wxEventLoop yet???
	72	wx.App.MainLoop()
	73
	74	else:
	75	# Create an event loop and make it active. If you are
	76	# only going to temporarily have a nested event loop then
	77	# you should get a reference to the old one and set it as
	78	# the active event loop when you are done with this one...
	79	evtloop = wx.EventLoop()
	80	old = wx.EventLoop.GetActive()
	81	wx.EventLoop.SetActive(evtloop)
	82
	83	# This outer loop determines when to exit the application,
	84	# for this example we let the main frame reset this flag
	85	# when it closes.
	86	while self.keepGoing:
	87	# At this point in the outer loop you could do
	88	# whatever you implemented your own MainLoop for. It
	89	# should be quick and non-blocking, otherwise your GUI
	90	# will freeze.
	91
	92	# call_your_code_here()
	93
	94
	95	# This inner loop will process any GUI events
	96	# until there are no more waiting.
	97	while evtloop.Pending():
	98	evtloop.Dispatch()
	99
	100	# Send idle events to idle handlers. You may want to
	101	# throttle this back a bit somehow so there is not too
	102	# much CPU time spent in the idle handlers. For this
	103	# example, I'll just snooze a little...
	104	time.sleep(0.10)
	105	self.ProcessIdle()
	106
	107	wx.EventLoop.SetActive(old)
	108
	109
	110
	111	def OnInit(self):
	112	frame = MyFrame(None, -1, "This is a test")
	113	frame.Show(True)
	114	self.SetTopWindow(frame)
	115
	116	self.keepGoing = True
	117	return True
	118
	119
	120	app = MyApp(False)
	121	app.MainLoop()
	122
	123
	124
	125
	126