* Allow ExitMainLoop to be overridden.

* Add wxGUIEventLoop.
* Add a mainloop sample.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxPython/Phoenix/trunk@71838 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/mainloop/mainloop.py

@@ -0,0 +1,169 @@
+#!/usr/bin/env python
+
+"""
+This demo attempts to override the C++ MainLoop and implement it
+in Python.
+"""
+
+import time
+import wx                  
+
+##import os; raw_input('PID: %d\nPress enter...' % os.getpid())
+
+#---------------------------------------------------------------------------
+
+class MyFrame(wx.Frame):
+
+    def __init__(self, parent, id, title):
+        wx.Frame.__init__(self, parent, id, title,
+                         (100, 100), (160, 150))
+
+        self.Bind(wx.EVT_SIZE, self.OnSize)
+        self.Bind(wx.EVT_MOVE, self.OnMove)
+        self.Bind(wx.EVT_CLOSE, self.OnCloseWindow)
+        self.Bind(wx.EVT_IDLE, self.OnIdle)
+
+        self.count = 0
+
+        panel = wx.Panel(self)
+        sizer = wx.FlexGridSizer(cols=2, hgap=5, vgap=5)
+        
+        self.sizeCtrl = wx.TextCtrl(panel, -1, "", style=wx.TE_READONLY)
+        sizer.Add(wx.StaticText(panel, -1, "Size:"))
+        sizer.Add(self.sizeCtrl)
+
+        self.posCtrl = wx.TextCtrl(panel, -1, "", style=wx.TE_READONLY)
+        sizer.Add(wx.StaticText(panel, -1, "Pos:"))
+        sizer.Add(self.posCtrl)
+
+        self.idleCtrl = wx.TextCtrl(panel, -1, "", style=wx.TE_READONLY)
+        sizer.Add(wx.StaticText(panel, -1, "Idle:"))
+        sizer.Add(self.idleCtrl)
+
+        border = wx.BoxSizer()
+        border.Add(sizer, 0, wx.ALL, 20)
+        panel.SetSizer(border)
+        
+
+    def OnCloseWindow(self, event):
+        print wx.GetApp().GetExitOnFrameDelete()
+        self.Destroy()
+
+    def OnIdle(self, event):
+        self.idleCtrl.SetValue(str(self.count))
+        self.count = self.count + 1
+
+    def OnSize(self, event):
+        size = event.GetSize()
+        self.sizeCtrl.SetValue("%s, %s" % (size.width, size.height))
+        event.Skip()
+
+    def OnMove(self, event):
+        pos = event.GetPosition()
+        self.posCtrl.SetValue("%s, %s" % (pos.x, pos.y))
+
+
+
+#---------------------------------------------------------------------------
+
+class MyEventLoop(wx.GUIEventLoop):
+    def __init__(self):
+        wx.GUIEventLoop.__init__(self)
+        self.exitCode = 0
+        self.shouldExit = False
+
+        
+    def DoMyStuff(self):
+        # Do whatever you want to have done for each iteration of the event
+        # loop. In this example we'll just sleep a bit to simulate something
+        # real happening.
+        time.sleep(0.10)
+
+        
+    def Run(self):
+        # Set this loop as the active one. It will automatically reset to the
+        # original evtloop when the context manager exits.
+        with wx.EventLoopActivator(self):
+            while True:
+                
+                self.DoMyStuff()
+            
+                # Generate and process idles events for as long as there
+                # isn't anything else to do
+                while not self.shouldExit and not self.Pending() and self.ProcessIdle():
+                    pass
+
+                if self.shouldExit:
+                    break
+                
+                # dispatch all the pending events and call Dispatch() to wait
+                # for the next message
+                if not self.ProcessEvents():
+                    break
+
+                # Currently on wxOSX Pending always returns true, so the
+                # ProcessIdle above is not ever called. Call it here instead.
+                if 'wxOSX' in wx.PlatformInfo:
+                    self.ProcessIdle()           
+            
+            # Proces remaining queued messages, if any
+            while True:
+                checkAgain = False
+                if wx.GetApp() and wx.GetApp().HasPendingEvents():
+                    wx.GetApp().ProcessPendingEvents()
+                    checkAgain = True
+                if 'wxOSX' not in wx.PlatformInfo and self.Pending():
+                    self.Dispatch()
+                    checkAgain = True
+                if not checkAgain:
+                    break
+                
+        return self.exitCode
+
+    
+    def Exit(self, rc=0):
+        self.exitCode = rc
+        self.shouldExit = True
+        self.OnExit()
+        self.WakeUp()
+        
+        
+    def ProcessEvents(self):
+        if wx.GetApp():
+            wx.GetApp().ProcessPendingEvents()        
+            
+        if self.shouldExit:
+            return False
+        
+        return self.Dispatch()
+
+
+        
+        
+
+class MyApp(wx.App):
+
+    def MainLoop(self):
+        self.SetExitOnFrameDelete(True)
+        self.mainLoop = MyEventLoop()
+        self.mainLoop.Run()
+
+    def ExitMainLoop(self):
+        self.mainLoop.Exit()
+
+    def OnInit(self):
+        frame = MyFrame(None, -1, "This is a test")
+        frame.Show(True)
+        self.SetTopWindow(frame)
+
+        #self.keepGoing = True
+        return True
+
+
+app = MyApp(False)
+app.MainLoop()
+
+
+
+
+