utils/wxPython/demo/demoMainLoop.py

   1 """
   2 This demo attempts to override the C++ MainLoop and implement it
   3 in Python.  This is not part of the demo framework.
   4
   5
   6                 THIS FEATURE IS STILL EXPERIMENTAL...
   7 """
   8
   9
  10 from wxPython.wx import *
  11 import time
  12
  13
  14 #---------------------------------------------------------------------------
  15
  16 class MyFrame(wxFrame):
  17
  18     def __init__(self, parent, id, title):
  19         wxFrame.__init__(self, parent, id, title,
  20                          wxPoint(100, 100), wxSize(160, 150))
  21
  22         EVT_SIZE(self, self.OnSize)
  23         EVT_MOVE(self, self.OnMove)
  24         EVT_CLOSE(self, self.OnCloseWindow)
  25         EVT_IDLE(self, self.OnIdle)
  26
  27         self.count = 0
  28
  29         panel = wxPanel(self, -1)
  30         wxStaticText(panel, -1, "Size:",
  31                      wxDLG_PNT(panel, wxPoint(4, 4)),  wxDefaultSize)
  32         wxStaticText(panel, -1, "Pos:",
  33                      wxDLG_PNT(panel, wxPoint(4, 16)), wxDefaultSize)
  34
  35         wxStaticText(panel, -1, "Idle:",
  36                      wxDLG_PNT(panel, wxPoint(4, 28)), wxDefaultSize)
  37
  38         self.sizeCtrl = wxTextCtrl(panel, -1, "",
  39                                    wxDLG_PNT(panel, wxPoint(24, 4)),
  40                                    wxDLG_SZE(panel, wxSize(36, -1)),
  41                                    wxTE_READONLY)
  42
  43         self.posCtrl = wxTextCtrl(panel, -1, "",
  44                                   wxDLG_PNT(panel, wxPoint(24, 16)),
  45                                   wxDLG_SZE(panel, wxSize(36, -1)),
  46                                   wxTE_READONLY)
  47
  48         self.idleCtrl = wxTextCtrl(panel, -1, "",
  49                                    wxDLG_PNT(panel, wxPoint(24, 28)),
  50                                    wxDLG_SZE(panel, wxSize(36, -1)),
  51                                    wxTE_READONLY)
  52
  53
  54     def OnCloseWindow(self, event):
  55         app.keepGoing = false
  56         self.Destroy()
  57
  58     def OnIdle(self, event):
  59         self.idleCtrl.SetValue(str(self.count))
  60         self.count = self.count + 1
  61
  62     def OnSize(self, event):
  63         size = event.GetSize()
  64         self.sizeCtrl.SetValue("%s, %s" % (size.width, size.height))
  65         event.Skip()
  66
  67     def OnMove(self, event):
  68         pos = event.GetPosition()
  69         self.posCtrl.SetValue("%s, %s" % (pos.x, pos.y))
  70
  71
  72
  73 #---------------------------------------------------------------------------
  74
  75 class MyApp(wxApp):
  76     def MainLoop(self):
  77         # This outer loop determines when to exit the application,  for
  78         # this example we let the main frame reset this flag when it
  79         # closes.
  80         while self.keepGoing:
  81             # At this point in the outer loop you could do whatever you
  82             # implemented your own MainLoop for.  It should be quick and
  83             # non-blocking, otherwise your GUI will freeze.  For example,
  84             # call Fnorb's reactor.do_one_event(0), etc.
  85
  86             # call_your_code_here()
  87
  88
  89             # This inner loop will process any GUI events until there
  90             # are no more waiting.
  91             while self.Pending():
  92                 self.Dispatch()
  93
  94             # Send idle events to idle handlers.  You may want to throtle
  95             # this back a bit so there is not too much CPU time spent in
  96             # the idle handlers.  For this example, I'll just snooze a
  97             # little...
  98             time.sleep(0.25)
  99             self.ProcessIdle()
 100
 101
 102
 103     def OnInit(self):
 104         frame = MyFrame(NULL, -1, "This is a test")
 105         frame.Show(true)
 106         self.SetTopWindow(frame)
 107
 108         self.keepGoing = true
 109
 110         return true
 111
 112
 113 app = MyApp(0)
 114 app.MainLoop()
 115
 116
 117
 118
 119