attachment:metronome2.py of Metronome

   1 '''metronome2
   2 Now try to get a visual component flashing with each beat
   3 '''
   4 import wx
   5 
   6 mspm = 60*1000 # milliseconds per minute
   7     
   8 class MFrame(wx.Frame):
   9     def __init__(self,):
  10         wx.Frame.__init__(self,None)
  11         #define the components
  12         self.go = wx.Button(self,wx.ID_ANY,"Start")
  13         self.stop = wx.Button(self,wx.ID_ANY,"Stop")
  14         self.bpm = wx.SpinCtrl(self,wx.ID_ANY,value="120",min=1,max=240)
  15         self.dingcheck = wx.CheckBox(self,wx.ID_ANY)
  16         self.downbeat = wx.SpinCtrl(self,wx.ID_ANY,value="4",min = 2, max=12)
  17         self.flashcheck = wx.CheckBox(self,wx.ID_ANY,"Flash")
  18         self.flash = wx.Panel(self,wx.ID_ANY,size=(150,150))
  19 
  20         self.dingcheck.SetValue(False)
  21         self.downbeat.Enable(False)
  22         self.flashing = True
  23         self.flashcheck.SetValue(True)
  24         self.SetFlash()
  25         
  26         #do the layout
  27         sizer = wx.BoxSizer(wx.VERTICAL)
  28         sizer.Add(wx.StaticText(self,wx.ID_ANY,"Set the beats per minute"))
  29         sizer.Add(self.bpm)
  30         sizer.Add(self.go)
  31         sizer.Add(self.stop)
  32         s2 = wx.BoxSizer(wx.HORIZONTAL)
  33         s2.Add(self.dingcheck,0,wx.ALIGN_CENTRE_VERTICAL)
  34         s2.Add(wx.StaticText(self,wx.ID_ANY,"Beats per measure"),0,wx.ALIGN_CENTRE_VERTICAL)
  35         s2.Add(self.downbeat)
  36         sizer.Add(s2)
  37         sizer.Add(self.flashcheck,0,wx.ALIGN_CENTRE)
  38         sizer.Add(self.flash,1,wx.ALL|wx.EXPAND|wx.ALIGN_CENTRE,10)
  39         self.SetSizerAndFit(sizer)
  40         self.Layout()
  41         
  42         #Bind events
  43         self.Bind(wx.EVT_BUTTON,self.Start,self.go)
  44         self.Bind(wx.EVT_BUTTON,self.Stop,self.stop)
  45         self.Bind(wx.EVT_TIMER,self.Tick)
  46         self.Bind(wx.EVT_CHECKBOX,self.SetDownBeat,self.dingcheck)
  47 
  48     def SetFlash(self):
  49         if self.flashcheck.IsChecked():
  50             if self.flashing:
  51                 self.flash.SetBackgroundColour('White')
  52             else:
  53                 self.flash.SetBackgroundColour('Black')
  54             self.flash.Refresh()
  55         self.flashing = not self.flashing
  56         
  57     def SetDownBeat(self,evt):
  58         if self.dingcheck.IsChecked():
  59             self.downbeat.Enable(True)
  60         else:
  61             self.downbeat.Enable(False)
  62             
  63     def Start(self,evt):
  64         self.timer=wx.Timer(self)
  65         self.count = 0
  66         self.timer.Start(mspm/float(self.bpm.GetValue()))
  67         self.go.Enable(False)
  68         self.stop.Enable(True)
  69 
  70     def Stop(self,evt):
  71         self.timer.Stop()
  72         del self.timer
  73         self.go.Enable(True)
  74         self.stop.Enable(False)
  75 
  76     def Tick(self,evt):
  77         if bool(self.count):
  78             sound = wx.Sound('tick2.wav')
  79         else:
  80             if self.dingcheck.IsChecked():
  81                 sound = wx.Sound('ding.wav')
  82             else:
  83                 sound = wx.Sound('tick2.wav')
  84         sound.Play(wx.SOUND_ASYNC)
  85         self.SetFlash()
  86         self.count = (self.count + 1) % int(self.downbeat.GetValue())
  87         wx.YieldIfNeeded()
  88         
  89 class TestApp(wx.App):
  90     def OnInit(self):
  91         mainframe = MFrame()
  92         self.SetTopWindow(mainframe)
  93         mainframe.Show()
  94         return 1
  95 
  96 
  97 app = TestApp(0)
  98 app.MainLoop()