pyjack-0.5.2/demos/qtransport.py

   1 #!/usr/bin/python
   2 # -*- coding: utf-8 -*-
   3
   4 import jack, os, sys
   5 from PyQt4.QtGui import QApplication, QDialog
   6 from PyQt4.QtCore import QTimer, SIGNAL, SLOT
   7 from PyQt4.uic import loadUi
   8
   9 jack.attach("qtransport")
  10
  11 class MainW(QDialog):
  12     def __init__(self, *args):
  13         QDialog.__init__(self, *args)
  14         loadUi(sys.path[0]+"/qtransport_gui.ui", self)
  15
  16         self.timer = QTimer()
  17         self.timer.start(100)
  18
  19         self.connect(self.b_back, SIGNAL("clicked()"), self.goBack)
  20         self.connect(self.b_play, SIGNAL("clicked()"), self.play)
  21         self.connect(self.b_stop, SIGNAL("clicked()"), self.stop)
  22         self.connect(self.b_forward, SIGNAL("clicked()"), self.goForward)
  23         self.connect(self.timer, SIGNAL("timeout()"), self.refreshUi)
  24
  25     def goBack(self):
  26         pos = int(jack.get_current_transport_frame()) - 100000
  27         if pos < 0:
  28           jack.transport_locate(0)
  29         else:
  30           jack.transport_locate(pos)
  31
  32     def goForward(self):
  33         jack.transport_locate(jack.get_current_transport_frame()+100000)
  34
  35     def play(self):
  36         if (self.b_play.isChecked()):
  37           jack.transport_start()
  38         else:
  39           jack.transport_stop()
  40
  41     def stop(self):
  42         jack.transport_stop()
  43         jack.transport_locate(0)
  44         self.b_play.setChecked(False)
  45
  46     def refreshUi(self):
  47         state = jack.get_transport_state()
  48         frame = jack.get_current_transport_frame()
  49         rate  = jack.get_sample_rate()
  50
  51         # Jack State
  52         if (state == 0):
  53           self.l_state.setText("Stopped")
  54           self.b_play.setChecked(False)
  55         elif (state == 1):
  56           self.l_state.setText("Rolling")
  57           self.b_play.setChecked(True)
  58         elif (state == 3): self.l_state.setText("Starting")
  59         else: self.l_state.setText("Unknown (%i)" % state)
  60
  61         # Current Time
  62         time = frame / rate
  63         secs = time % 60
  64         mins = (time / 60) % 60
  65         hrs  = (time / 3600) % 60
  66         secH = minH = hrsH = ""
  67         if secs < 10: secH = "0"
  68         if mins < 10: minH = "0"
  69         if hrs  < 10: hrsH = "0"
  70         self.l_time.setText(hrsH+str(hrs)+":"+minH+str(mins)+":"+secH+str(secs))
  71
  72         # Current Frame
  73         self.l_frame.setText(str(frame))
  74
  75 #--------------- main ------------------
  76 if __name__ == '__main__':
  77
  78     app = QApplication(sys.argv)
  79     gui = MainW()
  80     gui.show()
  81     app.exec_()
  82     jack.detach()