#!/usr/bin/env python
# The Python version of Qwt-5.0.0/examples/radio
import sys
from PyQt4 import Qt
import PyQt4.Qwt5 as Qwt
from math import *
#-- tunerfrm.cpp --#
class TuningThermo(Qt.QWidget):
def __init__(self, *args):
Qt.QWidget.__init__(self, *args)
self.thermo = Qwt.QwtThermo(self)
self.thermo.setOrientation(Qt.Qt.Horizontal, Qwt.QwtThermo.NoScale)
self.thermo.setRange(0.0, 1.0)
self.thermo.setFillColor(Qt.Qt.green)
label = Qt.QLabel("Tuning", self)
label.setAlignment(Qt.Qt.AlignCenter)
layout = Qt.QVBoxLayout(self)
layout.setMargin(0)
layout.addWidget(self.thermo)
layout.addWidget(label)
self.setFixedWidth(3*label.sizeHint().width())
# __init__()
def setValue(self, value):
self.thermo.setValue(value)
# setValue()
# class TuningThermo
class TunerFrame(Qt.QFrame):
def __init__(self, *args):
Qt.QFrame.__init__(self, *args)
self.frequencySlider = Qwt.QwtSlider(
self, Qt.Qt.Horizontal, Qwt.QwtSlider.TopScale)
self.frequencySlider.setScaleMaxMinor(5)
self.frequencySlider.setScaleMaxMajor(12)
self.frequencySlider.setThumbLength(80)
self.frequencySlider.setBorderWidth(1)
self.frequencySlider.setRange(87.5, 108, 0.01, 10)
self.tuningThermo = TuningThermo(self)
self.frequencyWheel = Qwt.QwtWheel(self)
self.frequencyWheel.setMass(0.5)
self.frequencyWheel.setRange(87.5, 108, 0.01)
self.frequencyWheel.setTotalAngle(3600.0)
self.connect(self.frequencyWheel,
Qt.SIGNAL("valueChanged(double)"),
self.adjustFreq)
self.connect(self.frequencySlider,
Qt.SIGNAL("valueChanged(double)"),
self.adjustFreq)
mainLayout = Qt.QVBoxLayout(self)
mainLayout.setMargin(10)
mainLayout.setSpacing(5)
mainLayout.addWidget(self.frequencySlider)
hLayout = Qt.QHBoxLayout()
hLayout.setMargin(0)
hLayout.addWidget(self.tuningThermo, 0)
hLayout.addStretch(5)
hLayout.addWidget(self.frequencyWheel, 2)
mainLayout.addLayout(hLayout)
# __init__()
def adjustFreq(self, f):
factor = 13.0 / (108 - 87.5)
x = (f - 87.5) * factor
field = (sin(x) * cos(4.0 * x))**2
self.tuningThermo.setValue(field)
if self.frequencySlider.value() != f:
self.frequencySlider.setValue(f)
if self.frequencyWheel.value() != f:
self.frequencyWheel.setValue(f)
self.emit(Qt.SIGNAL("fieldChanged(double)"), field)
# adjustFreq()
def setFreq(self, f):
self.frequencyWheel.setValue(f)
# setFreq()
# class TunerFrame
#-- ampfrm.cpp --#
class Knob(Qt.QWidget):
def __init__(self, title, min, max, parent):
Qt.QWidget.__init__(self, parent)
self.knob = Qwt.QwtKnob(self)
self.knob.setRange(min, max, 0, 1)
self.knob.setScaleMaxMajor(10)
self.knob.setKnobWidth(50)
self.label = Qt.QLabel(title, self)
self.label.setAlignment(Qt.Qt.AlignTop | Qt.Qt.AlignHCenter)
self.setSizePolicy(Qt.QSizePolicy.MinimumExpanding,
Qt.QSizePolicy.MinimumExpanding)
# __init__()
def sizeHint(self):
sz1 = self.knob.sizeHint()
sz2 = self.label.sizeHint()
w = max(sz1.width(), sz2.width())
h = sz1.height() + sz2.height()
off = self.knob.scaleDraw().extent(Qt.QPen(), self.knob.font())
off -= 10 # spacing
return Qt.QSize(w, h - off)
# sizeHint()
def value(self):
return self.knob.value()
# value()
def resizeEvent(self, event):
sz = event.size()
h = self.label.sizeHint().height()
self.label.setGeometry(0, sz.height() - h, sz.width(), h)
h = self.knob.sizeHint().height()
off = self.knob.scaleDraw().extent(Qt.QPen(), self.knob.font())
off -= 10 # spacing
self.knob.setGeometry(0, self.label.pos().y() - h + off, sz.width(), h)
# resizeEvent()
# class Knob
class Thermo(Qt.QWidget):
def __init__(self, title, parent):
Qt.QWidget.__init__(self, parent)
self.thermo = Qwt.QwtThermo(self)
self.thermo.setPipeWidth(6)
self.thermo.setRange(-40, 10)
self.thermo.setFillColor(Qt.Qt.green)
self.thermo.setAlarmColor(Qt.Qt.red)
self.thermo.setAlarmLevel(0.0)
self.thermo.setAlarmEnabled(True)
label = Qt.QLabel(title, self)
label.setAlignment(Qt.Qt.AlignTop | Qt.Qt.AlignLeft)
layout = Qt.QVBoxLayout(self)
layout.setMargin(0)
layout.setSpacing(0)
layout.addWidget(self.thermo, 10)
layout.addWidget(label)
# __init__()
def setValue(self, value):
self.thermo.setValue(value)
# setValue()
# class Thermo
class AmplifierFrame(Qt.QFrame):
def __init__(self, *args):
Qt.QFrame.__init__(self, *args)
self.phs = 0.0
self.master = 0.0
self.volumeKnob = Knob('Volume', 0.0, 10.0, self)
self.balanceKnob = Knob('Balance', -10.0, 10.0, self)
self.trebleKnob = Knob('Treble', -10.0, 10.0, self)
self.bassKnob = Knob('Bass', -10.0, 10.0, self)
self.leftThermo = Thermo('Left [dB]', self)
self.rightThermo = Thermo('Right [dB]', self)
layout = Qt.QHBoxLayout(self)
layout.setSpacing(0)
layout.setMargin(10)
layout.addWidget(self.volumeKnob)
layout.addWidget(self.balanceKnob)
layout.addWidget(self.trebleKnob)
layout.addWidget(self.bassKnob)
layout.addSpacing(20)
layout.addStretch(10)
layout.addWidget(self.leftThermo)
layout.addSpacing(10)
layout.addWidget(self.rightThermo)
self.startTimer(50)
# __init__()
def timerEvent(self, event):
sig_bass = (1.0 + 0.1*self.bassKnob.value()) * sin(13.0*self.phs)
sig_mid_l = sin(17.0*self.phs)
sig_mid_r = cos(17.5*self.phs)
sig_trbl_l = 0.5*(1.0+0.1*self.trebleKnob.value()) * sin(35.0*self.phs)
sig_trbl_r = 0.5*(1.0+0.1*self.trebleKnob.value()) * sin(34.0*self.phs)
sig_l = 0.05*self.master*self.volumeKnob.value() * \
(sig_bass+sig_mid_l+sig_trbl_l)**2
sig_r = 0.05*self.master*self.volumeKnob.value() * \
(sig_bass+sig_mid_r+sig_trbl_r)**2
balance = 0.1 * self.balanceKnob.value()
if balance > 0:
sig_l *= (1.0 - balance)
else:
sig_r *= (1.0 + balance)
if sig_l > 0.01:
sig_l = 20.0 * log10(sig_l)
else:
sig_l = -40.0
if sig_r > 0.01:
sig_r = 20.0 * log10(sig_r)
else:
sig_r = - 40.0
self.leftThermo.setValue(sig_l)
self.rightThermo.setValue(sig_r)
self.phs += pi / 100
if self.phs > pi:
self.phs = 0
# timerEvent()
def setMaster(self, value):
self.master = value
# setMaster()
# class AmplifierFrame
#-- radio.cpp --#
class RadioDemo(Qt.QWidget):
def __init__(self, *args):
Qt.QWidget.__init__(self, *args)
tunerFrame = TunerFrame(self)
tunerFrame.setFrameStyle(Qt.QFrame.Panel | Qt.QFrame.Raised)
amplifierFrame = AmplifierFrame(self)
amplifierFrame.setFrameStyle(Qt.QFrame.Panel | Qt.QFrame.Raised)
layout = Qt.QVBoxLayout(self)
layout.setMargin(0)
layout.setSpacing(0)
layout.addWidget(tunerFrame)
layout.addWidget(amplifierFrame)
self.connect(tunerFrame,
Qt.SIGNAL("fieldChanged(double)"),
amplifierFrame.setMaster)
tunerFrame.setFreq(90.0)
# __init__()
# class RadioDemo
def make():
demo = RadioDemo()
demo.show()
return demo
# make()
def main(args):
app = Qt.QApplication(args)
demo = make()
sys.exit(app.exec_())
# main()
# Admire!
if __name__ == '__main__':
main(sys.argv)
# Local Variables: ***
# mode: python ***
# End: ***
