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#!/usr/bin/env python
#############################################################################
##
## Copyright (C) 2010 Riverbank Computing Limited.
## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
## All rights reserved.
##
## This file is part of the examples of PyQt.
##
## $QT_BEGIN_LICENSE:BSD$
## You may use this file under the terms of the BSD license as follows:
##
## "Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions are
## met:
## * Redistributions of source code must retain the above copyright
## notice, this list of conditions and the following disclaimer.
## * Redistributions in binary form must reproduce the above copyright
## notice, this list of conditions and the following disclaimer in
## the documentation and/or other materials provided with the
## distribution.
## * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
## the names of its contributors may be used to endorse or promote
## products derived from this software without specific prior written
## permission.
##
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
## $QT_END_LICENSE$
##
#############################################################################
# This is only needed for Python v2 but is harmless for Python v3.
import sip
sip.setapi('QVariant', 2)
import sys
from PyQt4 import QtCore, QtGui
try:
from PyQt4.phonon import Phonon
except ImportError:
app = QtGui.QApplication(sys.argv)
QtGui.QMessageBox.critical(None, "Phonon Capabilities",
"Your Qt installation does not have Phonon support.",
QtGui.QMessageBox.Ok | QtGui.QMessageBox.Default,
QtGui.QMessageBox.NoButton)
sys.exit(1)
class Window(QtGui.QWidget):
def __init__(self):
super(QtGui.QWidget, self).__init__()
self.setupUi()
self.updateWidgets()
notifier = Phonon.BackendCapabilities.notifier()
notifier.capabilitiesChanged.connect(self.updateWidgets)
notifier.availableAudioOutputDevicesChanged.connect(self.updateWidgets)
def updateWidgets(self):
# Output devices.
devices = Phonon.BackendCapabilities.availableAudioOutputDevices()
model = Phonon.AudioOutputDeviceModel(devices)
self.devicesListView.setModel(model)
# MIME types.
self.mimeListWidget.clear()
for mimeType in Phonon.BackendCapabilities.availableMimeTypes():
item = QtGui.QListWidgetItem(self.mimeListWidget)
item.setText(mimeType)
# Effects.
self.effectsTreeWidget.clear()
for effect in Phonon.BackendCapabilities.availableAudioEffects():
item = QtGui.QTreeWidgetItem(self.effectsTreeWidget)
item.setText(0, "Effect")
item.setText(1, effect.name())
item.setText(2, effect.description())
# Effects parameters.
for parameter in Phonon.Effect(effect, self).parameters():
defaultValue = parameter.defaultValue()
minimumValue = parameter.minimumValue()
maximumValue = parameter.maximumValue()
valueString = "%s / %s / %s" % (defaultValue, minimumValue, maximumValue)
parameterItem = QtGui.QTreeWidgetItem(item)
parameterItem.setText(0, "Parameter")
parameterItem.setText(1, parameter.name())
parameterItem.setText(2, parameter.description())
parameterItem.setText(3, QtCore.QVariant.typeToName(parameter.type()))
parameterItem.setText(4, valueString)
for i in range(self.effectsTreeWidget.columnCount()):
if i == 0:
self.effectsTreeWidget.setColumnWidth(0, 150)
elif i == 2:
self.effectsTreeWidget.setColumnWidth(2, 350)
else:
self.effectsTreeWidget.resizeColumnToContents(i)
def setupUi(self):
self.setupBackendBox()
layout = QtGui.QVBoxLayout()
layout.addWidget(self.backendBox)
self.setLayout(layout)
self.setWindowTitle("Backend Capabilities Example")
def setupBackendBox(self):
self.devicesLabel = QtGui.QLabel("Available Audio Devices:")
self.devicesListView = QtGui.QListView()
self.mimeTypesLabel = QtGui.QLabel("Supported MIME Types:")
self.mimeListWidget = QtGui.QListWidget()
self.effectsLabel = QtGui.QLabel("Available Audio Effects:")
headerLabels = ("Type", "Name", "Description", "Value Type",
"Default/Min/Max Values")
self.effectsTreeWidget = QtGui.QTreeWidget()
self.effectsTreeWidget.setHeaderLabels(headerLabels)
self.effectsTreeWidget.setColumnCount(5)
layout = QtGui.QGridLayout()
layout.addWidget(self.devicesLabel, 0, 0)
layout.addWidget(self.devicesListView, 1, 0)
layout.addWidget(self.mimeTypesLabel, 0, 1)
layout.addWidget(self.mimeListWidget, 1, 1)
layout.addWidget(self.effectsLabel, 2, 0)
layout.addWidget(self.effectsTreeWidget, 3, 0, 2, 2)
layout.setRowStretch(3, 100)
self.backendBox = QtGui.QGroupBox("Backend Capabilities")
self.backendBox.setLayout(layout)
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
app.setApplicationName("Phonon Capabilities Example")
window = Window()
window.show()
sys.exit(app.exec_())
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