plchat/videowidget.py

#!/usr/bin/env python


#############################################################################
##
## Copyright (C) 2013 Riverbank Computing Limited.
## Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
## All rights reserved.
##
## This file is part of the examples of PyQt.
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##     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.
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## $QT_END_LICENSE$
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#############################################################################

from qtpy import QtWidgets, QtCore
from qtpy.QtCore import QDir, Qt, QUrl, QSize
from qtpy.QtMultimedia import QMediaContent, QMediaPlayer, QMediaPlaylist
from qtpy.QtMultimediaWidgets import QVideoWidget
from qtpy.QtWidgets import (QApplication, QFileDialog, QHBoxLayout, QLabel,
        QPushButton, QSizePolicy, QSlider, QStyle, QVBoxLayout, QWidget, QDesktopWidget)
from qtpy.QtGui import QDesktopServices


class VideoPlayer(QWidget):

    def __init__(self, url, parent=None):
        super(VideoPlayer, self).__init__(parent)

        self.setSizePolicy(QSizePolicy.MinimumExpanding, QSizePolicy.Preferred)

        self.mediaPlayer = QMediaPlayer(None, QMediaPlayer.VideoSurface)

        self.videoWidget = LinkPlayer(url)
        self.videoWidget.setAspectRatioMode(Qt.KeepAspectRatio)

        self.playlist = QMediaPlaylist()
        self.playlist.setPlaybackMode(QMediaPlaylist.Loop)

        self.mediaPlayer.setPlaylist(self.playlist)

        self.playButton = QPushButton()
        self.playButton.setEnabled(False)
        self.playButton.setIcon(self.style().standardIcon(QStyle.SP_MediaPlay))
        self.playButton.clicked.connect(self.play)

        self.positionSlider = ClickSlider()
        self.positionSlider.setOrientation(Qt.Horizontal)
        self.positionSlider.setRange(0, 0)
        self.positionSlider.sliderMoved.connect(self.setPosition)

        #self.volumeSlider = QSlider(Qt.Horizontal)
        #self.volumeSlider.setRange(0, 100)
        #self.volumeSlider.setSliderPosition(100)
        #self.volumeSlider.sliderMoved.connect(self.mediaPlayer.setVolume)

        self.volumeButton = QPushButton()
        self.volumeButton.setEnabled(False)
        self.volumeButton.setIcon(self.style().standardIcon(QStyle.SP_MediaVolume))
        self.volumeButton.clicked.connect(self.doMute)

        self.errorLabel = QLabel()
        self.errorLabel.setSizePolicy(QSizePolicy.Preferred,
                QSizePolicy.Maximum)

        controlLayout = QHBoxLayout()
        controlLayout.setContentsMargins(0, 0, 0, 0)
        controlLayout.addWidget(self.playButton, 1)
        controlLayout.addWidget(self.positionSlider, 10)
        controlLayout.addWidget(self.volumeButton, 1)
        #controlLayout.addWidget(self.volumeSlider, 1)

        layout = QVBoxLayout()
        layout.addWidget(self.videoWidget)
        layout.addLayout(controlLayout)
        layout.addWidget(self.errorLabel)

        self.setLayout(layout)

        self.mediaPlayer.setVideoOutput(self.videoWidget)
        self.mediaPlayer.stateChanged.connect(self.mediaStateChanged)
        self.mediaPlayer.positionChanged.connect(self.positionChanged)
        self.mediaPlayer.durationChanged.connect(self.durationChanged)
        self.mediaPlayer.error.connect(self.handleError)

    def openFile(self, fileName):
        if fileName != '':
            
            self.playlist.addMedia(QMediaContent(QUrl(fileName)))
            self.playlist.next()
            
            
            self.mediaPlayer.play()
            self.mediaPlayer.pause()
            #self.mediaPlayer.setMedia(
            #        QMediaContent(QUrl(fileName)))
                    #QMediaContent(QUrl.fromLocalFile(fileName)))
            self.playButton.setEnabled(True)
            self.volumeButton.setEnabled(True)
            #self.mediaPlayer.playlist().setPlaybackMode(QMediaPlaylist.Loop)

    def play(self):
        if self.mediaPlayer.state() == QMediaPlayer.PlayingState:
            self.mediaPlayer.pause()
        else:
            self.mediaPlayer.play()

    def mediaStateChanged(self, state):
        if self.mediaPlayer.state() == QMediaPlayer.PlayingState:
            self.playButton.setIcon(
                    self.style().standardIcon(QStyle.SP_MediaPause))
        else:
            self.playButton.setIcon(
                    self.style().standardIcon(QStyle.SP_MediaPlay))

    def positionChanged(self, position):
        self.positionSlider.setValue(position)

    def durationChanged(self, duration):
        self.positionSlider.setRange(0, duration)

    def setPosition(self, position):
        self.mediaPlayer.setPosition(position)
    
    def doMute(self, checked):
        self.mediaPlayer.setMuted(not self.mediaPlayer.isMuted())
        if self.mediaPlayer.isMuted():
            self.volumeButton.setIcon(self.style().standardIcon(QStyle.SP_MediaVolumeMuted))
        else:
            self.volumeButton.setIcon(self.style().standardIcon(QStyle.SP_MediaVolume))

    def handleError(self):
        self.playButton.setEnabled(False)
        self.errorLabel.setText("Error: " + self.mediaPlayer.errorString())

    def sizeHint(self):
        return QSize(250, round(QDesktopWidget().screenGeometry(-1).height() * 0.6))

class ClickSlider(QtWidgets.QSlider):
    def mousePressEvent(self, event):
        super(ClickSlider, self).mousePressEvent(event)
        if event.button() == QtCore.Qt.LeftButton:
            val = self.pixelPosToRangeValue(event.pos())
            self.setValue(val)

    def pixelPosToRangeValue(self, pos):
        opt = QtWidgets.QStyleOptionSlider()
        self.initStyleOption(opt)
        gr = self.style().subControlRect(QtWidgets.QStyle.CC_Slider, opt, QtWidgets.QStyle.SC_SliderGroove, self)
        sr = self.style().subControlRect(QtWidgets.QStyle.CC_Slider, opt, QtWidgets.QStyle.SC_SliderHandle, self)

        if self.orientation() == QtCore.Qt.Horizontal:
            sliderLength = sr.width()
            sliderMin = gr.x()
            sliderMax = gr.right() - sliderLength + 1
        else:
            sliderLength = sr.height()
            sliderMin = gr.y()
            sliderMax = gr.bottom() - sliderLength + 1;
        pr = pos - sr.center() + sr.topLeft()
        p = pr.x() if self.orientation() == QtCore.Qt.Horizontal else pr.y()
        return QtWidgets.QStyle.sliderValueFromPosition(self.minimum(), self.maximum(), p - sliderMin,
                                               sliderMax - sliderMin, opt.upsideDown)

class LinkPlayer(QVideoWidget):
    def __init__(self, url, *args, **kwargs):
        super(LinkPlayer, self).__init__(*args, **kwargs)
        self.url = QUrl(url)
        super().setCursor(Qt.PointingHandCursor)
    def mouseReleaseEvent(self, event):
        bttn = event.button()
        modif = event.modifiers()
        if modif == Qt.NoModifier and bttn == Qt.LeftButton:
            QDesktopServices.openUrl(self.url)

if __name__ == '__main__':

    import sys

    app = QApplication(sys.argv)

    player = VideoPlayer()
    player.resize(320, 240)
    player.show()

    sys.exit(app.exec_())