src/panels/information/phononwidget.cpp

   1 /*  This file is part of the KDE project
   2     Copyright (C) 2007 Matthias Kretz <kretz@kde.org>
   3
   4     This program is free software; you can redistribute it and/or
   5     modify it under the terms of the GNU General Public License as
   6     published by the Free Software Foundation; either version 2 of
   7     the License, or (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  17     02110-1301, USA.
  18
  19 */
  20
  21 #include "phononwidget.h"
  22
  23 #include <Phonon/AudioOutput>
  24 #include <Phonon/Global>
  25 #include <Phonon/MediaObject>
  26 #include <Phonon/SeekSlider>
  27 #include <Phonon/VideoWidget>
  28
  29 #include <QVBoxLayout>
  30 #include <QHBoxLayout>
  31 #include <QShowEvent>
  32 #include <QToolButton>
  33
  34 #include <KDialog>
  35 #include <KIcon>
  36 #include <KUrl>
  37 #include <KLocale>
  38
  39 class EmbeddedVideoPlayer : public Phonon::VideoWidget
  40 {
  41     public:
  42         EmbeddedVideoPlayer(QWidget *parent = 0) :
  43             Phonon::VideoWidget(parent)
  44         {
  45         }
  46
  47         void setSizeHint(const QSize& size)
  48         {
  49             m_sizeHint = size;
  50             updateGeometry();
  51         }
  52
  53         virtual QSize sizeHint() const
  54         {
  55             return m_sizeHint.isValid() ? m_sizeHint : Phonon::VideoWidget::sizeHint();
  56         }
  57
  58     private:
  59         QSize m_sizeHint;
  60 };
  61
  62 PhononWidget::PhononWidget(QWidget *parent)
  63     : QWidget(parent),
  64     m_url(),
  65     m_playButton(0),
  66     m_stopButton(0),
  67     m_topLayout(0),
  68     m_media(0),
  69     m_seekSlider(0),
  70     m_audioOutput(0),
  71     m_videoPlayer(0)
  72 {
  73 }
  74
  75 void PhononWidget::setUrl(const KUrl &url)
  76 {
  77     if (m_url != url) {
  78         stop(); // emits playingStopped() signal
  79         m_url = url;
  80     }
  81 }
  82
  83 KUrl PhononWidget::url() const
  84 {
  85     return m_url;
  86 }
  87
  88 void PhononWidget::setVideoSize(const QSize& size)
  89 {
  90     if (m_videoSize != size) {
  91         m_videoSize = size;
  92         applyVideoSize();
  93     }
  94 }
  95
  96 QSize PhononWidget::videoSize() const
  97 {
  98     return m_videoSize;
  99 }
 100
 101 void PhononWidget::showEvent(QShowEvent *event)
 102 {
 103     if (event->spontaneous()) {
 104         QWidget::showEvent(event);
 105         return;
 106     }
 107
 108     if (!m_topLayout) {
 109         m_topLayout = new QVBoxLayout(this);
 110         m_topLayout->setMargin(0);
 111         m_topLayout->setSpacing(KDialog::spacingHint());
 112         QHBoxLayout *controlsLayout = new QHBoxLayout(this);
 113         controlsLayout->setMargin(0);
 114         controlsLayout->setSpacing(0);
 115
 116         m_playButton = new QToolButton(this);
 117         m_stopButton = new QToolButton(this);
 118         m_seekSlider = new Phonon::SeekSlider(this);
 119
 120         controlsLayout->addWidget(m_playButton);
 121         controlsLayout->addWidget(m_stopButton);
 122         controlsLayout->addWidget(m_seekSlider);
 123
 124         m_topLayout->addLayout(controlsLayout);
 125
 126         const int smallIconSize = IconSize(KIconLoader::Small);
 127         const QSize buttonSize(smallIconSize, smallIconSize);
 128
 129         m_playButton->setToolTip(i18n("play"));
 130         m_playButton->setIconSize(buttonSize);
 131         m_playButton->setIcon(KIcon("media-playback-start"));
 132         m_playButton->setAutoRaise(true);
 133         connect(m_playButton, SIGNAL(clicked()), this, SLOT(play()));
 134
 135         m_stopButton->setToolTip(i18n("stop"));
 136         m_stopButton->setIconSize(buttonSize);
 137         m_stopButton->setIcon(KIcon("media-playback-stop"));
 138         m_stopButton->setAutoRaise(true);
 139         m_stopButton->hide();
 140         connect(m_stopButton, SIGNAL(clicked()), this, SLOT(stop()));
 141
 142         m_seekSlider->setIconVisible(false);
 143
 144         // Creating an audio player or video player instance might take up to
 145         // 2 seconds when doing it the first time. To prevent that the user
 146         // interface gets noticeable blocked, the creation is delayed until
 147         // the play button has been pressed (see PhononWidget::play()).
 148     }
 149 }
 150
 151 void PhononWidget::hideEvent(QHideEvent *event)
 152 {
 153     QWidget::hideEvent(event);
 154     if (!event->spontaneous()) {
 155         stop();
 156     }
 157 }
 158
 159 void PhononWidget::stateChanged(Phonon::State newstate)
 160 {
 161     setUpdatesEnabled(false);
 162     switch (newstate) {
 163     case Phonon::PlayingState:
 164     case Phonon::BufferingState:
 165         m_stopButton->show();
 166         m_playButton->hide();
 167         break;
 168     case Phonon::StoppedState:
 169         if (m_videoPlayer) {
 170             m_videoPlayer->hide();
 171         }
 172         emit hasVideoChanged(false);
 173         // fall through
 174     default:
 175         m_stopButton->hide();
 176         m_playButton->show();
 177         break;
 178     }
 179     setUpdatesEnabled(true);
 180 }
 181
 182 void PhononWidget::play()
 183 {
 184     if (!m_media) {
 185         m_media = new Phonon::MediaObject(this);
 186         connect(m_media, SIGNAL(stateChanged(Phonon::State,Phonon::State)),
 187                 this, SLOT(stateChanged(Phonon::State)));
 188         connect(m_media, SIGNAL(hasVideoChanged(bool)),
 189                 this, SLOT(slotHasVideoChanged(bool)));
 190         m_seekSlider->setMediaObject(m_media);
 191     }
 192
 193     if (!m_videoPlayer) {
 194         m_videoPlayer = new EmbeddedVideoPlayer(this);
 195         m_topLayout->insertWidget(0, m_videoPlayer);
 196         Phonon::createPath(m_media, m_videoPlayer);
 197         applyVideoSize();
 198     }
 199
 200     if (!m_audioOutput) {
 201         m_audioOutput = new Phonon::AudioOutput(Phonon::MusicCategory, this);
 202         Phonon::createPath(m_media, m_audioOutput);
 203     }
 204
 205     emit hasVideoChanged(false);
 206
 207     m_media->setCurrentSource(m_url);
 208     m_media->hasVideo();
 209     m_media->play();
 210 }
 211
 212 void PhononWidget::stop()
 213 {
 214     if (m_media) {
 215         m_media->stop();
 216     }
 217 }
 218
 219 void PhononWidget::slotHasVideoChanged(bool hasVideo)
 220 {
 221     emit hasVideoChanged(hasVideo);
 222
 223     if (hasVideo) {
 224         m_videoPlayer->show();
 225     }
 226 }
 227
 228 void PhononWidget::applyVideoSize()
 229 {
 230     if ((m_videoPlayer) && m_videoSize.isValid()) {
 231         m_videoPlayer->setSizeHint(m_videoSize);
 232     }
 233 }