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/Global>
  24 #include <Phonon/MediaObject>
  25 #include <Phonon/SeekSlider>
  26 #include <Phonon/VideoPlayer>
  27
  28 #include <QVBoxLayout>
  29 #include <QHBoxLayout>
  30 #include <QShowEvent>
  31 #include <QToolButton>
  32
  33 #include <KDialog>
  34 #include <KIcon>
  35 #include <KUrl>
  36 #include <KLocale>
  37
  38 class EmbeddedVideoPlayer : public Phonon::VideoPlayer
  39 {
  40     public:
  41         EmbeddedVideoPlayer(Phonon::Category category, QWidget *parent = 0) :
  42             Phonon::VideoPlayer(category, parent)
  43         {
  44         }
  45
  46         void setSizeHint(const QSize& size)
  47         {
  48             m_sizeHint = size;
  49             updateGeometry();
  50         }
  51
  52         virtual QSize sizeHint() const
  53         {
  54             return m_sizeHint.isValid() ? m_sizeHint : Phonon::VideoPlayer::sizeHint();
  55         }
  56
  57     private:
  58         QSize m_sizeHint;
  59 };
  60
  61 PhononWidget::PhononWidget(QWidget *parent)
  62     : QWidget(parent),
  63     m_mode(Audio),
  64     m_url(),
  65     m_playButton(0),
  66     m_stopButton(0),
  67     m_topLayout(0),
  68     m_audioMedia(0),
  69     m_media(0),
  70     m_seekSlider(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::setMode(Mode mode)
  89 {
  90     if (m_mode != mode) {
  91         stop(); // emits playingStopped() signal
  92         m_mode = mode;
  93     }
  94 }
  95
  96 PhononWidget::Mode PhononWidget::mode() const
  97 {
  98     return m_mode;
  99 }
 100
 101 void PhononWidget::setVideoSize(const QSize& size)
 102 {
 103     if (m_videoSize != size) {
 104         m_videoSize = size;
 105         applyVideoSize();
 106     }
 107 }
 108
 109 QSize PhononWidget::videoSize() const
 110 {
 111     return m_videoSize;
 112 }
 113
 114 void PhononWidget::showEvent(QShowEvent *event)
 115 {
 116     if (event->spontaneous()) {
 117         QWidget::showEvent(event);
 118         return;
 119     }
 120
 121     if (m_topLayout == 0) {
 122         m_topLayout = new QVBoxLayout(this);
 123         m_topLayout->setMargin(0);
 124         m_topLayout->setSpacing(KDialog::spacingHint());
 125         QHBoxLayout *controlsLayout = new QHBoxLayout(this);
 126         controlsLayout->setMargin(0);
 127         controlsLayout->setSpacing(0);
 128
 129         m_playButton = new QToolButton(this);
 130         m_stopButton = new QToolButton(this);
 131         m_seekSlider = new Phonon::SeekSlider(this);
 132
 133         controlsLayout->addWidget(m_playButton);
 134         controlsLayout->addWidget(m_stopButton);
 135         controlsLayout->addWidget(m_seekSlider);
 136
 137         m_topLayout->addLayout(controlsLayout);
 138
 139         m_playButton->setToolTip(i18n("play"));
 140         m_playButton->setIconSize(QSize(16, 16));
 141         m_playButton->setIcon(KIcon("media-playback-start"));
 142         connect(m_playButton, SIGNAL(clicked()), this, SLOT(play()));
 143
 144         m_stopButton->setToolTip(i18n("stop"));
 145         m_stopButton->setIconSize(QSize(16, 16));
 146         m_stopButton->setIcon(KIcon("media-playback-stop"));
 147         m_stopButton->hide();
 148         connect(m_stopButton, SIGNAL(clicked()), this, SLOT(stop()));
 149
 150         m_seekSlider->setIconVisible(false);
 151
 152         // Creating an audio player or video player instance might take up to
 153         // 2 seconds when doing it the first time. To prevent that the user
 154         // interface gets noticeable blocked, the creation is delayed until
 155         // the play button has been pressed (see PhononWidget::play()).
 156     }
 157 }
 158
 159 void PhononWidget::hideEvent(QHideEvent *event)
 160 {
 161     QWidget::hideEvent(event);
 162     if (!event->spontaneous()) {
 163         stop();
 164     }
 165 }
 166
 167 void PhononWidget::stateChanged(Phonon::State newstate)
 168 {
 169     setUpdatesEnabled(false);
 170     switch (newstate) {
 171     case Phonon::PlayingState:
 172     case Phonon::BufferingState:
 173         m_stopButton->show();
 174         m_playButton->hide();
 175         break;
 176     default:
 177         m_stopButton->hide();
 178         m_playButton->show();
 179         break;
 180     }
 181     setUpdatesEnabled(true);
 182 }
 183
 184 void PhononWidget::play()
 185 {
 186     switch (m_mode) {
 187     case Audio:
 188         if (m_audioMedia == 0) {
 189             m_audioMedia = Phonon::createPlayer(Phonon::MusicCategory, m_url);
 190             m_audioMedia->setParent(this);
 191         }
 192         m_media = m_audioMedia;
 193         m_media->setCurrentSource(m_url);
 194         m_media->play();
 195         break;
 196
 197     case Video:
 198         if (m_videoPlayer == 0) {
 199             m_videoPlayer = new EmbeddedVideoPlayer(Phonon::VideoCategory, this);
 200             m_topLayout->insertWidget(0, m_videoPlayer);
 201         }
 202         applyVideoSize();
 203         m_videoPlayer->show();
 204         m_videoPlayer->play(m_url);
 205         m_media = m_videoPlayer->mediaObject();
 206         break;
 207
 208     default:
 209         break;
 210     }
 211
 212     Q_ASSERT(m_media != 0);
 213     connect(m_media, SIGNAL(stateChanged(Phonon::State, Phonon::State)),
 214             this, SLOT(stateChanged(Phonon::State)));
 215     m_seekSlider->setMediaObject(m_media);
 216
 217     emit playingStarted();
 218 }
 219
 220 void PhononWidget::stop()
 221 {
 222     if (m_media != 0) {
 223         m_media->stop();
 224         disconnect(m_media, SIGNAL(stateChanged(Phonon::State, Phonon::State)),
 225                    this, SLOT(stateChanged(Phonon::State)));
 226         emit playingStopped();
 227
 228         m_stopButton->hide();
 229         m_playButton->show();
 230     }
 231
 232     if (m_videoPlayer != 0) {
 233         m_videoPlayer->hide();
 234     }
 235 }
 236
 237 void PhononWidget::applyVideoSize()
 238 {
 239     if ((m_videoPlayer != 0) && m_videoSize.isValid()) {
 240         m_videoPlayer->setSizeHint(m_videoSize);
 241     }
 242 }