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 <QtGui/QVBoxLayout>
  29 #include <QtGui/QHBoxLayout>
  30 #include <QtGui/QShowEvent>
  31 #include <QtGui/QToolButton>
  32
  33 #include <kdialog.h>
  34 #include <kicon.h>
  35 #include <kurl.h>
  36 #include <klocale.h>
  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             setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
  45         }
  46
  47         void setSizeHint(const QSize& size)
  48         {
  49             m_sizeHint = size;
  50             setFixedHeight(size.height());
  51             updateGeometry();
  52         }
  53
  54         virtual QSize sizeHint() const
  55         {
  56             return m_sizeHint.isValid() ? m_sizeHint : Phonon::VideoPlayer::sizeHint();
  57         }
  58
  59     private:
  60         QSize m_sizeHint;
  61 };
  62
  63 PhononWidget::PhononWidget(QWidget *parent)
  64     : QWidget(parent),
  65     m_mode(Audio),
  66     m_url(),
  67     m_playButton(0),
  68     m_stopButton(0),
  69     m_topLayout(0),
  70     m_audioMedia(0),
  71     m_media(0),
  72     m_seekSlider(0),
  73     m_videoPlayer(0)
  74 {
  75 }
  76
  77 void PhononWidget::setUrl(const KUrl &url)
  78 {
  79     if (m_url != url) {
  80         stop(); // emits playingStopped() signal
  81         m_url = url;
  82     }
  83 }
  84
  85 KUrl PhononWidget::url() const
  86 {
  87     return m_url;
  88 }
  89
  90 void PhononWidget::setMode(Mode mode)
  91 {
  92     if (m_mode != mode) {
  93         stop(); // emits playingStopped() signal
  94         m_mode = mode;
  95     }
  96 }
  97
  98 PhononWidget::Mode PhononWidget::mode() const
  99 {
 100     return m_mode;
 101 }
 102
 103 void PhononWidget::setVideoSize(const QSize& size)
 104 {
 105     if (m_videoSize != size) {
 106         m_videoSize = size;
 107         applyVideoSize();
 108     }
 109 }
 110
 111 QSize PhononWidget::videoSize() const
 112 {
 113     return m_videoSize;
 114 }
 115
 116 void PhononWidget::showEvent(QShowEvent *event)
 117 {
 118     if (event->spontaneous()) {
 119         QWidget::showEvent(event);
 120         return;
 121     }
 122
 123     if (m_topLayout == 0) {
 124         m_topLayout = new QVBoxLayout(this);
 125         m_topLayout->setMargin(0);
 126         m_topLayout->setSpacing(KDialog::spacingHint());
 127         QHBoxLayout *controlsLayout = new QHBoxLayout(this);
 128         controlsLayout->setMargin(0);
 129         controlsLayout->setSpacing(0);
 130
 131         m_playButton = new QToolButton(this);
 132         m_stopButton = new QToolButton(this);
 133         m_seekSlider = new Phonon::SeekSlider(this);
 134
 135         controlsLayout->addWidget(m_playButton);
 136         controlsLayout->addWidget(m_stopButton);
 137         controlsLayout->addWidget(m_seekSlider);
 138
 139         m_topLayout->addLayout(controlsLayout);
 140
 141         m_playButton->setToolTip(i18n("play"));
 142         m_playButton->setIconSize(QSize(16, 16));
 143         m_playButton->setIcon(KIcon("media-playback-start"));
 144         connect(m_playButton, SIGNAL(clicked()), this, SLOT(play()));
 145
 146         m_stopButton->setToolTip(i18n("stop"));
 147         m_stopButton->setIconSize(QSize(16, 16));
 148         m_stopButton->setIcon(KIcon("media-playback-stop"));
 149         m_stopButton->hide();
 150         connect(m_stopButton, SIGNAL(clicked()), this, SLOT(stop()));
 151
 152         m_seekSlider->setIconVisible(false);
 153
 154         // Creating an audio player or video player instance might take up to
 155         // 2 seconds when doing it the first time. To prevent that the user
 156         // interface gets noticable blocked, the creation is delayed until
 157         // the play button has been pressed (see PhononWidget::play()).
 158     }
 159 }
 160
 161 void PhononWidget::hideEvent(QHideEvent *event)
 162 {
 163     QWidget::hideEvent(event);
 164     if (!event->spontaneous()) {
 165         stop();
 166     }
 167 }
 168
 169 void PhononWidget::stateChanged(Phonon::State newstate)
 170 {
 171     setUpdatesEnabled(false);
 172     switch (newstate) {
 173     case Phonon::PlayingState:
 174     case Phonon::BufferingState:
 175         m_stopButton->show();
 176         m_playButton->hide();
 177         break;
 178     default:
 179         m_stopButton->hide();
 180         m_playButton->show();
 181         break;
 182     }
 183     setUpdatesEnabled(true);
 184 }
 185
 186 void PhononWidget::play()
 187 {
 188     switch (m_mode) {
 189     case Audio:
 190         if (m_audioMedia == 0) {
 191             m_audioMedia = Phonon::createPlayer(Phonon::MusicCategory, m_url);
 192             m_audioMedia->setParent(this);
 193         }
 194         m_media = m_audioMedia;
 195         m_media->setCurrentSource(m_url);
 196         break;
 197
 198     case Video:
 199         if (m_videoPlayer == 0) {
 200             m_videoPlayer = new EmbeddedVideoPlayer(Phonon::VideoCategory, this);
 201             m_topLayout->insertWidget(0, m_videoPlayer);
 202         }
 203         applyVideoSize();
 204         m_videoPlayer->show();
 205         m_videoPlayer->play(m_url);
 206         m_media = m_videoPlayer->mediaObject();
 207         break;
 208
 209     default:
 210         break;
 211     }
 212
 213     Q_ASSERT(m_media != 0);
 214     connect(m_media, SIGNAL(stateChanged(Phonon::State, Phonon::State)),
 215             this, SLOT(stateChanged(Phonon::State)));
 216     m_seekSlider->setMediaObject(m_media);
 217
 218     emit playingStarted();
 219 }
 220
 221 void PhononWidget::stop()
 222 {
 223     if (m_media != 0) {
 224         m_media->stop();
 225         disconnect(m_media, SIGNAL(stateChanged(Phonon::State, Phonon::State)),
 226                    this, SLOT(stateChanged(Phonon::State)));
 227         emit playingStopped();
 228
 229         m_stopButton->hide();
 230         m_playButton->show();
 231     }
 232
 233     if (m_videoPlayer != 0) {
 234         m_videoPlayer->hide();
 235     }
 236 }
 237
 238 void PhononWidget::applyVideoSize()
 239 {
 240     if ((m_videoPlayer != 0) && m_videoSize.isValid()) {
 241         m_videoPlayer->setSizeHint(m_videoSize);
 242     }
 243 }