modules/gui/qt/util/input_slider.cpp

   1 /*****************************************************************************
   2  * input_slider.cpp : VolumeSlider and SeekSlider
   3  ****************************************************************************
   4  * Copyright (C) 2006-2011 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Clément Stenac <zorglub@videolan.org>
   8  *          Jean-Baptiste Kempf <jb@videolan.org>
   9  *          Ludovic Fauvet <etix@videolan.org>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  24  *****************************************************************************/
  25
  26 #ifdef HAVE_CONFIG_H
  27 # include "config.h"
  28 #endif
  29
  30 #include "qt.hpp"
  31
  32 #include "util/input_slider.hpp"
  33 #include "util/timetooltip.hpp"
  34 #include "adapters/seekpoints.hpp"
  35 #include "input_manager.hpp"
  36 #include "imagehelper.hpp"
  37
  38 #include <QPaintEvent>
  39 #include <QPainter>
  40 #include <QBitmap>
  41 #include <QStyleOptionSlider>
  42 #include <QLinearGradient>
  43 #include <QTimer>
  44 #include <QRadialGradient>
  45 #include <QLinearGradient>
  46 #include <QSize>
  47 #include <QPalette>
  48 #include <QColor>
  49 #include <QPoint>
  50 #include <QPropertyAnimation>
  51 #include <QApplication>
  52 #include <QDebug>
  53 #include <QScreen>
  54 #include <QSequentialAnimationGroup>
  55
  56 namespace {
  57     int const MIN_SLIDER_VALUE = 0;
  58     int const MAX_SLIDER_VALUE = 10000;
  59
  60     int const CHAPTER_SPOT_SIZE = 3;
  61
  62     int const FADE_DURATION = 300;
  63     int const FADEOUT_DELAY = 2000;
  64 }
  65
  66 SeekSlider::SeekSlider( Qt::Orientation q, QWidget *_parent, bool _static )
  67           : QSlider( q, _parent ), b_classic( _static ), animLoading( NULL )
  68 {
  69     isSliding = false;
  70     isJumping = false;
  71     f_buffering = 0.0;
  72     mHandleOpacity = 1.0;
  73     mLoading = 0.0;
  74     chapters = NULL;
  75     mHandleLength = -1;
  76     b_seekable = true;
  77     alternativeStyle = NULL;
  78
  79     // prepare some static colors
  80     QPalette p = palette();
  81     QColor background = p.color( QPalette::Active, QPalette::Window );
  82     tickpointForeground = p.color( QPalette::Active, QPalette::WindowText );
  83     tickpointForeground.setHsv( tickpointForeground.hue(),
  84             ( background.saturation() + tickpointForeground.saturation() ) / 2,
  85             ( background.value() + tickpointForeground.value() ) / 2 );
  86
  87     // set the background color and gradient
  88     QColor backgroundBase( p.window().color() );
  89     backgroundGradient.setColorAt( 0.0, backgroundBase.darker( 140 ) );
  90     backgroundGradient.setColorAt( 1.0, backgroundBase );
  91
  92     // set the foreground color and gradient
  93     QColor foregroundBase( 50, 156, 255 );
  94     foregroundGradient.setColorAt( 0.0,  foregroundBase );
  95     foregroundGradient.setColorAt( 1.0,  foregroundBase.darker( 140 ) );
  96
  97     // prepare the handle's gradient
  98     handleGradient.setColorAt( 0.0, p.window().color().lighter( 120 ) );
  99     handleGradient.setColorAt( 0.9, p.window().color().darker( 120 ) );
 100
 101     // prepare the handle's shadow gradient
 102     QColor shadowBase = p.shadow().color();
 103     if( shadowBase.lightness() > 100 )
 104         shadowBase = QColor( 60, 60, 60 ); // Palette's shadow is too bright
 105     shadowDark = shadowBase.darker( 150 );
 106     shadowLight = shadowBase.lighter( 180 );
 107     shadowLight.setAlpha( 50 );
 108
 109     /* Timer used to fire intermediate updatePos() when sliding */
 110     seekLimitTimer = new QTimer( this );
 111     seekLimitTimer->setSingleShot( true );
 112
 113     /* Tooltip bubble */
 114     mTimeTooltip = new TimeTooltip( NULL );
 115     mTimeTooltip->setMouseTracking( true );
 116
 117     /* Properties */
 118     setRange( MIN_SLIDER_VALUE, MAX_SLIDER_VALUE );
 119     setSingleStep( 2 );
 120     setPageStep( 10 );
 121     setMouseTracking( true );
 122     setTracking( true );
 123     setFocusPolicy( Qt::NoFocus );
 124
 125     /* Use the new/classic style */
 126     setMinimumHeight( 18 );
 127     if( !b_classic )
 128     {
 129         alternativeStyle = new SeekStyle;
 130         setStyle( alternativeStyle );
 131     }
 132
 133     /* Init to 0 */
 134     setPosition( -1.0, 0, 0 );
 135     secstotimestr( psz_length, 0 );
 136
 137     animHandle = new QPropertyAnimation( this, "handleOpacity", this );
 138     animHandle->setDuration( FADE_DURATION );
 139     animHandle->setStartValue( 0.0 );
 140     animHandle->setEndValue( 1.0 );
 141
 142     QPropertyAnimation *animLoadingIn = new QPropertyAnimation( this, "loadingProperty", this );
 143     animLoadingIn->setDuration( 2000 );
 144     animLoadingIn->setStartValue( 0.0 );
 145     animLoadingIn->setEndValue( 1.0 );
 146     animLoadingIn->setEasingCurve( QEasingCurve::OutBounce );
 147     QPropertyAnimation *animLoadingOut = new QPropertyAnimation( this, "loadingProperty", this );
 148     animLoadingOut->setDuration( 2000 );
 149     animLoadingOut->setStartValue( 1.0 );
 150     animLoadingOut->setEndValue( 0.0 );
 151     animLoadingOut->setEasingCurve( QEasingCurve::OutBounce );
 152
 153     animLoading = new QSequentialAnimationGroup( this );
 154     animLoading->addAnimation( animLoadingIn );
 155     animLoading->addAnimation( animLoadingOut );
 156     animLoading->setLoopCount( -1 );
 157
 158     hideHandleTimer = new QTimer( this );
 159     hideHandleTimer->setSingleShot( true );
 160     hideHandleTimer->setInterval( FADEOUT_DELAY );
 161
 162     startAnimLoadingTimer = new QTimer( this );
 163     startAnimLoadingTimer->setSingleShot( true );
 164     startAnimLoadingTimer->setInterval( 500 );
 165
 166     CONNECT( MainInputManager::getInstance(), inputChanged( bool ), this , inputUpdated( bool ) );
 167     CONNECT( this, sliderMoved( int ), this, startSeekTimer() );
 168     CONNECT( seekLimitTimer, timeout(), this, updatePos() );
 169     CONNECT( hideHandleTimer, timeout(), this, hideHandle() );
 170     CONNECT( startAnimLoadingTimer, timeout(), this, startAnimLoading() );
 171     mTimeTooltip->installEventFilter( this );
 172 }
 173
 174 SeekSlider::~SeekSlider()
 175 {
 176     delete chapters;
 177     if ( alternativeStyle )
 178         delete alternativeStyle;
 179     delete mTimeTooltip;
 180 }
 181
 182 /***
 183  * \brief Sets the chapters seekpoints adapter
 184  *
 185  * \params SeekPoints initilized with current intf thread
 186 ***/
 187 void SeekSlider::setChapters( SeekPoints *chapters_ )
 188 {
 189     delete chapters;
 190     chapters = chapters_;
 191     chapters->setParent( this );
 192 }
 193
 194 /***
 195  * \brief Main public method, superseeding setValue. Disabling the slider when neeeded
 196  *
 197  * \param pos Position, between 0 and 1. -1 disables the slider
 198  * \param time Elapsed time. Unused
 199  * \param legnth Duration time.
 200  ***/
 201 void SeekSlider::setPosition( float pos, int64_t time, int length )
 202 {
 203     VLC_UNUSED(time);
 204     if( pos == -1.0 )
 205     {
 206         setEnabled( false );
 207         mTimeTooltip->hide();
 208         isSliding = false;
 209     }
 210     else
 211         setEnabled( b_seekable );
 212
 213     if( !isSliding )
 214     {
 215         setValue( pos * static_cast<float>( maximum() ) );
 216         if ( animLoading != NULL && pos >= 0.0f && animLoading->state() != QAbstractAnimation::Stopped )
 217         {
 218             animLoading->stop();
 219             mLoading = 0.0f;
 220         }
 221
 222     }
 223
 224     inputLength = length;
 225 }
 226
 227 void SeekSlider::startSeekTimer()
 228 {
 229     /* Only fire one update, when sliding, every 150ms */
 230     if( isSliding && !seekLimitTimer->isActive() )
 231         seekLimitTimer->start( 150 );
 232 }
 233
 234 void SeekSlider::updatePos()
 235 {
 236     float f_pos = value() / static_cast<float>( maximum() );
 237     emit sliderDragged( f_pos ); /* Send new position to VLC's core */
 238 }
 239
 240 void SeekSlider::updateBuffering( float f_buffering_ )
 241 {
 242     if ( f_buffering_ < f_buffering )
 243         bufferingStart = QTime::currentTime();
 244     f_buffering = f_buffering_;
 245     if ( f_buffering > 0.0 || isEnabled() ) {
 246         animLoading->stop();
 247         startAnimLoadingTimer->stop();
 248         mLoading = 0.0;
 249     }
 250     repaint();
 251 }
 252
 253 void SeekSlider::inputUpdated( bool b_has_input )
 254 {
 255     if ( b_has_input == false ) {
 256         animLoading->stop();
 257         startAnimLoadingTimer->stop();
 258         mLoading = 0.0;
 259         repaint();
 260     }
 261     else if ( f_buffering == 0.0 && !isEnabled() )
 262         startAnimLoadingTimer->start();
 263 }
 264
 265 void SeekSlider::processReleasedButton()
 266 {
 267     if ( !isSliding && !isJumping ) return;
 268     isSliding = false;
 269     bool b_seekPending = seekLimitTimer->isActive();
 270     seekLimitTimer->stop(); /* We're not sliding anymore: only last seek on release */
 271     if ( isJumping )
 272     {
 273         isJumping = false;
 274         return;
 275     }
 276     if( b_seekPending && isEnabled() )
 277         updatePos();
 278 }
 279
 280 void SeekSlider::mouseReleaseEvent( QMouseEvent *event )
 281 {
 282     if ( event->button() != Qt::LeftButton && event->button() != Qt::MidButton )
 283     {
 284         QSlider::mouseReleaseEvent( event );
 285         return;
 286     }
 287     event->accept();
 288     processReleasedButton();
 289 }
 290
 291 void SeekSlider::mousePressEvent( QMouseEvent* event )
 292 {
 293     /* Right-click */
 294     if ( !isEnabled() ||
 295          ( event->button() != Qt::LeftButton && event->button() != Qt::MidButton )
 296        )
 297     {
 298         QSlider::mousePressEvent( event );
 299         return;
 300     }
 301
 302     isJumping = false;
 303     /* handle chapter clicks */
 304     int i_width = size().width();
 305     if ( chapters && inputLength && i_width)
 306     {
 307         if ( orientation() == Qt::Horizontal ) /* TODO: vertical */
 308         {
 309              /* only on chapters zone */
 310             if ( event->y() < CHAPTER_SPOT_SIZE ||
 311                  event->y() > ( size().height() - CHAPTER_SPOT_SIZE ) )
 312             {
 313                 QList<SeekPoint> points = chapters->getPoints();
 314                 int i_selected = -1;
 315                 bool b_startsnonzero = false; /* as we always starts at 1 */
 316                 if ( points.count() > 0 ) /* do we need an extra offset ? */
 317                     b_startsnonzero = ( points.at(0).time > 0 );
 318                 int i_min_diff = i_width + 1;
 319                 for( int i = 0 ; i < points.count() ; i++ )
 320                 {
 321                     int x = points.at(i).time / 1000000.0 / inputLength * i_width;
 322                     int diff_x = abs( x - event->x() );
 323                     if ( diff_x < i_min_diff )
 324                     {
 325                         i_min_diff = diff_x;
 326                         i_selected = i + ( ( b_startsnonzero )? 1 : 0 );
 327                     } else break;
 328                 }
 329                 if ( i_selected && i_min_diff < 4 ) // max 4px around mark
 330                 {
 331                     chapters->jumpTo( i_selected );
 332                     event->accept();
 333                     isJumping = true;
 334                     return;
 335                 }
 336             }
 337         }
 338     }
 339
 340     isSliding = true ;
 341
 342     setValue( getValueFromXPos( event->x() ) );
 343     emit sliderMoved( value() );
 344     event->accept();
 345 }
 346
 347 void SeekSlider::mouseMoveEvent( QMouseEvent *event )
 348 {
 349     if ( ! ( event->buttons() & ( Qt::LeftButton | Qt::MidButton ) ) )
 350     {
 351         /* Handle button release when mouserelease has been hijacked by popup */
 352         processReleasedButton();
 353     }
 354
 355     if ( !isEnabled() ) return event->accept();
 356
 357     if( isSliding )
 358     {
 359         setValue( getValueFromXPos( event->x() ) );
 360         emit sliderMoved( value() );
 361     }
 362
 363     /* Tooltip */
 364     if ( inputLength > 0 )
 365     {
 366         int margin = handleLength();
 367         int posX = qMax( rect().left() + margin, qMin( rect().right() - margin, event->x() ) );
 368
 369         QString chapterLabel;
 370
 371         if ( orientation() == Qt::Horizontal ) /* TODO: vertical */
 372         {
 373             QList<SeekPoint> points = chapters->getPoints();
 374             int i_selected = -1;
 375             for( int i = 0 ; i < points.count() ; i++ )
 376             {
 377                 int x = margin + points.at(i).time / 1000000.0 / inputLength * (size().width() - 2*margin);
 378                 if ( event->x() >= x )
 379                     i_selected = i;
 380             }
 381             if ( i_selected >= 0 && i_selected < points.size() )
 382             {
 383                 chapterLabel = points.at( i_selected ).name;
 384             }
 385         }
 386
 387         QPoint target( event->globalX() - ( event->x() - posX ),
 388                 QWidget::mapToGlobal( QPoint( 0, 0 ) ).y() );
 389         if( likely( size().width() > handleLength() ) ) {
 390             secstotimestr( psz_length, getValuePercentageFromXPos( event->x() ) * inputLength );
 391             mTimeTooltip->setTip( target, psz_length, chapterLabel );
 392         }
 393     }
 394     event->accept();
 395 }
 396
 397 void SeekSlider::wheelEvent( QWheelEvent *event )
 398 {
 399     /* Don't do anything if we are for somehow reason sliding */
 400     if( !isSliding && isEnabled() )
 401     {
 402         setValue( value() + event->delta() / 12 ); /* 12 = 8 * 15 / 10
 403          Since delta is in 1/8 of ° and mouse have steps of 15 °
 404          and that our slider is in 0.1% and we want one step to be a 1%
 405          increment of position */
 406         emit sliderDragged( value() / static_cast<float>( maximum() ) );
 407     }
 408     event->accept();
 409 }
 410
 411 void SeekSlider::enterEvent( QEvent * )
 412 {
 413     /* Cancel the fade-out timer */
 414     hideHandleTimer->stop();
 415     /* Only start the fade-in if needed */
 416     if( isEnabled() && animHandle->direction() != QAbstractAnimation::Forward )
 417     {
 418         /* If pause is called while not running Qt will complain */
 419         if( animHandle->state() == QAbstractAnimation::Running )
 420             animHandle->pause();
 421         animHandle->setDirection( QAbstractAnimation::Forward );
 422         animHandle->start();
 423     }
 424     /* Don't show the tooltip if the slider is disabled or a menu is open */
 425     if( isEnabled() && inputLength > 0 && !qApp->activePopupWidget() )
 426         mTimeTooltip->show();
 427 }
 428
 429 void SeekSlider::leaveEvent( QEvent * )
 430 {
 431     hideHandleTimer->start();
 432     /* Hide the tooltip
 433        - if the mouse leave the slider rect (Note: it can still be
 434          over the tooltip!)
 435        - if another window is on the way of the cursor */
 436     if( !rect().contains( mapFromGlobal( QCursor::pos() ) ) ||
 437       ( !isActiveWindow() && !mTimeTooltip->isActiveWindow() ) )
 438     {
 439         mTimeTooltip->hide();
 440     }
 441 }
 442
 443 void SeekSlider::paintEvent( QPaintEvent *ev )
 444 {
 445     if ( alternativeStyle )
 446     {
 447         SeekStyle::SeekStyleOption option;
 448         option.initFrom( this );
 449         if ( QTime::currentTime() > bufferingStart.addSecs( 1 ) )
 450             option.buffering = f_buffering;
 451         else
 452             option.buffering = 0.0;
 453         option.length = inputLength;
 454         option.animate = ( animHandle->state() == QAbstractAnimation::Running
 455                            || hideHandleTimer->isActive() );
 456         option.animationopacity = mHandleOpacity;
 457         option.animationloading = mLoading;
 458         option.sliderPosition = sliderPosition();
 459         option.sliderValue = value();
 460         option.maximum = maximum();
 461         option.minimum = minimum();
 462         if ( chapters ) foreach( const SeekPoint &point, chapters->getPoints() )
 463             option.points << point.time;
 464         QPainter painter( this );
 465         style()->drawComplexControl( QStyle::CC_Slider, &option, &painter, this );
 466     }
 467     else
 468         QSlider::paintEvent( ev );
 469 }
 470
 471 void SeekSlider::hideEvent( QHideEvent * )
 472 {
 473     mTimeTooltip->hide();
 474 }
 475
 476 bool SeekSlider::eventFilter( QObject *obj, QEvent *event )
 477 {
 478     if( obj == mTimeTooltip )
 479     {
 480         if( event->type() == QEvent::MouseMove )
 481         {
 482             QMouseEvent* mev = static_cast<QMouseEvent*>( event );
 483
 484             if( rect().contains( mapFromGlobal( mev->globalPos() ) ) )
 485                 return false;
 486         }
 487
 488         if( event->type() == QEvent::Leave ||
 489             event->type() == QEvent::MouseMove )
 490         {
 491             mTimeTooltip->hide();
 492         }
 493
 494         return false;
 495     }
 496
 497     return QSlider::eventFilter( obj, event );
 498 }
 499
 500 QSize SeekSlider::sizeHint() const
 501 {
 502     if ( b_classic )
 503         return QSlider::sizeHint();
 504     return ( orientation() == Qt::Horizontal ) ? QSize( 100, 18 )
 505                                                : QSize( 18, 100 );
 506 }
 507
 508 qreal SeekSlider::handleOpacity() const
 509 {
 510     return mHandleOpacity;
 511 }
 512
 513 qreal SeekSlider::loading() const
 514 {
 515     return mLoading;
 516 }
 517
 518 void SeekSlider::setHandleOpacity(qreal opacity)
 519 {
 520     mHandleOpacity = opacity;
 521     /* Request a new paintevent */
 522     update();
 523 }
 524
 525 void SeekSlider::setLoading(qreal loading)
 526 {
 527     mLoading = loading;
 528     /* Request a new paintevent */
 529     update();
 530 }
 531
 532 inline int SeekSlider::handleLength()
 533 {
 534     if ( mHandleLength > 0 )
 535         return mHandleLength;
 536
 537     /* Ask for the length of the handle to the underlying style */
 538     QStyleOptionSlider option;
 539     initStyleOption( &option );
 540     mHandleLength = style()->pixelMetric( QStyle::PM_SliderLength, &option );
 541     return mHandleLength;
 542 }
 543
 544 inline int SeekSlider::getValueFromXPos( int posX )
 545 {
 546     return QStyle::sliderValueFromPosition(
 547         minimum(), maximum(),
 548         posX    - handleLength() / 2,
 549         width() - handleLength(),
 550         false
 551     );
 552 }
 553
 554 inline float SeekSlider::getValuePercentageFromXPos( int posX )
 555 {
 556     return getValueFromXPos( posX ) / static_cast<float>( maximum() );
 557 }
 558
 559 void SeekSlider::hideHandle()
 560 {
 561     /* If pause is called while not running Qt will complain */
 562     if( animHandle->state() == QAbstractAnimation::Running )
 563         animHandle->pause();
 564     /* Play the animation backward */
 565     animHandle->setDirection( QAbstractAnimation::Backward );
 566     animHandle->start();
 567 }
 568
 569 void SeekSlider::startAnimLoading()
 570 {
 571     animLoading->start();
 572 }
 573
 574 /* This work is derived from Amarok's work under GPLv2+
 575     - Mark Kretschmann
 576     - Gábor Lehel
 577    */
 578 #define WLENGTH   85  // px
 579 #define WHEIGHT   26  // px
 580 #define PADDINGL  6   // px
 581 #define PADDINGR  6   // px
 582 #define SOUNDMIN  0   // %
 583
 584 SoundSlider::SoundSlider( QWidget *_parent, float _i_step,
 585                           char *psz_colors, int max )
 586                         : QAbstractSlider( _parent )
 587 {
 588     f_step = (float)(_i_step * 10000)
 589            / (float)((max - SOUNDMIN) * AOUT_VOLUME_DEFAULT);
 590     setRange( SOUNDMIN, max);
 591     setMouseTracking( true );
 592     isSliding = false;
 593     b_mouseOutside = true;
 594     b_isMuted = false;
 595
 596     setFixedSize( WLENGTH, WHEIGHT );
 597
 598     pixOutside = ImageHelper::loadSvgToPixmap(":/toolbar/volslide-outside.svg", width(), height() );
 599
 600     const QPixmap temp = ImageHelper::loadSvgToPixmap(":/toolbar/volslide-inside.svg", width(), height() );
 601     const QBitmap mask( temp.createHeuristicMask() );
 602
 603     pixGradient = QPixmap( pixOutside.size() );
 604     pixGradient2 = QPixmap( pixOutside.size() );
 605 #if HAS_QT56
 606     pixGradient.setDevicePixelRatio(QApplication::primaryScreen()->devicePixelRatio());
 607     pixGradient2.setDevicePixelRatio(QApplication::primaryScreen()->devicePixelRatio());
 608 #endif
 609
 610     /* Gradient building from the preferences */
 611     QLinearGradient gradient( PADDINGL, 2, width() - PADDINGR, 2 );
 612     QLinearGradient gradient2( PADDINGL, 2, width()- PADDINGR, 2 );
 613
 614     QStringList colorList = qfu( psz_colors ).split( ";" );
 615     free( psz_colors );
 616
 617     /* Fill with 255 if the list is too short */
 618     if( colorList.count() < 12 )
 619         for( int i = colorList.count(); i < 12; i++)
 620             colorList.append( "255" );
 621
 622     background = palette().color( QPalette::Active, QPalette::Window );
 623     foreground = palette().color( QPalette::Active, QPalette::WindowText );
 624     foreground.setHsv( foreground.hue(),
 625                     ( background.saturation() + foreground.saturation() ) / 2,
 626                     ( background.value() + foreground.value() ) / 2 );
 627
 628     textfont.setPointSize( 7 );
 629     textrect.setRect( 0, 0, 34, 15 );
 630
 631     /* Regular colors */
 632 #define c(i) colorList.at(i).toInt()
 633 #define add_color(gradient, range, c1, c2, c3) \
 634     gradient.setColorAt( range, QColor( c(c1), c(c2), c(c3) ) );
 635
 636     /* Desaturated colors */
 637 #define desaturate(c) c->setHsvF( c->hueF(), 0.2 , 0.5, 1.0 )
 638 #define add_desaturated_color(gradient, range, c1, c2, c3) \
 639     foo = new QColor( c(c1), c(c2), c(c3) );\
 640     desaturate( foo ); gradient.setColorAt( range, *foo );\
 641     delete foo;
 642
 643     /* combine the two helpers */
 644 #define add_colors( gradient1, gradient2, range, c1, c2, c3 )\
 645     add_color( gradient1, range, c1, c2, c3 ); \
 646     add_desaturated_color( gradient2, range, c1, c2, c3 );
 647
 648     float f_mid_point = ( 100.0 / maximum() );
 649     QColor * foo;
 650     add_colors( gradient, gradient2, 0.0, 0, 1, 2 );
 651     add_colors( gradient, gradient2, f_mid_point - 0.05, 3, 4, 5 );
 652     add_colors( gradient, gradient2, f_mid_point + 0.05, 6, 7, 8 );
 653     add_colors( gradient, gradient2, 1.0, 9, 10, 11 );
 654
 655     painter.begin( &pixGradient );
 656     painter.setPen( Qt::NoPen );
 657     painter.setBrush( gradient );
 658     painter.drawRect( pixGradient.rect() );
 659     painter.end();
 660
 661     painter.begin( &pixGradient2 );
 662     painter.setPen( Qt::NoPen );
 663     painter.setBrush( gradient2 );
 664     painter.drawRect( pixGradient2.rect() );
 665     painter.end();
 666
 667     pixGradient.setMask( mask );
 668     pixGradient2.setMask( mask );
 669 }
 670
 671 void SoundSlider::wheelEvent( QWheelEvent *event )
 672 {
 673     int newvalue = value() + event->delta() / ( 8 * 15 ) * f_step;
 674     setValue( __MIN( __MAX( minimum(), newvalue ), maximum() ) );
 675
 676     emit sliderReleased();
 677     emit sliderMoved( value() );
 678 }
 679
 680 void SoundSlider::mousePressEvent( QMouseEvent *event )
 681 {
 682     if( event->button() != Qt::RightButton )
 683     {
 684         /* We enter the sliding mode */
 685         isSliding = true;
 686         i_oldvalue = value();
 687         emit sliderPressed();
 688         changeValue( event->x() );
 689         emit sliderMoved( value() );
 690     }
 691 }
 692
 693 void SoundSlider::processReleasedButton()
 694 {
 695     if( !b_mouseOutside && value() != i_oldvalue )
 696     {
 697         emit sliderReleased();
 698         setValue( value() );
 699         emit sliderMoved( value() );
 700     }
 701     isSliding = false;
 702     b_mouseOutside = false;
 703 }
 704
 705 void SoundSlider::mouseReleaseEvent( QMouseEvent *event )
 706 {
 707     if( event->button() != Qt::RightButton )
 708         processReleasedButton();
 709 }
 710
 711 void SoundSlider::mouseMoveEvent( QMouseEvent *event )
 712 {
 713     /* handle mouserelease hijacking */
 714     if ( isSliding && ( event->buttons() & ~Qt::RightButton ) == Qt::NoButton )
 715         processReleasedButton();
 716
 717     if( isSliding )
 718     {
 719         QRect rect( PADDINGL - 15,    -1,
 720                     width() - PADDINGR + 15 * 2 , width() + 5 );
 721         if( !rect.contains( event->pos() ) )
 722         { /* We are outside */
 723             if ( !b_mouseOutside )
 724                 setValue( i_oldvalue );
 725             b_mouseOutside = true;
 726         }
 727         else
 728         { /* We are inside */
 729             b_mouseOutside = false;
 730             changeValue( event->x() );
 731             emit sliderMoved( value() );
 732         }
 733     }
 734     else
 735     {
 736         int i = ( ( event->x() - PADDINGL ) * maximum() ) / ( width() - ( PADDINGR + PADDINGL ) );
 737         i = __MIN( __MAX( 0, i ), maximum() );
 738         setToolTip( QString("%1  %" ).arg( i ) );
 739     }
 740 }
 741
 742 void SoundSlider::changeValue( int x )
 743 {
 744     setValue( ( ( x - PADDINGL ) * maximum() ) / ( width() - ( PADDINGR + PADDINGL ) ) );
 745 }
 746
 747 void SoundSlider::setMuted( bool m )
 748 {
 749     b_isMuted = m;
 750     update();
 751 }
 752
 753 void SoundSlider::paintEvent( QPaintEvent *e )
 754 {
 755     QPixmap *paintGradient;
 756     if (b_isMuted)
 757         paintGradient = &this->pixGradient2;
 758     else
 759         paintGradient = &this->pixGradient;
 760
 761     painter.begin( this );
 762
 763     float f_scale = paintGradient->width() / float( width() );
 764     const int offsetDst = int( ( ( width() - ( PADDINGR + PADDINGL ) ) * value() + 100 ) / maximum() ) + PADDINGL;
 765     const int offsetSrc = int( ( ( paintGradient->width() - ( PADDINGR + PADDINGL ) * f_scale ) * value() + 100 ) / maximum() + PADDINGL * f_scale );
 766
 767     painter.drawPixmap( 0, 0, offsetDst, height(), *paintGradient, 0, 0, offsetSrc, paintGradient->height() );
 768     painter.drawPixmap( 0, 0, width(), height(), pixOutside, 0, 0,  pixOutside.width(), pixOutside.height() );
 769
 770     painter.setPen( foreground );
 771     painter.setFont( textfont );
 772     painter.drawText( textrect, Qt::AlignRight | Qt::AlignVCenter,
 773                       QString::number( value() ) + '%' );
 774
 775     painter.end();
 776     e->accept();
 777 }