modules/gui/qt4/components/interface_widgets.cpp

   1 /*****************************************************************************
   2  * interface_widgets.cpp : Custom widgets for the main interface
   3  ****************************************************************************
   4  * Copyright (C) 2006-2010 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Clément Stenac <zorglub@videolan.org>
   8  *          Jean-Baptiste Kempf <jb@videolan.org>
   9  *          Rafaël Carré <funman@videolanorg>
  10  *          Ilkka Ollakka <ileoo@videolan.org>
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * ( at your option ) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  25  *****************************************************************************/
  26
  27 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #include "components/interface_widgets.hpp"
  32 #include "dialogs_provider.hpp"
  33 #include "util/customwidgets.hpp"               // qtEventToVLCKey, QVLCStackedWidget
  34
  35 #include "menus.hpp"             /* Popup menu on bgWidget */
  36
  37 #include <vlc_vout.h>
  38
  39 #include <QLabel>
  40 #include <QToolButton>
  41 #include <QPalette>
  42 #include <QEvent>
  43 #include <QResizeEvent>
  44 #include <QDate>
  45 #include <QMenu>
  46 #include <QWidgetAction>
  47 #include <QDesktopWidget>
  48 #include <QPainter>
  49 #include <QTimer>
  50 #include <QSlider>
  51 #include <QBitmap>
  52
  53 #ifdef Q_WS_X11
  54 # include <X11/Xlib.h>
  55 # include <qx11info_x11.h>
  56 static void videoSync( void )
  57 {
  58     /* Make sure the X server has processed all requests.
  59      * This protects other threads using distinct connections from getting
  60      * the video widget window in an inconsistent states. */
  61     XSync( QX11Info::display(), False );
  62 }
  63 #else
  64 # define videoSync() (void)0
  65 #endif
  66
  67 #include <math.h>
  68 #include <assert.h>
  69
  70 class ReparentableWidget : public QWidget
  71 {
  72 private:
  73     VideoWidget *owner;
  74 public:
  75     ReparentableWidget( VideoWidget *owner ) : owner( owner )
  76     {}
  77 };
  78
  79 /**********************************************************************
  80  * Video Widget. A simple frame on which video is drawn
  81  * This class handles resize issues
  82  **********************************************************************/
  83
  84 VideoWidget::VideoWidget( intf_thread_t *_p_i )
  85     : QFrame( NULL )
  86       , p_intf( _p_i )
  87       , reparentable( NULL )
  88 {
  89     /* Set the policy to expand in both directions */
  90     // setSizePolicy( QSizePolicy::Expanding, QSizePolicy::Expanding );
  91
  92     layout = new QHBoxLayout( this );
  93     layout->setContentsMargins( 0, 0, 0, 0 );
  94     setLayout( layout );
  95 }
  96
  97 VideoWidget::~VideoWidget()
  98 {
  99     /* Ensure we are not leaking the video output. This would crash. */
 100     assert( reparentable == NULL );
 101 }
 102
 103 /**
 104  * Request the video to avoid the conflicts
 105  **/
 106 WId VideoWidget::request( int *pi_x, int *pi_y,
 107                           unsigned int *pi_width, unsigned int *pi_height,
 108                           bool b_keep_size )
 109 {
 110     msg_Dbg( p_intf, "Video was requested %i, %i", *pi_x, *pi_y );
 111
 112     if( reparentable != NULL )
 113     {
 114         msg_Dbg( p_intf, "embedded video already in use" );
 115         return NULL;
 116     }
 117     if( b_keep_size )
 118     {
 119         *pi_width  = size().width();
 120         *pi_height = size().height();
 121     }
 122
 123     /* The Qt4 UI needs a fixed a widget ("this"), so that the parent layout is
 124      * not messed up when we the video is reparented. Hence, we create an extra
 125      * reparentable widget, that will be within the VideoWidget in windowed
 126      * mode, and within the root window (NULL parent) in full-screen mode.
 127      */
 128     reparentable = new ReparentableWidget( this );
 129     reparentable->installEventFilter(this );
 130     QLayout *innerLayout = new QHBoxLayout( reparentable );
 131     innerLayout->setContentsMargins( 0, 0, 0, 0 );
 132
 133     /* The owner of the video window needs a stable handle (WinId). Reparenting
 134      * in Qt4-X11 changes the WinId of the widget, so we need to create another
 135      * dummy widget that stays within the reparentable widget. */
 136     QWidget *stable = new QWidget();
 137     QPalette plt = palette();
 138     plt.setColor( QPalette::Window, Qt::black );
 139     stable->setPalette( plt );
 140     stable->setAutoFillBackground(true);
 141     /* Indicates that the widget wants to draw directly onto the screen.
 142        Widgets with this attribute set do not participate in composition
 143        management */
 144     /* This is currently disabled on X11 as it does not seem to improve
 145      * performance, but causes the video widget to be transparent... */
 146 #ifndef Q_WS_X11
 147     stable->setAttribute( Qt::WA_PaintOnScreen, true );
 148 #endif
 149
 150     innerLayout->addWidget( stable );
 151
 152     layout->addWidget( reparentable );
 153
 154 #ifdef Q_WS_X11
 155     /* HACK: Only one X11 client can subscribe to mouse button press events.
 156      * VLC currently handles those in the video display.
 157      * Force Qt4 to unsubscribe from mouse press and release events. */
 158     Display *dpy = QX11Info::display();
 159     Window w = stable->winId();
 160     XWindowAttributes attr;
 161
 162     XGetWindowAttributes( dpy, w, &attr );
 163     attr.your_event_mask &= ~(ButtonPressMask|ButtonReleaseMask);
 164     XSelectInput( dpy, w, attr.your_event_mask );
 165 #endif
 166     videoSync();
 167 #ifndef NDEBUG
 168     msg_Dbg( p_intf, "embedded video ready (handle %p)",
 169              (void *)stable->winId() );
 170 #endif
 171     return stable->winId();
 172 }
 173
 174 /* Set the Widget to the correct Size */
 175 /* Function has to be called by the parent
 176    Parent has to care about resizing itself */
 177 void VideoWidget::SetSizing( unsigned int w, unsigned int h )
 178 {
 179     if (reparentable->windowState() & Qt::WindowFullScreen )
 180         return;
 181     if( !isVisible() ) show();
 182     resize( w, h );
 183     emit sizeChanged( w, h );
 184     /* Work-around a bug?misconception? that would happen when vout core resize
 185        twice to the same size and would make the vout not centered.
 186        This cause a small flicker.
 187        See #3621
 188      */
 189     if( size().width() == w && size().height() == h )
 190         updateGeometry();
 191     videoSync();
 192 }
 193
 194 void VideoWidget::SetFullScreen( bool b_fs, bool b_ontop )
 195 {
 196     const Qt::WindowStates curstate = reparentable->windowState();
 197     Qt::WindowStates newstate = curstate;
 198     Qt::WindowFlags  newflags = reparentable->windowFlags();
 199
 200
 201     if( b_fs )
 202     {
 203         newstate |= Qt::WindowFullScreen;
 204         if( b_ontop )
 205             newflags |= Qt::WindowStaysOnTopHint;
 206     }
 207     else
 208     {
 209         newstate &= ~Qt::WindowFullScreen;
 210         newflags &= ~Qt::WindowStaysOnTopHint;
 211     }
 212     if( newstate == curstate )
 213         return; /* no changes needed */
 214
 215     if( b_fs )
 216     {   /* Go full-screen */
 217         int numscreen = var_InheritInteger( p_intf, "qt-fullscreen-screennumber" );
 218         /* if user hasn't defined screennumber, or screennumber that is bigger
 219          * than current number of screens, take screennumber where current interface
 220          * is
 221          */
 222         if( numscreen == -1 || numscreen > QApplication::desktop()->numScreens() )
 223             numscreen = QApplication::desktop()->screenNumber( p_intf->p_sys->p_mi );
 224
 225         QRect screenres = QApplication::desktop()->screenGeometry( numscreen );
 226
 227         /* To be sure window is on proper-screen in xinerama */
 228         if( !screenres.contains( reparentable->pos() ) )
 229         {
 230             msg_Dbg( p_intf, "Moving video to correct screen");
 231             reparentable->move( QPoint( screenres.x(), screenres.y() ) );
 232         }
 233         reparentable->setParent( NULL, newflags );
 234         reparentable->setWindowState( newstate );
 235
 236         /* FIXME: inherit from the vout window, not the interface */
 237         char *title = var_InheritString( p_intf, "video-title" );
 238         reparentable->setWindowTitle( qfu(title ? title : _("Video")) );
 239         free( title );
 240
 241         reparentable->show();
 242     }
 243     else
 244     {   /* Go windowed */
 245         reparentable->setWindowFlags( newflags );
 246         reparentable->setWindowState( newstate );
 247         layout->addWidget( reparentable );
 248     }
 249     videoSync();
 250 }
 251
 252 void VideoWidget::release( void )
 253 {
 254     msg_Dbg( p_intf, "Video is not needed anymore" );
 255     //layout->removeWidget( reparentable );
 256
 257     reparentable->deleteLater();
 258     reparentable = NULL;
 259     updateGeometry();
 260     hide();
 261 }
 262
 263 #undef KeyPress
 264 bool VideoWidget::eventFilter(QObject *obj, QEvent *event)
 265 {
 266     if( obj == reparentable )
 267     {
 268         if (event->type() == QEvent::Close)
 269         {
 270             THEDP->quit();
 271             return true;
 272         }
 273         else if( event->type() == QEvent::KeyPress )
 274         {
 275             emit keyPressed( static_cast<QKeyEvent *>(event) );
 276             return true;
 277         }
 278         else if( event->type() == QEvent::Wheel )
 279         {
 280             int i_vlckey = qtWheelEventToVLCKey( static_cast<QWheelEvent *>(event) );
 281             var_SetInteger( p_intf->p_libvlc, "key-pressed", i_vlckey );
 282             return true;
 283         }
 284     }
 285     return false;
 286 }
 287
 288 /**********************************************************************
 289  * Background Widget. Show a simple image background. Currently,
 290  * it's album art if present or cone.
 291  **********************************************************************/
 292
 293 BackgroundWidget::BackgroundWidget( intf_thread_t *_p_i )
 294                  :QWidget( NULL ), p_intf( _p_i ), b_expandPixmap( false )
 295 {
 296     /* A dark background */
 297     setAutoFillBackground( true );
 298     QPalette plt = palette();
 299     plt.setColor( QPalette::Active, QPalette::Window , Qt::black );
 300     plt.setColor( QPalette::Inactive, QPalette::Window , Qt::black );
 301     setPalette( plt );
 302
 303     /* Init the cone art */
 304     updateArt( "" );
 305
 306     CONNECT( THEMIM->getIM(), artChanged( QString ),
 307              this, updateArt( const QString& ) );
 308 }
 309
 310 void BackgroundWidget::updateArt( const QString& url )
 311 {
 312     if ( !url.isEmpty() )
 313     {
 314         pixmapUrl = url;
 315     }
 316     else
 317     {   /* Xmas joke */
 318         if( QDate::currentDate().dayOfYear() >= 354 )
 319             pixmapUrl = QString( ":/logo/vlc128-christmas.png" );
 320         else
 321             pixmapUrl = QString( ":/logo/vlc128.png" );
 322     }
 323     update();
 324 }
 325
 326 void BackgroundWidget::paintEvent( QPaintEvent *e )
 327 {
 328     int i_maxwidth, i_maxheight;
 329     QPixmap pixmap = QPixmap( pixmapUrl );
 330     QPainter painter(this);
 331     QBitmap pMask;
 332     float f_alpha = 1.0;
 333
 334     i_maxwidth = std::min( maximumWidth(), width() ) - MARGIN * 2;
 335     i_maxheight = std::min( maximumHeight(), height() ) - MARGIN * 2;
 336
 337     if ( height() > MARGIN * 2 )
 338     {
 339         /* Scale down the pixmap if the widget is too small */
 340         if( pixmap.width() > i_maxwidth || pixmap.height() > i_maxheight )
 341         {
 342             pixmap = pixmap.scaled( i_maxwidth, i_maxheight,
 343                             Qt::KeepAspectRatio, Qt::SmoothTransformation );
 344         }
 345         else
 346         if ( b_expandPixmap &&
 347              pixmap.width() < width() && pixmap.height() < height() )
 348         {
 349             /* Scale up the pixmap to fill widget's size */
 350             f_alpha = ( (float) pixmap.height() / (float) height() );
 351             pixmap = pixmap.scaled(
 352                     width() - MARGIN * 2,
 353                     height() - MARGIN * 2,
 354                     Qt::KeepAspectRatio,
 355                     ( f_alpha < .2 )? /* Don't waste cpu when not visible */
 356                         Qt::SmoothTransformation:
 357                         Qt::FastTransformation
 358                     );
 359             /* Non agressive alpha compositing when sizing up */
 360             pMask = QBitmap( pixmap.width(), pixmap.height() );
 361             pMask.fill( QColor::fromRgbF( 1.0, 1.0, 1.0, f_alpha ) );
 362             pixmap.setMask( pMask );
 363         }
 364
 365         painter.drawPixmap(
 366                 MARGIN + ( i_maxwidth - pixmap.width() ) /2,
 367                 MARGIN + ( i_maxheight - pixmap.height() ) /2,
 368                 pixmap);
 369     }
 370     QWidget::paintEvent( e );
 371 }
 372
 373 void BackgroundWidget::contextMenuEvent( QContextMenuEvent *event )
 374 {
 375     QVLCMenu::PopupMenu( p_intf, true );
 376     event->accept();
 377 }
 378
 379 #if 0
 380 #include <QPushButton>
 381 #include <QHBoxLayout>
 382
 383 /**********************************************************************
 384  * Visualization selector panel
 385  **********************************************************************/
 386 VisualSelector::VisualSelector( intf_thread_t *_p_i ) :
 387                                 QFrame( NULL ), p_intf( _p_i )
 388 {
 389     QHBoxLayout *layout = new QHBoxLayout( this );
 390     layout->setMargin( 0 );
 391     QPushButton *prevButton = new QPushButton( "Prev" );
 392     QPushButton *nextButton = new QPushButton( "Next" );
 393     layout->addWidget( prevButton );
 394     layout->addWidget( nextButton );
 395
 396     layout->addStretch( 10 );
 397     layout->addWidget( new QLabel( qtr( "Current visualization" ) ) );
 398
 399     current = new QLabel( qtr( "None" ) );
 400     layout->addWidget( current );
 401
 402     BUTTONACT( prevButton, prev() );
 403     BUTTONACT( nextButton, next() );
 404
 405     setLayout( layout );
 406     setMaximumHeight( 35 );
 407 }
 408
 409 VisualSelector::~VisualSelector()
 410 {}
 411
 412 void VisualSelector::prev()
 413 {
 414     char *psz_new = aout_VisualPrev( p_intf );
 415     if( psz_new )
 416     {
 417         current->setText( qfu( psz_new ) );
 418         free( psz_new );
 419     }
 420 }
 421
 422 void VisualSelector::next()
 423 {
 424     char *psz_new = aout_VisualNext( p_intf );
 425     if( psz_new )
 426     {
 427         current->setText( qfu( psz_new ) );
 428         free( psz_new );
 429     }
 430 }
 431 #endif
 432
 433 SpeedLabel::SpeedLabel( intf_thread_t *_p_intf, QWidget *parent )
 434            : QLabel( parent ), p_intf( _p_intf )
 435 {
 436     tooltipStringPattern = qtr( "Current playback speed: %1\nClick to adjust" );
 437
 438     /* Create the Speed Control Widget */
 439     speedControl = new SpeedControlWidget( p_intf, this );
 440     speedControlMenu = new QMenu( this );
 441
 442     QWidgetAction *widgetAction = new QWidgetAction( speedControl );
 443     widgetAction->setDefaultWidget( speedControl );
 444     speedControlMenu->addAction( widgetAction );
 445
 446     /* Change the SpeedRate in the Status Bar */
 447     CONNECT( THEMIM->getIM(), rateChanged( float ), this, setRate( float ) );
 448
 449     DCONNECT( THEMIM, inputChanged( input_thread_t * ),
 450               speedControl, activateOnState() );
 451     setRate( var_InheritFloat( p_intf, "rate" ) );
 452 }
 453
 454 SpeedLabel::~SpeedLabel()
 455 {
 456     delete speedControl;
 457     delete speedControlMenu;
 458 }
 459
 460 /****************************************************************************
 461  * Small right-click menu for rate control
 462  ****************************************************************************/
 463
 464 void SpeedLabel::showSpeedMenu( QPoint pos )
 465 {
 466     speedControlMenu->exec( QCursor::pos() - pos
 467                           + QPoint( 0, height() ) );
 468 }
 469
 470 void SpeedLabel::setRate( float rate )
 471 {
 472     QString str;
 473     str.setNum( rate, 'f', 2 );
 474     str.append( "x" );
 475     setText( str );
 476     setToolTip( tooltipStringPattern.arg( str ) );
 477     speedControl->updateControls( rate );
 478 }
 479
 480 /**********************************************************************
 481  * Speed control widget
 482  **********************************************************************/
 483 SpeedControlWidget::SpeedControlWidget( intf_thread_t *_p_i, QWidget *_parent )
 484                     : QFrame( _parent ), p_intf( _p_i )
 485 {
 486     QSizePolicy sizePolicy( QSizePolicy::Maximum, QSizePolicy::Fixed );
 487     sizePolicy.setHorizontalStretch( 0 );
 488     sizePolicy.setVerticalStretch( 0 );
 489
 490     speedSlider = new QSlider( this );
 491     speedSlider->setSizePolicy( sizePolicy );
 492     speedSlider->setMaximumSize( QSize( 80, 200 ) );
 493     speedSlider->setOrientation( Qt::Vertical );
 494     speedSlider->setTickPosition( QSlider::TicksRight );
 495
 496     speedSlider->setRange( -34, 34 );
 497     speedSlider->setSingleStep( 1 );
 498     speedSlider->setPageStep( 1 );
 499     speedSlider->setTickInterval( 17 );
 500
 501     CONNECT( speedSlider, valueChanged( int ), this, updateRate( int ) );
 502
 503     QToolButton *normalSpeedButton = new QToolButton( this );
 504     normalSpeedButton->setMaximumSize( QSize( 26, 20 ) );
 505     normalSpeedButton->setAutoRaise( true );
 506     normalSpeedButton->setText( "1x" );
 507     normalSpeedButton->setToolTip( qtr( "Revert to normal play speed" ) );
 508
 509     CONNECT( normalSpeedButton, clicked(), this, resetRate() );
 510
 511     QVBoxLayout *speedControlLayout = new QVBoxLayout( this );
 512     speedControlLayout->setContentsMargins( 4, 4, 4, 4 );
 513     speedControlLayout->setSpacing( 4 );
 514     speedControlLayout->addWidget( speedSlider );
 515     speedControlLayout->addWidget( normalSpeedButton );
 516
 517     lastValue = 0;
 518
 519     activateOnState();
 520 }
 521
 522 void SpeedControlWidget::activateOnState()
 523 {
 524     speedSlider->setEnabled( THEMIM->getIM()->hasInput() );
 525 }
 526
 527 void SpeedControlWidget::updateControls( float rate )
 528 {
 529     if( speedSlider->isSliderDown() )
 530     {
 531         //We don't want to change anything if the user is using the slider
 532         return;
 533     }
 534
 535     double value = 17 * log( rate ) / log( 2 );
 536     int sliderValue = (int) ( ( value > 0 ) ? value + .5 : value - .5 );
 537
 538     if( sliderValue < speedSlider->minimum() )
 539     {
 540         sliderValue = speedSlider->minimum();
 541     }
 542     else if( sliderValue > speedSlider->maximum() )
 543     {
 544         sliderValue = speedSlider->maximum();
 545     }
 546     lastValue = sliderValue;
 547
 548     speedSlider->setValue( sliderValue );
 549 }
 550
 551 void SpeedControlWidget::updateRate( int sliderValue )
 552 {
 553     if( sliderValue == lastValue )
 554         return;
 555
 556     double speed = pow( 2, (double)sliderValue / 17 );
 557     int rate = INPUT_RATE_DEFAULT / speed;
 558
 559     THEMIM->getIM()->setRate(rate);
 560 }
 561
 562 void SpeedControlWidget::resetRate()
 563 {
 564     THEMIM->getIM()->setRate( INPUT_RATE_DEFAULT );
 565 }
 566
 567 CoverArtLabel::CoverArtLabel( QWidget *parent, intf_thread_t *_p_i )
 568               : QLabel( parent ), p_intf( _p_i )
 569 {
 570     setContextMenuPolicy( Qt::ActionsContextMenu );
 571     CONNECT( this, updateRequested(), this, askForUpdate() );
 572
 573     setMinimumHeight( 128 );
 574     setMinimumWidth( 128 );
 575     setMaximumHeight( 128 );
 576     setMaximumWidth( 128 );
 577     setScaledContents( false );
 578     setAlignment( Qt::AlignCenter );
 579
 580     QList< QAction* > artActions = actions();
 581     QAction *action = new QAction( qtr( "Download cover art" ), this );
 582     CONNECT( action, triggered(), this, askForUpdate() );
 583     addAction( action );
 584
 585     showArtUpdate( "" );
 586 }
 587
 588 CoverArtLabel::~CoverArtLabel()
 589 {
 590     QList< QAction* > artActions = actions();
 591     foreach( QAction *act, artActions )
 592         removeAction( act );
 593 }
 594
 595 void CoverArtLabel::showArtUpdate( const QString& url )
 596 {
 597     QPixmap pix;
 598     if( !url.isEmpty() && pix.load( url ) )
 599     {
 600         pix = pix.scaled( maximumWidth(), maximumHeight(),
 601                           Qt::KeepAspectRatioByExpanding,
 602                           Qt::SmoothTransformation );
 603     }
 604     else
 605     {
 606         pix = QPixmap( ":/noart.png" );
 607     }
 608     setPixmap( pix );
 609 }
 610
 611 void CoverArtLabel::askForUpdate()
 612 {
 613     THEMIM->getIM()->requestArtUpdate();
 614 }
 615
 616 TimeLabel::TimeLabel( intf_thread_t *_p_intf  )
 617     : QLabel(), p_intf( _p_intf ), bufTimer( new QTimer(this) ),
 618       buffering( false ), showBuffering(false), bufVal( -1 )
 619 {
 620     b_remainingTime = false;
 621     setText( " --:--/--:-- " );
 622     setAlignment( Qt::AlignRight | Qt::AlignVCenter );
 623     setToolTip( QString( "- " )
 624         + qtr( "Click to toggle between elapsed and remaining time" )
 625         + QString( "\n- " )
 626         + qtr( "Double click to jump to a chosen time position" ) );
 627     bufTimer->setSingleShot( true );
 628
 629     CONNECT( THEMIM->getIM(), positionUpdated( float, int64_t, int ),
 630               this, setDisplayPosition( float, int64_t, int ) );
 631     CONNECT( THEMIM->getIM(), cachingChanged( float ),
 632               this, updateBuffering( float ) );
 633     CONNECT( bufTimer, timeout(), this, updateBuffering() );
 634 }
 635
 636 void TimeLabel::setDisplayPosition( float pos, int64_t t, int length )
 637 {
 638     showBuffering = false;
 639     bufTimer->stop();
 640
 641     if( pos == -1.f )
 642     {
 643         setText( " --:--/--:-- " );
 644         return;
 645     }
 646
 647     int time = t / 1000000;
 648
 649     secstotimestr( psz_length, length );
 650     secstotimestr( psz_time, ( b_remainingTime && length ) ? length - time
 651                                                            : time );
 652
 653     QString timestr = QString( " %1%2/%3 " )
 654             .arg( QString( (b_remainingTime && length) ? "-" : "" ) )
 655             .arg( QString( psz_time ) )
 656             .arg( QString( ( !length && time ) ? "--:--" : psz_length ) );
 657
 658     setText( timestr );
 659
 660     cachedLength = length;
 661 }
 662
 663 void TimeLabel::setDisplayPosition( float pos )
 664 {
 665     if( pos == -1.f || cachedLength == 0 )
 666     {
 667         setText( " --:--/--:-- " );
 668         return;
 669     }
 670
 671     int time = pos * cachedLength;
 672     secstotimestr( psz_time,
 673                    ( b_remainingTime && cachedLength ?
 674                    cachedLength - time : time ) );
 675     QString timestr = QString( " %1%2/%3 " )
 676         .arg( QString( (b_remainingTime && cachedLength) ? "-" : "" ) )
 677         .arg( QString( psz_time ) )
 678         .arg( QString( ( !cachedLength && time ) ? "--:--" : psz_length ) );
 679
 680     setText( timestr );
 681 }
 682
 683
 684 void TimeLabel::toggleTimeDisplay()
 685 {
 686     b_remainingTime = !b_remainingTime;
 687 }
 688
 689
 690 void TimeLabel::updateBuffering( float _buffered )
 691 {
 692     bufVal = _buffered;
 693     if( !buffering || bufVal == 0 )
 694     {
 695         showBuffering = false;
 696         buffering = true;
 697         bufTimer->start(200);
 698     }
 699     else if( bufVal == 1 )
 700     {
 701         showBuffering = buffering = false;
 702         bufTimer->stop();
 703     }
 704     update();
 705 }
 706
 707 void TimeLabel::updateBuffering()
 708 {
 709     showBuffering = true;
 710     update();
 711 }
 712
 713 void TimeLabel::paintEvent( QPaintEvent* event )
 714 {
 715     if( showBuffering )
 716     {
 717         QRect r( rect() );
 718         r.setLeft( r.width() * bufVal );
 719         QPainter p( this );
 720         p.setOpacity( 0.4 );
 721         p.fillRect( r, palette().color( QPalette::Highlight ) );
 722     }
 723     QLabel::paintEvent( event );
 724 }