modules/gui/qt4/components/playlist/standardpanel.cpp

   1 /*****************************************************************************
   2  * standardpanel.cpp : The "standard" playlist panel : just a treeview
   3  ****************************************************************************
   4  * Copyright (C) 2000-2009 VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Clément Stenac <zorglub@videolan.org>
   8  *          JB Kempf <jb@videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 #ifdef HAVE_CONFIG_H
  26 # include "config.h"
  27 #endif
  28
  29 #include "dialogs_provider.hpp"
  30
  31 #include "components/playlist/playlist_model.hpp"
  32 #include "components/playlist/standardpanel.hpp"
  33 #include "components/playlist/icon_view.hpp"
  34 #include "util/customwidgets.hpp"
  35 #include "menus.hpp"
  36
  37 #include <vlc_intf_strings.h>
  38
  39 #include <QPushButton>
  40 #include <QHeaderView>
  41 #include <QKeyEvent>
  42 #include <QModelIndexList>
  43 #include <QLabel>
  44 #include <QMenu>
  45 #include <QSignalMapper>
  46 #include <QWheelEvent>
  47 #include <QToolButton>
  48 #include <QFontMetrics>
  49 #include <QPainter>
  50
  51 #include <assert.h>
  52
  53 #include "sorting.h"
  54
  55 static const QString viewNames[] = { qtr( "Detailed View" ),
  56                                      qtr( "Icon View" ),
  57                                      qtr( "List View" ) };
  58
  59 StandardPLPanel::StandardPLPanel( PlaylistWidget *_parent,
  60                                   intf_thread_t *_p_intf,
  61                                   playlist_t *p_playlist,
  62                                   playlist_item_t *p_root ):
  63                                   QWidget( _parent ), p_intf( _p_intf )
  64 {
  65     layout = new QGridLayout( this );
  66     layout->setSpacing( 0 ); layout->setMargin( 0 );
  67     setMinimumWidth( 300 );
  68
  69     iconView = NULL;
  70     treeView = NULL;
  71     listView = NULL;
  72
  73     model = new PLModel( p_playlist, p_intf, p_root, this );
  74     currentRootId = -1;
  75     currentRootIndexId = -1;
  76     lastActivatedId = -1;
  77
  78     locationBar = new LocationBar( model );
  79     locationBar->setSizePolicy( QSizePolicy::Maximum, QSizePolicy::Preferred );
  80     layout->addWidget( locationBar, 0, 1 );
  81     layout->setColumnStretch( 1, 100 );
  82     CONNECT( locationBar, invoked( const QModelIndex & ),
  83              this, browseInto( const QModelIndex & ) );
  84
  85     layout->setColumnStretch( 2, 1 );
  86
  87     searchEdit = new SearchLineEdit( this );
  88     searchEdit->setMaximumWidth( 250 );
  89     searchEdit->setMinimumWidth( 80 );
  90     layout->addWidget( searchEdit, 0, 3 );
  91     CONNECT( searchEdit, textChanged( const QString& ),
  92              this, search( const QString& ) );
  93     layout->setColumnStretch( 3, 50 );
  94
  95     /* Add item to the playlist button */
  96     addButton = new QToolButton;
  97     addButton->setIcon( QIcon( ":/buttons/playlist/playlist_add" ) );
  98     addButton->setMaximumWidth( 30 );
  99     BUTTONACT( addButton, popupAdd() );
 100     layout->addWidget( addButton, 0, 0 );
 101
 102     /* Button to switch views */
 103     QToolButton *viewButton = new QToolButton( this );
 104     viewButton->setIcon( style()->standardIcon( QStyle::SP_FileDialogDetailedView ) );
 105     layout->addWidget( viewButton, 0, 4 );
 106
 107     /* View selection menu */
 108     viewSelectionMapper = new QSignalMapper( this );
 109     CONNECT( viewSelectionMapper, mapped( int ), this, showView( int ) );
 110
 111     QActionGroup *actionGroup = new QActionGroup( this );
 112
 113     for( int i = 0; i < VIEW_COUNT; i++ )
 114     {
 115         viewActions[i] = actionGroup->addAction( viewNames[i] );
 116         viewActions[i]->setCheckable( true );
 117         viewSelectionMapper->setMapping( viewActions[i], i );
 118         CONNECT( viewActions[i], triggered(), viewSelectionMapper, map() );
 119     }
 120
 121     BUTTONACT( viewButton, cycleViews() );
 122     QMenu *viewMenu = new QMenu( this );
 123     viewMenu->addActions( actionGroup->actions() );
 124
 125     viewButton->setMenu( viewMenu );
 126
 127     /* Saved Settings */
 128     getSettings()->beginGroup("Playlist");
 129
 130     int i_viewMode = getSettings()->value( "view-mode", TREE_VIEW ).toInt();
 131     showView( i_viewMode );
 132
 133     getSettings()->endGroup();
 134
 135     CONNECT( THEMIM, leafBecameParent( input_item_t *),
 136              this, browseInto( input_item_t * ) );
 137
 138     CONNECT( model, currentChanged( const QModelIndex& ),
 139              this, handleExpansion( const QModelIndex& ) );
 140     CONNECT( model, rootChanged(), this, handleRootChange() );
 141 }
 142
 143 StandardPLPanel::~StandardPLPanel()
 144 {
 145     getSettings()->beginGroup("Playlist");
 146     if( treeView )
 147         getSettings()->setValue( "headerStateV2", treeView->header()->saveState() );
 148     if( currentView == treeView )
 149         getSettings()->setValue( "view-mode", TREE_VIEW );
 150     else if( currentView == listView )
 151         getSettings()->setValue( "view-mode", LIST_VIEW );
 152     else if( currentView == iconView )
 153         getSettings()->setValue( "view-mode", ICON_VIEW );
 154     getSettings()->endGroup();
 155 }
 156
 157 /* Unused anymore, but might be useful, like in right-click menu */
 158 void StandardPLPanel::gotoPlayingItem()
 159 {
 160     currentView->scrollTo( model->currentIndex() );
 161 }
 162
 163 void StandardPLPanel::handleExpansion( const QModelIndex& index )
 164 {
 165     assert( currentView );
 166     currentView->scrollTo( index );
 167 }
 168
 169 void StandardPLPanel::handleRootChange()
 170 {
 171     /* needed for popupAdd() */
 172     PLItem *root = model->getItem( QModelIndex() );
 173     currentRootId = root->id();
 174
 175     browseInto();
 176
 177     /* enable/disable adding */
 178     if( currentRootId == THEPL->p_playing->i_id )
 179     {
 180         addButton->setEnabled( true );
 181         addButton->setToolTip( qtr(I_PL_ADDPL) );
 182     }
 183     else if( THEPL->p_media_library &&
 184              currentRootId == THEPL->p_media_library->i_id )
 185     {
 186         addButton->setEnabled( true );
 187         addButton->setToolTip( qtr(I_PL_ADDML) );
 188     }
 189     else
 190         addButton->setEnabled( false );
 191 }
 192
 193 /* PopupAdd Menu for the Add Menu */
 194 void StandardPLPanel::popupAdd()
 195 {
 196     QMenu popup;
 197     if( currentRootId == THEPL->p_playing->i_id )
 198     {
 199         popup.addAction( qtr(I_PL_ADDF), THEDP, SLOT( simplePLAppendDialog()) );
 200         popup.addAction( qtr(I_PL_ADDDIR), THEDP, SLOT( PLAppendDir()) );
 201         popup.addAction( qtr(I_OP_ADVOP), THEDP, SLOT( PLAppendDialog()) );
 202     }
 203     else if( THEPL->p_media_library &&
 204                 currentRootId == THEPL->p_media_library->i_id )
 205     {
 206         popup.addAction( qtr(I_PL_ADDF), THEDP, SLOT( simpleMLAppendDialog()) );
 207         popup.addAction( qtr(I_PL_ADDDIR), THEDP, SLOT( MLAppendDir() ) );
 208         popup.addAction( qtr(I_OP_ADVOP), THEDP, SLOT( MLAppendDialog() ) );
 209     }
 210
 211     popup.exec( QCursor::pos() - addButton->mapFromGlobal( QCursor::pos() )
 212                         + QPoint( 0, addButton->height() ) );
 213 }
 214
 215 void StandardPLPanel::popupPlView( const QPoint &point )
 216 {
 217     QModelIndex index = currentView->indexAt( point );
 218     QPoint globalPoint = currentView->viewport()->mapToGlobal( point );
 219     if( !index.isValid() ){
 220         QVLCMenu::PopupMenu( p_intf, true );
 221     }
 222     else
 223     {
 224         QItemSelectionModel *selection = currentView->selectionModel();
 225         QModelIndexList list = selection->selectedIndexes();
 226         model->popup( index, globalPoint, list );
 227     }
 228 }
 229
 230 void StandardPLPanel::popupSelectColumn( QPoint pos )
 231 {
 232     QMenu menu;
 233     assert( treeView );
 234
 235     /* We do not offer the option to hide index 0 column, or
 236     * QTreeView will behave weird */
 237     int i, j;
 238     for( i = 1 << 1, j = 1; i < COLUMN_END; i <<= 1, j++ )
 239     {
 240         QAction* option = menu.addAction(
 241             qfu( psz_column_title( i ) ) );
 242         option->setCheckable( true );
 243         option->setChecked( !treeView->isColumnHidden( j ) );
 244         selectColumnsSigMapper->setMapping( option, j );
 245         CONNECT( option, triggered(), selectColumnsSigMapper, map() );
 246     }
 247     menu.exec( QCursor::pos() );
 248 }
 249
 250 void StandardPLPanel::toggleColumnShown( int i )
 251 {
 252     treeView->setColumnHidden( i, !treeView->isColumnHidden( i ) );
 253 }
 254
 255 /* Search in the playlist */
 256 void StandardPLPanel::search( const QString& searchText )
 257 {
 258     bool flat = currentView == iconView || currentView == listView;
 259     model->search( searchText,
 260                    flat ? currentView->rootIndex() : QModelIndex(),
 261                    !flat );
 262 }
 263
 264 /* Set the root of the new Playlist */
 265 /* This activated by the selector selection */
 266 void StandardPLPanel::setRoot( playlist_item_t *p_item )
 267 {
 268     model->rebuild( p_item );
 269 }
 270
 271 void StandardPLPanel::browseInto( const QModelIndex &index )
 272 {
 273     if( currentView == iconView || currentView == listView )
 274     {
 275         currentRootIndexId = model->itemId( index );;
 276         currentView->setRootIndex( index );
 277     }
 278
 279     locationBar->setIndex( index );
 280     model->search( QString(), index, false );
 281     searchEdit->clear();
 282 }
 283
 284 void StandardPLPanel::browseInto( )
 285 {
 286     browseInto( currentRootIndexId != -1 && currentView != treeView ?
 287                 model->index( currentRootIndexId, 0 ) :
 288                 QModelIndex() );
 289 }
 290
 291 void StandardPLPanel::wheelEvent( QWheelEvent *e )
 292 {
 293     // Accept this event in order to prevent unwanted volume up/down changes
 294     e->accept();
 295 }
 296
 297 bool StandardPLPanel::eventFilter ( QObject * watched, QEvent * event )
 298 {
 299     if (event->type() == QEvent::KeyPress)
 300     {
 301         QKeyEvent *keyEvent = static_cast<QKeyEvent*>(event);
 302         if( keyEvent->key() == Qt::Key_Delete ||
 303             keyEvent->key() == Qt::Key_Back )
 304         {
 305             deleteSelection();
 306             return true;
 307         }
 308     }
 309     return false;
 310 }
 311
 312 void StandardPLPanel::deleteSelection()
 313 {
 314     QItemSelectionModel *selection = currentView->selectionModel();
 315     QModelIndexList list = selection->selectedIndexes();
 316     model->doDelete( list );
 317 }
 318
 319 void StandardPLPanel::createIconView()
 320 {
 321     iconView = new PlIconView( model, this );
 322     iconView->setContextMenuPolicy( Qt::CustomContextMenu );
 323     CONNECT( iconView, customContextMenuRequested( const QPoint & ),
 324              this, popupPlView( const QPoint & ) );
 325     CONNECT( iconView, activated( const QModelIndex & ),
 326              this, activate( const QModelIndex & ) );
 327     iconView->installEventFilter( this );
 328     layout->addWidget( iconView, 1, 0, 1, -1 );
 329 }
 330
 331 void StandardPLPanel::createListView()
 332 {
 333     listView = new PlListView( model, this );
 334     listView->setContextMenuPolicy( Qt::CustomContextMenu );
 335     CONNECT( listView, customContextMenuRequested( const QPoint & ),
 336              this, popupPlView( const QPoint & ) );
 337     CONNECT( listView, activated( const QModelIndex & ),
 338              this, activate( const QModelIndex & ) );
 339     listView->installEventFilter( this );
 340     layout->addWidget( listView, 1, 0, 1, -1 );
 341 }
 342
 343
 344 void StandardPLPanel::createTreeView()
 345 {
 346     /* Create and configure the QTreeView */
 347     treeView = new QTreeView;
 348
 349     treeView->setIconSize( QSize( 20, 20 ) );
 350     treeView->setAlternatingRowColors( true );
 351     treeView->setAnimated( true );
 352     treeView->setUniformRowHeights( true );
 353     treeView->setSortingEnabled( true );
 354     treeView->header()->setSortIndicator( -1 , Qt::AscendingOrder );
 355     treeView->header()->setSortIndicatorShown( true );
 356     treeView->header()->setClickable( true );
 357     treeView->header()->setContextMenuPolicy( Qt::CustomContextMenu );
 358
 359     treeView->setSelectionBehavior( QAbstractItemView::SelectRows );
 360     treeView->setSelectionMode( QAbstractItemView::ExtendedSelection );
 361     treeView->setDragEnabled( true );
 362     treeView->setAcceptDrops( true );
 363     treeView->setDropIndicatorShown( true );
 364     treeView->setContextMenuPolicy( Qt::CustomContextMenu );
 365
 366     /* setModel after setSortingEnabled(true), or the model will sort immediately! */
 367     treeView->setModel( model );
 368
 369     if( getSettings()->contains( "headerStateV2" ) )
 370     {
 371         treeView->header()->restoreState(
 372                 getSettings()->value( "headerStateV2" ).toByteArray() );
 373     }
 374     else
 375     {
 376         for( int m = 1, c = 0; m != COLUMN_END; m <<= 1, c++ )
 377         {
 378             treeView->setColumnHidden( c, !( m & COLUMN_DEFAULT ) );
 379             if( m == COLUMN_TITLE ) treeView->header()->resizeSection( c, 200 );
 380             else if( m == COLUMN_DURATION ) treeView->header()->resizeSection( c, 80 );
 381         }
 382     }
 383
 384     /* Connections for the TreeView */
 385     CONNECT( treeView, activated( const QModelIndex& ),
 386              this, activate( const QModelIndex& ) );
 387     CONNECT( treeView->header(), customContextMenuRequested( const QPoint & ),
 388              this, popupSelectColumn( QPoint ) );
 389     CONNECT( treeView, customContextMenuRequested( const QPoint & ),
 390              this, popupPlView( const QPoint & ) );
 391     treeView->installEventFilter( this );
 392
 393     /* SignalMapper for columns */
 394     selectColumnsSigMapper = new QSignalMapper( this );
 395     CONNECT( selectColumnsSigMapper, mapped( int ),
 396              this, toggleColumnShown( int ) );
 397
 398     /* Finish the layout */
 399     layout->addWidget( treeView, 1, 0, 1, -1 );
 400 }
 401
 402 void StandardPLPanel::showView( int i_view )
 403 {
 404     switch( i_view )
 405     {
 406     case TREE_VIEW:
 407     {
 408         if( treeView == NULL )
 409             createTreeView();
 410         if( iconView ) iconView->hide();
 411         if( listView ) listView->hide();
 412         treeView->show();
 413         currentView = treeView;
 414         viewActions[i_view]->setChecked( true );
 415         break;
 416     }
 417     case ICON_VIEW:
 418     {
 419         if( iconView == NULL )
 420             createIconView();
 421
 422         if( treeView ) treeView->hide();
 423         if( listView ) listView->hide();
 424         iconView->show();
 425         currentView = iconView;
 426         viewActions[i_view]->setChecked( true );
 427         break;
 428     }
 429     case LIST_VIEW:
 430     {
 431         if( listView == NULL )
 432             createListView();
 433
 434         if( treeView ) treeView->hide();
 435         if( iconView ) iconView->hide();
 436         listView->show();
 437         currentView = listView;
 438         viewActions[i_view]->setChecked( true );
 439         break;
 440     }
 441     default: return;
 442     }
 443
 444     browseInto();
 445 }
 446
 447 void StandardPLPanel::cycleViews()
 448 {
 449     if( currentView == iconView )
 450         showView( TREE_VIEW );
 451     else if( currentView == treeView )
 452         showView( LIST_VIEW );
 453     else if( currentView == listView )
 454         showView( ICON_VIEW );
 455     else
 456         assert( 0 );
 457 }
 458
 459 void StandardPLPanel::activate( const QModelIndex &index )
 460 {
 461     if( model->hasChildren( index ) )
 462     {
 463         if( currentView != treeView )
 464             browseInto( index );
 465     }
 466     else
 467     {
 468         playlist_Lock( THEPL );
 469         playlist_item_t *p_item = playlist_ItemGetById( THEPL, model->itemId( index ) );
 470         p_item->i_flags |= PLAYLIST_SUBITEM_STOP_FLAG;
 471         lastActivatedId = p_item->p_input->i_id;
 472         playlist_Unlock( THEPL );
 473         model->activateItem( index );
 474     }
 475 }
 476
 477 void StandardPLPanel::browseInto( input_item_t *p_input )
 478 {
 479
 480     if( p_input->i_id != lastActivatedId ) return;
 481
 482     playlist_Lock( THEPL );
 483
 484     playlist_item_t *p_item = playlist_ItemGetByInput( THEPL, p_input );
 485     if( !p_item )
 486     {
 487         playlist_Unlock( THEPL );
 488         return;
 489     }
 490
 491     QModelIndex index = model->index( p_item->i_id, 0 );
 492
 493     playlist_Unlock( THEPL );
 494
 495     if( currentView == treeView )
 496         treeView->setExpanded( index, true );
 497     else
 498         browseInto( index );
 499
 500     lastActivatedId = -1;
 501
 502
 503 }
 504
 505 LocationBar::LocationBar( PLModel *m )
 506 {
 507     model = m;
 508     mapper = new QSignalMapper( this );
 509     CONNECT( mapper, mapped( int ), this, invoke( int ) );
 510
 511     box = new QHBoxLayout;
 512     box->setSpacing( 0 );
 513     box->setContentsMargins( 0, 0, 0, 0 );
 514     setLayout( box );
 515 }
 516
 517 void LocationBar::setIndex( const QModelIndex &index )
 518 {
 519     qDeleteAll( buttons );
 520     buttons.clear();
 521     QModelIndex i = index;
 522     bool bold = true;
 523     while( true )
 524     {
 525         PLItem *item = model->getItem( i );
 526
 527         char *fb_name = input_item_GetTitleFbName( item->inputItem() );
 528         QString text = qfu(fb_name);
 529         free(fb_name);
 530         QAbstractButton *btn = new LocationButton( text, bold, i.isValid() );
 531         btn->setSizePolicy( QSizePolicy::Maximum, QSizePolicy::Fixed );
 532         box->insertWidget( 0, btn, bold ? 1 : 0 );
 533         buttons.append( btn );
 534
 535         mapper->setMapping( btn, item->id() );
 536         CONNECT( btn, clicked( ), mapper, map( ) );
 537
 538         bold = false;
 539
 540         if( i.isValid() ) i = i.parent();
 541         else break;
 542     }
 543 }
 544
 545 void LocationBar::setRootIndex()
 546 {
 547     setIndex( QModelIndex() );
 548 }
 549
 550 void LocationBar::invoke( int i_id )
 551 {
 552     QModelIndex index = model->index( i_id, 0 );
 553     emit invoked ( index );
 554 }
 555
 556 LocationButton::LocationButton( const QString &text, bool bold, bool arrow )
 557   : b_arrow( arrow )
 558 {
 559     QFont font;
 560     font.setBold( bold );
 561     setFont( font );
 562     setText( text );
 563 }
 564
 565 #define PADDING 4
 566
 567 void LocationButton::paintEvent ( QPaintEvent * event )
 568 {
 569     QStyleOptionButton option;
 570     option.initFrom( this );
 571     option.state |= QStyle::State_Enabled;
 572     QPainter p( this );
 573
 574     if( underMouse() )
 575         style()->drawControl( QStyle::CE_PushButtonBevel, &option, &p );
 576
 577     int margin = style()->pixelMetric(QStyle::PM_DefaultFrameWidth,0,this) + PADDING;
 578
 579     QRect rect = option.rect.adjusted( b_arrow ? 15 + margin : margin, 0, margin * -1, 0 );
 580     p.drawText( rect, Qt::AlignVCenter,
 581                 fontMetrics().elidedText( text(), Qt::ElideRight, rect.width() ) );
 582
 583     if( b_arrow )
 584     {
 585         option.rect.setX( margin );
 586         option.rect.setWidth( 8 );
 587         style()->drawPrimitive( QStyle::PE_IndicatorArrowRight, &option, &p );
 588     }
 589 }
 590
 591 QSize LocationButton::sizeHint() const
 592 {
 593     int frameWidth = style()->pixelMetric(QStyle::PM_DefaultFrameWidth,0,this);
 594     QSize s( fontMetrics().boundingRect( text() ).size() );
 595     s.setWidth( s.width() + ( 2 * frameWidth ) + ( 2 * PADDING ) + ( b_arrow ? 15 : 0 ) );
 596     s.setHeight( QPushButton::sizeHint().height() );
 597     return s;
 598 }
 599
 600 #undef PADDING