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akonadi

entitytreeview.cpp
00001 /*
00002     Copyright (c) 2006 - 2007 Volker Krause <vkrause@kde.org>
00003     Copyright (c) 2008 Stephen Kelly <steveire@gmail.com>
00004 
00005     This library is free software; you can redistribute it and/or modify it
00006     under the terms of the GNU Library General Public License as published by
00007     the Free Software Foundation; either version 2 of the License, or (at your
00008     option) any later version.
00009 
00010     This library is distributed in the hope that it will be useful, but WITHOUT
00011     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
00012     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
00013     License for more details.
00014 
00015     You should have received a copy of the GNU Library General Public License
00016     along with this library; see the file COPYING.LIB.  If not, write to the
00017     Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
00018     02110-1301, USA.
00019 */
00020 
00021 #include "entitytreeview.h"
00022 
00023 #include "dragdropmanager_p.h"
00024 
00025 #include <QtCore/QDebug>
00026 #include <QtCore/QTimer>
00027 #include <QtGui/QApplication>
00028 #include <QtGui/QDragMoveEvent>
00029 #include <QtGui/QHeaderView>
00030 #include <QtGui/QMenu>
00031 
00032 #include <KAction>
00033 #include <KLocale>
00034 #include <KMessageBox>
00035 #include <KUrl>
00036 #include <KXMLGUIFactory>
00037 
00038 #include <akonadi/collection.h>
00039 #include <akonadi/control.h>
00040 #include <akonadi/item.h>
00041 #include <akonadi/entitytreemodel.h>
00042 
00043 #include <kdebug.h>
00044 #include <kxmlguiclient.h>
00045 
00046 #include "progressspinnerdelegate_p.h"
00047 
00048 using namespace Akonadi;
00049 
00053 class EntityTreeView::Private
00054 {
00055 public:
00056   Private( EntityTreeView *parent )
00057       : mParent( parent )
00058 #ifndef QT_NO_DRAGANDDROP
00059       , mDragDropManager( new DragDropManager( mParent ) )
00060 #endif
00061       , mXmlGuiClient( 0 )
00062   {
00063   }
00064 
00065   void init();
00066   void itemClicked( const QModelIndex& );
00067   void itemDoubleClicked( const QModelIndex& );
00068   void itemCurrentChanged( const QModelIndex& );
00069 
00070   void slotSelectionChanged( const QItemSelection & selected, const QItemSelection & deselected );
00071 
00072   EntityTreeView *mParent;
00073   QBasicTimer mDragExpandTimer;
00074   DragDropManager *mDragDropManager;
00075   KXMLGUIClient *mXmlGuiClient;
00076 };
00077 
00078 void EntityTreeView::Private::init()
00079 {
00080   Akonadi::DelegateAnimator *animator = new Akonadi::DelegateAnimator(mParent);
00081   Akonadi::ProgressSpinnerDelegate *customDelegate = new Akonadi::ProgressSpinnerDelegate(animator, mParent);
00082   mParent->setItemDelegate(customDelegate);
00083 
00084   mParent->header()->setClickable( true );
00085   mParent->header()->setStretchLastSection( false );
00086 //   mParent->setRootIsDecorated( false );
00087 
00088   // QTreeView::autoExpandDelay has very strange behaviour. It toggles the collapse/expand state
00089   // of the item the cursor is currently over when a timer event fires.
00090   // The behaviour we want is to expand a collapsed row on drag-over, but not collapse it.
00091   // mDragExpandTimer is used to achieve this.
00092 //   mParent->setAutoExpandDelay ( QApplication::startDragTime() );
00093 
00094   mParent->setSortingEnabled( true );
00095   mParent->sortByColumn( 0, Qt::AscendingOrder );
00096   mParent->setEditTriggers( QAbstractItemView::EditKeyPressed );
00097   mParent->setAcceptDrops( true );
00098 #ifndef QT_NO_DRAGANDDROP
00099   mParent->setDropIndicatorShown( true );
00100   mParent->setDragDropMode( DragDrop );
00101   mParent->setDragEnabled( true );
00102 #endif
00103 
00104   mParent->connect( mParent, SIGNAL( clicked( const QModelIndex& ) ),
00105                     mParent, SLOT( itemClicked( const QModelIndex& ) ) );
00106   mParent->connect( mParent, SIGNAL( doubleClicked( const QModelIndex& ) ),
00107                     mParent, SLOT( itemDoubleClicked( const QModelIndex& ) ) );
00108 
00109   Control::widgetNeedsAkonadi( mParent );
00110 }
00111 
00112 void EntityTreeView::Private::slotSelectionChanged( const QItemSelection & selected, const QItemSelection& )
00113 {
00114   const int column = 0;
00115   foreach ( const QItemSelectionRange &range, selected ) {
00116     const QModelIndex index = range.topLeft();
00117 
00118     if ( index.column() > 0 )
00119       continue;
00120 
00121     for ( int row = index.row(); row <= range.bottomRight().row(); ++row ) {
00122       // Don't use canFetchMore here. We need to bypass the check in
00123       // the EntityFilterModel when it shows only collections.
00124       mParent->model()->fetchMore( index.sibling( row, column ) );
00125     }
00126   }
00127 }
00128 
00129 void EntityTreeView::Private::itemClicked( const QModelIndex &index )
00130 {
00131   if ( !index.isValid() )
00132     return;
00133   QModelIndex idx = index.sibling( index.row(), 0);
00134 
00135   const Collection collection = idx.model()->data( idx, EntityTreeModel::CollectionRole ).value<Collection>();
00136   if ( collection.isValid() ) {
00137     emit mParent->clicked( collection );
00138   } else {
00139     const Item item = idx.model()->data( idx, EntityTreeModel::ItemRole ).value<Item>();
00140     if ( item.isValid() )
00141       emit mParent->clicked( item );
00142   }
00143 }
00144 
00145 void EntityTreeView::Private::itemDoubleClicked( const QModelIndex &index )
00146 {
00147   if ( !index.isValid() )
00148     return;
00149   QModelIndex idx = index.sibling( index.row(), 0);
00150   const Collection collection = idx.model()->data( idx, EntityTreeModel::CollectionRole ).value<Collection>();
00151   if ( collection.isValid() ) {
00152     emit mParent->doubleClicked( collection );
00153   } else {
00154     const Item item = idx.model()->data( idx, EntityTreeModel::ItemRole ).value<Item>();
00155     if ( item.isValid() )
00156       emit mParent->doubleClicked( item );
00157   }
00158 }
00159 
00160 void EntityTreeView::Private::itemCurrentChanged( const QModelIndex &index )
00161 {
00162   if ( !index.isValid() )
00163     return;
00164   QModelIndex idx = index.sibling( index.row(), 0);
00165   const Collection collection = idx.model()->data( idx, EntityTreeModel::CollectionRole ).value<Collection>();
00166   if ( collection.isValid() ) {
00167     emit mParent->currentChanged( collection );
00168   } else {
00169     const Item item = idx.model()->data( idx, EntityTreeModel::ItemRole ).value<Item>();
00170     if ( item.isValid() )
00171       emit mParent->currentChanged( item );
00172   }
00173 }
00174 
00175 EntityTreeView::EntityTreeView( QWidget * parent )
00176   : QTreeView( parent ),
00177     d( new Private( this ) )
00178 {
00179   setSelectionMode( QAbstractItemView::SingleSelection );
00180   d->init();
00181 }
00182 
00183 EntityTreeView::EntityTreeView( KXMLGUIClient *xmlGuiClient, QWidget * parent )
00184   : QTreeView( parent ),
00185     d( new Private( this ) )
00186 {
00187   d->mXmlGuiClient = xmlGuiClient;
00188   d->init();
00189 }
00190 
00191 EntityTreeView::~EntityTreeView()
00192 {
00193   delete d->mDragDropManager;
00194   delete d;
00195 }
00196 
00197 void EntityTreeView::setModel( QAbstractItemModel * model )
00198 {
00199   if ( selectionModel() ) {
00200     disconnect( selectionModel(), SIGNAL( currentChanged( const QModelIndex&, const QModelIndex& ) ),
00201            this, SLOT( itemCurrentChanged( const QModelIndex& ) ) );
00202 
00203     disconnect( selectionModel(), SIGNAL( selectionChanged( const QItemSelection&, const QItemSelection& ) ),
00204            this, SLOT( slotSelectionChanged( const QItemSelection&, const QItemSelection& ) ) );
00205   }
00206 
00207   QTreeView::setModel( model );
00208   header()->setStretchLastSection( true );
00209 
00210   connect( selectionModel(), SIGNAL( currentChanged( const QModelIndex&, const QModelIndex& ) ),
00211            SLOT( itemCurrentChanged( const QModelIndex& ) ) );
00212 
00213   connect( selectionModel(), SIGNAL( selectionChanged( const QItemSelection&, const QItemSelection& ) ),
00214            SLOT( slotSelectionChanged( const QItemSelection&, const QItemSelection& ) ) );
00215 }
00216 
00217 
00218 void EntityTreeView::timerEvent( QTimerEvent *event )
00219 {
00220   if ( event->timerId() == d->mDragExpandTimer.timerId() ) {
00221     const QPoint pos = viewport()->mapFromGlobal( QCursor::pos() );
00222     if ( state() == QAbstractItemView::DraggingState && viewport()->rect().contains( pos ) )
00223       setExpanded( indexAt( pos ), true );
00224   }
00225 
00226   QTreeView::timerEvent( event );
00227 }
00228 
00229 #ifndef QT_NO_DRAGANDDROP
00230 void EntityTreeView::dragMoveEvent( QDragMoveEvent * event )
00231 {
00232   d->mDragExpandTimer.start( QApplication::startDragTime() , this );
00233 
00234   if ( d->mDragDropManager->dropAllowed( event ) ) {
00235     // All urls are supported. process the event.
00236     QTreeView::dragMoveEvent( event );
00237     return;
00238   }
00239 
00240   event->setDropAction( Qt::IgnoreAction );
00241   return;
00242 }
00243 
00244 void EntityTreeView::dropEvent( QDropEvent * event )
00245 {
00246   if ( d->mDragDropManager->processDropEvent( event ) )
00247     QTreeView::dropEvent( event );
00248 
00249   d->mDragExpandTimer.stop();
00250 }
00251 #endif
00252 
00253 #ifndef QT_NO_CONTEXTMENU
00254 void EntityTreeView::contextMenuEvent( QContextMenuEvent * event )
00255 {
00256   if ( !d->mXmlGuiClient || !model())
00257     return;
00258 
00259   const QModelIndex index = indexAt( event->pos() );
00260 
00261   QMenu *popup = 0;
00262 
00263   // check if the index under the cursor is a collection or item
00264   const Item item = model()->data( index, EntityTreeModel::ItemRole ).value<Item>();
00265   if ( item.isValid() )
00266     popup = static_cast<QMenu*>( d->mXmlGuiClient->factory()->container(
00267                                  QLatin1String( "akonadi_itemview_contextmenu" ), d->mXmlGuiClient ) );
00268   else
00269     popup = static_cast<QMenu*>( d->mXmlGuiClient->factory()->container(
00270                                  QLatin1String( "akonadi_collectionview_contextmenu" ), d->mXmlGuiClient ) );
00271   if ( popup )
00272     popup->exec( event->globalPos() );
00273 }
00274 #endif
00275 
00276 void EntityTreeView::setXmlGuiClient( KXMLGUIClient * xmlGuiClient )
00277 {
00278   d->mXmlGuiClient = xmlGuiClient;
00279 }
00280 
00281 #ifndef QT_NO_DRAGANDDROP
00282 void EntityTreeView::startDrag( Qt::DropActions supportedActions )
00283 {
00284   d->mDragDropManager->startDrag( supportedActions );
00285 }
00286 #endif
00287 
00288 
00289 void EntityTreeView::setDropActionMenuEnabled( bool enabled )
00290 {
00291 #ifndef QT_NO_DRAGANDDROP
00292   d->mDragDropManager->setShowDropActionMenu( enabled );
00293 #endif
00294 }
00295 
00296 bool EntityTreeView::isDropActionMenuEnabled() const
00297 {
00298 #ifndef QT_NO_DRAGANDDROP
00299   return d->mDragDropManager->showDropActionMenu();
00300 #else
00301   return false;
00302 #endif
00303 }
00304 
00305 #include "entitytreeview.moc"

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