add a loading animation when loading collections

src/libtomahawk/playlist/collectionflatmodel.cpp

@@ -44,6 +44,22 @@ CollectionFlatModel::headerData( int section, Qt::Orientation orientation, int r
     return TrackModel::headerData( section, orientation, role );
 }
 
+void 
+CollectionFlatModel::addCollections( const QList< collection_ptr >& collections )
+{
+    qDebug() << Q_FUNC_INFO << "Adding collections!";
+    foreach( const collection_ptr& col, collections ) 
+    {
+        if( !col->isLoaded() )
+            m_loadingCollections << col.data();
+        
+        addCollection( col );
+    }
+    
+    if( m_loadingCollections.isEmpty() )
+        emit doneLoadingCollections();
+}
+
 
 void
 CollectionFlatModel::addCollection( const collection_ptr& collection )
@@ -60,8 +76,12 @@ CollectionFlatModel::addCollection( const collection_ptr& collection )
     if ( collection->isLoaded() )
         onTracksAdded( collection->tracks() );
     else
+    {
         collection->tracks(); // data will arrive via signals
-
+        
+        m_loadingCollections << collection.data();
+    }
+    
     if ( collection->source()->isLocal() )
         setTitle( tr( "Your Collection" ) );
     else
@@ -164,6 +184,13 @@ CollectionFlatModel::onTracksAdded( const QList<Tomahawk::query_ptr>& tracks )
 {
     qDebug() << Q_FUNC_INFO << tracks.count() << rowCount( QModelIndex() );
 
+    if( !m_loadingCollections.isEmpty() && sender() && qobject_cast< Collection* >( sender() ) ) { // we are keeping track and are called as a slot
+        m_loadingCollections.removeAll( qobject_cast< Collection* >( sender() ) );
+        
+        if( m_loadingCollections.isEmpty() )
+            emit doneLoadingCollections();
+    }
+    
     bool kickOff = m_tracksToAdd.isEmpty();
     m_tracksToAdd << tracks;
 

src/libtomahawk/playlist/collectionflatmodel.h

@@ -34,6 +34,8 @@ public:
     QVariant data( const QModelIndex& index, int role ) const;
     QVariant headerData( int section, Qt::Orientation orientation, int role ) const;
 
+    void addCollections( const QList< Tomahawk::collection_ptr >& collections );
+    
     void addCollection( const Tomahawk::collection_ptr& collection );
     void removeCollection( const Tomahawk::collection_ptr& collection );
 
@@ -47,6 +49,7 @@ signals:
 
     void itemSizeChanged( const QModelIndex& index );
 
+    void doneLoadingCollections();
 private slots:
     void onDataChanged();
 
@@ -60,6 +63,8 @@ private slots:
 private:
     QMap< Tomahawk::collection_ptr, QPair< int, int > > m_collectionRows;
     QList<Tomahawk::query_ptr> m_tracksToAdd;
+    // just to keep track of what we are waiting to be loaded
+    QList<Tomahawk::Collection*> m_loadingCollections;
 };
 
 #endif // COLLECTIONFLATMODEL_H

src/libtomahawk/playlist/dynamic/widgets/LoadingSpinner.cpp

@@ -41,6 +41,7 @@ LoadingSpinner::LoadingSpinner( QWidget* parent )
     
     connect( m_anim, SIGNAL( frameChanged( int ) ), this, SLOT( update() ) );
     
+    setSizePolicy( QSizePolicy::Fixed, QSizePolicy::Fixed );
     hide();
 }
 
@@ -96,6 +97,7 @@ LoadingSpinner::reposition()
     int x = ( parentWidget()->width() / 2 ) - ( width() / 2 );
     int y = ( parentWidget()->height() / 2 ) - ( height() / 2 );
     move( x, y );
+    resize( 64, 64 );
 }
 
 

src/libtomahawk/playlist/playlistmanager.cpp

@@ -27,6 +27,7 @@
 
 #include "widgets/welcomewidget.h"
 #include "widgets/infowidgets/sourceinfowidget.h"
+#include "dynamic/widgets/LoadingSpinner.h"
 
 #define FILTER_TIMEOUT 280
 
@@ -47,6 +48,7 @@ PlaylistManager::PlaylistManager( QObject* parent )
     , m_widget( new QWidget() )
     , m_welcomeWidget( new WelcomeWidget() )
     , m_currentMode( 0 )
+    , m_loadingSpinner( 0 )
 {
     s_instance = this;
 
@@ -99,6 +101,9 @@ PlaylistManager::PlaylistManager( QObject* parent )
     m_widget->layout()->setMargin( 0 );
     m_widget->layout()->setSpacing( 0 );
 
+    m_loadingSpinner = new LoadingSpinner( m_widget );
+    connect( m_superCollectionFlatModel, SIGNAL( doneLoadingCollections() ), m_loadingSpinner, SLOT( fadeOut() ) );
+    
     connect( &m_filterTimer, SIGNAL( timeout() ), SLOT( applyFilter() ) );
 
     connect( m_topbar, SIGNAL( filterTextChanged( QString ) ),
@@ -251,6 +256,9 @@ PlaylistManager::show( const Tomahawk::collection_ptr& collection )
             view->setFrameShape( QFrame::NoFrame );
             view->setAttribute( Qt::WA_MacShowFocusRect, 0 );
             model->addCollection( collection );
+            
+            m_loadingSpinner->fadeIn();
+            connect( model, SIGNAL( doneLoadingCollections() ), m_loadingSpinner, SLOT( fadeOut() ) );
 
             m_collectionViews.insert( collection, view );
         }
@@ -328,19 +336,21 @@ PlaylistManager::show( ViewPage* page )
 bool
 PlaylistManager::showSuperCollection()
 {
+    QList< collection_ptr > toAdd;
     foreach( const Tomahawk::source_ptr& source, SourceList::instance()->sources() )
     {
         if ( !m_superCollections.contains( source->collection() ) )
         {
             m_superCollections.append( source->collection() );
-            m_superCollectionFlatModel->addCollection( source->collection() );
+            toAdd << source->collection();
             m_superAlbumModel->addCollection( source->collection() );
         }
 
         m_superCollectionFlatModel->setTitle( tr( "All available tracks" ) );
         m_superAlbumModel->setTitle( tr( "All available albums" ) );
     }
-
+    m_superCollectionFlatModel->addCollections( toAdd );
+    
     if ( m_currentMode == 0 )
     {
         setPage( m_superCollectionView );
@@ -349,7 +359,9 @@ PlaylistManager::showSuperCollection()
     {
         setPage( m_superAlbumView );
     }
-
+    
+    m_loadingSpinner->fadeIn();
+    
     emit numSourcesChanged( m_superCollections.count() );
 
     return true;

src/libtomahawk/playlist/playlistmanager.h

@@ -11,6 +11,7 @@
 
 #include "dllmacro.h"
 
+class LoadingSpinner;
 class AnimatedSplitter;
 class AlbumModel;
 class AlbumView;
@@ -143,6 +144,7 @@ private:
     CollectionFlatModel* m_superCollectionFlatModel;
     CollectionView* m_superCollectionView;
     WelcomeWidget* m_welcomeWidget;
+    LoadingSpinner* m_loadingSpinner;
     
     QList< Tomahawk::collection_ptr > m_superCollections;