* Add filter capabilities to TreeModel / -View.

src/libtomahawk/database/databasecommand_allartists.cpp

@@ -29,7 +29,7 @@ DatabaseCommand_AllArtists::exec( DatabaseImpl* dbi )
 {
     TomahawkSqlQuery query = dbi->newquery();
     QList<Tomahawk::artist_ptr> al;
-    QString orderToken, sourceToken;
+    QString orderToken, sourceToken, filterToken, tables;
 
     switch ( m_sortOrder )
     {
@@ -43,18 +43,31 @@ DatabaseCommand_AllArtists::exec( DatabaseImpl* dbi )
     if ( !m_collection.isNull() )
         sourceToken = QString( "AND file.source %1" ).arg( m_collection->source()->isLocal() ? "IS NULL" : QString( "= %1" ).arg( m_collection->source()->id() ) );
 
+    if ( !m_filter.isEmpty() )
+    {
+        filterToken = QString( "AND file_join.track = track.id AND ( artist.name LIKE :filter OR track.name LIKE :filter )" );
+        tables = "artist, track, file, file_join";
+    }
+    else
+        tables = "artist, file, file_join";
+
     QString sql = QString(
             "SELECT DISTINCT artist.id, artist.name "
-            "FROM artist, file, file_join "
+            "FROM %1 "
             "WHERE file.id = file_join.file "
             "AND file_join.artist = artist.id "
-            "%1 %2 %3 %4"
+            "%2 %3 %4 %5 %6"
-            ).arg( sourceToken )
+            ).arg( tables )
+             .arg( sourceToken )
+             .arg( filterToken )
              .arg( m_sortOrder > 0 ? QString( "ORDER BY %1" ).arg( orderToken ) : QString() )
              .arg( m_sortDescending ? "DESC" : QString() )
              .arg( m_amount > 0 ? QString( "LIMIT 0, %1" ).arg( m_amount ) : QString() );
 
     query.prepare( sql );
+    if ( !m_filter.isEmpty() )
+        query.bindValue( ":filter", QString( "%%1%" ).arg( m_filter ) );
+
     query.exec();
 
     while( query.next() )

src/libtomahawk/database/databasecommand_allartists.h

@@ -54,6 +54,7 @@ public:
     void setLimit( unsigned int amount ) { m_amount = amount; }
     void setSortOrder( DatabaseCommand_AllArtists::SortOrder order ) { m_sortOrder = order; }
     void setSortDescending( bool descending ) { m_sortDescending = descending; }
+    void setFilter( const QString& filter ) { m_filter = filter; }
 
 signals:
     void artists( const QList<Tomahawk::artist_ptr>& );
@@ -64,6 +65,7 @@ private:
     unsigned int m_amount;
     DatabaseCommand_AllArtists::SortOrder m_sortOrder;
     bool m_sortDescending;
+    QString m_filter;
 };
 
 #endif // DATABASECOMMAND_ALLARTISTS_H

src/libtomahawk/playlist/artistview.cpp

@@ -203,6 +203,15 @@ ArtistView::onFilterChanged( const QString& )
 {
     if ( selectedIndexes().count() )
         scrollTo( selectedIndexes().at( 0 ), QAbstractItemView::PositionAtCenter );
+
+    if ( !proxyModel()->filter().isEmpty() && !proxyModel()->trackCount() && model()->trackCount() )
+    {
+/*        m_overlay->setText( tr( "Sorry, your filter '%1' did not match any results." ).arg( proxyModel()->filter() ) );
+        m_overlay->show();*/
+    }
+/*    else
+        if ( model()->trackCount() )
+            m_overlay->hide();*/
 }
 
 

src/libtomahawk/playlist/artistview.h

@@ -60,7 +60,7 @@ public:
     virtual QPixmap pixmap() const { return QPixmap( RESPATH "images/music-icon.png" ); }
 
     virtual bool showStatsBar() const { return false; }
-    virtual bool showFilter() const { return false; }
+    virtual bool showFilter() const { return true; }
 
     virtual void setShowModes( bool b ) { m_showModes = b; }
     virtual bool showModes() const { return m_showModes; }

src/libtomahawk/playlist/trackproxymodel.cpp

@@ -65,7 +65,6 @@ TrackProxyModel::setSourceTrackModel( TrackModel* sourceModel )
 void
 TrackProxyModel::setFilter( const QString& pattern )
 {
-    qDebug() << Q_FUNC_INFO;
     PlaylistInterface::setFilter( pattern );
     setFilterRegExp( pattern );
 

src/libtomahawk/playlist/trackview.cpp

@@ -364,8 +364,7 @@ TrackView::onFilterChanged( const QString& )
     if ( selectedIndexes().count() )
         scrollTo( selectedIndexes().at( 0 ), QAbstractItemView::PositionAtCenter );
 
-    if ( !proxyModel()->filter().isEmpty() && !proxyModel()->trackCount() &&
+    if ( !proxyModel()->filter().isEmpty() && !proxyModel()->trackCount() && model()->trackCount() )
-         model()->trackCount() )
     {
         m_overlay->setText( tr( "Sorry, your filter '%1' did not match any results." ).arg( proxyModel()->filter() ) );
         m_overlay->show();

src/libtomahawk/playlist/treemodel.cpp

@@ -528,6 +528,7 @@ TreeModel::addAllCollections()
 
     emit loadingStarted();
     DatabaseCommand_AllArtists* cmd = new DatabaseCommand_AllArtists();
+    cmd->setFilter( m_filter );
 
     connect( cmd, SIGNAL( artists( QList<Tomahawk::artist_ptr> ) ),
                     SLOT( onArtistsAdded( QList<Tomahawk::artist_ptr> ) ) );
@@ -601,6 +602,7 @@ TreeModel::addCollection( const collection_ptr& collection )
 
     m_collection = collection;
     DatabaseCommand_AllArtists* cmd = new DatabaseCommand_AllArtists( collection );
+    cmd->setFilter( m_filter );
 
     connect( cmd, SIGNAL( artists( QList<Tomahawk::artist_ptr> ) ),
                     SLOT( onArtistsAdded( QList<Tomahawk::artist_ptr> ) ) );
@@ -783,6 +785,19 @@ TreeModel::infoSystemInfo( Tomahawk::InfoSystem::InfoRequestData requestData, QV
 }
 
 
+void
+TreeModel::setFilter( const QString& pattern )
+{
+    m_filter = pattern;
+    clear();
+
+    if ( !m_collection.isNull() )
+        addCollection( m_collection );
+    else
+        addAllCollections();
+}
+
+
 void
 TreeModel::infoSystemFinished( QString target )
 {

src/libtomahawk/playlist/treemodel.h

@@ -99,6 +99,9 @@ public:
     virtual void setTitle( const QString& title ) { m_title = title; }
     virtual void setDescription( const QString& description ) { m_description = description; }
 
+    virtual QString filter() const { return m_filter; }
+    virtual void setFilter( const QString& pattern );
+
     TreeModelItem* itemFromIndex( const QModelIndex& index ) const
     {
         if ( index.isValid() )
@@ -153,6 +156,7 @@ private:
 
     Tomahawk::collection_ptr m_collection;
     QHash<qlonglong, QPersistentModelIndex> m_coverHash;
+    QString m_filter;
 };
 
 #endif // ALBUMMODEL_H

src/libtomahawk/playlist/treeproxymodel.cpp

@@ -63,10 +63,12 @@ TreeProxyModel::setSourceTreeModel( TreeModel* sourceModel )
 void
 TreeProxyModel::setFilter( const QString& pattern )
 {
-    qDebug() << Q_FUNC_INFO;
+    PlaylistInterface::setFilter( pattern );
     setFilterRegExp( pattern );
+    m_model->setFilter( pattern );
 
     emit filterChanged( pattern );
+    emit trackCountChanged( trackCount() );
 }
 
 
@@ -110,7 +112,6 @@ TreeProxyModel::filterAcceptsRow( int sourceRow, const QModelIndex& sourceParent
         m_cache.insertMulti( sourceParent, pi->result() );
     }
 
-    if ( filterRegExp().isEmpty() )
     return true;
 
     QStringList sl = filterRegExp().pattern().split( " ", QString::SkipEmptyParts );

src/libtomahawk/playlist/treeproxymodel.h

@@ -54,6 +54,7 @@ public:
     virtual Tomahawk::result_ptr siblingItem( int direction );
     virtual Tomahawk::result_ptr siblingItem( int direction, bool readOnly );
 
+    virtual QString filter() const { return filterRegExp().pattern(); }
     virtual void setFilter( const QString& pattern );
 
     virtual PlaylistInterface::RepeatMode repeatMode() const { return m_repeatMode; }