Show an error message when the station couldn't resolve enough tracks

src/libtomahawk/playlist/dynamic/DynamicModel.cpp

@@ -112,7 +112,7 @@ DynamicModel::trackResolveFinished( bool success )
         if( m_currentAttempts < 30 ) {
             m_playlist->generator()->fetchNext();
         } else {
-            // TODO handle failure
+            emit trackGenerationFailure( tr( "Could not find a playable track.\n\nPlease change the filters and try again." ) );
         }
     }
 }

src/libtomahawk/playlist/dynamic/DynamicModel.h

@@ -27,7 +27,7 @@ class StationModelItem;
 
     
 /**
- * Extends PlaylistModel with support for handling StationModelItems
+ * Extends PlaylistModel with support for handling stations
  */
 class DynamicModel : public PlaylistModel
 {
@@ -45,6 +45,8 @@ public:
 signals:
     void collapseFromTo( int startRow, int num );
     
+    void trackGenerationFailure( const QString& msg );
+    
 private slots:    
     void newTrackGenerated( const Tomahawk::query_ptr& query );
     

src/libtomahawk/playlist/dynamic/DynamicView.cpp

@@ -78,6 +78,14 @@ DynamicView::showMessageTimeout( const QString& title, const QString& body )
     overlay()->show( 5 );
 }
 
+void 
+DynamicView::showMessage(const QString& message)
+{
+    overlay()->setText( message );
+    overlay()->show();
+}
+
+
 void 
 DynamicView::onTrackCountChanged( unsigned int tracks )
 {

src/libtomahawk/playlist/dynamic/DynamicView.h

@@ -42,6 +42,7 @@ public:
     
 public slots:
     void showMessageTimeout( const QString& title, const QString& body );
+    void showMessage( const QString& message );
     
     // collapse and animate the transition
     // there MUST be a row *after* startRow + num. that is, you can't collapse

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

@@ -112,7 +112,8 @@ DynamicControlWrapper::removeFromLayout()
 }
 
 
-QToolButton* DynamicControlWrapper::initButton( QWidget* parent )
+QToolButton* 
+DynamicControlWrapper::initButton( QWidget* parent )
 {
     QToolButton* btn = new QToolButton( parent );
     btn->setSizePolicy( QSizePolicy::Fixed, QSizePolicy::Fixed );
@@ -123,7 +124,8 @@ QToolButton* DynamicControlWrapper::initButton( QWidget* parent )
     return btn;
 }
 
-QWidget* DynamicControlWrapper::createDummy( QWidget* fromW, QWidget* parent )
+QWidget* 
+DynamicControlWrapper::createDummy( QWidget* fromW, QWidget* parent )
 {
     QWidget* dummy = new QWidget( parent );
     dummy->setContentsMargins( 0, 0, 0, 0 );

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

@@ -90,8 +90,9 @@ DynamicWidget::DynamicWidget( const Tomahawk::dynplaylist_ptr& playlist, QWidget
     m_view->setModel( m_model );
     m_view->setContentsMargins( 0, 0, 0, 0 );
     m_layout->addWidget( m_view, 1 );
+    
     connect( m_model, SIGNAL( collapseFromTo( int, int ) ), m_view, SLOT( collapseEntries( int, int ) ), Qt::QueuedConnection );
-        
+    connect( m_model, SIGNAL( trackGenerationFailure( QString ) ), m_view, SLOT( showMessage( QString ) ) );    
     loadDynamicPlaylist( playlist );
     
     m_layout->setContentsMargins( 0, 0, 0, 0 );