Qt: EPG: add channels line background

modules/gui/qt4/components/epg/EPGItem.cpp

@@ -191,7 +191,12 @@ void EPGItem::updatePos()
 void EPGItem::hoverEnterEvent ( QGraphicsSceneHoverEvent * event )
 {
     event->accept();
-    update();
+    scene()->update();
+}
+
+void EPGItem::hoverLeaveEvent ( QGraphicsSceneHoverEvent * event )
+{ /* required to redraw our background without flaws */
+    hoverEnterEvent( event );
 }
 
 void EPGItem::focusInEvent( QFocusEvent * event )

modules/gui/qt4/components/epg/EPGItem.hpp

@@ -59,6 +59,7 @@ public:
 protected:
     virtual void focusInEvent( QFocusEvent * event );
     virtual void hoverEnterEvent ( QGraphicsSceneHoverEvent * );
+    virtual void hoverLeaveEvent ( QGraphicsSceneHoverEvent * );
 
 private:
     EPGView     *m_view;

modules/gui/qt4/components/epg/EPGView.cpp

@@ -31,6 +31,16 @@
 #include <QtDebug>
 #include <QGraphicsTextItem>
 
+EPGGraphicsScene::EPGGraphicsScene( QObject *parent ) : QGraphicsScene( parent )
+{}
+
+void EPGGraphicsScene::drawBackground( QPainter *painter, const QRectF &rect)
+{
+    painter->setPen( QPen( QColor( 224, 224, 224 ) ) );
+    for( int y = rect.top() + TRACKS_HEIGHT ; y < rect.bottom() ; y += TRACKS_HEIGHT )
+       painter->drawLine( QLineF( rect.left(), y, rect.right(), y ) );
+}
+
 EPGView::EPGView( QWidget *parent ) : QGraphicsView( parent )
 {
     setContentsMargins( 0, 0, 0, 0 );
@@ -39,7 +49,7 @@ EPGView::EPGView( QWidget *parent ) : QGraphicsView( parent )
 
     m_startTime = QDateTime::currentDateTime();
 
-    QGraphicsScene *EPGscene = new QGraphicsScene( this );
+    EPGGraphicsScene *EPGscene = new EPGGraphicsScene( this );
 
     setScene( EPGscene );
 }

modules/gui/qt4/components/epg/EPGView.hpp

@@ -27,6 +27,7 @@
 #include "EPGItem.hpp"
 
 #include <QGraphicsView>
+#include <QGraphicsScene>
 #include <QList>
 #include <QMap>
 #include <QMutex>
@@ -37,6 +38,15 @@
 typedef QMap<QDateTime, EPGItem *> EPGEventByTimeQMap;
 typedef QMap<QString, EPGEventByTimeQMap* > EPGTimeMapByChannelQMap;
 
+class EPGGraphicsScene : public QGraphicsScene
+{
+Q_OBJECT
+public:
+    explicit EPGGraphicsScene( QObject *parent = 0 );
+protected:
+    void drawBackground ( QPainter *, const QRectF &);
+};
+
 class EPGView : public QGraphicsView
 {
 Q_OBJECT