Show ruler marker for cursor position

Author: mhugent

src/gui/qgscomposerruler.cpp

@@ -48,8 +48,8 @@ void QgsComposerRuler::paintEvent( QPaintEvent* event )
       markerPos += 10.0;
     }
 
-    qWarning( QString::number( startX ).toLocal8Bit().data() );
-    qWarning( QString::number( endX ).toLocal8Bit().data() );
+    p.setPen( QColor( Qt::red ) );
+    p.drawLine( mMarkerPos.x(), 0, mMarkerPos.x(), RULER_MIN_SIZE );
   }
   else //vertical
   {
@@ -72,6 +72,9 @@ void QgsComposerRuler::paintEvent( QPaintEvent* event )
       }
       markerPos += 10.0;
     }
+
+    p.setPen( QColor( Qt::red ) );
+    p.drawLine( 0, mMarkerPos.y(), RULER_MIN_SIZE, mMarkerPos.y() );
   }
 }
 

src/gui/qgscomposerruler.h

@@ -19,13 +19,15 @@ class QgsComposerRuler: public QWidget
     QSize minimumSizeHint() const;
 
     void setSceneTransform( const QTransform& transform );
+    void updateMarker( const QPointF& pos ) { mMarkerPos = pos; repaint(); }
 
   protected:
     void paintEvent( QPaintEvent* event );
 
   private:
     Direction mDirection;
     QTransform mTransform;
+    QPointF mMarkerPos;
 };
 
 #endif // QGSCOMPOSERRULER_H

src/gui/qgscomposerview.cpp

@@ -368,6 +368,15 @@ void QgsComposerView::mouseMoveEvent( QMouseEvent* e )
     return;
   }
 
+  if ( mHorizontalRuler )
+  {
+    mHorizontalRuler->updateMarker( e->posF() );
+  }
+  if ( mVerticalRuler )
+  {
+    mVerticalRuler->updateMarker( e->posF() );
+  }
+
   if ( e->buttons() == Qt::NoButton )
   {
     if ( mCurrentTool == Select )