Port zoom rectangle from QRubberBand to QgsRubberBand. Fixes zoom rectangle fill on x11 platform after resize bug workaround

git-svn-id: http://svn.osgeo.org/qgis/trunk@15838 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: mhugent

python/gui/qgsrubberband.sip

@@ -44,6 +44,11 @@ class QgsRubberBand: QgsMapCanvasItem
     */
     void addGeometry(QgsGeometry* geom, QgsVectorLayer* layer);
 
+    /**Sets this rubber band to a map canvas rectangle
+      @param rect rectangle in canvas coordinates
+      @note added in version 1.7*/
+    void setToCanvasRectangle( const QRect& rect );
+
     /**Adds translation to original coordinates (all in map coordinates)*/
     void setTranslationOffset(double dx, double dy);
 

src/gui/qgsmaptoolzoom.cpp

@@ -18,23 +18,28 @@
 #include "qgsmapcanvas.h"
 #include "qgsmaptopixel.h"
 #include "qgscursors.h"
+#include "qgsrubberband.h"
 
 #include <QMouseEvent>
-#include <QRubberBand>
 #include <QRect>
 #include <QCursor>
 #include <QPixmap>
 #include "qgslogger.h"
 
 
 QgsMapToolZoom::QgsMapToolZoom( QgsMapCanvas* canvas, bool zoomOut )
-    : QgsMapTool( canvas ), mZoomOut( zoomOut ), mDragging( false )
+    : QgsMapTool( canvas ), mZoomOut( zoomOut ), mDragging( false ), mRubberBand( 0 )
 {
   // set the cursor
   QPixmap myZoomQPixmap = QPixmap(( const char ** )( zoomOut ? zoom_out : zoom_in ) );
   mCursor = QCursor( myZoomQPixmap, 7, 7 );
 }
 
+QgsMapToolZoom::~QgsMapToolZoom()
+{
+  delete mRubberBand;
+}
+
 
 void QgsMapToolZoom::canvasMoveEvent( QMouseEvent * e )
 {
@@ -44,12 +49,16 @@ void QgsMapToolZoom::canvasMoveEvent( QMouseEvent * e )
   if ( !mDragging )
   {
     mDragging = true;
-    mRubberBand = new QRubberBand( QRubberBand::Rectangle, mCanvas );
+    delete mRubberBand;
+    mRubberBand = new QgsRubberBand( mCanvas, true );
     mZoomRect.setTopLeft( e->pos() );
   }
   mZoomRect.setBottomRight( e->pos() );
-  mRubberBand->setGeometry( mZoomRect.normalized() );
-  mRubberBand->show();
+  if ( mRubberBand )
+  {
+    mRubberBand->setToCanvasRectangle( mZoomRect );
+    mRubberBand->show();
+  }
 }
 
 
@@ -126,3 +135,9 @@ void QgsMapToolZoom::canvasReleaseEvent( QMouseEvent * e )
     mCanvas->zoomWithCenter( e->x(), e->y(), !mZoomOut );
   }
 }
+
+void QgsMapToolZoom::deactivate()
+{
+  delete mRubberBand;
+  mRubberBand = 0;
+}

src/gui/qgsmaptoolzoom.h

@@ -20,8 +20,7 @@
 #include "qgsmaptool.h"
 #include <QRect>
 
-
-class QRubberBand;
+class QgsRubberBand;
 
 /** \ingroup gui
  * A map tool for zooming into the map.
@@ -33,6 +32,8 @@ class GUI_EXPORT QgsMapToolZoom : public QgsMapTool
     //! constructor
     QgsMapToolZoom( QgsMapCanvas* canvas, bool zoomOut );
 
+    ~QgsMapToolZoom();
+
     //! Overridden mouse move event
     virtual void canvasMoveEvent( QMouseEvent * e );
 
@@ -44,6 +45,8 @@ class GUI_EXPORT QgsMapToolZoom : public QgsMapTool
 
     virtual bool isTransient() { return true; }
 
+    virtual void deactivate();
+
   protected:
     //! stores actual zoom rect
     QRect mZoomRect;
@@ -54,8 +57,7 @@ class GUI_EXPORT QgsMapToolZoom : public QgsMapTool
     //! Flag to indicate a map canvas drag operation is taking place
     bool mDragging;
 
-    //! TODO: to be changed to a canvas item
-    QRubberBand* mRubberBand;
+    QgsRubberBand* mRubberBand;
 };
 
 #endif

src/gui/qgsrubberband.cpp

@@ -341,6 +341,24 @@ void QgsRubberBand::addGeometry( QgsGeometry* geom, QgsVectorLayer* layer )
   update();
 }
 
+void QgsRubberBand::setToCanvasRectangle( const QRect& rect )
+{
+  if ( !mMapCanvas )
+  {
+    return;
+  }
+
+  const QgsMapToPixel* transform = mMapCanvas->getCoordinateTransform();
+  QgsPoint ll = transform->toMapCoordinates( rect.left(), rect.bottom() );
+  QgsPoint ur = transform->toMapCoordinates( rect.right(), rect.top() );
+
+  reset( true );
+  addPoint( ll, false );
+  addPoint( QgsPoint( ur.x(), ll.y() ), false );
+  addPoint( ur, false );
+  addPoint( QgsPoint( ll.x(), ur.y() ), true );
+}
+
 /*!
   Draw the shape in response to an update event.
   */

src/gui/qgsrubberband.h

@@ -61,6 +61,11 @@ class GUI_EXPORT QgsRubberBand: public QgsMapCanvasItem
     */
     void setToGeometry( QgsGeometry* geom, QgsVectorLayer* layer );
 
+    /**Sets this rubber band to a map canvas rectangle
+      @param rect rectangle in canvas coordinates
+      @note added in version 1.7*/
+    void setToCanvasRectangle( const QRect& rect );
+
     /**Add the geometry of an existing feature to a rubberband
      This is useful for multi feature highlighting.
     @param geom the geometry object