Touch Gesture position

src/control/zoom/ZoomControl.cpp

@@ -40,20 +40,16 @@ void ZoomControl::startZoomSequence(double centerX, double centerY)
 {
 	XOJ_CHECK_TYPE(ZoomControl);
 
-	GtkWidget* widget = view->getWidget();
-	Layout* layout = gtk_xournal_get_layout(widget);
-	// Save visible rectangle at beginning of zoom
-	zoomSequenceRectangle = layout->getVisibleRect();
-
-	this->zoomCenterX = centerX - zoomSequenceRectangle.x;
-	this->zoomCenterY = centerY - zoomSequenceRectangle.y;
-
+	zoomSequenceRectangle = getVisibleRect();
 
 	// Scale to 100% zoom
 	zoomSequenceRectangle.x /= this->zoom;
 	zoomSequenceRectangle.y /= this->zoom;
 
 	zoomSequenceStart = this->zoom;
+
+	this->zoomCenterX = centerX;
+	this->zoomCenterY = centerY;
 }
 
 /**
@@ -83,6 +79,16 @@ void ZoomControl::endZoomSequence()
 	zoomCenterY = -1;
 }
 
+/**
+ * Get visible rect on xournal view, for Zoom Gesture
+ */
+Rectangle ZoomControl::getVisibleRect()
+{
+	GtkWidget* widget = view->getWidget();
+	Layout* layout = gtk_xournal_get_layout(widget);
+	return layout->getVisibleRect();
+}
+
 /**
  * Zoom to correct position on zooming
  */

src/control/zoom/ZoomControl.h

@@ -83,6 +83,11 @@ public:
 	 */
 	void scrollToZoomPosition(XojPageView* view);
 
+	/**
+	 * Get visible rect on xournal view, for Zoom Gesture
+	 */
+	Rectangle getVisibleRect();
+
 protected:
 	void fireZoomChanged();
 	void fireZoomRangeValueChanged();

src/control/zoom/ZoomGesture.cpp

@@ -61,7 +61,9 @@ void ZoomGesture::zoomBegin()
 	// get center of bounding box
 	gtk_gesture_get_bounding_box_center(GTK_GESTURE(gesture), &x, &y);
 
-	zoomControl->startZoomSequence(x, y);
+	Rectangle zoomSequenceRectangle = zoomControl->getVisibleRect();
+
+	zoomControl->startZoomSequence(x - zoomSequenceRectangle.x, y - zoomSequenceRectangle.y);
 }
 
 void ZoomGesture::zoomChanged(double zoom)