X-Git-Url: http://git.code-monkey.de/?a=blobdiff_plain;f=pv%2Fview%2Fviewport.hpp;fp=pv%2Fview%2Fviewport.hpp;h=f43177d2d3f611d9ea00abe87b6eadfbe02ce92e;hb=282905348863fe871a48c680bd12bc1dee364a43;hp=43905337fefaad1c4b78cc6a71ef432212e15c11;hpb=1c91f1a230ac7f61ad0c2ed9718d12514353b629;p=pulseview.git

diff --git a/pv/view/viewport.hpp b/pv/view/viewport.hpp
index 4390533..f43177d 100644
--- a/pv/view/viewport.hpp
+++ b/pv/view/viewport.hpp
@@ -52,6 +52,22 @@ private:
 	std::shared_ptr<pv::view::ViewItem> get_mouse_over_item(
 		const QPoint &pt);
 
+	/**
+	 * Sets this item into the dragged state.
+	 */
+	void drag();
+
+	/**
+	 * Drag the background by the delta offset.
+	 * @param delta the drag offset in pixels.
+	 */
+	void drag_by(const QPoint &delta);
+
+	/**
+	 * Sets this item into the un-dragged state.
+	 */
+	void drag_release();
+
 	/**
 	 * Gets the items in the view widget.
 	 */
@@ -66,15 +82,11 @@ private:
 private:
 	void paintEvent(QPaintEvent *event);
 
-	void mousePressEvent(QMouseEvent *event);
-	void mouseReleaseEvent(QMouseEvent *event);
-	void mouseMoveEvent(QMouseEvent *event);
 	void mouseDoubleClickEvent(QMouseEvent * event);
 	void wheelEvent(QWheelEvent *event);
+
 private:
-	QPoint mouse_down_point_;
-	double mouse_down_offset_;
-	bool mouse_down_valid_;
+	double drag_offset_;
 
 	double pinch_offset0_;
 	double pinch_offset1_;