Add zoom reset option to context menus

pv/views/trace/ruler.cpp

@@ -150,6 +150,12 @@ void Ruler::contextMenuEvent(QContextMenuEvent *event)
 
 	QMenu *const menu = new QMenu(this);
 
+    if(view_.scale() != 1e-3) {
+        QAction *const reset_zoom = new QAction(tr("Reset zoom"), this);
+        connect(reset_zoom, SIGNAL(triggered()), this, SLOT(on_zoom_reset()));
+        menu->addAction(reset_zoom);
+    }
+
 	QAction *const create_marker = new QAction(tr("Create marker here"), this);
 	connect(create_marker, SIGNAL(triggered()), this, SLOT(on_createMarker()));
 	menu->addAction(create_marker);
@@ -415,6 +421,11 @@ void Ruler::on_toggleHoverMarker()
 	settings.setValue(GlobalSettings::Key_View_ShowHoverMarker, !state);
 }
 
+void Ruler::on_zoom_reset()
+{
+    view_.reset_zoom();
+}
+
 } // namespace trace
 } // namespace views
 } // namespace pv

pv/views/trace/ruler.hpp

@@ -186,6 +186,7 @@ private Q_SLOTS:
 	void on_setZeroPosition();
 	void on_resetZeroPosition();
 	void on_toggleHoverMarker();
+    void on_zoom_reset();
 
 private:
 	/**

pv/views/trace/tracetreeitem.cpp

@@ -18,6 +18,7 @@
  */
 
 #include <cassert>
+#include <QMenu>
 
 #include "view.hpp"
 
@@ -138,6 +139,30 @@ QPoint TraceTreeItem::drag_point(const QRect &rect) const
 	return QPoint(rect.right(), get_visual_y());
 }
 
+QMenu* TraceTreeItem::create_view_context_menu(QWidget *parent, QPoint &click_pos)
+{
+    (void)click_pos;
+
+    QMenu *const menu = new QMenu(parent);
+
+    View *view = owner_->view();
+
+    if(view->scale() != 1e-3) {
+        QAction *const reset_zoom = new QAction(tr("Reset zoom"), this);
+        connect(reset_zoom, SIGNAL(triggered()), this, SLOT(on_zoom_reset()));
+        menu->addAction(reset_zoom);
+    }
+
+    return menu;
+}
+
+void TraceTreeItem::on_zoom_reset()
+{
+    View *view = owner_->view();
+    assert(view);
+    view->reset_zoom();
+}
+
 } // namespace trace
 } // namespace views
 } // namespace pv

pv/views/trace/tracetreeitem.hpp

@@ -119,6 +119,11 @@ class TraceTreeItem : public ViewItem,
 	 */
 	virtual pair<int, int> v_extents() const = 0;
 
+    virtual QMenu* create_view_context_menu(QWidget *parent, QPoint &click_pos);
+
+private Q_SLOTS:
+    void on_zoom_reset();
+
 protected:
 	TraceTreeItemOwner *owner_;
 

pv/views/trace/view.cpp

@@ -602,6 +602,11 @@ void View::set_offset(const pv::util::Timestamp& offset, bool force_update)
 	}
 }
 
+void View::reset_zoom()
+{
+    set_zoom(1e-3, 0);
+}
+
 const Timestamp& View::offset() const
 {
 	return offset_;

pv/views/trace/view.hpp

@@ -184,6 +184,8 @@ class View : public ViewBase, public TraceTreeItemOwner, public GlobalSettingsIn
 
 	void reset_zero_position();
 
+    void reset_zoom();
+
 	pv::util::Timestamp zero_offset() const;
 
 	/**