Add ability to set user defined toggle view action (#562)

Co-authored-by: Harbinder Saggu <harbinder.saggu@safe.com>

Author: uggas

src/DockWidget.cpp

@@ -364,6 +364,20 @@ CDockWidget::~CDockWidget()
 	delete d;
 }
 
+//============================================================================
+void CDockWidget::setToggleViewAction(QAction* action)
+{
+	if (!action)
+	{
+		return;
+	}
+
+	d->ToggleViewAction->setParent(nullptr);
+	delete d->ToggleViewAction;
+	d->ToggleViewAction = action;
+	d->ToggleViewAction->setParent(this);
+	connect(d->ToggleViewAction, &QAction::triggered, this, &CDockWidget::toggleView);
+}
 
 //============================================================================
 void CDockWidget::setToggleViewActionChecked(bool Checked)

src/DockWidget.h

@@ -409,6 +409,12 @@ private Q_SLOTS:
      */
     QAction* toggleViewAction() const;
 
+    /**
+     * Use provided action to be the default toggle view action for this dock widget.
+     * This dock widget now owns the action.
+     */
+    void setToggleViewAction(QAction* action);
+
     /**
      * Configures the behavior of the toggle view action.
      * \see eToggleViewActionMode for a detailed description