From ad9ef8bea53b98917c7e4fd7ea518b5a0f91b0c9 Mon Sep 17 00:00:00 2001
From: Stefan Hoops <shoops@copasi.org>
Date: Mon, 30 Jul 2018 14:03:33 -0400
Subject: [PATCH] Bug 2669. Double click switches to the widget of the
 dependent object.

---
 copasi/UI/CQDependencyWidget.cpp | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/copasi/UI/CQDependencyWidget.cpp b/copasi/UI/CQDependencyWidget.cpp
index df1673652f..06f566febf 100644
--- a/copasi/UI/CQDependencyWidget.cpp
+++ b/copasi/UI/CQDependencyWidget.cpp
@@ -12,6 +12,7 @@
 #include <copasi/function/CExpression.h>
 
 #include <copasi/UI/qtUtilities.h>
+#include <copasi/UI/copasiui3window.h>
 
 CQDependencyWidget::CQDependencyWidget(QWidget *parent, const char *name, Qt::WindowFlags f)
   : CopasiWidget(parent, name, f)
@@ -210,7 +211,13 @@ CQDependencyWidget::rowDoubleClicked(int row, int)
 
   if (key.empty()) return;
 
-  if (mpListView == NULL) return;
+  if (mpListView == NULL)
+    {
+      mpListView = CopasiUI3Window::getMainWindow()->getMainWidget();
+    }
 
-  mpListView->switchToOtherWidget(C_INVALID_INDEX, key);
+  if (mpListView != NULL)
+    {
+      mpListView->switchToOtherWidget(C_INVALID_INDEX, key);
+    }
 }