From 07db0732edd419a91bc4ddf04c23a4409ee5290b Mon Sep 17 00:00:00 2001
From: Klaus Basan <klaus.basan@klausbasan.de>
Date: Sun, 16 Apr 2017 12:09:36 +0200
Subject: [PATCH] refs #935, showHelp function, so other widgets can invoke
 help

---
 src/blackgui/guiapplication.cpp | 18 +++++++++++-------
 src/blackgui/guiapplication.h   |  3 +++
 2 files changed, 14 insertions(+), 7 deletions(-)

diff --git a/src/blackgui/guiapplication.cpp b/src/blackgui/guiapplication.cpp
index 12f017918..4a544c7bf 100644
--- a/src/blackgui/guiapplication.cpp
+++ b/src/blackgui/guiapplication.cpp
@@ -518,21 +518,25 @@ namespace BlackGui
 
     void CGuiApplication::addMenuHelp(QMenu &menu)
     {
-        QWidget *w = mainApplicationWindow();
+        const QWidget *w = mainApplicationWindow();
         if (!w) { return; }
-
-        const CGlobalSetup gs = this->getGlobalSetup();
-        const CUrl helpPage = gs.getHelpPageUrl();
-        if (helpPage.isEmpty()) { return; }
         QAction *a = menu.addAction(w->style()->standardIcon(QStyle::SP_TitleBarContextHelpButton), "Online help");
-        bool c = connect(a, &QAction::triggered, this, [helpPage]()
+        const bool c = connect(a, &QAction::triggered, this, [this]()
         {
-            QDesktopServices::openUrl(helpPage);
+            this->showHelp();
         });
         Q_ASSERT_X(c, Q_FUNC_INFO, "Connect failed");
         Q_UNUSED(c);
     }
 
+    void CGuiApplication::showHelp()
+    {
+        const CGlobalSetup gs = this->getGlobalSetup();
+        const CUrl helpPage = gs.getHelpPageUrl();
+        if (helpPage.isEmpty()) { return; }
+        QDesktopServices::openUrl(helpPage);
+    }
+
     const CStyleSheetUtility &CGuiApplication::getStyleSheetUtility() const
     {
         return this->m_styleSheetUtility;
diff --git a/src/blackgui/guiapplication.h b/src/blackgui/guiapplication.h
index 81c7ff44a..033373e31 100644
--- a/src/blackgui/guiapplication.h
+++ b/src/blackgui/guiapplication.h
@@ -133,6 +133,9 @@ namespace BlackGui
         //! Help operations
         void addMenuHelp(QMenu &menu);
 
+        //! Show help page (online help)
+        void showHelp();
+
         //! Style sheet handling
         const CStyleSheetUtility &getStyleSheetUtility() const;