refs #661, info in context menu when force reload is unavailable

(KB/RW slack discussion)

src/blackgui/components/dbownmodelscomponent.cpp

@@ -233,6 +233,7 @@ namespace BlackGui
                 }
 
                 // with models loaded I allow a refresh reload
+                // I need those models because I want to merge with DM data in the loader
                 if (sGui->getWebDataServices() && sGui->getWebDataServices()->getModelsCount() > 0)
                 {
                     if (this->m_reloadActions.isEmpty()) { this->m_reloadActions = QList<QAction *>({nullptr, nullptr, nullptr, nullptr}); }
@@ -290,6 +291,12 @@ namespace BlackGui
                         menuActions.addAction(this->m_reloadActions[3], CMenuAction::pathSimulatorModelsReload());
                     }
                 }
+                else
+                {
+                    // dummy action grayed out
+                    CMenuAction a = menuActions.addAction(CIcons::refresh16(), "Force model reload impossible, no DB data", CMenuAction::pathSimulator());
+                    a.setActionEnabled(false); // gray out
+                }
             }
             this->nestedCustomMenu(menuActions);
         }

src/blackgui/menus/menuaction.cpp

@@ -48,6 +48,17 @@ namespace BlackGui
             if (this->m_action) { m_action->setChecked(checked); }
         }
 
+        bool CMenuAction::isActionEnabled() const
+        {
+            if (!this->m_action) { return false; }
+            return this->m_action->isEnabled();
+        }
+
+        void CMenuAction::setActionEnabled(bool enabled)
+        {
+            if (this->m_action) { m_action->setEnabled(enabled); }
+        }
+
         bool CMenuAction::hasNoPathWithSeparator() const
         {
             return this->m_separator && this->hasNoPath();
@@ -244,6 +255,11 @@ namespace BlackGui
             return action;
         }
 
+        CMenuAction CMenuActions::addAction(const QIcon &actionIcon, const QString &text, const QString &path)
+        {
+            return this->addAction(actionIcon, text, path, nullptr);
+        }
+
         CMenuAction CMenuActions::addAction(const QIcon &actionIcon, const QString &text, const QString &path, const BlackMisc::CSlot<void ()> &slot, const QKeySequence &shortcut)
         {
             return this->addAction(actionIcon, text, path, slot.object(), slot, shortcut);

src/blackgui/menus/menuaction.h

@@ -60,6 +60,12 @@ namespace BlackGui
             //! Set a checkable action, QAction::setChecked
             void setActionChecked(bool checked);
 
+            //! Enabled action?
+            bool isActionEnabled() const;
+
+            //! Enable action (allow gray out)
+            void setActionEnabled(bool enabled);
+
             //! Path
             const QString &getPath() const  { return m_path; }
 
@@ -241,6 +247,9 @@ namespace BlackGui
             //! Add action
             CMenuAction addAction(const QIcon &actionIcon, const QString &text, const QString &path, QObject *actionOwner, const BlackMisc::CSlot<void()> &slot, const QKeySequence &shortcut = 0);
 
+            //! Add action without slot
+            CMenuAction addAction(const QIcon &actionIcon, const QString &text, const QString &path);
+
             //! Add action
             CMenuAction addAction(const QIcon &actionIcon, const QString &text, const QString &path, const BlackMisc::CSlot<void()> &slot, const QKeySequence &shortcut = 0);