Improve CmdFeature base class

Add default implementation of isEnabled() and add const

Fwk/AppFwk/cafCommand/cafCmdFeature.cpp

@@ -151,7 +151,7 @@ void CmdFeature::refreshCheckedState()
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------
-bool CmdFeature::canFeatureBeExecuted()
+bool CmdFeature::canFeatureBeExecuted() const
 {
     return this->isCommandEnabled();
 }
@@ -186,7 +186,15 @@ void CmdFeature::actionTriggered( bool isChecked )
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------
-bool CmdFeature::isCommandChecked()
+bool CmdFeature::isCommandEnabled() const
+{
+    return true;
+}
+
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+bool CmdFeature::isCommandChecked() const
 {
     return false;
 }

Fwk/AppFwk/cafCommand/cafCmdFeature.h

@@ -84,7 +84,7 @@ public:
     void     refreshEnabledState();
     void     refreshCheckedState();
 
-    bool canFeatureBeExecuted();
+    bool canFeatureBeExecuted() const;
 
     static void applyShortcutWithHintToAction( QAction* action, const QKeySequence& keySequence );
 
@@ -94,8 +94,8 @@ public slots:
 protected:
     virtual void onActionTriggered( bool isChecked )       = 0;
     virtual void setupActionLook( QAction* actionToSetup ) = 0;
-    virtual bool isCommandEnabled()                        = 0;
-    virtual bool isCommandChecked();
+    virtual bool isCommandEnabled() const;
+    virtual bool isCommandChecked() const;
 
     void           disableModelChangeContribution();
     const QVariant userData() const;