refs #325, name variant pair allows test for existing values

* equal value updates can be skipped
* equalsQVariant in CValueObject
* resizing parameter for views

src/blackmisc/namevariantpairlist.cpp

@@ -27,7 +27,7 @@ namespace BlackMisc
     /*
      * Name contained?
      */
-    bool CNameVariantPairList::containsName(const QString &name)
+    bool CNameVariantPairList::containsName(const QString &name)const
     {
         return this->contains(&CNameVariantPair::getName, name);
     }
@@ -35,7 +35,7 @@ namespace BlackMisc
     /*
      * Name index
      */
-    int CNameVariantPairList::getNameRowIndex(const QString &name)
+    int CNameVariantPairList::getNameRowIndex(const QString &name) const
     {
         for (int i = 0; i < this->size(); i++)
         {

src/blackmisc/namevariantpairlist.h

@@ -30,11 +30,11 @@ namespace BlackMisc
         //! Construct from a base class object.
         CNameVariantPairList(const CSequence<CNameVariantPair> &other);
 
-        //! Contains name
-        bool containsName(const QString &name);
-
         //! Get name index
-        int getNameRowIndex(const QString &name);
+        int getNameRowIndex(const QString &name) const;
+
+        //! Contains name
+        bool containsName(const QString &name) const;
 
         //! \copydoc CValueObject::toQVariant
         virtual QVariant toQVariant() const override { return QVariant::fromValue(*this); }

src/blackmisc/valueobject.cpp

@@ -172,6 +172,14 @@ namespace BlackMisc
         return changed;
     }
 
+    /*
+     * equals QVariant?
+     */
+    bool CValueObject::equalsQVariant(const QVariant &qVariant) const
+    {
+        return BlackMisc::equalQVariants(this->toQVariant(), qVariant);
+    }
+
     /*
      * Icon
      */

src/blackmisc/valueobject.h

@@ -195,6 +195,9 @@ namespace BlackMisc
         //! Virtual method to return CVariant
         virtual CVariant toCVariant() const { return CVariant(this->toQVariant()); }
 
+        //! Equals another CValueObject in QVariant?
+        virtual bool equalsQVariant(const QVariant &qVariant) const;
+
         //! Set from QVariant
         virtual void convertFromQVariant(const QVariant &variant) = 0;