Qt 4.6: custompropertyanimation.h Example File (demos/sub-attaq/custompropertyanimation.h)

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# custompropertyanimation.h Example File
demos/sub-attaq/custompropertyanimation.h

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     #ifndef CUSTOMPROPERTYANIMATION_H
     #define CUSTOMPROPERTYANIMATION_H

     #include <QtCore/qvariantanimation.h>

     class QGraphicsItem;

     struct AbstractProperty
     {
         virtual QVariant read() const = 0;
         virtual void write(const QVariant &value) = 0;
     };

     class CustomPropertyAnimation : public QVariantAnimation
     {
         Q_OBJECT

         template <typename Target, typename T, typename T2 = T>
         class MemberFunctionProperty : public AbstractProperty
         {
         public:
             typedef T (Target::*Getter)(void) const;
             typedef void (Target::*Setter)(T2);

             MemberFunctionProperty(Target* target, Getter getter, Setter setter)
                 : m_target(target), m_getter(getter), m_setter(setter) {}

             virtual void write(const QVariant &value)
             {
                 if (m_setter) (m_target->*m_setter)(qVariantValue<T>(value));
             }

             virtual QVariant read() const
             {
                 if (m_getter) return qVariantFromValue<T>((m_target->*m_getter)());
                 return QVariant();
             }

         private:
             Target *m_target;
             Getter m_getter;
             Setter m_setter;
         };

     public:
         CustomPropertyAnimation(QObject *parent = 0);
         ~CustomPropertyAnimation();

         template<class Target, typename T>
         void setMemberFunctions(Target* target, T (Target::*getter)() const, void (Target::*setter)(const T& ))
         {
             setProperty(new MemberFunctionProperty<Target, T, const T&>(target, getter, setter));
         }

         template<class Target, typename T>
         void setMemberFunctions(Target* target, T (Target::*getter)() const, void (Target::*setter)(T))
         {
             setProperty(new MemberFunctionProperty<Target, T>(target, getter, setter));
         }

         void updateCurrentValue(const QVariant &value);
         void updateState(QAbstractAnimation::State oldState, QAbstractAnimation::State newState);
         void setProperty(AbstractProperty *animProp);

     private:
         Q_DISABLE_COPY(CustomPropertyAnimation);
         AbstractProperty *animProp;
     };

     #endif // CUSTOMPROPERTYANIMATION_H