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

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

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     ** Contact: Nokia Corporation (qt-info@nokia.com)
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     #include "custompropertyanimation.h"

     // Qt
     #include <QtCore/qdebug.h>

     CustomPropertyAnimation::CustomPropertyAnimation(QObject *parent) :
         QVariantAnimation(parent), animProp(0)
     {
     }

     CustomPropertyAnimation::~CustomPropertyAnimation()
     {
     }

     void CustomPropertyAnimation::setProperty(AbstractProperty *_animProp)
     {
         if (animProp == _animProp)
             return;
         delete animProp;
         animProp = _animProp;
     }

     /*!
         \reimp
      */
     void CustomPropertyAnimation::updateCurrentValue(const QVariant &value)
     {
         if (!animProp || state() == QAbstractAnimation::Stopped)
             return;

         animProp->write(value);
     }

     /*!
         \reimp
     */
     void CustomPropertyAnimation::updateState(QAbstractAnimation::State oldState, QAbstractAnimation::State newState)
     {
         // Initialize start value
         if (oldState == QAbstractAnimation::Stopped) {
             if (!animProp)
                 return;
             QVariant def = animProp->read();
             if (def.isValid()) {
                 const int t = def.userType();
                 KeyValues values = keyValues();
                 //this ensures that all the keyValues are of type t
                 for (int i = 0; i < values.count(); ++i) {
                     QVariantAnimation::KeyValue &pair = values[i];
                     if (pair.second.userType() != t)
                         pair.second.convert(static_cast<QVariant::Type>(t));
                 }
                 //let's now update the key values
                 setKeyValues(values);
             }

             if ((animProp && !startValue().isValid() && currentTime() == 0)
                 || (currentTime() == duration() && currentLoop() == (loopCount() - 1))) {
                     setStartValue(def);
             }
         }

         QVariantAnimation::updateState(oldState, newState);
     }

     #include "moc_custompropertyanimation.cpp"