/* Copyright (C) 2009 Igor Trindade Oliveira <igor.oliveira@indt.org.br> Copyright (C) 2009 Adenilson Cavalcanti <adenilson.silva@idnt.org.br> This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library. If not, see <http://www.gnu.org/licenses/>. */ #ifndef PLASMA_KINETICSCROLLING_H #define PLASMA_KINETICSCROLLING_H class QGraphicsSceneMouseEvent; class QGraphicsWidget; class QGraphicsSceneWheelEvent; class QKeyEvent; #include <QObject> #include <QPointF> #include <QtCore/QAbstractAnimation> namespace Plasma { class KineticScrollingPrivate; class KineticScrolling: public QObject { Q_OBJECT public: KineticScrolling(QGraphicsWidget *parent); ~KineticScrolling(); void setWidget(QGraphicsWidget *parent); void stop(); Q_SIGNALS: void stateChanged(QAbstractAnimation::State newState, QAbstractAnimation::State oldState); protected: void mouseMoveEvent(QGraphicsSceneMouseEvent *event); void mousePressEvent(QGraphicsSceneMouseEvent *event); void mouseReleaseEvent(QGraphicsSceneMouseEvent *event); void wheelReleaseEvent(QGraphicsSceneWheelEvent *event); void keyPressEvent(QKeyEvent *event); private: KineticScrollingPrivate *d; void resetAnimation(QPointF finalPosition, int duration); void setScrollValue(QPointF value); QPointF thresholdPosition(QPointF value) const; void duration(); private Q_SLOTS: void overshoot(); protected: bool eventFilter(QObject *watched, QEvent *event); }; } #endif