100 lines
2.9 KiB
C++
100 lines
2.9 KiB
C++
/*
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* Copyright 2009 Mehmet Ali Akmanalp <makmanalp@wpi.edu>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License as
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* published by the Free Software Foundation; either version 2, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/**
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* @file This file contains the definition for the Fade effect.
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*/
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#ifndef PLASMA_ANIMATIONS_FADE_P_H
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#define PLASMA_ANIMATIONS_FADE_P_H
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#include <plasma/animations/easinganimation_p.h>
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#include <plasma/plasma_export.h>
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namespace Plasma
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{
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/**
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* @class Fade plasma/animations/fade.h
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* @short Fade effect
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*
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* Effect that slowly transforms the opacity of the object from a starting
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* value to a target value. The range is 0 (full translucent) to 1 (full
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* opaque).
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*/
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class FadeAnimation : public EasingAnimation
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{
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Q_OBJECT
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Q_PROPERTY(qreal startOpacity READ startOpacity WRITE setStartOpacity)
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Q_PROPERTY(qreal targetOpacity READ targetOpacity WRITE setTargetOpacity)
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public:
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/** Default constructor */
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explicit FadeAnimation(QObject *parent = 0);
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/** Destructor */
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virtual ~FadeAnimation();
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/**
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* Access start opacity of the target widget.
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*
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* You can set both a start and an end opacity for an widget when
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* using this animation class. See \ref setStartOpacity.
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* @return The opacity (range is 0 to 1).
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*/
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qreal startOpacity() const;
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/**
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* Set the start opacity of the target widget.
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*
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* See also \ref targetOpacity.
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* @param qreal The opacity (range is 0 to 1).
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*/
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void setStartOpacity(qreal);
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/**
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* Access final opacity of the target widget.
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*
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* You can set both a start and an end opacity for an widget when
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* using this animation class. See \ref setTargetOpacity.
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* @return The opacity (range is 0 to 1).
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*/
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qreal targetOpacity() const;
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/**
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* Set the final opacity of the target widget.
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*
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* See also \ref startOpacity.
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* @param qreal The opacity (range is 0 to 1).
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*/
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void setTargetOpacity(qreal);
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protected:
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void updateState(QAbstractAnimation::State newState, QAbstractAnimation::State oldState);
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void updateEffectiveTime(int currentTime);
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private:
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/** Initial opacity */
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qreal m_startOpacity;
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/** Final opacity */
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qreal m_targetOpacity;
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};
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}
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#endif // PLASMA_ANIMATIONS_FADE_P_H
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