plasma-framework/animator.h

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/*
* Copyright 2007 Aaron Seigo <aseigo@kde.org>
* 2007 Alexis Ménard <darktears31@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as
* published by the Free Software Foundation; either version 2, or
* (at your option) any later version.
*
* This program 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 General Public License for more details
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef PLASMA_ANIMATOR_H
#define PLASMA_ANIMATOR_H
#include <QtGui/QImage>
#include <QtCore/QObject>
#include <plasma/plasma_export.h>
class QGraphicsItem;
class QTimeLine;
namespace Plasma
{
class AnimatorPrivate;
/**
* @short A system for applying effects to Plasma elements
*/
class PLASMA_EXPORT Animator : public QObject
{
Q_OBJECT
Q_ENUMS( Animation )
Q_ENUMS( CurveShape )
Q_ENUMS( Movement )
public:
enum Animation
{
AppearAnimation = 0 /*<< Animate the appearance of an element */,
DisappearAnimation /*<< Animate the disappearance of an element */,
ActivateAnimation /*<< When something is activated or launched, such as an app icon being clicked */
};
enum CurveShape
{
EaseInCurve = 0,
EaseOutCurve,
EaseInOutCurve,
LinearCurve
};
enum Movement
{
SlideInMovement = 0,
SlideOutMovement,
FastSlideInMovement,
FastSlideOutMovement
};
/**
* Singleton accessor
**/
static Animator* self();
/**
* Starts a standard animation on a QGraphicsItem.
*
* @arg item the item to animate in some fashion
* @arg anim the the type of animation to perform
* @return the id of the animation
**/
Q_INVOKABLE int animateItem(QGraphicsItem* item, Animation anim);
/**
* Stops an item animation before the animation is complete.
* Note that it is not necessary to call
* this on normal completion of the animation.
*
* @arg id the id of the animation as returned by animateItem
*/
Q_INVOKABLE void stopItemAnimation(int id);
/**
* Starts a standard animation on a QGraphicsItem.
*
* @arg item the item to animate in some fashion
* @arg anim the the type of animation to perform
* @return the id of the animation
**/
Q_INVOKABLE int moveItem(QGraphicsItem* item, Movement movement, const QPoint &destination);
/**
* Stops an item movement before the animation is complete.
* Note that it is not necessary to call
* this on normal completion of the animation.
*
* @arg id the id of the animation as returned by moveItem
*/
Q_INVOKABLE void stopItemMovement(int id);
/**
* Starts a custom animation, preventing the need to create a timeline
* with its own timer tick.
*
* @arg frames the number of frames this animation should persist for
* @arg duration the length, in milliseconds, the animation will take
* @arg curve the curve applied to the frame rate
* @arg receive the object that will handle the actual animation
* @arg method the method name of slot to be invoked on each update.
* It must take a qreal. So if the slot is animate(qreal),
* pass in "animate" as the method parameter.
* It has an optional integer paramenter that takes an
* integer that reapresents the animation id, useful if
* you want to manage multiple animations with a sigle slot
*
* @return an id that can be used to identify this animation.
*/
Q_INVOKABLE int customAnimation(int frames, int duration, Animator::CurveShape curve,
QObject* receiver, const char* method);
/**
* Stops a custom animation. Note that it is not necessary to call
* this on object destruction, as custom animations associated with
* a given QObject are cleaned up automatically on QObject destruction.
*
* @arg id the id of the animation as returned by customAnimation
*/
Q_INVOKABLE void stopCustomAnimation(int id);
Q_INVOKABLE int animateElement(QGraphicsItem *obj, Animation);
Q_INVOKABLE void stopElementAnimation(int id);
Q_INVOKABLE void setInitialPixmap(int id, const QPixmap &pixmap);
Q_INVOKABLE QPixmap currentPixmap(int id);
/**
* Can be used to query if there are other animations happening. This way
* heavy operations can be delayed until all animations are finished.
* @return true if there are animations going on.
* @since 4.1
*/
Q_INVOKABLE bool isAnimating() const;
Q_SIGNALS:
void animationFinished(QGraphicsItem *item, Plasma::Animator::Animation anim);
void movementFinished(QGraphicsItem *item);
void elementAnimationFinished(int id);
void customAnimationFinished(int id);
protected:
void timerEvent(QTimerEvent *event);
private:
friend class AnimatorSingleton;
explicit Animator(QObject * parent = 0);
~Animator();
Q_PRIVATE_SLOT(d, void animatedItemDestroyed(QObject*))
Q_PRIVATE_SLOT(d, void movingItemDestroyed(QObject*))
Q_PRIVATE_SLOT(d, void animatedElementDestroyed(QObject*))
Q_PRIVATE_SLOT(d, void customAnimReceiverDestroyed(QObject*))
AnimatorPrivate * const d;
};
} // namespace Plasma
#endif