139 lines
4.3 KiB
C++
139 lines
4.3 KiB
C++
/***************************************************************************
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* Copyright 2009 by Alessandro Diaferia <alediaferia@gmail.com> *
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* Copyright 2009 by Marco Martin <notmart@gmail.com> *
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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 General Public License *
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* 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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#ifndef ITEMBACKGROUND_H
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#define ITEMBACKGROUND_H
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#include <QtGui/QGraphicsWidget>
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#include <plasma/plasma_export.h>
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/**
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* @class ItemBackground plasma/widgets/itembackground.h
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*
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* @short a background for QGraphicsWidget based item views with animation effects
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*
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* @since 4.4
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*/
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namespace Plasma {
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class FrameSvg;
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class ItemBackgroundPrivate;
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class PLASMA_EXPORT ItemBackground : public QGraphicsWidget
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{
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Q_OBJECT
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Q_PROPERTY(QRectF target READ target WRITE setTarget)
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Q_PROPERTY(QGraphicsItem* targetItem READ targetItem WRITE setTargetItem)
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Q_PROPERTY(qreal animationUpdate READ animationUpdate WRITE setAnimationUpdate)
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public:
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ItemBackground(QGraphicsWidget *parent = 0);
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~ItemBackground();
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/**
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* Sets a new target geometry we want at the end of animation
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*
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* @arg newGeometry the final geometry target
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*/
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void setTarget(const QRectF &newGeometry);
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/**
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* @return the current target rect; may be empty if there is no target currently set
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*/
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QRectF target() const;
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/**
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* set the ItemBackground geometry to be the target geometry, plus the ItemBackground margins
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*/
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void setTargetItem(QGraphicsItem *target);
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/**
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* @return the target item, if any
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*/
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QGraphicsItem *targetItem() const;
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/**
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* @reimp from QGraphicsWidget
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*/
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void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
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Q_SIGNALS:
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/**
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* Emitted when the visual layout and appearance changes. Useful for synchronizing
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* content margins.
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*/
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void appearanceChanged();
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/**
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* Emitted at each animation frame. Useful for synchronizing item animations
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*/
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void animationStep(qreal progress);
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/**
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* Emitted when the target has been reached. Useful to consider this instead of
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* the corresponding hoverEnterEvent;
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*/
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void targetReached(QRectF);
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/**
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* Emitted when the target has been reached. Useful to consider this instead of
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* the corresponding hoverEnterEvent;
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*/
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void targetItemReached(QGraphicsItem *);
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protected:
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/**
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* @reimp from QGraphicsWidget
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*/
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QVariant itemChange(GraphicsItemChange change, const QVariant &value);
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/**
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* @reimp from QObject
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*/
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bool eventFilter(QObject *watched, QEvent *event);
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/**
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* @reimp from QGraphicsItem
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*/
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bool sceneEventFilter(QGraphicsItem *watched, QEvent *event);
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/**
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* @reimp from QGraphicsItem
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*/
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void resizeEvent(QGraphicsSceneResizeEvent *);
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private:
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void setAnimationUpdate(qreal progress);
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qreal animationUpdate() const;
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private:
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Q_PRIVATE_SLOT(d, void targetDestroyed(QObject*))
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Q_PRIVATE_SLOT(d, void frameSvgChanged())
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Q_PRIVATE_SLOT(d, void refreshCurrentTarget())
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friend class ItemBackgroundPrivate;
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ItemBackgroundPrivate * const d;
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};
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}
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#endif
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