overlaylayer.h

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/* @@@LICENSE
*
*      Copyright (c) 2011-2012 Hewlett-Packard Development Company, L.P.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* LICENSE@@@ */




#ifndef OVERLAYLAYER_H_
#define OVERLAYLAYER_H_

#include "thingpaintable.h"

#include <QPointer>

class PixmapObject;

namespace OverlayLayerMode
{
        enum Enum
        {
                INVALID,
                Scrim,
                OverlayShadows
        };
}

class OverlayLayer : public ThingPaintable
{
        Q_OBJECT
        Q_PROPERTY(int mode READ mode WRITE setMode)

public:
        OverlayLayer(const QRectF& geometry);
        virtual ~OverlayLayer();

        //these are done separately from the ctor because they will access the parentObject (the launcher)
        // to get the correct positions of the shadows
        // this is a little more convenient than having to constantly pass launcherobject into each constructed child element
        // or having to call the "primary instance singleton" getter of launcherobject
        // Thus, the correct sequence of initializing overlaylayer is:
        // obj = new OverlayLayer
        // obj->setParentItem(launcherobj)
        // obj->setTabBarShadow
        // obj->setQuickLaunchShadow
        void    setTabBarShadow(PixmapObject * p_shadowPmo);
        void    setQuickLaunchShadow(PixmapObject * p_shadowPmo);

        virtual int mode() const;
        virtual void setMode(int v);

        virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,QWidget *widget);
        virtual void paintOffscreen(QPainter *painter);

        virtual bool resize(const QSize& newSize);
        virtual bool resize(quint32 newWidth,quint32 newHeight);

        void recomputeShadowPositions();

protected:

        void recomputeTabBarShadowPosition();
        void recomputeQuickLaunchShadowPosition();

protected:

        OverlayLayerMode::Enum m_mode;
        QPointer<PixmapObject> m_qp_tabBarShadow;
        QRectF m_tabBarShadowArea;
        QPointer<PixmapObject> m_qp_quickLaunchShadow;
        QRectF m_quickLaunchShadowArea;
};

#endif /* OVERLAYLAYER_H_ */