/****************************************************************************

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the QtGui module of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#ifndef QGRAPHICSSCENE_P_H

#define QGRAPHICSSCENE_P_H

//

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt API.  It exists for the convenience

// of other Qt classes.  This header file may change from version to

// version without notice, or even be removed.

//

// We mean it.

//

#include "qgraphicsscene.h"

#if !defined(QT_NO_GRAPHICSVIEW) || (QT_EDITION & QT_MODULE_GRAPHICSVIEW) != QT_MODULE_GRAPHICSVIEW

#include "qgraphicssceneevent.h"

#include "qgraphicsview.h"

#include "qgraphicsview_p.h"

#include "qgraphicsitem_p.h"

#include <private/qobject_p.h>

#include <QtCore/qbitarray.h>

#include <QtCore/qlist.h>

#include <QtCore/qmap.h>

#include <QtCore/qset.h>

#include <QtGui/qfont.h>

#include <QtGui/qpalette.h>

#include <QtGui/qstyle.h>

#include <QtGui/qstyleoption.h>

QT_BEGIN_NAMESPACE

class QGraphicsSceneIndex;

class QGraphicsView;

class QGraphicsWidget;

class Q_AUTOTEST_EXPORT QGraphicsScenePrivate : public QObjectPrivate

{

    Q_DECLARE_PUBLIC(QGraphicsScene)

public:

    QGraphicsScenePrivate();

    void init();

    static QGraphicsScenePrivate *get(QGraphicsScene *q);

    QGraphicsScene::ItemIndexMethod indexMethod;

    QGraphicsSceneIndex *index;

    int lastItemCount;

    QRectF sceneRect;

    QRectF growingItemsBoundingRect;

    void _q_emitUpdated();

    QList<QRectF> updatedRects;

    QPainterPath selectionArea;

    int selectionChanging;

    QSet<QGraphicsItem *> selectedItems;

    QVector<QGraphicsItem *> unpolishedItems;

    QList<QGraphicsItem *> topLevelItems;

    QMap<QGraphicsItem *, QPointF> movingItemsInitialPositions;

    void registerTopLevelItem(QGraphicsItem *item);

    void unregisterTopLevelItem(QGraphicsItem *item);

    void _q_updateLater();

    void _q_polishItems();

    void _q_processDirtyItems();

    QSet<QGraphicsItem *> scenePosItems;

    void setScenePosItemEnabled(QGraphicsItem *item, bool enabled);

    void registerScenePosItem(QGraphicsItem *item);

    void unregisterScenePosItem(QGraphicsItem *item);

    void _q_updateScenePosDescendants();

    void removeItemHelper(QGraphicsItem *item);

    QBrush backgroundBrush;

    QBrush foregroundBrush;

    QGraphicsItem *focusItem;

    QGraphicsItem *lastFocusItem;

    QGraphicsWidget *tabFocusFirst;

    QGraphicsItem *activePanel;

    QGraphicsItem *lastActivePanel;

    int activationRefCount;

    int childExplicitActivation;

    void setActivePanelHelper(QGraphicsItem *item, bool duringActivationEvent);

    void setFocusItemHelper(QGraphicsItem *item, Qt::FocusReason focusReason);

    QList<QGraphicsWidget *> popupWidgets;

    void addPopup(QGraphicsWidget *widget);

    void removePopup(QGraphicsWidget *widget, bool itemIsDying = false);

    QGraphicsItem *lastMouseGrabberItem;

    QList<QGraphicsItem *> mouseGrabberItems;

    void grabMouse(QGraphicsItem *item, bool implicit = false);

    void ungrabMouse(QGraphicsItem *item, bool itemIsDying = false);

    void clearMouseGrabber();

    QList<QGraphicsItem *> keyboardGrabberItems;

    void grabKeyboard(QGraphicsItem *item);

    void ungrabKeyboard(QGraphicsItem *item, bool itemIsDying = false);

    void clearKeyboardGrabber();

    QGraphicsItem *dragDropItem;

    QGraphicsWidget *enterWidget;

    Qt::DropAction lastDropAction;

    QList<QGraphicsItem *> cachedItemsUnderMouse;

    QList<QGraphicsItem *> hoverItems;

    QPointF lastSceneMousePos;

    void enableMouseTrackingOnViews();

    QMap<Qt::MouseButton, QPointF> mouseGrabberButtonDownPos;

    QMap<Qt::MouseButton, QPointF> mouseGrabberButtonDownScenePos;

    QMap<Qt::MouseButton, QPoint> mouseGrabberButtonDownScreenPos;

    QList<QGraphicsItem *> itemsAtPosition(const QPoint &screenPos,

                                           const QPointF &scenePos,

                                           QWidget *widget) const;

    void storeMouseButtonsForMouseGrabber(QGraphicsSceneMouseEvent *event);

    QList<QGraphicsView *> views;

    void addView(QGraphicsView *view);

    void removeView(QGraphicsView *view);

    QMultiMap<QGraphicsItem *, QGraphicsItem *> sceneEventFilters;

    void installSceneEventFilter(QGraphicsItem *watched, QGraphicsItem *filter);

    void removeSceneEventFilter(QGraphicsItem *watched, QGraphicsItem *filter);

    bool filterDescendantEvent(QGraphicsItem *item, QEvent *event);

    bool filterEvent(QGraphicsItem *item, QEvent *event);

    bool sendEvent(QGraphicsItem *item, QEvent *event);

    bool dispatchHoverEvent(QGraphicsSceneHoverEvent *hoverEvent);

    bool itemAcceptsHoverEvents_helper(const QGraphicsItem *item) const;

    void leaveScene();

    void cloneDragDropEvent(QGraphicsSceneDragDropEvent *dest,

                           QGraphicsSceneDragDropEvent *source);

    void sendDragDropEvent(QGraphicsItem *item,

                           QGraphicsSceneDragDropEvent *dragDropEvent);

    void sendHoverEvent(QEvent::Type type, QGraphicsItem *item,

                        QGraphicsSceneHoverEvent *hoverEvent);

    void sendMouseEvent(QGraphicsSceneMouseEvent *mouseEvent);

    void mousePressEventHandler(QGraphicsSceneMouseEvent *mouseEvent);

    QGraphicsWidget *windowForItem(const QGraphicsItem *item) const;

    void drawItemHelper(QGraphicsItem *item, QPainter *painter,

                        const QStyleOptionGraphicsItem *option, QWidget *widget,

                        bool painterStateProtection);

    void drawItems(QPainter *painter, const QTransform *const viewTransform,

                   QRegion *exposedRegion, QWidget *widget);

    void drawSubtreeRecursive(QGraphicsItem *item, QPainter *painter, const QTransform *const,

                              QRegion *exposedRegion, QWidget *widget, qreal parentOpacity = qreal(1.0),

                              const QTransform *const effectTransform = 0);

    void draw(QGraphicsItem *, QPainter *, const QTransform *const, const QTransform *const,

              QRegion *, QWidget *, qreal, const QTransform *const, bool, bool);

    void markDirty(QGraphicsItem *item, const QRectF &rect = QRectF(), bool invalidateChildren = false,

                   bool force = false, bool ignoreOpacity = false, bool removingItemFromScene = false,

                   bool updateBoundingRect = false);

    void processDirtyItemsRecursive(QGraphicsItem *item, bool dirtyAncestorContainsChildren = false,

                                    qreal parentOpacity = qreal(1.0));

    inline void resetDirtyItem(QGraphicsItem *item, bool recursive = false)

    {

        Q_ASSERT(item);

        item->d_ptr->dirty = 0;

        item->d_ptr->paintedViewBoundingRectsNeedRepaint = 0;

        item->d_ptr->geometryChanged = 0;

        if (!item->d_ptr->dirtyChildren)

            recursive = false;

        item->d_ptr->dirtyChildren = 0;

        item->d_ptr->needsRepaint = QRectF();

        item->d_ptr->allChildrenDirty = 0;

        item->d_ptr->fullUpdatePending = 0;

        item->d_ptr->ignoreVisible = 0;

        item->d_ptr->ignoreOpacity = 0;

#ifndef QT_NO_GRAPHICSEFFECT

        QGraphicsEffect::ChangeFlags flags;

        if (item->d_ptr->notifyBoundingRectChanged) {

            flags |= QGraphicsEffect::SourceBoundingRectChanged;

            item->d_ptr->notifyBoundingRectChanged = 0;

        }

        if (item->d_ptr->notifyInvalidated) {

            flags |= QGraphicsEffect::SourceInvalidated;

            item->d_ptr->notifyInvalidated = 0;

        }

#endif //QT_NO_GRAPHICSEFFECT

        if (recursive) {

            for (int i = 0; i < item->d_ptr->children.size(); ++i)

                resetDirtyItem(item->d_ptr->children.at(i), recursive);

        }

#ifndef QT_NO_GRAPHICSEFFECT

        if (flags && item->d_ptr->graphicsEffect)

            item->d_ptr->graphicsEffect->sourceChanged(flags);

#endif //QT_NO_GRAPHICSEFFECT

    }

    inline void ensureSortedTopLevelItems()

    {

        if (needSortTopLevelItems) {

            qSort(topLevelItems.begin(), topLevelItems.end(), qt_notclosestLeaf);

            topLevelSequentialOrdering = false;

            needSortTopLevelItems = false;

        }

    }

    void ensureSequentialTopLevelSiblingIndexes();

    QStyle *style;

    QFont font;

    void setFont_helper(const QFont &font);

    void resolveFont();

    void updateFont(const QFont &font);

    QPalette palette;

    void setPalette_helper(const QPalette &palette);

    void resolvePalette();

    void updatePalette(const QPalette &palette);

    QStyleOptionGraphicsItem styleOptionTmp;

    QMap<int, QTouchEvent::TouchPoint> sceneCurrentTouchPoints;

    QMap<int, QGraphicsItem *> itemForTouchPointId;

    static void updateTouchPointsForItem(QGraphicsItem *item, QTouchEvent *touchEvent);

    int findClosestTouchPointId(const QPointF &scenePos);

    void touchEventHandler(QTouchEvent *touchEvent);

    bool sendTouchBeginEvent(QGraphicsItem *item, QTouchEvent *touchEvent);

    void enableTouchEventsOnViews();

    QHash<QGesture *, QGraphicsObject *> gestureTargets;

    void gestureEventHandler(QGestureEvent *event);

    void updateInputMethodSensitivityInViews();

    QList<QGraphicsItem *> modalPanels;

    void enterModal(QGraphicsItem *item,

                    QGraphicsItem::PanelModality panelModality = QGraphicsItem::NonModal);

    void leaveModal(QGraphicsItem *item);

};

// QRectF::intersects() returns false always if either the source or target

// rectangle's width or height are 0. This works around that problem.

static inline void _q_adjustRect(QRectF *rect)

{

    Q_ASSERT(rect);

    if (!rect->width())

        rect->adjust(qreal(-0.00001), 0, qreal(0.00001), 0);

    if (!rect->height())

        rect->adjust(0, qreal(-0.00001), 0, qreal(0.00001));

}

static inline QRectF adjustedItemBoundingRect(const QGraphicsItem *item)

{

    Q_ASSERT(item);

    QRectF boundingRect(item->boundingRect());

    _q_adjustRect(&boundingRect);

    return boundingRect;

}

static inline QRectF adjustedItemEffectiveBoundingRect(const QGraphicsItem *item)

{

    Q_ASSERT(item);

    QRectF boundingRect(QGraphicsItemPrivate::get(item)->effectiveBoundingRect());

    _q_adjustRect(&boundingRect);

    return boundingRect;

}

QT_END_NAMESPACE

#endif // QT_NO_GRAPHICSVIEW

#endif