src/gui/graphicsview/qgraphicsview_p.h
author Alex Gilkes <alex.gilkes@nokia.com>
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/****************************************************************************
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**
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the QtGui module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file.  Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights.  These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QGRAPHICSVIEW_P_H
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#define QGRAPHICSVIEW_P_H
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//
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//  W A R N I N G
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//  -------------
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//
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// This file is not part of the Qt API.  It exists for the convenience
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// of other Qt classes.  This header file may change from version to
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// version without notice, or even be removed.
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//
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// We mean it.
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//
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#include "qgraphicsview.h"
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#if !defined(QT_NO_GRAPHICSVIEW) || (QT_EDITION & QT_MODULE_GRAPHICSVIEW) != QT_MODULE_GRAPHICSVIEW
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#include <QtGui/qevent.h>
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#include <QtCore/qcoreapplication.h>
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#include "qgraphicssceneevent.h"
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#include <QtGui/qstyleoption.h>
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#include <private/qabstractscrollarea_p.h>
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QT_BEGIN_NAMESPACE
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class Q_AUTOTEST_EXPORT QGraphicsViewPrivate : public QAbstractScrollAreaPrivate
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{
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    Q_DECLARE_PUBLIC(QGraphicsView)
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public:
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    QGraphicsViewPrivate();
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    void recalculateContentSize();
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    void centerView(QGraphicsView::ViewportAnchor anchor);
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    QPainter::RenderHints renderHints;
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    QGraphicsView::DragMode dragMode;
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    bool sceneInteractionAllowed;
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    QRectF sceneRect;
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    bool hasSceneRect;
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    void updateLastCenterPoint();
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    bool connectedToScene;
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    qint64 horizontalScroll() const;
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    qint64 verticalScroll() const;
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    QPointF mousePressItemPoint;
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    QPointF mousePressScenePoint;
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    QPoint mousePressViewPoint;
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    QPoint mousePressScreenPoint;
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    QPointF lastMouseMoveScenePoint;
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    QPoint lastMouseMoveScreenPoint;
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    QPoint dirtyScrollOffset;
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    Qt::MouseButton mousePressButton;
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    QTransform matrix;
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    bool identityMatrix;
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    qint64 scrollX, scrollY;
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    bool dirtyScroll;
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    void updateScroll();
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    bool accelerateScrolling;
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    qreal leftIndent;
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    qreal topIndent;
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    // Replaying mouse events
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    QMouseEvent lastMouseEvent;
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    bool useLastMouseEvent;
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    void replayLastMouseEvent();
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    void storeMouseEvent(QMouseEvent *event);
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    void mouseMoveEventHandler(QMouseEvent *event);
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    QPointF lastCenterPoint;
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    bool keepLastCenterPoint;
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    Qt::Alignment alignment;
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    bool transforming;
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    QGraphicsView::ViewportAnchor transformationAnchor;
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    QGraphicsView::ViewportAnchor resizeAnchor;
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    QGraphicsView::ViewportUpdateMode viewportUpdateMode;
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    QGraphicsView::OptimizationFlags optimizationFlags;
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    QPointer<QGraphicsScene> scene;
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#ifndef QT_NO_RUBBERBAND
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    QRect rubberBandRect;
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    QRegion rubberBandRegion(const QWidget *widget, const QRect &rect) const;
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    bool rubberBanding;
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    Qt::ItemSelectionMode rubberBandSelectionMode;
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#endif
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    bool handScrolling;
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    int handScrollMotions;
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    QGraphicsView::CacheMode cacheMode;
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    QVector<QStyleOptionGraphicsItem> styleOptions;
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    bool mustAllocateStyleOptions;
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    QStyleOptionGraphicsItem *allocStyleOptionsArray(int numItems);
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    void freeStyleOptionsArray(QStyleOptionGraphicsItem *array);
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    QBrush backgroundBrush;
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    QBrush foregroundBrush;
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    QPixmap backgroundPixmap;
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    bool mustResizeBackgroundPixmap;
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    QRegion backgroundPixmapExposed;
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#ifndef QT_NO_CURSOR
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    QCursor originalCursor;
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    bool hasStoredOriginalCursor;
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    void _q_setViewportCursor(const QCursor &cursor);
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    void _q_unsetViewportCursor();
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#endif
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    QGraphicsSceneDragDropEvent *lastDragDropEvent;
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    void storeDragDropEvent(const QGraphicsSceneDragDropEvent *event);
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    void populateSceneDragDropEvent(QGraphicsSceneDragDropEvent *dest,
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                                    QDropEvent *source);
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    QRect mapToViewRect(const QGraphicsItem *item, const QRectF &rect) const;
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    QRegion mapToViewRegion(const QGraphicsItem *item, const QRectF &rect) const;
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    bool fullUpdatePending;
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    QRegion dirtyRegion;
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    QRect dirtyBoundingRect;
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    void processPendingUpdates();
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    inline void updateAll()
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    {
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        viewport->update();
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        fullUpdatePending = true;
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        dirtyBoundingRect = QRect();
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        dirtyRegion = QRegion();
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    }
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    inline void dispatchPendingUpdateRequests()
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    {
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        if (qt_widget_private(viewport)->paintOnScreen())
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            QCoreApplication::sendPostedEvents(viewport, QEvent::UpdateRequest);
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        else
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            QCoreApplication::sendPostedEvents(viewport->window(), QEvent::UpdateRequest);
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    }
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    bool updateRect(const QRect &rect);
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    bool updateRegion(const QRegion &region);
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    bool updateSceneSlotReimplementedChecked;
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    QRegion exposedRegion;
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    QList<QGraphicsItem *> findItems(const QRegion &exposedRegion, bool *allItems,
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                                     const QTransform &viewTransform) const;
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    QPointF mapToScene(const QPointF &point) const;
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    QRectF mapToScene(const QRectF &rect) const;
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    static void translateTouchEvent(QGraphicsViewPrivate *d, QTouchEvent *touchEvent);
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    void updateInputMethodSensitivity();
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};
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QT_END_NAMESPACE
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#endif // QT_NO_GRAPHICSVIEW
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#endif