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-/****************************************************************************
-**
-** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
-** All rights reserved.
-** Contact: Nokia Corporation (qt-info@nokia.com)
-**
-** This file is part of the QtDeclarative module of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL$
-** GNU Lesser General Public License Usage
-** 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.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU General
-** Public License version 3.0 as published by the Free Software Foundation
-** and appearing in the file LICENSE.GPL included in the packaging of this
-** file. Please review the following information to ensure the GNU General
-** Public License version 3.0 requirements will be met:
-** http://www.gnu.org/copyleft/gpl.html.
-**
-** Other Usage
-** Alternatively, this file may be used in accordance with the terms and
-** conditions contained in a signed written agreement between you and Nokia.
-**
-**
-**
-**
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef QDECLARATIVEFLICKABLE_P_H
-#define QDECLARATIVEFLICKABLE_P_H
-
-//
-// W A R N I N G
-// -------------
-//
-// This file is not part of the Qt API. It exists purely as an
-// implementation detail. This header file may change from version to
-// version without notice, or even be removed.
-//
-// We mean it.
-//
-
-#include "private/qdeclarativeflickable_p.h"
-
-#include "private/qdeclarativeitem_p.h"
-#include "private/qdeclarativeitemchangelistener_p.h"
-
-#include <qdeclarative.h>
-#include <qdeclarativetimeline_p_p.h>
-#include <qdeclarativeanimation_p_p.h>
-
-#include <qdatetime.h>
-
-QT_BEGIN_NAMESPACE
-
-// Really slow flicks can be annoying.
-const qreal MinimumFlickVelocity = 75.0;
-
-class QDeclarativeFlickableVisibleArea;
-class QDeclarativeFlickablePrivate : public QDeclarativeItemPrivate, public QDeclarativeItemChangeListener
-{
- Q_DECLARE_PUBLIC(QDeclarativeFlickable)
-
-public:
- QDeclarativeFlickablePrivate();
- void init();
-
- struct Velocity : public QDeclarativeTimeLineValue
- {
- Velocity(QDeclarativeFlickablePrivate *p)
- : parent(p) {}
- virtual void setValue(qreal v) {
- if (v != value()) {
- QDeclarativeTimeLineValue::setValue(v);
- parent->updateVelocity();
- }
- }
- QDeclarativeFlickablePrivate *parent;
- };
-
- struct AxisData {
- AxisData(QDeclarativeFlickablePrivate *fp, void (QDeclarativeFlickablePrivate::*func)(qreal))
- : move(fp, func), viewSize(-1), smoothVelocity(fp), atEnd(false), atBeginning(true)
- , fixingUp(false), inOvershoot(false)
- {}
-
- void reset() {
- velocityBuffer.clear();
- dragStartOffset = 0;
- fixingUp = false;
- inOvershoot = false;
- }
-
- void addVelocitySample(qreal v, qreal maxVelocity);
- void updateVelocity();
-
- QDeclarativeTimeLineValueProxy<QDeclarativeFlickablePrivate> move;
- qreal viewSize;
- qreal pressPos;
- qreal dragStartOffset;
- qreal dragMinBound;
- qreal dragMaxBound;
- qreal velocity;
- qreal flickTarget;
- QDeclarativeFlickablePrivate::Velocity smoothVelocity;
- QPODVector<qreal,10> velocityBuffer;
- bool atEnd : 1;
- bool atBeginning : 1;
- bool fixingUp : 1;
- bool inOvershoot : 1;
- };
-
- void flickX(qreal velocity);
- void flickY(qreal velocity);
- virtual void flick(AxisData &data, qreal minExtent, qreal maxExtent, qreal vSize,
- QDeclarativeTimeLineCallback::Callback fixupCallback, qreal velocity);
-
- void fixupX();
- void fixupY();
- virtual void fixup(AxisData &data, qreal minExtent, qreal maxExtent);
-
- void updateBeginningEnd();
-
- bool isOutermostPressDelay() const;
- void captureDelayedPress(QGraphicsSceneMouseEvent *event);
- void clearDelayedPress();
-
- void setRoundedViewportX(qreal x);
- void setRoundedViewportY(qreal y);
-
- qreal overShootDistance(qreal size);
-
- void itemGeometryChanged(QDeclarativeItem *, const QRectF &, const QRectF &);
-
-public:
- QDeclarativeItem *contentItem;
-
- AxisData hData;
- AxisData vData;
-
- QDeclarativeTimeLine timeline;
- bool flickingHorizontally : 1;
- bool flickingVertically : 1;
- bool hMoved : 1;
- bool vMoved : 1;
- bool movingHorizontally : 1;
- bool movingVertically : 1;
- bool stealMouse : 1;
- bool pressed : 1;
- bool interactive : 1;
- bool calcVelocity : 1;
- QElapsedTimer lastPosTime;
- QPointF lastPos;
- QPointF pressPos;
- QElapsedTimer pressTime;
- qreal deceleration;
- qreal maxVelocity;
- QElapsedTimer velocityTime;
- QPointF lastFlickablePosition;
- qreal reportedVelocitySmoothing;
- QGraphicsSceneMouseEvent *delayedPressEvent;
- QGraphicsItem *delayedPressTarget;
- QBasicTimer delayedPressTimer;
- int pressDelay;
- int fixupDuration;
-
- enum FixupMode { Normal, Immediate, ExtentChanged };
- FixupMode fixupMode;
-
- static void fixupY_callback(void *);
- static void fixupX_callback(void *);
-
- void updateVelocity();
- int vTime;
- QDeclarativeTimeLine velocityTimeline;
- QDeclarativeFlickableVisibleArea *visibleArea;
- QDeclarativeFlickable::FlickableDirection flickableDirection;
- QDeclarativeFlickable::BoundsBehavior boundsBehavior;
-
- void handleMousePressEvent(QGraphicsSceneMouseEvent *);
- void handleMouseMoveEvent(QGraphicsSceneMouseEvent *);
- void handleMouseReleaseEvent(QGraphicsSceneMouseEvent *);
-
- // flickableData property
- static void data_append(QDeclarativeListProperty<QObject> *, QObject *);
- static int data_count(QDeclarativeListProperty<QObject> *);
- static QObject *data_at(QDeclarativeListProperty<QObject> *, int);
- static void data_clear(QDeclarativeListProperty<QObject> *);
-};
-
-class QDeclarativeFlickableVisibleArea : public QObject
-{
- Q_OBJECT
-
- Q_PROPERTY(qreal xPosition READ xPosition NOTIFY xPositionChanged)
- Q_PROPERTY(qreal yPosition READ yPosition NOTIFY yPositionChanged)
- Q_PROPERTY(qreal widthRatio READ widthRatio NOTIFY widthRatioChanged)
- Q_PROPERTY(qreal heightRatio READ heightRatio NOTIFY heightRatioChanged)
-
-public:
- QDeclarativeFlickableVisibleArea(QDeclarativeFlickable *parent=0);
-
- qreal xPosition() const;
- qreal widthRatio() const;
- qreal yPosition() const;
- qreal heightRatio() const;
-
- void updateVisible();
-
-signals:
- void xPositionChanged(qreal xPosition);
- void yPositionChanged(qreal yPosition);
- void widthRatioChanged(qreal widthRatio);
- void heightRatioChanged(qreal heightRatio);
-
-private:
- QDeclarativeFlickable *flickable;
- qreal m_xPosition;
- qreal m_widthRatio;
- qreal m_yPosition;
- qreal m_heightRatio;
-};
-
-QT_END_NAMESPACE
-
-QML_DECLARE_TYPE(QDeclarativeFlickableVisibleArea)
-
-#endif
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