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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 QQUICKITEMVIEW_P_P_H
-#define QQUICKITEMVIEW_P_P_H
-
-#include "qquickitemview_p.h"
-#include "qquickflickable_p_p.h"
-#include "qquickvisualdatamodel_p.h"
-#include <private/qdeclarativechangeset_p.h>
-
-
-QT_BEGIN_HEADER
-
-QT_BEGIN_NAMESPACE
-
-QT_MODULE(Declarative)
-
-class FxViewItem
-{
-public:
- FxViewItem(QQuickItem *, bool own);
- ~FxViewItem();
-
- // these are positions and sizes along the current direction of scrolling/flicking
- virtual qreal position() const = 0;
- virtual qreal endPosition() const = 0;
- virtual qreal size() const = 0;
- virtual qreal sectionSize() const = 0;
-
- virtual bool contains(qreal x, qreal y) const = 0;
-
- QQuickItem *item;
- bool ownItem;
- int index;
- QQuickItemViewAttached *attached;
-};
-
-class QQuickItemViewChangeSet
-{
-public:
- QQuickItemViewChangeSet();
-
- bool hasPendingChanges() const;
- void prepare(int currentIndex, int count);
- void reset();
-
- void applyChanges(const QDeclarativeChangeSet &changeSet);
-
- int itemCount;
- int newCurrentIndex;
- QDeclarativeChangeSet pendingChanges;
- QHash<QDeclarativeChangeSet::MoveKey, FxViewItem *> removedItems;
-
- bool active : 1;
- bool currentChanged : 1;
- bool currentRemoved : 1;
-};
-
-class QQuickItemViewPrivate : public QQuickFlickablePrivate
-{
- Q_DECLARE_PUBLIC(QQuickItemView)
-public:
- QQuickItemViewPrivate();
-
- struct InsertionsResult {
- QList<FxViewItem *> addedItems;
- QList<FxViewItem *> movedBackwards;
- qreal sizeAddedBeforeVisible;
-
- InsertionsResult() : sizeAddedBeforeVisible(0) {}
- };
-
- enum BufferMode { NoBuffer = 0x00, BufferBefore = 0x01, BufferAfter = 0x02 };
- enum MovementReason { Other, SetIndex, Mouse };
-
- bool isValid() const;
- qreal position() const;
- qreal size() const;
- qreal startPosition() const;
- qreal endPosition() const;
- qreal contentStartPosition() const;
- int findLastVisibleIndex(int defaultValue = -1) const;
- FxViewItem *visibleItem(int modelIndex) const;
- FxViewItem *firstVisibleItem() const;
- int mapFromModel(int modelIndex) const;
-
- virtual void init();
- virtual void clear();
- virtual void updateViewport();
-
- void regenerate();
- void layout();
- void refill();
- void refill(qreal from, qreal to, bool doBuffer = false);
- void mirrorChange();
-
- FxViewItem *createItem(int modelIndex, bool asynchronous = false);
- virtual void releaseItem(FxViewItem *item);
-
- QQuickItem *createHighlightItem();
- QQuickItem *createComponentItem(QDeclarativeComponent *component, bool receiveItemGeometryChanges, bool createDefault = false);
-
- void updateCurrent(int modelIndex);
- void updateTrackedItem();
- void updateUnrequestedIndexes();
- void updateUnrequestedPositions();
- void updateVisibleIndex();
- void positionViewAtIndex(int index, int mode);
- void applyPendingChanges();
- bool applyModelChanges();
-
- void checkVisible() const;
-
- void markExtentsDirty() {
- if (layoutOrientation() == Qt::Vertical)
- vData.markExtentsDirty();
- else
- hData.markExtentsDirty();
- }
-
- QDeclarativeGuard<QQuickVisualModel> model;
- QVariant modelVariant;
- int itemCount;
- int buffer;
- int bufferMode;
- Qt::LayoutDirection layoutDirection;
-
- MovementReason moveReason;
-
- QList<FxViewItem *> visibleItems;
- int visibleIndex;
- int currentIndex;
- FxViewItem *currentItem;
- FxViewItem *trackedItem;
- QHash<QQuickItem*,int> unrequestedItems;
- int requestedIndex;
- FxViewItem *requestedItem;
- QQuickItemViewChangeSet currentChanges;
-
- // XXX split into struct
- QDeclarativeComponent *highlightComponent;
- FxViewItem *highlight;
- int highlightRange; // enum value
- qreal highlightRangeStart;
- qreal highlightRangeEnd;
- int highlightMoveDuration;
-
- QDeclarativeComponent *headerComponent;
- FxViewItem *header;
- QDeclarativeComponent *footerComponent;
- FxViewItem *footer;
-
- mutable qreal minExtent;
- mutable qreal maxExtent;
-
- bool ownModel : 1;
- bool wrap : 1;
- bool deferredRelease : 1;
- bool inApplyModelChanges : 1;
- bool inViewportMoved : 1;
- bool forceLayout : 1;
- bool currentIndexCleared : 1;
- bool haveHighlightRange : 1;
- bool autoHighlight : 1;
- bool highlightRangeStartValid : 1;
- bool highlightRangeEndValid : 1;
- bool fillCacheBuffer : 1;
- bool inRequest : 1;
- bool requestedAsync : 1;
-
-protected:
- virtual Qt::Orientation layoutOrientation() const = 0;
- virtual bool isContentFlowReversed() const = 0;
-
- virtual qreal positionAt(int index) const = 0;
- virtual qreal endPositionAt(int index) const = 0;
- virtual qreal originPosition() const = 0;
- virtual qreal lastPosition() const = 0;
-
- virtual qreal headerSize() const = 0;
- virtual qreal footerSize() const = 0;
- virtual bool showHeaderForIndex(int index) const = 0;
- virtual bool showFooterForIndex(int index) const = 0;
- virtual void updateHeader() = 0;
- virtual void updateFooter() = 0;
-
- virtual void createHighlight() = 0;
- virtual void updateHighlight() = 0;
- virtual void resetHighlightPosition() = 0;
-
- virtual void setPosition(qreal pos) = 0;
- virtual void fixupPosition() = 0;
-
- virtual bool addVisibleItems(qreal fillFrom, qreal fillTo, bool doBuffer) = 0;
- virtual bool removeNonVisibleItems(qreal bufferFrom, qreal bufferTo) = 0;
- virtual void visibleItemsChanged() = 0;
-
- virtual FxViewItem *newViewItem(int index, QQuickItem *item) = 0;
- virtual void repositionPackageItemAt(QQuickItem *item, int index) = 0;
- virtual void resetItemPosition(FxViewItem *item, FxViewItem *toItem) = 0;
- virtual void resetFirstItemPosition() = 0;
- virtual void moveItemBy(FxViewItem *item, qreal forwards, qreal backwards) = 0;
-
- virtual void layoutVisibleItems() = 0;
- virtual void changedVisibleIndex(int newIndex) = 0;
- virtual bool applyInsertionChange(const QDeclarativeChangeSet::Insert &, FxViewItem *, InsertionsResult *) = 0;
- virtual bool needsRefillForAddedOrRemovedIndex(int) const { return false; }
-
- virtual void initializeViewItem(FxViewItem *) {}
- virtual void initializeCurrentItem() {}
- virtual void updateSections() {}
-
- virtual void itemGeometryChanged(QQuickItem *item, const QRectF &newGeometry, const QRectF &oldGeometry);
-};
-
-
-QT_END_NAMESPACE
-
-QT_END_HEADER
-
-#endif // QQUICKITEMVIEW_P_P_H
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