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/*
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* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:
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*
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*/
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#ifndef HGCONTAINER_H
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#define HGCONTAINER_H
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#include <QTime>
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#include <HbWidget>
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#include <hgwidgets/hgwidgets.h>
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#include "hgmediawalldataprovider.h"
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#include "hgdrag.h"
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#include "hgspring.h"
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class HgWidgetItem;
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class HgQuadRenderer;
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class HgMediaWallRenderer;
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class QPanGesture;
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class HbAbstractViewItem;
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class HbGestureSceneFilter;
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class HgLongPressVisualizer;
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class HgContainer: public HbWidget, public HgMediaWallDataProvider
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{
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Q_OBJECT
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Q_DISABLE_COPY(HgContainer)
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public:
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explicit HgContainer(QGraphicsItem* parent = 0);
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virtual ~HgContainer();
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void setItemCount(int count);
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int itemCount() const;
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int rowCount() const;
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QList<HgWidgetItem*> items() const;
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HgWidgetItem* itemByIndex(const QModelIndex &index) const;
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HgWidgetItem* itemByIndex(const int &index) const;
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void setSelectionModel(QItemSelectionModel *selectionModel, const QModelIndex &defaultItem);
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QItemSelectionModel *selectionModel() const;
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void setSelectionMode(HgWidget::SelectionMode mode, bool resetSelection);
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HgWidget::SelectionMode selectionMode() const;
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void dimensions(qreal &screenSize, qreal &worldSize);
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Qt::Orientation orientation() const;
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void setOrientation(Qt::Orientation orientation, bool animate=true);
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// new size for the widget. calls resize.
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void scrollToPosition(qreal value, bool animate = false);
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virtual void scrollToPosition(const QPointF& pos, bool animate);
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void scrollTo(const QModelIndex &index);
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void itemDataChanged(const QModelIndex &firstIndex, const QModelIndex &lastIndex);
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void addItems(int start, int end);
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void removeItems(int start, int end);
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void moveItems(int start, int end, int destination);
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bool getItemPoints(int index, QPolygonF& points);
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QList<QModelIndex> getVisibleItemIndices() const;
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virtual void itemDataChanged(const int &firstIndex, const int &lastIndex);
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void init(Qt::Orientation scrollDirection);
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void setDefaultImage(QImage defaultImage);
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void setItemSizePolicy(HgWidget::ItemSizePolicy policy);
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HgWidget::ItemSizePolicy itemSizePolicy() const;
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void setItemSize(const QSizeF& size);
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QSizeF itemSize() const;
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void setItemSpacing(const QSizeF& size);
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QSizeF itemSpacing() const;
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Qt::Orientation scrollDirection() const;
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qreal scrollPosition() const;
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void setHandleLongPress(bool handleLongPress);
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signals:
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// emit this signal when scrolling. for example scrollbar can be connected to this signal.
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void scrollPositionChanged(qreal value, bool scrollBarAnimation);
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void centerItemChanged(const QModelIndex &index);
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void activated(const QModelIndex &index);
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void longPressed(const QModelIndex &index, const QPointF &coords);
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void scrollingStarted();
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void scrollingEnded();
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protected slots:
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virtual void onScrollingStarted();
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virtual void onScrollingEnded();
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private slots:
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void updateBySpringPosition();
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void redraw();
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void updateLongPressVisualizer();
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protected: // from HgMediaWallDataProvider
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int imageCount() const;
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const HgImage *image(int index) const;
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int flags(int index) const;
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const HgImage *indicator(int flags);
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protected: // events
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virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
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virtual void resizeEvent(QGraphicsSceneResizeEvent *event);
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// this needs to be implemented for gesture framework to work
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virtual void mousePressEvent(QGraphicsSceneMouseEvent *event);
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// From HbWidget for gestures.
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virtual void gestureEvent(QGestureEvent *event);
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protected:
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virtual HgMediaWallRenderer* createRenderer(Qt::Orientation scrollDirection)=0;
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virtual qreal getCameraDistance(qreal springVelocity);
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virtual qreal getCameraRotationY(qreal springVelocity);
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virtual void handleTapAction(const QPointF& pos, HgWidgetItem* hitItem, int hitItemIndex);
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virtual void handleLongTapAction(const QPointF& pos, HgWidgetItem* hitItem, int hitItemIndex);
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virtual void onScrollPositionChanged(qreal pos);
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virtual void loadIndicatorGraphics(bool loadIfExists = false);
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protected:
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enum ItemActionType
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{
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LongTap = 1,
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DoubleTap,
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NormalTap,
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TapStart,
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LongTapStart
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};
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qreal worldWidth() const;
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void initSpringForScrollBar();
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void initSpringForScrolling();
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void boundSpring();
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bool handlePanning(QPanGesture *gesture);
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bool handleTap(Qt::GestureState state, const QPointF &pos);
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bool handleLongTap(Qt::GestureState state, const QPointF &pos);
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bool handleItemAction(const QPointF &pos, ItemActionType action);
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void selectItem(int index);
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void updateSelectedItem();
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void unselectItem();
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bool hasItemAt(const QPointF& pos);
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HgWidgetItem* getItemAt(const QPointF& pos, int& index);
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void startLongPressWatcher(const QPointF& pos);
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void stopLongPressWatcher();
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bool updateSelectionModel(HgWidgetItem* item);
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virtual void updateItemSizeAndSpacing();
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virtual QSizeF getAutoItemSize() const;
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virtual QSizeF getAutoItemSpacing() const;
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protected: // data
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QList<HgWidgetItem *> mItems;
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//int mRowCount;
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//int mColumnCount;
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//HbLabel *mLabel;
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HgQuadRenderer *mQuadRenderer;
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HgMediaWallRenderer *mRenderer;
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HgSpring mSpring;
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HgDrag mDrag;
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QTime mTapDuration; // Temp hack until HbTapGesture is available
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QTime mDoubleTapDuration;
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int mTapCount;
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bool mAnimateUsingScrollBar;
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HgWidget::SelectionMode mSelectionMode;
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QItemSelectionModel *mSelectionModel;
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HgImage *mMarkImageOn;
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HgImage *mMarkImageOff;
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qreal mSpringVelAtDragStart;
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bool mDragged;
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int mFramesDragged;
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HbAbstractViewItem* mHitItemView;
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QPixmap mHitItemPixmap;
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HgLongPressVisualizer* mLongPressVisualizer;
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QTimer* mLongPressTimer;
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HgWidgetItem* mHitItem;
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int mHitItemIndex;
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QPointF mOffsetAtDragStart;
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QTime mLongTapDuration;
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bool mScrollBarPressed;
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HgWidget::ItemSizePolicy mItemSizePolicy;
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QSizeF mUserItemSize;
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QSizeF mUserItemSpacing;
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Qt::Orientation mOrientation;
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QModelIndex mDelayedScrollToIndex;
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bool mIgnoreGestureAction;
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bool mHandleLongPress;
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};
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#endif
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