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/****************************************************************************
**
** Copyright (C) 2009 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.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 QMLGRAPHICSLAYOUTS_H
#define QMLGRAPHICSLAYOUTS_H
#include <QtCore/QObject>
#include <QtCore/QString>
#include <qmlgraphicsitem.h>
#include <private/qmlstate_p.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
QT_MODULE(Declarative)
class QmlGraphicsBasePositionerPrivate;
class Q_DECLARATIVE_EXPORT QmlGraphicsBasePositioner : public QmlGraphicsItem
{
Q_OBJECT
Q_PROPERTY(int spacing READ spacing WRITE setSpacing NOTIFY spacingChanged)
Q_PROPERTY(QmlTransition *move READ move WRITE setMove)
Q_PROPERTY(QmlTransition *add READ add WRITE setAdd)
Q_PROPERTY(QmlTransition *remove READ remove WRITE setRemove)
public:
enum AutoUpdateType { None = 0x0, Horizontal = 0x1, Vertical = 0x2, Both = 0x3 };
QmlGraphicsBasePositioner(AutoUpdateType, QmlGraphicsItem *parent);
int spacing() const;
void setSpacing(int);
QmlTransition *move() const;
void setMove(QmlTransition *);
QmlTransition *add() const;
void setAdd(QmlTransition *);
QmlTransition *remove() const;
void setRemove(QmlTransition *);
protected:
virtual void componentComplete();
virtual QVariant itemChange(GraphicsItemChange, const QVariant &);
virtual bool event(QEvent *);
QSet<QmlGraphicsItem *>* newItems();
QSet<QmlGraphicsItem *>* leavingItems();
QSet<QmlGraphicsItem *>* items();
void applyAdd(const QList<QPair<QString, QVariant> >& changes, QmlGraphicsItem* target);
void applyMove(const QList<QPair<QString, QVariant> >& changes, QmlGraphicsItem* target);
void applyRemove(const QList<QPair<QString, QVariant> >& changes, QmlGraphicsItem* target);
void finishApplyTransitions();
Q_SIGNALS:
void layoutItemChanged();
void spacingChanged();
protected Q_SLOTS:
virtual void doPositioning()=0;
private Q_SLOTS:
void prePositioning();
protected:
QmlGraphicsBasePositioner(QmlGraphicsBasePositionerPrivate &dd, AutoUpdateType at, QmlGraphicsItem *parent);
void setMovingItem(QmlGraphicsItem *);
QList<QmlGraphicsItem *> positionedItems;
private:
void applyTransition(const QList<QPair<QString, QVariant> >& changes, QmlGraphicsItem* target,
QmlStateOperation::ActionList &actions);
Q_DISABLE_COPY(QmlGraphicsBasePositioner)
Q_DECLARE_PRIVATE_D(QGraphicsItem::d_ptr.data(), QmlGraphicsBasePositioner)
};
class Q_DECLARATIVE_EXPORT QmlGraphicsColumn : public QmlGraphicsBasePositioner
{
Q_OBJECT
public:
QmlGraphicsColumn(QmlGraphicsItem *parent=0);
protected Q_SLOTS:
virtual void doPositioning();
private:
Q_DISABLE_COPY(QmlGraphicsColumn)
};
class Q_DECLARATIVE_EXPORT QmlGraphicsRow: public QmlGraphicsBasePositioner
{
Q_OBJECT
public:
QmlGraphicsRow(QmlGraphicsItem *parent=0);
protected Q_SLOTS:
virtual void doPositioning();
private:
Q_DISABLE_COPY(QmlGraphicsRow)
};
class Q_DECLARATIVE_EXPORT QmlGraphicsGrid : public QmlGraphicsBasePositioner
{
Q_OBJECT
Q_PROPERTY(int rows READ rows WRITE setRows)
Q_PROPERTY(int columns READ columns WRITE setcolumns)
public:
QmlGraphicsGrid(QmlGraphicsItem *parent=0);
int rows() const {return _rows;}
void setRows(const int rows){_rows = rows;}
int columns() const {return _columns;}
void setcolumns(const int columns){_columns = columns;}
protected Q_SLOTS:
virtual void doPositioning();
private:
int _rows;
int _columns;
Q_DISABLE_COPY(QmlGraphicsGrid)
};
QT_END_NAMESPACE
QML_DECLARE_TYPE(QmlGraphicsColumn)
QML_DECLARE_TYPE(QmlGraphicsRow)
QML_DECLARE_TYPE(QmlGraphicsGrid)
QT_END_HEADER
#endif
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