/****************************************************************************

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

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** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the QtDeclarative module of the Qt Toolkit.

**

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** 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

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** $QT_END_LICENSE$

**

****************************************************************************/

#ifndef QDECLARATIVECOMPONENT_H

#define QDECLARATIVECOMPONENT_H

#include <QtDeclarative/qdeclarative.h>

#include <QtDeclarative/qdeclarativeerror.h>

#include <QtCore/qobject.h>

#include <QtCore/qstring.h>

#include <QtScript/qscriptvalue.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Declarative)

class QDeclarativeCompiledData;

class QByteArray;

class QDeclarativeComponentPrivate;

class QDeclarativeEngine;

class QDeclarativeComponentAttached;

class Q_DECLARATIVE_EXPORT QDeclarativeComponent : public QObject

{

    Q_OBJECT

    Q_DECLARE_PRIVATE(QDeclarativeComponent)

    Q_PROPERTY(qreal progress READ progress NOTIFY progressChanged)

    Q_PROPERTY(Status status READ status NOTIFY statusChanged)

    Q_PROPERTY(QUrl url READ url CONSTANT)

public:

    QDeclarativeComponent(QObject *parent = 0);

    QDeclarativeComponent(QDeclarativeEngine *, QObject *parent=0);

    QDeclarativeComponent(QDeclarativeEngine *, const QString &fileName, QObject *parent = 0);

    QDeclarativeComponent(QDeclarativeEngine *, const QUrl &url, QObject *parent = 0);

    virtual ~QDeclarativeComponent();

    Q_ENUMS(Status)

    enum Status { Null, Ready, Loading, Error };

    Status status() const;

    bool isNull() const;

    bool isReady() const;

    bool isError() const;

    bool isLoading() const;

    QList<QDeclarativeError> errors() const;

    Q_INVOKABLE QString errorString() const;

    qreal progress() const;

    QUrl url() const;

    virtual QObject *create(QDeclarativeContext *context = 0);

    virtual QObject *beginCreate(QDeclarativeContext *);

    virtual void completeCreate();

    void loadUrl(const QUrl &url);

    void setData(const QByteArray &, const QUrl &baseUrl);

    QDeclarativeContext *creationContext() const;

    static QDeclarativeComponentAttached *qmlAttachedProperties(QObject *);

Q_SIGNALS:

    void statusChanged(QDeclarativeComponent::Status);

    void progressChanged(qreal);

protected:

    QDeclarativeComponent(QDeclarativeComponentPrivate &dd, QObject* parent);

    Q_INVOKABLE QScriptValue createObject(QObject* parent);

private:

    QDeclarativeComponent(QDeclarativeEngine *, QDeclarativeCompiledData *, int, int, QObject *parent);

    Q_DISABLE_COPY(QDeclarativeComponent)

    friend class QDeclarativeVME;

    friend class QDeclarativeCompositeTypeData;

};

QT_END_NAMESPACE

Q_DECLARE_METATYPE(QDeclarativeComponent::Status)

QML_DECLARE_TYPE(QDeclarativeComponent)

QML_DECLARE_TYPEINFO(QDeclarativeComponent, QML_HAS_ATTACHED_PROPERTIES)

QT_END_HEADER

#endif // QDECLARATIVECOMPONENT_H