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

#ifndef QMLCOMPONENT_H
#define QMLCOMPONENT_H

#include <QtCore/qobject.h>
#include <QtCore/qstring.h>
#include <QtScript/qscriptvalue.h>
#include <qml.h>
#include <qmlerror.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Declarative)

class QmlCompiledData;
class QByteArray;
class QmlComponentPrivate;
class QmlEngine;
class QmlComponentAttached;
class Q_DECLARATIVE_EXPORT QmlComponent : public QObject
{
    Q_OBJECT
    Q_DECLARE_PRIVATE(QmlComponent)
    Q_PROPERTY(bool isNull READ isNull NOTIFY statusChanged)
    Q_PROPERTY(bool isReady READ isReady NOTIFY statusChanged)
    Q_PROPERTY(bool isError READ isError NOTIFY statusChanged)
    Q_PROPERTY(bool isLoading READ isLoading NOTIFY statusChanged)

public:
    QmlComponent(QObject *parent = 0);
    QmlComponent(QmlEngine *, QObject *parent=0);
    QmlComponent(QmlEngine *, const QString &url, QObject *parent = 0);
    QmlComponent(QmlEngine *, const QUrl &url, QObject *parent = 0);
    QmlComponent(QmlEngine *, const QByteArray &data, 
                 const QUrl &baseUrl, QObject *parent=0);
    virtual ~QmlComponent();

    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<QmlError> errors() const;
    Q_INVOKABLE QString errorsString() const;

    qreal progress() const;

    QUrl url() const;

    virtual QObject *create(QmlContext *context = 0);
    virtual QObject *beginCreate(QmlContext *);
    virtual void completeCreate();

    Q_INVOKABLE QScriptValue createObject();

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

    void setCreationContext(QmlContext*);
    QmlContext *creationContext() const;

    static QmlComponentAttached *qmlAttachedProperties(QObject *);

Q_SIGNALS:
    void statusChanged(QmlComponent::Status);
    void progressChanged(qreal);

protected:
    QmlComponent(QmlComponentPrivate &dd, QObject* parent);

private:
    QmlComponent(QmlEngine *, QmlCompiledData *, int, int, QObject *parent);

    friend class QmlVME;
    friend class QmlCompositeTypeData;
};

QT_END_NAMESPACE

Q_DECLARE_METATYPE(QmlComponent::Status)
QML_DECLARE_TYPE(QmlComponent)
QML_DECLARE_TYPEINFO(QmlComponent, QML_HAS_ATTACHED_PROPERTIES)

QT_END_HEADER

#endif // QMLCOMPONENT_H