text: /****************************************************************************
  **
  ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
  ** Contact: http://www.qt-project.org/legal
  **
  ** This file is part of the QtDeclarative module of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:LGPL$
  ** Commercial License Usage
  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
  ** Software or, alternatively, in accordance with the terms contained in
  ** a written agreement between you and Digia.  For licensing terms and
  ** conditions see http://qt.digia.com/licensing.  For further information
  ** use the contact form at http://qt.digia.com/contact-us.
  **
  ** 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, Digia gives you certain additional
  ** rights.  These rights are described in the Digia 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.
  **
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/
  
  #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_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);
      Q_INVOKABLE Q_REVISION(1) QScriptValue createObject(QObject* parent, const QScriptValue& valuemap); //XXX Versioning
  
  private:
      QDeclarativeComponent(QDeclarativeEngine *, QDeclarativeCompiledData *, int, int, QObject *parent);
  
      Q_DISABLE_COPY(QDeclarativeComponent)
      friend class QDeclarativeVME;
      friend class QDeclarativeCompositeTypeData;
      friend class QDeclarativeTypeData;
  };
  
  QT_END_NAMESPACE
  
  Q_DECLARE_METATYPE(QDeclarativeComponent::Status)
  QML_DECLARE_TYPE(QDeclarativeComponent)
  QML_DECLARE_TYPEINFO(QDeclarativeComponent, QML_HAS_ATTACHED_PROPERTIES)
  
  #endif // QDECLARATIVECOMPONENT_H
  