/*

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

* All rights reserved.

*

* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU Lesser General Public License as published by

* the Free Software Foundation, version 2.1 of the License.

*

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

* GNU Lesser General Public License for more details.

*

* You should have received a copy of the GNU Lesser General Public License

* along with this program.  If not,

* see "http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html/".

*

* Description:

*

*/

#ifndef __GINEBRA_CHROMESNIPPET_H__

#define __GINEBRA_CHROMESNIPPET_H__

#include <QString>

#include <QObject>

#include <QTransform>

#include <QWebElement>

#include "ChromeWidget.h"

#include "ChromeLayout.h"

class QGraphicsWidget;

namespace GVA {

  class VisibilityAnimator;

  /*! \ingroup JavascriptAPI

   * \brief This class encapsulates an element of the browser's chrome.

   *

   * Example HTML declaration of a snippet.

   * \code

   *   <div class = "GinebraSnippet" id="StatusBarChromeId" name="statusbar" data-GinebraAnchor="AnchorTop" data-GinebraVisible="true">

   *     <link rel="stylesheet" id="CSSLink" type="text/css" href="statusbar.snippet/statusbar.css"/>

   *     <script type="text/javascript">

   *       new StatusBar();

   *     </script>

   *   </div>

   * \endcode

   * Example javascript code to toggle the visibility of the snippet defined ablove:

   * \code

   * snippets.StatusBarChromeId.toggleVisibility();

   * \endcode

   */

  class ChromeSnippet : public QObject

  {

    Q_OBJECT

  public:

    ChromeSnippet(const QString & elementId, ChromeWidget * chrome, QGraphicsWidget * widget, const QWebElement & element);

    virtual ~ChromeSnippet();

    ChromeWidget * chrome() { return m_chrome; }

    void setInitiallyVisible(bool initiallyVisible) { m_initiallyVisible = initiallyVisible; } //NB: needed?

    void setHidesContent(bool hidesContent) { m_hidesContent = hidesContent; }

    void setAnchor(ChromeAnchor anchor) {m_anchor = anchor;}

    ChromeAnchor anchor() { return m_anchor; }

    int anchorOffset() {return m_anchorOffset;}

    bool initiallyVisible() { return m_initiallyVisible; } //NB: needed?

    bool hidesContent() { return m_hidesContent; }

    QString elementId() { return m_elementId; }

    QGraphicsWidget* widget() { return m_widget; }

    QGraphicsWidget const * constWidget() const { return m_widget; }

    virtual void setChromeWidget(QGraphicsWidget * widget);

    QString parentId() { return m_parentId; }

    void setParentId(const QString& parent) { m_parentId = parent; }

    void setTransform(QTransform transform);

    QTransform transform();

    QPointF position() const;

    virtual void addChild(ChromeSnippet * child);

    QWebElement element() {return m_element;}

    void dump();

    void addLink(ChromeSnippet*);

    ChromeSnippet * linkedSnippet() {return m_link;}

  public slots:

    void setAnchor(const QString& anchor, bool update = true);

    void setAnchorOffset(int offset, bool update = true);

    virtual void toggleVisibility(bool animate = true);

    virtual void setVisible(bool visiblity, bool animate = true);

    void show(bool animate = true) { setVisible(true, animate);}

    virtual void hide(bool animate = true) { setVisible(false, animate);}

    void setOpacity(qreal opacity);

    qreal opacity();

    void setEffect(const QString & effect);

    void enableEffect(bool enable);

    void toggleEffect();

    QObject *setVisibilityAnimator(const QString& animator);

    void visibilityFinished(bool visiblity);

    void moveBy(int dx, int dy);

    void anchorTo(const QString & id, int x = 0, int y = 0);

    void unAnchor();

    void anchorToView(const QString& view, const QString& where="top");

    void detachFromView(const QString& view, const QString& where="top");

    QObject * getGeometry() const;

    QObject * getPosition() const;

    void setPosition(int x, int y);

    QObject * childGeometry(const QString id) const;

    QObject * animate(int duration);

    bool isVisible() { return m_visible; }

    bool isHiding() { return m_hiding; }

    int zValue();

    void setZValue(int z);

    //NB: deprecate repaint: if this is needed, then there are bugs that are preventing updates

    void repaint() { m_widget->update(); }

    void onContextMenuEvent(QGraphicsSceneContextMenuEvent * ev);

  signals:

    void hidden();

    void shown();

    void externalMouseEvent(

            QEvent * ev,

            const QString & name,

            const QString & description);

    void contextMenuEvent(int x, int y);

    void snippetMouseEvent(QEvent::Type );

  protected slots:

    virtual void positionChildren();

  private slots:

    void onChromeComplete();

  public:

    Q_PROPERTY(QString id READ getId)

    QString getId() const { return m_elementId; }

    Q_PROPERTY(bool visible READ isVisible)

    Q_PROPERTY(bool hiding READ isHiding)

    Q_PROPERTY(QString anchor READ getAnchorString)

    QString getAnchorString();

    Q_PROPERTY(int anchorOffset READ anchorOffset WRITE setAnchorOffset)

    Q_PROPERTY(int zValue READ zValue WRITE setZValue)

    Q_PROPERTY(qreal opacity READ opacity WRITE setOpacity)

    Q_PROPERTY(QObject* position READ getPosition)

    Q_PROPERTY(QObject* geometry READ getGeometry)

    Q_PROPERTY(bool enabled WRITE setEnabled READ enabled)

    bool enabled() const;

    void setEnabled(bool value);

  protected:

    QString m_elementId;

    QWebElement m_element;

    QString m_parentId;

    ChromeWidget * m_chrome;

    QGraphicsWidget * m_widget; //Take ownership

    bool m_initiallyVisible; //NB: needed ?

    bool m_visible;

    bool m_hidesContent;

    ChromeAnchor m_anchor;

    int m_anchorOffset;

    VisibilityAnimator * m_vAnimator;

    QGraphicsEffect * m_effect;

    bool m_hiding;

    bool m_dontshowFlag;

    bool m_enabled;

    ChromeSnippet* m_link;

  };

} // end of namespace GVA

#endif // __GINEBRA_CHROMESNIPPET_H__