/*

* 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:

*

*/

#include "WebChromeContainerSnippet.h"

#include "ChromeItem.h"

#include "WebChromeItem.h"

#include "ChromeWidget.h"

#include "ChromeRenderer.h"

#include "ChromeSnippet.h"

#include <QDebug>

namespace GVA {

  WebChromeContainerSnippet::WebChromeContainerSnippet(const QString & elementId, ChromeWidget * chrome, const QWebElement & element)

    : ChromeSnippet(elementId, chrome, 0, element)

      ,m_layoutHeight(0)

  {

    m_layoutWidth = chrome->layout()->size().width();

    //QGraphicsWidget * item = static_cast<QGraphicsWidget*> (widget());

    //NB: maybe size should be fixed only in one direction?

    //item->setSizePolicy(QSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed));

    //NB: add a method for setting owner area

    //item->setPreferredSize(m_ownerArea.width(), m_ownerArea.height());

    //Also resize in case item is not part of anchor layout

    //item->resize(item->preferredSize());

   //NB: Linear layout efaults to horizontal: handle vertical layouts too.

    m_layout = new QGraphicsLinearLayout();

    m_layout->setContentsMargins(0,0,0,0);

    m_layout->setSpacing(0);

    //Add a stretch element at the beginning.

    m_layout->addStretch();

    //item->setLayout(m_layout);

    //When chrome is resized sizes for snippets may change

    QObject::connect(m_chrome->renderer(), SIGNAL(chromeResized()), this, SLOT(updateOwnerArea()));

    QObject::connect(m_chrome, SIGNAL(prepareForSizeChange(QSize)), this, SLOT(updateSize(QSize)));

  }

  WebChromeContainerSnippet::~WebChromeContainerSnippet()

  {

    // delete m_layout;

  }

  void WebChromeContainerSnippet::positionChildren()

  {

    ; //Do nothing since the layout positions children automatically.

  }

  void WebChromeContainerSnippet::setChromeWidget(QGraphicsWidget * widget){

      widget->setSizePolicy(QSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed));

      widget->setLayout(m_layout);

      ChromeSnippet::setChromeWidget(widget);

  }

  void WebChromeContainerSnippet::addChild(ChromeSnippet * child)

  {

    //Prevent layout from stretching the child widgets. NB: Revisit this to make configurable from chrome?

    child->widget()->setSizePolicy(QSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed));

    //child->widget()->setParentItem(this->widget()); // Shouldn't be needed, right?

    m_layout->addItem(child->widget());

    //Add a stretch after each element so the layout looks like this: |stretch|item|stretch|item . . . . stretch|item|

    m_layout->addStretch();

    qreal childHeight = child->widget()->size().height();

    if (childHeight > m_layoutHeight){

      m_layoutHeight = childHeight;

      updateSizes();

    }

    emit childAdded(child);

    m_layout->activate();

  }

  void WebChromeContainerSnippet:: updateOwnerArea()

  {

    updateSizes();

    QObject::disconnect(m_chrome->renderer(), SIGNAL(chromeResized()), this, SLOT(updateOwnerArea()));

  }

  void WebChromeContainerSnippet::setLayoutHeight(int height){

    if (m_layoutHeight != height){

      m_layoutHeight = height;

      updateSizes();

    }

  }

  void WebChromeContainerSnippet::setLayoutWidth(qreal width, bool update){

    if (m_layoutWidth != width){

      m_layoutWidth = width;

      if (update ) {

        updateSizes();

      }

    }

  }

  void WebChromeContainerSnippet::updateSize(QSize size ) {

    Q_UNUSED(size);

    // m_layoutWidth should have been set by now through derived classes. We don't want to set it

    // here as that would overwrite any width set before. For example, width of the middle snippet

    // in toolbar is set by the main toolbar.

    updateSizes();

  }

  void WebChromeContainerSnippet::updateSizes() {

    QGraphicsWidget * item = static_cast<QGraphicsWidget*> (widget());

    //Resize the item

    item->setPreferredSize(m_layoutWidth, m_layoutHeight);

    //Also resize in case item is not part of anchor layout

    item->resize(item->preferredSize());

  }

} // endof namespace GVA