/***********************************************************************/
/* stackedlayout.c                                                     */
/*                                                                     */
/* Copyright(C) 2009 Igor Trindade Oliveira <igor.oliveira@indt.org.br>*/
/*                                                                     */
/* This library 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; either	       */
/* version 2.1 of the License, or (at your option) any later version.  */
/*                                                                     */
/* This library 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 library; if not, write to the Free Software */
/* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA       */
/* 02110-1301  USA                                                     */
/***********************************************************************/

#include "stackedlayout.h"

#include <QGraphicsWidget>
#include <QDebug>

StackedLayout::StackedLayout(QGraphicsLayoutItem *parent)
    : QGraphicsLayout(parent), m_currentWidgetIndex(-1)
{
}

StackedLayout::~StackedLayout()
{
}

void StackedLayout::setGeometry(const QRectF &rect)
{
    QGraphicsLayout::setGeometry(rect);

    for(int i = 0; i < items.size(); i++) {
        itemAt(i)->setGeometry(rect);
    }
}

QSizeF StackedLayout::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
{
    Q_UNUSED(which);
    Q_UNUSED(constraint);

    qreal left, top, right, bottom;
    getContentsMargins(&left, &top, &right, &bottom);

    QSizeF currentWidgetSize = itemAt(m_currentWidgetIndex)->effectiveSizeHint(which, constraint);

    return QSizeF( left + right + currentWidgetSize.width(), right + bottom + currentWidgetSize.height());
}

int StackedLayout::count() const
{
    return items.count();
}

QGraphicsLayoutItem *StackedLayout::itemAt(int i) const
{
    return items.at(i);
}

void StackedLayout::insertWidget(QGraphicsLayoutItem *item, int pos)
{
    if(!pos && (m_currentWidgetIndex == -1)) {
        m_currentWidgetIndex = 0;
    } else {
        item->graphicsItem()->hide();
    }

    items.insert(pos, item);
}

void StackedLayout::addWidget(QGraphicsLayoutItem *item)
{
    insertWidget(item, items.size());
}

void StackedLayout::removeAt(int index)
{
    items.removeAt(index);
}

void StackedLayout::setCurrentWidgetIndex(qint32 index)
{
    QGraphicsItem *currentWidget = itemAt(m_currentWidgetIndex)->graphicsItem();
    QGraphicsItem *hidenWidget = itemAt(index)->graphicsItem();

    currentWidget->hide();
    hidenWidget->show();

    m_currentWidgetIndex = index;
}

qint32 StackedLayout::currentWidgetIndex() const
{
    return m_currentWidgetIndex;
}