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

**

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

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the examples of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** 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, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

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

#include <QtGui>

#include "borderlayout.h"

BorderLayout::BorderLayout(QWidget *parent, int margin, int spacing)

    : QLayout(parent)

{

    setMargin(margin);

    setSpacing(spacing);

}

BorderLayout::BorderLayout(int spacing)

{

    setSpacing(spacing);

}

BorderLayout::~BorderLayout()

{

    QLayoutItem *l;

    while ((l = takeAt(0)))

        delete l;

}

void BorderLayout::addItem(QLayoutItem *item)

{

    add(item, West);

}

void BorderLayout::addWidget(QWidget *widget, Position position)

{

    add(new QWidgetItem(widget), position);

}

Qt::Orientations BorderLayout::expandingDirections() const

{

    return Qt::Horizontal | Qt::Vertical;

}

bool BorderLayout::hasHeightForWidth() const

{

    return false;

}

int BorderLayout::count() const

{

    return list.size();

}

QLayoutItem *BorderLayout::itemAt(int index) const

{

    ItemWrapper *wrapper = list.value(index);

    if (wrapper)

        return wrapper->item;

    else

        return 0;

}

QSize BorderLayout::minimumSize() const

{

    return calculateSize(MinimumSize);

}

void BorderLayout::setGeometry(const QRect &rect)

{

    ItemWrapper *center = 0;

    int eastWidth = 0;

    int westWidth = 0;

    int northHeight = 0;

    int southHeight = 0;

    int centerHeight = 0;

    int i;

    QLayout::setGeometry(rect);

    for (i = 0; i < list.size(); ++i) {

        ItemWrapper *wrapper = list.at(i);

        QLayoutItem *item = wrapper->item;

        Position position = wrapper->position;

        if (position == North) {

            item->setGeometry(QRect(rect.x(), northHeight, rect.width(),

                                    item->sizeHint().height()));

            northHeight += item->geometry().height() + spacing();

        } else if (position == South) {

            item->setGeometry(QRect(item->geometry().x(),

                                    item->geometry().y(), rect.width(),

                                    item->sizeHint().height()));

            southHeight += item->geometry().height() + spacing();

            item->setGeometry(QRect(rect.x(),

                              rect.y() + rect.height() - southHeight + spacing(),

                              item->geometry().width(),

                              item->geometry().height()));

        } else if (position == Center) {

            center = wrapper;

        }

    }

    centerHeight = rect.height() - northHeight - southHeight;

    for (i = 0; i < list.size(); ++i) {

        ItemWrapper *wrapper = list.at(i);

        QLayoutItem *item = wrapper->item;

        Position position = wrapper->position;

        if (position == West) {

            item->setGeometry(QRect(rect.x() + westWidth, northHeight,

                                    item->sizeHint().width(), centerHeight));

            westWidth += item->geometry().width() + spacing();

        } else if (position == East) {

            item->setGeometry(QRect(item->geometry().x(), item->geometry().y(),

                                    item->sizeHint().width(), centerHeight));

            eastWidth += item->geometry().width() + spacing();

            item->setGeometry(QRect(

                              rect.x() + rect.width() - eastWidth + spacing(),

                              northHeight, item->geometry().width(),

                              item->geometry().height()));

        }

    }

    if (center)

        center->item->setGeometry(QRect(westWidth, northHeight,

                                        rect.width() - eastWidth - westWidth,

                                        centerHeight));

}

QSize BorderLayout::sizeHint() const

{

    return calculateSize(SizeHint);

}

QLayoutItem *BorderLayout::takeAt(int index)

{

    if (index >= 0 && index < list.size()) {

        ItemWrapper *layoutStruct = list.takeAt(index);

        return layoutStruct->item;

    }

    return 0;

}

void BorderLayout::add(QLayoutItem *item, Position position)

{

    list.append(new ItemWrapper(item, position));

}

QSize BorderLayout::calculateSize(SizeType sizeType) const

{

    QSize totalSize;

    for (int i = 0; i < list.size(); ++i) {

        ItemWrapper *wrapper = list.at(i);

        Position position = wrapper->position;

        QSize itemSize;

        if (sizeType == MinimumSize)

            itemSize = wrapper->item->minimumSize();

        else // (sizeType == SizeHint)

            itemSize = wrapper->item->sizeHint();

        if (position == North || position == South || position == Center)

            totalSize.rheight() += itemSize.height();

        if (position == West || position == East || position == Center)

            totalSize.rwidth() += itemSize.width();

    }

    return totalSize;

}