/*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2006-2012 Igor Ulyanov <iulyanov@gmail.com>

 *

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

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

 * the Free Software Foundation; version 2 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 General Public License for more details.

 *

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

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 */

#include "itemNum.h"

#include "hwform.h"

#include <QMouseEvent>

#include <QPainter>

ItemNum::ItemNum(const QImage& im, const QImage& img, QWidget * parent, unsigned char min, unsigned char max) :

    QFrame(parent), m_im(im), m_img(img), infinityState(false), nonInteractive(false), minItems(min), maxItems(max),

    numItems(min+2 >= max ? min : min+2)

{

    enabled = true;

    //if(frontendEffects) setAttribute(Qt::WA_PaintOnScreen, true);

}

ItemNum::~ItemNum()

{

}

void ItemNum::mousePressEvent ( QMouseEvent * event )

{

    if(nonInteractive) return;

    if(event->button()==Qt::LeftButton && enabled)

    {

        event->accept();

        if((infinityState && numItems <= maxItems) || (!infinityState && numItems < maxItems))

        {

            incItems();

        }

        else

        {

            numItems = minItems+1;

            // appears there's an emit in there

            decItems();

        }

    }

    else if (event->button()==Qt::RightButton && enabled)

    {

        event->accept();

        if(numItems > minItems)

        {

            decItems();

        }

        else

        {

            numItems = maxItems+(infinityState?0:-1);

            incItems();

        }

    }

    else

    {

        event->ignore();

        return;

    }

    repaint();

}

void ItemNum::wheelEvent ( QWheelEvent * event )

{

    if (nonInteractive) return;

    if (!enabled)

    {

        event->ignore();

        return;

    }

    event->accept();

    bool up = (event->delta() > 0); // positive delta is up, negative is down

    // negative delta on horizontal wheel is not left, but right

    if (event->orientation() == Qt::Horizontal)

        up = !up;

    if(up)

    {

        if((infinityState && numItems <= maxItems) || (!infinityState && numItems < maxItems))

            incItems();

    }

    else

    {

        if(numItems > minItems)

            decItems();

    }

    repaint();

}

QSize ItemNum::sizeHint () const

{

    return QSize((maxItems+1)*12, 32);

}

void ItemNum::paintEvent(QPaintEvent* event)

{

    Q_UNUSED(event);

    QPainter painter(this);

    if (numItems==maxItems+1)

    {

        QRect target(0, 0, 100, 32);

        if (enabled)

        {

            painter.drawImage(target, QImage(":/res/infinity.png"));

        }

        else

        {

            painter.drawImage(target, QImage(":/res/infinitygrey.png"));

        }

    }

    else

    {

        for(int i=0; i<numItems; i++)

        {

            QRect target(11 * i, i % 2, 25, 35);

            if (enabled)

            {

                painter.drawImage(target, m_im);

            }

            else

            {

                painter.drawImage(target, m_img);

            }

        }

    }

}

unsigned char ItemNum::getItemsNum() const

{

    return numItems;

}

void ItemNum::setItemsNum(const unsigned char num)

{

    numItems=num;

    repaint();

}

void ItemNum::setInfinityState(bool value)

{

    infinityState=value;

}

void ItemNum::setEnabled(bool value)

{

    enabled=value;

    repaint();

}