/*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2006-2011 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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();

}