/*
 * Copyright 2008 Ben Boeckel <MathStuf@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, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * 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, see <http://www.gnu.org/licenses/>.
 */

// Header include
#include "WarpItem.h"

// Sigmod includes
#include "../sigmod/MapWarp.h"
#include "../sigmod/Sigmod.h"

// KDE includes
#include <KColorScheme>

// Qt includes
#include <QtGui/QGraphicsSceneMouseEvent>
#include <QtGui/QPainter>
#include <QtGui/QStyle>
#include <QtGui/QStyleOptionGraphicsItem>

Sigmodr::WarpItem::WarpItem(Sigmod::MapWarp* warp, QObject* parent) :
        QObject(parent),
        m_warp(warp)
{
    connect(m_warp, SIGNAL(changed()), this, SLOT(warpChanged()));
    warpChanged();
    setZValue(INT_MAX);
    setAcceptHoverEvents(true);
}

QRectF Sigmodr::WarpItem::boundingRect() const
{
    return m_warp->area();
}

void Sigmodr::WarpItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
{
    Q_UNUSED(widget)
    if (m_warp->area().size().isValid())
        return;
    if (!(flags() & QGraphicsItem::ItemIsSelectable))
    {
        QPixmap temp(m_warp->area().size());
        temp.fill(Qt::transparent);
        QPainter p;
        p.begin(&temp);
        p.setCompositionMode(QPainter::CompositionMode_DestinationIn);
        p.fillRect(temp.rect(), QColor(0, 0, 0, 127));
        p.end();
        painter->drawPixmap(0, 0, temp);
    }
    painter->setBrush(KStatefulBrush(KColorScheme::View, KColorScheme::ActiveBackground).brush(QPalette::Active));
    painter->drawRect(m_warp->area());
    if (option->state & QStyle::State_MouseOver)
    {
        painter->setPen(QPen(KStatefulBrush(KColorScheme::View, (flags() & QGraphicsItem::ItemIsSelectable) ? KColorScheme::ActiveText : KColorScheme::InactiveText).brush((flags() & QGraphicsItem::ItemIsSelectable) ? QPalette::Active : QPalette::Inactive), 1));
        painter->drawText(m_warp->area(), Qt::AlignHCenter | Qt::AlignVCenter, m_warp->name());
    }
    if (option->state & QStyle::State_HasFocus)
    {
        painter->setPen(QPen(KStatefulBrush(KColorScheme::Selection, KColorScheme::FocusColor).brush(QPalette::Active), 6));
        painter->drawRect(m_warp->area());
    }
    else if (option->state & QStyle::State_Selected)
    {
        painter->setPen(QPen(KStatefulBrush(KColorScheme::Selection, KColorScheme::ActiveBackground).brush(QPalette::Active), 6));
        painter->drawRect(m_warp->area());
    }
    else if ((option->state & QStyle::State_MouseOver) && (flags() & QGraphicsItem::ItemIsSelectable))
    {
        painter->setPen(QPen(KStatefulBrush(KColorScheme::Selection, KColorScheme::HoverColor).brush(QPalette::Active), 6));
        painter->drawRect(m_warp->area());
    }
}

void Sigmodr::WarpItem::mousePressEvent(QGraphicsSceneMouseEvent* event)
{
    QGraphicsItem::mousePressEvent(event);
    update();
}

void Sigmodr::WarpItem::mouseMoveEvent(QGraphicsSceneMouseEvent* event)
{
    if (event->modifiers() & Qt::ShiftModifier)
    {
        QRect rect = m_warp->area();
        QPointF diff = event->scenePos() - event->lastScenePos();
        rect.setSize(rect.size() + QSize(diff.x(), diff.y()));
        m_warp->setArea(rect);
    }
    else
    {
        QGraphicsItem::mouseMoveEvent(event);
        QRect rect = m_warp->area();
        rect.setTopLeft(scenePos().toPoint());
        m_warp->setArea(rect);
    }
}

void Sigmodr::WarpItem::mouseReleaseEvent(QGraphicsSceneMouseEvent* event)
{
    QGraphicsItem::mouseReleaseEvent(event);
    update();
}

void Sigmodr::WarpItem::warpChanged()
{
    setPos(m_warp->area().topLeft());
    update();
}