+
−/*
+
− * Hedgewars, a free turn based strategy game
+
− * Copyright (c) 2004-2012 Andrey Korotaev <unC0Rr@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 <QGraphicsSceneMouseEvent>
+
−#include <QGraphicsPathItem>
+
−#include <QtEndian>
+
−#include <QDebug>
+
−
+
−#include "drawmapscene.h"
+
−
+
−template <class T> T sqr(const T & x)
+
−{
+
−    return x*x;
+
−}
+
−
+
−DrawMapScene::DrawMapScene(QObject *parent) :
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−    QGraphicsScene(parent),
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−    m_pen(Qt::yellow),
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−    m_brush(Qt::yellow),
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−    m_cursor(new QGraphicsEllipseItem(-0.5, -0.5, 1, 1))
+
−{
+
−    setSceneRect(0, 0, 4096, 2048);
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−
+
−    QLinearGradient gradient(0, 0, 0, 2048);
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−    gradient.setColorAt(0, QColor(60, 60, 155));
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−    gradient.setColorAt(1, QColor(155, 155, 60));
+
−
+
−    m_eraser = QBrush(gradient);
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−    setBackgroundBrush(m_eraser);
+
−    m_isErasing = false;
+
−
+
−    m_pen.setWidth(76);
+
−    m_pen.setJoinStyle(Qt::RoundJoin);
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−    m_pen.setCapStyle(Qt::RoundCap);
+
−    m_currPath = 0;
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−
+
−    m_isCursorShown = false;
+
−    m_cursor->setPen(QPen(Qt::green));
+
−    m_cursor->setZValue(1);
+
−    m_cursor->setScale(m_pen.width());
+
−}
+
−
+
−void DrawMapScene::mouseMoveEvent(QGraphicsSceneMouseEvent * mouseEvent)
+
−{
+
−    if(m_currPath && (mouseEvent->buttons() & Qt::LeftButton))
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−    {
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−        QPainterPath path = m_currPath->path();
+
−
+
−        if(mouseEvent->modifiers() & Qt::ControlModifier)
+
−        {
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−            int c = path.elementCount();
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−            QPointF pos = mouseEvent->scenePos();
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−            path.setElementPositionAt(c - 1, pos.x(), pos.y());
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−
+
−        }
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−        else
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−        {
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−            path.lineTo(mouseEvent->scenePos());
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−            paths.first().points.append(mouseEvent->scenePos().toPoint());
+
−        }
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−        m_currPath->setPath(path);
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−
+
−        emit pathChanged();
+
−    }
+
−
+
−    if(!m_isCursorShown)
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−        showCursor();
+
−    m_cursor->setPos(mouseEvent->scenePos());
+
−}
+
−
+
−void DrawMapScene::mousePressEvent(QGraphicsSceneMouseEvent * mouseEvent)
+
−{
+
−    m_currPath = addPath(QPainterPath(), m_pen);
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−
+
−    QPainterPath path = m_currPath->path();
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−    QPointF p = mouseEvent->scenePos();
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−    p += QPointF(0.01, 0.01);
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−    path.moveTo(p);
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−    path.lineTo(mouseEvent->scenePos());
+
−
+
−    PathParams params;
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−    params.width = serializePenWidth(m_pen.width());
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−    params.erasing = m_isErasing;
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−    params.points = QList<QPoint>() << mouseEvent->scenePos().toPoint();
+
−    paths.prepend(params);
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−    m_currPath->setPath(path);
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−
+
−    emit pathChanged();
+
−}
+
−
+
−void DrawMapScene::mouseReleaseEvent(QGraphicsSceneMouseEvent * mouseEvent)
+
−{
+
−    if (m_currPath)
+
−    {
+
−        QPainterPath path = m_currPath->path();
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−        path.lineTo(mouseEvent->scenePos());
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−        paths.first().points.append(mouseEvent->scenePos().toPoint());
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−        m_currPath->setPath(path);
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−
+
−        simplifyLast();
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−
+
−        m_currPath = 0;
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−    }
+
−}
+
−
+
−void DrawMapScene::wheelEvent(QGraphicsSceneWheelEvent * wheelEvent)
+
−{
+
−    if(wheelEvent->delta() > 0 && m_pen.width() < 516)
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−        m_pen.setWidth(m_pen.width() + 10);
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−    else if(wheelEvent->delta() < 0 && m_pen.width() >= 16)
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−        m_pen.setWidth(m_pen.width() - 10);
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−
+
−    m_cursor->setScale(m_pen.width());
+
−
+
−    if(m_currPath)
+
−    {
+
−        m_currPath->setPen(m_pen);
+
−        paths.first().width = serializePenWidth(m_pen.width());
+
−    }
+
−}
+
−
+
−void DrawMapScene::showCursor()
+
−{
+
−    if(!m_isCursorShown)
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−        addItem(m_cursor);
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−
+
−    m_isCursorShown = true;
+
−}
+
−
+
−void DrawMapScene::hideCursor()
+
−{
+
−    if(m_isCursorShown)
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−        removeItem(m_cursor);
+
−
+
−    m_isCursorShown = false;
+
−}
+
−
+
−void DrawMapScene::undo()
+
−{
+
−    // cursor is a part of items()
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−    if(m_isCursorShown)
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−        return;
+
−
+
−    if(items().size())
+
−    {
+
−        removeItem(items().first());
+
−        paths.removeFirst();
+
−
+
−        emit pathChanged();
+
−    }
+
−    else if(oldItems.size())
+
−    {
+
−        while(oldItems.size())
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−            addItem(oldItems.takeFirst());
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−        paths = oldPaths;
+
−
+
−        emit pathChanged();
+
−    }
+
−}
+
−
+
−void DrawMapScene::clearMap()
+
−{
+
−    // cursor is a part of items()
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−    if(m_isCursorShown)
+
−        return;
+
−
+
−    // don't clear if already cleared
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−    if(!items().size())
+
−        return;
+
−
+
−    oldItems.clear();
+
−
+
−    // do this since clear() would _destroy_ all items
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−    while(items().size())
+
−    {
+
−        oldItems.push_front(items().first());
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−        removeItem(items().first());
+
−    }
+
−
+
−    oldPaths = paths;
+
−
+
−    paths.clear();
+
−
+
−    emit pathChanged();
+
−}
+
−
+
−
+
−void DrawMapScene::setErasing(bool erasing)
+
−{
+
−    m_isErasing = erasing;
+
−    if(erasing)
+
−        m_pen.setBrush(m_eraser);
+
−    else
+
−        m_pen.setBrush(m_brush);
+
−}
+
−
+
−QByteArray DrawMapScene::encode()
+
−{
+
−    QByteArray b;
+
−
+
−    for(int i = paths.size() - 1; i >= 0; --i)
+
−    {
+
−        int cnt = 0;
+
−        PathParams params = paths.at(i);
+
−        foreach(QPoint point, params.points)
+
−        {
+
−            qint16 px = qToBigEndian((qint16)point.x());
+
−            qint16 py = qToBigEndian((qint16)point.y());
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−            quint8 flags = 0;
+
−            if(!cnt)
+
−            {
+
−                flags = 0x80 + params.width;
+
−                if(params.erasing) flags |= 0x40;
+
−            }
+
−            b.append((const char *)&px, 2);
+
−            b.append((const char *)&py, 2);
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−            b.append((const char *)&flags, 1);
+
−
+
−            ++cnt;
+
−        }
+
−
+
−    }
+
−
+
−    return b;
+
−}
+
−
+
−void DrawMapScene::decode(QByteArray data)
+
−{
+
−    bool erasing = m_isErasing;
+
−
+
−    oldItems.clear();
+
−    oldPaths.clear();
+
−    clear();
+
−    paths.clear();
+
−
+
−    PathParams params;
+
−
+
−    while(data.size() >= 5)
+
−    {
+
−        qint16 px = qFromBigEndian(*(qint16 *)data.data());
+
−        data.remove(0, 2);
+
−        qint16 py = qFromBigEndian(*(qint16 *)data.data());
+
−        data.remove(0, 2);
+
−        quint8 flags = *(quint8 *)data.data();
+
−        data.remove(0, 1);
+
−
+
−        if(flags & 0x80)
+
−        {
+
−            if(params.points.size())
+
−            {
+
−                addPath(pointsToPath(params.points), m_pen);
+
−
+
−                paths.prepend(params);
+
−
+
−                params.points.clear();
+
−            }
+
−
+
−            quint8 penWidth = flags & 0x3f;
+
−            m_pen.setWidth(deserializePenWidth(penWidth));
+
−            params.erasing = flags & 0x40;
+
−            if(params.erasing)
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−                m_pen.setBrush(m_eraser);
+
−            else
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−                m_pen.setBrush(m_brush);
+
−            params.width = penWidth;
+
−        }
+
−
+
−        params.points.append(QPoint(px, py));
+
−    }
+
−
+
−    if(params.points.size())
+
−    {
+
−        addPath(pointsToPath(params.points), m_pen);
+
−        paths.prepend(params);
+
−    }
+
−
+
−    emit pathChanged();
+
−
+
−    setErasing(erasing);
+
−}
+
−
+
−void DrawMapScene::simplifyLast()
+
−{
+
−    if(!paths.size()) return;
+
−
+
−    QList<QPoint> points = paths.at(0).points;
+
−
+
−    QPoint prevPoint = points.first();
+
−    int i = 1;
+
−    while(i < points.size())
+
−    {
+
−        if( (i != points.size() - 1)
+
−                && (sqr(prevPoint.x() - points[i].x()) + sqr(prevPoint.y() - points[i].y()) < 1000)
+
−          )
+
−            points.removeAt(i);
+
−        else
+
−        {
+
−            prevPoint = points[i];
+
−            ++i;
+
−        }
+
−    }
+
−
+
−    paths[0].points = points;
+
−
+
−
+
−    // redraw path
+
−    {
+
−        QGraphicsPathItem * pathItem = static_cast<QGraphicsPathItem *>(items()[m_isCursorShown ? 1 : 0]);
+
−        pathItem->setPath(pointsToPath(paths[0].points));
+
−    }
+
−
+
−    emit pathChanged();
+
−}
+
−
+
−int DrawMapScene::pointsCount()
+
−{
+
−    int cnt = 0;
+
−    foreach(PathParams p, paths)
+
−        cnt += p.points.size();
+
−
+
−    return cnt;
+
−}
+
−
+
−QPainterPath DrawMapScene::pointsToPath(const QList<QPoint> points)
+
−{
+
−    QPainterPath path;
+
−
+
−    if(points.size())
+
−    {
+
−        QPointF p = points[0] + QPointF(0.01, 0.01);
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−        path.moveTo(p);
+
−
+
−        foreach(QPoint p, points)
+
−        path.lineTo(p);
+
−    }
+
−
+
−    return path;
+
−}
+
−
+
−quint8 DrawMapScene::serializePenWidth(int width)
+
−{
+
−    return (width - 6) / 10;
+
−}
+
−
+
−int DrawMapScene::deserializePenWidth(quint8 width)
+
−{
+
−    return width * 10 + 6;
+
−}