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#include <QDebug>
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#include <QGraphicsSceneMouseEvent>
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#include <QGraphicsPathItem>
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#include <QtEndian>
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#include "drawmapscene.h"
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template <class T> T sqr(const T & x)
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{
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return x*x;
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}
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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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{
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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));
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setBackgroundBrush(QBrush(gradient));
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m_pen.setWidth(67);
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m_pen.setJoinStyle(Qt::RoundJoin);
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m_pen.setCapStyle(Qt::RoundCap);
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m_currPath = 0;
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}
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void DrawMapScene::mouseMoveEvent(QGraphicsSceneMouseEvent * mouseEvent)
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{
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qDebug() << "move" << mouseEvent->scenePos();
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if(m_currPath && (mouseEvent->buttons() & Qt::LeftButton))
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{
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QPainterPath path = m_currPath->path();
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path.lineTo(mouseEvent->scenePos());
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paths.last().append(mouseEvent->scenePos().toPoint());
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m_currPath->setPath(path);
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emit pathChanged();
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}
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}
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void DrawMapScene::mousePressEvent(QGraphicsSceneMouseEvent * mouseEvent)
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{
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qDebug() << "press" << mouseEvent->scenePos();
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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());
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paths.append(QList<QPoint>() << mouseEvent->scenePos().toPoint());
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m_currPath->setPath(path);
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emit pathChanged();
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}
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void DrawMapScene::mouseReleaseEvent(QGraphicsSceneMouseEvent * mouseEvent)
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{
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qDebug() << "release" << mouseEvent->scenePos();
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m_currPath = 0;
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}
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void DrawMapScene::undo()
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{
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if(items().size())
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{
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removeItem(items().first());
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paths.removeLast();
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emit pathChanged();
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}
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}
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QByteArray DrawMapScene::encode()
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{
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QByteArray b;
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foreach(QList<QPoint> points, paths)
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{
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int cnt = 0;
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foreach(QPoint point, points)
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{
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qint16 px = qToBigEndian((qint16)point.x());
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qint16 py = qToBigEndian((qint16)point.y());
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quint8 flags = 2;
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if(cnt) flags |= 0x80;
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b.append((const char *)&flags, 1);
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b.append((const char *)&px, 2);
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b.append((const char *)&py, 2);
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++cnt;
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}
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}
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return b;
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}
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void DrawMapScene::simplify()
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{
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for(int pit = 0; pit < paths.size(); ++pit)
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{
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QList<QPoint> points = paths[pit];
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QPoint prevPoint = points.first();
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int i = 1;
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while(i < points.size())
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{
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if(sqr(prevPoint.x() - points[i].x()) + sqr(prevPoint.y() - points[i].y()) < 1000)
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points.removeAt(i);
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else
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++i;
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}
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paths[pit] = points;
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}
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emit pathChanged();
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}
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