mirror of
https://github.com/tumic0/GPXSee.git
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178 lines
3.5 KiB
C++
178 lines
3.5 KiB
C++
#include <cmath>
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#include <QApplication>
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#include <QCursor>
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#include <QPainter>
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#include "tooltip.h"
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#include "map.h"
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#include "misc.h"
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#include "pathitem.h"
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PathItem::PathItem(const Path &path, Map *map, QGraphicsItem *parent)
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: QGraphicsObject(parent)
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{
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Q_ASSERT(path.count() >= 2);
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_path = path;
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_map = map;
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_digitalZoom = 0;
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_width = 3;
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QBrush brush(Qt::SolidPattern);
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_pen = QPen(brush, _width);
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updatePainterPath(map);
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updateShape();
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_marker = new MarkerItem(this);
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_marker->setPos(position(_path.at(0).distance()));
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_markerDistance = _path.at(0).distance();
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setCursor(Qt::ArrowCursor);
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setAcceptHoverEvents(true);
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}
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void PathItem::updateShape()
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{
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QPainterPathStroker s;
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s.setWidth((_width + 1) * pow(2, -_digitalZoom));
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_shape = s.createStroke(_painterPath);
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}
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void PathItem::updatePainterPath(Map *map)
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{
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_painterPath = QPainterPath();
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_painterPath.moveTo(map->ll2xy(_path.first().coordinates()));
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for (int i = 1; i < _path.size(); i++)
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_painterPath.lineTo(map->ll2xy(_path.at(i).coordinates()));
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}
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void PathItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
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QWidget *widget)
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{
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Q_UNUSED(option);
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Q_UNUSED(widget);
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painter->setPen(_pen);
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painter->drawPath(_painterPath);
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/*
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QPen p = QPen(QBrush(Qt::red), 0);
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painter->setPen(p);
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painter->drawRect(boundingRect());
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*/
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}
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void PathItem::setMap(Map *map)
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{
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_map = map;
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prepareGeometryChange();
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updatePainterPath(map);
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updateShape();
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_marker->setPos(position(_markerDistance));
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}
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void PathItem::setColor(const QColor &color)
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{
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_pen.setColor(color);
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update();
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}
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void PathItem::setWidth(qreal width)
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{
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prepareGeometryChange();
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_width = width;
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_pen.setWidthF(_width * pow(2, -_digitalZoom));
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updateShape();
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}
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void PathItem::setStyle(Qt::PenStyle style)
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{
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_pen.setStyle(style);
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update();
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}
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void PathItem::setDigitalZoom(int zoom)
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{
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prepareGeometryChange();
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_digitalZoom = zoom;
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_pen.setWidthF(_width * pow(2, -_digitalZoom));
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_marker->setScale(pow(2, -_digitalZoom));
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updateShape();
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}
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QPointF PathItem::position(qreal x) const
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{
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int low = 0;
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int high = _path.count() - 1;
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int mid = 0;
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Q_ASSERT(high > low);
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Q_ASSERT(x >= _path.at(low).distance() && x <= _path.at(high).distance());
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while (low <= high) {
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mid = low + ((high - low) / 2);
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qreal val = _path.at(mid).distance();
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if (val > x)
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high = mid - 1;
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else if (val < x)
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low = mid + 1;
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else
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return _map->ll2xy(_path.at(mid).coordinates());
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}
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QLineF l;
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qreal p1, p2;
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if (_path.at(mid).distance() < x) {
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l = QLineF(_map->ll2xy(_path.at(mid).coordinates()),
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_map->ll2xy(_path.at(mid+1).coordinates()));
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p1 = _path.at(mid).distance(); p2 = _path.at(mid+1).distance();
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} else {
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l = QLineF(_map->ll2xy(_path.at(mid-1).coordinates()),
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_map->ll2xy(_path.at(mid).coordinates()));
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p1 = _path.at(mid-1).distance(); p2 = _path.at(mid).distance();
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}
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return l.pointAt((x - p1) / (p2 - p1));
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}
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void PathItem::moveMarker(qreal distance)
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{
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if (distance >= _path.first().distance()
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&& distance <= _path.last().distance()) {
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_marker->setVisible(true);
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_marker->setPos(position(distance));
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_markerDistance = distance;
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} else
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_marker->setVisible(false);
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}
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void PathItem::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
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{
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Q_UNUSED(event);
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_pen.setWidthF((_width + 1) * pow(2, -_digitalZoom));
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setZValue(zValue() + 1.0);
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update();
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emit selected(true);
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}
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void PathItem::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
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{
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Q_UNUSED(event);
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_pen.setWidthF(_width * pow(2, -_digitalZoom));
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setZValue(zValue() - 1.0);
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update();
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emit selected(false);
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}
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