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| |
| #include "qdeclarativepolygonmapitem_p.h" |
| #include "qlocationutils_p.h" |
| #include "error_messages_p.h" |
| #include "locationvaluetypehelper_p.h" |
| #include <QtLocation/private/qgeomap_p.h> |
| |
| #include <QtCore/QScopedValueRollback> |
| #include <QtGui/private/qtriangulator_p.h> |
| #include <QtQml/QQmlInfo> |
| #include <QtQml/private/qqmlengine_p.h> |
| #include <QPainter> |
| #include <QPainterPath> |
| #include <qnumeric.h> |
| |
| #include <QtPositioning/private/qdoublevector2d_p.h> |
| #include <QtPositioning/private/qclipperutils_p.h> |
| #include <QtPositioning/private/qgeopolygon_p.h> |
| |
| /* poly2tri triangulator includes */ |
| #include <clip2tri.h> |
| #include <earcut.hpp> |
| #include <array> |
| |
| QT_BEGIN_NAMESPACE |
| |
| /*! |
| \qmltype MapPolygon |
| \instantiates QDeclarativePolygonMapItem |
| \inqmlmodule QtLocation |
| \ingroup qml-QtLocation5-maps |
| \since QtLocation 5.5 |
| |
| \brief The MapPolygon type displays a polygon on a Map. |
| |
| The MapPolygon type displays a polygon on a Map, specified in terms of an ordered list of |
| \l {QtPositioning::coordinate}{coordinates}. For best appearance and results, polygons should be |
| simple (not self-intersecting). |
| |
| The \l {QtPositioning::coordinate}{coordinates} on the path cannot be directly changed after |
| being added to the Polygon. Instead, copy the \l path into a var, modify the copy and reassign |
| the copy back to the \l path. |
| |
| \code |
| var path = mapPolygon.path; |
| path[0].latitude = 5; |
| mapPolygon.path = path; |
| \endcode |
| |
| Coordinates can also be added and removed at any time using the \l addCoordinate and |
| \l removeCoordinate methods. |
| |
| For drawing rectangles with "straight" edges (same latitude across one |
| edge, same latitude across the other), the \l MapRectangle type provides |
| a simpler, two-point API. |
| |
| By default, the polygon is displayed as a 1 pixel black border with no |
| fill. To change its appearance, use the \l color, \l border.color and |
| \l border.width properties. |
| |
| \note Since MapPolygons are geographic items, dragging a MapPolygon |
| (through the use of \l MouseArea) causes its vertices to be |
| recalculated in the geographic coordinate space. The edges retain the |
| same geographic lengths (latitude and longitude differences between the |
| vertices), but they remain straight. Apparent stretching of the item occurs |
| when dragged to a different latitude. |
| |
| \section2 Performance |
| |
| MapPolygons have a rendering cost that is O(n) with respect to the number |
| of vertices. This means that the per frame cost of having a Polygon on the |
| Map grows in direct proportion to the number of points on the Polygon. There |
| is an additional triangulation cost (approximately O(n log n)) which is |
| currently paid with each frame, but in future may be paid only upon adding |
| or removing points. |
| |
| Like the other map objects, MapPolygon is normally drawn without a smooth |
| appearance. Setting the \l {Item::opacity}{opacity} property will force the object to |
| be blended, which decreases performance considerably depending on the hardware in use. |
| |
| \section2 Example Usage |
| |
| The following snippet shows a MapPolygon being used to display a triangle, |
| with three vertices near Brisbane, Australia. The triangle is filled in |
| green, with a 1 pixel black border. |
| |
| \code |
| Map { |
| MapPolygon { |
| color: 'green' |
| path: [ |
| { latitude: -27, longitude: 153.0 }, |
| { latitude: -27, longitude: 154.1 }, |
| { latitude: -28, longitude: 153.5 } |
| ] |
| } |
| } |
| \endcode |
| |
| \image api-mappolygon.png |
| */ |
| |
| /*! |
| \qmlproperty bool QtLocation::MapPolygon::autoFadeIn |
| |
| This property holds whether the item automatically fades in when zooming into the map |
| starting from very low zoom levels. By default this is \c true. |
| Setting this property to \c false causes the map item to always have the opacity specified |
| with the \l QtQuick::Item::opacity property, which is 1.0 by default. |
| |
| \since 5.14 |
| */ |
| |
| QGeoMapPolygonGeometry::QGeoMapPolygonGeometry() |
| : assumeSimple_(false) |
| { |
| } |
| |
| /*! |
| \internal |
| */ |
| void QGeoMapPolygonGeometry::updateSourcePoints(const QGeoMap &map, |
| const QList<QDoubleVector2D> &path) |
| { |
| if (!sourceDirty_) |
| return; |
| const QGeoProjectionWebMercator &p = static_cast<const QGeoProjectionWebMercator&>(map.geoProjection()); |
| srcPath_ = QPainterPath(); |
| |
| // build the actual path |
| // The approach is the same as described in QGeoMapPolylineGeometry::updateSourcePoints |
| srcOrigin_ = geoLeftBound_; |
| double unwrapBelowX = 0; |
| QDoubleVector2D leftBoundWrapped = p.wrapMapProjection(p.geoToMapProjection(geoLeftBound_)); |
| if (preserveGeometry_) |
| unwrapBelowX = leftBoundWrapped.x(); |
| |
| QList<QDoubleVector2D> wrappedPath; |
| wrappedPath.reserve(path.size()); |
| QDoubleVector2D wrappedLeftBound(qInf(), qInf()); |
| // 1) |
| for (int i = 0; i < path.size(); ++i) { |
| const QDoubleVector2D &coord = path.at(i); |
| QDoubleVector2D wrappedProjection = p.wrapMapProjection(coord); |
| |
| // We can get NaN if the map isn't set up correctly, or the projection |
| // is faulty -- probably best thing to do is abort |
| if (!qIsFinite(wrappedProjection.x()) || !qIsFinite(wrappedProjection.y())) |
| return; |
| |
| const bool isPointLessThanUnwrapBelowX = (wrappedProjection.x() < leftBoundWrapped.x()); |
| // unwrap x to preserve geometry if moved to border of map |
| if (preserveGeometry_ && isPointLessThanUnwrapBelowX) { |
| double distance = wrappedProjection.x() - unwrapBelowX; |
| if (distance < 0.0) |
| distance += 1.0; |
| wrappedProjection.setX(unwrapBelowX + distance); |
| } |
| if (wrappedProjection.x() < wrappedLeftBound.x() || (wrappedProjection.x() == wrappedLeftBound.x() && wrappedProjection.y() < wrappedLeftBound.y())) { |
| wrappedLeftBound = wrappedProjection; |
| } |
| wrappedPath.append(wrappedProjection); |
| } |
| |
| // 2) |
| QList<QList<QDoubleVector2D> > clippedPaths; |
| const QList<QDoubleVector2D> &visibleRegion = p.projectableGeometry(); |
| if (visibleRegion.size()) { |
| c2t::clip2tri clipper; |
| clipper.addSubjectPath(QClipperUtils::qListToPath(wrappedPath), true); |
| clipper.addClipPolygon(QClipperUtils::qListToPath(visibleRegion)); |
| Paths res = clipper.execute(c2t::clip2tri::Intersection, QtClipperLib::pftEvenOdd, QtClipperLib::pftEvenOdd); |
| clippedPaths = QClipperUtils::pathsToQList(res); |
| |
| // 2.1) update srcOrigin_ and leftBoundWrapped with the point with minimum X |
| QDoubleVector2D lb(qInf(), qInf()); |
| for (const QList<QDoubleVector2D> &path: clippedPaths) |
| for (const QDoubleVector2D &p: path) |
| if (p.x() < lb.x() || (p.x() == lb.x() && p.y() < lb.y())) |
| // y-minimization needed to find the same point on polygon and border |
| lb = p; |
| |
| if (qIsInf(lb.x())) // e.g., when the polygon is clipped entirely |
| return; |
| |
| // 2.2) Prevent the conversion to and from clipper from introducing negative offsets which |
| // in turn will make the geometry wrap around. |
| lb.setX(qMax(wrappedLeftBound.x(), lb.x())); |
| leftBoundWrapped = lb; |
| srcOrigin_ = p.mapProjectionToGeo(p.unwrapMapProjection(lb)); |
| } else { |
| clippedPaths.append(wrappedPath); |
| } |
| |
| // 3) |
| QDoubleVector2D origin = p.wrappedMapProjectionToItemPosition(leftBoundWrapped); |
| for (const QList<QDoubleVector2D> &path: clippedPaths) { |
| QDoubleVector2D lastAddedPoint; |
| for (int i = 0; i < path.size(); ++i) { |
| QDoubleVector2D point = p.wrappedMapProjectionToItemPosition(path.at(i)); |
| point = point - origin; // (0,0) if point == geoLeftBound_ |
| |
| if (i == 0) { |
| srcPath_.moveTo(point.toPointF()); |
| lastAddedPoint = point; |
| } else { |
| if ((point - lastAddedPoint).manhattanLength() > 3 || |
| i == path.size() - 1) { |
| srcPath_.lineTo(point.toPointF()); |
| lastAddedPoint = point; |
| } |
| } |
| } |
| srcPath_.closeSubpath(); |
| } |
| |
| if (!assumeSimple_) |
| srcPath_ = srcPath_.simplified(); |
| |
| sourceBounds_ = srcPath_.boundingRect(); |
| } |
| |
| /*! |
| \internal |
| */ |
| void QGeoMapPolygonGeometry::updateScreenPoints(const QGeoMap &map, qreal strokeWidth) |
| { |
| if (!screenDirty_) |
| return; |
| |
| if (map.viewportWidth() == 0 || map.viewportHeight() == 0) { |
| clear(); |
| return; |
| } |
| |
| // The geometry has already been clipped against the visible region projection in wrapped mercator space. |
| QPainterPath ppi = srcPath_; |
| clear(); |
| |
| // a polygon requires at least 3 points; |
| if (ppi.elementCount() < 3) |
| return; |
| |
| // translate the path into top-left-centric coordinates |
| QRectF bb = ppi.boundingRect(); |
| ppi.translate(-bb.left(), -bb.top()); |
| firstPointOffset_ = -1 * bb.topLeft(); |
| |
| ppi.closeSubpath(); |
| screenOutline_ = ppi; |
| |
| using Coord = double; |
| using N = uint32_t; |
| using Point = std::array<Coord, 2>; |
| |
| std::vector<std::vector<Point>> polygon; |
| polygon.push_back(std::vector<Point>()); |
| std::vector<Point> &poly = polygon.front(); |
| // ... fill polygon structure with actual data |
| |
| for (int i = 0; i < ppi.elementCount(); ++i) { |
| const QPainterPath::Element e = ppi.elementAt(i); |
| if (e.isMoveTo() || i == ppi.elementCount() - 1 |
| || (qAbs(e.x - poly.front()[0]) < 0.1 |
| && qAbs(e.y - poly.front()[1]) < 0.1)) { |
| Point p = {{ e.x, e.y }}; |
| poly.push_back( p ); |
| } else if (e.isLineTo()) { |
| Point p = {{ e.x, e.y }}; |
| poly.push_back( p ); |
| } else { |
| qWarning("Unhandled element type in polygon painterpath"); |
| } |
| } |
| |
| if (poly.size() > 2) { |
| // Run tessellation |
| // Returns array of indices that refer to the vertices of the input polygon. |
| // Three subsequent indices form a triangle. |
| screenVertices_.clear(); |
| screenIndices_.clear(); |
| for (const auto &p : poly) |
| screenVertices_ << QPointF(p[0], p[1]); |
| std::vector<N> indices = qt_mapbox::earcut<N>(polygon); |
| for (const auto &i: indices) |
| screenIndices_ << quint32(i); |
| } |
| |
| screenBounds_ = ppi.boundingRect(); |
| if (strokeWidth != 0.0) |
| this->translate(QPointF(strokeWidth, strokeWidth)); |
| } |
| |
| QDeclarativePolygonMapItem::QDeclarativePolygonMapItem(QQuickItem *parent) |
| : QDeclarativeGeoMapItemBase(parent), border_(this), color_(Qt::transparent), dirtyMaterial_(true), |
| updatingGeometry_(false) |
| { |
| m_itemType = QGeoMap::MapPolygon; |
| geopath_ = QGeoPolygonEager(); |
| setFlag(ItemHasContents, true); |
| QObject::connect(&border_, SIGNAL(colorChanged(QColor)), |
| this, SLOT(markSourceDirtyAndUpdate())); |
| QObject::connect(&border_, SIGNAL(widthChanged(qreal)), |
| this, SLOT(markSourceDirtyAndUpdate())); |
| } |
| |
| QDeclarativePolygonMapItem::~QDeclarativePolygonMapItem() |
| { |
| } |
| |
| /*! |
| \qmlpropertygroup Location::MapPolygon::border |
| \qmlproperty int MapPolygon::border.width |
| \qmlproperty color MapPolygon::border.color |
| |
| This property is part of the border property group. The border property |
| group holds the width and color used to draw the border of the polygon. |
| |
| The width is in pixels and is independent of the zoom level of the map. |
| |
| The default values correspond to a black border with a width of 1 pixel. |
| For no line, use a width of 0 or a transparent color. |
| */ |
| |
| QDeclarativeMapLineProperties *QDeclarativePolygonMapItem::border() |
| { |
| return &border_; |
| } |
| |
| /*! |
| \internal |
| */ |
| void QDeclarativePolygonMapItem::setMap(QDeclarativeGeoMap *quickMap, QGeoMap *map) |
| { |
| QDeclarativeGeoMapItemBase::setMap(quickMap,map); |
| if (map) { |
| regenerateCache(); |
| geometry_.markSourceDirty(); |
| borderGeometry_.markSourceDirty(); |
| polishAndUpdate(); |
| } |
| } |
| |
| /*! |
| \qmlproperty list<coordinate> MapPolygon::path |
| |
| This property holds the ordered list of coordinates which |
| define the polygon. |
| Having less than 3 different coordinates in the path results in undefined behavior. |
| |
| \sa addCoordinate, removeCoordinate |
| */ |
| QJSValue QDeclarativePolygonMapItem::path() const |
| { |
| return fromList(this, geopath_.path()); |
| } |
| |
| void QDeclarativePolygonMapItem::setPath(const QJSValue &value) |
| { |
| if (!value.isArray()) |
| return; |
| |
| QList<QGeoCoordinate> pathList = toList(this, value); |
| |
| // Equivalent to QDeclarativePolylineMapItem::setPathFromGeoList |
| if (geopath_.path() == pathList) |
| return; |
| |
| geopath_.setPath(pathList); |
| |
| regenerateCache(); |
| geometry_.setPreserveGeometry(true, geopath_.boundingGeoRectangle().topLeft()); |
| borderGeometry_.setPreserveGeometry(true, geopath_.boundingGeoRectangle().topLeft()); |
| markSourceDirtyAndUpdate(); |
| emit pathChanged(); |
| } |
| |
| /*! |
| \qmlmethod void MapPolygon::addCoordinate(coordinate) |
| |
| Adds the specified \a coordinate to the path. |
| |
| \sa removeCoordinate, path |
| */ |
| |
| void QDeclarativePolygonMapItem::addCoordinate(const QGeoCoordinate &coordinate) |
| { |
| if (!coordinate.isValid()) |
| return; |
| |
| geopath_.addCoordinate(coordinate); |
| updateCache(); |
| geometry_.setPreserveGeometry(true, geopath_.boundingGeoRectangle().topLeft()); |
| borderGeometry_.setPreserveGeometry(true, geopath_.boundingGeoRectangle().topLeft()); |
| markSourceDirtyAndUpdate(); |
| emit pathChanged(); |
| } |
| |
| /*! |
| \qmlmethod void MapPolygon::removeCoordinate(coordinate) |
| |
| Removes \a coordinate from the path. If there are multiple instances of the |
| same coordinate, the one added last is removed. |
| |
| If \a coordinate is not in the path this method does nothing. |
| |
| \sa addCoordinate, path |
| */ |
| void QDeclarativePolygonMapItem::removeCoordinate(const QGeoCoordinate &coordinate) |
| { |
| int length = geopath_.path().length(); |
| geopath_.removeCoordinate(coordinate); |
| if (geopath_.path().length() == length) |
| return; |
| |
| regenerateCache(); |
| geometry_.setPreserveGeometry(true, geopath_.boundingGeoRectangle().topLeft()); |
| borderGeometry_.setPreserveGeometry(true, geopath_.boundingGeoRectangle().topLeft()); |
| markSourceDirtyAndUpdate(); |
| emit pathChanged(); |
| } |
| |
| /*! |
| \qmlproperty color MapPolygon::color |
| |
| This property holds the color used to fill the polygon. |
| |
| The default value is transparent. |
| */ |
| |
| QColor QDeclarativePolygonMapItem::color() const |
| { |
| return color_; |
| } |
| |
| void QDeclarativePolygonMapItem::setColor(const QColor &color) |
| { |
| if (color_ == color) |
| return; |
| |
| color_ = color; |
| dirtyMaterial_ = true; |
| update(); |
| emit colorChanged(color_); |
| } |
| |
| /*! |
| \internal |
| */ |
| QSGNode *QDeclarativePolygonMapItem::updateMapItemPaintNode(QSGNode *oldNode, UpdatePaintNodeData *data) |
| { |
| Q_UNUSED(data); |
| MapPolygonNode *node = static_cast<MapPolygonNode *>(oldNode); |
| |
| if (!node) |
| node = new MapPolygonNode(); |
| |
| //TODO: update only material |
| if (geometry_.isScreenDirty() || borderGeometry_.isScreenDirty() || dirtyMaterial_) { |
| node->update(color_, border_.color(), &geometry_, &borderGeometry_); |
| geometry_.setPreserveGeometry(false); |
| borderGeometry_.setPreserveGeometry(false); |
| geometry_.markClean(); |
| borderGeometry_.markClean(); |
| dirtyMaterial_ = false; |
| } |
| return node; |
| } |
| |
| /*! |
| \internal |
| */ |
| void QDeclarativePolygonMapItem::updatePolish() |
| { |
| if (!map() || map()->geoProjection().projectionType() != QGeoProjection::ProjectionWebMercator) |
| return; |
| if (geopath_.path().length() == 0) { // Possibly cleared |
| geometry_.clear(); |
| borderGeometry_.clear(); |
| setWidth(0); |
| setHeight(0); |
| return; |
| } |
| |
| const QGeoProjectionWebMercator &p = static_cast<const QGeoProjectionWebMercator&>(map()->geoProjection()); |
| QScopedValueRollback<bool> rollback(updatingGeometry_); |
| updatingGeometry_ = true; |
| |
| geometry_.updateSourcePoints(*map(), geopathProjected_); |
| geometry_.updateScreenPoints(*map(), border_.width()); |
| |
| QList<QGeoMapItemGeometry *> geoms; |
| geoms << &geometry_; |
| borderGeometry_.clear(); |
| |
| if (border_.color() != Qt::transparent && border_.width() > 0) { |
| QList<QDoubleVector2D> closedPath = geopathProjected_; |
| closedPath << closedPath.first(); |
| |
| borderGeometry_.setPreserveGeometry(true, geopath_.boundingGeoRectangle().topLeft()); |
| |
| const QGeoCoordinate &geometryOrigin = geometry_.origin(); |
| |
| borderGeometry_.srcPoints_.clear(); |
| borderGeometry_.srcPointTypes_.clear(); |
| |
| QDoubleVector2D borderLeftBoundWrapped; |
| QList<QList<QDoubleVector2D > > clippedPaths = borderGeometry_.clipPath(*map(), closedPath, borderLeftBoundWrapped); |
| if (clippedPaths.size()) { |
| borderLeftBoundWrapped = p.geoToWrappedMapProjection(geometryOrigin); |
| borderGeometry_.pathToScreen(*map(), clippedPaths, borderLeftBoundWrapped); |
| borderGeometry_.updateScreenPoints(*map(), border_.width()); |
| |
| geoms << &borderGeometry_; |
| } else { |
| borderGeometry_.clear(); |
| } |
| } |
| |
| QRectF combined = QGeoMapItemGeometry::translateToCommonOrigin(geoms); |
| setWidth(combined.width() + 2 * border_.width()); |
| setHeight(combined.height() + 2 * border_.width()); |
| |
| setPositionOnMap(geometry_.origin(), -1 * geometry_.sourceBoundingBox().topLeft() |
| + QPointF(border_.width(), border_.width())); |
| } |
| |
| void QDeclarativePolygonMapItem::markSourceDirtyAndUpdate() |
| { |
| geometry_.markSourceDirty(); |
| borderGeometry_.markSourceDirty(); |
| polishAndUpdate(); |
| } |
| |
| /*! |
| \internal |
| */ |
| void QDeclarativePolygonMapItem::afterViewportChanged(const QGeoMapViewportChangeEvent &event) |
| { |
| if (event.mapSize.width() <= 0 || event.mapSize.height() <= 0) |
| return; |
| |
| geometry_.setPreserveGeometry(true, geometry_.geoLeftBound()); |
| borderGeometry_.setPreserveGeometry(true, borderGeometry_.geoLeftBound()); |
| geometry_.markSourceDirty(); |
| borderGeometry_.markSourceDirty(); |
| polishAndUpdate(); |
| } |
| |
| /*! |
| \internal |
| */ |
| void QDeclarativePolygonMapItem::regenerateCache() |
| { |
| if (!map() || map()->geoProjection().projectionType() != QGeoProjection::ProjectionWebMercator) |
| return; |
| const QGeoProjectionWebMercator &p = static_cast<const QGeoProjectionWebMercator&>(map()->geoProjection()); |
| geopathProjected_.clear(); |
| geopathProjected_.reserve(geopath_.path().size()); |
| for (const QGeoCoordinate &c : geopath_.path()) |
| geopathProjected_ << p.geoToMapProjection(c); |
| } |
| |
| /*! |
| \internal |
| */ |
| void QDeclarativePolygonMapItem::updateCache() |
| { |
| if (!map() || map()->geoProjection().projectionType() != QGeoProjection::ProjectionWebMercator) |
| return; |
| const QGeoProjectionWebMercator &p = static_cast<const QGeoProjectionWebMercator&>(map()->geoProjection()); |
| geopathProjected_ << p.geoToMapProjection(geopath_.path().last()); |
| } |
| |
| /*! |
| \internal |
| */ |
| bool QDeclarativePolygonMapItem::contains(const QPointF &point) const |
| { |
| return (geometry_.contains(point) || borderGeometry_.contains(point)); |
| } |
| |
| const QGeoShape &QDeclarativePolygonMapItem::geoShape() const |
| { |
| return geopath_; |
| } |
| |
| void QDeclarativePolygonMapItem::setGeoShape(const QGeoShape &shape) |
| { |
| if (shape == geopath_) |
| return; |
| |
| geopath_ = QGeoPolygonEager(shape); |
| regenerateCache(); |
| geometry_.setPreserveGeometry(true, geopath_.boundingGeoRectangle().topLeft()); |
| borderGeometry_.setPreserveGeometry(true, geopath_.boundingGeoRectangle().topLeft()); |
| markSourceDirtyAndUpdate(); |
| emit pathChanged(); |
| } |
| |
| /*! |
| \internal |
| */ |
| void QDeclarativePolygonMapItem::geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry) |
| { |
| if (!map() || !geopath_.isValid() || updatingGeometry_ || newGeometry.topLeft() == oldGeometry.topLeft()) { |
| QDeclarativeGeoMapItemBase::geometryChanged(newGeometry, oldGeometry); |
| return; |
| } |
| // TODO: change the algorithm to preserve the distances and size! |
| QGeoCoordinate newCenter = map()->geoProjection().itemPositionToCoordinate(QDoubleVector2D(newGeometry.center()), false); |
| QGeoCoordinate oldCenter = map()->geoProjection().itemPositionToCoordinate(QDoubleVector2D(oldGeometry.center()), false); |
| if (!newCenter.isValid() || !oldCenter.isValid()) |
| return; |
| double offsetLongi = newCenter.longitude() - oldCenter.longitude(); |
| double offsetLati = newCenter.latitude() - oldCenter.latitude(); |
| if (offsetLati == 0.0 && offsetLongi == 0.0) |
| return; |
| |
| geopath_.translate(offsetLati, offsetLongi); |
| regenerateCache(); |
| geometry_.setPreserveGeometry(true, geopath_.boundingGeoRectangle().topLeft()); |
| borderGeometry_.setPreserveGeometry(true, geopath_.boundingGeoRectangle().topLeft()); |
| markSourceDirtyAndUpdate(); |
| emit pathChanged(); |
| |
| // Not calling QDeclarativeGeoMapItemBase::geometryChanged() as it will be called from a nested |
| // call to this function. |
| } |
| |
| ////////////////////////////////////////////////////////////////////// |
| |
| MapPolygonNode::MapPolygonNode() : |
| border_(new MapPolylineNode()), |
| geometry_(QSGGeometry::defaultAttributes_Point2D(), 0) |
| { |
| geometry_.setDrawingMode(QSGGeometry::DrawTriangles); |
| QSGGeometryNode::setMaterial(&fill_material_); |
| QSGGeometryNode::setGeometry(&geometry_); |
| |
| appendChildNode(border_); |
| } |
| |
| MapPolygonNode::~MapPolygonNode() |
| { |
| } |
| |
| /*! |
| \internal |
| */ |
| void MapPolygonNode::update(const QColor &fillColor, const QColor &borderColor, |
| const QGeoMapItemGeometry *fillShape, |
| const QGeoMapItemGeometry *borderShape) |
| { |
| /* Do the border update first */ |
| border_->update(borderColor, borderShape); |
| |
| /* If we have neither fill nor border with valid points, block the whole |
| * tree. We can't just block the fill without blocking the border too, so |
| * we're a little conservative here (maybe at the expense of rendering |
| * accuracy) */ |
| if (fillShape->size() == 0 && borderShape->size() == 0) { |
| setSubtreeBlocked(true); |
| return; |
| } |
| setSubtreeBlocked(false); |
| |
| |
| QSGGeometry *fill = QSGGeometryNode::geometry(); |
| fillShape->allocateAndFill(fill); |
| markDirty(DirtyGeometry); |
| |
| if (fillColor != fill_material_.color()) { |
| fill_material_.setColor(fillColor); |
| setMaterial(&fill_material_); |
| markDirty(DirtyMaterial); |
| } |
| } |
| |
| QT_END_NAMESPACE |
