qdeclarativerectanglemapitem.cpp

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// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "qdeclarativerectanglemapitem_p.h"
#include "qdeclarativerectanglemapitem_p_p.h"
 
#include <QtCore/QScopedValueRollback>
#include <QPainterPath>
#include <qnumeric.h>
#include <QRectF>
#include <QPointF>
 
#include <QtLocation/private/qgeomap_p.h>
#include <QtPositioning/private/qlocationutils_p.h>
#include <QtPositioning/private/qwebmercator_p.h>
#include <QtPositioning/private/qdoublevector2d_p.h>
 
QT_BEGIN_NAMESPACE
 
QDeclarativeRectangleMapItem::QDeclarativeRectangleMapItem(QQuickItem *parent)
    : QDeclarativeGeoMapItemBase(parent), m_border(this),
      m_d(new QDeclarativeRectangleMapItemPrivateCPU(*this))
{
    // ToDo: handle envvar, and switch implementation.
    m_itemType = QGeoMap::MapRectangle;
    setFlag(ItemHasContents, true);
    QObject::connect(&m_border, &QDeclarativeMapLineProperties::colorChanged,
                     this, &QDeclarativeRectangleMapItem::onLinePropertiesChanged);
    QObject::connect(&m_border, &QDeclarativeMapLineProperties::widthChanged,
                     this, &QDeclarativeRectangleMapItem::onLinePropertiesChanged);
}
 
QDeclarativeRectangleMapItem::~QDeclarativeRectangleMapItem()
{
}
 
void QDeclarativeRectangleMapItem::setMap(QDeclarativeGeoMap *quickMap, QGeoMap *map)
{
    QDeclarativeGeoMapItemBase::setMap(quickMap,map);
    if (!map)
        return;
    m_d->onMapSet();
}
 
QDeclarativeMapLineProperties *QDeclarativeRectangleMapItem::border()
{
    return &m_border;
}
 
void QDeclarativeRectangleMapItem::setTopLeft(const QGeoCoordinate &topLeft)
{
    if (m_rectangle.topLeft() == topLeft)
        return;
 
    m_rectangle.setTopLeft(topLeft);
    m_d->onGeoGeometryChanged();
    emit topLeftChanged(topLeft);
}
 
QGeoCoordinate QDeclarativeRectangleMapItem::topLeft()
{
    return m_rectangle.topLeft();
}
 
void QDeclarativeRectangleMapItem::markSourceDirtyAndUpdate()
{
    m_d->markSourceDirtyAndUpdate();
}
 
void QDeclarativeRectangleMapItem::onLinePropertiesChanged()
{
    m_d->onLinePropertiesChanged();
}
 
void QDeclarativeRectangleMapItem::setBottomRight(const QGeoCoordinate &bottomRight)
{
    if (m_rectangle.bottomRight() == bottomRight)
        return;
 
    m_rectangle.setBottomRight(bottomRight);
    m_d->onGeoGeometryChanged();
    emit bottomRightChanged(bottomRight);
}
 
QGeoCoordinate QDeclarativeRectangleMapItem::bottomRight()
{
    return m_rectangle.bottomRight();
}
 
QColor QDeclarativeRectangleMapItem::color() const
{
    return m_color;
}
 
void QDeclarativeRectangleMapItem::setColor(const QColor &color)
{
    if (m_color == color)
        return;
    m_color = color;
    polishAndUpdate();
    emit colorChanged(m_color);
}
 
QSGNode *QDeclarativeRectangleMapItem::updateMapItemPaintNode(QSGNode *oldNode, UpdatePaintNodeData *data)
{
    return m_d->updateMapItemPaintNode(oldNode, data);
}
 
void QDeclarativeRectangleMapItem::updatePolish()
{
    if (!map() || map()->geoProjection().projectionType() != QGeoProjection::ProjectionWebMercator)
        return;
    m_d->updatePolish();
}
 
void QDeclarativeRectangleMapItem::afterViewportChanged(const QGeoMapViewportChangeEvent &event)
{
    if (event.mapSize.width() <= 0 || event.mapSize.height() <= 0)
        return;
    m_d->afterViewportChanged();
}
 
bool QDeclarativeRectangleMapItem::contains(const QPointF &point) const
{
    return m_d->contains(point);
}
 
const QGeoShape &QDeclarativeRectangleMapItem::geoShape() const
{
    return m_rectangle;
}
 
void QDeclarativeRectangleMapItem::setGeoShape(const QGeoShape &shape)
{
    if (shape == m_rectangle)
        return;
 
    const QGeoRectangle rectangle = m_rectangle.boundingGeoRectangle();
    const bool tlHasChanged = rectangle.topLeft() != m_rectangle.topLeft();
    const bool brHasChanged = rectangle.bottomRight() != m_rectangle.bottomRight();
    m_rectangle = rectangle;
 
    m_d->onGeoGeometryChanged();
    if (tlHasChanged)
        emit topLeftChanged(m_rectangle.topLeft());
    if (brHasChanged)
        emit bottomRightChanged(m_rectangle.bottomRight());
}
 
void QDeclarativeRectangleMapItem::geometryChange(const QRectF &newGeometry, const QRectF &oldGeometry)
{
    if (!map() || !m_rectangle.isValid() || m_updatingGeometry || newGeometry.topLeft() == oldGeometry.topLeft()) {
        QDeclarativeGeoMapItemBase::geometryChange(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;
 
    m_rectangle.translate(offsetLati, offsetLongi);
    m_d->onItemGeometryChanged();
    emit topLeftChanged(m_rectangle.topLeft());
    emit bottomRightChanged(m_rectangle.bottomRight());
 
    // Not calling QDeclarativeGeoMapItemBase::geometryChange() as it will be called from a nested
    // call to this function.
}
 
QDeclarativeRectangleMapItemPrivate::QDeclarativeRectangleMapItemPrivate(QDeclarativeRectangleMapItem &rect)
    : m_rect(rect)
{
}
 
QDeclarativeRectangleMapItemPrivate::~QDeclarativeRectangleMapItemPrivate()
{
}
 
QDeclarativeRectangleMapItemPrivateCPU::QDeclarativeRectangleMapItemPrivateCPU(QDeclarativeRectangleMapItem &rect)
    : QDeclarativeRectangleMapItemPrivate(rect)
{
    m_shape = new QQuickShape(&m_rect);
    m_shape->setObjectName("_qt_map_item_shape");
    m_shape->setZ(-1);
    m_shape->setContainsMode(QQuickShape::FillContains);
 
    m_shapePath = new QQuickShapePath(m_shape);
    m_painterPath = new QDeclarativeGeoMapPainterPath(m_shapePath);
 
    auto pathElements = m_shapePath->pathElements();
    pathElements.append(&pathElements, m_painterPath);
 
    auto shapePaths = m_shape->data();
    shapePaths.append(&shapePaths, m_shapePath);
}
 
QDeclarativeRectangleMapItemPrivateCPU::~QDeclarativeRectangleMapItemPrivateCPU()
{
    delete m_shape;
}
 
void QDeclarativeRectangleMapItemPrivateCPU::updatePolish()
{
    if (!m_rect.topLeft().isValid() || !m_rect.bottomRight().isValid()) {
        m_geometry.clear();
        m_rect.setWidth(0);
        m_rect.setHeight(0);
        m_shape->setVisible(false);
        return;
    }
 
    QScopedValueRollback<bool> rollback(m_rect.m_updatingGeometry);
    m_rect.m_updatingGeometry = true;
 
    QList<QGeoCoordinate> perimeter = QGeoMapItemGeometry::path(m_rect.m_rectangle);
 
    if (m_rect.referenceSurface() == QLocation::ReferenceSurface::Globe) {
        perimeter = QDeclarativeGeoMapItemUtils::greaterCirclePath(perimeter,
                                                                      QDeclarativeGeoMapItemUtils::ClosedPath);
    }
 
    const QList<QDoubleVector2D> pathMercator = QGeoMapItemGeometry::pathMercator(perimeter);
 
    m_geometry.updateSourcePoints(*m_rect.map(), QList<QList<QDoubleVector2D>>{pathMercator},
                                  m_rect.referenceSurface() == QLocation::ReferenceSurface::Globe ? QGeoMapPolygonGeometry::WrapAround :
                                                         QGeoMapPolygonGeometry::Duplicate);
    m_rect.setShapeTriangulationScale(m_shape, m_geometry.maxCoord());
 
    const bool hasBorder = m_rect.m_border.color().alpha() != 0 && m_rect.m_border.width() > 0;
    m_shapePath->setStrokeColor(hasBorder ? m_rect.m_border.color() : Qt::transparent);
    const float borderWidth = hasBorder ? m_rect.m_border.width() : 0.0f;
    m_shapePath->setStrokeWidth(hasBorder ? borderWidth : -1.0f);
    m_shapePath->setFillColor(m_rect.color());
 
    const QRectF bb = m_geometry.sourceBoundingBox();
    QPainterPath path = m_geometry.srcPath();
    path.translate(-bb.left() + borderWidth, -bb.top() + borderWidth);
    path.closeSubpath();
    m_painterPath->setPath(path);
 
    m_rect.setSize(bb.size() + QSize(2 * borderWidth, 2 * borderWidth));
    m_shape->setSize(m_rect.size());
    m_shape->setOpacity(m_rect.zoomLevelOpacity());
    m_shape->setVisible(true);
 
    m_rect.setPositionOnMap(m_geometry.origin(), -1 * bb.topLeft() + QPointF(borderWidth, borderWidth));
}
 
QSGNode *QDeclarativeRectangleMapItemPrivateCPU::updateMapItemPaintNode(QSGNode *oldNode,
                                                            QQuickItem::UpdatePaintNodeData *data)
{
    Q_UNUSED(data);
    delete oldNode;
    if (m_geometry.isScreenDirty()) {
        m_geometry.markClean();
    }
    return nullptr;
}
 
bool QDeclarativeRectangleMapItemPrivateCPU::contains(const QPointF &point) const
{
    return m_shape->contains(m_rect.mapToItem(m_shape, point));
}
 
QT_END_NAMESPACE