/*!
\internal
*/
void QGeoMapRectangleGeometry::updatePoints(const QGeoMap &map,
const QGeoCoordinate &topLeft,
const QGeoCoordinate &bottomRight)
{
if (!screenDirty_ && !sourceDirty_)
return;
QDoubleVector2D tl = map.coordinateToItemPosition(topLeft, false);
QDoubleVector2D br = map.coordinateToItemPosition(bottomRight, false);
// 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(tl.x()) || !qIsFinite(tl.y()))
return;
if (!qIsFinite(br.x()) || !qIsFinite(br.y()))
return;
if ( preserveGeometry_ ) {
double unwrapBelowX = map.coordinateToItemPosition(geoLeftBound_, false).x();
if (br.x() < unwrapBelowX)
br.setX(tl.x() + screenBounds_.width());
}
QRectF re(tl.toPointF(), br.toPointF());
re.translate(-1 * tl.toPointF());
clear();
screenVertices_.reserve(6);
screenVertices_ << re.topLeft();
screenVertices_ << re.topRight();
screenVertices_ << re.bottomLeft();
screenVertices_ << re.topRight();
screenVertices_ << re.bottomLeft();
screenVertices_ << re.bottomRight();
firstPointOffset_ = QPointF(0,0);
srcOrigin_ = topLeft;
screenBounds_ = re;
screenOutline_ = QPainterPath();
screenOutline_.addRect(re);
geoLeftBound_ = topLeft;
}
/*!
\internal
*/
void QGeoMapCircleGeometry::updateScreenPointsInvert(const QGeoMap &map)
{
if (!screenDirty_)
return;
if (map.width() == 0 || map.height() == 0) {
clear();
return;
}
QPointF origin = map.coordinateToItemPosition(srcOrigin_, false).toPointF();
QPainterPath ppi = srcPath_;
clear();
// a circle 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();
// calculate actual width of map on screen in pixels
QGeoCoordinate mapCenter(0, map.cameraData().center().longitude());
QDoubleVector2D midPoint = map.coordinateToItemPosition(mapCenter, false);
QDoubleVector2D midPointPlusOne = QDoubleVector2D(midPoint.x() + 1.0, midPoint.y());
QGeoCoordinate coord1 = map.itemPositionToCoordinate(midPointPlusOne, false);
double geoDistance = coord1.longitude() - map.cameraData().center().longitude();
if ( geoDistance < 0 )
geoDistance += 360.0;
double mapWidth = 360.0 / geoDistance;
qreal leftOffset = origin.x() - (map.width()/2.0 - mapWidth/2.0) - firstPointOffset_.x();
qreal topOffset = origin.y() - (midPoint.y() - mapWidth/2.0) - firstPointOffset_.y();
QPainterPath ppiBorder;
ppiBorder.moveTo(QPointF(-leftOffset, -topOffset));
ppiBorder.lineTo(QPointF(mapWidth - leftOffset, -topOffset));
ppiBorder.lineTo(QPointF(mapWidth - leftOffset, mapWidth - topOffset));
ppiBorder.lineTo(QPointF(-leftOffset, mapWidth - topOffset));
screenOutline_ = ppiBorder;
std::vector<p2t::Point*> borderPts;
borderPts.reserve(4);
std::vector<p2t::Point*> curPts;
curPts.reserve(ppi.elementCount());
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 - curPts.front()->x) < 0.1
&& qAbs(e.y - curPts.front()->y) < 0.1)) {
if (curPts.size() > 2) {
for (int j = 0; j < 4; ++j) {
const QPainterPath::Element e2 = ppiBorder.elementAt(j);
borderPts.push_back(new p2t::Point(e2.x, e2.y));
}
p2t::CDT *cdt = new p2t::CDT(borderPts);
cdt->AddHole(curPts);
cdt->Triangulate();
std::vector<p2t::Triangle*> tris = cdt->GetTriangles();
screenVertices_.reserve(screenVertices_.size() + int(tris.size()));
for (size_t i = 0; i < tris.size(); ++i) {
p2t::Triangle *t = tris.at(i);
for (int j = 0; j < 3; ++j) {
p2t::Point *p = t->GetPoint(j);
screenVertices_ << QPointF(p->x, p->y);
}
}
delete cdt;
}
curPts.clear();
curPts.reserve(ppi.elementCount() - i);
curPts.push_back(new p2t::Point(e.x, e.y));
} else if (e.isLineTo()) {
curPts.push_back(new p2t::Point(e.x, e.y));
} else {
qWarning("Unhandled element type in circle painterpath");
}
}
if (curPts.size() > 0) {
qDeleteAll(curPts.begin(), curPts.end());
curPts.clear();
}
if (borderPts.size() > 0) {
qDeleteAll(borderPts.begin(), borderPts.end());
borderPts.clear();
}
screenBounds_ = ppiBorder.boundingRect();
}
