void TerrainProfileGraph::redrawGraph()
{
_scene->clear();
_graphLines.clear();
_graphField.setCoords(0, 0, 0, 0);
_hoverLine = 0L;
const osgEarth::Util::TerrainProfile profile = _calculator->getProfile();
if (profile.getNumElevations() > 0)
{
double minElevation, maxElevation;
profile.getElevationRanges( minElevation, maxElevation );
_totalDistance = profile.getTotalDistance();
int mag = (int)pow(10.0, (double)((int)log10(maxElevation - minElevation)));
_graphMinY = ((int)(minElevation / mag) - (minElevation < 0 ? 1 : 0)) * mag;
_graphMaxY = ((int)(maxElevation / mag) + (maxElevation < 0 ? 0 : 1)) * mag;
int graphRangeY = _graphMaxY - _graphMinY;
double scale = (double)graphRangeY / 10.0;
drawAxes(_graphMinY, _graphMaxY, scale, _totalDistance, _graphField);
double lastX = _graphField.x();
double lastY = (1.0 - ((profile.getElevation(0) - _graphMinY) / graphRangeY)) * _graphField.height() + _graphField.y();
QPolygonF graphPoly;
graphPoly << QPointF(_graphField.x(), _graphField.y() + _graphField.height());
graphPoly << QPointF(lastX, lastY);
for (unsigned int i = 0; i < profile.getNumElevations(); i++)
{
double distance = profile.getDistance( i );
double elevation = profile.getElevation( i );
double x = (distance / _totalDistance) * _graphField.width() + _graphField.x();
double y = (1.0 - ((elevation - _graphMinY) / graphRangeY)) * _graphField.height() + _graphField.y();
graphPoly << QPointF(x, y);
QLineF line(lastX, lastY, x, y);
_graphLines.push_back(line);
_scene->addLine(line, _linePen)->setZValue(GRAPH_Z);
lastX = x;
lastY = y;
}
// Add gradient polygon beneath the graph line
graphPoly << QPointF(_graphField.x() + _graphField.width(), _graphField.y() + _graphField.height());
QLinearGradient polyGrad(0, 0, 0, (_graphField.y() + _graphField.height()) * 1.25);
polyGrad.setColorAt(0, _graphFillColor);
polyGrad.setColorAt(1, QColor(255, 255, 255, 0));
polyGrad.setSpread(QGradient::PadSpread);
_scene->addPolygon(graphPoly, QPen(Qt::NoPen), QBrush(polyGrad))->setZValue(GRAPH_Z - 1);
}
}
void TerrainProfileGraph::onCopyToClipboard()
{
const osgEarth::Util::TerrainProfile profile = _calculator->getProfile();
if (profile.getNumElevations() > 0)
{
const QLatin1String fieldSeparator(",");
GeoPoint startPt = _calculator->getStart(ALTMODE_ABSOLUTE);
GeoPoint endPt = _calculator->getEnd(ALTMODE_ABSOLUTE);
QString profileInfo = QString("Start:,%1,%2\nEnd:,%3,%4\n")
.arg(_coordinateFormatter->format(startPt).c_str()).arg(startPt.alt())
.arg(_coordinateFormatter->format(endPt).c_str()).arg(endPt.alt());
QString distanceInfo("Distance:");
QString elevationInfo("Elevation:");
for (unsigned int i = 0; i < profile.getNumElevations(); i++)
{
distanceInfo += fieldSeparator + QString::number(profile.getDistance(i));
elevationInfo += fieldSeparator + QString::number(profile.getElevation(i));
}
profileInfo += distanceInfo + QString("\n") + elevationInfo;
QImage graphImage(_graphWidth, _graphHeight, QImage::Format_RGB32);
QPainter p;
p.begin(&graphImage);
_scene->render(&p);
p.end();
QMimeData* clipData = new QMimeData();
clipData->setText(profileInfo);
clipData->setImageData(graphImage);
QApplication::clipboard()->setMimeData(clipData);
}
}