bool AbstractGeoPolygonGraphicsItem::configurePainter(GeoPainter *painter, const ViewportParams &viewport) const
{
QPen currentPen = painter->pen();
GeoDataStyle::ConstPtr style = this->style();
if (!style) {
painter->setPen( QPen() ); // "style-less" polygons: a 1px black solid line
}
else {
const GeoDataPolyStyle& polyStyle = style->polyStyle();
if (polyStyle.outline()) {
const GeoDataLineStyle& lineStyle = style->lineStyle();
// To save performance we avoid making changes to the painter's pen.
// So we first take a copy of the actual painter pen, make changes to it
// and only if the resulting pen is different from the actual pen
// we replace the painter's pen with our new pen.
// We want to avoid the mandatory detach in QPen::setColor(),
// so we carefully check whether applying the setter is needed
currentPen.setColor(lineStyle.paintedColor());
currentPen.setWidthF(lineStyle.width());
currentPen.setCapStyle(lineStyle.capStyle());
currentPen.setStyle(lineStyle.penStyle());
if (painter->pen().color() != currentPen.color()) {
painter->setPen(currentPen);
}
}
else {
// polygons without outline: Qt::NoPen (not drawn)
if (currentPen.style() != Qt::NoPen) {
painter->setPen(Qt::NoPen);
}
}
if (!polyStyle.fill()) {
painter->setBrush(Qt::transparent);
}
else {
const QColor paintedColor = polyStyle.paintedColor();
if (painter->brush().color() != paintedColor ||
painter->brush().style() != polyStyle.brushStyle()) {
if (!polyStyle.texturePath().isEmpty() || !polyStyle.textureImage().isNull()) {
GeoDataCoordinates coords = latLonAltBox().center();
qreal x, y;
viewport.screenCoordinates(coords, x, y);
QBrush brush(texture(polyStyle.texturePath(), paintedColor));
painter->setBrush(brush);
painter->setBrushOrigin(QPoint(x,y));
}
else {
painter->setBrush(QBrush(paintedColor, polyStyle.brushStyle()));
}
}
}
}
return true;
}
void GeoPolygonGraphicsItem::paint( GeoPainter* painter, const ViewportParams* viewport )
{
painter->save();
bool const isBuildingFrame = isDecoration();
bool const isBuildingRoof = !isDecoration() && !decorations().isEmpty();
QPen currentPen = painter->pen();
if ( !style() ) {
painter->setPen( QPen() );
}
else {
if ( !style()->polyStyle().outline() || isBuildingFrame ) {
currentPen.setColor( Qt::transparent );
}
else {
if ( currentPen.color() != style()->lineStyle().paintedColor() ||
currentPen.widthF() != style()->lineStyle().width() ) {
currentPen.setColor( style()->lineStyle().paintedColor() );
currentPen.setWidthF( style()->lineStyle().width() );
}
if ( currentPen.capStyle() != style()->lineStyle().capStyle() )
currentPen.setCapStyle( style()->lineStyle().capStyle() );
if ( currentPen.style() != style()->lineStyle().penStyle() )
currentPen.setStyle( style()->lineStyle().penStyle() );
}
if ( painter->pen() != currentPen )
painter->setPen( currentPen );
if ( !style()->polyStyle().fill() ) {
if ( painter->brush().color() != Qt::transparent )
painter->setBrush( QColor( Qt::transparent ) );
}
else {
if ( isBuildingFrame ) {
painter->setBrush( style()->polyStyle().paintedColor().darker(150) );
} else if ( painter->brush().color() != style()->polyStyle().paintedColor() ) {
QImage textureImage = style()->polyStyle().textureImage();
if( !textureImage.isNull()){
GeoDataCoordinates coords = latLonAltBox().center();
qreal x, y;
viewport->screenCoordinates(coords, x, y);
if (m_cachedTexturePath != style()->polyStyle().texturePath() || m_cachedTextureColor != style()->polyStyle().paintedColor() ) {
m_cachedTexture = QImage ( textureImage.size(), QImage::Format_ARGB32_Premultiplied );
m_cachedTexture.fill(style()->polyStyle().paintedColor());
QPainter imagePainter(&m_cachedTexture );
imagePainter.drawImage(0, 0, textureImage);
imagePainter.end();
m_cachedTexturePath = style()->polyStyle().texturePath();
m_cachedTextureColor = style()->polyStyle().paintedColor();
}
QBrush brush;
brush.setTextureImage(m_cachedTexture);
QTransform transform;
brush.setTransform(transform.translate(x,y));
painter->setBrush(brush);
} else {
painter->setBrush( style()->polyStyle().paintedColor() );
}
}
}
}
if ( isBuildingFrame || isBuildingRoof ) {
bool drawAccurate3D = false;
bool isCameraAboveBuilding = false;
QPointF offsetAtCorner = buildingOffset(QPointF(0, 0), viewport, &isCameraAboveBuilding);
qreal maxOffset = qMax( qAbs( offsetAtCorner.x() ), qAbs( offsetAtCorner.y() ) );
drawAccurate3D = painter->mapQuality() == HighQuality ? maxOffset > 5.0 : maxOffset > 8.0;
// Since subtracting one fully contained polygon from another results in a single
// polygon with a "connecting line" between the inner and outer part we need
// to first paint the inner area with no pen and then the outlines with the correct pen.
QVector<QPolygonF*> outlines;
QVector<QPolygonF*> innerPolygons;
QVector<QPolygonF*> polygons;
bool const hasInnerBoundaries = m_polygon ? !m_polygon->innerBoundaries().isEmpty() : false;
if (m_polygon) {
if (hasInnerBoundaries) {
screenPolygons(viewport, m_polygon, innerPolygons, outlines);
}
viewport->screenCoordinates(m_polygon->outerBoundary(), polygons);
} else if (m_ring) {
viewport->screenCoordinates(*m_ring, polygons);
}
if ( isBuildingFrame ) {
QVector<QPolygonF*> sides = (hasInnerBoundaries && drawAccurate3D && isCameraAboveBuilding) ? outlines : polygons;
foreach(QPolygonF* polygon, sides) {
if (polygon->isEmpty()) {
continue;
}
if ( drawAccurate3D && isCameraAboveBuilding ) {
// draw the building sides
int const size = polygon->size();
QPointF & a = (*polygon)[0];
QPointF shiftA = a + buildingOffset(a, viewport);
for (int i=1; i<size; ++i) {
QPointF const & b = (*polygon)[i];
QPointF const shiftB = b + buildingOffset(b, viewport);
QPolygonF buildingSide = QPolygonF() << a << shiftA << shiftB << b;
if (hasInnerBoundaries) {
//smoothen away our loss of antialiasing due to the QRegion Qt-bug workaround
painter->setPen(QPen(painter->brush().color(), 1.5));
}
painter->drawPolygon(buildingSide);
a = b;
shiftA = shiftB;
}
} else {
// don't draw the building sides - just draw the base frame instead
if (hasInnerBoundaries) {
QRegion clip(polygon->toPolygon());
foreach(QPolygonF* clipPolygon, innerPolygons) {
clip-=QRegion(clipPolygon->toPolygon());
}
painter->setClipRegion(clip);
}
painter->drawPolygon(*polygon);
}
}
} else if (isBuildingRoof) {
