Method updateHoverState

src/tools/edit_point_tool.cpp:777–863

}

void EditPointTool::updateHoverState(const MapCoordF& cursor_pos)
{
	HoverState new_hover_state = OverNothing;
	const Object* new_hover_object = nullptr;
	MapCoordVector::size_type new_hover_point = no_point;
	
	if (text_editor)
	{
		handle_offset = MapCoordF(0, 0);
	}
	else if (!map()->selectedObjects().empty())
	{
		if (map()->selectedObjects().size() <= max_objects_for_handle_display)
		{
			// Try to find object node.
			auto best_distance_sq = std::numeric_limits<double>::max();
			for (const auto* object : map()->selectedObjects())
			{
				MapCoordF handle_pos;
				auto hover_point = findHoverPoint(cur_map_widget->mapToViewport(cursor_pos), cur_map_widget, object, true, &handle_pos);
				if (hover_point == no_point)
					continue;
				
				auto distance_sq = cursor_pos.distanceSquaredTo(handle_pos);
				if (distance_sq < best_distance_sq)
				{
					new_hover_state |= OverObjectNode;
					new_hover_object = object;
					new_hover_point  = hover_point;
					best_distance_sq = distance_sq;
					handle_offset    = handle_pos - cursor_pos;
				}
			}
			
			if (!new_hover_state.testFlag(OverObjectNode))
			{
				// No object node found. Try to find path object edge.
				/// \todo De-duplicate: Copied from EditLineTool
				auto click_tolerance_sq = qPow(0.001 * cur_map_widget->getMapView()->pixelToLength(clickTolerance()), 2);
				
				for (auto object : map()->selectedObjects())
				{
					if (object->getType() == Object::Path)
					{
						PathObject* path = object->asPath();
						auto closest = path->findClosestPointTo(cursor_pos);
						
						if (closest.distance_squared >= +0.0 &&
						    closest.distance_squared < best_distance_sq &&
						    closest.distance_squared < qMax(click_tolerance_sq, qPow(path->getSymbol()->calculateLargestLineExtent(), 2)))
						{
							new_hover_state |= OverPathEdge;
							new_hover_object = path;
							new_hover_point  = closest.path_coord.index;
							best_distance_sq = closest.distance_squared;
							handle_offset    = closest.path_coord.pos - cursor_pos;
						}
					}