Struct PointObject 

pub struct PointObject {
    pub tags: HashMap<String, String>,
    pub rotation: f64,
    pub symbol: Weak<RefCell<PointSymbol>>,
    /* private fields */
}

A point object placed at a single location on the map.

Fields

tags: HashMap<String, String>

The tags associated with the object

rotation: f64

Rotation of the symbol in radians.

symbol: Weak<RefCell<PointSymbol>>

Weak reference to the point symbol used to render this object.

Implementations

impl PointObject

pub fn new(symbol: Weak<RefCell<PointSymbol>>, geometry: Point) -> Self

Create a new point object with the given symbol and position.

pub fn get_geometry(&self) -> &Point

Get a shared reference to the point geometry.

Examples found in repository

examples/from_path.rs (line 41)

fn main() -> Result<(), Error> {
    let mut map = Omap::from_path("./example_data/from_path.omap")?;

    #[cfg(feature = "geo_ref")]
    {
        // we want to move the map center to the average position of all objects
        let old_transform = map.geo_referencing.get_transform();

        let mut mean_pos = Coord::zero();
        let mut num_coords = 0;
        for obj in map.parts.iter().flat_map(|part| part.iter_all_objects()) {
            match obj {
                MapObject::Point(object) => {
                    mean_pos = mean_pos + object.get_geometry().0;
                    num_coords += 1;
                }
                MapObject::Line(object) => {
                    let geometry = object.get_geometry(0.1)?;
                    mean_pos =
                        mean_pos + geometry.0.iter().copied().reduce(|sum, c| sum + c).unwrap();
                    num_coords += geometry.0.len();
                }
                MapObject::Area(object) => {
                    let geometry = object.get_geometry(0.1)?;
                    mean_pos = mean_pos
                        + geometry
                            .exterior()
                            .0
                            .iter()
                            .copied()
                            .reduce(|sum, c| sum + c)
                            .unwrap();
                    num_coords += geometry.exterior().0.len();
                }
                MapObject::Text(object) => {
                    match object.get_geometry() {
                        TextGeometry::SingleAnchor(coord) => mean_pos = mean_pos + *coord,
                        TextGeometry::WrapBox(wrap_box) => mean_pos = mean_pos + wrap_box.anchor,
                    }
                    num_coords += 1;
                }
            }
        }
        mean_pos = mean_pos / num_coords as f64;

        // now transform that into projected coords
        let mean_proj_pos = old_transform.to_projected(mean_pos);

        // get the new georef info for that position
        let new_gr = GeoRef::initialize(
            mean_proj_pos,
            map.geo_referencing.crs_type,
            2_469.,
            map.geo_referencing.scale_denominator,
        )
        .unwrap();

        // assign the new info
        map.geo_referencing = new_gr;

        // get the new map transform
        let new_transform = map.geo_referencing.get_transform();

        // transfrom every object out of the old map space to projected coords
        // and from projected coord to the new map space
        // NB! If the new projection were different than the old,
        // a transfrom between projections using a proj library like proj-core would be needed
        // and this function would return Err
        map.apply_affine_between(&old_transform, &new_transform)
            .unwrap();
    };

    println!("Map colors in order:");
    for color in map.colors.iter() {
        match color {
            Color::SpotColor(ref_cell) => {
                let b = ref_cell.try_borrow().unwrap();
                println!("{} with spot name {}", b.color_name, b.spotcolor_name);
            }
            Color::MixedColor(ref_cell) => {
                println!("{}", ref_cell.try_borrow().unwrap().color_name);
            }
        }
    }

    let erosion_gully = map
        .symbols
        .get_symbol_by_code(Code::new(107, 0, 0))
        .unwrap()
        .downgrade();

    let mut ls = LineObject::new(
        WeakLinePathSymbol::try_from(erosion_gully).unwrap(),
        // geometry coordinates are always in mm of paper
        LineString::new(vec![Coord { x: -60., y: -50. }, Coord { x: 60., y: -50. }]),
    );
    ls.tags.insert("Some Key".to_owned(), "My value".to_owned());

    map.parts.0[0].add_object(ls);

    let weak_symbol = map
        .symbols
        .get_symbol_by_name("Contour value")
        .unwrap()
        .downgrade();

    let ts = TextObject::new(
        Weak::<RefCell<TextSymbol>>::try_from(weak_symbol)
            .expect("The symbol type of Contour value is not Text"),
        TextGeometry::SingleAnchor(Coord { x: 0., y: 0. }),
        "This is the middle of the map".to_owned(),
    );
    map.parts.0[0].add_object(ts);

    map.write_to_file("./from_path_out.omap")
}

pub fn get_geometry_mut(&mut self) -> &mut Point

Get a mutable reference to the point geometry.

pub fn apply_affine(&mut self, transform: &AffineMapTransform)

Apply an affine coordinate transform to the point position.

pub fn into_geometry(self) -> Point

Consume this object and return its geometry.

Trait Implementations

impl Clone for PointObject

fn clone(&self) -> PointObject

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for PointObject

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<PointObject> for MapObject

fn from(value: PointObject) -> Self

Converts to this type from the input type.