Struct MapRegistry 

pub struct MapRegistry {
    pub maps: BTreeMap<String, MapData>,
}

The maps a chart can draw.

The registry is what turns a map series into a picture: the series names the map it wants, and the registry holds the geometry. The geometry is kept out of the option on purpose — a map of a country is megabytes of coordinates, and it is the same for every chart that draws it.

Fields

maps: BTreeMap<String, MapData>

The maps of the registry, by name.

Implementations

impl MapRegistry

Inherent implementation of MapRegistry.

pub fn new() -> Self

Returns an empty registry.

pub fn register(&mut self, data: MapData) -> &mut Self

Adds a map to the registry, replacing the one of the same name.

Arguments

• MapData - A MapData parameter.

Returns

• &mut Self - A mut Self value.

pub fn register_geojson( &mut self, name: &str, value: &DataValue, ) -> Result<&mut Self, GeoError>

Reads a GeoJSON document and adds the map it holds.

Arguments

• &str - Shared reference to a str.
• &DataValue - Shared reference to a DataValue.

Returns

• Result<&mut Self, GeoError> - Result of the operation; an Err variant on failure.

pub fn get(&self, name: &str) -> Option<&MapData>

Returns the map with the given name.

Arguments

• &str - Shared reference to a str.

Returns

• Option<&MapData> - Some(...) on success, None otherwise.

pub fn names(&self) -> Vec<String>

Returns the names of the maps of the registry.

Returns

• Vec<String> - A Vec<String> value.

pub fn len(&self) -> usize

Returns the number of maps in the registry.

Returns

• usize - A non-negative integer.

pub fn is_empty(&self) -> bool

Returns true when the registry holds no map.

Returns

• bool - A boolean.

pub fn clear(&mut self)

Removes every map from the registry.

impl MapRegistry

pub fn get_maps(&self) -> &BTreeMap<String, MapData>

pub fn get_mut_maps(&mut self) -> &mut BTreeMap<String, MapData>

pub fn set_maps(&mut self, val: BTreeMap<String, MapData>) -> &mut Self

Trait Implementations

impl Clone for MapRegistry

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MapRegistry

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

Formats the value using the given formatter.

impl Default for MapRegistry

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for MapRegistry

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for MapRegistry