70 lines
2.2 KiB
Kotlin
70 lines
2.2 KiB
Kotlin
package center.sciprog.maps.compose
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import androidx.compose.foundation.layout.fillMaxSize
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import androidx.compose.runtime.Composable
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import androidx.compose.ui.Modifier
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import center.sciprog.maps.coordinates.Gmc
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import center.sciprog.maps.features.*
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@Composable
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public expect fun MapView(
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viewScope: MapViewScope,
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features: FeatureGroup<Gmc>,
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modifier: Modifier = Modifier.fillMaxSize(),
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)
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/**
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* A builder for a Map with static features.
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*/
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@Composable
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public fun MapView(
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mapTileProvider: MapTileProvider,
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features: FeatureGroup<Gmc>,
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initialViewPoint: ViewPoint<Gmc>? = null,
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initialRectangle: Rectangle<Gmc>? = null,
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config: ViewConfig<Gmc> = ViewConfig(),
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modifier: Modifier = Modifier.fillMaxSize(),
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) {
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val mapState: MapViewScope = MapViewScope.remember(
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mapTileProvider,
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config,
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initialViewPoint = initialViewPoint,
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initialRectangle = initialRectangle ?: features.getBoundingBox(Float.MAX_VALUE),
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)
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MapView(mapState, features, modifier)
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}
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/**
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* Draw a map using convenient parameters. If neither [initialViewPoint], noe [initialRectangle] is defined,
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* use map features to infer view region.
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* @param initialViewPoint The view point of the map using center and zoom. Is used if provided
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* @param initialRectangle The rectangle to be used for view point computation. Used if [initialViewPoint] is not defined.
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* @param buildFeatures - a builder for features
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*/
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@Composable
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public fun MapView(
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mapTileProvider: MapTileProvider,
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initialViewPoint: ViewPoint<Gmc>? = null,
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initialRectangle: Rectangle<Gmc>? = null,
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config: ViewConfig<Gmc> = ViewConfig(),
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modifier: Modifier = Modifier.fillMaxSize(),
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buildFeatures: FeatureGroup<Gmc>.() -> Unit = {},
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) {
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val featureState = FeatureGroup.remember(WebMercatorSpace, buildFeatures)
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val mapState: MapViewScope = MapViewScope.remember(
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mapTileProvider,
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config,
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initialViewPoint = initialViewPoint,
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initialRectangle = initialRectangle ?: featureState.features.computeBoundingBox(
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WebMercatorSpace,
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Float.MAX_VALUE
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),
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)
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MapView(mapState, featureState, modifier)
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} |