80 lines
2.3 KiB
Kotlin
80 lines
2.3 KiB
Kotlin
package centre.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 androidx.compose.ui.unit.DpSize
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import centre.sciprog.maps.*
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import kotlin.math.PI
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import kotlin.math.log2
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import kotlin.math.min
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//TODO consider replacing by modifier
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data class MapViewConfig(
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val zoomSpeed: Double = 1.0 / 3.0,
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val inferViewBoxFromFeatures: Boolean = false,
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val onClick: MapViewPoint.() -> Unit = {},
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val onViewChange: MapViewPoint.() -> Unit = {},
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val onSelect: (GmcBox) -> Unit = {},
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val zoomOnSelect: Boolean = true
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)
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@Composable
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expect fun MapView(
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mapTileProvider: MapTileProvider,
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computeViewPoint: (canvasSize: DpSize) -> MapViewPoint,
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features: Map<FeatureId, MapFeature>,
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config: MapViewConfig = MapViewConfig(),
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modifier: Modifier = Modifier.fillMaxSize(),
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)
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@Composable
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fun MapView(
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mapTileProvider: MapTileProvider,
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initialViewPoint: MapViewPoint,
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features: Map<FeatureId, MapFeature> = emptyMap(),
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config: MapViewConfig = MapViewConfig(),
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modifier: Modifier = Modifier.fillMaxSize(),
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buildFeatures: @Composable (FeatureBuilder.() -> Unit) = {},
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) {
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val featuresBuilder = MapFeatureBuilder(features)
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featuresBuilder.buildFeatures()
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MapView(
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mapTileProvider,
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{ initialViewPoint },
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featuresBuilder.build(),
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config,
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modifier
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)
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}
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internal fun GmcBox.getComputeViewPoint(mapTileProvider: MapTileProvider): (canvasSize: DpSize) -> MapViewPoint = { canvasSize ->
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val zoom = log2(
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min(
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canvasSize.width.value / width,
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canvasSize.height.value / height
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) * PI / mapTileProvider.tileSize
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)
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MapViewPoint(center, zoom)
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}
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@Composable
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fun MapView(
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mapTileProvider: MapTileProvider,
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box: GmcBox,
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features: Map<FeatureId, MapFeature> = emptyMap(),
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config: MapViewConfig = MapViewConfig(),
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modifier: Modifier = Modifier.fillMaxSize(),
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buildFeatures: @Composable (FeatureBuilder.() -> Unit) = {},
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) {
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val featuresBuilder = MapFeatureBuilder(features)
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featuresBuilder.buildFeatures()
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MapView(
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mapTileProvider,
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box.getComputeViewPoint(mapTileProvider),
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featuresBuilder.build(),
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config,
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modifier
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)
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} |