kscience/maps-kt
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OnClick returns MapViewPoint

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Alexander Nozik 2022-07-15 09:31:51 +03:00
parent 5984de70b4
commit ec2dcdccaa
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4 changed files with 22 additions and 20 deletions
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README.md Normal file
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6
src/commonMain/kotlin/centre/sciprog/maps/compose/MapView.kt
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@ -20,7 +20,7 @@ expect fun MapView(
mapTileProvider: MapTileProvider, mapTileProvider: MapTileProvider,
computeViewPoint: (canvasSize: DpSize) -> MapViewPoint, computeViewPoint: (canvasSize: DpSize) -> MapViewPoint,
features: Map<FeatureId, MapFeature>, features: Map<FeatureId, MapFeature>,
onClick: (GeodeticMapCoordinates) -> Unit = {}, onClick: MapViewPoint.() -> Unit = {},
//TODO consider replacing by modifier //TODO consider replacing by modifier
config: MapViewConfig = MapViewConfig(), config: MapViewConfig = MapViewConfig(),
modifier: Modifier = Modifier.fillMaxSize(), modifier: Modifier = Modifier.fillMaxSize(),
@ -31,7 +31,7 @@ fun MapView(
mapTileProvider: MapTileProvider, mapTileProvider: MapTileProvider,
initialViewPoint: MapViewPoint, initialViewPoint: MapViewPoint,
features: Map<FeatureId, MapFeature> = emptyMap(), features: Map<FeatureId, MapFeature> = emptyMap(),
onClick: (GeodeticMapCoordinates) -> Unit = {}, onClick: MapViewPoint.() -> Unit = {},
config: MapViewConfig = MapViewConfig(), config: MapViewConfig = MapViewConfig(),
modifier: Modifier = Modifier.fillMaxSize(), modifier: Modifier = Modifier.fillMaxSize(),
buildFeatures: @Composable (FeatureBuilder.() -> Unit) = {}, buildFeatures: @Composable (FeatureBuilder.() -> Unit) = {},
@ -46,7 +46,7 @@ fun MapView(
mapTileProvider: MapTileProvider, mapTileProvider: MapTileProvider,
box: GmcBox, box: GmcBox,
features: Map<FeatureId, MapFeature> = emptyMap(), features: Map<FeatureId, MapFeature> = emptyMap(),
onClick: (GeodeticMapCoordinates) -> Unit = {}, onClick: MapViewPoint.() -> Unit = {},
config: MapViewConfig = MapViewConfig(), config: MapViewConfig = MapViewConfig(),
modifier: Modifier = Modifier.fillMaxSize(), modifier: Modifier = Modifier.fillMaxSize(),
buildFeatures: @Composable (FeatureBuilder.() -> Unit) = {}, buildFeatures: @Composable (FeatureBuilder.() -> Unit) = {},

2
src/jvmMain/kotlin/Main.kt
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@ -43,7 +43,7 @@ fun App() {
MapView( MapView(
mapTileProvider, mapTileProvider,
viewPoint, viewPoint,
onClick = { gmc -> coordinates = gmc }, onClick = { coordinates = focus },
config = MapViewConfig(inferViewBoxFromFeatures = true) config = MapViewConfig(inferViewBoxFromFeatures = true)
) { ) {
val pointOne = 55.568548 to 37.568604 val pointOne = 55.568548 to 37.568604

12
src/jvmMain/kotlin/centre/sciprog/maps/compose/MapViewJvm.kt
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@ -40,14 +40,15 @@ actual fun MapView(
mapTileProvider: MapTileProvider, mapTileProvider: MapTileProvider,
computeViewPoint: (canvasSize: DpSize) -> MapViewPoint, computeViewPoint: (canvasSize: DpSize) -> MapViewPoint,
features: Map<FeatureId, MapFeature>, features: Map<FeatureId, MapFeature>,
onClick: (GeodeticMapCoordinates) -> Unit, onClick: MapViewPoint.() -> Unit,
config: MapViewConfig, config: MapViewConfig,
modifier: Modifier, modifier: Modifier,
) { ) {
var canvasSize by remember { mutableStateOf(DpSize(512.dp, 512.dp)) } var canvasSize by remember { mutableStateOf(DpSize(512.dp, 512.dp)) }
var viewPointOverride by remember { mutableStateOf<MapViewPoint?>( var viewPointOverride: MapViewPoint? by remember {
if(config.inferViewBoxFromFeatures){ mutableStateOf(
if (config.inferViewBoxFromFeatures) {
features.values.computeBoundingBox(1)?.let { box -> features.values.computeBoundingBox(1)?.let { box ->
val zoom = log2( val zoom = log2(
min( min(
@ -60,7 +61,8 @@ actual fun MapView(
} else { } else {
null null
} }
) } )
}
val viewPoint by derivedStateOf { viewPointOverride ?: computeViewPoint(canvasSize) } val viewPoint by derivedStateOf { viewPointOverride ?: computeViewPoint(canvasSize) }
@ -123,7 +125,7 @@ actual fun MapView(
} else { } else {
val dragStart = change.position val dragStart = change.position
val dpPos = DpOffset(dragStart.x.toDp(), dragStart.y.toDp()) val dpPos = DpOffset(dragStart.x.toDp(), dragStart.y.toDp())
onClick(dpPos.toGeodetic()) onClick(MapViewPoint(dpPos.toGeodetic(), viewPoint.zoom))
drag(change.id) { dragChange -> drag(change.id) { dragChange ->
val dragAmount = dragChange.position - dragChange.previousPosition val dragAmount = dragChange.position - dragChange.previousPosition
viewPointOverride = viewPoint.move( viewPointOverride = viewPoint.move(