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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GPG Key ID: F7FCF2DD25C71357
4 changed files with 22 additions and 20 deletions
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0
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,
computeViewPoint: (canvasSize: DpSize) -> MapViewPoint,
features: Map<FeatureId, MapFeature>,
onClick: (GeodeticMapCoordinates) -> Unit = {},
onClick: MapViewPoint.() -> Unit = {},
//TODO consider replacing by modifier
config: MapViewConfig = MapViewConfig(),
modifier: Modifier = Modifier.fillMaxSize(),
@ -31,7 +31,7 @@ fun MapView(
mapTileProvider: MapTileProvider,
initialViewPoint: MapViewPoint,
features: Map<FeatureId, MapFeature> = emptyMap(),
onClick: (GeodeticMapCoordinates) -> Unit = {},
onClick: MapViewPoint.() -> Unit = {},
config: MapViewConfig = MapViewConfig(),
modifier: Modifier = Modifier.fillMaxSize(),
buildFeatures: @Composable (FeatureBuilder.() -> Unit) = {},
@ -46,7 +46,7 @@ fun MapView(
mapTileProvider: MapTileProvider,
box: GmcBox,
features: Map<FeatureId, MapFeature> = emptyMap(),
onClick: (GeodeticMapCoordinates) -> Unit = {},
onClick: MapViewPoint.() -> Unit = {},
config: MapViewConfig = MapViewConfig(),
modifier: Modifier = Modifier.fillMaxSize(),
buildFeatures: @Composable (FeatureBuilder.() -> Unit) = {},

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

34
src/jvmMain/kotlin/centre/sciprog/maps/compose/MapViewJvm.kt
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@ -40,27 +40,29 @@ actual fun MapView(
mapTileProvider: MapTileProvider,
computeViewPoint: (canvasSize: DpSize) -> MapViewPoint,
features: Map<FeatureId, MapFeature>,
onClick: (GeodeticMapCoordinates) -> Unit,
onClick: MapViewPoint.() -> Unit,
config: MapViewConfig,
modifier: Modifier,
) {
var canvasSize by remember { mutableStateOf(DpSize(512.dp, 512.dp)) }
var viewPointOverride by remember { mutableStateOf<MapViewPoint?>(
if(config.inferViewBoxFromFeatures){
features.values.computeBoundingBox(1)?.let { box ->
val zoom = log2(
min(
canvasSize.width.value / box.width,
canvasSize.height.value / box.height
) * PI / mapTileProvider.tileSize
)
MapViewPoint(box.center, zoom)
var viewPointOverride: MapViewPoint? by remember {
mutableStateOf(
if (config.inferViewBoxFromFeatures) {
features.values.computeBoundingBox(1)?.let { box ->
val zoom = log2(
min(
canvasSize.width.value / box.width,
canvasSize.height.value / box.height
) * PI / mapTileProvider.tileSize
)
MapViewPoint(box.center, zoom)
}
} else {
null
}
} else {
null
}
) }
)
}
val viewPoint by derivedStateOf { viewPointOverride ?: computeViewPoint(canvasSize) }
@ -123,7 +125,7 @@ actual fun MapView(
} else {
val dragStart = change.position
val dpPos = DpOffset(dragStart.x.toDp(), dragStart.y.toDp())
onClick(dpPos.toGeodetic())
onClick(MapViewPoint(dpPos.toGeodetic(), viewPoint.zoom))
drag(change.id) { dragChange ->
val dragAmount = dragChange.position - dragChange.previousPosition
viewPointOverride = viewPoint.move(