State encapsulation #14
4
demo/maps/src/jvmMain/kotlin/AngleConversion.kt
Normal file
4
demo/maps/src/jvmMain/kotlin/AngleConversion.kt
Normal file
@ -0,0 +1,4 @@
|
||||
import kotlin.math.PI
|
||||
|
||||
fun Double.toDegrees() = this * 180 / PI
|
||||
|
||||
@ -7,6 +7,7 @@ import androidx.compose.runtime.*
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||||
import androidx.compose.ui.geometry.Offset
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||||
import androidx.compose.ui.geometry.Size
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||||
import androidx.compose.ui.graphics.Color
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||||
import androidx.compose.ui.graphics.PointMode
|
||||
import androidx.compose.ui.window.Window
|
||||
import androidx.compose.ui.window.application
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||||
import center.sciprog.maps.compose.*
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||||
@ -49,41 +50,42 @@ fun App() {
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||||
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||||
var centerCoordinates by remember { mutableStateOf<GeodeticMapCoordinates?>(null) }
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||||
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||||
// val markers = (1..1_000_000).map {
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||||
// val position = GeodeticMapCoordinates.ofDegrees(
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||||
// latitude = Random.nextDouble(-90.0, 90.0),
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||||
// longitude = Random.nextDouble(0.0, 180.0)
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// )
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||||
// MapDrawFeature(
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||||
// position = position,
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||||
// computeBoundingBox = {
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||||
// GmcBox.withCenter(
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||||
// center = position,
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||||
// width = Distance(0.001),
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||||
// height = Distance(0.001)
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||||
// )
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||||
// }
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||||
// ) {
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||||
// drawRoundRect(
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||||
// color = Color.Yellow,
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||||
// size = Size(1f, 1f)
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||||
// )
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||||
// }
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||||
// }
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||||
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||||
val pointOne = 55.568548 to 37.568604
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||||
var pointTwo by remember { mutableStateOf(55.929444 to 37.518434) }
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||||
val pointThree = 60.929444 to 37.518434
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val state = MapViewState(
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mapTileProvider = mapTileProvider,
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||||
computeViewPoint = { viewPoint },
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||||
initialViewPoint = viewPoint,
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||||
config = MapViewConfig(
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||||
inferViewBoxFromFeatures = true,
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||||
onViewChange = { centerCoordinates = focus },
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||||
onDrag = { start, end ->
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||||
if (start.focus.latitude.toDegrees() in (pointTwo.first - 0.05)..(pointTwo.first + 0.05) &&
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||||
start.focus.longitude.toDegrees() in (pointTwo.second - 0.05)..(pointTwo.second + 0.05)
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) {
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||||
pointTwo = pointTwo.first + (end.focus.latitude - start.focus.latitude).toDegrees() to
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pointTwo.second + (end.focus.longitude - start.focus.longitude).toDegrees()
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false// returning false, because when we are dragging circle we don't want to drag map
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} else true
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}
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)
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) {
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val pointOne = 55.568548 to 37.568604
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||||
val pointTwo = 55.929444 to 37.518434
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||||
val pointThree = 60.929444 to 37.518434
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||||
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||||
image(pointOne, Icons.Filled.Home)
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||||
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||||
points(
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points = listOf(
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55.742465 to 37.615812,
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55.742713 to 37.616370,
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55.742815 to 37.616659,
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||||
55.742320 to 37.617132,
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55.742086 to 37.616566,
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||||
55.741715 to 37.616716
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||||
),
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||||
pointMode = PointMode.Polygon
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||||
)
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||||
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||||
//remember feature Id
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||||
val circleId: FeatureId = circle(
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||||
centerCoordinates = pointTwo,
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@ -106,15 +108,9 @@ fun App() {
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||||
drawLine(start = Offset(-10f, 10f), end = Offset(10f, -10f), color = Color.Red)
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}
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||||
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||||
// markers.forEach { feature ->
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||||
// featureSelector {
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// feature
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// }
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||||
// }
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||||
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||||
arc(pointOne, Distance(10.0), 0f, PI)
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||||
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||||
line(pointOne, pointTwo)
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line(pointOne, pointTwo, id = "line")
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||||
text(pointOne, "Home", font = { size = 32f })
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||||
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||||
centerCoordinates?.let {
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||||
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||||
@ -3,6 +3,7 @@ package center.sciprog.maps.compose
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||||
import androidx.compose.runtime.Composable
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||||
import androidx.compose.ui.graphics.Color
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||||
import androidx.compose.ui.graphics.ImageBitmap
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import androidx.compose.ui.graphics.PointMode
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||||
import androidx.compose.ui.graphics.drawscope.DrawScope
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||||
import androidx.compose.ui.graphics.painter.Painter
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||||
import androidx.compose.ui.graphics.vector.ImageVector
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||||
@ -46,6 +47,18 @@ public class MapDrawFeature(
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||||
override fun getBoundingBox(zoom: Int): GmcBox = computeBoundingBox(zoom)
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}
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||||
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||||
public class MapPointsFeature(
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||||
public val points: List<GeodeticMapCoordinates>,
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override val zoomRange: IntRange = defaultZoomRange,
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public val stroke: Float = 2f,
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public val color: Color = Color.Red,
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public val pointMode: PointMode = PointMode.Points
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) : MapFeature {
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override fun getBoundingBox(zoom: Int): GmcBox {
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return GmcBox(points.first(), points.last())
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}
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}
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public class MapCircleFeature(
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public val center: GeodeticMapCoordinates,
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override val zoomRange: IntRange = defaultZoomRange,
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@ -4,6 +4,7 @@ import androidx.compose.runtime.Composable
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import androidx.compose.runtime.mutableStateMapOf
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import androidx.compose.runtime.snapshots.SnapshotStateMap
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import androidx.compose.ui.graphics.Color
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import androidx.compose.ui.graphics.PointMode
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import androidx.compose.ui.graphics.drawscope.DrawScope
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import androidx.compose.ui.graphics.vector.ImageVector
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import androidx.compose.ui.unit.DpSize
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@ -117,6 +118,15 @@ public fun MapFeatureBuilder.arc(
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)
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)
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public fun MapFeatureBuilder.points(
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points: List<Pair<Double, Double>>,
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zoomRange: IntRange = defaultZoomRange,
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stroke: Float = 2f,
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color: Color = Color.Red,
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pointMode: PointMode = PointMode.Points,
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id: FeatureId? = null
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): FeatureId = addFeature(id, MapPointsFeature(points.map { it.toCoordinates() }, zoomRange, stroke, color, pointMode))
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@Composable
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public fun MapFeatureBuilder.image(
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position: Pair<Double, Double>,
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@ -11,10 +11,15 @@ import kotlin.math.min
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//TODO consider replacing by modifier
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/**
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* @param onDrag - returns true if you want to drag a map and false, if you want to make map stationary.
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* start - is a point where drag begins, end is a point where drag ends
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*/
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public 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 onDrag: (start: MapViewPoint, end: MapViewPoint) -> Boolean = { _, _ -> true },
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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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@ -51,160 +51,166 @@ public actual fun MapView(
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mapViewState: MapViewState,
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modifier: Modifier,
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) {
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||||
@OptIn(ExperimentalComposeUiApi::class)
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val canvasModifier = modifier.pointerInput(Unit) {
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||||
forEachGesture {
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||||
awaitPointerEventScope {
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||||
fun Offset.toDpOffset() = DpOffset(x.toDp(), y.toDp())
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with(mapViewState) {
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||||
@OptIn(ExperimentalComposeUiApi::class)
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val canvasModifier = modifier.pointerInput(Unit) {
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||||
forEachGesture {
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||||
awaitPointerEventScope {
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||||
fun Offset.toDpOffset() = DpOffset(x.toDp(), y.toDp())
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||||
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||||
val event: PointerEvent = awaitPointerEvent()
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||||
event.changes.forEach { change ->
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||||
if (event.buttons.isPrimaryPressed) {
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//Evaluating selection frame
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if (event.keyboardModifiers.isShiftPressed) {
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mapViewState.selectRect = Rect(change.position, change.position)
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||||
drag(change.id) { dragChange ->
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||||
mapViewState.selectRect?.let { rect ->
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||||
val offset = dragChange.position
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||||
mapViewState.selectRect = Rect(
|
||||
min(offset.x, rect.left),
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||||
min(offset.y, rect.top),
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||||
max(offset.x, rect.right),
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||||
max(offset.y, rect.bottom)
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||||
val event: PointerEvent = awaitPointerEvent()
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||||
event.changes.forEach { change ->
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||||
if (event.buttons.isPrimaryPressed) {
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||||
//Evaluating selection frame
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||||
if (event.keyboardModifiers.isShiftPressed) {
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||||
selectRect = Rect(change.position, change.position)
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||||
drag(change.id) { dragChange ->
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||||
selectRect?.let { rect ->
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||||
val offset = dragChange.position
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||||
selectRect = Rect(
|
||||
min(offset.x, rect.left),
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||||
min(offset.y, rect.top),
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||||
max(offset.x, rect.right),
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||||
max(offset.y, rect.bottom)
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||||
)
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||||
}
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||||
}
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||||
selectRect?.let { rect ->
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||||
//Use selection override if it is defined
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||||
val gmcBox = GmcBox(
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||||
rect.topLeft.toDpOffset().toGeodetic(),
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||||
rect.bottomRight.toDpOffset().toGeodetic()
|
||||
)
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||||
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||||
config.onSelect(gmcBox)
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||||
if (config.zoomOnSelect) {
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||||
val newViewPoint = gmcBox.computeViewPoint(mapTileProvider).invoke(canvasSize)
|
||||
|
||||
config.onViewChange(newViewPoint)
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||||
viewPointInternal = newViewPoint
|
||||
}
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||||
selectRect = null
|
||||
}
|
||||
} else {
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||||
val dragStart = change.position
|
||||
val dpPos = DpOffset(dragStart.x.toDp(), dragStart.y.toDp())
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||||
config.onClick(
|
||||
MapViewPoint(
|
||||
dpPos.toGeodetic() ,
|
||||
viewPoint.zoom
|
||||
)
|
||||
)
|
||||
drag(change.id) { dragChange ->
|
||||
val dragAmount = dragChange.position - dragChange.previousPosition
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||||
val dpStart =
|
||||
DpOffset(
|
||||
dragChange.previousPosition.x.toDp(),
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||||
dragChange.previousPosition.y.toDp()
|
||||
)
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||||
val dpEnd = DpOffset(dragChange.position.x.toDp(), dragChange.position.y.toDp())
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||||
if (!config.onDrag(
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||||
MapViewPoint(dpStart.toGeodetic(), viewPoint.zoom),
|
||||
MapViewPoint(dpEnd.toGeodetic(), viewPoint.zoom)
|
||||
)
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||||
) return@drag
|
||||
val newViewPoint = viewPoint.move(
|
||||
-dragAmount.x.toDp().value / tileScale,
|
||||
+dragAmount.y.toDp().value / tileScale
|
||||
)
|
||||
config.onViewChange(newViewPoint)
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||||
viewPointInternal = newViewPoint
|
||||
}
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||||
}
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||||
mapViewState.selectRect?.let { rect ->
|
||||
//Use selection override if it is defined
|
||||
val gmcBox = with(mapViewState) {
|
||||
GmcBox(
|
||||
rect.topLeft.toDpOffset().toGeodetic(),
|
||||
rect.bottomRight.toDpOffset().toGeodetic()
|
||||
)
|
||||
}
|
||||
mapViewState.config.onSelect(gmcBox)
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||||
if (mapViewState.config.zoomOnSelect) {
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||||
val newViewPoint = gmcBox.computeViewPoint(mapViewState.mapTileProvider)
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||||
.invoke(mapViewState.canvasSize)
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||||
}
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||||
}
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||||
}
|
||||
}
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||||
}.onPointerEvent(PointerEventType.Scroll) {
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||||
val change = it.changes.first()
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||||
val (xPos, yPos) = change.position
|
||||
//compute invariant point of translation
|
||||
val invariant = DpOffset(xPos.toDp(), yPos.toDp()).toGeodetic()
|
||||
val newViewPoint = viewPoint.zoom(-change.scrollDelta.y.toDouble() * config.zoomSpeed, invariant)
|
||||
config.onViewChange(newViewPoint)
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||||
viewPointInternal = newViewPoint
|
||||
}.fillMaxSize()
|
||||
|
||||
mapViewState.config.onViewChange(newViewPoint)
|
||||
mapViewState.viewPointInternal = newViewPoint
|
||||
|
||||
// Load tiles asynchronously
|
||||
LaunchedEffect(viewPoint, canvasSize) {
|
||||
with(mapTileProvider) {
|
||||
val indexRange = 0 until 2.0.pow(zoom).toInt()
|
||||
|
||||
val left = centerCoordinates.x - canvasSize.width.value / 2 / tileScale
|
||||
val right = centerCoordinates.x + canvasSize.width.value / 2 / tileScale
|
||||
val horizontalIndices: IntRange = (toIndex(left)..toIndex(right)).intersect(indexRange)
|
||||
|
||||
val top = (centerCoordinates.y + canvasSize.height.value / 2 / tileScale)
|
||||
val bottom = (centerCoordinates.y - canvasSize.height.value / 2 / tileScale)
|
||||
val verticalIndices: IntRange = (toIndex(bottom)..toIndex(top)).intersect(indexRange)
|
||||
|
||||
mapTiles.clear()
|
||||
|
||||
for (j in verticalIndices) {
|
||||
for (i in horizontalIndices) {
|
||||
val id = TileId(zoom, i, j)
|
||||
//start all
|
||||
val deferred = loadTileAsync(id)
|
||||
//wait asynchronously for it to finish
|
||||
launch {
|
||||
try {
|
||||
mapTiles += deferred.await()
|
||||
} catch (ex: Exception) {
|
||||
if (ex !is CancellationException) {
|
||||
//displaying the error is maps responsibility
|
||||
logger.error(ex) { "Failed to load tile with id=$id" }
|
||||
}
|
||||
mapViewState.selectRect = null
|
||||
}
|
||||
} else {
|
||||
val dragStart = change.position
|
||||
val dpPos = DpOffset(dragStart.x.toDp(), dragStart.y.toDp())
|
||||
mapViewState.config.onClick(
|
||||
MapViewPoint(
|
||||
with(mapViewState) { dpPos.toGeodetic() },
|
||||
mapViewState.viewPoint.zoom
|
||||
)
|
||||
)
|
||||
drag(change.id) { dragChange ->
|
||||
val dragAmount = dragChange.position - dragChange.previousPosition
|
||||
val newViewPoint = mapViewState.viewPoint.move(
|
||||
-dragAmount.x.toDp().value / mapViewState.tileScale,
|
||||
+dragAmount.y.toDp().value / mapViewState.tileScale
|
||||
)
|
||||
mapViewState.config.onViewChange(newViewPoint)
|
||||
mapViewState.viewPointInternal = newViewPoint
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}.onPointerEvent(PointerEventType.Scroll) {
|
||||
val change = it.changes.first()
|
||||
val (xPos, yPos) = change.position
|
||||
//compute invariant point of translation
|
||||
val invariant = with(mapViewState) { DpOffset(xPos.toDp(), yPos.toDp()).toGeodetic() }
|
||||
val newViewPoint =
|
||||
mapViewState.viewPoint.zoom(-change.scrollDelta.y.toDouble() * mapViewState.config.zoomSpeed, invariant)
|
||||
mapViewState.config.onViewChange(newViewPoint)
|
||||
mapViewState.viewPointInternal = newViewPoint
|
||||
}.fillMaxSize()
|
||||
|
||||
|
||||
// Load tiles asynchronously
|
||||
LaunchedEffect(mapViewState.viewPoint, mapViewState.canvasSize) {
|
||||
with(mapViewState.mapTileProvider) {
|
||||
val indexRange = 0 until 2.0.pow(mapViewState.zoom).toInt()
|
||||
|
||||
val left =
|
||||
mapViewState.centerCoordinates.x - mapViewState.canvasSize.width.value / 2 / mapViewState.tileScale
|
||||
val right =
|
||||
mapViewState.centerCoordinates.x + mapViewState.canvasSize.width.value / 2 / mapViewState.tileScale
|
||||
val horizontalIndices: IntRange = (toIndex(left)..toIndex(right)).intersect(indexRange)
|
||||
|
||||
val top =
|
||||
(mapViewState.centerCoordinates.y + mapViewState.canvasSize.height.value / 2 / mapViewState.tileScale)
|
||||
val bottom =
|
||||
(mapViewState.centerCoordinates.y - mapViewState.canvasSize.height.value / 2 / mapViewState.tileScale)
|
||||
val verticalIndices: IntRange = (toIndex(bottom)..toIndex(top)).intersect(indexRange)
|
||||
|
||||
mapViewState.mapTiles.clear()
|
||||
|
||||
for (j in verticalIndices) {
|
||||
for (i in horizontalIndices) {
|
||||
val id = TileId(mapViewState.zoom, i, j)
|
||||
//start all
|
||||
val deferred = loadTileAsync(id)
|
||||
//wait asynchronously for it to finish
|
||||
launch {
|
||||
try {
|
||||
mapViewState.mapTiles += deferred.await()
|
||||
} catch (ex: Exception) {
|
||||
if (ex !is CancellationException) {
|
||||
//displaying the error is maps responsibility
|
||||
logger.error(ex) { "Failed to load tile with id=$id" }
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
Canvas(canvasModifier) {
|
||||
Canvas(canvasModifier) {
|
||||
if (mapViewState.canvasSize != size.toDpSize()) {
|
||||
mapViewState.canvasSize = size.toDpSize()
|
||||
logger.debug { "Recalculate canvas. Size: $size" }
|
||||
}
|
||||
clipRect {
|
||||
val tileSize = IntSize(
|
||||
ceil((mapViewState.mapTileProvider.tileSize.dp * mapViewState.tileScale.toFloat()).toPx()).toInt(),
|
||||
ceil((mapViewState.mapTileProvider.tileSize.dp * mapViewState.tileScale.toFloat()).toPx()).toInt()
|
||||
)
|
||||
mapViewState.mapTiles.forEach { (id, image) ->
|
||||
//converting back from tile index to screen offset
|
||||
val offset = IntOffset(
|
||||
(mapViewState.canvasSize.width / 2 + (mapViewState.mapTileProvider.toCoordinate(id.i).dp - mapViewState.centerCoordinates.x.dp) * mapViewState.tileScale.toFloat()).roundToPx(),
|
||||
(mapViewState.canvasSize.height / 2 + (mapViewState.mapTileProvider.toCoordinate(id.j).dp - mapViewState.centerCoordinates.y.dp) * mapViewState.tileScale.toFloat()).roundToPx()
|
||||
logger.debug { "Recalculate canvas. Size: $size" }
|
||||
}
|
||||
clipRect {
|
||||
val tileSize = IntSize(
|
||||
ceil((mapTileProvider.tileSize.dp * tileScale.toFloat()).toPx()).toInt(),
|
||||
ceil((mapTileProvider.tileSize.dp * tileScale.toFloat()).toPx()).toInt()
|
||||
)
|
||||
drawImage(
|
||||
image = image,
|
||||
dstOffset = offset,
|
||||
dstSize = tileSize
|
||||
mapTiles.forEach { (id, image) ->
|
||||
//converting back from tile index to screen offset
|
||||
val offset = IntOffset(
|
||||
(canvasSize.width / 2 + (mapTileProvider.toCoordinate(id.i).dp - centerCoordinates.x.dp) * tileScale.toFloat()).roundToPx(),
|
||||
(canvasSize.height / 2 + (mapTileProvider.toCoordinate(id.j).dp - centerCoordinates.y.dp) * tileScale.toFloat()).roundToPx()
|
||||
)
|
||||
drawImage(
|
||||
image = image,
|
||||
dstOffset = offset,
|
||||
dstSize = tileSize
|
||||
)
|
||||
}
|
||||
features.values.filter { zoom in it.zoomRange }.forEach { feature ->
|
||||
drawFeature(zoom, feature)
|
||||
}
|
||||
}
|
||||
selectRect?.let { rect ->
|
||||
drawRect(
|
||||
color = Color.Blue,
|
||||
topLeft = rect.topLeft,
|
||||
size = rect.size,
|
||||
alpha = 0.5f,
|
||||
style = Stroke(
|
||||
width = 2f,
|
||||
pathEffect = PathEffect.dashPathEffect(floatArrayOf(10f, 10f), 0f)
|
||||
)
|
||||
)
|
||||
}
|
||||
mapViewState.features.values.filter { mapViewState.zoom in it.zoomRange }.forEach { feature ->
|
||||
drawFeature(mapViewState.zoom, feature)
|
||||
}
|
||||
}
|
||||
mapViewState.selectRect?.let { rect ->
|
||||
drawRect(
|
||||
color = Color.Blue,
|
||||
topLeft = rect.topLeft,
|
||||
size = rect.size,
|
||||
alpha = 0.5f,
|
||||
style = Stroke(
|
||||
width = 2f,
|
||||
pathEffect = PathEffect.dashPathEffect(floatArrayOf(10f, 10f), 0f)
|
||||
)
|
||||
)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user