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MapInColumnActivity.kt
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MapInColumnActivity.kt
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// Copyright 2021 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.maps.android.compose
import android.os.Bundle
import android.util.Log
import android.view.MotionEvent
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.animation.EnterTransition
import androidx.compose.animation.fadeOut
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.*
import androidx.compose.foundation.rememberScrollState
import androidx.compose.foundation.verticalScroll
import androidx.compose.material.CircularProgressIndicator
import androidx.compose.material.MaterialTheme
import androidx.compose.material.Surface
import androidx.compose.material.Text
import androidx.compose.runtime.*
import androidx.compose.ui.Alignment
import androidx.compose.ui.ExperimentalComposeUiApi
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.input.pointer.pointerInteropFilter
import androidx.compose.ui.platform.testTag
import androidx.compose.ui.unit.dp
import com.google.android.gms.maps.model.CameraPosition
import com.google.android.gms.maps.model.LatLng
import com.google.android.gms.maps.model.Marker
private const val TAG = "ScrollingMapActivity"
class MapInColumnActivity : ComponentActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContent {
// Observing and controlling the camera's state can be done with a CameraPositionState
val cameraPositionState = rememberCameraPositionState {
position = defaultCameraPosition
}
var columnScrollingEnabled by remember { mutableStateOf(true) }
// Use a LaunchedEffect keyed on the camera moving state to enable column scrolling when the camera stops moving
LaunchedEffect(cameraPositionState.isMoving) {
if (!cameraPositionState.isMoving) {
columnScrollingEnabled = true
Log.d(TAG, "Map camera stopped moving - Enabling column scrolling...")
}
}
MapInColumn(
modifier = Modifier.fillMaxSize(),
cameraPositionState,
columnScrollingEnabled = columnScrollingEnabled,
onMapTouched = {
columnScrollingEnabled = false
Log.d(
TAG,
"User touched map - Disabling column scrolling after user touched this Box..."
)
},
onMapLoaded = { }
)
}
}
}
@OptIn(ExperimentalComposeUiApi::class)
@Composable
fun MapInColumn(
modifier: Modifier = Modifier,
cameraPositionState: CameraPositionState,
columnScrollingEnabled: Boolean,
onMapTouched: () -> Unit,
onMapLoaded: () -> Unit,
) {
Surface(
modifier = modifier,
color = MaterialTheme.colors.background
) {
var isMapLoaded by remember { mutableStateOf(false) }
Column(
Modifier
.fillMaxSize()
.verticalScroll(
rememberScrollState(),
columnScrollingEnabled
),
horizontalAlignment = Alignment.Start
) {
Spacer(modifier = Modifier.padding(10.dp))
for (i in 1..20) {
Text(
text = "Item $i",
modifier = Modifier
.padding(start = 10.dp)
.testTag("Item $i")
)
}
Spacer(modifier = Modifier.padding(10.dp))
Box(
Modifier
.fillMaxWidth()
.height(200.dp)
) {
GoogleMapViewInColumn(
modifier = Modifier
.fillMaxSize()
.testTag("Map")
.pointerInteropFilter(
onTouchEvent = {
when (it.action) {
MotionEvent.ACTION_DOWN -> {
onMapTouched()
false
}
else -> {
Log.d(
TAG,
"MotionEvent ${it.action} - this never triggers."
)
true
}
}
}
),
cameraPositionState = cameraPositionState,
onMapLoaded = {
isMapLoaded = true
onMapLoaded()
},
)
if (!isMapLoaded) {
androidx.compose.animation.AnimatedVisibility(
modifier = Modifier
.fillMaxSize(),
visible = !isMapLoaded,
enter = EnterTransition.None,
exit = fadeOut()
) {
CircularProgressIndicator(
modifier = Modifier
.background(MaterialTheme.colors.background)
.wrapContentSize()
)
}
}
}
Spacer(modifier = Modifier.padding(10.dp))
for (i in 21..40) {
Text(
text = "Item $i",
modifier = Modifier
.padding(start = 10.dp)
.testTag("Item $i")
)
}
Spacer(modifier = Modifier.padding(10.dp))
}
}
}
@Composable
private fun GoogleMapViewInColumn(
modifier: Modifier,
cameraPositionState: CameraPositionState,
onMapLoaded: () -> Unit,
) {
val singaporeState = rememberMarkerState(position = singapore)
var uiSettings by remember { mutableStateOf(MapUiSettings(compassEnabled = false)) }
var mapProperties by remember {
mutableStateOf(MapProperties(mapType = MapType.NORMAL))
}
GoogleMap(
modifier = modifier,
cameraPositionState = cameraPositionState,
properties = mapProperties,
uiSettings = uiSettings,
onMapLoaded = onMapLoaded
) {
// Drawing on the map is accomplished with a child-based API
val markerClick: (Marker) -> Boolean = {
Log.d(TAG, "${it.title} was clicked")
cameraPositionState.projection?.let { projection ->
Log.d(TAG, "The current projection is: $projection")
}
false
}
MarkerInfoWindowContent(
state = singaporeState,
title = "Singapore",
onClick = markerClick,
draggable = true,
) {
Text(it.title ?: "Title", color = Color.Red)
}
}
}