PlaceClickActivity.kt

/*
 * Copyright 2026 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.example.maps3dcomposedemo

import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.unit.dp
import com.google.android.gms.maps3d.model.Map3DMode
import com.google.android.gms.maps3d.model.camera
import com.google.android.gms.maps3d.model.latLngAltitude
import com.google.maps.android.compose3d.GoogleMap3D

class PlaceClickActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            var clickedPlaceId by remember { mutableStateOf("") }
            PlaceClickScreen(clickedPlaceId) { placeId ->
                clickedPlaceId = placeId
            }
        }
    }
}

@Composable
fun PlaceClickScreen(clickedPlaceId: String, onPlaceClick: (String) -> Unit) {
    var isMapSteady by remember { mutableStateOf(false) }

    val empireStateCamera = remember {
        camera {
            center = latLngAltitude {
                latitude = 44.589994
                longitude = -104.715326
                altitude = 1508.9
            }
            tilt = 60.0
            heading = 1.0
            range = 5000.0
            roll = 0.0
        }
    }

    Box(
        modifier = Modifier
            .fillMaxSize()
            .semantics { contentDescription = if (isMapSteady) "MapSteady" else "MapLoading" },
    ) {
        GoogleMap3D(
            camera = empireStateCamera,
            mapMode = Map3DMode.HYBRID,
            modifier = Modifier.fillMaxSize(),
            onMapSteady = {
                isMapSteady = true
            },
            onPlaceClick = onPlaceClick,
        )

        if (clickedPlaceId.isNotEmpty()) {
            Text(
                text = "Clicked Place: $clickedPlaceId",
                modifier = Modifier
                    .align(Alignment.BottomCenter)
                    .padding(16.dp)
                    .background(Color.White)
                    .padding(8.dp)
                    .semantics { contentDescription = "ClickedPlaceText" },
            )
        }
    }
}