Display overview map

/* Copyright 2025 Esri
 *
 * 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.esri.arcgismaps.sample.displayoverviewmap

import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.activity.enableEdgeToEdge
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Surface
import androidx.compose.runtime.Composable
import com.arcgismaps.ApiKey
import com.arcgismaps.ArcGISEnvironment
import com.esri.arcgismaps.sample.sampleslib.theme.SampleAppTheme
import com.esri.arcgismaps.sample.displayoverviewmap.screens.DisplayOverviewMapScreen

class MainActivity : ComponentActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        // authentication with an API key or named user is
        // required to access basemaps and other location services
        ArcGISEnvironment.apiKey = ApiKey.create(BuildConfig.ACCESS_TOKEN)

        enableEdgeToEdge()
        setContent {
            SampleAppTheme {
                DisplayOverviewMapApp()
            }
        }
    }

    @Composable
    private fun DisplayOverviewMapApp() {
        Surface(color = MaterialTheme.colorScheme.background) {
            DisplayOverviewMapScreen(
                sampleName = getString(R.string.display_overview_map_app_name)
            )
        }
    }
}

/* Copyright 2025 Esri
 *
 * 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.esri.arcgismaps.sample.displayoverviewmap.components

import android.app.Application
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.setValue
import androidx.lifecycle.AndroidViewModel
import androidx.lifecycle.viewModelScope
import com.arcgismaps.data.ServiceFeatureTable
import com.arcgismaps.geometry.Polygon
import com.arcgismaps.mapping.ArcGISMap
import com.arcgismaps.mapping.BasemapStyle
import com.arcgismaps.mapping.Viewpoint
import com.arcgismaps.mapping.layers.FeatureLayer
import com.esri.arcgismaps.sample.sampleslib.components.MessageDialogViewModel
import kotlinx.coroutines.launch

class DisplayOverviewMapViewModel(app: Application) : AndroidViewModel(app) {

    private val initialViewpoint = Viewpoint(latitude = 50.431999, longitude = -104.607293, scale = 10e3)

    // the current viewpoint of the map
    var viewpoint by mutableStateOf(initialViewpoint)
    // the current visible area of the map
    var visibleArea: Polygon? by mutableStateOf(null)

    // set up feature layer
    private val touristAttractionsUrl =
        "https://services6.arcgis.com/Do88DoK2xjTUCXd1/arcgis/rest/services/OSM_NA_Tourism/FeatureServer/0"
    private val touristAttractionsTable = ServiceFeatureTable(touristAttractionsUrl)
    private val featureLayerTouristAttractions = FeatureLayer.createWithFeatureTable(touristAttractionsTable)

    // the map used by MapView
    val arcGISMap = ArcGISMap(BasemapStyle.ArcGISTopographic).apply {
        initialViewpoint = viewpoint
        // add tourist attractions feature layer to the map
        operationalLayers.add(featureLayerTouristAttractions)
    }

    // Create a message dialog view model for handling error messages
    val messageDialogVM = MessageDialogViewModel()

    init {
        viewModelScope.launch {
            arcGISMap.load().onFailure { messageDialogVM.showMessageDialog(it) }
        }
    }
}

/* Copyright 2025 Esri
 *
 * 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.esri.arcgismaps.sample.displayoverviewmap.screens

import androidx.compose.foundation.border
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Scaffold
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.unit.dp
import androidx.lifecycle.viewmodel.compose.viewModel
import com.arcgismaps.toolkit.geoviewcompose.MapView
import com.arcgismaps.toolkit.geoviewcompose.OverviewMap
import com.esri.arcgismaps.sample.displayoverviewmap.components.DisplayOverviewMapViewModel
import com.esri.arcgismaps.sample.sampleslib.components.MessageDialog
import com.esri.arcgismaps.sample.sampleslib.components.SampleTopAppBar

/**
 * Main screen layout for the sample app
 */
@Composable
fun DisplayOverviewMapScreen(sampleName: String) {
    val mapViewModel: DisplayOverviewMapViewModel = viewModel()

    Scaffold(
        topBar = { SampleTopAppBar(title = sampleName) },
        content = {
            Box (
                modifier = Modifier
                    .fillMaxSize()
                    .padding(it),
            ) {
                MapView(
                    modifier = Modifier.fillMaxSize(),
                    arcGISMap = mapViewModel.arcGISMap,
                    onViewpointChangedForCenterAndScale = {
                        mapViewModel.viewpoint = it
                    },
                    onVisibleAreaChanged = {
                        mapViewModel.visibleArea = it
                    }
                )
                OverviewMap(
                    viewpoint = mapViewModel.viewpoint,
                    visibleArea = mapViewModel.visibleArea,
                    modifier = Modifier
                        .size(250.dp, 200.dp)
                        .padding(20.dp)
                        .border(width = 2.dp, color = MaterialTheme.colorScheme.primary)
                        .align(Alignment.TopEnd)
                )
            }

            mapViewModel.messageDialogVM.apply {
                if (dialogStatus) {
                    MessageDialog(
                        title = messageTitle,
                        description = messageDescription,
                        onDismissRequest = ::dismissDialog
                    )
                }
            }
        }
    )
}