Feature layer extrusion

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/* Copyright 2017 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.arcgisruntime.sample.featurelayerextrusion

import android.graphics.Color
import android.os.Bundle
import android.widget.Button
import androidx.appcompat.app.AppCompatActivity
import com.esri.arcgisruntime.ArcGISRuntimeEnvironment
import com.esri.arcgisruntime.data.ServiceFeatureTable
import com.esri.arcgisruntime.geometry.Point
import com.esri.arcgisruntime.geometry.SpatialReferences
import com.esri.arcgisruntime.layers.FeatureLayer
import com.esri.arcgisruntime.mapping.ArcGISScene
import com.esri.arcgisruntime.mapping.BasemapStyle
import com.esri.arcgisruntime.mapping.view.Camera
import com.esri.arcgisruntime.mapping.view.OrbitLocationCameraController
import com.esri.arcgisruntime.mapping.view.SceneView
import com.esri.arcgisruntime.symbology.Renderer
import com.esri.arcgisruntime.symbology.SimpleFillSymbol
import com.esri.arcgisruntime.symbology.SimpleLineSymbol
import com.esri.arcgisruntime.symbology.SimpleRenderer
import com.esri.arcgisruntime.sample.featurelayerextrusion.databinding.ActivityMainBinding

class MainActivity : AppCompatActivity() {

    // set flag for showing total population or population density
    private var showTotalPopulation = true

    private val activityMainBinding by lazy {
        ActivityMainBinding.inflate(layoutInflater)
    }

    private val sceneView: SceneView by lazy {
        activityMainBinding.sceneView
    }

    private val toggleButton: Button by lazy {
        activityMainBinding.toggleButton
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(activityMainBinding.root)

        // authentication with an API key or named user is required to access basemaps and other
        // location services
        ArcGISRuntimeEnvironment.setApiKey(BuildConfig.API_KEY)

        // get us census data as a service feature table
        val statesServiceFeatureTable =
            ServiceFeatureTable(resources.getString(R.string.us_census_feature_service))

        // add the service feature table to a feature layer
        val statesFeatureLayer = FeatureLayer(statesServiceFeatureTable)
        // set the feature layer to render dynamically to allow extrusion
        statesFeatureLayer.renderingMode = FeatureLayer.RenderingMode.DYNAMIC

        // create a scene and add it to the scene view
        val scene = ArcGISScene(BasemapStyle.ARCGIS_IMAGERY)
        sceneView.scene = scene

        // add the feature layer to the scene
        scene.operationalLayers.add(statesFeatureLayer)

        // define line and fill symbols for a simple renderer
        val lineSymbol = SimpleLineSymbol(SimpleLineSymbol.Style.SOLID, Color.BLACK, 1.0f)
        val fillSymbol = SimpleFillSymbol(SimpleFillSymbol.Style.SOLID, Color.BLUE, lineSymbol)
        val renderer = SimpleRenderer(fillSymbol)
        // set renderer extrusion mode to base height, which includes base height of each vertex in calculating z values
        renderer.sceneProperties.extrusionMode = Renderer.SceneProperties.ExtrusionMode.BASE_HEIGHT

        // set the simple renderer to the feature layer
        statesFeatureLayer.renderer = renderer

        // define a look at point for the camera at geographical center of the continental US
        val lookAtPoint = Point(-10974490.0, 4814376.0, 0.0, SpatialReferences.getWebMercator())
        // add a camera and set it to orbit the look at point
        val camera = Camera(lookAtPoint, 20000000.0, 0.0, 55.0, 0.0)
        val orbitCamera = OrbitLocationCameraController(lookAtPoint, 20000000.0)
        sceneView.cameraController = orbitCamera
        sceneView.setViewpointCamera(camera)

        // set button listener
        toggleButton.setOnClickListener {
            if (showTotalPopulation) {
                // divide total population by 10 to make data legible
                renderer.sceneProperties.extrusionExpression = "[POP2007] / 10"
                // change text of button to total pop
                toggleButton.text = resources.getString(R.string.total_pop)
                showTotalPopulation = false
            } else {
                // multiple population density by 5000 to make data legible
                renderer.sceneProperties.extrusionExpression = "[POP07_SQMI] * 5000"
                // change text of button to pop density
                toggleButton.text = resources.getString(R.string.density_pop)
                showTotalPopulation = true
            }
        }
        // click to set initial state
        toggleButton.performClick()
    }

    override fun onPause() {
        super.onPause()
        sceneView.pause()
    }

    override fun onResume() {
        super.onResume()
        sceneView.resume()
    }

    override fun onDestroy() {
        super.onDestroy()
        sceneView.dispose()
    }
}