/*

* Copyright 2018 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

*

* https://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.kotlindemos

import android.graphics.Bitmap

import android.graphics.Canvas

import android.graphics.Color

import android.graphics.drawable.Drawable

import android.os.Bundle

import android.os.Handler

import android.os.SystemClock

import android.text.SpannableString

import android.text.style.ForegroundColorSpan

import android.util.Log

import android.view.View

import android.view.animation.BounceInterpolator

import android.widget.CheckBox

import android.widget.ImageView

import android.widget.RadioGroup

import android.widget.SeekBar

import android.widget.SeekBar.OnSeekBarChangeListener

import android.widget.TextView

import android.widget.Toast

import androidx.annotation.ColorInt

import androidx.annotation.DrawableRes

import androidx.appcompat.app.AppCompatActivity

import androidx.core.content.res.ResourcesCompat

import androidx.core.graphics.drawable.DrawableCompat

import com.google.android.gms.maps.CameraUpdateFactory

import com.google.android.gms.maps.GoogleMap

import com.google.android.gms.maps.GoogleMap.InfoWindowAdapter

import com.google.android.gms.maps.GoogleMap.OnInfoWindowClickListener

import com.google.android.gms.maps.GoogleMap.OnInfoWindowCloseListener

import com.google.android.gms.maps.GoogleMap.OnInfoWindowLongClickListener

import com.google.android.gms.maps.GoogleMap.OnMarkerClickListener

import com.google.android.gms.maps.GoogleMap.OnMarkerDragListener

import com.google.android.gms.maps.SupportMapFragment

import com.google.android.gms.maps.model.BitmapDescriptor

import com.google.android.gms.maps.model.BitmapDescriptorFactory

import com.google.android.gms.maps.model.LatLng

import com.google.android.gms.maps.model.LatLngBounds

import com.google.android.gms.maps.model.Marker

import com.google.android.gms.maps.model.MarkerOptions

import java.util.ArrayList

import java.util.Random

/**

* This shows how to place markers on a map.

*/

class MarkerDemoActivity :

AppCompatActivity(),

OnMarkerClickListener,

OnInfoWindowClickListener,

OnMarkerDragListener,

OnInfoWindowLongClickListener,

OnInfoWindowCloseListener,

OnMapAndViewReadyListener.OnGlobalLayoutAndMapReadyListener {

private val TAG = MarkerDemoActivity::class.java.name

/** This is ok to be lateinit as it is initialised in onMapReady */

private lateinit var map: GoogleMap

/**

* Keeps track of the last selected marker (though it may no longer be selected). This is

* useful for refreshing the info window.

*

* Must be nullable as it is null when no marker has been selected

*/

private var lastSelectedMarker: Marker? = null

private val markerRainbow = ArrayList<Marker>()

/** map to store place names and locations */

private val places = mapOf(

"BRISBANE" to LatLng(-27.47093, 153.0235),

"MELBOURNE" to LatLng(-37.81319, 144.96298),

"DARWIN" to LatLng(-12.4634, 130.8456),

"SYDNEY" to LatLng(-33.87365, 151.20689),

"ADELAIDE" to LatLng(-34.92873, 138.59995),

"PERTH" to LatLng(-31.952854, 115.857342),

"ALICE_SPRINGS" to LatLng(-24.6980, 133.8807)

)

/** These can be lateinit as they are set in onCreate */

private lateinit var topText: TextView

private lateinit var rotationBar: SeekBar

private lateinit var flatBox: CheckBox

private lateinit var options: RadioGroup

private val random = Random()

/** Demonstrates customizing the info window and/or its contents. */

internal inner class CustomInfoWindowAdapter : InfoWindowAdapter {

// These are both view groups containing an ImageView with id "badge" and two

// TextViews with id "title" and "snippet".

private val window: View = layoutInflater.inflate(R.layout.custom_info_window, null)

private val contents: View = layoutInflater.inflate(R.layout.custom_info_contents, null)

override fun getInfoWindow(marker: Marker): View? {

if (options.checkedRadioButtonId != R.id.custom_info_window) {

// This means that getInfoContents will be called.

return null

}

render(marker, window)

return window

}

override fun getInfoContents(marker: Marker): View? {

if (options.checkedRadioButtonId != R.id.custom_info_contents) {

// This means that the default info contents will be used.

return null

}

render(marker, contents)

return contents

}

private fun render(marker: Marker, view: View) {

val badge = when (marker.title) {

"Brisbane" -> R.drawable.badge_qld

"Adelaide" -> R.drawable.badge_sa

"Sydney" -> R.drawable.badge_nsw

"Melbourne" -> R.drawable.badge_victoria

"Perth" -> R.drawable.badge_wa

in "Darwin Marker 1".."Darwin Marker 4" -> R.drawable.badge_nt

else -> 0 // Passing 0 to setImageResource will clear the image view.

}

view.findViewById<ImageView>(R.id.badge).setImageResource(badge)

// Set the title and snippet for the custom info window

val title: String? = marker.title

val titleUi = view.findViewById<TextView>(R.id.title)

if (title != null) {

// Spannable string allows us to edit the formatting of the text.

titleUi.text = SpannableString(title).apply {

setSpan(ForegroundColorSpan(Color.RED), 0, length, 0)

}

} else {

titleUi.text = ""

}

val snippet: String? = marker.snippet

val snippetUi = view.findViewById<TextView>(R.id.snippet)

if (snippet != null && snippet.length > 12) {

snippetUi.text = SpannableString(snippet).apply {

setSpan(ForegroundColorSpan(Color.MAGENTA), 0, 10, 0)

setSpan(ForegroundColorSpan(Color.BLUE), 12, snippet.length, 0)

}

} else {

snippetUi.text = ""

}

}

}

override fun onCreate(savedInstanceState: Bundle?) {

super.onCreate(savedInstanceState)

setContentView(R.layout.marker_demo)

topText = findViewById(R.id.top_text)

rotationBar = findViewById<SeekBar>(R.id.rotationSeekBar).apply {

max = 360

setOnSeekBarChangeListener(object: OnSeekBarChangeListener {

/** Called when the Rotation progress bar is moved */

override fun onProgressChanged(seekBar: SeekBar?, progress: Int, fromUser: Boolean) {

val rotation = seekBar?.progress?.toFloat()

checkReadyThen { markerRainbow.map { it.rotation = rotation ?: 0f } }

}

override fun onStartTrackingTouch(p0: SeekBar?) {

// do nothing

}

override fun onStopTrackingTouch(p0: SeekBar?) {

//do nothing

}

} )

}

flatBox = findViewById(R.id.flat)

options = findViewById<RadioGroup>(R.id.custom_info_window_options).apply {

setOnCheckedChangeListener { _, _ ->

if (lastSelectedMarker?.isInfoWindowShown == true) {

// Refresh the info window when the info window's content has changed.

// must deal with the possibility that lastSelectedMarker has changed in

// another thread between the null check and this line, do this with !!

lastSelectedMarker?.showInfoWindow()

}

}

}

val mapFragment = supportFragmentManager.findFragmentById(R.id.map) as SupportMapFragment

OnMapAndViewReadyListener(mapFragment, this)

}

/**

* This is the callback that is triggered when the GoogleMap has loaded and is ready for use

*/

override fun onMapReady(googleMap: GoogleMap?) {

// return early if the map was not initialised properly

map = googleMap ?: return

// create bounds that encompass every location we reference

val boundsBuilder = LatLngBounds.Builder()

// include all places we have markers for on the map

places.keys.map { place -> boundsBuilder.include(places.getValue(place)) }

val bounds = boundsBuilder.build()

with(map) {

// Hide the zoom controls as the button panel will cover it.

uiSettings.isZoomControlsEnabled = false

// Setting an info window adapter allows us to change the both the contents and

// look of the info window.

setInfoWindowAdapter(CustomInfoWindowAdapter())

// Set listeners for marker events. See the bottom of this class for their behavior.

setOnMarkerClickListener(this@MarkerDemoActivity)

setOnInfoWindowClickListener(this@MarkerDemoActivity)

setOnMarkerDragListener(this@MarkerDemoActivity)

setOnInfoWindowCloseListener(this@MarkerDemoActivity)

setOnInfoWindowLongClickListener(this@MarkerDemoActivity)

// Override the default content description on the view, for accessibility mode.

// Ideally this string would be localised.

setContentDescription("Map with lots of markers.")

moveCamera(CameraUpdateFactory.newLatLngBounds(bounds, 50))

}

// Add lots of markers to the googleMap.

addMarkersToMap()

}

/**

* Show all the specified markers on the map

*/

private fun addMarkersToMap() {

val placeDetailsMap = mutableMapOf(

// Uses a coloured icon

"BRISBANE" to PlaceDetails(

position = places.getValue("BRISBANE"),

title = "Brisbane",

snippet = "Population: 2,074,200",

icon = BitmapDescriptorFactory

.defaultMarker(BitmapDescriptorFactory.HUE_AZURE)

),

// Uses a custom icon with the info window popping out of the center of the icon.

"SYDNEY" to PlaceDetails(

position = places.getValue("SYDNEY"),

title = "Sydney",

snippet = "Population: 4,627,300",

icon = BitmapDescriptorFactory.fromResource(R.drawable.arrow),

infoWindowAnchorX = 0.5f,

infoWindowAnchorY = 0.5f

),

// Will create a draggable marker. Long press to drag.

"MELBOURNE" to PlaceDetails(

position = places.getValue("MELBOURNE"),

title = "Melbourne",

snippet = "Population: 4,137,400",

draggable = true

),

// Use a vector drawable resource as a marker icon.

"ALICE_SPRINGS" to PlaceDetails(

position = places.getValue("ALICE_SPRINGS"),

title = "Alice Springs",

icon = vectorToBitmap(

R.drawable.ic_android, Color.parseColor("#A4C639"))

),

// More markers for good measure

"PERTH" to PlaceDetails(

position = places.getValue("PERTH"),

title = "Perth",

snippet = "Population: 1,738,800"

),

"ADELAIDE" to PlaceDetails(

position = places.getValue("ADELAIDE"),

title = "Adelaide",

snippet = "Population: 1,213,000"

)

)

// add 4 markers on top of each other in Darwin with varying z-indexes

(0 until 4).map {

placeDetailsMap.put(

"DARWIN ${it + 1}", PlaceDetails(

position = places.getValue("DARWIN"),

title = "Darwin Marker ${it + 1}",

snippet = "z-index initially ${it + 1}",

zIndex = it.toFloat()

)

)

}

// place markers for each of the defined locations

placeDetailsMap.keys.map {

with(placeDetailsMap.getValue(it)) {

map.addMarker(MarkerOptions()

.position(position)

.title(title)

.snippet(snippet)

.icon(icon)

.infoWindowAnchor(infoWindowAnchorX, infoWindowAnchorY)

.draggable(draggable)

.zIndex(zIndex))

}

}

// Creates a marker rainbow demonstrating how to create default marker icons of different

// hues (colors).

val numMarkersInRainbow = 12

(0 until numMarkersInRainbow).mapTo(markerRainbow) {

map.addMarker(MarkerOptions().apply{

position(LatLng(

-30 + 10 * Math.sin(it * Math.PI / (numMarkersInRainbow - 1)),

135 - 10 * Math.cos(it * Math.PI / (numMarkersInRainbow - 1))))

title("Marker $it")

icon(BitmapDescriptorFactory.defaultMarker((it * 360 / numMarkersInRainbow)

.toFloat()))

flat(flatBox.isChecked)

rotation(rotationBar.progress.toFloat())

})

}

}

/**

* Demonstrates converting a [Drawable] to a [BitmapDescriptor],

* for use as a marker icon.

*/

private fun vectorToBitmap(@DrawableRes id : Int, @ColorInt color : Int): BitmapDescriptor {

val vectorDrawable: Drawable? = ResourcesCompat.getDrawable(resources, id, null)

if (vectorDrawable == null) {

Log.e(TAG, "Resource not found")

return BitmapDescriptorFactory.defaultMarker()

}

val bitmap = Bitmap.createBitmap(vectorDrawable.intrinsicWidth,

vectorDrawable.intrinsicHeight, Bitmap.Config.ARGB_8888)

val canvas = Canvas(bitmap)

vectorDrawable.setBounds(0, 0, canvas.width, canvas.height)

DrawableCompat.setTint(vectorDrawable, color)

vectorDrawable.draw(canvas)

return BitmapDescriptorFactory.fromBitmap(bitmap)

}

/** Called when the Clear button is clicked. */

@Suppress("UNUSED_PARAMETER")

fun onClearMap(view: View) {

checkReadyThen { map.clear() }

}

/** Called when the Reset button is clicked. */

@Suppress("UNUSED_PARAMETER")

fun onResetMap(view: View) {

checkReadyThen {

map.clear()

addMarkersToMap()

}

}

/** Called when the Flat check box is checked or unchecked */

@Suppress("UNUSED_PARAMETER")

fun onToggleFlat(view: View) {

checkReadyThen { markerRainbow.map { marker -> marker.isFlat = flatBox.isChecked } }

}

//

// Marker related listeners.

//

override fun onMarkerClick(marker : Marker): Boolean {

// Markers have a z-index that is settable and gettable.

marker.zIndex += 1.0f

Toast.makeText(this, "${marker.title} z-index set to ${marker.zIndex}",

Toast.LENGTH_SHORT).show()

lastSelectedMarker = marker

if (marker.position == places.getValue("PERTH")) {

// This causes the marker at Perth to bounce into position when it is clicked.

val handler = Handler()

val start = SystemClock.uptimeMillis()

val duration = 1500

val interpolator = BounceInterpolator()

handler.post(object : Runnable {

override fun run() {

val elapsed = SystemClock.uptimeMillis() - start

val t = Math.max(

1 - interpolator.getInterpolation(elapsed.toFloat() / duration), 0f)

marker.setAnchor(0.5f, 1.0f + 2 * t)

// Post again 16ms later.

if (t > 0.0) {

handler.postDelayed(this, 16)

}

}

})

} else if (marker.position == places.getValue("ADELAIDE")) {

// This causes the marker at Adelaide to change color and alpha.

marker.apply {

setIcon(BitmapDescriptorFactory.defaultMarker(random.nextFloat() * 360))

alpha = random.nextFloat()

}

}

// We return false to indicate that we have not consumed the event and that we wish

// for the default behavior to occur (which is for the camera to move such that the

// marker is centered and for the marker's info window to open, if it has one).

return false

}

override fun onInfoWindowClick(marker : Marker) {

Toast.makeText(this, "Click Info Window", Toast.LENGTH_SHORT).show()

}

override fun onInfoWindowClose(marker : Marker) {

Toast.makeText(this, "Close Info Window", Toast.LENGTH_SHORT).show()

}

override fun onInfoWindowLongClick(marker : Marker) {

Toast.makeText(this, "Info Window long click", Toast.LENGTH_SHORT).show()

}

override fun onMarkerDragStart(marker : Marker) {

topText.text = getString(R.string.on_marker_drag_start)

}

override fun onMarkerDragEnd(marker : Marker) {

topText.text = getString(R.string.on_marker_drag_end)

}

override fun onMarkerDrag(marker : Marker) {

topText.text = getString(R.string.on_marker_drag, marker.position.latitude, marker.position.longitude)

}

/**

* Checks if the map is ready, the executes the provided lambda function

*

* @param stuffToDo the code to be executed if the map is ready

*/

private fun checkReadyThen(stuffToDo : () -> Unit) {

if (!::map.isInitialized) {

Toast.makeText(this, R.string.map_not_ready, Toast.LENGTH_SHORT).show()

} else {

stuffToDo()

}

}

}

/**

* This stores the details of a place that used to draw a marker

*/

class PlaceDetails(

val position: LatLng,

val title: String = "Marker",

val snippet: String? = null,

val icon: BitmapDescriptor = BitmapDescriptorFactory.defaultMarker(),

val infoWindowAnchorX: Float = 0.5F,

val infoWindowAnchorY: Float = 0F,

val draggable: Boolean = false,

val zIndex: Float = 0F)