Add compass view

app/src/main/kotlin/com/mapzen/erasermap/presenter/MainPresenter.kt

@@ -37,6 +37,8 @@ public interface MainPresenter {
     public fun onResume()
     public fun onPause()
     public fun onFindMeButtonClick()
+    public fun onCompassClick()
     public fun getPeliasLocationProvider(): PeliasLocationProvider
     public fun onReroute(location: Location)
+    public fun onMapMotionEvent(): Boolean
 }

app/src/main/kotlin/com/mapzen/erasermap/presenter/MainPresenterImpl.kt

@@ -235,6 +235,10 @@ public open class MainPresenterImpl(val mapzenLocation: MapzenLocation, val bus:
         }
     }
 
+    override fun onCompassClick() {
+        mainViewController?.setMapRotation(0f)
+    }
+
     override fun getPeliasLocationProvider(): PeliasLocationProvider {
         return mapzenLocation
     }
@@ -290,4 +294,9 @@ public open class MainPresenterImpl(val mapzenLocation: MapzenLocation, val bus:
             mainViewController?.resumeRoutingMode(feature)
         }
     }
+
+    override fun onMapMotionEvent(): Boolean {
+        mainViewController?.rotateCompass()
+        return true
+    }
 }

app/src/main/kotlin/com/mapzen/erasermap/view/CompassView.kt

@@ -0,0 +1,32 @@
+package com.mapzen.erasermap.view
+
+import android.content.Context
+import android.util.AttributeSet
+import android.view.LayoutInflater
+import android.widget.ImageView
+import android.widget.RelativeLayout
+import com.mapzen.erasermap.R
+
+public class CompassView(context: Context, attrs: AttributeSet) : RelativeLayout(context, attrs) {
+
+    val background: ImageView by lazy { findViewById(R.id.background) as ImageView }
+    val compass: ImageView by lazy { findViewById(R.id.compass) as ImageView }
+
+    init {
+        (context.getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater)
+                .inflate(R.layout.view_compass, this, true)
+    }
+
+    override fun setRotation(rotation: Float) {
+        compass.rotation = rotation
+        if (alpha == 0f) {
+            alpha = 1f
+        }
+    }
+
+    public fun reset() {
+        val newRotation = if (compass.rotation < 180) 0f else 360f
+        compass.animate().setDuration(1000).rotation(newRotation)
+        animate().setDuration(1000).alpha(0f).setStartDelay(1000)
+    }
+}

app/src/main/kotlin/com/mapzen/erasermap/view/InstructionAdapter.kt

@@ -9,7 +9,7 @@ import android.widget.TextView
 import com.mapzen.erasermap.R
 import com.mapzen.erasermap.util.DisplayHelper
 import com.mapzen.valhalla.Instruction
-import java.util.*
+import java.util.ArrayList
 
 public class InstructionAdapter(val context: Context, val instructions: ArrayList<Instruction>,
         val pager: RouteModeView) : PagerAdapter() {
@@ -23,30 +23,26 @@ public class InstructionAdapter(val context: Context, val instructions: ArrayLis
         var iconId: Int = DisplayHelper.getRouteDrawable(context,
                 instruction.getIntegerInstruction())
         distance.distanceInMeters = instruction.distance
-        title.setText(instruction.getName())
+        title.text = instruction.getName()
         icon.setImageResource(iconId)
         if (position == 0) {
-            view.findViewById(R.id.left_arrow).setVisibility(View.INVISIBLE)
+            view.findViewById(R.id.left_arrow).visibility = View.INVISIBLE
         }
-        if (position == getCount() - 1) {
-            view.findViewById(R.id.right_arrow).setVisibility(View.INVISIBLE)
+        if (position == count - 1) {
+            view.findViewById(R.id.right_arrow).visibility = View.INVISIBLE
         }
         initArrowOnClickListeners(view, position)
         setTagId(view, position)
         container?.addView(view)
         return view
     }
 
-    fun getView(): View {
-        return this.getView()
-    }
-
     override fun getCount(): Int {
-        return instructions.size()
+        return instructions.size
     }
 
     private fun setTagId(view: View, position: Int) {
-        view.setTag(RouteModeView.VIEW_TAG + position)
+        view.tag = RouteModeView.VIEW_TAG + position
     }
 
     private fun initArrowOnClickListeners(view: View, position: Int) {
@@ -59,15 +55,15 @@ public class InstructionAdapter(val context: Context, val instructions: ArrayLis
     }
 
     public fun setBackgroundColorActive(view: View?) {
-        view?.setBackgroundColor(context.getResources().getColor(R.color.transparent_white))
+        view?.setBackgroundColor(context.resources.getColor(android.R.color.white))
     }
 
     public fun setBackgroundColorInactive(view: View?) {
-        view?.setBackgroundColor(context.getResources().getColor(R.color.transparent_light_gray))
+        view?.setBackgroundColor(context.resources.getColor(R.color.light_gray))
     }
 
     public fun setBackgroundColorArrived(view: View?) {
-        view?.setBackgroundColor(context.getResources().getColor(R.color.you_have_arrived))
+        view?.setBackgroundColor(context.resources.getColor(R.color.you_have_arrived))
     }
 
     override fun isViewFromObject(view: View?, `object`: Any?): Boolean {

app/src/main/kotlin/com/mapzen/erasermap/view/InstructionListActivity.kt

@@ -7,37 +7,47 @@ import android.view.View
 import android.widget.ListView
 import android.widget.TextView
 import com.mapzen.erasermap.R
-import java.util.ArrayList
 
 public class InstructionListActivity : AppCompatActivity() {
+    companion object {
+        @JvmStatic val EXTRA_STRINGS = "instruction_strings"
+        @JvmStatic val EXTRA_TYPES = "instruction_types"
+        @JvmStatic val EXTRA_DISTANCES = "instruction_distances"
+        @JvmStatic val EXTRA_REVERSE = "reverse"
+        @JvmStatic val EXTRA_DESTINATION = "destination"
+    }
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_instructions)
-        getSupportActionBar()?.hide()
+        supportActionBar?.hide()
         val listView = findViewById(R.id.instruction_list_view) as ListView
-        findViewById(R.id.route_reverse).setVisibility(View.GONE)
-        val bundle = getIntent()?.getExtras()
-        val instruction_strings: ArrayList<String>? = bundle?.getStringArrayList("instruction_strings")
-        val instruction_types: ArrayList<Int>? = bundle?.getIntegerArrayList("instruction_types")
-        val instruction_distances: ArrayList<Int>? = bundle?.getIntegerArrayList("instruction_distances")
-        val reverse : Boolean? = bundle?.getBoolean("reverse", true)
-        setHeaderOrigins(bundle, reverse)
-        if (instruction_strings != null) {
-            listView.setAdapter(DirectionListAdapter(this, instruction_strings, instruction_types, instruction_distances, reverse))
+        findViewById(R.id.route_reverse).visibility = View.GONE
+        val bundle = intent?.extras
+        val strings = bundle?.getStringArrayList(EXTRA_STRINGS)
+        val types = bundle?.getIntegerArrayList(EXTRA_TYPES)
+        val distances = bundle?.getIntegerArrayList(EXTRA_DISTANCES)
+        val destination = bundle?.getString(EXTRA_DESTINATION) ?: getString(R.string.destination)
+        val reverse = bundle?.getBoolean(EXTRA_REVERSE, true) ?: false
+        setHeaderOrigins(destination, reverse)
+        if (strings != null) {
+            listView.adapter = DirectionListAdapter(this, strings, types, distances, reverse)
             listView.setOnItemClickListener { parent, view, position, id ->
                 setResult(position)
                 finish()
             }
         }
     }
 
-    private fun setHeaderOrigins(bundle: Bundle?, reverse: Boolean?) {
-        if (reverse == true) {
-            (findViewById(R.id.starting_point) as TextView).setText(bundle?.getString("destination"))
-            (findViewById(R.id.destination) as TextView).setText(R.string.current_location)
+    private fun setHeaderOrigins(destination: String, reverse: Boolean) {
+        val startTextView = findViewById(R.id.starting_point) as TextView
+        val destinationTextView = findViewById(R.id.destination) as TextView
+        if (reverse) {
+            startTextView.text = destination
+            destinationTextView.setText(R.string.current_location)
         } else {
-            (findViewById(R.id.starting_point) as TextView).setText(R.string.current_location)
-            (findViewById(R.id.destination) as TextView).setText(bundle?.getString("destination"))
+            startTextView.setText(R.string.current_location)
+            destinationTextView.text = destination
         }
     }