Android DPad Direction

android/app/src/main/java/com/metallic/chiaki/touchcontrols/ControlsBackgroundView.kt

@@ -0,0 +1,30 @@
+/*
+ * This file is part of Chiaki.
+ *
+ * Chiaki is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Chiaki is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Chiaki.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.metallic.chiaki.touchcontrols
+
+import android.content.Context
+import android.util.AttributeSet
+import android.view.MotionEvent
+import android.view.View
+
+class ControlsBackgroundView @JvmOverloads constructor(
+	context: Context, attrs: AttributeSet? = null, defStyleAttr: Int = 0
+) : View(context, attrs, defStyleAttr)
+{
+	override fun onTouchEvent(event: MotionEvent) = true
+}

android/app/src/main/java/com/metallic/chiaki/touchcontrols/DPadView.kt

@@ -18,31 +18,53 @@
 package com.metallic.chiaki.touchcontrols
 
 import android.content.Context
+import android.graphics.BlendMode
 import android.graphics.Canvas
+import android.graphics.PorterDuff
+import android.graphics.drawable.VectorDrawable
 import android.util.AttributeSet
 import android.util.Log
 import android.view.MotionEvent
 import android.view.View
 import androidx.vectordrawable.graphics.drawable.VectorDrawableCompat
 import com.metallic.chiaki.R
+import kotlin.math.abs
 
 class DPadView @JvmOverloads constructor(
 	context: Context, attrs: AttributeSet? = null, defStyleAttr: Int = 0
 ) : View(context, attrs, defStyleAttr)
 {
+	enum class Direction { LEFT, RIGHT, UP, DOWN }
+
 	private val colorPrimary = resources.getColor(R.color.control_primary, null)
 	private val dpadDrawable = VectorDrawableCompat.create(resources, R.drawable.control_dpad, null)
 
-	override fun onDraw(canvas: Canvas) {
+	override fun onDraw(canvas: Canvas)
+	{
 		super.onDraw(canvas)
 		dpadDrawable?.setBounds(0, 0, width, height)
-		dpadDrawable?.setTint(colorPrimary)
+		//dpadDrawable?.setTint(colorPrimary)
+		//dpadDrawable?.setTintBlendMode(BlendMode.SRC_ATOP)
+		//dpadDrawable?.setTintMode(PorterDuff.Mode.SRC_ATOP)
 		dpadDrawable?.draw(canvas)
 	}
 
+	fun directionForPosition(x: Float, y: Float): Direction
+	{
+		val dx = x - width * 0.5f
+		val dy = y - height * 0.5f
+		return when
+		{
+			dx > abs(dy) -> Direction.RIGHT
+			dx <= -abs(dy) -> Direction.LEFT
+			dy > abs(dx) -> Direction.DOWN
+			else /*dy <= -abs(dx)*/ -> Direction.UP
+		}
+	}
+
 	override fun onTouchEvent(event: MotionEvent): Boolean
 	{
-		Log.i("DPadView", "onTouchEvent $event")
+		Log.i("DPadView", "direction: ${directionForPosition(event.x, event.y)}")
 		return true
 	}
 

android/app/src/main/res/drawable/control_dpad.xml

@@ -7,28 +7,28 @@
       android:pathData="M45.244,0L45.244,36.263L62.162,53.181l11.144,0L90.223,36.263L90.223,0Z"
       android:strokeAlpha="1"
       android:strokeWidth="30.92149353"
-      android:fillColor="#000000"
+      android:fillColor="@color/control_primary"
       android:strokeColor="#00000000"
       android:fillAlpha="1"/>
   <path
       android:pathData="M0,45.244L0,90.223L36.263,90.223L53.181,73.305L53.181,62.162L36.263,45.244Z"
       android:strokeAlpha="1"
       android:strokeWidth="30.92149353"
-      android:fillColor="#000000"
+      android:fillColor="@color/control_primary"
       android:strokeColor="#00000000"
       android:fillAlpha="1"/>
   <path
       android:pathData="M99.203,45.244 L82.285,62.162l0,11.144L99.203,90.223L135.467,90.223L135.467,45.244Z"
       android:strokeAlpha="1"
       android:strokeWidth="30.92149353"
-      android:fillColor="#000000"
+      android:fillColor="@color/control_primary"
       android:strokeColor="#00000000"
       android:fillAlpha="1"/>
   <path
       android:pathData="M62.162,82.285 L45.244,99.203L45.244,135.467L90.223,135.467L90.223,99.203L73.305,82.285Z"
       android:strokeAlpha="1"
       android:strokeWidth="30.92149353"
-      android:fillColor="#000000"
+      android:fillColor="@color/control_primary"
       android:strokeColor="#00000000"
       android:fillAlpha="1"/>
 </vector>

android/app/src/main/res/layout/activity_main.xml

@@ -59,4 +59,12 @@
         app:layout_constraintRight_toRightOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
+    <com.metallic.chiaki.touchcontrols.DPadView
+        android:layout_width="100dp"
+        android:layout_height="100dp"
+        android:layout_marginBottom="32dp"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent" />
+
 </androidx.constraintlayout.widget.ConstraintLayout>

android/app/src/main/res/layout/activity_stream.xml

@@ -17,4 +17,24 @@
         android:layout_height="wrap_content"
         app:layout_constraintBottom_toBottomOf="parent"/>
 
+    <com.metallic.chiaki.touchcontrols.ControlsBackgroundView
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+
+    <com.metallic.chiaki.touchcontrols.DPadView
+        android:layout_width="100dp"
+        android:layout_height="100dp"
+        android:layout_marginLeft="32dp"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent" />
+
+    <com.metallic.chiaki.touchcontrols.DPadView
+        android:layout_width="100dp"
+        android:layout_height="100dp"
+        android:layout_marginRight="32dp"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
 </androidx.constraintlayout.widget.ConstraintLayout>