From 17543fd7c8bffaa19c75d7144f95e8a71891a47c Mon Sep 17 00:00:00 2001
From: Jordan Irwin <antumdeluge@gmail.com>
Date: Wed, 16 Feb 2022 09:02:51 -0800
Subject: [PATCH] WebView: add basic direction handling with d-pad

---
 android/TODO.txt                              |  2 +
 .../org/arianne/stendhal/client/DPad.java     | 68 +++++++++++++++++--
 2 files changed, 65 insertions(+), 5 deletions(-)

diff --git a/android/TODO.txt b/android/TODO.txt
index 3a132021f40..2ce1a2a5ec6 100644
--- a/android/TODO.txt
+++ b/android/TODO.txt
@@ -8,6 +8,8 @@ TODO:
   - take screenshot
   - set theme
 - add option to have joystick style d-pad instead of arrows
+- spread out d-pad arrows & make bigger
+- add setting to customize d-pad position
 
 BUILD TODO:
 - script to download Android SDK
diff --git a/android/app/src/main/java/org/arianne/stendhal/client/DPad.java b/android/app/src/main/java/org/arianne/stendhal/client/DPad.java
index 06686e2eeca..f97896e0491 100644
--- a/android/app/src/main/java/org/arianne/stendhal/client/DPad.java
+++ b/android/app/src/main/java/org/arianne/stendhal/client/DPad.java
@@ -14,6 +14,8 @@
 import android.content.Context;
 import android.graphics.Point;
 import android.view.Display;
+import android.view.KeyEvent;
+import android.view.MotionEvent;
 import android.view.View;
 import android.widget.ImageView;
 import androidx.constraintlayout.widget.ConstraintLayout;
@@ -38,6 +40,13 @@ public class DPad {
 	private final List<ArrowView> arrows;
 	private final ConstraintLayout layout;
 
+	private enum Dir {
+		LEFT,
+		RIGHT,
+		UP,
+		DOWN;
+	}
+
 
 	public static DPad get() {
 		if (instance == null) {
@@ -54,10 +63,10 @@ private DPad() {
 		layout = new ConstraintLayout(ctx);
 		layout.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
 
-		final ArrowView arrow_l = new ArrowView(ctx, R.drawable.dpad_arrow_left);
-		final ArrowView arrow_r = new ArrowView(ctx, R.drawable.dpad_arrow_right);
-		final ArrowView arrow_u = new ArrowView(ctx, R.drawable.dpad_arrow_up);
-		final ArrowView arrow_d = new ArrowView(ctx, R.drawable.dpad_arrow_down);
+		final ArrowView arrow_l = new ArrowView(ctx, R.drawable.dpad_arrow_left, Dir.LEFT);
+		final ArrowView arrow_r = new ArrowView(ctx, R.drawable.dpad_arrow_right, Dir.RIGHT);
+		final ArrowView arrow_u = new ArrowView(ctx, R.drawable.dpad_arrow_up, Dir.UP);
+		final ArrowView arrow_d = new ArrowView(ctx, R.drawable.dpad_arrow_down, Dir.DOWN);
 
 		arrows.add(arrow_l);
 		arrows.add(arrow_r);
@@ -116,11 +125,60 @@ public void onRefreshView() {
 
 
 	private static class ArrowView extends ImageView {
-		public ArrowView(final Context ctx, final int id) {
+
+		private final Dir dir;
+
+		private boolean keyDown = false;
+
+
+		public ArrowView(final Context ctx, final int id, final Dir dir) {
 			super(ctx);
 
+			this.dir = dir;
+
 			setBackgroundColor(android.graphics.Color.TRANSPARENT);
 			setImageResource(id);
+
+			setOnTouchListener(new View.OnTouchListener() {
+				@Override
+				public boolean onTouch(final View view, final MotionEvent event) {
+					final int action = event.getAction();
+
+					Integer newAction = null;
+					Integer keyCode = null;
+
+					if (action == MotionEvent.ACTION_DOWN && !keyDown) {
+						newAction = KeyEvent.ACTION_DOWN;
+						keyDown = true;
+					} else if (action == MotionEvent.ACTION_UP && keyDown) {
+						newAction = KeyEvent.ACTION_UP;
+						keyDown = false;
+					}
+
+					if (newAction != null) {
+
+						switch (dir) {
+							case LEFT:
+								keyCode = KeyEvent.KEYCODE_DPAD_LEFT;
+								break;
+							case RIGHT:
+								keyCode = KeyEvent.KEYCODE_DPAD_RIGHT;
+								break;
+							case UP:
+								keyCode = KeyEvent.KEYCODE_DPAD_UP;
+								break;
+							case DOWN:
+								keyCode = KeyEvent.KEYCODE_DPAD_DOWN;
+								break;
+						}
+
+						MainActivity.get().dispatchKeyEvent(new KeyEvent(newAction, keyCode));
+						return true; // consume event
+					}
+
+					return false;
+				}
+			});
 		}
 	}
 }