Increased the hold duration for virtual keys that also support swiping. It was extremely short and uncontrollable on fast devices

app/src/main/java/io/github/sspanak/tt9/ui/main/keys/SoftKeyBackspace.java

@@ -24,18 +24,54 @@ public class SoftKeyBackspace extends SwipeableKey {
 		super(context, attrs, defStyleAttr);
 	}
 
+
+	private boolean isFastDeleteOn() {
+		return tt9 != null && tt9.getSettings().getBackspaceAcceleration();
+	}
+
+
+	/**
+	 * When fast-delete is on, decrease the hold duration threshold for smoother operation.
+	 */
+	@Override
+	protected float getHoldDurationThreshold() {
+		return isFastDeleteOn() ? SettingsStore.SOFT_KEY_REPEAT_DELAY * 3 : super.getHoldDurationThreshold();
+	}
+
+
+	/**
+	 * When fast-delete is on, prevent swapping that does nothing. It may feel frustrating if the user
+	 * moves their finger slightly and the key does not delete anything.
+	 */
+	@Override
+	protected float getSwipeXThreshold(Context context) {
+		return isFastDeleteOn() ? super.getSwipeXThreshold(context) : Integer.MAX_VALUE;
+	}
+
+
+	/**
+	 * Disable vertical swiping for backspace key.
+	 */
+	@Override
+	protected float getSwipeYThreshold(Context context) {
+		return Integer.MAX_VALUE;
+	}
+
+
 	@Override
 	final protected boolean handlePress() {
 		super.handlePress();
 		return deleteText();
 	}
 
+
 	@Override
 	final protected void handleHold() {
 		repeat++;
 		deleteText();
 	}
 
+
 	@Override
 	final protected boolean handleRelease() {
 		vibrate(repeat > 0 ? Vibration.getReleaseVibration() : Vibration.getNoVibration());
@@ -43,6 +79,7 @@ public class SoftKeyBackspace extends SwipeableKey {
 		return true;
 	}
 
+
 	@Override
 	protected void handleEndSwipeX(float position, float delta) {
 		if (validateTT9Handler()) {
@@ -50,6 +87,7 @@ public class SoftKeyBackspace extends SwipeableKey {
 		}
 	}
 
+
 	private boolean deleteText() {
 		if (validateTT9Handler() && !tt9.onBackspace(repeat)) {
 			// Limited or special numeric field (e.g. formatted money or dates) cannot always return
@@ -62,16 +100,19 @@ public class SoftKeyBackspace extends SwipeableKey {
 		return false;
 	}
 
+
 	@Override
 	protected int getNoEmojiTitle() {
 		return R.string.virtual_key_del;
 	}
 
+
 	@Override
 	protected String getTitle() {
 		return LanguageKind.isRTL(tt9 != null ? tt9.getLanguage() : null) ? "⌦" : "⌫";
 	}
 
+
 	@Override
 	public void render() {
 		super.render();

app/src/main/java/io/github/sspanak/tt9/ui/main/keys/SwipeableKey.java

@@ -25,36 +25,30 @@ abstract public class SwipeableKey extends SoftKey {
 
 	public SwipeableKey(Context context) {
 		super(context);
-		init(context);
+		resetTimeThresholds(context);
 	}
 
 
 	public SwipeableKey(Context context, AttributeSet attrs) {
 		super(context, attrs);
-		init(context);
+		resetTimeThresholds(context);
 	}
 
 
 	public SwipeableKey(Context context, AttributeSet attrs, int defStyleAttr) {
 		super(context, attrs, defStyleAttr);
-		init(context);
+		resetTimeThresholds(context);
 	}
 
 
-	private void init(Context context) {
+	protected final void resetTimeThresholds(Context context) {
-		if (HOLD_DURATION_THRESHOLD == 0) {
 		HOLD_DURATION_THRESHOLD = getHoldDurationThreshold();
-		}
-		if (SWIPE_X_THRESHOLD == 0) {
 		SWIPE_X_THRESHOLD = getSwipeXThreshold(context);
-		}
-		if (SWIPE_Y_THRESHOLD == 0) {
 		SWIPE_Y_THRESHOLD = getSwipeYThreshold(context);
 	}
-	}
 
 
-	protected float getHoldDurationThreshold() { return SettingsStore.SOFT_KEY_REPEAT_DELAY * 3; }
+	protected float getHoldDurationThreshold() { return SettingsStore.SOFT_KEY_REPEAT_DELAY * 9; }
 	protected float getSwipeXThreshold(Context context) { return context.getResources().getDimensionPixelSize(R.dimen.numpad_key_height) / 10.0f; }
 	protected float getSwipeYThreshold(Context context) { return context.getResources().getDimensionPixelSize(R.dimen.numpad_key_height) / 10.0f; }
 
@@ -80,11 +74,11 @@ abstract public class SwipeableKey extends SoftKey {
 	@Override
 	public boolean onLongClick(View view) {
 		if (System.currentTimeMillis() - startTime < HOLD_DURATION_THRESHOLD) {
-			return true;
+			return false;
 		}
 
 		isHolding = !isSwipingY && !isSwipingX;
-		return isSwipingY || isSwipingX || super.onLongClick(view);
+		return !isHolding || super.onLongClick(view);
 	}
 
 
@@ -143,4 +137,12 @@ abstract public class SwipeableKey extends SoftKey {
 	protected void handleEndSwipeX(float position, float delta) {}
 	protected void handleEndSwipeY(float position, float delta) {}
 	protected boolean notSwiped() { return notSwiped; }
+
+
+	@Override
+	public void render() {
+		// readjust the action detection delays for keys that set them dynamically
+		resetTimeThresholds(getContext());
+		super.render();
+	}
 }