Increasing the tap radius for the handle in MultiWaveView to improve accessibility (66b191da) · Commits · e / os / android_frameworks_base

core/java/com/android/internal/widget/multiwaveview/MultiWaveView.java

+13 −2

Original line number	Diff line number	Diff line
		@@ -79,6 +79,7 @@ public class MultiWaveView extends View {
		private static final int HIDE_ANIMATION_DURATION = RETURN_TO_HOME_DELAY;
		private static final int SHOW_ANIMATION_DURATION = 0;
		private static final int SHOW_ANIMATION_DELAY = 0;
		private static final float TAP_RADIUS_SCALE_ACCESSIBILITY_ENABLED = 1.3f;
		private TimeInterpolator mChevronAnimationInterpolator = Ease.Quad.easeOut;

		private ArrayList<TargetDrawable> mTargetDrawables = new ArrayList<TargetDrawable>();
		@@ -663,7 +664,7 @@ public class MultiWaveView extends View {
		final float y = event.getY();
		final float dx = x - mWaveCenterX;
		final float dy = y - mWaveCenterY;
		if (dist2(dx,dy) <= square(mTapRadius)) {
		if (dist2(dx,dy) <= getScaledTapRadiusSquared()) {
		if (DEBUG) Log.v(TAG, "** Handle HIT");
		switchToState(STATE_FIRST_TOUCH, x, y);
		moveHandleTo(x, y, false);
		@@ -684,7 +685,7 @@ public class MultiWaveView extends View {
		case MotionEvent.ACTION_HOVER_MOVE:
		final float dx = event.getX() - mWaveCenterX;
		final float dy = event.getY() - mWaveCenterY;
		if (dist2(dx,dy) <= square(mTapRadius)) {
		if (dist2(dx,dy) <= getScaledTapRadiusSquared()) {
		if (!mWaveHovered) {
		mWaveHovered = true;
		final long timeSinceLastHoverExitMillis =
		@@ -894,6 +895,16 @@ public class MultiWaveView extends View {
		return dxdx + dydy;
		}

		private float getScaledTapRadiusSquared() {
		final float scaledTapRadius;
		if (AccessibilityManager.getInstance(mContext).isEnabled()) {
		scaledTapRadius = TAP_RADIUS_SCALE_ACCESSIBILITY_ENABLED * mTapRadius;
		} else {
		scaledTapRadius = mTapRadius;
		}
		return square(scaledTapRadius);
		}

		private void announceTargets() {
		StringBuilder utterance = new StringBuilder();
		final int targetCount = mTargetDrawables.size();