Adding click feedback to StackView (8baf5df0) · Commits · e / os / android_frameworks_base

core/java/android/widget/StackView.java

+52 −3

Original line number	Diff line number	Diff line
		@@ -118,6 +118,8 @@ public class StackView extends AdapterViewAnimator {

		private static HolographicHelper sHolographicHelper;
		private ImageView mHighlight;
		private ImageView mClickFeedback;
		private boolean mClickFeedbackIsValid = false;
		private StackSlider mStackSlider;
		private boolean mFirstLayoutHappened = false;
		private int mStackMode;
		@@ -145,6 +147,12 @@ public class StackView extends AdapterViewAnimator {
		mHighlight = new ImageView(getContext());
		mHighlight.setLayoutParams(new LayoutParams(mHighlight));
		addViewInLayout(mHighlight, -1, new LayoutParams(mHighlight));

		mClickFeedback = new ImageView(getContext());
		mClickFeedback.setLayoutParams(new LayoutParams(mClickFeedback));
		addViewInLayout(mClickFeedback, -1, new LayoutParams(mClickFeedback));
		mClickFeedback.setVisibility(INVISIBLE);

		mStackSlider = new StackSlider();

		if (sHolographicHelper == null) {
		@@ -310,6 +318,34 @@ public class StackView extends AdapterViewAnimator {
		}
		}
		mTransitionIsSetup = false;
		mClickFeedbackIsValid = false;
		}

		void updateClickFeedback() {
		if (!mClickFeedbackIsValid) {
		View v = getViewAtRelativeIndex(0);
		if (v != null) {
		mClickFeedback.setImageBitmap(sHolographicHelper.createOutline(v,
		HolographicHelper.CLICK_FEEDBACK));
		mClickFeedback.setTranslationX(v.getTranslationX());
		mClickFeedback.setTranslationY(v.getTranslationY());
		}
		mClickFeedbackIsValid = true;
		}
		}

		@Override
		void showTapFeedback(View v) {
		updateClickFeedback();
		mClickFeedback.setVisibility(VISIBLE);
		mClickFeedback.bringToFront();
		invalidate();
		}

		@Override
		void hideTapFeedback(View v) {
		mClickFeedback.setVisibility(INVISIBLE);
		invalidate();
		}

		private void updateChildTransforms() {
		@@ -1010,23 +1046,36 @@ public class StackView extends AdapterViewAnimator {
		private final Paint mHolographicPaint = new Paint();
		private final Paint mErasePaint = new Paint();
		private final Paint mBlurPaint = new Paint();
		private static final int RES_OUT = 0;
		private static final int CLICK_FEEDBACK = 1;
		private float mDensity;

		HolographicHelper(Context context) {
		initializePaints(context);
		}

		void initializePaints(Context context) {
		final float density = context.getResources().getDisplayMetrics().density;
		mDensity = context.getResources().getDisplayMetrics().density;

		mHolographicPaint.setColor(0xff6699ff);
		mHolographicPaint.setFilterBitmap(true);
		mHolographicPaint.setMaskFilter(TableMaskFilter.CreateClipTable(0, 30));
		mErasePaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT));
		mErasePaint.setFilterBitmap(true);
		mBlurPaint.setMaskFilter(new BlurMaskFilter(2*density, BlurMaskFilter.Blur.NORMAL));
		}

		Bitmap createOutline(View v) {
		return createOutline(v, RES_OUT);
		}

		Bitmap createOutline(View v, int type) {
		if (type == RES_OUT) {
		mHolographicPaint.setColor(0xff6699ff);
		mBlurPaint.setMaskFilter(new BlurMaskFilter(2*mDensity, BlurMaskFilter.Blur.NORMAL));
		} else if (type == CLICK_FEEDBACK) {
		mHolographicPaint.setColor(0x886699ff);
		mBlurPaint.setMaskFilter(new BlurMaskFilter(4*mDensity, BlurMaskFilter.Blur.NORMAL));
		}

		if (v.getMeasuredWidth() == 0 \|\| v.getMeasuredHeight() == 0) {
		return null;
		}