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Unified Diff: chrome/android/java/src/org/chromium/chrome/browser/appmenu/RowHighlightDrawable.java

Issue 2779543005: Add support for highlighting menu items (Closed)
Patch Set: Cleaned up some comments and code Created 3 years, 9 months ago
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Index: chrome/android/java/src/org/chromium/chrome/browser/appmenu/RowHighlightDrawable.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/appmenu/RowHighlightDrawable.java b/chrome/android/java/src/org/chromium/chrome/browser/appmenu/RowHighlightDrawable.java
new file mode 100644
index 0000000000000000000000000000000000000000..14d36c0471d9942c9eca3e3b6b354358d6e606df
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/appmenu/RowHighlightDrawable.java
@@ -0,0 +1,64 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.appmenu;
+
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
+import android.animation.AnimatorSet;
+import android.animation.ObjectAnimator;
+import android.graphics.drawable.ColorDrawable;
+import android.support.annotation.ColorInt;
+import android.support.v4.view.animation.FastOutSlowInInterpolator;
+
+/** A {@link Drawable} that pulses a color. */
+public class RowHighlightDrawable extends ColorDrawable {
+ /** Creates a new black pulsing {@link RowHighlightDrawable}. */
+ public RowHighlightDrawable() {
+ startAnimation();
+ }
+
+ /**
+ * Creates a new {@link RowHighlightDrawable} with the specified color.
+ * @param color The color to draw.
+ */
+ public RowHighlightDrawable(@ColorInt int color) {
+ super(color);
+ startAnimation();
+ }
+
+ private void startAnimation() {
+ setAlpha(75);
+ ObjectAnimator fadeInAnim = ObjectAnimator.ofInt(this, "alpha", 75, 12);
+ fadeInAnim.setStartDelay(500);
+ fadeInAnim.setDuration(500);
+ fadeInAnim.setInterpolator(new FastOutSlowInInterpolator());
+
+ ObjectAnimator fadeOutAnim = ObjectAnimator.ofInt(this, "alpha", 12, 75);
+ fadeOutAnim.setDuration(250);
+ fadeOutAnim.setInterpolator(new FastOutSlowInInterpolator());
+
+ AnimatorSet set = new AnimatorSet();
+ set.playSequentially(fadeInAnim, fadeOutAnim);
+ set.addListener(new AnimatorListenerAdapter() {
+ private boolean mCanceled;
+
+ @Override
+ public void onAnimationStart(Animator animation) {
+ mCanceled = false;
+ }
+
+ @Override
+ public void onAnimationCancel(Animator animation) {
+ mCanceled = true;
+ }
+
+ @Override
+ public void onAnimationEnd(Animator animation) {
+ if (!mCanceled) animation.start();
+ }
+ });
+ set.start();
+ }
+}

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