1 files changed, 68 insertions, 0 deletions
diff --git a/src/com/android/launcher3/anim/PillRevealOutlineProvider.java b/src/com/android/launcher3/anim/PillRevealOutlineProvider.java
new file mode 100644
index 000000000..450f9db9a
--- /dev/null
+++ b/src/com/android/launcher3/anim/PillRevealOutlineProvider.java
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3.anim;
+
+import android.graphics.Rect;
+import android.view.ViewOutlineProvider;
+
+/**
+ * A {@link ViewOutlineProvider} that animates a reveal in a "pill" shape.
+ * A pill is simply a round rect, but we assume the width is greater than
+ * the height and that the radius is equal to half the height.
+ */
+public class PillRevealOutlineProvider extends RevealOutlineAnimation {
+
+    private int mCenterX;
+    private int mCenterY;
+    private float mFinalRadius;
+    protected Rect mPillRect;
+
+    /**
+     * @param x reveal center x
+     * @param y reveal center y
+     * @param pillRect round rect that represents the final pill shape
+     */
+    public PillRevealOutlineProvider(int x, int y, Rect pillRect) {
+        this(x, y, pillRect, pillRect.height() / 2f);
+    }
+
+    public PillRevealOutlineProvider(int x, int y, Rect pillRect, float radius) {
+        mCenterX = x;
+        mCenterY = y;
+        mPillRect = pillRect;
+        mOutlineRadius = mFinalRadius = radius;
+    }
+
+    @Override
+    public boolean shouldRemoveElevationDuringAnimation() {
+        return false;
+    }
+
+    @Override
+    public void setProgress(float progress) {
+        // Assumes width is greater than height.
+        int centerToEdge = Math.max(mCenterX, mPillRect.width() - mCenterX);
+        int currentSize = (int) (progress * centerToEdge);
+
+        // Bound the outline to the final pill shape defined by mPillRect.
+        mOutline.left = Math.max(mPillRect.left, mCenterX - currentSize);
+        mOutline.top = Math.max(mPillRect.top, mCenterY - currentSize);
+        mOutline.right = Math.min(mPillRect.right, mCenterX + currentSize);
+        mOutline.bottom = Math.min(mPillRect.bottom, mCenterY + currentSize);
+        mOutlineRadius = Math.min(mFinalRadius, mOutline.height() / 2);
+    }
+}