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