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/*
* 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);
}
}
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