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/*
* Copyright (C) 2014 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.systemui.statusbar;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.ValueAnimator;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.PorterDuff;
import android.util.AttributeSet;
import android.view.View;
import android.view.animation.Interpolator;
/**
* A view which can draw a scrim
*/
public class ScrimView extends View
{
private int mScrimColor;
private boolean mIsEmpty = true;
private boolean mDrawAsSrc;
private float mViewAlpha = 1.0f;
private ValueAnimator mAlphaAnimator;
private ValueAnimator.AnimatorUpdateListener mAlphaUpdateListener
= new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
mViewAlpha = (float) animation.getAnimatedValue();
invalidate();
}
};
private AnimatorListenerAdapter mClearAnimatorListener = new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
mAlphaAnimator = null;
}
};
public ScrimView(Context context) {
this(context, null);
}
public ScrimView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public ScrimView(Context context, AttributeSet attrs, int defStyleAttr) {
this(context, attrs, defStyleAttr, 0);
}
public ScrimView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
}
@Override
protected void onDraw(Canvas canvas) {
if (mDrawAsSrc || (!mIsEmpty && mViewAlpha > 0f)) {
PorterDuff.Mode mode = mDrawAsSrc ? PorterDuff.Mode.SRC : PorterDuff.Mode.SRC_OVER;
int color = mScrimColor;
color = Color.argb((int) (Color.alpha(color) * mViewAlpha), Color.red(color),
Color.green(color), Color.blue(color));
canvas.drawColor(color, mode);
}
}
public void setDrawAsSrc(boolean asSrc) {
mDrawAsSrc = asSrc;
invalidate();
}
public void setScrimColor(int color) {
if (color != mScrimColor) {
mIsEmpty = Color.alpha(color) == 0;
mScrimColor = color;
invalidate();
}
}
public int getScrimColor() {
return mScrimColor;
}
@Override
public boolean hasOverlappingRendering() {
return false;
}
public void setViewAlpha(float alpha) {
if (mAlphaAnimator != null) {
mAlphaAnimator.cancel();
}
mViewAlpha = alpha;
invalidate();
}
public void animateViewAlpha(float alpha, long durationOut, Interpolator interpolator) {
if (mAlphaAnimator != null) {
mAlphaAnimator.cancel();
}
mAlphaAnimator = ValueAnimator.ofFloat(mViewAlpha, alpha);
mAlphaAnimator.addUpdateListener(mAlphaUpdateListener);
mAlphaAnimator.addListener(mClearAnimatorListener);
mAlphaAnimator.setInterpolator(interpolator);
mAlphaAnimator.setDuration(durationOut);
mAlphaAnimator.start();
}
}
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