| /* |
| * 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.Paint; |
| import android.graphics.PorterDuff; |
| import android.graphics.PorterDuffXfermode; |
| import android.graphics.Rect; |
| 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 final Paint mPaint = new Paint(); |
| private int mScrimColor; |
| private boolean mIsEmpty = true; |
| private boolean mDrawAsSrc; |
| private float mViewAlpha = 1.0f; |
| private ValueAnimator mAlphaAnimator; |
| private Rect mExcludedRect = new Rect(); |
| private boolean mHasExcludedArea; |
| 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; |
| } |
| }; |
| private Runnable mChangeRunnable; |
| |
| 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 = getScrimColorWithAlpha(); |
| if (!mHasExcludedArea) { |
| canvas.drawColor(color, mode); |
| } else { |
| mPaint.setColor(color); |
| if (mExcludedRect.top > 0) { |
| canvas.drawRect(0, 0, getWidth(), mExcludedRect.top, mPaint); |
| } |
| if (mExcludedRect.left > 0) { |
| canvas.drawRect(0, mExcludedRect.top, mExcludedRect.left, mExcludedRect.bottom, |
| mPaint); |
| } |
| if (mExcludedRect.right < getWidth()) { |
| canvas.drawRect(mExcludedRect.right, |
| mExcludedRect.top, |
| getWidth(), |
| mExcludedRect.bottom, |
| mPaint); |
| } |
| if (mExcludedRect.bottom < getHeight()) { |
| canvas.drawRect(0, mExcludedRect.bottom, getWidth(), getHeight(), mPaint); |
| } |
| } |
| } |
| } |
| |
| public int getScrimColorWithAlpha() { |
| int color = mScrimColor; |
| color = Color.argb((int) (Color.alpha(color) * mViewAlpha), Color.red(color), |
| Color.green(color), Color.blue(color)); |
| return color; |
| } |
| |
| public void setDrawAsSrc(boolean asSrc) { |
| mDrawAsSrc = asSrc; |
| mPaint.setXfermode(new PorterDuffXfermode(mDrawAsSrc ? PorterDuff.Mode.SRC |
| : PorterDuff.Mode.SRC_OVER)); |
| invalidate(); |
| } |
| |
| public void setScrimColor(int color) { |
| if (color != mScrimColor) { |
| mIsEmpty = Color.alpha(color) == 0; |
| mScrimColor = color; |
| invalidate(); |
| if (mChangeRunnable != null) { |
| mChangeRunnable.run(); |
| } |
| } |
| } |
| |
| public int getScrimColor() { |
| return mScrimColor; |
| } |
| |
| @Override |
| public boolean hasOverlappingRendering() { |
| return false; |
| } |
| |
| public void setViewAlpha(float alpha) { |
| if (mAlphaAnimator != null) { |
| mAlphaAnimator.cancel(); |
| } |
| if (alpha != mViewAlpha) { |
| mViewAlpha = alpha; |
| invalidate(); |
| if (mChangeRunnable != null) { |
| mChangeRunnable.run(); |
| } |
| } |
| } |
| |
| 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(); |
| } |
| |
| public void setExcludedArea(Rect area) { |
| if (area == null) { |
| mHasExcludedArea = false; |
| invalidate(); |
| return; |
| } |
| |
| int left = Math.max(area.left, 0); |
| int top = Math.max(area.top, 0); |
| int right = Math.min(area.right, getWidth()); |
| int bottom = Math.min(area.bottom, getHeight()); |
| mExcludedRect.set(left, top, right, bottom); |
| mHasExcludedArea = left < right && top < bottom; |
| invalidate(); |
| } |
| |
| public void setChangeRunnable(Runnable changeRunnable) { |
| mChangeRunnable = changeRunnable; |
| } |
| } |