| /* |
| * 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.annotation.NonNull; |
| import android.content.Context; |
| import android.graphics.Canvas; |
| import android.graphics.Color; |
| import android.graphics.PorterDuff; |
| import android.graphics.PorterDuff.Mode; |
| import android.graphics.PorterDuffColorFilter; |
| import android.graphics.drawable.Drawable; |
| import android.util.AttributeSet; |
| import android.view.View; |
| |
| import androidx.core.graphics.ColorUtils; |
| |
| import com.android.internal.annotations.VisibleForTesting; |
| import com.android.internal.colorextraction.ColorExtractor; |
| import com.android.internal.colorextraction.drawable.ScrimDrawable; |
| |
| /** |
| * A view which can draw a scrim |
| */ |
| public class ScrimView extends View { |
| private final ColorExtractor.GradientColors mColors; |
| private float mViewAlpha = 1.0f; |
| private Drawable mDrawable; |
| private PorterDuffColorFilter mColorFilter; |
| private int mTintColor; |
| 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); |
| |
| mDrawable = new ScrimDrawable(); |
| mDrawable.setCallback(this); |
| mColors = new ColorExtractor.GradientColors(); |
| updateColorWithTint(false); |
| } |
| |
| @Override |
| protected void onDraw(Canvas canvas) { |
| if (mDrawable.getAlpha() > 0) { |
| mDrawable.draw(canvas); |
| } |
| } |
| |
| public void setDrawable(Drawable drawable) { |
| mDrawable = drawable; |
| mDrawable.setCallback(this); |
| mDrawable.setBounds(getLeft(), getTop(), getRight(), getBottom()); |
| mDrawable.setAlpha((int) (255 * mViewAlpha)); |
| invalidate(); |
| } |
| |
| @Override |
| public void invalidateDrawable(@NonNull Drawable drawable) { |
| super.invalidateDrawable(drawable); |
| if (drawable == mDrawable) { |
| invalidate(); |
| } |
| } |
| |
| @Override |
| protected void onLayout(boolean changed, int left, int top, int right, int bottom) { |
| super.onLayout(changed, left, top, right, bottom); |
| if (changed) { |
| mDrawable.setBounds(left, top, right, bottom); |
| invalidate(); |
| } |
| } |
| |
| public void setColors(@NonNull ColorExtractor.GradientColors colors) { |
| setColors(colors, false); |
| } |
| |
| public void setColors(@NonNull ColorExtractor.GradientColors colors, boolean animated) { |
| if (colors == null) { |
| throw new IllegalArgumentException("Colors cannot be null"); |
| } |
| if (mColors.equals(colors)) { |
| return; |
| } |
| mColors.set(colors); |
| updateColorWithTint(animated); |
| } |
| |
| @VisibleForTesting |
| Drawable getDrawable() { |
| return mDrawable; |
| } |
| |
| public ColorExtractor.GradientColors getColors() { |
| return mColors; |
| } |
| |
| public void setTint(int color) { |
| setTint(color, false); |
| } |
| |
| public void setTint(int color, boolean animated) { |
| if (mTintColor == color) { |
| return; |
| } |
| mTintColor = color; |
| updateColorWithTint(animated); |
| } |
| |
| private void updateColorWithTint(boolean animated) { |
| if (mDrawable instanceof ScrimDrawable) { |
| // Optimization to blend colors and avoid a color filter |
| ScrimDrawable drawable = (ScrimDrawable) mDrawable; |
| float tintAmount = Color.alpha(mTintColor) / 255f; |
| int mainTinted = ColorUtils.blendARGB(mColors.getMainColor(), mTintColor, |
| tintAmount); |
| drawable.setColor(mainTinted, animated); |
| } else { |
| boolean hasAlpha = Color.alpha(mTintColor) != 0; |
| if (hasAlpha) { |
| PorterDuff.Mode targetMode = mColorFilter == null ? Mode.SRC_OVER : |
| mColorFilter.getMode(); |
| if (mColorFilter == null || mColorFilter.getColor() != mTintColor) { |
| mColorFilter = new PorterDuffColorFilter(mTintColor, targetMode); |
| } |
| } else { |
| mColorFilter = null; |
| } |
| |
| mDrawable.setColorFilter(mColorFilter); |
| mDrawable.invalidateSelf(); |
| } |
| |
| if (mChangeRunnable != null) { |
| mChangeRunnable.run(); |
| } |
| } |
| |
| public int getTint() { |
| return mTintColor; |
| } |
| |
| @Override |
| public boolean hasOverlappingRendering() { |
| return false; |
| } |
| |
| /** |
| * It might look counterintuitive to have another method to set the alpha instead of |
| * only using {@link #setAlpha(float)}. In this case we're in a hardware layer |
| * optimizing blend modes, so it makes sense. |
| * |
| * @param alpha Gradient alpha from 0 to 1. |
| */ |
| public void setViewAlpha(float alpha) { |
| if (alpha != mViewAlpha) { |
| mViewAlpha = alpha; |
| |
| mDrawable.setAlpha((int) (255 * alpha)); |
| if (mChangeRunnable != null) { |
| mChangeRunnable.run(); |
| } |
| } |
| } |
| |
| public float getViewAlpha() { |
| return mViewAlpha; |
| } |
| |
| public void setChangeRunnable(Runnable changeRunnable) { |
| mChangeRunnable = changeRunnable; |
| } |
| |
| @Override |
| protected boolean canReceivePointerEvents() { |
| return false; |
| } |
| } |