1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License 15 */ 16 17 package com.android.systemui.statusbar.policy; 18 19 import android.annotation.ColorInt; 20 import android.graphics.Color; 21 import android.graphics.drawable.Drawable; 22 23 import com.android.internal.graphics.ColorUtils; 24 import com.android.systemui.statusbar.phone.ShadowKeyDrawable; 25 26 /** 27 * Drawable for {@link KeyButtonView}s which contains a single asset and colors for light and dark 28 * navigation bar mode. 29 */ 30 public class TintedKeyButtonDrawable extends KeyButtonDrawable { 31 32 private final int mLightColor; 33 private final int mDarkColor; 34 35 public static final float DARK_INTENSITY_NOT_SET = -1f; 36 private float mDarkIntensity = DARK_INTENSITY_NOT_SET; 37 create(Drawable drawable, @ColorInt int lightColor, @ColorInt int darkColor)38 public static TintedKeyButtonDrawable create(Drawable drawable, @ColorInt int lightColor, 39 @ColorInt int darkColor) { 40 return new TintedKeyButtonDrawable(new Drawable[] { drawable }, 41 lightColor, darkColor); 42 } 43 TintedKeyButtonDrawable(Drawable[] drawables, int lightColor, int darkColor)44 private TintedKeyButtonDrawable(Drawable[] drawables, int lightColor, int darkColor){ 45 super(drawables); 46 mLightColor = lightColor; 47 mDarkColor = darkColor; 48 setDarkIntensity(0f); // Set initial coloration 49 } 50 51 @Override setDarkIntensity(float intensity)52 public void setDarkIntensity(float intensity) { 53 // Duplicate intensity scaling from KeyButtonDrawable 54 mDarkIntensity = intensity; 55 56 // Dark and light colors may have an alpha component 57 final int intermediateColor = ColorUtils.compositeColors( 58 blendAlpha(mDarkColor, intensity), 59 blendAlpha(mLightColor, (1f - intensity))); 60 61 getDrawable(0).setTint(intermediateColor); 62 invalidateSelf(); 63 } 64 blendAlpha(int color, float alpha)65 private int blendAlpha(int color, float alpha) { 66 final float newAlpha = alpha < 0f ? 0f : (alpha > 1f ? 1f : alpha); 67 final float colorAlpha = Color.alpha(color) / 255f; 68 final int alphaInt = (int) (255 * newAlpha * colorAlpha); // Blend by multiplying 69 // Ensure alpha is clamped [0-255] or ColorUtils will crash 70 return ColorUtils.setAlphaComponent(color, alphaInt); 71 } 72 isDarkIntensitySet()73 public boolean isDarkIntensitySet() { 74 return mDarkIntensity != DARK_INTENSITY_NOT_SET; 75 } 76 getDarkIntensity()77 public float getDarkIntensity() { 78 return mDarkIntensity; 79 } 80 } 81