| /* |
| * 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.systemui.statusbar.policy; |
| |
| import android.annotation.Nullable; |
| import android.graphics.drawable.Drawable; |
| import android.graphics.drawable.LayerDrawable; |
| import android.view.Gravity; |
| |
| /** |
| * Drawable for {@link KeyButtonView}s which contains an asset for both normal mode and light |
| * navigation bar mode. |
| */ |
| public class KeyButtonDrawable extends LayerDrawable { |
| |
| private final boolean mHasDarkDrawable; |
| |
| public static KeyButtonDrawable create(Drawable lightDrawable, |
| @Nullable Drawable darkDrawable) { |
| if (darkDrawable != null) { |
| return new KeyButtonDrawable( |
| new Drawable[] { lightDrawable.mutate(), darkDrawable.mutate() }); |
| } else { |
| return new KeyButtonDrawable(new Drawable[] { lightDrawable.mutate() }); |
| } |
| } |
| |
| private KeyButtonDrawable(Drawable[] drawables) { |
| super(drawables); |
| for (int i = 0; i < drawables.length; i++) { |
| setLayerGravity(i, Gravity.CENTER); |
| } |
| mutate(); |
| mHasDarkDrawable = drawables.length > 1; |
| setDarkIntensity(0f); |
| } |
| |
| public void setDarkIntensity(float intensity) { |
| if (!mHasDarkDrawable) { |
| return; |
| } |
| getDrawable(0).setAlpha((int) ((1 - intensity) * 255f)); |
| getDrawable(1).setAlpha((int) (intensity * 255f)); |
| invalidateSelf(); |
| } |
| } |