| /* |
| * Copyright (C) 2009 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.launcher3.widget; |
| |
| import android.app.WallpaperColors; |
| import android.appwidget.AppWidgetHostView; |
| import android.content.Context; |
| import android.graphics.Rect; |
| import android.util.SparseIntArray; |
| import android.view.View; |
| |
| import androidx.annotation.Nullable; |
| |
| import com.android.launcher3.R; |
| import com.android.launcher3.util.ResourceBasedOverride; |
| |
| /** Extracts the colors we need from the wallpaper at given locations. */ |
| public class LocalColorExtractor implements ResourceBasedOverride { |
| |
| /** Listener for color changes on a screen location. */ |
| public interface Listener { |
| /** |
| * Method called when the colors on a registered location has changed. |
| * |
| * {@code extractedColors} maps the color resources {@code android.R.colors.system_*} to |
| * their value, in a format that can be passed directly to |
| * {@link AppWidgetHostView#setColorResources(SparseIntArray)}. |
| */ |
| void onColorsChanged(SparseIntArray extractedColors); |
| } |
| |
| /** |
| * Creates a new instance of LocalColorExtractor |
| */ |
| public static LocalColorExtractor newInstance(Context context) { |
| return Overrides.getObject(LocalColorExtractor.class, context.getApplicationContext(), |
| R.string.local_colors_extraction_class); |
| } |
| |
| /** Sets the object that will receive the color changes. */ |
| public void setListener(@Nullable Listener listener) { |
| // no-op |
| } |
| |
| /** |
| * Sets the location used for color extraction |
| * @param pos position to use for color extraction |
| * @param child view whose coordinate space is used for {@code pos} |
| * @param screenId the workspace screenId |
| */ |
| public void setWorkspaceLocation(Rect pos, View child, int screenId) { } |
| |
| /** |
| * Updates the base context to contain the colors override |
| */ |
| public void applyColorsOverride(Context base, WallpaperColors colors) { } |
| |
| /** |
| * Generates color resource overrides from {@link WallpaperColors}. |
| */ |
| @Nullable |
| public SparseIntArray generateColorsOverride(WallpaperColors colors) { |
| return null; |
| } |
| |
| } |