package com.github.lazylibrary.util; /**
 * Copyright 2014 Zhenguo Jin (jinzhenguo1990@gmail.com)
 *
 * 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.
 */

import android.animation.ValueAnimator;
import android.app.Activity;
import android.content.Context;
import android.content.res.Configuration;
import android.view.Surface;
import android.view.Window;
import android.view.WindowManager;

/**
 * 窗口工具箱
 *
 * @author zhenguo
 */
public final class WindowUtils {

    /**
     * Don't let anyone instantiate this class.
     */
    private WindowUtils() {
        throw new Error("Do not need instantiate!");
    }

    /**
     * 获取当前窗口的旋转角度
     *
     * @param activity activity
     * @return  int
     */
    public static int getDisplayRotation(Activity activity) {
        switch (activity.getWindowManager().getDefaultDisplay().getRotation()) {
            case Surface.ROTATION_0:
                return 0;
            case Surface.ROTATION_90:
                return 90;
            case Surface.ROTATION_180:
                return 180;
            case Surface.ROTATION_270:
                return 270;
            default:
                return 0;
        }
    }

    /**
     * 当前是否是横屏
     *
     * @param context  context
     * @return  boolean
     */
    public static final boolean isLandscape(Context context) {
        return context.getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE;
    }

    /**
     * 当前是否是竖屏
     *
     * @param context  context
     * @return   boolean
     */
    public static final boolean isPortrait(Context context) {
        return context.getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT;
    }
    /**
     *  调整窗口的透明度  1.0f,0.5f 变暗
     * @param from  from>=0&&from<=1.0f
     * @param to  to>=0&&to<=1.0f
     * @param context  当前的activity
     */
    public static void dimBackground(final float from, final float to, Activity context) {
        final Window window = context.getWindow();
        ValueAnimator valueAnimator = ValueAnimator.ofFloat(from, to);
        valueAnimator.setDuration(500);
        valueAnimator.addUpdateListener(
                new ValueAnimator.AnimatorUpdateListener() {
                    @Override
                    public void onAnimationUpdate(ValueAnimator animation) {
                        WindowManager.LayoutParams params
                                = window.getAttributes();
                        params.alpha = (Float) animation.getAnimatedValue();
                        window.setAttributes(params);
                    }
                });
        valueAnimator.start();
    }
}