package com.gh.common.view;

import android.annotation.SuppressLint;
import android.graphics.Canvas;
import android.graphics.ColorFilter;
import android.graphics.drawable.Drawable;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;

/**
 * 一个空的类 主要是用来回调 onLevelChange(加载进度)的内容
 */

public class EmptyDrawable extends Drawable {
    private OnLoadingListener mLoadingListener;

    public EmptyDrawable(OnLoadingListener listener) {
        this.mLoadingListener = listener;
    }

    @Override
    public void draw(@NonNull Canvas canvas) {

    }

    @Override
    public void setAlpha(int alpha) {

    }

    @Override
    public void setColorFilter(@Nullable ColorFilter colorFilter) {

    }

    @SuppressLint("WrongConstant")
    @Override
    public int getOpacity() {
        return 0;
    }

    //Default Max:10000
    @Override
    protected boolean onLevelChange(int level) {
        if (mLoadingListener != null) mLoadingListener.onProgress(level);
        return false;
    }

    public interface OnLoadingListener {
        void onProgress(int progress);
    }
}