package com.rehome.sgbaxj.weight;

import android.content.Context;
import android.graphics.drawable.Drawable;
import androidx.core.content.ContextCompat;
import androidx.core.graphics.drawable.DrawableCompat;
import androidx.appcompat.widget.AppCompatEditText;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;

import com.rehome.sgbaxj.R;


/**
 * Created by Rehome-rjb1 on 2017/5/9.
 * 一个可以清空文本框的EditText
 */

public class ClearEditText extends AppCompatEditText implements View.OnTouchListener, View.OnFocusChangeListener, TextWatcher {

    private Drawable mClearTextIcon;
    private OnFocusChangeListener mOnFocusChangeListener;
    private OnTouchListener mOnTouchListener;

    public ClearEditText(final Context context) {
        super(context);
        init(context);
    }

    public ClearEditText(final Context context, final AttributeSet attrs) {
        super(context, attrs);
        init(context);
    }

    public ClearEditText(final Context context, final AttributeSet attrs, final int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init(context);
    }

    private void init(final Context context) {

        final Drawable drawable = ContextCompat.getDrawable(context, R.mipmap.del);
        final Drawable wrappedDrawable = DrawableCompat.wrap(drawable); //Wrap the drawable so that it can be tinted pre Lollipop
        DrawableCompat.setTint(wrappedDrawable, getCurrentHintTextColor());
        mClearTextIcon = wrappedDrawable;

//        mClearTextIcon= context.getResources().getDrawable(R.drawable.icon_delete_32);
        //设置图片在右边
        mClearTextIcon.setBounds(0, 0, mClearTextIcon.getIntrinsicHeight(), mClearTextIcon.getIntrinsicHeight());
        //默认设置为隐藏状态1
        setClearIconVisible(false);
        super.setOnTouchListener(this);
        super.setOnFocusChangeListener(this);
        addTextChangedListener(this);
    }

    @Override
    public void setOnFocusChangeListener(OnFocusChangeListener l) {
        mOnFocusChangeListener = l;
    }

    @Override
    public void setOnTouchListener(OnTouchListener l) {
        mOnTouchListener = l;
    }

    @Override
    public void onFocusChange(View v, boolean hasFocus) {
        //如果获取焦点。文本大于0就显示删除按钮，
        if (hasFocus) {
            setClearIconVisible(getText().length() > 0);
        } else {
            setClearIconVisible(false);
        }
        if (mOnFocusChangeListener != null) {
            mOnFocusChangeListener.onFocusChange(v, hasFocus);
        }
    }

    @Override
    public boolean onTouch(View view, MotionEvent motionEvent) {
        final int x = (int) motionEvent.getX();
        //点击删除按钮，就清空字符串
        if (mClearTextIcon.isVisible() && x > getWidth() - getPaddingRight() - mClearTextIcon.getIntrinsicWidth()) {
            if (motionEvent.getAction() == MotionEvent.ACTION_UP) {
                setError(null);
                setText("");
            }
            return true;
        }
        return mOnTouchListener != null && mOnTouchListener.onTouch(view, motionEvent);
    }

    @Override
    public final void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
        //有获取到焦点且文本发生变化时候，显示删除按钮
        if (isFocused()) {
            setClearIconVisible(text.length() > 0);
        }
    }

    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {

    }

    @Override
    public void afterTextChanged(Editable s) {

    }

    //设置删除图标是否隐藏
    private void setClearIconVisible(final boolean visible) {
        mClearTextIcon.setVisible(visible, false);
        final Drawable[] compoundDrawables = getCompoundDrawables();
        setCompoundDrawables(
                compoundDrawables[0],
                compoundDrawables[1],
                visible ? mClearTextIcon : null,
                compoundDrawables[3]);
    }

}
