package com.moral.andbrickslib.views;
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import android.content.Context;
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import android.graphics.Rect;
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import android.graphics.drawable.Drawable;
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import android.text.Editable;
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import android.text.TextWatcher;
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import android.util.AttributeSet;
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import android.view.MotionEvent;
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import android.view.View;
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import android.view.View.OnFocusChangeListener;
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import android.widget.EditText;
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import com.moral.andbrickslib.R;
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/**
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* @说明： 自定义带删除按钮的EditText
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*
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*/
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public class ClearEditText extends EditText implements OnFocusChangeListener,
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TextWatcher {
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//EditText右侧的删除按钮
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private Drawable mClearDrawable;
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private boolean hasFoucs;
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public ClearEditText(Context context) {
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this(context, null);
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}
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public ClearEditText(Context context, AttributeSet attrs) {
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this(context, attrs, android.R.attr.editTextStyle);
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}
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public ClearEditText(Context context, AttributeSet attrs, int defStyle) {
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super(context, attrs, defStyle);
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init();
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}
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private void init() {
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// 获取EditText的DrawableRight,假如没有设置我们就使用默认的图片,获取图片的顺序是左上右下（0,1,2,3,）
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mClearDrawable = getCompoundDrawables()[2];
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if (mClearDrawable == null) {
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mClearDrawable = getResources().getDrawable(
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R.mipmap.icon_delete);
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}
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mClearDrawable.setBounds(0, 0, mClearDrawable.getIntrinsicWidth(),
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mClearDrawable.getIntrinsicHeight());
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// 默认设置隐藏图标
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setClearIconVisible(false);
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// 设置焦点改变的监听
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setOnFocusChangeListener(this);
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// 设置输入框里面内容发生改变的监听
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addTextChangedListener(this);
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}
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/* @说明：isInnerWidth, isInnerHeight为ture，触摸点在删除图标之内，则视为点击了删除图标
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* event.getX() 获取相对应自身左上角的X坐标
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* event.getY() 获取相对应自身左上角的Y坐标
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* getWidth() 获取控件的宽度
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* getHeight() 获取控件的高度
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* getTotalPaddingRight() 获取删除图标左边缘到控件右边缘的距离
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* getPaddingRight() 获取删除图标右边缘到控件右边缘的距离
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* isInnerWidth:
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* getWidth() - getTotalPaddingRight() 计算删除图标左边缘到控件左边缘的距离
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* getWidth() - getPaddingRight() 计算删除图标右边缘到控件左边缘的距离
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* isInnerHeight:
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* distance 删除图标顶部边缘到控件顶部边缘的距离
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* distance + height 删除图标底部边缘到控件顶部边缘的距离
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*/
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@Override
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public boolean onTouchEvent(MotionEvent event) {
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if (event.getAction() == MotionEvent.ACTION_UP) {
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getParent().requestDisallowInterceptTouchEvent(false);
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if (getCompoundDrawables()[2] != null) {
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int x = (int)event.getX();
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int y = (int)event.getY();
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Rect rect = getCompoundDrawables()[2].getBounds();
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int height = rect.height();
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int distance = (getHeight() - height)/2;
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boolean isInnerWidth = x > (getWidth() - getTotalPaddingRight()) && x < (getWidth() - getPaddingRight());
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boolean isInnerHeight = y > distance && y <(distance + height);
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if (isInnerWidth && isInnerHeight) {
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this.setText("");
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}
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}
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}else if(event.getAction() == MotionEvent.ACTION_DOWN){
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getParent().requestDisallowInterceptTouchEvent(true);
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}else if(event.getAction() == MotionEvent.ACTION_MOVE){
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getParent().requestDisallowInterceptTouchEvent(true);
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}
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return super.onTouchEvent(event);
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}
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/**
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* 当ClearEditText焦点发生变化的时候，
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* 输入长度为零，隐藏删除图标，否则，显示删除图标
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*/
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@Override
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public void onFocusChange(View v, boolean hasFocus) {
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this.hasFoucs = hasFocus;
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if (hasFocus) {
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setClearIconVisible(getText().length() > 0);
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} else {
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setClearIconVisible(false);
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}
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}
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protected void setClearIconVisible(boolean visible) {
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Drawable right = visible ? mClearDrawable : null;
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setCompoundDrawables(getCompoundDrawables()[0],
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getCompoundDrawables()[1], right, getCompoundDrawables()[3]);
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}
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@Override
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public void onTextChanged(CharSequence s, int start, int count, int after) {
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if (hasFoucs) {
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setClearIconVisible(s.length() > 0);
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}
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}
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@Override
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public void beforeTextChanged(CharSequence s, int start, int count,
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int after) {
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}
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@Override
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public void afterTextChanged(Editable s) {
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}
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}
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