de.struckmeierfliesen.ds.wochenbericht.ClearableEditText.java Source code

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Here is the source code for de.struckmeierfliesen.ds.wochenbericht.ClearableEditText.java

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/**
 * Copyright 2015 Alex Yanchenko
 * <p/>
 * 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
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * 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 de.struckmeierfliesen.ds.wochenbericht;

import android.content.Context;
import android.graphics.drawable.Drawable;
import android.support.v4.content.ContextCompat;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnFocusChangeListener;
import android.view.View.OnTouchListener;
import android.widget.EditText;

import static org.apache.commons.lang3.StringUtils.isNotEmpty;

/**
 * To change clear icon, set
 *
 * <pre>
 * android:drawableRight="@drawable/custom_icon"
 * </pre>
 */
public class ClearableEditText extends EditText
        implements OnTouchListener, OnFocusChangeListener, TextWatcherAdapter.TextWatcherListener {

    public interface TextClearListener {
        void didClearText();
    }

    public void setTextClearListener(TextClearListener textClearListener) {
        this.textClearListener = textClearListener;
    }

    private Drawable xD;
    private TextClearListener textClearListener;
    private static double DRAWABLE_MULTIPLIER = 1;

    public ClearableEditText(Context context) {
        super(context);
        init();
    }

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

    public ClearableEditText(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init();
    }

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

    @Override
    public void setOnFocusChangeListener(OnFocusChangeListener f) {
        this.f = f;
    }

    private OnTouchListener l;
    private OnFocusChangeListener f;

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        if (getCompoundDrawables()[2] != null) {
            boolean tappedX = event.getX() > (getWidth() - getPaddingRight()
                    - (int) (xD.getIntrinsicWidth() * DRAWABLE_MULTIPLIER));
            if (tappedX) {
                if (event.getAction() == MotionEvent.ACTION_UP) {
                    setText("");
                    if (textClearListener != null) {
                        textClearListener.didClearText();
                    }
                }
                return true;
            }
        }
        if (l != null) {
            return l.onTouch(v, event);
        }
        return false;
    }

    @Override
    public void onFocusChange(View v, boolean hasFocus) {
        if (hasFocus) {
            setClearIconVisible(isNotEmpty(getText()));
        } else {
            setClearIconVisible(false);
        }
        if (f != null) {
            f.onFocusChange(v, hasFocus);
        }
    }

    @Override
    public void onTextChanged(EditText view, String text) {
        if (isFocused()) {
            setClearIconVisible(isNotEmpty(text));
        }
    }

    private void init() {
        xD = getCompoundDrawables()[2];
        if (xD == null) {
            xD = ContextCompat.getDrawable(getContext(), R.drawable.ic_clear_black_24dp);//android.R.drawable.presence_offline);
        }
        xD.setBounds(0, 0, (int) (xD.getIntrinsicWidth() * DRAWABLE_MULTIPLIER),
                (int) (xD.getIntrinsicHeight() * DRAWABLE_MULTIPLIER));
        setClearIconVisible(false);
        super.setOnTouchListener(this);
        super.setOnFocusChangeListener(this);
        addTextChangedListener(new TextWatcherAdapter(this, this));
    }

    protected void setClearIconVisible(boolean visible) {
        boolean wasVisible = (getCompoundDrawables()[2] != null);
        if (visible != wasVisible) {
            Drawable x = visible ? xD : null;
            setCompoundDrawables(getCompoundDrawables()[0], getCompoundDrawables()[1], x,
                    getCompoundDrawables()[3]);
        }
    }
}