IntegerEditTextPreference.java

/*
Copyright (C) 2012 Haowen Ning

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

package org.liberty.android.fantastischmemo.ui.widgets;

import android.content.Context;
import android.content.res.TypedArray;
import android.preference.EditTextPreference;
import android.util.AttributeSet;

import org.liberty.android.fantastischmemo.R;


/*
 * This class can be used in PreferenceActivity to persist
 * the Integer preferences.
 */
public class IntegerEditTextPreference extends EditTextPreference {
	private int maxIntValue;
	private int minIntValue;

    public IntegerEditTextPreference(Context context) {
        super(context);
    }

    public IntegerEditTextPreference(Context context, AttributeSet attrs) {
        super(context, attrs);
        TypedArray arr = context.obtainStyledAttributes(attrs, R.styleable.IntegerEditTextPreference);
        CharSequence maxCharValue = arr.getText(R.styleable.IntegerEditTextPreference_maxIntValue);
        CharSequence minCharValue = arr.getText(R.styleable.IntegerEditTextPreference_minIntValue);
        arr.recycle();

        if (maxCharValue != null) {
        	this.maxIntValue = Integer.parseInt(maxCharValue.toString());
        } else {
        	this.maxIntValue = Integer.MAX_VALUE;
        }

        if (minCharValue != null) {
        	this.minIntValue = Integer.parseInt(minCharValue.toString());
        } else {
        	this.minIntValue = Integer.MIN_VALUE;
        }

    }

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

    @Override
    protected String getPersistedString(String defaultReturnValue) {
        return String.valueOf(getPersistedInt(-1));
    }

    @Override
    protected boolean persistString(String value) {
    	int valueInt = Integer.parseInt(value);

    	valueInt = Math.min(valueInt, maxIntValue);
    	valueInt = Math.max(valueInt, minIntValue);

        return persistInt(valueInt);
    }


}