/***********************************************************************

 * mt4j Copyright (c) 2008 - 2010 Christopher Ruff, Fraunhofer-Gesellschaft All rights reserved.

 *  

 *   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 3 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, see <http://www.gnu.org/licenses/>.

 *

 ***********************************************************************/

package org.mt4j.components.visibleComponents.widgets;



import org.mt4j.components.TransformSpace;

import org.mt4j.components.visibleComponents.font.IFont;

import org.mt4j.components.visibleComponents.font.IFontCharacter;



import processing.core.PApplet;



/**

 * The Class MTTextField. This is a modifed text area, that

 * keeps a fixed size and ignores new lines ("\n").

 * So this is for single line of text with a fixed size no matter

 * how long the actual text is.

 * 

 * @author Christopher Ruff

 */

public class MTTextField extends MTTextArea {



	

	/**

	 * Instantiates a new mT text field.

	 *

	 * @param x the x

	 * @param y the y

	 * @param width the width

	 * @param height the height

	 * @param font the font

	 * @param applet the applet

	 * @deprecated constructor will be deleted! Please , use the constructor with the PApplet instance as the first parameter.

	 */

	public MTTextField(float x, float y, float width, float height, IFont font, PApplet applet) {

		this(applet, x, y, width, height, font);

	}

	

	

	/**

	 * Instantiates a new mT text field.

	 * @param applet the applet

	 * @param x the x

	 * @param y the y

	 * @param width the width

	 * @param height the height

	 * @param font the font

	 */

	public MTTextField(PApplet applet, float x, float y, float width, float height, IFont font) {

		super(applet, x, y, width,height, font);

	}

	

	

	/* (non-Javadoc)

	 * @see org.mt4j.components.visibleComponents.widgets.MTTextArea#characterAdded(org.mt4j.components.visibleComponents.font.IFontCharacter)

	 */

	protected void characterAdded(IFontCharacter character){

		//Intercept new line characters

		if (character.getUnicode().equalsIgnoreCase("\n")){

			this.removeLastCharacter(); 

		}else{

			//Scroll the text to the left if end of field reached

			float localWidth = this.getWidthXY(TransformSpace.LOCAL);

			if (this.getText().length() > 0 && getLastCharEndPos() > localWidth) {

			float diff = getLastCharEndPos() - localWidth;

			this.scrollTextX(-diff);

			}

		}

	}

	

	/* (non-Javadoc)

	 * @see org.mt4j.components.visibleComponents.widgets.MTTextArea#characterRemoved(org.mt4j.components.visibleComponents.font.IFontCharacter)

	 */

	@Override

	protected void characterRemoved(IFontCharacter character) {

		//Scroll the text to the right if scrolled

		if (this.getText().length() > 0 && this.getScrollTextX() < 0){

			if (this.getMaxLineWidth() < this.getWidthXY(TransformSpace.LOCAL)){

				this.scrollTextX(Math.abs(this.getScrollTextX()));	

			}else{

				this.scrollTextX(this.getWidthXY(TransformSpace.LOCAL) - this.getLastCharEndPos());	

			}

		}

	}

	

	/**

	 * Gets the last char end pos.

	 * 

	 * @return the last char end pos

	 */

	private float getLastCharEndPos(){

		return this.getMaxLineWidth() + this.getScrollTextX();

	}

	



}