listitem.java

处理PDF

/*
 * $Id: ListItem.java 3373 2008-05-12 16:21:24Z xlv $
 *
 * Copyright 1999, 2000, 2001, 2002 by Bruno Lowagie.
 *
 * The contents of this file are subject to the Mozilla Public License Version 1.1
 * (the "License"); you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the License.
 *
 * The Original Code is 'iText, a free JAVA-PDF library'.
 *
 * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
 * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
 * All Rights Reserved.
 * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
 * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
 *
 * Contributor(s): all the names of the contributors are added in the source code
 * where applicable.
 *
 * Alternatively, the contents of this file may be used under the terms of the
 * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
 * provisions of LGPL are applicable instead of those above.  If you wish to
 * allow use of your version of this file only under the terms of the LGPL
 * License and not to allow others to use your version of this file under
 * the MPL, indicate your decision by deleting the provisions above and
 * replace them with the notice and other provisions required by the LGPL.
 * If you do not delete the provisions above, a recipient may use your version
 * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the MPL as stated above or under the terms of the GNU
 * Library General Public License as published by the Free Software Foundation;
 * either version 2 of the License, or any later version.
 *
 * This library 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 Library general Public License for more
 * details.
 *
 * If you didn't download this code from the following link, you should check if
 * you aren't using an obsolete version:
 * http://www.lowagie.com/iText/
 */

package com.lowagie.text;

/**
 * A <CODE>ListItem</CODE> is a <CODE>Paragraph</CODE>
 * that can be added to a <CODE>List</CODE>.
 * <P>
 * <B>Example 1:</B>
 * <BLOCKQUOTE><PRE>
 * List list = new List(true, 20);
 * list.add(<STRONG>new ListItem("First line")</STRONG>);
 * list.add(<STRONG>new ListItem("The second line is longer to see what happens once the end of the line is reached. Will it start on a new line?")</STRONG>);
 * list.add(<STRONG>new ListItem("Third line")</STRONG>);
 * </PRE></BLOCKQUOTE>
 *
 * The result of this code looks like this:
 *	<OL>
 *		<LI>
 *			First line
 *		</LI>
 *		<LI>
 *			The second line is longer to see what happens once the end of the line is reached. Will it start on a new line?
 *		</LI>
 *		<LI>
 *			Third line
 *		</LI>
 *	</OL>
 *
 * <B>Example 2:</B>
 * <BLOCKQUOTE><PRE>
 * List overview = new List(false, 10);
 * overview.add(<STRONG>new ListItem("This is an item")</STRONG>);
 * overview.add("This is another item");
 * </PRE></BLOCKQUOTE>
 *
 * The result of this code looks like this:
 *	<UL>
 *		<LI>
 *			This is an item
 *		</LI>
 *		<LI>
 *			This is another item
 *		</LI>
 *	</UL>
 *
 * @see	Element
 * @see List
 * @see	Paragraph
 */

public class ListItem extends Paragraph {
    
    // constants
	private static final long serialVersionUID = 1970670787169329006L;
	
	// member variables
	
	/** this is the symbol that will precede the listitem. */
    private Chunk symbol;
    
    // constructors
    
    /**
     * Constructs a <CODE>ListItem</CODE>.
     */
    public ListItem() {
        super();
    }
    
    /**
     * Constructs a <CODE>ListItem</CODE> with a certain leading.
     *
     * @param	leading		the leading
     */    
    public ListItem(float leading) {
        super(leading);
    }
    
    /**
     * Constructs a <CODE>ListItem</CODE> with a certain <CODE>Chunk</CODE>.
     *
     * @param	chunk		a <CODE>Chunk</CODE>
     */
    public ListItem(Chunk chunk) {
        super(chunk);
    }
    
    /**
     * Constructs a <CODE>ListItem</CODE> with a certain <CODE>String</CODE>.
     *
     * @param	string		a <CODE>String</CODE>
     */
    public ListItem(String string) {
        super(string);
    }
    
    /**
     * Constructs a <CODE>ListItem</CODE> with a certain <CODE>String</CODE>
     * and a certain <CODE>Font</CODE>.
     *
     * @param	string		a <CODE>String</CODE>
     * @param	font		a <CODE>String</CODE>
     */
    public ListItem(String string, Font font) {
        super(string, font);
    }
    
    /**
     * Constructs a <CODE>ListItem</CODE> with a certain <CODE>Chunk</CODE>
     * and a certain leading.
     *
     * @param	leading		the leading
     * @param	chunk		a <CODE>Chunk</CODE>
     */
    public ListItem(float leading, Chunk chunk) {
        super(leading, chunk);
    }
    
    /**
     * Constructs a <CODE>ListItem</CODE> with a certain <CODE>String</CODE>
     * and a certain leading.
     *
     * @param	leading		the leading
     * @param	string		a <CODE>String</CODE>
     */
    public ListItem(float leading, String string) {
        super(leading, string);
    }
    
    /**
     * Constructs a <CODE>ListItem</CODE> with a certain leading, <CODE>String</CODE>
     * and <CODE>Font</CODE>.
     *
     * @param	leading		the leading
     * @param	string		a <CODE>String</CODE>
     * @param	font		a <CODE>Font</CODE>
     */
    public ListItem(float leading, String string, Font font) {
        super(leading, string, font);
    }
    
    /**
     * Constructs a <CODE>ListItem</CODE> with a certain <CODE>Phrase</CODE>.
     *
     * @param	phrase		a <CODE>Phrase</CODE>
     */
    public ListItem(Phrase phrase) {
        super(phrase);
    }
    
    // implementation of the Element-methods
    
    /**
     * Gets the type of the text element.
     *
     * @return	a type
     */
    public int type() {
        return Element.LISTITEM;
    }
    
    // methods
    
    /**
     * Sets the listsymbol.
     *
     * @param	symbol	a <CODE>Chunk</CODE>
     */
    public void setListSymbol(Chunk symbol) {
    	if (this.symbol == null) {
    		this.symbol = symbol;
    		if (this.symbol.getFont().isStandardFont()) {
    			this.symbol.setFont(font);
    		}
    	}
    }
    
    /**
     * Sets the indentation of this paragraph on the left side.
     *
     * @param	indentation		the new indentation
     */
    public void setIndentationLeft(float indentation, boolean autoindent) {
    	if (autoindent) {
    		setIndentationLeft(getListSymbol().getWidthPoint());
    	}
    	else {
    		setIndentationLeft(indentation);
    	}
    }
    
    // methods to retrieve information

	/**
     * Returns the listsymbol.
     *
     * @return	a <CODE>Chunk</CODE>
     */
    public Chunk getListSymbol() {
        return symbol;
    }

}