stringitem.java

j2me polish学习的经典代码

//#condition polish.usePolishGui
// generated by de.enough.doc2java.Doc2Java (www.enough.de) on Sat Dec 06 15:06:43 CET 2003
/*
 * Copyright (c) 2004-2005 Robert Virkus / Enough Software
 *
 * This file is part of J2ME Polish.
 *
 * J2ME Polish 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.
 * 
 * J2ME Polish 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 J2ME Polish; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * 
 * Commercial licenses are also available, please
 * refer to the accompanying LICENSE.txt or visit
 * http://www.j2mepolish.org for details.
 */
package de.enough.polish.ui;

import de.enough.polish.util.BitMapFont;
import de.enough.polish.util.BitMapFontViewer;
import de.enough.polish.util.TextUtil;

import javax.microedition.lcdui.Font;
import javax.microedition.lcdui.Graphics;

/**
 * An item that can contain a string.
 * 
 * A <code>StringItem</code> is display-only; the user
 * cannot edit the contents. Both the label and the textual content of a
 * <code>StringItem</code> may be modified by the application. The
 * visual representation
 * of the label may differ from that of the textual contents.
 * 
 * @author Robert Virkus, [e-mail]
 */
public class StringItem extends Item
{
	protected String text;
	protected String[] textLines;
	protected int textColor;
	protected Font font;
	//#ifdef polish.css.font-bitmap
		protected BitMapFont bitMapFont;
		protected BitMapFontViewer bitMapFontViewer;
	//#endif
	//#ifdef polish.css.text-wrap
		protected boolean useSingleLine;
		protected boolean clipText;
		protected int xOffset;
		private int textWidth;
		private boolean isHorizontalAnimationDirectionRight;
		private boolean isSkipHorizontalAnimation;
	//#endif
	//#ifdef polish.css.text-horizontal-adjustment
		protected int textHorizontalAdjustment;
	//#endif
	//#ifdef polish.css.text-vertical-adjustment
		protected int textVerticalAdjustment;
	//#endif
	//#ifdef polish.css.text-effect
		protected TextEffect textEffect;
	//#endif

	/**
	 * Creates a new <code>StringItem</code> object.  Calling this
	 * constructor is equivalent to calling
	 * 
	 * <pre><code>
	 * StringItem(label, text, Item.PLAIN, null);     
	 * </code></pre>
	 * 
	 * @param label the Item label
	 * @param text the text contents
	 * @see #StringItem(String, String, int, Style)
	 */
	public StringItem( String label, String text)
	{
		this( label, text, PLAIN );
	}

	/**
	 * Creates a new <code>StringItem</code> object.  Calling this
	 * constructor is equivalent to calling
	 * 
	 * <pre><code>
	 * StringItem(label, text, Item.PLAIN, style);     
	 * </code></pre>
	 * 
	 * @param label the Item label
	 * @param text the text contents
	 * @param style the style
	 * @see #StringItem(String, String, int, Style)
	 */
	public StringItem( String label, String text, Style style )
	{
		
		this( label, text, PLAIN, style );
		if(style == null){
			System.out.println("null");
		}else{
			System.out.println("123");
		}
	}
	
	
	/**
	 * Creates a new <code>StringItem</code> object with the given label,
	 * textual content, and appearance mode.
	 * Either label or text may be present or <code>null</code>.
	 * 
	 * <p>The <code>appearanceMode</code> parameter
	 * (see <a href="Item.html#appearance">Appearance Modes</a>)
	 * is a hint to the platform of the application's intended use
	 * for this <code>StringItem</code>.  To provide hyperlink- or
	 * button-like behavior,
	 * the application should associate a default <code>Command</code> with this
	 * <code>StringItem</code> and add an
	 * <code>ItemCommandListener</code> to this
	 * <code>StringItem</code>.
	 * 
	 * <p>Here is an example showing the use of a
	 * <code>StringItem</code> as a button: </p>
	 * <pre><code>
	 * StringItem strItem = new StringItem("Default: ", "Set", Item.BUTTON);
	 * strItem.setDefaultCommand(
	 * new Command("Set", Command.ITEM, 1);
	 * // icl is ItemCommandListener
	 * strItem.setItemCommandListener(icl);     
	 * </code></pre>
	 * 
	 * @param label the StringItem's label, or null if no label
	 * @param text the StringItem's text contents, or null if the contents are initially empty
	 * @param appearanceMode the appearance mode of the StringItem, one of Item.PLAIN, Item.HYPERLINK, or Item.BUTTON
	 * @throws IllegalArgumentException if appearanceMode invalid
	 * @since  MIDP 2.0
	 */
	public StringItem( String label, String text, int appearanceMode)
	{
		this( label, text, appearanceMode, null );
	}

	/**
	 * Creates a new <code>StringItem</code> object with the given label,
	 * textual content, and appearance mode.
	 * Either label or text may be present or <code>null</code>.
	 * 
	 * <p>The <code>appearanceMode</code> parameter
	 * (see <a href="Item.html#appearance">Appearance Modes</a>)
	 * is a hint to the platform of the application's intended use
	 * for this <code>StringItem</code>.  To provide hyperlink- or
	 * button-like behavior,
	 * the application should associate a default <code>Command</code> with this
	 * <code>StringItem</code> and add an
	 * <code>ItemCommandListener</code> to this
	 * <code>StringItem</code>.
	 * 
	 * <p>Here is an example showing the use of a
	 * <code>StringItem</code> as a button: </p>
	 * <pre><code>
	 * StringItem strItem = new StringItem("Default: ", "Set", Item.BUTTON);
	 * strItem.setDefaultCommand(
	 * new Command("Set", Command.ITEM, 1);
	 * // icl is ItemCommandListener
	 * strItem.setItemCommandListener(icl);     
	 * </code></pre>
	 * 
	 * @param label the StringItem's label, or null if no label
	 * @param text the StringItem's text contents, or null if the contents are initially empty
	 * @param appearanceMode the appearance mode of the StringItem, one of Item.PLAIN, Item.HYPERLINK, or Item.BUTTON
	 * @param style the style for this item
	 * @throws IllegalArgumentException if appearanceMode invalid
	 * @since  MIDP 2.0
	 */
	public StringItem( String label, String text, int appearanceMode, Style style )
	{
		super( label, LAYOUT_DEFAULT, appearanceMode, style );
		this.text = text;
	}
	
	
	//#if polish.css.text-effect || polish.css.text-wrap
	/* (non-Javadoc)
	 * @see de.enough.polish.ui.Item#animate()
	 */
	public boolean animate() {
		boolean animated = super.animate();
		//#if polish.css.text-effect 
			if (this.textEffect != null) {
				animated |= this.textEffect.animate();
			}
		//#endif
		//#if polish.css.text-wrap
			if (this.useSingleLine && this.clipText) {
				if (this.isSkipHorizontalAnimation) {
					this.isSkipHorizontalAnimation = false;
				} else {
					if (this.isHorizontalAnimationDirectionRight) {
						this.xOffset++;
						if (this.xOffset >= 0) {
							this.isHorizontalAnimationDirectionRight = false;
						}
					} else {
						this.xOffset--;
						if (this.xOffset + this.textWidth < this.contentWidth) {
							this.isHorizontalAnimationDirectionRight = true;
						}
					}
					animated = true;
					this.isSkipHorizontalAnimation = true;
				}
			}
		//#endif
		return animated;
	}
	//#endif
	
	//#if polish.css.text-wrap
	/* (non-Javadoc)
	 * @see de.enough.polish.ui.Item#defocus(de.enough.polish.ui.Style)
	 */
	protected void defocus(Style originalStyle) {
		super.defocus(originalStyle);
		if (this.clipText) {
			this.xOffset = 0;
		}
	}	
	//#endif


	//#ifdef polish.css.text-effect
	/* (non-Javadoc)
	 * @see de.enough.polish.ui.Item#hideNotify()
	 */
	protected void hideNotify() {
		if (this.textEffect != null) {
			this.textEffect.hideNotify();
		}
		super.hideNotify();
	}
	//#endif

	//#ifdef polish.css.text-effect
	/* (non-Javadoc)
	 * @see de.enough.polish.ui.Item#showNotify()
	 */
	protected void showNotify() {
		if (this.textEffect != null) {
			this.textEffect.showNotify();
		}
		super.showNotify();
	}
	//#endif

	
	/**
	 * Gets the text contents of the <code>StringItem</code>, or
	 * <code>null</code> if the <code>StringItem</code> is
	 * empty.
	 * 
	 * @return a string with the content of the item
	 * @see #setText(java.lang.String)
	 */
	public String getText()
	{
		return this.text;
	}

	/**
	 * Sets the text contents of the <code>StringItem</code>. 
	 * If text
	 * is <code>null</code>,
	 * the <code>StringItem</code>
	 * is set to be empty.
	 * 
	 * @param text the new content
	 * @see #getText()
	 */
	public void setText( String text)
	{
		setText( text, null );
	}
	
	/**
	 * Sets the text contents of the <code>StringItem</code> along with a style. 
	 * If text is <code>null</code>,
	 * the <code>StringItem</code>
	 * is set to be empty.
	 * 
	 * @param text the new content
	 * @param style the new style, is ignored when null
	 * @see #getText()
	 */
	public void setText( String text, Style style)
	{
		//#debug
		System.out.println("StringItem: setText( \"" + text + "\" )");
		if ( style != null ) {