stylesheet.java

j2me polish学习的经典代码

/*
 * Created on 05-Jan-2004 at 20:41:52.
 *
 * 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 java.io.IOException;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Timer;

import javax.microedition.lcdui.CommandListener;  					import javax.microedition.lcdui.AlertType; 					import javax.microedition.lcdui.Canvas; 					import javax.microedition.lcdui.Command; 					import javax.microedition.lcdui.Display; 					import javax.microedition.lcdui.Displayable; 					import javax.microedition.lcdui.Font; 					import javax.microedition.lcdui.Graphics; 					import javax.microedition.lcdui.Image;

//import ImageTask;
//import Locale;

/**
 * <p>Manages all defined styles of a specific project.</p>
 * <p>This class is actually pre-processed to get the styles specific for the project and the device.</p>
 *
 * @author Robert Virkus, [e-mail]
 * <pre>
 * history
 *        05-Jan-2004 - rob creation
 * </pre>
 */
public final class StyleSheet {
	
	protected static Hashtable imagesByName;
	//#ifdef polish.images.backgroundLoad
		//# private static Hashtable scheduledImagesByName;
		//# //private static final Boolean TRUE = new Boolean( true );
		//# private static Timer timer;
	//#endif
	//#ifdef false
		//# public static Style defaultStyle = null;
		//# public static Style focusedStyle = null;
		//# public static Style labelStyle = null; 
		//# public static Style menuStyle = null;
		//# private static Hashtable stylesByName = new Hashtable();
	//#endif

	//#if polish.ScreenChangeAnimation.forward:defined
		//#if false
			//# private static ScreenChangeAnimation forwardAnimation;
			//# private static ScreenChangeAnimation backwardAnimation;			
		//#endif
		//#= private static ScreenChangeAnimation forwardAnimation = ${polish.ScreenChangeAnimation.forward};
		//#if polish.ScreenChangeAnimation.back:defined
			//#= private static ScreenChangeAnimation backwardAnimation = ${polish.ScreenChangeAnimation.back};
		//#elif polish.ScreenChangeAnimation.backward:defined
			//#= private static ScreenChangeAnimation backwardAnimation = ${polish.ScreenChangeAnimation.backward};
		//#else
			//#abort You need to define the polish.ScreenChangeAnimation.backward screen change animation as well, when you define the forward animation!
		//#endif
	//#endif

	
	
	// do not change the following line!
//$$IncludeStyleSheetDefinitionHere$$//
	public final static int defaultFontColor = 0x000000;
	public final static Font defaultFont = Font.getFont( Font.FACE_SYSTEM, Font.STYLE_PLAIN, Font.SIZE_MEDIUM );
	public final static Background defaultBackground = null;
	public final static Border defaultBorder = null;
	public final static Style defaultStyle = new Style (
		0,0,0,0,	// default margin
		1,1,1,1,1,1,	// default padding
		Item.LAYOUT_DEFAULT,	// default layout
		defaultFontColor,
		null,
		defaultFont,
		defaultBackground, 
		defaultBorder 
		, null, null	// no additional attributes have been defined
	);
	//static and referenced styles:
	public final static Style mainscreenStyle = new Style (
		0,0,0,0,	// default margin
		15,15,5,5,5,5,	// padding
		Item.LAYOUT_DEFAULT,	// default layout
		defaultFontColor,	// font-color is not defined
		null,	// font-color is not defined
		defaultFont,
		new SimpleBackground( new Color( 0xeef1e5, false)),
		null	// no border
		, null, null	// no additional attributes have been defined
	);
	public final static Style titleStyle = new Style (
		0,0,0,5,	// margin
		2,2,2,2,2,2,	// padding
		Item.LAYOUT_CENTER | Item.LAYOUT_EXPAND,
		0xFF0000,	// font-color
		new Color(0xFF0000, false),	// font-color
		Font.getFont( Font.FACE_PROPORTIONAL, Font.STYLE_BOLD, Font.SIZE_SMALL ), //font
		new SimpleBackground( new Color( 0x848f60, false)),
		null	// border:none was specified
		, null, null	// no additional attributes have been defined
	);
	public final static Style alertcontentStyle = new Style (
		0,0,0,0,	// default margin
		1,1,1,1,1,1,	// default padding
		Item.LAYOUT_DEFAULT,	// default layout
		0x1e5556,	// font-color
		new Color(0x1e5556, false),	// font-color
		Font.getFont( Font.FACE_SYSTEM, Font.STYLE_BOLD, Font.SIZE_SMALL ), //font
		null,	// no background
		null	// no border
		, null, null	// no additional attributes have been defined
	);
	public final static Style alertStyle = new Style (
		0,0,0,0,	// default margin
		15,15,5,5,5,5,	// padding
		Item.LAYOUT_DEFAULT,	// default layout
		defaultFontColor,	// font-color is not defined
		null,	// font-color is not defined
		defaultFont,
		new SimpleBackground( new Color( 0xeef1e5, false)),
		null	// no border
		, null, null	// no additional attributes have been defined
	);
	public final static Style menuitemStyle = new Style (
		0,0,2,0,	// margin
		5,2,2,2,2,2,	// padding
		Item.LAYOUT_RIGHT,
		0x1e5556,	// font-color
		new Color(0x1e5556, false),	// font-color
		Font.getFont( Font.FACE_SYSTEM, Font.STYLE_BOLD, Font.SIZE_MEDIUM ), //font
		null,	// no background
		null	// no border
		, null, null	// no additional attributes have been defined
	);
	public final static Style mystyleStyle = new Style (
		0,0,0,0,	// default margin
		1,1,1,1,1,1,	// default padding
		Item.LAYOUT_EXPAND | Item.LAYOUT_CENTER,
		defaultFontColor,	// font-color is not defined
		null,	// font-color is not defined
		defaultFont,
		null,	// no background
		null	// no border
		, null, null	// no additional attributes have been defined
	);
	public final static Style focusedStyle = new Style (
		0,0,0,0,	// default margin
		5,5,5,5,5,5,	// padding
		Item.LAYOUT_EXPAND | Item.LAYOUT_CENTER,
		0x1e5556,	// font-color
		new Color(0x1e5556, false),	// font-color
		Font.getFont( Font.FACE_SYSTEM, Font.STYLE_BOLD, Font.SIZE_SMALL ), //font
		new BorderedRoundRectBackground( 0xeef1e5,8, 8, 0x1e5556, 2),
		null	// no border
		, null, null	// no additional attributes have been defined
	);
	public final static Style menufocusedStyle = new Style (
		0,0,2,0,	// margin
		5,2,2,2,2,2,	// padding
		Item.LAYOUT_LEFT | Item.LAYOUT_EXPAND,
		0xeef1e5,	// font-color
		new Color(0xeef1e5, false),	// font-color
		Font.getFont( Font.FACE_SYSTEM, Font.STYLE_BOLD, Font.SIZE_MEDIUM ), //font
		new SimpleBackground( new Color( 0x848f60, false)),
		null	// no border
		, null, null	// no additional attributes have been defined
	);
	public final static Style menuStyle = new Style (
		2,0,0,0,	// margin
		2,2,2,2,2,2,	// padding
		Item.LAYOUT_DEFAULT,	// default layout
		0xeef1e5,	// font-color
		new Color(0xeef1e5, false),	// font-color
		Font.getFont( Font.FACE_SYSTEM, Font.STYLE_BOLD, Font.SIZE_MEDIUM ), //font
		new BorderedRoundRectBackground( 0xFF0000,10, 10, 0x848f60, 2),
		null	// no border
		, new short[]{ 1, 16}
		, new Object[]{ menufocusedStyle, new Color( 0x000000, false)}
	);
	public final static String lic="GPL";
	public static Style labelStyle = defaultStyle; // no specific label-style has been defined
	//dynamic styles:
	static final Hashtable stylesByName = new Hashtable(10);
	static { 	//register referenced and dynamic styles:
		stylesByName.put( "0", menufocusedStyle );
		stylesByName.put( "mystyle", mystyleStyle );
		stylesByName.put( "mainscreen", mainscreenStyle );
	defaultStyle.name = "default"; 	// the selector of the above style
	mainscreenStyle.name = "mainscreen"; 	// the selector of the above style
	titleStyle.name = "title"; 	// the selector of the above style
	alertcontentStyle.name = "alertcontent"; 	// the selector of the above style
	alertStyle.name = "alert"; 	// the selector of the above style
	menuitemStyle.name = "menuitem"; 	// the selector of the above style
	mystyleStyle.name = "mystyle"; 	// the selector of the above style
	focusedStyle.name = "focused"; 	// the selector of the above style
	menufocusedStyle.name = "menufocused"; 	// the selector of the above style
	menuStyle.name = "menu"; 	// the selector of the above style
	}
		
	public static Screen currentScreen;	
	public static Display display;
	public static AnimationThread animationThread;
	//#ifdef polish.i18n.useDynamicTranslations
		//# public static Command OK_CMD = new Command( "OK", Command.OK, 2 );
	//#elifdef polish.command.ok:defined
public static final Command OK_CMD = new Command("OK", Command.OK, 2 );
	//#else
		//# public static final Command OK_CMD = new Command("OK", Command.OK, 2 );
	//#endif
	//#ifdef polish.i18n.useDynamicTranslations
		//# public static Command CANCEL_CMD = new Command("Cancel", Command.CANCEL, 2 );
	//#elifdef polish.command.cancel:defined
public static final Command CANCEL_CMD = new Command("Cancel", Command.CANCEL, 3 );
	//#else
		//# public static final Command CANCEL_CMD = new Command("Cancel", Command.CANCEL, 3 );
	//#endif

	//#if polish.ScreenChangeAnimation.allowConfiguration == true
		//# public static boolean enableScreenChangeAnimations = true;
	//#endif

	/**
	 * Retrieves the image with the given name.
	 * When the image has been cached before, it will be returned immediately.
	 * When it has not been cached before, it either will be loaded directly
	 * or in a background thread. This behaviour is set in the 
	 * <a href="../../../../definitions/polish_xml.html">polish.xml</a> file.
	 * 
	 * @param url the URL of the Image, e.g. "/background.png"
	 * @param parent the object which needs the image, when the image should be loaded
	 * 		   		in the background, the parent need to implement
	 * 				the ImageConsumer interface when it wants to be notified when
	 * 				the picture has been loaded.
	 * @param cache true when the image should be cached for later retrieval.
	 *              This costs RAM obviously, so you should decide carefully if
	 *              large images should be cached.
	 * @return the image when it either was cached or is loaded directly.
 	 *              When the should be loaded in the background, it will be later
	 *              set via the ImageConsumer.setImage()-method.
	 * @throws IOException when the image could not be loaded directly
	 * @see ImageConsumer#setImage(String, Image)
	 */
	public static Image getImage( String url, Object parent, boolean cache )
	throws IOException 
	{
		// check if the image has been cached before:
		//#if polish.allowImageCaching != false
			if ( imagesByName != null ) {
				Image image = (Image) imagesByName.get( url );
				if (image != null) {
					return image;
				}
			}
		//#endif
		//#ifdef polish.images.directLoad
			// when images should be loaded directly, try to do so now:
			//#ifdef polish.classes.ImageLoader:defined
				//#= Image image = ${ classname( polish.classes.ImageLoader ) }.loadImage( url );
			//#else
				Image image = Image.createImage( url );
			//#endif
			//#if polish.allowImageCaching != false
				if (cache) {
					if (imagesByName == null ) {
						imagesByName = new Hashtable();
					}
					imagesByName.put( url, image );
				}
			//#endif
			return image;
		//#else
			//# // when images should be loaded in the background, 
			//# // tell the background-thread to do so now:		
			//# if ( ! (parent instanceof ImageConsumer)) {
				//#debug error
				//# System.out.println("StyleSheet.getImage(..) needs an ImageConsumer when images are loaded in the background!");
				//# return null;
			//# }
			//# if (scheduledImagesByName == null ) {
				//# scheduledImagesByName = new Hashtable();
			//# }
			//# ImageQueue queue = (ImageQueue) scheduledImagesByName.get(url);
			//# if (queue != null) {
				//# // this image is already scheduled to load:
				//# queue.addConsumer((ImageConsumer) parent);
				//# return null;
			//# }
			//# scheduledImagesByName.put( url, new ImageQueue( (ImageConsumer) parent, cache ) );
			//# if (imagesByName == null ) {
				//# imagesByName = new Hashtable();
			//# }
			//# if (timer == null) {
				//# timer = new Timer();
			//# }
			//# ImageTask task = new ImageTask( url );
			//# timer.schedule( task, 10 );
			//# return null;
		//#endif
	}
	
	//#ifdef polish.images.backgroundLoad
	//# /**
	 //# * Notifies the GUI items which requested images about the successful loading of thoses images.
	 //# * 
	 //# * @param name the URL of the image
	 //# * @param image the image 
	 //# */
	//# public static void notifyImageConsumers( String name, Image image ) {
		//# ImageQueue queue = (ImageQueue) scheduledImagesByName.remove(name);
		//# if (queue != null) {
			//# if (queue.cache) {
				//# imagesByName.put( name, image );
			//# }
			//# queue.notifyConsumers(name, image);
			//# if (true) {
				//# return;
			//# }