inputcomponent.java

FIRE (Flexible Interface Rendering Engine)是一个J2ME上的灵活的图形界面引擎

/*
 * Fire (Flexible Interface Rendering Engine) is a set of graphics widgets for creating GUIs for j2me applications. 
 * Copyright (C) 2006-2008 Bluevibe (www.bluevibe.net)
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 */

/**
 * 
 */
package gr.fire.ui;

import gr.fire.core.Component;
import gr.fire.core.FireScreen;
import gr.fire.core.Theme;
import gr.fire.util.StringUtil;

import java.util.Vector;

import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.TextField;


/**
 * @author padeler
 *
 */
public class InputComponent extends Component
{
	public static final int LINE_DISTANCE=0;
	
	public static final byte TEXT=0x01;
	public static final byte RADIO=0x02;
	public static final byte CHECKBOX=0x03;
	public static final byte SWITCH=0x04;
	public static final byte BUTTON=0x05;
	public static final byte SUBMIT=0x06;
	public static final byte RESET=0x07;
	public static final byte MENU=0x08;
	public static final byte HIDDEN=0x09;
	
	public static final int RADIO_WIDTH=16;
	public static final int RADIO_HEIGHT=16;
	
	public static final int TEXT_BORDER=4;
	public static final int SWITCH_BORDER=3;

	protected String name,value,initialValue,text;
	protected boolean enabled=true;
	protected int maxWidth=1000;

	private byte type=TEXT;	
	private int size=200,maxLen=100,rows=1;	
	private boolean checked=false;
	private int textConstraints = TextField.ANY;

	private Vector formatedText=null;
	
	
	public InputComponent()
	{}
	
	public InputComponent(byte type)
	{
		this.type=type;
		if(font==null)
			font = FireScreen.getTheme().getFontProperty("font");
	}
	
	public void validate()
	{
		
		int []ps= getPrefSize();
		if(ps==null)
		{
			ps = getMinSize();
		}
		
		if(type==TEXT)
		{
			formatedText = StringUtil.format(value,font,ps[0],ps[1]);
		}
		
		if(width==0 && height==0) // width, height are not set
		{
			width = ps[0];height=ps[1];
		}
		
		valid=true;
	}
	
	public boolean isFocusable()
	{
		return enabled;
	}
	
	public void paint(Graphics g)
	{
		switch (type)
		{
		case TEXT:
			paintText(g);
			break;
		case RADIO:
			paintRadioOrCheckbox(g);
			break;
		case CHECKBOX:
			paintRadioOrCheckbox(g);
			break;
		case BUTTON:
			paintButton(g);
			break;
		case RESET:
			paintButton(g);
			break;
		case SUBMIT:
			paintButton(g);
			break;
		case SWITCH:
			paintSwitch(g);
			break;
		case MENU:
			paintMenu(g);
			break;
		}
	}
	
	private void paintSwitch(Graphics g)
	{
		// create a bordered area with the text inside.
		int valign = getValign();
		int halign = getHalign();
		
		Theme theme = FireScreen.getTheme();
		int width = getWidth();
		int height = getHeight();
		g.setFont(font);
		
		if(isSelected())
		{
			g.setColor(theme.getIntProperty("link.active.bg.color"));
			g.fillRect(0,0,width,height);
		}
		else if(checked)
		{
			g.setColor(theme.getIntProperty("bg.alt2.color"));
			g.fillRect(0,0,width,height);
		}
		else if(backgroundColor!=Theme.TRANSPARENT)
		{
			g.setColor(backgroundColor);
			g.fillRect(0,0,width,height);
		}
			
		
		int rowHeight = font.getHeight();

		String str = text;
		
		int x=0,y=0;
		switch(valign)
		{
		case FireScreen.TOP:
			y = SWITCH_BORDER;
			break;
		case FireScreen.VCENTER:
			y = (height -(rowHeight+LINE_DISTANCE))/2;
			break;
		case FireScreen.BOTTOM:
			y = height - ((rowHeight+LINE_DISTANCE) )-SWITCH_BORDER;
			break;	
		}
		
		switch(halign)
		{
		case FireScreen.LEFT:
			x =SWITCH_BORDER;
			break;
		case FireScreen.CENTER:
			x = width/2 - font.stringWidth(str)/2;
			break;
		case FireScreen.RIGHT:
			x = width- font.stringWidth(str)-SWITCH_BORDER;
			break;
		}

		if(isSelected())
			g.setColor(theme.getIntProperty("link.active.fg.color"));
		else
			g.setColor(foregroundColor);
		
		g.drawString(str,x, y, Graphics.TOP | Graphics.LEFT);

	}
	
	private void paintMenu(Graphics g)
	{
		// create a bordered area with the text inside.
		int valign = getValign();
		int halign = getHalign();
		
		Theme theme = FireScreen.getTheme();
		int width = getWidth();
		int height = getHeight();
		g.setFont(font);
		
		g.setColor(theme.getIntProperty("bg.alt2.color"));
		g.fillRect(2,2,width-3,height-3);
		
		int rowHeight = font.getHeight();

		String str = text;
		
		int x=0,y=0;
		switch(valign)
		{
		case FireScreen.TOP:
			y = SWITCH_BORDER;
			break;
		case FireScreen.VCENTER:
			y = (height -(rowHeight+LINE_DISTANCE))/2;
			break;
		case FireScreen.BOTTOM:
			y = height - ((rowHeight+LINE_DISTANCE) )-SWITCH_BORDER;
			break;	
		}
		
		switch(halign)
		{
		case FireScreen.LEFT:
			x =SWITCH_BORDER;
			break;
		case FireScreen.CENTER:
			x = width/2 - font.stringWidth(str)/2;
			break;
		case FireScreen.RIGHT:
			x = width- font.stringWidth(str)-SWITCH_BORDER;
			break;
		}

		if(!isSelected())
			g.setColor(foregroundColor);
		else
			g.setColor(theme.getIntProperty("link.active.fg.color"));

		g.drawString(str,x, y, Graphics.TOP | Graphics.LEFT);
	
		g.setColor(theme.getIntProperty("border.color"));
		g.drawRect(2,2,width-4,height-4);
		
		if(isSelected())
		{
			g.setColor(theme.getIntProperty("link.active.bg.color"));
			g.drawRect(1,1,width-2,height-2);			
		}
	}


	private void paintButton(Graphics g)
	{
		if(formatedText==null)
		{
			int[] ps = getPrefSize();
			if(ps==null) ps = getMinSize();
			formatedText = StringUtil.format(value,font,ps[0],ps[1]);
		}
		// create a bordered area with the text inside.
		int valign = getValign();
		int halign = getHalign();
		
		Theme theme = FireScreen.getTheme();
		int width = getWidth();
		int height = getHeight();
		g.setFont(font);
		Vector lines = formatedText;
		//g.setColor(theme.getIntProperty("bg.alt2.color"));
		if(backgroundColor!=Theme.TRANSPARENT)
			g.setColor(backgroundColor);
		else
			g.setColor(theme.getIntProperty("bg.alt2.color"));
		g.fillRoundRect(2,2,width-4,height-4,6,6);
		
		int rowHeight = font.getHeight();
		int lineCount = lines.size();
		int txtHeight = (rowHeight + LINE_DISTANCE)*lines.size();

		for (int i = 0; i < lineCount && i<rows; ++i)
		{
			String str = (String) lines.elementAt(i);
			
			if((textConstraints & TextField.PASSWORD) == TextField.PASSWORD)
			{ // just draw a string of starts
				int len = str.length();
				str="";
				for (int j = 0; j < len; ++j)
					str += "*";
			}
			
			int x=0,y=0;
			switch(valign)
			{
			case FireScreen.TOP:
				y = (rowHeight+LINE_DISTANCE) * i +TEXT_BORDER;
				break;
			case FireScreen.VCENTER:
				y = (height/2 - txtHeight/2) +  (rowHeight+LINE_DISTANCE) * i;
				break;
			case FireScreen.BOTTOM:
				y = height - txtHeight +((rowHeight+LINE_DISTANCE) * i)-TEXT_BORDER;
				break;	
			}
			
			switch(halign)
			{
			case FireScreen.LEFT:
				x =TEXT_BORDER;
				break;
			case FireScreen.CENTER:
				x = width/2 - font.stringWidth(str)/2;
				break;
			case FireScreen.RIGHT:
				x = width- font.stringWidth(str)-TEXT_BORDER;
				break;
			}

			if(!isSelected())
				g.setColor(foregroundColor);
			else
				g.setColor(theme.getIntProperty("link.active.fg.color"));

			g.drawString(str,x, y, Graphics.TOP | Graphics.LEFT);
		}

		
		if(isSelected())
		{
			g.setColor(theme.getIntProperty("link.active.bg.color"));
			g.drawRoundRect(1,1,width-2,height-2,8,8);
		}
		else
		{
			g.setColor(theme.getIntProperty("border.color"));
		}
		g.drawRoundRect(2,2,width-4,height-4,6,6);
	}
	
	private void paintText(Graphics g)
	{
		if(formatedText==null)
		{
			int[] ps = getPrefSize();
			if(ps==null) ps = getMinSize();
			formatedText = StringUtil.format(value,font,ps[0],ps[1]);
		}
		// create a bordered area with the text inside.
		int valign = getValign();
		int halign = getHalign();
		
		Theme theme = FireScreen.getTheme();
		int width = getWidth();
		int height = getHeight();
		g.setFont(font);