characterrenderer.java

全面实现ilog地功能,没有使用第三方lib.

/*
 * This source code is part of TWaver 1.3.1
 *
 * SERVA Software PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 * Copyright 2000-2005 SERVA Software, Inc. All rights reserved.
 */

package demo.sheet.customsheet;

import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;

import javax.swing.JComponent;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.border.Border;
import javax.swing.border.EmptyBorder;
import javax.swing.table.TableCellRenderer;

import twaver.TWaverUtil;

public class CharacterRenderer extends JComponent implements TableCellRenderer{
	
	protected static Border noFocusBorder = new EmptyBorder(1, 1, 1, 1); 
	protected static Border focusBorder = UIManager.getBorder("Table.focusCellHighlightBorder");
	
	private boolean hasFocus;
	private String text;
	private Color color;
	
    public void paintComponent(Graphics g) {
    	super.paintComponent(g);
    	
    	if(hasFocus){
    		this.setBorder(focusBorder);
    	}else{
    		this.setBorder(noFocusBorder);
    	}
    	Dimension size = this.getSize();
    	Graphics2D g2 = (Graphics2D) g;
    	
    	// fill background
    	g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        GradientPaint gp = new GradientPaint(0, 0, color, size.width / 2, 0, Color.white, true);
        g2.setPaint(gp);
        g2.fillRect(0, 0, size.width, size.height);
    	
        // draw text
        g2.setColor(Color.BLACK);
        Font font = TWaverUtil.getFont(Font.PLAIN, 12);
        g2.setFont(font);
    	Dimension textSize = TWaverUtil.getTextSize(text, font, g2);
    	int x = (size.width - textSize.width)/ 2;
    	int y = TWaverUtil.getTextOffset(text, font, g2);
    	g2.drawString(text, x, y);
    }
    
	public Component getTableCellRendererComponent(JTable table, Object value, 
			boolean isSelected, boolean hasFocus, int row, int column) {
		this.hasFocus = hasFocus;
    	if(value instanceof Character){
    		int c = ((Character)value).charValue() - 'A';
    	    c = (c+2) * 666;
    		color = new Color(c % 180, c % 150, c % 200);
    		text = "<" + value.toString() + ">";
    	}else{
    		color = Color.white;
    		text = "";
    	}
    	this.setToolTipText(value + "");
		return this;
	}

}