showsyscodeitem.java

PDA餐饮管理系统,在掌上电脑实现的,可以开台,点菜等多功能模块

package item;

import javax.microedition.lcdui.*;
import javax.microedition.rms.RecordComparator;
import javax.microedition.rms.RecordEnumeration;
import javax.microedition.rms.RecordStore;

import rms.*;

/**
 * 用于显示系统编码信息列表的控件
 * @author hong
 *
 */
public class ShowSyscodeItem extends GridItem 
implements RecordComparator{
	
	private Syscode aSyscode; 
	public ShowSyscodeItem(String title,int itemWidth,int itemHeight,String rmsName) {
		super(title,itemWidth,itemHeight,200,20,20);
		RecordStore rs;
		RecordEnumeration re;
		rs = RMSUtil.openRSAnymay(rmsName);
		if (rs != null) {
			try {
				re = rs.enumerateRecords(null, this, false);
				while (re.hasNextElement()) {
					byte[] tmp = re.nextRecord();
					aSyscode=Syscode.decode(tmp);
					this.addContent(aSyscode);
				}
				re.destroy();
				rs.closeRecordStore();
			} catch (Exception e) {

			}
		}
	}

	protected void drawBottom(Graphics g) {
		g.drawString((curPage+1)+"/"+pages,3,rows*dy+2,20);
	}

	protected void drawContent(Graphics g, int x, int y) {
		g.drawLine(dx * x+30,dy*y,dx * x+30,dy*y+dy);
		aSyscode=(Syscode)(cur_content[x][y]);
		if (aSyscode!=null){
		g.drawString(aSyscode.getId(), dx * x + 3, dy * y+ 1, 20);
		g.drawString(aSyscode.getName(), dx * x + 33, dy * y+ 1, 20);
		}
	}
	
	public int compare(byte[] record1, byte[] record2) {
		try {
			Syscode s1 = Syscode.decode(record1);
			Syscode s2 = Syscode.decode(record2);
			int id1 = Integer.parseInt(s1.getId());
			int id2 = Integer.parseInt(s2.getId());
			if (id1 > id2) {
				return RecordComparator.FOLLOWS;
			} else if (id1 < id2) {
				return RecordComparator.PRECEDES;
			} else
				return RecordComparator.EQUIVALENT;
		} catch (Exception e) {
		}
		return 0;
	}
}