alert.java

Eclipse RCP下编写的工作管理软件代码

package scheduler;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import net.sf.pim.URLUtil;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Monitor;
import org.eclipse.swt.widgets.Shell;

/**
 * alert window call by jcrontab
 * @author levin
 *
 */
public class Alert {
	
	//同类型提醒堆栈
	private static Map<String,Shell> old=new HashMap<String,Shell>();
	
	public static void main(final String[] args) {
		final Display display = Display.getDefault();
		if (display.getThread() != Thread.currentThread()) {
			display.asyncExec(new Runnable() {
				public void run() {
					show(display, args);
				}
			});
		} else {
			show(display, args);
		}
	}

	public static void show(final Display display, final String[] args) {
		final Shell shell = new Shell(display);
		//同一标题，只出现一个提醒
		if(old.get(args[0]) != null)
			old.get(args[0]).dispose();
		old.put(args[0], shell);
		
		shell.setMinimumSize(200, 90);
		shell.setText(args[0]);
		Image image = ImageDescriptor.createFromURL(
				URLUtil.getResourceURL("icons/alert.gif")).createImage(
				shell.getDisplay());
		shell.setImage(image);
		Monitor primary = display.getPrimaryMonitor();
		Rectangle bounds = primary.getBounds();
		Rectangle rect = shell.getBounds();
		int x = bounds.x + (bounds.width - rect.width) / 2;
		int y = bounds.y + (bounds.height - rect.height) / 2;
		shell.setLocation(x, y);

		GridLayout layout = new GridLayout();
		layout.numColumns = 2;
		shell.setLayout(layout);

		Label label = new Label(shell, SWT.NONE);
		label.setText(args[1]);
		GridData labelData = new GridData();
		labelData.horizontalAlignment = GridData.FILL;
		labelData.grabExcessHorizontalSpace = true;
		labelData.horizontalSpan=2;
		label.setLayoutData(labelData);

		
		Button ok = new Button(shell, SWT.PUSH);
		ok.setText("知道了!");
		ok.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				shell.dispose();
			}
		});
		GridData okData = new GridData();
		okData.horizontalAlignment = GridData.FILL;
		okData.grabExcessHorizontalSpace = true;
		if(args.length == 2)
			okData.horizontalSpan =2;
		ok.setLayoutData(okData);
		//设置缺省按钮
		shell.setDefaultButton(ok);

		//三个参数，再增加一个邮件的按钮
		if(args.length == 3){
			Button mail=new Button(shell,SWT.PUSH);
			mail.setText("查看邮件...");
			mail.addSelectionListener(new SelectionAdapter() {
				public void widgetSelected(SelectionEvent e) {
					shell.dispose();
					try {
						Runtime.getRuntime().exec(args[2]);
					} catch (IOException e1) {
						e1.printStackTrace();
					}
				}
			});
			GridData mailData = new GridData();
			mailData.horizontalAlignment = GridData.FILL;
			mailData.grabExcessHorizontalSpace = true;
			mail.setLayoutData(mailData);
		}
		
		// shell.setDefaultButton(ok);
		shell.setFocus();
		shell.pack();
		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
//		display.dispose();
	}
}