helpaction.java

Eclipse RCP下编写的工作管理软件代码

package net.sf.pim.mail;

import java.net.URL;

import org.eclipse.core.runtime.FileLocator;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Platform;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.swt.SWT;
import org.eclipse.swt.browser.Browser;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.IWorkbenchWindowActionDelegate;

/**
 * @author lzhang
 */
public class HelpAction implements IWorkbenchWindowActionDelegate {
	class HelpDialog extends MessageDialog {
	    public HelpDialog(Shell shell, String s, Image image, String s1, int i, String[] strings, int i1) {
	        super(shell, s, image, s1, i, strings, i1);
	    }
		@Override
		protected Point getInitialLocation(Point initialSize) {
			Point p=super.getInitialLocation(initialSize);
			//让弹出窗口在主窗口的下方，缺省在上方
			return new Point(p.x,p.y*2);
		}	    
	    protected Control createCustomArea(Composite composite) {
	    	Browser browser=new Browser(composite, SWT.WRAP | SWT.READ_ONLY);
	    	browser.setSize(620, 400);
			Menu menu = new Menu(browser.getShell(), SWT.POP_UP);
			browser.setMenu(menu);		
	    	URL helpfile = FileLocator.find(Platform.getBundle("net.sf.mywork.mail"), new Path("docs/manual.htm"), null);
			try {
				browser.setUrl(FileLocator.toFileURL(helpfile).getPath().substring(1));
			} catch (Exception e) {
				e.printStackTrace();
			}
			return browser;
	    }
	}

	private IWorkbenchWindow window;
	public void dispose() {
		
	}

	public void init(IWorkbenchWindow window) {
		this.window=window;
	}

	public void run(IAction action) {
      HelpDialog dialog =
      new HelpDialog(window.getShell(), "邮件帮助", null,
              "邮件客户端,欢迎使用\n [e-mail]  http://mywork.sf.net\n\n", MessageDialog.INFORMATION, new String[]{IDialogConstants.OK_LABEL}, 0);
      dialog.open();
	}

	public void selectionChanged(IAction action, ISelection selection) {
		
	}

}