enumgenitemdefwizardpage.java

基于eclipse的工具开发代码

package com.cownew.enumgenerator.wizards;

import java.util.HashSet;
import java.util.Set;

import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.layout.FormLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Text;

public class EnumGenItemDefWizardPage extends WizardPage
{

	private static final String LINESEPRATOR = System.getProperty("line.separator");
	private Text txtItem;
	public EnumGenItemDefWizardPage()
	{
		super("EnumGenItemDefWizardPage");
		setTitle("设定枚举项");
		setDescription("在此向导页中设定枚举类有哪些项");
	}

	public void createControl(Composite parent)
	{
		Composite container = new Composite(parent, SWT.NULL);
		FormLayout  layout = new FormLayout();
		container.setLayout(layout);
		
		FormData data = new FormData();
		data.top = new FormAttachment(0, 0);
        data.left = new FormAttachment(0, 0);
        data.right = new FormAttachment(100, 0);
        data.bottom = new FormAttachment(100, 0);
        
        
        txtItem = new Text(container,SWT.MULTI|SWT.WRAP|SWT.V_SCROLL);
        txtItem.setLayoutData(data);
        txtItem.addModifyListener(new ModifyListener(){

			public void modifyText(ModifyEvent e)
			{
				dialogChanged();				
			}
        	
        });
		setControl(container);
		dialogChanged();
	}
	
	public Set<String> getEnumItems()
	{
		Set<String> set = new HashSet<String>();
		String strItems = txtItem.getText();
		String[] itemArray = strItems.split(LINESEPRATOR);
		for (String item : itemArray)
		{
			set.add(item);
		}
		return set;
	}
	

	private void dialogChanged()
	{
		String strItems = txtItem.getText();
		
		if(strItems==null||strItems.trim().length()<=0)
		{
			updateStatus("请输入枚举项!");
			return;
		}
		
		String[] itemArray = strItems.split(LINESEPRATOR);
		Set<String> set = new HashSet<String>();
		for (String item : itemArray)
		{
			if(item==null||item.trim().length()<=0)
			{
				continue;
			}
			if(set.contains(item))
			{
				updateStatus("项重复:"+item);
				return;
			}
			updateStatus(null);
			set.add(item);
		}				
		
	}
	
	private void updateStatus(String message)
	{
		setErrorMessage(message);
		setPageComplete(message == null);		
		
	}
}