createcomponentcommand.java

基于eclipse的工具开发代码

package com.cownew.uidesigner.commands;

import org.eclipse.gef.commands.Command;

import com.cownew.uidesigner.common.ComponentIdManager;
import com.cownew.uidesigner.model.Component;
import com.cownew.uidesigner.model.Form;

public class CreateComponentCommand extends Command
{

	private Form form;

	private Component component;

	public CreateComponentCommand(Form form, Component component)
	{
		super();
		this.form = form;
		this.component = component;

	}

	public String getLabel()
	{
		return "Create Node";
	}

	public void execute()
	{
		this.component.setForm(form);
		// 自动生成控件id
		ComponentIdManager mgr = new ComponentIdManager(form);
		String id = mgr.generateId(component);
		component.setId(id);

		form.addComponent(component);
	}

	public void undo()
	{
		form.removeComponent(component);
	}

	public void redo()
	{
		execute();
	}
}