boolsupport.java

PIY(Program It Yourself)是一个基于Java的应用程序开发环境

package piy.support;

import java.awt.event.*;
import java.awt.*;
import piy.*;
import javax.swing.*;
import java.awt.Dimension;

/**
* Support for properties of boolean type.
* @author David Vivash
* @version 1.0, 08/02/01
*/
public class BoolSupport extends ClassSupport implements ActionListener
{
	private boolean value = true;
	private JRadioButton yes, no;

	public BoolSupport(Property property) {
		super(property);
	
		//Make sure everything is correctly typed
		if ((property.getValue() == null) || (property.getType() != boolean.class)
								|| (property.getValue().getClass() != Boolean.class))
			property.setValue(new Boolean(false));

		//Make sure the variable with this as a property type is primitive		
		if (property.getHolder().getClass() == Variable.class)
			((Variable)property.getHolder()).setType(boolean.class);

		//Get the value stored in the property
		value = ((Boolean)property.getValue()).booleanValue();

		setLayout(new FlowLayout());

		yes = new JRadioButton("Yes");
		no = new JRadioButton("No");

		ButtonGroup choice = new ButtonGroup();
		choice.add(yes);
		choice.add(no);

		add(yes);
		add(no);

		yes.setSelected(value);
		no.setSelected(!value);

		yes.addActionListener(this);
		no.addActionListener(this);
	}

	public void actionPerformed(ActionEvent e) {
		ProjectHandler.getInstance().projectChanged();
		property.setValue(new Boolean(yes.isSelected()));
	}

	public static Class getSupportedClass() { return boolean.class; }

	public Dimension getMinimumSize() { return new Dimension(10, 24); }
	public Dimension getPreferredSize() { return new Dimension(100, 24); }
	public Dimension getMaximumSize() { return new Dimension(10000, 24); }

	
	
}