filesupport.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;
import java.io.*;

/**
* Support for properties of Color type.
* @author David Vivash
* @version 1.0, 26/02/01
*/
public class FileSupport extends ClassSupport implements ActionListener
{
	private File value				= null;
	private JButton browseButton	= null;
	private JTextField asText		= null;

	public FileSupport(Property property) {
		super(property);
		setLayout(new BorderLayout());

		value = (File)property.getValue();
		
		asText = new JTextField(""+value);
		asText.setEnabled(false); //don't allow the user to type in the filename for now
		
		browseButton = new JButton("...");
		browseButton.addActionListener(this);	
		browseButton.setPreferredSize(new Dimension(32,24));

		add(browseButton, BorderLayout.EAST);
		add(asText, BorderLayout.CENTER);
	}

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

	public Dimension getMinimumSize()	{ return new Dimension(10, 20); }
	public Dimension getPreferredSize()	{ return new Dimension(100, 20); }
	public Dimension getMaximumSize()	{ return new Dimension(10000, 20); }

	//---- PropertyChangeListener method -----
	public void actionPerformed(ActionEvent e) {
		FileDialog dialog = new FileDialog(new JFrame(), "Select Filename");
		dialog.setFile(asText.getText());
		dialog.show();		
		value = new File(dialog.getDirectory(), dialog.getFile());
		asText.setText(""+value);

		property.setValue(value);

	}
}