backgrounddialog.java

具有不同语法高亮的编辑器实例

/*
 * 11/14/2003
 *
 * BackgroundDialog.java - Dialog allowing you to change the background
 * of RTextAreas.
 * Copyright (C) 2003 Robert Futrell
 * [e-mail]
 * www.website.com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
package org.fife.ui.rtextarea;

import java.awt.Color;
import java.awt.Component;
import java.awt.Dialog;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import java.awt.Image;
import java.awt.Insets;
import java.awt.image.BufferedImage;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.net.URL;
import javax.imageio.ImageIO;
import java.util.ResourceBundle;
import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.ButtonGroup;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JColorChooser;
import javax.swing.JDialog;
import javax.swing.JFileChooser;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JSeparator;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.border.Border;

import org.fife.RUtilities;
import org.fife.ui.ImagePreviewPane;
import org.fife.ui.RButton;
import org.fife.ui.RFileChooser;
import org.fife.ui.UIUtilities;
import org.fife.ui.rtextfilechooser.filters.ImageFileFilter;


/**
 * Dialog allowing the user to select the background to use for an
 * <code>RTextArea</code>.
 *
 * @author Robert Futrell
 * @version 1.0
 */
class BackgroundDialog extends JDialog implements ActionListener {

	/**
	 * 
	 */
	private static final long serialVersionUID = 1384333147126605631L;

	private JRadioButton colorButton;
	private JRadioButton imageButton;
	private JButton colorBrowseButton;
	private JButton imageBrowseButton;
	private JButton okButton;
	private JButton cancelButton;

	private Color currentColor;
	private String currentImageFileName;
	private JTextField imageFileNameField;
	private boolean viewingColors;
	private Image previewImage;

	private ResourceBundle msg;

	private JFileChooser imageChooser;


/*****************************************************************************/


	/**
	 * Creates and initializes a <code>BackgroundDialog</code>.
	 *
	 * @param owner The owner of this dialog.
	 */
	public BackgroundDialog(Dialog owner) {

		// Call parent's constructor and set the dialog's title.
		super(owner);
		msg = ResourceBundle.getBundle(
							"org.fife.ui.rtextarea.BackgroundDialog");
		setTitle(msg.getString("BackgroundDialogTitle"));

		Border empty5Border = UIUtilities.getEmpty5Border();

		// Initialize the image chooser.
		imageChooser = new RFileChooser();
		ImagePreviewPane imagePreviewPane = new ImagePreviewPane();
		imageChooser.setAccessory(imagePreviewPane);
		imageChooser.addPropertyChangeListener(imagePreviewPane);
		imageChooser.setFileFilter(new ImageFileFilter());

		// Create a panel showing a "background preview."
		JPanel previewPanel = new JPanel();
		previewPanel.setLayout(new BoxLayout(previewPanel, BoxLayout.Y_AXIS));
		previewPanel.setBorder(BorderFactory.createTitledBorder(
									msg.getString("PreviewLabel")));
		previewPanel.add(Box.createRigidArea(new Dimension(90,90)));

		// Create a panel allowing you to go to the color picker or image
		// selector to change the background.
		JPanel changePanel = new JPanel();
		GridBagLayout gridbag = new GridBagLayout();
		changePanel.setLayout(gridbag);
		GridBagConstraints c = new GridBagConstraints();
		c.fill = GridBagConstraints.BOTH;
		changePanel.setBorder(empty5Border);

		colorButton = new JRadioButton(msg.getString("Color"), true);
		colorButton.setActionCommand("PressedColorRadioButton");
		colorButton.addActionListener(this);
		c.gridx = 0; c.gridy = 0;
		gridbag.setConstraints(colorButton, c);
		changePanel.add(colorButton);

		colorBrowseButton = new RButton(msg.getString("BrowseColors"));
		colorBrowseButton.setActionCommand("BrowseColors");
		colorBrowseButton.addActionListener(this);
		colorBrowseButton.setEnabled(true);
		c.gridx = 1; c.gridy = 0;
		gridbag.setConstraints(colorBrowseButton, c);
		changePanel.add(colorBrowseButton);

		Component rigidArea = Box.createRigidArea(new Dimension(5,5));
		c.gridx = 0; c.gridy = 1;
		c.gridwidth = 2;
		gridbag.setConstraints(rigidArea, c);
		changePanel.add(rigidArea);
		c.gridwidth = 1;

		imageButton = new JRadioButton(msg.getString("Image"), false);
		imageButton.setActionCommand("PressedImageRadioButton");
		imageButton.addActionListener(this);
		c.gridx = 0; c.gridy = 2;
		gridbag.setConstraints(imageButton, c);
		changePanel.add(imageButton);

		imageBrowseButton = new RButton(msg.getString("BrowseImages"));
		imageBrowseButton.setActionCommand("BrowseImages");
		imageBrowseButton.addActionListener(this);
		imageBrowseButton.setEnabled(false);
		c.gridx = 1; c.gridy = 2;
		gridbag.setConstraints(imageBrowseButton, c);
		changePanel.add(imageBrowseButton);

		Component rigidArea2 = Box.createRigidArea(new Dimension(5,10));
		c.gridx = 0; c.gridy = 3;
		c.gridwidth = 2;
		gridbag.setConstraints(rigidArea2, c);
		changePanel.add(rigidArea2);
		c.gridwidth = 1;

		imageFileNameField = new JTextField("", 10);
		c.gridx = 0; c.gridy = 4;
		c.gridwidth = 2;
		gridbag.setConstraints(imageFileNameField, c);
		imageFileNameField.setEnabled(false);
		changePanel.add(imageFileNameField);

		ButtonGroup buttonGroup = new ButtonGroup();
		buttonGroup.add(colorButton);
		buttonGroup.add(imageButton);

		// Create a panel combining the first two.
		JPanel topPanel = new JPanel();
		topPanel.setBorder(BorderFactory.createEmptyBorder(0,0,5,0));
		topPanel.add(previewPanel);
		topPanel.add(changePanel);

		// Create a panel for the OK and Cancel buttons.
		okButton = RUtilities.createRButton(msg, "OK", "OKMnemonic");
		okButton.setActionCommand("BackgroundOK");
		okButton.addActionListener(this);
		cancelButton = RUtilities.createRButton(msg, "Cancel", "CancelMnemonic");
		cancelButton.setActionCommand("BackgroundCancel");
		cancelButton.addActionListener(this);
		JPanel buttonPanel = new JPanel();
		JPanel temp = new JPanel(new GridLayout(1,2, 5,0));
		temp.add(okButton);
		temp.add(cancelButton);
		buttonPanel.add(temp);

		// Arrange the dialog!
		JPanel contentPanel = new JPanel();
		contentPanel.setLayout(new BoxLayout(contentPanel, BoxLayout.Y_AXIS));
		contentPanel.setBorder(empty5Border);
		contentPanel.add(topPanel);
		contentPanel.add(new JSeparator());
		contentPanel.add(buttonPanel);
		setContentPane(contentPanel);

		// Get everything ready to go.
		getRootPane().setDefaultButton(okButton);
		setDefaultCloseOperation(JDialog.DO_NOTHING_ON_CLOSE);
		setResizable(false);
		setModal(true);	// So the user can't go back to the editor.
		setLocationRelativeTo(owner);
		pack();

	}


/*****************************************************************************/


	// Callback for when the user clicks a button, etc.
	public void actionPerformed(ActionEvent e) {

		String actionCommand = e.getActionCommand();

		if (actionCommand.equals("PressedColorRadioButton")) {
			colorBrowseButton.setEnabled(true);
			imageBrowseButton.setEnabled(false);
			viewingColors = true;
			okButton.setEnabled(true);