fontchooser.java

JavaExplorer是一个独立于平台的浏览器

/**
  * File and FTP Explorer
  * Copyright 2003
  * BOESCH Vincent
  *
  * 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 (at your option) 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 javaexplorer.gui.dialog;

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;
import javax.swing.text.*;


public class FontChooser extends JDialog implements ActionListener {
    static Font[] tb_f;

    static {
        tb_f = GraphicsEnvironment.getLocalGraphicsEnvironment().getAllFonts();
    }

    JComboBox fontName;
    JCheckBox fontBold;
    JCheckBox fontItalic;
    JTextField fontSize;
    JLabel previewLabel;
    SimpleAttributeSet attributes;
    Font newFont;
    Color newColor;

    public FontChooser(Frame parent, Font oldFont) {
        super(parent, "Font Chooser", true);
        setSize(500, 160);
        attributes = new SimpleAttributeSet();

        // make sure that any way they cancel the window does the right thing
        addWindowListener(new WindowAdapter() {
                public void windowClosing(WindowEvent e) {
                    closeAndCancel();
                }
            });

        // Start the long process of setting up our interface
        Container c = getContentPane();
        int indexSelected = 1;
        JPanel fontPanel = new JPanel();
        fontName = new JComboBox();

        for (int i = 0; i < tb_f.length; i++) {
            fontName.addItem(tb_f[i].getName());

            if ((oldFont != null) &&
                    tb_f[i].getName().equals(oldFont.getName())) {
                indexSelected = i;
            }
        }

        fontName.setSelectedIndex(indexSelected);
        fontName.addActionListener(this);
        fontSize = new JTextField((oldFont == null) ? "12"
                                                    : ("" + oldFont.getSize()),
                4);
        fontSize.setHorizontalAlignment(SwingConstants.RIGHT);
        fontSize.addActionListener(this);
        fontBold = new JCheckBox("Bold");
        fontBold.setSelected((oldFont == null) ? false : oldFont.isBold());
        fontBold.addActionListener(this);
        fontItalic = new JCheckBox("Italic");
        fontItalic.setSelected((oldFont == null) ? false : oldFont.isItalic());
        fontItalic.addActionListener(this);

        fontPanel.add(fontName);
        fontPanel.add(new JLabel(" Size: "));
        fontPanel.add(fontSize);
        fontPanel.add(fontBold);
        fontPanel.add(fontItalic);

        c.add(fontPanel, BorderLayout.NORTH);

        JPanel previewPanel = new JPanel(new BorderLayout());
        previewLabel = new JLabel("Here's a sample of this font.");
        previewPanel.add(previewLabel, BorderLayout.CENTER);
        previewLabel.setFont(oldFont);

        // Add in the Ok and Cancel buttons for our dialog box
        JButton okButton = new JButton("Ok");
        okButton.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent ae) {
                    closeAndSave();
                }
            });

        JButton cancelButton = new JButton("Cancel");
        cancelButton.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent ae) {
                    closeAndCancel();
                }
            });

        JPanel controlPanel = new JPanel();
        controlPanel.add(okButton);
        controlPanel.add(cancelButton);
        previewPanel.add(controlPanel, BorderLayout.SOUTH);

        // Give the preview label room to grow.
        previewPanel.setMinimumSize(new Dimension(100, 100));
        previewPanel.setPreferredSize(new Dimension(100, 100));

        c.add(previewPanel, BorderLayout.SOUTH);
    }

    // Ok, something in the font changed, so figure that out and make a
    // new font for the preview label
    public void actionPerformed(ActionEvent ae) {
        // Check the name of the font
        if (!StyleConstants.getFontFamily(attributes).equals(fontName.getSelectedItem())) {
            StyleConstants.setFontFamily(attributes,
                (String) fontName.getSelectedItem());
        }

        // Check the font size (no error checking yet)
        if (StyleConstants.getFontSize(attributes) != Integer.parseInt(
                    fontSize.getText())) {
            StyleConstants.setFontSize(attributes,
                Integer.parseInt(fontSize.getText()));
        }

        // Check to see if the font should be bold
        if (StyleConstants.isBold(attributes) != fontBold.isSelected()) {
            StyleConstants.setBold(attributes, fontBold.isSelected());
        }

        // Check to see if the font should be italic
        if (StyleConstants.isItalic(attributes) != fontItalic.isSelected()) {
            StyleConstants.setItalic(attributes, fontItalic.isSelected());
        }

        // and update our preview label
        updatePreviewFont();
    }

    // Get the appropriate font from our attributes object and update
    // the preview label
    protected void updatePreviewFont() {
        String name = StyleConstants.getFontFamily(attributes);
        boolean bold = StyleConstants.isBold(attributes);
        boolean ital = StyleConstants.isItalic(attributes);
        int size = StyleConstants.getFontSize(attributes);

        //Bold and italic don't work properly in beta 4.
        Font f = new Font(name,
                (bold ? Font.BOLD : 0) + (ital ? Font.ITALIC : 0), size);
        previewLabel.setFont(f);
    }

    // Get the appropriate color from our chooser and update previewLabel
    public Font getNewFont() {
        return newFont;
    }

    public void closeAndSave() {
        // save font & color information
        newFont = previewLabel.getFont();

        // and then close the window
        setVisible(false);
    }

    public void closeAndCancel() {
        // erase any font information and then close the window
        newFont = null;
        setVisible(false);
    }

    /*  public static void main( String argv[] ){
        JFrame jf = new JFrame();
        jf.setBounds(100, 100, 300, 300);
        jf.setVisible(true);
        FontChooser fc = new FontChooser( jf, null );
        fc.setVisible(true);
      }
    */
}