?? fontdialog.java
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/**
@version 1.32 2004-05-06
@author Cay Horstmann
*/
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class FontDialog
{
public static void main(String[] args)
{
FontDialogFrame frame = new FontDialogFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}
/**
A frame that uses a grid bag layout to arrange font
selection components.
*/
class FontDialogFrame extends JFrame
{
public FontDialogFrame()
{
setTitle("FontDialog");
setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
GridBagLayout layout = new GridBagLayout();
setLayout(layout);
ActionListener listener = new FontAction();
// construct components
JLabel faceLabel = new JLabel("Face: ");
face = new JComboBox(new String[]
{
"Serif", "SansSerif", "Monospaced",
"Dialog", "DialogInput"
});
face.addActionListener(listener);
JLabel sizeLabel = new JLabel("Size: ");
size = new JComboBox(new String[]
{
"8", "10", "12", "15", "18", "24", "36", "48"
});
size.addActionListener(listener);
bold = new JCheckBox("Bold");
bold.addActionListener(listener);
italic = new JCheckBox("Italic");
italic.addActionListener(listener);
sample = new JTextArea();
sample.setText("The quick brown fox jumps over the lazy dog");
sample.setEditable(false);
sample.setLineWrap(true);
sample.setBorder(BorderFactory.createEtchedBorder());
// add components to grid, using GBC convenience class
add(faceLabel, new GBC(0, 0).setAnchor(GBC.EAST));
add(face, new GBC(1, 0).setFill(GBC.HORIZONTAL).setWeight(100, 0).setInsets(1));
add(sizeLabel, new GBC(0, 1).setAnchor(GBC.EAST));
add(size, new GBC(1, 1).setFill(GBC.HORIZONTAL).setWeight(100, 0).setInsets(1));
add(bold, new GBC(0, 2, 2, 1).setAnchor(GBC.CENTER).setWeight(100, 100));
add(italic, new GBC(0, 3, 2, 1).setAnchor(GBC.CENTER).setWeight(100, 100));
add(sample, new GBC(2, 0, 1, 4).setFill(GBC.BOTH).setWeight(100, 100));
}
public static final int DEFAULT_WIDTH = 300;
public static final int DEFAULT_HEIGHT = 200;
private JComboBox face;
private JComboBox size;
private JCheckBox bold;
private JCheckBox italic;
private JTextArea sample;
/**
An action listener that changes the font of the
sample text.
*/
private class FontAction implements ActionListener
{
public void actionPerformed(ActionEvent event)
{
String fontFace = (String) face.getSelectedItem();
int fontStyle = (bold.isSelected() ? Font.BOLD : 0)
+ (italic.isSelected() ? Font.ITALIC : 0);
int fontSize = Integer.parseInt((String) size.getSelectedItem());
Font font = new Font(fontFace, fontStyle, fontSize);
sample.setFont(font);
sample.repaint();
}
}
}
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