com.darwinsys.swingui.FontChooser Maven / Gradle / Ivy
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package com.darwinsys.swingui;
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.GraphicsEnvironment;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.border.EtchedBorder;
import javax.swing.border.TitledBorder;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
/** A Swing-based Font Selection JDialog, to be created and
* setVisible(true) in the usual way.
*
* Uses Listeners to ensure that Preview button isn't actually needed
* @author Ian Darwin
*/
// BEGIN main
// package com.darwinsys.swingui;
public class FontChooser extends JDialog {
private static final long serialVersionUID = 5363471384675038069L;
public static final String DEFAULT_TEXT = "Lorem ipsem dolor";
// Results:
/** The font the user has chosen */
protected Font resultFont = new Font("Serif", Font.PLAIN, 12);
/** The resulting font name */
protected String resultName;
/** The resulting font size */
protected int resultSize;
/** The resulting boldness */
protected boolean isBold;
/** The resulting italicness */
protected boolean isItalic;
// Working fields
/** Display text */
protected String displayText = DEFAULT_TEXT;
/** The font name chooser */
protected JList fontNameChoice;
/** The font size chooser */
protected JList fontSizeChoice;
/** The bold and italic choosers */
JCheckBox bold, italic;
/** The list of font sizes */
protected Integer fontSizes[] = {
8, 9, 10, 11, 12, 14, 16, 18, 20, 24, 30, 36, 40, 48, 60, 72
};
/** The index of the default size (e.g., 14 point == 4) */
protected static final int DEFAULT_SIZE = 4;
/** The font display area.
*/
protected JLabel previewArea;
/** Construct a FontChooser -- Sets title and gets
* array of fonts on the system. Builds a GUI to let
* the user choose one font at one size.
*/
public FontChooser(JFrame f) {
super(f, "Font Chooser", true);
Container cp = getContentPane();
JPanel top = new JPanel();
top.setBorder(new TitledBorder(new EtchedBorder(), "Font"));
top.setLayout(new FlowLayout());
// This gives a longish list; most of the names that come
// with your OS (e.g., Helvetica, Times), plus the Sun/Java ones (Lucida,
// Lucida Bright, Lucida Sans...)
String[] fontList = GraphicsEnvironment.getLocalGraphicsEnvironment().
getAvailableFontFamilyNames();
fontNameChoice = new JList(fontList);
top.add(new JScrollPane(fontNameChoice));
fontNameChoice.setVisibleRowCount(fontSizes.length);
fontNameChoice.setSelectedValue("Serif", true);
fontSizeChoice = new JList(fontSizes);
top.add(fontSizeChoice);
fontSizeChoice.setSelectedIndex(fontSizes.length * 3 / 4);
cp.add(top, BorderLayout.NORTH);
JPanel attrs = new JPanel();
top.add(attrs);
attrs.setLayout(new GridLayout(0,1));
attrs.add(bold =new JCheckBox("Bold", false));
attrs.add(italic=new JCheckBox("Italic", false));
// Make sure that any change to the GUI will trigger a font preview.
ListSelectionListener waker = new ListSelectionListener() {
public void valueChanged(ListSelectionEvent e) {
previewFont();
}
};
fontSizeChoice.addListSelectionListener(waker);
fontNameChoice.addListSelectionListener(waker);
ItemListener waker2 = new ItemListener() {
public void itemStateChanged(ItemEvent e) {
previewFont();
}
};
bold.addItemListener(waker2);
italic.addItemListener(waker2);
previewArea = new JLabel(displayText, JLabel.CENTER);
previewArea.setSize(200, 50);
cp.add(previewArea, BorderLayout.CENTER);
JPanel bot = new JPanel();
JButton okButton = new JButton("Apply");
bot.add(okButton);
okButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
previewFont();
dispose();
setVisible(false);
}
});
JButton canButton = new JButton("Cancel");
bot.add(canButton);
canButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
// Set all values to null. Better: restore previous.
resultFont = null;
resultName = null;
resultSize = 0;
isBold = false;
isItalic = false;
dispose();
setVisible(false);
}
});
cp.add(bot, BorderLayout.SOUTH);
previewFont(); // ensure view is up to date!
pack();
setLocation(100, 100);
}
/** Called from the action handlers to get the font info,
* build a font, and set it.
*/
protected void previewFont() {
resultName = (String)fontNameChoice.getSelectedValue();
String resultSizeName = fontSizeChoice.getSelectedValue().toString();
int resultSize = Integer.parseInt(resultSizeName);
isBold = bold.isSelected();
isItalic = italic.isSelected();
int attrs = Font.PLAIN;
if (isBold) attrs = Font.BOLD;
if (isItalic) attrs |= Font.ITALIC;
resultFont = new Font(resultName, attrs, resultSize);
// System.out.println("resultName = " + resultName + "; " +
// "resultFont = " + resultFont);
previewArea.setFont(resultFont);
pack(); // ensure Dialog is big enough.
}
/** Retrieve the selected font name. */
public String getSelectedName() {
return resultName;
}
/** Retrieve the selected size */
public int getSelectedSize() {
return resultSize;
}
/** Retrieve the selected font, or null */
public Font getSelectedFont() {
return resultFont;
}
public String getDisplayText() {
return displayText;
}
public void setDisplayText(String displayText) {
this.displayText = displayText;
previewArea.setText(displayText);
previewFont();
}
public JList getFontNameChoice() {
return fontNameChoice;
}
public JList getFontSizeChoice() {
return fontSizeChoice;
}
public boolean isBold() {
return isBold;
}
public boolean isItalic() {
return isItalic;
}
}
// END main