ultimate chalenge in JComboBox
vaidhu
vaidhu wrote:
hi
how do I change the font of individual combo box items, say if I have 5
items in a combo box , how can I have each of them in a different font ? I
can do combo.setFont(Font f) but is there any way I can set the font of the
combo Items ?
Also,In my combobox i want to display more than one item of every font type.
I want the source code or logic.
Example:
items 1,2,3--"Arial"
items 4,5,6--"Times New Roman"
items 7,8,9--"verdana"
items 10,11,12--Again "Times New Roman"
Note:
using list cell renderer it is giving only one item of every font type.But i
want more than one item of every font in one combobox.
This is my code which need changes
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.plaf.basic.*;
public class ComboBoxFonts extends JFrame implements ItemListener
{
// JTextArea textArea;
JComboBox comboBox;
public Font abiFont = new Font("Arial Black Italic",Font.PLAIN,20);
public Font bmoFont = new Font("Book Man Old Style Bold",Font.BOLD,20);
public Font cniFont = new Font("Courier New Italic",Font.PLAIN,20);
public Font tnrFont = new Font("Times New Roman",Font.PLAIN,20);
public Font verFont = new Font("Verdana Bold",Font.BOLD,20);
public Font webFont = new Font("Webdings",Font.BOLD,20);
public ComboBoxFonts()
{
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment ();
Font [] fonts = ge.getAllFonts ();
Font [] example = {abiFont,bmoFont,cniFont,tnrFont,verFont,webFont};
//The above example array contains the order in which the fonts are displayed
in our ComboBox.
comboBox = new JComboBox(example);
comboBox.setRenderer( new MyFontRenderer() );
comboBox.addItemListener( this );
getContentPane().add( comboBox, BorderLayout.NORTH );
comboBox.setBounds(162,42,180,25);
}
public void itemStateChanged(ItemEvent e)
{
Font font = (Font)e.getItem();
//textArea.setFont( font.deriveFont( textArea.getFont().getSize2D() ) );
comboBox.setFont( font.deriveFont( comboBox.getFont().getSize2D() ) );
}
public static void main(String[] args)
{
ComboBoxFonts frame = new ComboBoxFonts();
frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
frame.pack();
frame.setLocationRelativeTo( null );
frame.setVisible( true );
}
class MyFontRenderer extends BasicComboBoxRenderer
{
public Component getListCellRendererComponent(
JList list, Object value, int index, boolean isSelected, boolean cellHasFocus)
{
super.getListCellRendererComponent(list, value, index, isSelected,
cellHasFocus);
Font font = (Font)value;
String fontName = font.getFontName();
//setFont( font.deriveFont(12.0f) );
int size = font.getSize();
System.out.println("fontName : "+fontName+" size : "+size);
if(fontName.equals("Arial Black Italic"))
{
setFont( font.deriveFont(100));
setText(""+(char)69+""+(char)78+""+(char)71+""+(ch ar)76+""+(char)73+""+(char)
83+""+(char)72);
//setText("Welcome To Geneva Software Technologies Pvt ltd");
return this;
}
else if(fontName.equals("Times New Roman"))
{
setFont( font.deriveFont(100));
setText(""+(char)69+""+(char)78+""+(char)71+""+(ch ar)76+""+(char)73+""+(char)
83+""+(char)72);
setText(""+(char)99+""+(char)117+""+(char)104+""+( char)122+""+(char)77+""+
(char)73+""+(char)102);
return this;
}
else if(fontName.equals("Webdings"))
{
//Webdings font is the last font displayed in our ComboBox drop down list
setFont( font.deriveFont(100));
setText(""+(char)69+""+(char)78+""+(char)71+""+(ch ar)76+""+(char)73+""+(char)
83+""+(char)72);
return this;
}
else if(fontName.equals("Verdana Bold"))
{
setFont( font.deriveFont(100));
setText(""+(char)69+""+(char)78+""+(char)71+""+(ch ar)76+""+(char)73+""+(char)
83+""+(char)72);
return this;
}
else if(fontName.equals("Book Man Old Style Bold"))
{
setFont( font.deriveFont(100));
setText(""+(char)69+""+(char)78+""+(char)71+""+(ch ar)76+""+(char)73+""+(char)
83+""+(char)72);
return this;
}
else
{
setFont(font.deriveFont(100));
setText(""+(char)69+""+(char)78+""+(char)71+""+(ch ar)76+""+(char)73+""+(char)
83+""+(char)72);
return this;
}
}
}
}
--
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John B. Matthews
[...]
> how do I change the font of individual combo box items, say if I have
> 5 items in a combo box , how can I have each of them in a different
> font ? I can do combo.setFont(Font f) but is there any way I can set
> the font of the combo Items ?
>
> Also,In my combobox i want to display more than one item of every
> font type. I want the source code or logic.
[...]
You might look at this:
<http://java.sun.com/docs/books/tutorial/uiswing/components/combobox.html#renderer>
Let MyFontRenderer extend JLabel and implement ListCellRenderer.
Let it contain sufficient data to map the item index to your
desired font. Set the desired font in getListCellRendererComponent().
--
John B. Matthews
trashgod at gmail dot com
home dot woh dot rr dot com slash jbmatthews
John B. Matthews
In article <nospam-27FA94....@aioe.org>,
"John B. Matthews" <nos...@nospam.invalid> wrote:
> In article <890abd332fe0a@uwe>, "vaidhu" <u45630@uwe> wrote:
>
> [...]
> > how do I change the font of individual combo box items, say if I
> > have 5 items in a combo box , how can I have each of them in a
> > different font ? I can do combo.setFont(Font f) but is there any
> > way I can set the font of the combo Items ?
> >
> > Also,In my combobox i want to display more than one item of every
> > font type. I want the source code or logic.
> [...]
>
> You might look at this:
<http://java.sun.com/docs/books/tutorial/uiswing/components/combobox.html#renderer>
> Let MyFontRenderer extend JLabel and implement ListCellRenderer. Let
> it contain sufficient data to map the item index to your desired
> font. Set the desired font in getListCellRendererComponent().
For example:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
/**
* @author John B. Matthews
*/
public class FontCombo extends JPanel {
private static Font dialog = new Font("Dialog", Font.PLAIN, 18);
private static Font mono = new Font("Monospaced", Font.PLAIN, 18);
private static Font sans = new Font("SansSerif", Font.PLAIN, 18);
private static Font serif = new Font("Serif", Font.PLAIN, 18);
private JComboBox choices;
public FontCombo() {
this.setLayout(new BorderLayout());
choices = new JComboBox();
choices.addItem(new FontComboItem("Dialog one", dialog));
choices.addItem(new FontComboItem("Dialog two", dialog));
choices.addItem(new FontComboItem("Monospaced", mono));
choices.addItem(new FontComboItem("SansSerif", sans));
choices.addItem(new FontComboItem("Serif one", serif));
choices.addItem(new FontComboItem("Serif two", serif));
choices.setRenderer(new FontCellRenderer());
choices.setSelectedIndex(2);
choices.setFont(mono);
choices.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
int index = choices.getSelectedIndex();
FontComboItem item =
(FontComboItem) choices.getItemAt(index);
choices.setFont(item.font);
}
});
this.add(choices, BorderLayout.CENTER);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationRelativeTo(null);
frame.add(new FontCombo());
frame.setSize(250, 125);
frame.setVisible(true);
}
});
}
}
class FontCellRenderer extends JLabel implements ListCellRenderer {
public FontCellRenderer() {
setOpaque(true);
}
public Component getListCellRendererComponent (
JList list, Object value, int index,
boolean isSelected, boolean cellHasFocus) {
FontComboItem item = (FontComboItem) value;
setText(item.text);
setFont(item.font);
setBackground(isSelected ? Color.gray : Color.white);
setForeground(isSelected ? Color.white : Color.black);
return this;
}
}
class FontComboItem {
public String text;
public Font font;
public FontComboItem(String text, Font font) {
this.text = text;
this.font = font;
}
}
--
John B. Matthews
trashgod at gmail dot com
home dot woh dot rr dot com slash jbmatthews
---
vaidhu
Thanks man.