Setting font of JSlider

From:
Fred <fred.l.kleinschmidt@gmail.com>
Newsgroups:
comp.lang.java.gui
Date:
Wed, 16 Nov 2011 14:39:48 -0800 (PST)
Message-ID:
<84432b53-6264-4adc-82f6-632e19b7288b@m13g2000prl.googlegroups.com>
How do I set the font of a JSlider after it has been created, such
that its size is correct if it is the child of a JPanel used to
display a border ? (I use the JPanel for the border instead of
putting the border on the JPanel because using Nimbus L&F the
JSlider's border gets drawn inside the JSlider, clipping its contents)

I create a JSlider and a Hashtable for the tickmark labels, then
create the ticmark labels.

Then later I try to set the font.
If I just set the font on the jSlider, nothing happens. I have to set
the font on each of the labels for the font to change. But then the
jSlider's width is incorrect, clipping the labels.

Even if I do not use Nimbus, the problem occurs.

///// the code:

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.util.Dictionary;
import java.util.Enumeration;
import java.util.Hashtable;

import javax.swing.BorderFactory;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.SwingConstants;
import javax.swing.UIDefaults;
import javax.swing.border.Border;

/**
 * @author flk0018
 */
public class Test1 extends JPanel {

   JComponent panel;
   JSlider slider;
   Font f;

   public Test1() {
      slider = new JSlider( SwingConstants.VERTICAL );
      slider.setPaintTicks( true );
      slider.setPaintLabels( true );
      slider.setMajorTickSpacing( 20 );
      f = new Font( "Monospaced", Font.BOLD, 20 );
      slider.setFont( f );

      Hashtable <Integer, JLabel> labelTable = new Hashtable <Integer,
JLabel>();
      String smin = "10.000";
      JLabel lab;
      lab = new JLabel( smin );
      // lab.setFont( f ); // If done here, the size is correct
      labelTable.put( 0, lab );
      slider.setLabelTable( labelTable );

      panel = new JPanel();
      Border border = BorderFactory.createLineBorder( Color.black );
      panel.setBorder( border );
      panel.add( slider );
      add( panel );

      setComponentFont( f ); // if done here, labels are clipped
   }

   public void setComponentFont( Font font ) {
      Dimension d = panel.getPreferredSize();

      UIDefaults def = new UIDefaults();
      def.put( "font", font );

      //slider.setFont( font );
      Dictionary < ? , ? > labs = slider.getLabelTable();
      if ( labs != null ) {
         for ( Enumeration < ? > keys = labs.keys();
keys.hasMoreElements(); ) {
            Object key = keys.nextElement();
            JComponent label = (JComponent) labs.get( key );
            // label.putClientProperty( "Nimbus.Overrides",
def );
            //
label.putClientProperty( "Nimbus.Overrides.InheritDefaults", false );
            label.setFont( font );
            label.setPreferredSize( null );
            d = label.getPreferredSize();
            label.setSize( d );
         }
      }

      slider.setPreferredSize( null );
      d = slider.getPreferredSize();
      slider.setSize( d );

      panel.setPreferredSize( null );
      d = panel.getPreferredSize();
      panel.setSize( d );
   }

   protected static void createAndShowGUI() {
      Test1 t = new Test1();
      JFrame frame = new JFrame( "Test1" );
      frame.getContentPane().add( t );
      frame.pack();
      frame.setVisible( true );
   }

   public static void main( String[] args ) {
      // try {
      // for ( LookAndFeelInfo info :
UIManager.getInstalledLookAndFeels() ) {
      // if ( "Nimbus".equals( info.getName() ) ) {
      //
UIManager.setLookAndFeel( info.getClassName() );
      // break;
      // }
      // }
      // } catch ( Exception e ) {
      // System.out.println( "No nimbus found" );
      // }

      javax.swing.SwingUtilities.invokeLater( new Runnable() {
         public void run() {
            createAndShowGUI();
         }
      } );
   }
}

--
Fred K

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