A JLabel that can be underlined, implements Scrollable : Label « Swing Components « Java
A JLabel that can be underlined, implements Scrollable
/*
This library 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.
*/
import javax.swing.*;
import java.awt.*;
/**
A <tt>JLabel</tt> that can be underlined, implements <tt>Scrollable</tt>,
may have a tooltip text equal to its text and exposes a few convenience methods
for <tt>setText()</tt>.
@author <a href="mailto:jclasslib@ej-technologies.com">Ingo Kegel</a>
@version $Revision: 1.3 $ $Date: 2003/08/18 07:47:20 $
*/
public class ExtendedJLabel extends JLabel implements Scrollable {
private boolean underlined = false;
private boolean autoTooltip = false;
/**
Constructor.
*/
public ExtendedJLabel() {
}
/**
Constructor.
@param text the label text.
*/
public ExtendedJLabel(String text) {
super(text);
}
public Dimension getPreferredScrollableViewportSize() {
return getSize();
}
public int getScrollableBlockIncrement(Rectangle visibleRect, int orientation, int direction) {
return getWidth() / 10;
}
public boolean getScrollableTracksViewportWidth() {
return false;
}
public boolean getScrollableTracksViewportHeight() {
return false;
}
public int getScrollableUnitIncrement(Rectangle visibleRect, int orientation, int direction) {
return 10;
}
/**
Check whether this label is underlined.
@return underlined or not
*/
public boolean isUnderlined() {
return underlined;
}
/**
Set whether this label is underlined.
@param underlined underlined or not
*/
public void setUnderlined(boolean underlined) {
this.underlined = underlined;
repaint();
}
/**
Check whether the tooltip text is automatically equal
to the text of this label or not.
@return equal or not
*/
public boolean getAutoTooltip() {
return autoTooltip;
}
/**
Set whether the tooltip text is automatically equal
to the text of this label or not.
@param autoTooltip equal or not
*/
public void setAutoTooltip(boolean autoTooltip) {
this.autoTooltip = autoTooltip;
setToolTipText(getText());
}
public void setText(String text) {
super.setText(text);
if (autoTooltip) {
setToolTipText(text);
}
}
/**
Convenience method for calling <tt>setText()</tt> with a <tt>short</tt>.
@param number the <tt>short</tt>
*/
public void setText(short number) {
setText(String.valueOf(number));
}
/**
Convenience method for calling <tt>setText()</tt> with a <tt>int</tt>.
@param number the <tt>int</tt>
*/
public void setText(int number) {
setText(String.valueOf(number));
}
/**
Convenience method for calling <tt>setText()</tt> with a <tt>double</tt>.
@param number the <tt>double</tt>
*/
public void setText(double number) {
setText(String.valueOf(number));
}
/**
Convenience method for calling <tt>setText()</tt> with a <tt>float</tt>.
@param number the <tt>float</tt>
*/
public void setText(float number) {
setText(String.valueOf(number));
}
/**
Convenience method for calling <tt>setText()</tt> with a <tt>long</tt>.
@param number the <tt>long</tt>
*/
public void setText(long number) {
setText(String.valueOf(number));
}
public void paint(Graphics g) {
super.paint(g);
if (underlined) {
Insets i = getInsets();
FontMetrics fm = g.getFontMetrics();
Rectangle textRect = new Rectangle();
Rectangle viewRect = new Rectangle(i.left, i.top, getWidth() - (i.right + i.left), getHeight() - (i.bottom + i.top) );
SwingUtilities.layoutCompoundLabel(
this,
fm,
getText(),
getIcon(),
getVerticalAlignment(),
getHorizontalAlignment(),
getVerticalTextPosition(),
getHorizontalTextPosition(),
viewRect,
new Rectangle(),
textRect,
getText() == null ? 0 : ((Integer)UIManager.get("Button.textIconGap")).intValue()
);
int offset = 2;
if (UIManager.getLookAndFeel().isNativeLookAndFeel() && System.getProperty("os.name").startsWith("Windows")) {
offset = 1;
}
g.fillRect(textRect.x + ((Integer)UIManager.get("Button.textShiftOffset")).intValue() ,
textRect.y + fm.getAscent() + ((Integer)UIManager.get("Button.textShiftOffset")).intValue() + offset,
textRect.width,
1);
}
}
}
