* Border border = comp.getBorder(); * Border margin = new EmptyBorder(10,10,10,10); * comp.setBorder(new CompoundBorder(border, margin)); **
* Warning:
* Serialized objects of this class will not be compatible with
* future Swing releases. The current serialization support is
* appropriate for short term storage or RMI between applications running
* the same version of Swing. As of 1.4, support for long term storage
* of all JavaBeans™
* has been added to the java.beans package.
* Please see {@link java.beans.XMLEncoder}.
*
* @author David Kloba
*/
@SuppressWarnings("serial")
public class CompoundBorder extends AbstractBorder {
/**
* The outside border.
*/
protected Border outsideBorder;
/**
* The inside border.
*/
protected Border insideBorder;
/**
* Creates a compound border with null outside and inside borders.
*/
public CompoundBorder() {
this.outsideBorder = null;
this.insideBorder = null;
}
/**
* Creates a compound border with the specified outside and
* inside borders. Either border may be null.
* @param outsideBorder the outside border
* @param insideBorder the inside border to be nested
*/
@ConstructorProperties({"outsideBorder", "insideBorder"})
public CompoundBorder(Border outsideBorder, Border insideBorder) {
this.outsideBorder = outsideBorder;
this.insideBorder = insideBorder;
}
/**
* Returns whether or not the compound border is opaque.
*
* @return {@code true} if the inside and outside borders
* are each either {@code null} or opaque;
* or {@code false} otherwise
*/
@Override
public boolean isBorderOpaque() {
return (outsideBorder == null || outsideBorder.isBorderOpaque()) &&
(insideBorder == null || insideBorder.isBorderOpaque());
}
/**
* Paints the compound border by painting the outside border
* with the specified position and size and then painting the
* inside border at the specified position and size offset by
* the insets of the outside border.
* @param c the component for which this border is being painted
* @param g the paint graphics
* @param x the x position of the painted border
* @param y the y position of the painted border
* @param width the width of the painted border
* @param height the height of the painted border
*/
public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {
Insets nextInsets;
int px, py, pw, ph;
px = x;
py = y;
pw = width;
ph = height;
if(outsideBorder != null) {
outsideBorder.paintBorder(c, g, px, py, pw, ph);
nextInsets = outsideBorder.getBorderInsets(c);
px += nextInsets.left;
py += nextInsets.top;
pw = pw - nextInsets.right - nextInsets.left;
ph = ph - nextInsets.bottom - nextInsets.top;
}
if(insideBorder != null)
insideBorder.paintBorder(c, g, px, py, pw, ph);
}
/**
* Reinitialize the insets parameter with this Border's current Insets.
* @param c the component for which this border insets value applies
* @param insets the object to be reinitialized
*/
public Insets getBorderInsets(Component c, Insets insets) {
Insets nextInsets;
insets.top = insets.left = insets.right = insets.bottom = 0;
if(outsideBorder != null) {
nextInsets = outsideBorder.getBorderInsets(c);
insets.top += nextInsets.top;
insets.left += nextInsets.left;
insets.right += nextInsets.right;
insets.bottom += nextInsets.bottom;
}
if(insideBorder != null) {
nextInsets = insideBorder.getBorderInsets(c);
insets.top += nextInsets.top;
insets.left += nextInsets.left;
insets.right += nextInsets.right;
insets.bottom += nextInsets.bottom;
}
return insets;
}
/**
* Returns the outside border object.
*
* @return the outside {@code Border} object
*/
public Border getOutsideBorder() {
return outsideBorder;
}
/**
* Returns the inside border object.
*
* @return the inside {@code Border} object
*/
public Border getInsideBorder() {
return insideBorder;
}
}