/**
* Paint a background for all groups and a round blue border and background when a cell is
* selected.
*
* @param g the <tt>Graphics</tt> object
*/
private void internalPaintComponent(Graphics g) {
AntialiasingManager.activateAntialiasing(g);
Graphics2D g2 = (Graphics2D) g;
if (isSelected) {
g2.setColor(selectedColor);
g2.fillRect(0, 0, this.getWidth(), this.getHeight());
}
}
/**
* Paints a customized background.
*
* @param g the <tt>Graphics</tt> object through which we paint
*/
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
g = g.create();
if (!(treeNode instanceof GroupNode) && !isSelected) return;
AntialiasingManager.activateAntialiasing(g);
Graphics2D g2 = (Graphics2D) g;
try {
internalPaintComponent(g2);
} finally {
g.dispose();
}
}
/**
* Draw the icon at the specified location. Paints this component as an icon.
*
* @param c the component which can be used as observer
* @param g the <tt>Graphics</tt> object used for painting
* @param x the position on the X coordinate
* @param y the position on the Y coordinate
*/
public void paintIcon(Component c, Graphics g, int x, int y) {
g = g.create();
try {
Graphics2D g2 = (Graphics2D) g;
AntialiasingManager.activateAntialiasing(g2);
g2.setColor(Color.WHITE);
g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.8f));
g2.fillRoundRect(x, y, getIconWidth() - 1, getIconHeight() - 1, 10, 10);
g2.setColor(Color.DARK_GRAY);
g2.drawRoundRect(x, y, getIconWidth() - 1, getIconHeight() - 1, 10, 10);
// Indent component content from the border.
g2.translate(x + 5, y + 5);
super.paint(g2);
g2.translate(x, y);
} finally {
g.dispose();
}
}