@SuppressWarnings("unchecked")
static <C extends JComponent & BackgroundPaintable> void paintBackground(C comp, Graphics2D g) {
// we should be painting the background behind the painter if we have one
// this prevents issues with buffer reuse where visual artifacts sneak in
if (comp.isOpaque()
|| (comp instanceof AlphaPaintable && ((AlphaPaintable) comp).getAlpha() < 1f)
|| UIManager.getLookAndFeel().getID().equals("Nimbus")) {
g.setColor(comp.getBackground());
g.fillRect(0, 0, comp.getWidth(), comp.getHeight());
}
Painter<? super C> painter = comp.getBackgroundPainter();
if (painter != null) {
if (comp.isPaintBorderInsets()) {
painter.paint(g, comp, comp.getWidth(), comp.getHeight());
} else {
Insets insets = comp.getInsets();
g.translate(insets.left, insets.top);
painter.paint(
g,
comp,
comp.getWidth() - insets.left - insets.right,
comp.getHeight() - insets.top - insets.bottom);
g.translate(-insets.left, -insets.top);
}
}
}
public static <C extends Component> C findLargestComponent(Collection<C> components) {
int largestArea = -1;
C largestComponent = null;
for (C c : components) {
int area = c.getWidth() * c.getHeight();
if (area > largestArea) {
largestComponent = c;
largestArea = area;
}
}
return largestComponent;
}
