/**
* Returns inner shade nine-patch icon.
*
* @param shadeWidth shade width
* @param round corners round
* @param shadeOpacity shade opacity
* @return inner shade nine-patch icon
*/
public static NinePatchIcon createInnerShadeIcon(
final int shadeWidth, final int round, final float shadeOpacity) {
// Calculating width for temprorary image
final int inner = Math.max(shadeWidth, round);
int width = shadeWidth * 2 + inner * 2;
// Creating template image
final BufferedImage bi = new BufferedImage(width, width, BufferedImage.TYPE_INT_ARGB);
final Graphics2D ig = bi.createGraphics();
GraphicsUtils.setupAntialias(ig);
final Area area = new Area(new Rectangle(0, 0, width, width));
area.exclusiveOr(
new Area(
new RoundRectangle2D.Double(
shadeWidth,
shadeWidth,
width - shadeWidth * 2,
width - shadeWidth * 2,
round * 2,
round * 2)));
ig.setPaint(Color.BLACK);
ig.fill(area);
ig.dispose();
// Creating shade image
final ShadowFilter sf = new ShadowFilter(shadeWidth, 0, 0, shadeOpacity);
final BufferedImage shade = sf.filter(bi, null);
// Clipping shade image
final Graphics2D g2d = shade.createGraphics();
GraphicsUtils.setupAntialias(g2d);
g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_IN));
g2d.setPaint(FlatLafStyleConstants.transparent);
g2d.fill(area);
g2d.dispose();
final BufferedImage croppedShade =
shade.getSubimage(shadeWidth, shadeWidth, width - shadeWidth * 2, width - shadeWidth * 2);
width = croppedShade.getWidth();
// Creating nine-patch icon
final NinePatchIcon ninePatchIcon = NinePatchIcon.create(croppedShade);
ninePatchIcon.addHorizontalStretch(0, inner, true);
ninePatchIcon.addHorizontalStretch(inner + 1, width - inner - 1, false);
ninePatchIcon.addHorizontalStretch(width - inner, width, true);
ninePatchIcon.addVerticalStretch(0, inner, true);
ninePatchIcon.addVerticalStretch(inner + 1, width - inner - 1, false);
ninePatchIcon.addVerticalStretch(width - inner, width, true);
ninePatchIcon.setMargin(shadeWidth);
return ninePatchIcon;
}
/**
* Adds horizontal stretch interval.
*
* @param start interval start
* @param end interval end
* @param pixel whether fixed interval or not
*/
public void addHorizontalStretch(final int start, final int end, final boolean pixel) {
addHorizontalStretch(new NinePatchInterval(start, end, pixel));
}