private static Pair<Image, Point> createDragImage(
final Tree tree, final Component c, Point dragOrigin, boolean adjustToPathUnderDragOrigin) {
if (c instanceof JComponent) {
((JComponent) c).setOpaque(true);
}
c.setForeground(tree.getForeground());
c.setBackground(tree.getBackground());
c.setFont(tree.getFont());
c.setSize(c.getPreferredSize());
final BufferedImage image =
new BufferedImage(c.getWidth(), c.getHeight(), BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = (Graphics2D) image.getGraphics();
g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.7f));
c.paint(g2);
g2.dispose();
Point point = new Point(-image.getWidth(null) / 2, -image.getHeight(null) / 2);
if (adjustToPathUnderDragOrigin) {
TreePath path = tree.getPathForLocation(dragOrigin.x, dragOrigin.y);
if (path != null) {
Rectangle bounds = tree.getPathBounds(path);
point = new Point(bounds.x - dragOrigin.x, bounds.y - dragOrigin.y);
}
}
return new Pair<Image, Point>(image, point);
}
/**
* Tries to calculate the position to use for showing hint for the given node of the given tree.
*
* @param node target node for which a hint should be shown
* @param tree target tree that contains given node
* @return preferred hint position (in coordinates relative to the given tree) if it's possible to
* calculate the one; <code>null</code> otherwise
*/
@Nullable
public static Point getHintPosition(
@NotNull GradleProjectStructureNode<?> node, @NotNull Tree tree) {
final Rectangle bounds = tree.getPathBounds(new TreePath(node.getPath()));
if (bounds == null) {
return null;
}
final Icon icon = ((GradleProjectStructureNode) node).getDescriptor().getOpenIcon();
int xAdjustment = 0;
if (icon != null) {
xAdjustment = icon.getIconWidth();
}
return new Point(bounds.x + xAdjustment, bounds.y + bounds.height);
}