Exemplo n.º 1
0
  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);
 }