--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pkg-src/tree-x/tree.h	Mon Aug 13 09:43:35 2007 +0200
@@ -0,0 +1,102 @@
+/* ----------------------------------------------------------------------------
+ * File    : tree.h
+ * Purpose : Header file for dynamic tree program
+ * ----------------------------------------------------------------------------
+ */
+
+#define INTF 1		/* enable interface-specific code */
+
+#define FOREACH_CHILD(child, tree) \
+   for ((child) = (tree)->child ; (child) ; (child) = (child)->sibling)
+
+#define PT_IN_RECT(p1, p2, x1, y1, x2, y2)   \
+	 ((p1) > (x1) &&                      \
+	  (p2) > (y1) &&                       \
+	  (p1) < (x2) &&                        \
+	  (p2) < (y2))
+
+#define PT_IN_EXTENT(p1, p2, extent)                 \
+	 ((p1) > (extent).pos.x &&                    \
+	  (p2) > (extent).pos.y &&                     \
+	  (p1) < ((extent).pos.x + (extent).width) &&   \
+	  (p2) < ((extent).pos.y + (extent).height))
+
+#define IS_LEAF(node) \
+   ((node)->child == NULL)
+
+typedef struct line  Polyline;
+typedef struct tnode Tree;
+
+typedef struct point {
+   int x;
+   int y;
+} Point;
+
+typedef struct extent {
+   Point pos;			/* top left corner of rectangle     */
+   int width;
+   int height;
+} Extent;
+
+struct line {
+   int dx, dy;
+   Polyline *link;
+};
+
+typedef struct polygon {
+   struct {
+      Polyline *head;
+      Polyline *tail;
+   } lower, upper;
+} Polygon;
+
+typedef struct label {
+   char *text;			/* the actual label text */
+   int len;			/* length of label text  */
+   int xoffset;			/* the X offset of label inside rectangle */
+   int yoffset;			/* the Y offset of label inside rectangle */
+} Label;
+
+struct tnode {
+   Tree    *parent;
+   Tree    *child;
+   Tree    *sibling;
+   int      width;
+   int      height;
+   int      border;
+   Polygon  contour;
+   Point    offset;		/* offset is relative to 'predecessor'    */
+   Point    pos;	        /* position is screen coordinates of node */
+   Point    old_pos;	        /* position is screen coordinates of node */
+   int      node_height;	/* height of node in tree */
+   /* all fields below are interface-specific */
+   Label    label;
+   char*    value;
+   Extent   subextent;		/* extent of subtree (excluding this node) */
+   Polygon  old_contour;	/* for caching old contour in elision      */
+   char     elision;		/* TRUE if this node is collapsed          */
+   char     on_path;		/* true if on path to root from node       */
+   char     split;              /* flag for drawing subtree contours       */
+   char     show_contour;	/* flag to show or hide subtree contour    */
+};
+
+typedef enum {
+   Erase,
+   Draw
+} DrawMode;
+
+typedef enum {
+   Old,
+   New
+} PosMode;			/* Position mode */
+
+extern Polyline* MakeLine();
+extern Tree*     MakeNode();
+extern Tree*     ReadTreeFromFile();
+extern void      ComputeTreeSize();
+extern void      Unzip();
+extern void      Zip();
+
+extern Tree     *TheTree;
+extern int       NumLines;
+extern int       NumNodes;