Path

---

Object Hierarchy:

Description:

Content:

Static methods:

• public static void add_type (char type, int items, string description)
  Adds a new type to the path system, FIXME this should probably return something on registration conflicts, for now it expects all registered paths to be aware of each other.

Creation methods:

• public Path ()
  Creates a new Path with no nodes.
• public Path.from_string (string instructions)
  Creates a new Path with the nodes described in the string instructions.

Methods:

• public void @foreach (NodeFunction each_item)
  Execute a provided function for every node in the path (useful for drawing and otherwise traversing a path.
• public bool calc (double pos, out double x, out double y)
  Compute the coordinates of the path at the position ( length measured from start of path, not including discontinuities).
• public int calc_y_for_x (double x, out double y)
  Compute a corresponding y coordinate for a given x input coordinate, returns 0 if computed correctly and -1 if the path doesn't exist for the specified x coordinate.
• public void clear ()
  Remove all nods from a this.
• public double closest_point (double x, double y, out double on_path_x, out double on_path_y, out int node_pos_before)
  Figure out what and where on a path is closest to arbitrary coordinates.
• public void dirty ()
  Marks the path as dirty and issues an invalidation for the path rendering, use this if modifying the values of a GeglPathPoint inline.
• public void foreach_flat (NodeFunction each_item)
  Execute a provided function for the segments of a poly line approximating the path.
• public void freeze ()
  Make the GeglPath stop firing signals as it changes must be paired with a thaw for the signals to start again.
• public void get_bounds (out double min_x, out double max_x, out double min_y, out double max_y)
  Compute the bounding box of a path.
• public double get_length ()
  Returns the total length of the path.
• public void get_matrix (out unowned Matrix3 matrix)
  Get the transformation matrix of the path.
• public int get_n_nodes ()
  Retrieves the number of nodes in the path.
• public bool get_node (int index, out PathItem node)
  Retrieve the node of the path at position pos.
• public void insert_node (int pos, PathItem node)
  Insert the new node node at position pos in this.
• public bool is_empty ()
  Check if the path contains any nodes.
• public void parse_string (string instructions)
  Parses instructions and appends corresponding nodes to path (call gegl_path_clean first if you want to replace the existing path.
• public void remove_node (int pos)
  Removes the node number pos in this.
• public void replace_node (int pos, PathItem node)
  Replaces the exiting node at position pos in this.
• public void set_matrix (Matrix3 matrix)
  Set the transformation matrix of the path.
• public void thaw ()
  Restart firing signals (unless the path has been frozen multiple times ).
• public string to_string ()
  Serialize the paths nodes to a string.

Signals:

• public signal void changed (void* object)

Inherited Members: