added core files for preset_node and preset_hub

src/x_preset.h

+
+#ifndef __x_preset_h_
+#define __x_preset_h_
+
+/*
+Global preset system by Ivica Ico Bukvic <ico@vt.edu> July, 2012
+*/
+
+// each node in the patch
+typedef struct _preset_node
+{
+    t_object pn_obj;
+    t_atom pn_val;			// last known value (null if not initialized)
+
+	t_symbol *pn_hub_name;	// hub name this node is associated with
+	t_preset_hub *pn_hub;	// pointer to the hub (null if none, equiv. to active/disabled)
+
+	t_canvas *pn_canvas;
+	int *pn_gl_loc;
+	int  pn_gl_loc_length;
+
+	// we use this to compare with the old position,
+	// so that hub can be notified of node's new position 
+	int *pn_old_gl_loc;
+	int  pn_old_gl_loc_length;
+
+	t_outlet *pn_outlet;
+} t_preset_node;
+
+// stores each of the presets per each preset_node
+typedef struct _node_preset
+{
+	int np_preset;
+	t_atom np_val;
+	struct _node_preset *np_next;
+} t_node_preset;
+
+// stores each of the nodes within a hub
+typedef struct _preset_hub_data
+{
+	t_preset_node *phd_node;		// if the node is erased, this will be NULL (inactive)
+	int *phd_pn_gl_loc;				// last known location of the node (according to the hub)
+	int  phd_pn_gl_loc_length;		// location array's length (see x_preset.c for explanation)
+	struct _preset_hub_data *phd_next;
+	t_node_preset *phd_npreset;
+} t_preset_hub_data;
+
+// preset hub (nexus for data saving/recalling)
+struct _preset_hub
+{
+	t_object ph_obj;
+	t_symbol *ph_name;
+	int ph_invis;					// make it invisible (only for the k12 mode)
+	int ph_preset;					// last enabled preset (-1 at init time)
+
+	t_canvas *ph_canvas;
+
+	struct _preset_hub *ph_next;	// next hub on the same canvas
+	t_preset_hub_data *ph_data;		// pointer to data (single-linked list)
+
+	t_outlet *ph_outlet;
+};
+
+typedef struct _glob_preset_hub_list
+{
+	t_preset_hub *gphl_hub;
+	struct _glob_preset_hub_list *gphl_next;
+} t_glob_preset_hub_list;
+
+typedef struct _glob_preset_node_list
+{
+	t_preset_node *gpnl_node;
+	int gpnl_paired;				// whether the node is paired with a hub (otherwise don't bother updating its location)
+	struct _glob_preset_node_list *gpnl_next;
+} t_glob_preset_node_list;
+
+#ifndef t_preset_hub
+#define t_preset_hub struct _preset_hub
+#endif
+
+EXTERN int we_are_undoing;
+
+#endif /* __x_preset_h_ */
+