|  |  |  | libmrproject Reference Manual |  | 
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MrpRelation — represents a task predecessor relation in the project.
#include <mrproject/mrproject.h> struct MrpRelationPriv; struct MrpRelation; enum MrpRelationType; MrpTask* mrp_relation_get_predecessor (MrpRelation *relation); MrpTask* mrp_relation_get_successor (MrpRelation *relation); gint mrp_relation_get_lag (MrpRelation *relation); MrpRelationType mrp_relation_get_relation_type (MrpRelation *relation);
A predecessor relation is used to affect the scheduling of a task relative another task. The only type supported yet is "Finish to Start" (MRP_RELATION_FS). A relation may have a lag time associated to it, so that a task can be scheduled to start after another task has finished, plus a lag time.
struct MrpRelationPriv;
A private struct for internal use only. The definition of this structure is not publically available.
struct MrpRelation {
	MrpObject        parent;
	MrpRelationPriv *priv;
};
Object representing a predecessor relation between two tasks.
typedef enum {
	MRP_RELATION_NONE = 0, /* unset */
	MRP_RELATION_FS,       /* finish-to-start */
	MRP_RELATION_FF,       /* finish-to-finish */
	MRP_RELATION_SS,       /* start-to-start */
	MRP_RELATION_SF        /* start-to-finish */
} MrpRelationType;
The type of relation. Only finish to start is implemented yet.
| MRP_RELATION_NONE | invalid relation type (unset) | 
| MRP_RELATION_FS | finish to start | 
| MRP_RELATION_FF | finish to finish (unimplemented) | 
| MRP_RELATION_SS | start to start (unimplemented) | 
| MRP_RELATION_SF | start to finish (unimplemented) | 
MrpTask* mrp_relation_get_predecessor (MrpRelation *relation);
Retrieves the predecessor of relation.
| relation : | an MrpRelation | 
| Returns : | the predecessor task. | 
MrpTask* mrp_relation_get_successor (MrpRelation *relation);
Retrieves the successor of relation.
| relation : | an MrpRelation | 
| Returns : | the successor task. | 
gint mrp_relation_get_lag (MrpRelation *relation);
Retrieves the lag between the predecessor and successor in relation.
| relation : | an MrpRelation | 
| Returns : | Lag time in seconds. | 
MrpRelationType mrp_relation_get_relation_type (MrpRelation *relation);
Retrieves the relation type of relation.
| relation : | an MrpRelation | 
| Returns : | the MrpRelationType of the relation. | 
| << MrpProject | MrpResource >> |