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Navigation: Code Documentation > RSCommon > GGraph > Classes

TWeightedEdge Class

The TWeightedEdge class is a descendant of the GGraph.TGGraphEdge class, it represents an edge in a weighted graph.

The TWeightedEdge class connects nodes ( GGraph.TGGraphNode objects and descendants) in a graph and contains a weight (or cost such as for a travelling salesman problem). The TWeightedEdge class is an undirected edge by its nature. The GGraph.TGCustomGraph class defines whether the edge is directed or undirected. In undirected graphs, the same edge appears in both the FromNode and ToNode edge lists. The FromNode is responsible for managing the edge's memory (freeing it).

Namespace: GGraph

	Name	Description
	Create(TGGraphNode,TGGraphNode)	Creates the edge and sets the FromNode and ToNode properties to their respective parameters. The edge is automatically added to the edge lists of the FromNode (and the ToNode's as well when the graph is undirected). (Inherited from GGraph.TGGraphEdge.)

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Name

Description

published property

FromNode

Specifies the node from which this edge is starting from. The ToNode property specifies the node to which the edge is going.

Note
In an undirected graph, the FromNode and ToNode nodes are equivalent.

The FromNode and ToNode properties are set in the constructor.

published property

ToNode

Specifies the node to which the edge is going. The FromNode property specifies the node from which this edge is starting from.

Note
In an undirected graph, the FromNode and ToNode nodes are equivalent.

The FromNode and ToNode properties are set in the constructor.

published property

Weight

Represents the weight or cost for traversing the edge. This property can be used to set up travelling salesman or similar problems.

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	Name	Description
	Assign(TPersistent)	Represents method Assign(TPersistent).
	Change	Called when the edge changes. The method propagates the change event to its from and to nodes. (Inherited from GGraph.TGGraphEdge.)
	FastClear(TGGraphNode)	FastClear is only called when all nodes are being deleted, that being so we don't have to tell our nodes we are going away (Inherited from GGraph.TGGraphEdge.)
	ReadData(TReader)	Reads the edge from a TReader stream (Overrides GGraph.TGGraphEdge.ReadData(TReader).)
	WriteData(TWriter)	Writes the edge to a TWriter stream (Overrides GGraph.TGGraphEdge.WriteData(TWriter).)

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