Package dev.roanh.gmark.util

Class GraphPanel.Edge

java.lang.Object

dev.roanh.gmark.util.GraphPanel.Edge

Enclosing class:

GraphPanel<V,E>

private class GraphPanel.Edge
extends Object

Object that holds both data on the actual graph edge and data required to properly visualise the edge.

See Also:

• GraphPanel<V,E>.Node
• UniqueGraph
• UniqueGraph.GraphEdge

Field Summary

Fields

Modifier and Type	Field	Description
private UniqueGraph.GraphEdge<V,E>	data	The actual graph edge this edge is associated with.
private GraphPanel<V,E>.Node	source	The source node for this edge.
private GraphPanel<V,E>.Node	target	The target node for this edge.
private UniqueGraph.GraphEdge<V,E>	twin	The edge going in the opposite direction if it exists.
private static final int	UNIT	The size of the arrow heads for the directed edges.

Constructor Summary

Constructors

Modifier	Constructor	Description
private	Edge(GraphPanel<V,E>.Node source, GraphPanel<V,E>.Node target, UniqueGraph.GraphEdge<V,E> data)	Constructs a new edge with the given source node, target node and associated graph edge.

Method Summary

Modifier and Type	Method	Description
private void	drawArrowHead(Graphics2D g, double x1, double y1, double x2, double y2)	Draws the arrow head for a directed edge at the given location and with the given graphics context.
private void	paint(Graphics2D g)	Renders this edge using the given graphics context.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

UNIT

private static final int UNIT

The size of the arrow heads for the directed edges.

See Also:

• Constant Field Values

source

private GraphPanel<V,E>.Node source

The source node for this edge.

target

private GraphPanel<V,E>.Node target

The target node for this edge.

data

private UniqueGraph.GraphEdge<V,E> data

The actual graph edge this edge is associated with.

twin

private UniqueGraph.GraphEdge<V,E> twin

The edge going in the opposite direction if it exists.

Constructor Details

Edge

private Edge(GraphPanel<V,E>.Node source,
 GraphPanel<V,E>.Node target,
 UniqueGraph.GraphEdge<V,E> data)

Constructs a new edge with the given source node, target node and associated graph edge.

Parameters:

source - The source node for this edge.

target - The target node for this edge.

data - The graph edge this edge visualises.

Method Details

paint

private void paint(Graphics2D g)

Renders this edge using the given graphics context.

Parameters:

g - The graphics context to use.

drawArrowHead

private void drawArrowHead(Graphics2D g,
 double x1,
 double y1,
 double x2,
 double y2)

Draws the arrow head for a directed edge at the given location and with the given graphics context. Note: the arrow head is automatically offset from the center of the target node based on the radius of the node.

Parameters:

g - The graphics context to use.

x1 - The x-coordinate of the source node of the edge the arrow head belongs to.

y1 - The y-coordinate of the source node of the edge the arrow head belongs to.

x2 - The x-coordinate of the target node of the edge the arrow head belongs to.

y2 - The y-coordinate of the target node of the edge the arrow head belongs to.