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/**
* $Id: mxGraphHierarchyEdge.js,v 1.15 2012-06-12 20:23:14 david Exp $
* Copyright (c) 2006-2010, JGraph Ltd
*/
/**
* Class: mxGraphHierarchyEdge
*
* An abstraction of a hierarchical edge for the hierarchy layout
*
* Constructor: mxGraphHierarchyEdge
*
* Constructs a hierarchy edge
*
* Arguments:
*
* edges - a list of real graph edges this abstraction represents
*/
function mxGraphHierarchyEdge(edges)
{
mxGraphAbstractHierarchyCell.apply(this, arguments);
this.edges = edges;
};
/**
* Extends mxGraphAbstractHierarchyCell.
*/
mxGraphHierarchyEdge.prototype = new mxGraphAbstractHierarchyCell();
mxGraphHierarchyEdge.prototype.constructor = mxGraphHierarchyEdge;
/**
* Variable: edges
*
* The graph edge(s) this object represents. Parallel edges are all grouped
* together within one hierarchy edge.
*/
mxGraphHierarchyEdge.prototype.edges = null;
/**
* Variable: source
*
* The node this edge is sourced at
*/
mxGraphHierarchyEdge.prototype.source = null;
/**
* Variable: target
*
* The node this edge targets
*/
mxGraphHierarchyEdge.prototype.target = null;
/**
* Variable: isReversed
*
* Whether or not the direction of this edge has been reversed
* internally to create a DAG for the hierarchical layout
*/
mxGraphHierarchyEdge.prototype.isReversed = false;
/**
* Function: invert
*
* Inverts the direction of this internal edge(s)
*/
mxGraphHierarchyEdge.prototype.invert = function(layer)
{
var temp = this.source;
this.source = this.target;
this.target = temp;
this.isReversed = !this.isReversed;
};
/**
* Function: getNextLayerConnectedCells
*
* Returns the cells this cell connects to on the next layer up
*/
mxGraphHierarchyEdge.prototype.getNextLayerConnectedCells = function(layer)
{
if (this.nextLayerConnectedCells == null)
{
this.nextLayerConnectedCells = [];
for (var i = 0; i < this.temp.length; i++)
{
this.nextLayerConnectedCells[i] = [];
if (i == this.temp.length - 1)
{
this.nextLayerConnectedCells[i].push(this.source);
}
else
{
this.nextLayerConnectedCells[i].push(this);
}
}
}
return this.nextLayerConnectedCells[layer - this.minRank - 1];
};
/**
* Function: getPreviousLayerConnectedCells
*
* Returns the cells this cell connects to on the next layer down
*/
mxGraphHierarchyEdge.prototype.getPreviousLayerConnectedCells = function(layer)
{
if (this.previousLayerConnectedCells == null)
{
this.previousLayerConnectedCells = [];
for (var i = 0; i < this.temp.length; i++)
{
this.previousLayerConnectedCells[i] = [];
if (i == 0)
{
this.previousLayerConnectedCells[i].push(this.target);
}
else
{
this.previousLayerConnectedCells[i].push(this);
}
}
}
return this.previousLayerConnectedCells[layer - this.minRank - 1];
};
/**
* Function: isEdge
*
* Returns true.
*/
mxGraphHierarchyEdge.prototype.isEdge = function()
{
return true;
};
/**
* Function: getGeneralPurposeVariable
*
* Gets the value of temp for the specified layer
*/
mxGraphHierarchyEdge.prototype.getGeneralPurposeVariable = function(layer)
{
return this.temp[layer - this.minRank - 1];
};
/**
* Function: setGeneralPurposeVariable
*
* Set the value of temp for the specified layer
*/
mxGraphHierarchyEdge.prototype.setGeneralPurposeVariable = function(layer, value)
{
this.temp[layer - this.minRank - 1] = value;
};
/**
* Function: getCoreCell
*
* Gets the first core edge associated with this wrapper
*/
mxGraphHierarchyEdge.prototype.getCoreCell = function()
{
if (this.edges != null && this.edges.length > 0)
{
return this.edges[0];
}
return null;
};
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