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Adding arrowhead2 & 3 markers to SVG for graphs #2

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Adding arrowhead2 & 3 markers to SVG for graphs #2

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29 changes: 28 additions & 1 deletion implementation/library-d3-svg/js/GraphDrawer.js
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Original file line number Diff line number Diff line change
Expand Up @@ -118,6 +118,33 @@ GraphDrawer = function(svgOrigin,extraMargin,transTime){
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)

/* Add the arrowhead markers for directed edges in the SVG images */
var defs = svgOrigin
.attr("id","graph-defs")
.append("defs");

defs.append("marker")
.attr("id", "arrowhead2")
.attr("refX",24) /*must be smarter way to calculate shift*/
.attr("refY",4)
.attr("markerUnits","userSpaceOnUse")
.attr("markerWidth", 24)
.attr("markerHeight", 8)
.attr("orient", "auto")
.append("path")
.attr("d", "M 0,0 V 8 L12,4 Z"); //this is actual shape for arrowhead

defs.append("marker")
.attr("id", "arrowhead3")
.attr("refX",24) /*must be smarter way to calculate shift*/
.attr("refY",4)
.attr("markerUnits","userSpaceOnUse")
.attr("markerWidth", 24)
.attr("markerHeight", 8)
.attr("orient", "auto-start-reverse")
.append("path")
.attr("d", "M 0,0 V 8 L12,4 Z"); //this is actual shape for arrowhead

var svg = svgOrigin.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");

Expand Down Expand Up @@ -422,4 +449,4 @@ GraphDrawer.prototype.nodePos = function(d){
obj.x = this.x(this.nodeX(d));
obj.y = this.y(this.nodeY(d));
return obj;
}
}