Class GraphDrawingPack.DirEdgeDrawing 
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Class GraphDrawingPack.DirEdgeDrawing 

java.lang.Object
   |
   +----GraphDrawingPack.DirEdgeDrawing
public class DirEdgeDrawing
extends Object
implements EdgeDrawingInterface
DirEdgeDrawing: implements all methods for drawing directed edges on canvas. Directed edges are arcs between two vertices with an EdgeShape (default arrow) in the middle. The midpoint of the arc is the active area of the edge and is indicated by the EdgeShape. If there is one directed edge between two vertices, it is drawn as a straight line. If there are two directed edges then the edges bow out in an arc. Right now, due to a rounding error, if the vertices are far apart the edges don\'t exactly reach the vertices. This should be fixed.

Highlighted edges are red, and plain edges are black.

bottom
left
midx
midy
numdegs
right
shape
startang
top
type

DirEdgeDrawing(Edge)

EdgeinRect(double, double, double, double)
return true if active portion of this edge is in rectangle
drawEdge(GraphCanvas)
draw this edge on GraphCanvas
getShape()
return string name of edge shape
midx()
return x-value of midpoint
midy()
return y-value of midpoint
ptInEdge(GraphCanvas, double, double)
return true if pt(x,y) is in active portion of this edge
setShape(String)
set EdgeShape.
update()
recalculate drawing information for the edge

midx 
  public int midx
midy 
  public int midy
left 
  public int left
top 
  public int top
right 
  public int right
bottom 
  public int bottom
startang 
  public int startang
numdegs 
  public int numdegs
shape 
  public EdgeShapeInterface shape
type 
  public int type

DirEdgeDrawing 
  public DirEdgeDrawing(Edge _e)

drawEdge 
  public void drawEdge(GraphCanvas gc)
draw this edge on GraphCanvas

ptInEdge 

  public boolean ptInEdge(GraphCanvas gc,
                          double x,
                          double y)
return true if pt(x,y) is in active portion of this edge

EdgeinRect 

  public boolean EdgeinRect(double x,
                            double y,
                            double x2,
                            double y2)
return true if active portion of this edge is in rectangle

setShape 

  public void setShape(String t)
set EdgeShape. Currently choices are "ARROW", "INHERITS", "IMPLEMENTING", and "AGGREGATION". Any other string sets type="ARROW"

getShape 

  public String getShape()
return string name of edge shape

update 

  public void update()
recalculate drawing information for the edge

midx 

  public int midx()
return x-value of midpoint

midy 

  public int midy()
return y-value of midpoint 

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