About ( self )

Return a HTML-page giving information about the graph

AddEdge (
        self,
        tail,
        head,
        )

Internal Add Edge. Note: unless graph is Euclidian weight is set to 0. No error checking !

AddVertex (
        self,
        x,
        y,
        )

Internal Add a new vertex at (x,y) NOTE: Assumes x,y to be in embedding coordinates

edit commands

AddVertexCanvas (
        self,
        x,
        y,
        )

Internal Add a new vertex at (x,y) NOTE: Assumes x,y to be in canvas coordinates

Blink (
        self,
        list,
        color=cVertexBlink,
        )

Blink all edges or vertices in list with color. Edges are specified as (tail,head).

Number of times, speed, default color is specified in GatoGlobals.py. No error checking! Handles undirected graphs.

BlinkEdge (
        self,
        tail,
        head,
        color=cVertexBlink,
        )

Blink edge (tail,head) with color. Number of times, speed, default color is specified in GatoGlobals.py. No error checking! Handles undirected graphs.

BlinkVertex (
        self,
        v,
        color=cVertexBlink,
        )

Blink vertex v with color. Number of times, speed, default color is specified in GatoGlobals.py. No error checking!

CanvasToEmbedding (
        self,
        x,
        y,
        )

Internal Convert canvas coordinates to embedding

CreateDirectedDrawEdge (
        self,
        t,
        h,
        curved,
        w,
        )

Internal Create an directed draw edge. t, h are Point2Ds

CreateDirectedLoopDrawEdge (
        self,
        v,
        w,
        orientation=None,
        )

Internal Create an directed loop draw edge. v is a Point2D

CreateDrawEdge (
        self,
        tail,
        head,
        )

Internal Create a draw edge for (tail,head) on the canvas. Position is determined by the position of the vertices (or the embedding if the draw vertices do not exist yet).

CreateDrawItems ( self )

Internal Create items on the canvas

CreateDrawLabel ( self,  v )

Internal Create a draw label for v on the canvas. Position is determined by the embedding specified. Text is specified by the labeling:

Call only after CreateDrawVertex()

CreateDrawVertex (
        self,
        v,
        x=None,
        y=None,
        )

Internal Create a draw vertex for v on the canvas. Position is determined by the embedding unless explictely passed as x,y in canvas coordinates

CreateEdgeAnnotation (
        self,
        tail,
        head,
        annotation,
        color,
        )

Internal Create an edge annotation for (tail,head) on the canvas. Position is determined by the embedding specified.

CreateUndirectedDrawEdge (
        self,
        t,
        h,
        w,
        )

Internal Create an undirected draw edge. t, h are Point2Ds

CreateUndirectedLoopDrawEdge (
        self,
        v,
        w,
        orientation=None,
        )

Internal Create an undirected loop draw edge. v is a Point2D

CreateVertexAnnotation (
        self,
        v,
        annotation,
        color,
        )

Internal Create a vertex annotation for v on the canvas. Position is determined by the position of the corresponding draw vertex on the canvas.

CreateWidgets ( self )

Internal Create UI-Elements (except Frame/Toplevel)

DefaultInfo ( self,  event=None )

Internal Put default info into info box

DeleteDrawEdges ( self )

Internal Delete draw edges on the canvas

DeleteDrawItems ( self )

Internal Delete all items on the canvas and clear up our references to it

DeleteDrawLabels ( self )

Internal Delete draw labels on the canvas

DeleteDrawVertices ( self )

Internal Delete draw vertices on the canvas

DeleteEdge (
        self,
        tail,
        head,
        repaint=1,
        )

Internal Delete edge (tail,head)

DeleteEdgeAnnotations ( self )

Internal Delete all edge annotations on the canvas

DeleteVertex ( self,  v )

Internal Delete vertex v

DeleteVertexAnnotations ( self )

Internal Delete all vertex annotations on the canvas

EdgeInfo ( self,  event )

Internal Call back routine bound to MouseEnter of edges. Produces default info for edges unless a user supplied informer has been registered with RegisterGraphInformer()

EmbeddingToCanvas (
        self,
        x,
        y,
        )

Internal Convert Embedding coordinates to Canvas

FindEdge ( self,  event )

Internal Given an event find the correspoding edge

FindGridVertex ( self,  event )

Internal Given an event find the correspoding grid vertex

FindVertex ( self,  event )

Internal Given an event find the correspoding vertex

GetCanvasCenter ( self )

Internal Return the center of the canvas in pixel

GetEdgeColor (
        self,
        tail,
        head,
        )

Return color of (tail,head). No error checking! Handles undirected graphs.

GetVertexColor ( self,  v )

Return the color of v

MouseUp ( self,  event )

Callback method for <B1-ButtonRelease>. Finds the vertex/edge clicked and calls the registered clickhandler

MoveVertex (
        self,
        v,
        x,
        y,
        doUpdate=None,
        )

Internal Move vertex v to position (x,y) NOTE: Assumes x,y to be in canvas coordinates if doUpdate=None and in embedding coordinates else

PrintToPSFile ( self,  fileName )

Produce an EPSF of canvas in fileName. Note: Graph gets scaled and rotated as to maximize size while still fitting on paper

RegisterClickhandler ( self,  handler )

A clickhandler is a function being called when the user clicks on a vertex or an edge (actually releases mouse button 1 over a vertex or an edge).

The clickhandler takes a string vertex or edge as the first and the vertex/edge clicked on as the second argument

RegisterGraphInformer ( self,  Informer )

A graph informer is an object which supplies information about the graph, its vertices and its edges. It needs methods

• DefaultInfo() - VertexInfo(v) - EdgeInfo(tail,head)

If none is registered, information will be produced by GraphDisplay. Infos are displayed in info field at the bottom of the graph window.

SetAllEdgesColor (
        self,
        color,
        graph=None,
        leaveColors=None,
        )

Change the color of all edges to color at once You can also pass an induced subgraph

SetAllVerticesColor (
        self,
        color,
        graph=None,
        )

Change the color of all vertices to color at once You can also pass an induced subgraph

SetEdgeAnnotation (
        self,
        tail,
        head,
        annotation,
        color="black",
        )

Add an annotation to (tail,head). Annotations are displayed to the left and the bottom of v and allow to display more info about a vertex. No error checking! Does not handle edge deletions/moves !

SetEdgeColor (
        self,
        tail,
        head,
        color,
        )

Change color of (tail,head) to color. No error checking! Handles undirected graphs.

SetVertexAnnotation (
        self,
        v,
        annotation,
        color="black",
        )

Add an annotation to v. Annotations are displayed to the left and the bottom of v and allow to display more info about a vertex. No error checking! Does not handle vertex deletions/moves !

SetVertexColor (
        self,
        v,
        color,
        )

Change color of v to color. No error checking!

Animator commands

SetVertexFrameWidth (
        self,
        v,
        val,
        )

Set the width of the black frame of a vertex to val

ShowGraph (
        self,
        G,
        graphName,
        )

Display graph G name graphName. Currently we assume that for the embedding (x,y) of every vertex < x < 1000 and 0 < y < 1000 holds

SwapEdgeOrientation (
        self,
        tail,
        head,
        )

Internal If graph is directed and we do not have edges in both directions, change the orientation of the edge (tail,head)

UnregisterClickhandler ( self )

Unregister the handler

UpdateInfo ( self,  neuText )

Internal Update text in info box

UpdateVertexLabel (
        self,
        v,
        blink=1,
        color=cLabelBlink,
        )

Visualize the changing of v's label. After changing G.labeling[v], call UpdateVertexLabel to update the label in the graph window, blinking blink times with color. No error checking!

VertexInfo ( self,  event )

Internal Call back routine bound to MouseEnter of vertices and labels. Produces default info for vertices unless a user supplied informer has been registered with RegisterGraphInformer()

VertexPosition ( self,  v )

Return the position of vertex v in canvas coordinates

Zoom ( self,  percent )

Internal Perform a zoom to specified level