[graphviz-interest] Tooltip or label highlighting on mouse hover

Hi North/Emden,

Please let me know whether any of the following three scenarios is achievable?


a.       Attaching tooltip to the nodes and edges.



I tried "tooltip", "edgetooltip", "nodetooltip", "labeltooltip" everything, but it didn't work for me.

Don't know whether it is because of some local changes in lefty files. I have attached the lefty files, I am using.



b.      Highlighting the label attached to the edges on mouse hover.

Here is a simple dot file that I tried.  Actually in huge graph, it is very difficult to identify which label is attached to which edge.

digraph _fsm2s {
size="8,5"
orientation=land;
FSM2S1[sgval="unreachable.v@@46@@FSM2S1",shape=circle];
FSM2S2[sgval="unreachable.v@@47@@FSM2S2",shape=circle,style=filled,color=yellow, tooltip="custom tooltip"];
FSM2S3[sgval="unreachable.v@@48@@FSM2S3",shape=circle];
FSM2S4[sgval="unreachable.v@@49@@FSM2S4",shape=circle];
FSM2S1 -> FSM2S3 [ label="",sgval="unreachable.v@@46@@FSM1S3" ];
FSM2S2 -> FSM2S3 [ label="",sgval="unreachable.v@@47@@FSM1S3" ];
FSM2S3 -> FSM2S4 [ label="",sgval="unreachable.v@@48@@FSM1S4" ];
FSM2S4 -> FSM2S1 [ label="ctl",sgval="unreachable.v@@50@@FSM1S1", edgetooltip="custom tooltip" ];
}




c.       If none of the above is possible, please let me know whether any lefty function is called on mouse hover over the edges.

If so, is it possible to get the edge name, so that we can use that to display some information related to edge.

Thanks and lot.

Regards,
Prantanu

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