Hi,
Edge drawing is implemented in specialized edge drawer classes in
igraph/drawing/edge.py. They all derive from an abstract base class called
AbstractEdgeDrawer, which defines a function named get_label_position()
that returns the position of the label for an edge. The default edge drawer
used by igraph is called ArrowEdgeDrawer.
You can therefore simply implement a new class derived from
ArrowEdgeDrawer, override its get_label_position() method, and then use
this custom edge drawer when plotting the graph as follows:
from igraph.drawing.edge import ArrowEdgeDrawer
from igraph.drawing.graph import DefaultGraphDrawer
from functools import partial
class CustomEdgeDrawer(ArrowEdgeDrawer):
# do your magic here
pass
my_drawer = partial(DefaultGraphDrawer,
edge_drawer_factory=CustomEdgeDrawer)
plot(graph, drawer_factory=my_drawer)
(Haven't tested it, but it should work).
All the best,
T.
On Wed, Dec 21, 2016 at 10:03 AM, José Juan Almagro Armenteros <
[email protected]> wrote:
> Hello,
>
> Thank you for the info. Could you indicate which function defines the
> position of the edge labels? At least I would like to change the default
> positions for all the labels.
>
> Best,
> Jose
>
> On 20/12/2016 21:10, Tamas Nepusz wrote:
>
> Hi,
>
> Unfortunately it is not possible to change the position of edge labels
> with the current plotting engine.
>
> All the best,
>
> T.
>
> On Tue, Dec 20, 2016 at 6:23 PM, José Juan Almagro Armenteros <
> [email protected]> wrote:
>
>> Hello,
>>
>> I have just started using this packages and I have generated a nice tree
>> plot. However, I haven't been able to change the position of the edge
>> labels and there is no documentation about it. Do you know how could I do
>> this?
>>
>> Best,
>> Jose
>>
>>
>> _______________________________________________
>> igraph-help mailing list
>> [email protected]
>> https://lists.nongnu.org/mailman/listinfo/igraph-help
>>
>
>
>
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>
>
>
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