[Genome] Tracks with mouseover

[Angie Hinrichs]

Hi Archie,

It is possible, but it requires adding a bit of custom code to 
hgTracks.  

If you don't already have custom code for the track, let us know and 
we'll provide more info about how to set that up.  Also let us know 
the type of data in the track (bed, psl, genePred?) from the trackDb 
type setting.  

If you have already registered a track handler with custom code for 
your track in hgTracks.c, then this is a fairly straightforward 
extension.  

1. Copy the function refGeneMapName(...) to myTrackItemName(...), and 
modify it so that it returns an abbreviated *copy* of the name.  (That 
will work for most types of tracks with named items.)

2. Copy genericMapItem(...) to myTrackMapItem(...), and modify it as 
follows: in the call to mapBoxHgcOrHgGene, replace itemName (the short 
name) with mapItemName (the original, long name, to appear in the 
mouseover).

3. In myTrackMethods(), set tg->itemName to myTrackItemName and 
tg->mapItem to myTrackMapItem.

Recompile and let us know if what you see is not what you'd like.

Hope that helps,

Angie


On Wed, 11 Jul 2007, Russell, Archie wrote:

>  
> Hi,
> 
> Is it possible to create a track that has a different identifier pop up
> when I mouse over an element in the browser than is displayed before I
> mouse over it?   I have some long identifiers and want an abbreviated
> version to display until I hover over them.
> 
> Thanks,
> Archie
> 
> 
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