Adding different tooltips to a single widget

[Yann Renard <yann renard mailing-lists tiscali fr>]

Dear mailing list,

I have a problem with tooltips. I have a drawing aread which I use to
draw several things. I would like to provide tooltips on this drawing
area but the tooltip content should vary according to what is drawn
under the cursor and where the cursor is placed. Problem is I have a
single GtkWidget... GtkTipsQuery does not seem to fit my needs either.
What should be used in such context ?

Thank you for you help,
Best regards
Yann Renard