[Lazarus] TAChart marks on mouseoverpoint

[Alexander Klenin]

On Mon, Sep 21, 2009 at 23:39, Andrea Mauri <andrea.mauri.75 at gmail.com> wrote:
> Dear all,
> I am using TAChart and I would like to see the mark of a point when the
> point is clicked or the mouse is over it.
> Actually I do it using tchart.hint, TChartMouseMove event and
> GetNearestPoint function. In this way I show an hint any time the mouse pass
> over a point. Is it possible to do it directly using Marks of TChart?
> I would like to decide to show the mark of a single point and not for all
> the points in the serie.

If you do not mind using trunk version, then it is now possible ;-)
See dragdropdemo project.
Note however that this might have performance implications compared to your
implementation, because showing/hiding the mark requires full chart redraw.

-- 
Alexander S. Klenin