> Hi,

> does anybody know, where can I get one? I need non-visual (descendant of
> TComponent, not TControl) component for drawing simple bar graphs on
canvas
> that I will pass to him. Visual are useless, since I want to use it in web
> application.

> Thanks.

> > does anybody know, where can I get one? I need non-visual (descendant of
> > TComponent, not TControl) component for drawing simple bar graphs on
canvas
> > that I will pass to him. Visual are useless, since I want to use it in
web
> > application.

> check out TPlot at my website below.

> it can be compiled (check out the {$DEFINE GUI} option in Plot.inc) to
produce a
> non-visual TComponent descendant, and so used in a console app (eg: a
cgi).
> however, under windows it still calls the Windows API (for TBitmap), and
under
> Linux it needs an X framebuffer server (see my earlier posts on this
subject)
> for the same reason.

> i have nearly completed work on version 3, which has major revisions and
> changes. one of these changes is a completely X-server-free version. this
is, i
> believe, exactly what is needed to efficiently create Apache CGIs and DSOs
that
> produce graphs without requiring an X server.

> this work will later be extended to provide a generic solution to image
> production with X Servers.

> cheers,

> Mat

> ________________________________________

> rm -rf /mnt/windows/
> ________________________________________

> Dr Mat Ballard,
> mat.ball...@Chemware.hypermart.net
> http://Chemware.hypermart.net/
> Linux Registered User #6854

> Thank you for your hint. I will try it and find out. I need a non-visual
> component because I need to place it on WebModule in ISAPI application (so
> there is no problem when component needs GUI functions), but most of
> charting components have their logic directly implemented in some TControl
> descendant which make them useless in non-visual apps. I would expect,
that
> charting components should have thier logic implemented in TComponent
> descendant and use TControl descendant like visual wrapper. I would make
> them more flexible.

> Thanks again.

> Martin

> yes, it's a bit of a problem: in order to be useful in a GUI app, a
graphing
> component needs to be descended from T{Win}Control; however, to be useable
in a
> web app (of whatever type) it needs to be a TComponent descendant (and
much more).

> i've already done the first with TPlot, and now it's a case of dealing
with the
> "much more". the path i chose was liberal use of $IFDEFs - which results
in code
> that looks horrible at first sight, but isn't too bad once you know the
> principle: if it's GUI-related, then cut it out.

> the "much more" problem is that of getting anything useful out of a
TComponent:
> yes, we can load the data, set the graph appearance, but how do we draw on
a
> "bitmap" of some sort: that was much harder to sort out.

> cheers and good luck,

> Mat

> ps: make sure you get the "Third Party" components as well !

> ________________________________________

> rm -rf /mnt/windows/
> ________________________________________

> Dr Mat Ballard,
> mat.ball...@Chemware.hypermart.net
> http://Chemware.hypermart.net/
> Linux Registered User #6854

> Hi,

> does anybody know, where can I get one? I need non-visual (descendant of
> TComponent, not TControl) component for drawing simple bar graphs on
canvas
> that I will pass to him. Visual are useless, since I want to use it in web
> application.

> Thanks.

> Martin