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List:       koffice-devel
Subject:    Re: Using KChart
From:       Inge Wallin <inge () lysator ! liu ! se>
Date:       2007-01-17 23:32:38
Message-ID: 200701180032.38816.inge () lysator ! liu ! se
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On Tuesday 16 January 2007 23.55, Frédéric Lambert wrote:
> Hello everybody!
>
> I'm have to add a chart widget in a pannel of KPlato and i'm wondering how
> can i use KChart do do that or if any others chart widgets exists.

Hi Frédéric, and the others.

I think I should answer some of the questions that were brought up in the 
earlier mails and this one. I am the maintainer of KChart, and as Thomas said 
have had far too little time to work on it as much as I should.

KChart does use a commercial widget called KDChart as it's main engine. It was 
donated under the GPL by its creators Klarälvdalens Datakonsult AB (KDAB) to 
be used by KChart. The KChart classes and adds only a few extra features to 
it, the main work is done by KDChart.
 - Encapsulation into a KPart so that it can be embedded into other KOffice 
components as well as other KDE applications, e.g. konqueror.
 - A configuration dialog
 - A wizard

That was for 1.x.  For 2.0, several things must be done:
 - Exchange KDChart 1.1.x for KDChart 2.0, which is based on Qt4 instead of 
Qt3.
 - Embed it into a Flake shape as well as a KPart.  The Flake shape is for 
embedding in koffice, and the KPart for embedding in other KDE applications 
like konqueror.
 - Load and save in the OpenDocument Format.

I have already imported KDChart 2.0 into the KChart sources in the directory 
kchart/kdchart.  The old 1.1.4 sources are in kchart/kdchart1, and they will 
be removed when kdchart 2.0 is fully integrated.

A quick way for you to  embed a chart into KPlato is to move kchart/kdchart 
into the koffice libraries, and then make a Flake shape out of it. You can 
use the kdchart API directly, no reason to go into KChart at this time, and 
when I get more time, I can add tools to it that implement the configuration 
dialog. This dialog will probably be implemented as a Flake tool.

What do you think?  And btw, Thomas, you are probably the biggest authority on 
Flake right now, what do you think?

	-Inge

> Thanks!

-- 
Inge Wallin               | Thus spake the master programmer:               |
                          |      "After three days without programming,     |
inge@lysator.liu.se       |       life becomes meaningless."                |
                          | Geoffrey James: The Tao of Programming.         |
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