RE: [jCharts-users] Trying to subclass

[Nathaniel G. A. <nat...@ya...>]

You should be able to do it with the existing library by using the
org.jCharts.axisChart.customRenderers package.  This basically allows you to set Listeners into
the rendering process of each bar on the chart.  So you could grab the Graphics2D Object and
render there.


--- Lora Lantzy <Lor...@sa...> wrote:
> I am attaching an image of the chart we are using (please let me know if you can not view it). 
> The new chart types that were created are the overlays (green line and red Ibars).  I was
> wondering if you could tell me if it was possible to create these overlays with the existing
> library.  
> 
> Again I appreciate your quick response.
> 
> Thank you,
> Lora Lantzy
> 
> 
> 
> -----Original Message-----
> From: Nathaniel G. Auvil [mailto:nat...@ya...] 
> Sent: Friday, April 23, 2004 11:31 AM
> To: jch...@li...
> Subject: RE: [jCharts-users] Trying to subclass
> 
> 
> 
> yes.  I guess I never really thought people would add chart types to the library; i figured
> people would just use it. My bad.
> 
> Would you care to donate the new chart types to the project?
> 
> 
> 
> 
> 
> --- Lora Lantzy <Lor...@sa...> wrote:
> > Yes the developer before me needed 4 new chart types which is why he 
> > modified ChartType.java and AxisChart.java.
> > 
> > If I am understanding you, then the correct way to add the new chart 
> > types is to modify these source files instead of subclassing.
> > 
> > I appreciate your quick response.
> > 
> > Thank you,
> > Lora Lantzy
> > 
> > -----Original Message-----
> > From: Nathaniel G. Auvil [mailto:nat...@ya...]
> > Sent: Friday, April 23, 2004 10:47 AM
> > To: jch...@li...
> > Subject: Re: [jCharts-users] Trying to subclass
> > 
> > 
> > 
> > Are you trying to add your own chart type?  If so, you would have to 
> > do several things to the internals of jcharts, including modifying 
> > that file.
> > 
> > the classes are abstract because they only contain static methods for 
> > rendering the chart. It gets driven by AxisChart.  And unless you are 
> > creating a new chart type, this should not be of concern as you would 
> > not call these classes directly.
> > 
> > 
> > 
> > 
> > --- Lora Lantzy <Lor...@sa...> wrote:
> > > I inherited some JCharts code from another developer and am trying 
> > > to
> > > subclass ChartType.java and AxisChart.java.  The previous programmer 
> > > edited the JCharts source code which has now prevented me from using 
> > > the latest version.  I have run into some problems especially with 
> > > ChartType.java.  The constructor is private and thus I am unable to 
> > > subclass it.  I am sure there is a reason for making it private but I 
> > > am hoping there is a solution for those who need to subclass 
> > > ChartType.  With AxisChart, I am running into problems since all the 
> > > classes (AreaChart, BarChart, LineChart, etc) are abstract.  I would 
> > > appreciate any help that can be provided.
> > > 
> > > Thank you,
> > > Lora Lantzy
> > > 
> > > 
> > > 
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> ATTACHMENT part 2 image/gif name=chart.gif




	
		
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