jcharts-users — For users of jCharts

Re: [jCharts-users] PointChart with X,Y-Coordinates like ScatterPlotChart?

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

This functionality is not there.  It should not be too difficult to modify the existing XY
renderer to not connect the dots so to speak.



--- thomas bauer <tm...@gm...> wrote:
> hi,
> 
> I'm looking forward to make a PointChart using X and Y Values like
> ScatterPlotAxisChart.
> for example: I want to draw Shapes on coordinates (1.5, 2.05)(1.8,
> 2.12)(3.25, 1.18)(7.65, 0.02).
> In the User's guide 0.3.0 there is only an example using DataSeries with
> xAxisLabels. 
> Is it possible to do this? Do you have an example?
> 
> thanks for any help
> tom
> 
> -- 
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> 
> 
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[jCharts-users] PointChart with X,Y-Coordinates like ScatterPlotChart?

[thomas b. <tm...@gm...>]

hi,

I'm looking forward to make a PointChart using X and Y Values like
ScatterPlotAxisChart.
for example: I want to draw Shapes on coordinates (1.5, 2.05)(1.8,
2.12)(3.25, 1.18)(7.65, 0.02).
In the User's guide 0.3.0 there is only an example using DataSeries with
xAxisLabels. 
Is it possible to do this? Do you have an example?

thanks for any help
tom

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Re: [jCharts-users] Labels on Line chart

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

This is not possible yet.


--- Parul GOYAL <par...@st...> wrote:
> Hello,
> 
> Is it possible to show value labels with line charts?
> If yes, can u please give me a sample code snippet..
> 
> thanks..
> parul
> 
> 
> 
> -------------------------------------------------------
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[jCharts-users] Labels on Line chart

[Parul G. <par...@st...>]

Hello,

Is it possible to show value labels with line charts?
If yes, can u please give me a sample code snippet..

thanks..
parul

[jCharts-users] Xvfb

[Gabriel M. <gab...@ge...>]

I solved my previous issue by starting X and setting the DISPLAY envvar.
Does anyone have an example of running Xvfb with JCharts? (I'm using 1.3 so
I MUST use some form of X)

    Thanks,
    Gabriel Mihalache

RE: [jCharts-users] jCharts 0.7.5 on IBM SDK 1.3.1/WebSphere5.0

[Ducret, G. (MSCI) <Gil...@ms...>]

NB: this fix is available only if you use jdk 1.4.

There are many description on how to fix this issue on the net.

Gilles

-----Original Message-----
From: jch...@li...
[mailto:jch...@li...] On Behalf Of Ducret,
Gilles (MSCI)
Sent: Friday, January 16, 2004 8:53 AM
To: jch...@li...
Subject: RE: [jCharts-users] jCharts 0.7.5 on IBM SDK 1.3.1/WebSphere5.0


Hi,

Your problem must be quite simple.

Are you using jdk 1.4.

I think you just have to put the following property when you Start
websphere:

java.awt.headless=3Dtrue

This way you will be able to generate graphs on the server
Side without needing a X11 server

Gilles

-----Original Message-----
From: jch...@li...
[mailto:jch...@li...] On Behalf Of Gabriel
Mihalache
Sent: Friday, January 16, 2004 8:27 AM
To: JCharts Users
Subject: [jCharts-users] jCharts 0.7.5 on IBM SDK 1.3.1/WebSphere5.0


Hi!
I'm a long time user of JCharts. I've usualy used it on Tomcat with the
Sun JDK. For a current project I have to use it on WebSphere 5.0 on
Linux.

I use a Servlet to generate the charts, and I use its init() method to
prepare the properties, etc. When I try to set the ChartFont I get a
ClassDefNotFound because of a class called
sun/awt/X11GraphicsEnvironment

WebSphere can only run on the IBM SDK, which I assume lacks these sun.*
classes. The machine is running a X server, although I'm not sure about
the rights the websphere user has over it. A simillar confiration, but
on Windows, works file.

What can you recommend?



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RE: [jCharts-users] jCharts 0.7.5 on IBM SDK 1.3.1/WebSphere5.0

[Ducret, G. (MSCI) <Gil...@ms...>]

Hi,

Your problem must be quite simple.

Are you using jdk 1.4.

I think you just have to put the following property when you
Start websphere:

java.awt.headless=3Dtrue

This way you will be able to generate graphs on the server
Side without needing a X11 server

Gilles

-----Original Message-----
From: jch...@li...
[mailto:jch...@li...] On Behalf Of Gabriel
Mihalache
Sent: Friday, January 16, 2004 8:27 AM
To: JCharts Users
Subject: [jCharts-users] jCharts 0.7.5 on IBM SDK 1.3.1/WebSphere5.0


Hi!
I'm a long time user of JCharts. I've usualy used it on Tomcat with the
Sun JDK. For a current project I have to use it on WebSphere 5.0 on
Linux.

I use a Servlet to generate the charts, and I use its init() method to
prepare the properties, etc. When I try to set the ChartFont I get a
ClassDefNotFound because of a class called
sun/awt/X11GraphicsEnvironment

WebSphere can only run on the IBM SDK, which I assume lacks these sun.*
classes. The machine is running a X server, although I'm not sure about
the rights the websphere user has over it. A simillar confiration, but
on Windows, works file.

What can you recommend?



-------------------------------------------------------
The SF.Net email is sponsored by EclipseCon 2004
Premiere Conference on Open Tools Development and Integration See the
breadth of Eclipse activity. February 3-5 in Anaheim, CA.
http://www.eclipsecon.org/osdn
_______________________________________________
jCharts-users mailing list
jCh...@li...
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[jCharts-users] jCharts 0.7.5 on IBM SDK 1.3.1/WebSphere5.0

[Gabriel M. <gab...@ge...>]

Hi!
I'm a long time user of JCharts. I've usualy used it on Tomcat with the Sun
JDK.
For a current project I have to use it on WebSphere 5.0 on Linux.

I use a Servlet to generate the charts, and I use its init() method to
prepare the properties, etc.
When I try to set the ChartFont I get a ClassDefNotFound because of a class
called sun/awt/X11GraphicsEnvironment

WebSphere can only run on the IBM SDK, which I assume lacks these sun.*
classes. The machine is running a X server, although I'm not sure about the
rights the websphere user has over it.
A simillar confiration, but on Windows, works file.

What can you recommend?

Re: [jCharts-users] what version of jcharts is compatible with JUST jdk 1.2 with addons?

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

0.7.5 should run if you use the legacy jpeg encoder

You need a Servlet Container such as Tomcat



--- Rex Piper <pi...@re...> wrote:
> and what addons will i need for servlet based system?
> 
> thank you ahead of time,
> 
> rex
> 
> 
> 
> 
> 
> -------------------------------------------------------
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[jCharts-users] what version of jcharts is compatible with JUST jdk 1.2 with addons?

[Rex P. <pi...@re...>]

and what addons will i need for servlet based system?

thank you ahead of time,

rex

Re: [jCharts-users] How to load image into a jsp?

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

--- Anubhav Kale <anu...@pe...> wrote:
> Hello...
> 
> I checked PieChart2DServlet.java .
> 1)Can you please elaborate on how to load this servlet from jsp (I do 
> not want to give any url etc.So basically I dont want to call the 
> servlet based on some event).


HTTP is based on URL's so you have to use them.  Simply have a HTML <img
src="...someURL/execute/myChartServlet"/>

 
> 2)By storing it in session do you mean the
> 
> ServletEncoderHelper.encodeJPEG13 method?
> 
> "call the servlet to load the chart as an image." Can you please explain how to do this exactly?
> 
> Thanks a lot
> 
> Anubhav
> 
> 
> 
> 
> 
> 
> Ducret, Gilles (MSCI) wrote:
> 
> >Check the examples, it works fine.
> >
> >Use the servlet to generate the chart and store it in the session.
> >
> >>From the jsp, call the servlet to load the chart as an image.
> >
> >It is described in the examples and works very well.
> >
> >Regards
> >
> >Gilles
> >
> >-----Original Message-----
> >From: jch...@li...
> >[mailto:jch...@li...] On Behalf Of Anubhav
> >Kale
> >Sent: Tuesday, January 13, 2004 11:41 AM
> >To: jch...@li...
> >Subject: [jCharts-users] How to load image into a jsp?
> >
> >
> >Hello...
> >
> >I want to write a jsp. To this page some data will be passed,based on 
> >this data I want to draw a piechart. What code do I have to write in the
> >
> >jsp (to load the image,location of class that creates the image etc)
> >
> >Thanks
> >
> >Anubhav
> >
> >
> >
> >-------------------------------------------------------
> >This SF.net email is sponsored by: Perforce Software.
> >Perforce is the Fast Software Configuration Management System offering
> >advanced branching capabilities and atomic changes on 50+ platforms.
> >Free Eval! http://www.perforce.com/perforce/loadprog.html
> >_______________________________________________
> >jCharts-users mailing list
> >jCh...@li...
> >https://lists.sourceforge.net/lists/listinfo/jcharts-users 
> >--------------------------------------------------------
> > 
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> confidentiality or privilege, and use is prohibited. 
> > 
> >
> >
> >-------------------------------------------------------
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> >Perforce is the Fast Software Configuration Management System offering
> >advanced branching capabilities and atomic changes on 50+ platforms.
> >Free Eval! http://www.perforce.com/perforce/loadprog.html
> >_______________________________________________
> >jCharts-users mailing list
> >jCh...@li...
> >https://lists.sourceforge.net/lists/listinfo/jcharts-users
> >
> >
> >  
> >
> 
> 
> 
> 
> -------------------------------------------------------
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> Perforce is the Fast Software Configuration Management System offering
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Re: [jCharts-users] How to load image into a jsp?

[Anubhav K. <anu...@pe...>]

Hello...

I checked PieChart2DServlet.java .
1)Can you please elaborate on how to load this servlet from jsp (I do 
not want to give any url etc.So basically I dont want to call the 
servlet based on some event).

2)By storing it in session do you mean the

ServletEncoderHelper.encodeJPEG13 method?

"call the servlet to load the chart as an image." Can you please explain how to do this exactly?

Thanks a lot

Anubhav






Ducret, Gilles (MSCI) wrote:

>Check the examples, it works fine.
>
>Use the servlet to generate the chart and store it in the session.
>
>>From the jsp, call the servlet to load the chart as an image.
>
>It is described in the examples and works very well.
>
>Regards
>
>Gilles
>
>-----Original Message-----
>From: jch...@li...
>[mailto:jch...@li...] On Behalf Of Anubhav
>Kale
>Sent: Tuesday, January 13, 2004 11:41 AM
>To: jch...@li...
>Subject: [jCharts-users] How to load image into a jsp?
>
>
>Hello...
>
>I want to write a jsp. To this page some data will be passed,based on 
>this data I want to draw a piechart. What code do I have to write in the
>
>jsp (to load the image,location of class that creates the image etc)
>
>Thanks
>
>Anubhav
>
>
>
>-------------------------------------------------------
>This SF.net email is sponsored by: Perforce Software.
>Perforce is the Fast Software Configuration Management System offering
>advanced branching capabilities and atomic changes on 50+ platforms.
>Free Eval! http://www.perforce.com/perforce/loadprog.html
>_______________________________________________
>jCharts-users mailing list
>jCh...@li...
>https://lists.sourceforge.net/lists/listinfo/jcharts-users 
>--------------------------------------------------------
> 
>NOTICE: If received in error, please destroy and notify sender.  Sender does not waive confidentiality or privilege, and use is prohibited. 
> 
>
>
>-------------------------------------------------------
>This SF.net email is sponsored by: Perforce Software.
>Perforce is the Fast Software Configuration Management System offering
>advanced branching capabilities and atomic changes on 50+ platforms.
>Free Eval! http://www.perforce.com/perforce/loadprog.html
>_______________________________________________
>jCharts-users mailing list
>jCh...@li...
>https://lists.sourceforge.net/lists/listinfo/jcharts-users
>
>
>  
>

RE: [jCharts-users] How to load image into a jsp?

[Ducret, G. (MSCI) <Gil...@ms...>]

Check the examples, it works fine.

Use the servlet to generate the chart and store it in the session.

From the jsp, call the servlet to load the chart as an image.

It is described in the examples and works very well.

Regards

Gilles

-----Original Message-----
From: jch...@li...
[mailto:jch...@li...] On Behalf Of Anubhav
Kale
Sent: Tuesday, January 13, 2004 11:41 AM
To: jch...@li...
Subject: [jCharts-users] How to load image into a jsp?


Hello...

I want to write a jsp. To this page some data will be passed,based on=20
this data I want to draw a piechart. What code do I have to write in the

jsp (to load the image,location of class that creates the image etc)

Thanks

Anubhav



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Perforce is the Fast Software Configuration Management System offering
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Free Eval! http://www.perforce.com/perforce/loadprog.html
_______________________________________________
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[jCharts-users] How to load image from a jsp

[Anubhav K. <anu...@pe...>]

Hello...

I want to write a jsp. To this page some data will be passed,based on 
this data I want to draw a piechart. What code do I have to write in the 
jsp (to load the image,location of class that creates the image etc)

Thanks

Anubhav

[jCharts-users] How to load image into a jsp?

[Anubhav K. <anu...@pe...>]

Hello...

I want to write a jsp. To this page some data will be passed,based on 
this data I want to draw a piechart. What code do I have to write in the 
jsp (to load the image,location of class that creates the image etc)

Thanks

Anubhav

[jCharts-users] clustered bar chart that displays the percent contribution for ea ch element of the cluster

[Selene V. <SV...@ly...>]

I would like to know if it is possible to create a clustered bar chart that
displays the percent contribution for each element of the cluster? For
example, if there are four bars in a given bar cluster and they are all
equal height, the percent contribution for each bar in the cluster would be
25% - I would like to display this as the value label.
In addition, I would like to say that jcharts is a great product and thanks
for all of your hard work.
Regards,
S. Virk

Re: [jCharts-users] dynamic sql statements & jCharts??

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

I am not sure off the top of my head how to pass arguments to a JasperReport Scriptlet.  You would
have to look on their site.


--- Sean Yee <sy...@dy...> wrote:
> Hi,
>  
> I have recently began to work with jCharts.  I was able to go through all of the tutorials and
> examples with no problems, generating charts with static data.  I am now trying to build a test
> to generate charts based on data passed in from the user via web app and dynamic sql statements.
>  
>  
> This is what I have so far:
>  
> public class JChartsApp
> {
> .
> .
> .    
>     public static String renderGMCharts(HttpServletRequest request, HttpServletResponse
> response) 
>     {
>         String chartName = request.getParameter("chartName");
>         String reportName = "";
>  
>         try
>         {
>    
>              if(chartName.equals("chart"))
>              {
>                  reportName = "jChartsReport.jasper";
>              }
>             
>             ServletContext application = ((ServletContext)
> request.getAttribute("servletContext"));
>             File reportFile = new File(application.getRealPath("/proto/mocuser/reports/" +
> reportName));
>  
>             Map parameters = new HashMap();
>      
>             byte[] bytes;
>   
>             bytes =
>                 JasperManager.runReportToPdf(
>                 reportFile.getPath(),
>                 parameters,
>                 new JREmptyDataSource()
>                 );
>     
>             response.setContentType("application/pdf");
>             response.setContentLength(bytes.length);
>             
>             ServletOutputStream ouputStream = response.getOutputStream();
>             ouputStream.write(bytes, 0, bytes.length);
>             ouputStream.flush();
>             ouputStream.close();   
>       }
>       catch (JRException e)
>       {
>            e.printStackTrace();
>            System.exit(1);
>       }
>       catch (Exception e)
>       {
>            e.printStackTrace();
>            System.exit(1);
>       }
>       return "validCharts";
> }
>         
>  
> jChartsReport.xml (jChartsReport.jasper) contains a reference to this class to generate the
> chart:
>  
>  
> public class JChartsScriptlet extends JRDefaultScriptlet 
> {
>     public void afterReportInit() throws JRScriptletException 
>     {
>  
>         try 
>         {
>  
>             AreaChartProperties areaChartProperties = new AreaChartProperties();
>  
>             double[][] data = {{10, 15, 30, 53}, {6, 30, 10, 21}, {20, 25, 20, 8} };
>             Paint[] paints = {new Color( 0, 255, 0, 100 ), new Color( 255, 0, 0, 100 ), new
> Color( 0, 0, 255, 100 )};
>             String[] legendLabels = {"Games", "Events", "Players" };
>             AxisChartDataSet axisChartDataSet = new AxisChartDataSet( data, legendLabels,
> paints, ChartType.AREA, areaChartProperties );
>  
>             String[] axisLabels = {"January", "March", "May", "June"};
>             DataSeries dataSeries = new DataSeries( axisLabels, "Months", "People", "Popular
> Events" );
>             dataSeries.addIAxisPlotDataSet( axisChartDataSet ); 
>  
>             ChartProperties chartProperties = new ChartProperties();
>             AxisProperties axisProperties = new AxisProperties();
>             LegendProperties legendProperties = new LegendProperties();
>  
>             AxisChart axisChart = new AxisChart( dataSeries, chartProperties, axisProperties,
> legendProperties, 500, 350 );
>  
>             BufferedImage bufferedImage = new BufferedImage( 500, 350,
> BufferedImage.TYPE_INT_RGB );
>  
>             axisChart.setGraphics2D( bufferedImage.createGraphics() );
>             axisChart.render();
>  
>             super.setVariableValue( "ChartImage", bufferedImage );
>       }
>       catch( ChartDataException chartDataException ) 
>       {
>            throw new JRScriptletException( chartDataException );
>       }
>       catch( PropertyException propertyException ) 
>       {
>            throw new JRScriptletException( propertyException );
>       }
>       catch( Exception ex) 
>       {
>            throw new JRScriptletException( ex );
>       }
>  }
>  
>  
> The lines in red are to be replaced with data from a database.  But if I wish to create dynamic
> sql statements via HttpServletRequest which would result in dynamic charts, how can I pass
> things like cityId to this SQL statement??
>  
> (String cityId = request.getParameter("city") - in JChartsApp)
>  
> I would assume that my JDBC connection and query/sql statement reside in JChartsScriptlet class.
>  Is this correct??
>  
>  
> Any help would greatly be appreciated :)
>  
> -sky
> 


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Re: [jCharts-users] gnubie question

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

That demo was a quick hack.  Move the rendering of the chart into the paint() method to get it to
redraw as in:

	/*********************************************************************************
	 *
	 * @param graphics
	 ********************************************************************************/
	public void paint( Graphics graphics )
	{
		try {
			String[] labels = {"BMW", "Audi", "Lexus"};
			String title = "Cars that Own";
			Paint[] paints = {Color.blue, Color.gray, Color.red};
			double[] data = {50d, 30d, 20d};
      	PieChartDataSet pieChartDataSet = new PieChartDataSet( title,
																					 data,
																					 labels,
																					 paints,
																					 this.pieChart2DProperties );

			Dimension dimension= this.panel.getSize();
			PieChart2D pieChart2D = new PieChart2D( pieChartDataSet,
																 this.legendProperties,
																 this.chartProperties,
																 (int) dimension.getWidth(),
																 (int) dimension.getHeight() );
			pieChart2D.setGraphics2D( (Graphics2D) this.panel.getGraphics() );
			pieChart2D.render();
		}
		catch( ChartDataException chartDataException ) {
			chartDataException.printStackTrace();
		}
		catch( PropertyException propertyException ) {
			propertyException.printStackTrace();
		}
	}



--- "J. David Boyd" <da...@ts...> wrote:
> I'm running the demo java code from jChart-0.7.5, and it shows the pie 
> chart fine. (Windows XP, jdk 1.4.2_0 )
> 
> However, if I minimize the window, then bring it back, the view is empty.
> 
> Am I missing something obvious?  Why doesn't the window redraw with the 
> pie chart still in it?
> 
> Dave
> 
> 
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[jCharts-users] dynamic sql statements & jCharts??

[Sean Y. <sy...@dy...>]

Hi,
=20
I have recently began to work with jCharts.  I was able to go through =
all of the tutorials and examples with no problems, generating charts =
with static data.  I am now trying to build a test to generate charts =
based on data passed in from the user via web app and dynamic sql =
statements. =20
=20
This is what I have so far:
=20
public class JChartsApp
{
.
.
.   =20
    public static String renderGMCharts(HttpServletRequest request, =
HttpServletResponse response)=20
    {
        String chartName =3D request.getParameter("chartName");
        String reportName =3D "";
=20
        try
        {
  =20
             if(chartName.equals("chart"))
             {
                 reportName =3D "jChartsReport.jasper";
             }
           =20
            ServletContext application =3D ((ServletContext) =
request.getAttribute("servletContext"));
            File reportFile =3D new =
File(application.getRealPath("/proto/mocuser/reports/" + reportName));
=20
            Map parameters =3D new HashMap();
    =20
            byte[] bytes;
 =20
            bytes =3D
                JasperManager.runReportToPdf(
                reportFile.getPath(),
                parameters,
                new JREmptyDataSource()
                );
   =20
            response.setContentType("application/pdf");
            response.setContentLength(bytes.length);
           =20
            ServletOutputStream ouputStream =3D =
response.getOutputStream();
            ouputStream.write(bytes, 0, bytes.length);
            ouputStream.flush();
            ouputStream.close();  =20
      }
      catch (JRException e)
      {
           e.printStackTrace();
           System.exit(1);
      }
      catch (Exception e)
      {
           e.printStackTrace();
           System.exit(1);
      }
      return "validCharts";
}
       =20
=20
jChartsReport.xml (jChartsReport.jasper) contains a reference to this =
class to generate the chart:
=20
=20
public class JChartsScriptlet extends JRDefaultScriptlet=20
{
    public void afterReportInit() throws JRScriptletException=20
    {
=20
        try=20
        {
=20
            AreaChartProperties areaChartProperties =3D new =
AreaChartProperties();
=20
            double[][] data =3D {{10, 15, 30, 53}, {6, 30, 10, 21}, {20, =
25, 20, 8} };
            Paint[] paints =3D {new Color( 0, 255, 0, 100 ), new Color( =
255, 0, 0, 100 ), new Color( 0, 0, 255, 100 )};
            String[] legendLabels =3D {"Games", "Events", "Players" };
            AxisChartDataSet axisChartDataSet =3D new AxisChartDataSet( =
data, legendLabels, paints, ChartType.AREA, areaChartProperties );
=20
            String[] axisLabels =3D {"January", "March", "May", "June"};
            DataSeries dataSeries =3D new DataSeries( axisLabels, =
"Months", "People", "Popular Events" );
            dataSeries.addIAxisPlotDataSet( axisChartDataSet );=20
=20
            ChartProperties chartProperties =3D new ChartProperties();
            AxisProperties axisProperties =3D new AxisProperties();
            LegendProperties legendProperties =3D new =
LegendProperties();
=20
            AxisChart axisChart =3D new AxisChart( dataSeries, =
chartProperties, axisProperties, legendProperties, 500, 350 );
=20
            BufferedImage bufferedImage =3D new BufferedImage( 500, 350, =
BufferedImage.TYPE_INT_RGB );
=20
            axisChart.setGraphics2D( bufferedImage.createGraphics() );
            axisChart.render();
=20
            super.setVariableValue( "ChartImage", bufferedImage );
      }
      catch( ChartDataException chartDataException )=20
      {
           throw new JRScriptletException( chartDataException );
      }
      catch( PropertyException propertyException )=20
      {
           throw new JRScriptletException( propertyException );
      }
      catch( Exception ex)=20
      {
           throw new JRScriptletException( ex );
      }
 }
=20
=20
The lines in red are to be replaced with data from a database.  But if I =
wish to create dynamic sql statements via HttpServletRequest which would =
result in dynamic charts, how can I pass things like cityId to this SQL =
statement??
=20
(String cityId =3D request.getParameter("city") - in JChartsApp)
=20
I would assume that my JDBC connection and query/sql statement reside in =
JChartsScriptlet class.  Is this correct??
=20
=20
Any help would greatly be appreciated :)
=20
-sky

[jCharts-users] gnubie question

[J. D. B. <da...@ts...>]

I'm running the demo java code from jChart-0.7.5, and it shows the pie 
chart fine. (Windows XP, jdk 1.4.2_0 )

However, if I minimize the window, then bring it back, the view is empty.

Am I missing something obvious?  Why doesn't the window redraw with the 
pie chart still in it?

Dave

Re: [jCharts-users] Jchart and struts

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

No, it is not possible in a single request.  You could do it in Struts, simply have two Actions.


--- damien guinan <gui...@ho...> wrote:
> Yes, but the example i refer to and in your documentation makes two trips to
> servlets.
> This will not work in struts, you make a request process it and display it
> !! Yes you are
> write about the performance tradeoff i was merely suggesting an alternative.
> I need to use the
> example that incorporates both Jsp and the image so what is the solution ?
> Is there a way
> to make one trip do all the encoding and display to the Jsp page ?
> 
> ----- Original Message ----- 
> From: "Nathaniel G. Auvil" <nat...@ya...>
> To: <jch...@li...>
> Sent: Monday, January 05, 2004 2:14 PM
> Subject: Re: [jCharts-users] Jchart and struts
> 
> 
> >
> > I would assume the performance hit for writing to disk would be greater
> than executing a servlet.
> > Struts does not allow redirection in the middle of a request as the
> request has already been
> > committed. A http request has a single mime type associated with it; it
> can not be of html and png
> > at the same time.
> >
> >
> > --- damien guinan <gui...@ho...> wrote:
> > > I did, the problem is that the jsp make two strips to servelts !! Is
> there a
> > > way of saving the chart as an image to some temporary folder and reading
> it
> > > back in afterwards ? Struts doesn't allow the redirection to take in the
> > > middle of the example !
> > >
> > >
> > > ----- Original Message ----- 
> > > From: "Nathaniel G. Auvil" <nat...@ya...>
> > > To: <jch...@li...>
> > > Sent: Saturday, January 03, 2004 1:11 AM
> > > Subject: Re: [jCharts-users] Jchart and struts
> > >
> > >
> > > >
> > > > Did you take a look at the source for the jsp and Servlet under the
> demo
> > > folder?
> > > >
> > > >
> > > > --- damien guinan <gui...@ho...> wrote:
> > > > > I am having trouble integrating Struts and Jchart, i placed the
> > > > > example,"HorizontalBarImageMapServlet" into a the ActionPerform
> method
> > > in a struts action class,
> > > > > but when i access the jsp that is calling the action it gives an
> error
> > > in the jsp page with the
> > > > > iterator: Iterator iterator = imageMap.getIterator(); The reason i
> > > wanted to use this is because
> > > > > i wanted to save the image and attributes in the session and read
> them
> > > back out? Also could you
> > > > > tell me the name of the image that gets saved in the session in this
> > > example ?
> > > > >
> > > > > If you can get me an example i would really appreciate it :-)
> > > >
> > > >
> > > > __________________________________
> > > > Do you Yahoo!?
> > > > Find out what made the Top Yahoo! Searches of 2003
> > > > http://search.yahoo.com/top2003
> > > >
> > > >
> > > > -------------------------------------------------------
> > > > This SF.net email is sponsored by: IBM Linux Tutorials.
> > > > Become an expert in LINUX or just sharpen your skills.  Sign up for
> IBM's
> > > > Free Linux Tutorials.  Learn everything from the bash shell to sys
> admin.
> > > > Click now! http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click
> > > > _______________________________________________
> > > > jCharts-users mailing list
> > > > jCh...@li...
> > > > https://lists.sourceforge.net/lists/listinfo/jcharts-users
> > > >
> > >
> > >
> > > -------------------------------------------------------
> > > This SF.net email is sponsored by: IBM Linux Tutorials.
> > > Become an expert in LINUX or just sharpen your skills.  Sign up for
> IBM's
> > > Free Linux Tutorials.  Learn everything from the bash shell to sys
> admin.
> > > Click now! http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click
> > > _______________________________________________
> > > jCharts-users mailing list
> > > jCh...@li...
> > > https://lists.sourceforge.net/lists/listinfo/jcharts-users
> >
> >
> > __________________________________
> > Do you Yahoo!?
> > Find out what made the Top Yahoo! Searches of 2003
> > http://search.yahoo.com/top2003
> >
> >
> > -------------------------------------------------------
> > This SF.net email is sponsored by: IBM Linux Tutorials.
> > Become an expert in LINUX or just sharpen your skills.  Sign up for IBM's
> > Free Linux Tutorials.  Learn everything from the bash shell to sys admin.
> > Click now! http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click
> > _______________________________________________
> > jCharts-users mailing list
> > jCh...@li...
> > https://lists.sourceforge.net/lists/listinfo/jcharts-users
> >
> 
> 
> -------------------------------------------------------
> This SF.net email is sponsored by: IBM Linux Tutorials.
> Become an expert in LINUX or just sharpen your skills.  Sign up for IBM's
> Free Linux Tutorials.  Learn everything from the bash shell to sys admin.
> Click now! http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click
> _______________________________________________
> jCharts-users mailing list
> jCh...@li...
> https://lists.sourceforge.net/lists/listinfo/jcharts-users


__________________________________
Do you Yahoo!?
Find out what made the Top Yahoo! Searches of 2003
http://search.yahoo.com/top2003

Re: [jCharts-users] Jchart and struts

[damien g. <gui...@ho...>]

Yes, but the example i refer to and in your documentation makes two trips to
servlets.
This will not work in struts, you make a request process it and display it
!! Yes you are
write about the performance tradeoff i was merely suggesting an alternative.
I need to use the
example that incorporates both Jsp and the image so what is the solution ?
Is there a way
to make one trip do all the encoding and display to the Jsp page ?

----- Original Message ----- 
From: "Nathaniel G. Auvil" <nat...@ya...>
To: <jch...@li...>
Sent: Monday, January 05, 2004 2:14 PM
Subject: Re: [jCharts-users] Jchart and struts


>
> I would assume the performance hit for writing to disk would be greater
than executing a servlet.
> Struts does not allow redirection in the middle of a request as the
request has already been
> committed. A http request has a single mime type associated with it; it
can not be of html and png
> at the same time.
>
>
> --- damien guinan <gui...@ho...> wrote:
> > I did, the problem is that the jsp make two strips to servelts !! Is
there a
> > way of saving the chart as an image to some temporary folder and reading
it
> > back in afterwards ? Struts doesn't allow the redirection to take in the
> > middle of the example !
> >
> >
> > ----- Original Message ----- 
> > From: "Nathaniel G. Auvil" <nat...@ya...>
> > To: <jch...@li...>
> > Sent: Saturday, January 03, 2004 1:11 AM
> > Subject: Re: [jCharts-users] Jchart and struts
> >
> >
> > >
> > > Did you take a look at the source for the jsp and Servlet under the
demo
> > folder?
> > >
> > >
> > > --- damien guinan <gui...@ho...> wrote:
> > > > I am having trouble integrating Struts and Jchart, i placed the
> > > > example,"HorizontalBarImageMapServlet" into a the ActionPerform
method
> > in a struts action class,
> > > > but when i access the jsp that is calling the action it gives an
error
> > in the jsp page with the
> > > > iterator: Iterator iterator = imageMap.getIterator(); The reason i
> > wanted to use this is because
> > > > i wanted to save the image and attributes in the session and read
them
> > back out? Also could you
> > > > tell me the name of the image that gets saved in the session in this
> > example ?
> > > >
> > > > If you can get me an example i would really appreciate it :-)
> > >
> > >
> > > __________________________________
> > > Do you Yahoo!?
> > > Find out what made the Top Yahoo! Searches of 2003
> > > http://search.yahoo.com/top2003
> > >
> > >
> > > -------------------------------------------------------
> > > This SF.net email is sponsored by: IBM Linux Tutorials.
> > > Become an expert in LINUX or just sharpen your skills.  Sign up for
IBM's
> > > Free Linux Tutorials.  Learn everything from the bash shell to sys
admin.
> > > Click now! http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click
> > > _______________________________________________
> > > jCharts-users mailing list
> > > jCh...@li...
> > > https://lists.sourceforge.net/lists/listinfo/jcharts-users
> > >
> >
> >
> > -------------------------------------------------------
> > This SF.net email is sponsored by: IBM Linux Tutorials.
> > Become an expert in LINUX or just sharpen your skills.  Sign up for
IBM's
> > Free Linux Tutorials.  Learn everything from the bash shell to sys
admin.
> > Click now! http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click
> > _______________________________________________
> > jCharts-users mailing list
> > jCh...@li...
> > https://lists.sourceforge.net/lists/listinfo/jcharts-users
>
>
> __________________________________
> Do you Yahoo!?
> Find out what made the Top Yahoo! Searches of 2003
> http://search.yahoo.com/top2003
>
>
> -------------------------------------------------------
> This SF.net email is sponsored by: IBM Linux Tutorials.
> Become an expert in LINUX or just sharpen your skills.  Sign up for IBM's
> Free Linux Tutorials.  Learn everything from the bash shell to sys admin.
> Click now! http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click
> _______________________________________________
> jCharts-users mailing list
> jCh...@li...
> https://lists.sourceforge.net/lists/listinfo/jcharts-users
>

Re: [jCharts-users] Jchart and struts

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

I would assume the performance hit for writing to disk would be greater than executing a servlet.
Struts does not allow redirection in the middle of a request as the request has already been
committed. A http request has a single mime type associated with it; it can not be of html and png
at the same time.


--- damien guinan <gui...@ho...> wrote:
> I did, the problem is that the jsp make two strips to servelts !! Is there a
> way of saving the chart as an image to some temporary folder and reading it
> back in afterwards ? Struts doesn't allow the redirection to take in the
> middle of the example !
> 
> 
> ----- Original Message ----- 
> From: "Nathaniel G. Auvil" <nat...@ya...>
> To: <jch...@li...>
> Sent: Saturday, January 03, 2004 1:11 AM
> Subject: Re: [jCharts-users] Jchart and struts
> 
> 
> >
> > Did you take a look at the source for the jsp and Servlet under the demo
> folder?
> >
> >
> > --- damien guinan <gui...@ho...> wrote:
> > > I am having trouble integrating Struts and Jchart, i placed the
> > > example,"HorizontalBarImageMapServlet" into a the ActionPerform method
> in a struts action class,
> > > but when i access the jsp that is calling the action it gives an error
> in the jsp page with the
> > > iterator: Iterator iterator = imageMap.getIterator(); The reason i
> wanted to use this is because
> > > i wanted to save the image and attributes in the session and read them
> back out? Also could you
> > > tell me the name of the image that gets saved in the session in this
> example ?
> > >
> > > If you can get me an example i would really appreciate it :-)
> >
> >
> > __________________________________
> > Do you Yahoo!?
> > Find out what made the Top Yahoo! Searches of 2003
> > http://search.yahoo.com/top2003
> >
> >
> > -------------------------------------------------------
> > This SF.net email is sponsored by: IBM Linux Tutorials.
> > Become an expert in LINUX or just sharpen your skills.  Sign up for IBM's
> > Free Linux Tutorials.  Learn everything from the bash shell to sys admin.
> > Click now! http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click
> > _______________________________________________
> > jCharts-users mailing list
> > jCh...@li...
> > https://lists.sourceforge.net/lists/listinfo/jcharts-users
> >
> 
> 
> -------------------------------------------------------
> This SF.net email is sponsored by: IBM Linux Tutorials.
> Become an expert in LINUX or just sharpen your skills.  Sign up for IBM's
> Free Linux Tutorials.  Learn everything from the bash shell to sys admin.
> Click now! http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click
> _______________________________________________
> jCharts-users mailing list
> jCh...@li...
> https://lists.sourceforge.net/lists/listinfo/jcharts-users


__________________________________
Do you Yahoo!?
Find out what made the Top Yahoo! Searches of 2003
http://search.yahoo.com/top2003

Re: [jCharts-users] Jchart and struts

[damien g. <gui...@ho...>]

I did, the problem is that the jsp make two strips to servelts !! Is there a
way of saving the chart as an image to some temporary folder and reading it
back in afterwards ? Struts doesn't allow the redirection to take in the
middle of the example !


----- Original Message ----- 
From: "Nathaniel G. Auvil" <nat...@ya...>
To: <jch...@li...>
Sent: Saturday, January 03, 2004 1:11 AM
Subject: Re: [jCharts-users] Jchart and struts


>
> Did you take a look at the source for the jsp and Servlet under the demo
folder?
>
>
> --- damien guinan <gui...@ho...> wrote:
> > I am having trouble integrating Struts and Jchart, i placed the
> > example,"HorizontalBarImageMapServlet" into a the ActionPerform method
in a struts action class,
> > but when i access the jsp that is calling the action it gives an error
in the jsp page with the
> > iterator: Iterator iterator = imageMap.getIterator(); The reason i
wanted to use this is because
> > i wanted to save the image and attributes in the session and read them
back out? Also could you
> > tell me the name of the image that gets saved in the session in this
example ?
> >
> > If you can get me an example i would really appreciate it :-)
>
>
> __________________________________
> Do you Yahoo!?
> Find out what made the Top Yahoo! Searches of 2003
> http://search.yahoo.com/top2003
>
>
> -------------------------------------------------------
> This SF.net email is sponsored by: IBM Linux Tutorials.
> Become an expert in LINUX or just sharpen your skills.  Sign up for IBM's
> Free Linux Tutorials.  Learn everything from the bash shell to sys admin.
> Click now! http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click
> _______________________________________________
> jCharts-users mailing list
> jCh...@li...
> https://lists.sourceforge.net/lists/listinfo/jcharts-users
>

Re: [jCharts-users] X11/UNIX problem again

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

I don't know.  Are you sure the code below is what is executing...nothing is cached, etc...?

Can you try a newer jdk?  Perhaps look to see if anyone else has this problem on the java bug
lists?



--- Ashley Towers <at...@uk...> wrote:
> Im using JDK 1.4.01
> 
> and im using jCharts 0.7.4
> 
> Thanks
> Ash
> 
> 
> ----- Original Message ----- 
> From: "Nathaniel G. Auvil" <nat...@ya...>
> To: <jch...@li...>
> Sent: Saturday, January 03, 2004 2:03 PM
> Subject: Re: [jCharts-users] X11/UNIX problem again
> 
> 
> >
> > what jdk are you using?
> >
> >
> > --- Ashley Towers <at...@uk...> wrote:
> > > Im having problems with this X11 (Unix based problem). Basically i got
> the code working on
> > > windows but not solaris, i've tried the
> > >
> > >  try{  System.setProperty("java.awt.headless","true");}catch( Throwable
> throwable ){}
> > >
> > > fix but it doesn't seem to be working, im not sure if i've got it in the
> wrong place or if i've
> > > done it wrong or what? Its a servlet running on Sun One WebServer so i
> can't run it from the
> > > command line and thus add the -D<thingy>
> > >
> > > any one any ideas???
> > >
> > >
> > > i've got the code:
> > >
> > > import org.jCharts.chartData.ChartDataException;
> > > import org.jCharts.chartData.PieChartDataSet;
> > > import org.jCharts.encoders.ServletEncoderHelper;
> > > import org.jCharts.nonAxisChart.PieChart2D;
> > > import org.jCharts.properties.*;
> > >
> > > import javax.servlet.ServletException;
> > > import javax.servlet.http.*;
> > > import java.awt.*;
> > > import java.io.IOException;
> > >
> > >
> > > public class PieChart2DServlet extends HttpServlet
> > > {
> > >  //---all of my pie charts serviced by this Servlet will have the same
> properties.
> > >  private PieChart2DProperties properties;
> > >  private LegendProperties legendProperties;
> > >  private ChartProperties chartProperties;
> > >
> > >  private int width = 550;
> > >  private int height = 350;
> > >
> > >
> > >
> /***************************************************************************
> *******************
> > >   *
> > >
> > >
> ****************************************************************************
> ******************/
> > >  public void init()
> > >  {
> > >   // Solaris code to prevent X11 Server errors
> > >                 try{
> System.setProperty("java.awt.headless","true");}catch( Throwable throwable
> > > ){}
> > >
> > >                 //---all charts of this type of pie chart are going to
> share the same
> > > properties.
> > >   this.properties = new PieChart2DProperties();
> > >
> > >   this.legendProperties = new LegendProperties();
> > >   this.legendProperties.setNumColumns( 2 );
> > >   this.legendProperties.setPlacement( LegendProperties.RIGHT );
> > >
> > >   this.chartProperties = new ChartProperties();
> > >  }
> > >
> > >
> > >
> /***************************************************************************
> *******************
> > >   *
> > >
> > >
> ****************************************************************************
> ******************/
> > >  public void service( HttpServletRequest req, HttpServletResponse
> response ) throws
> > > ServletException, IOException
> > >  {
> > >
> > >
> > >
> > >
> > >                 try
> > >   {
> > >    PieChart2D pieChart2D = new PieChart2D( this.getData(req),
> this.legendProperties,
> > > this.chartProperties, this.width, this.height );
> > >    ServletEncoderHelper.encodeJPEG13( pieChart2D, 1.0f, response );
> > >   }
> > >   catch( Throwable throwable )
> > >   {
> > >    //HACK do your error handling here...
> > >    throwable.printStackTrace();
> > >   }
> > >  }
> > >
> > >
> > >
> /***************************************************************************
> ***************
> > >   * Returns a Tests a 'real' data set and usage.
> > >   *
> > >   * @throws ChartDataException
> > >
> ****************************************************************************
> **************/
> > >  private PieChartDataSet getData(HttpServletRequest req) throws
> ChartDataException
> > >  {
> > >
> > >                 String []y = req.getParameterValues("y");
> > >                 // Defines the data
> > >   double[] data = new double[y.length];
> > >
> > >                 for (int i =0; i < y.length; i++){
> > >                     Double d = (Double) Double.valueOf(y[i]);
> > >                     data[i] = (double) d.doubleValue();
> > >                 }
> > >
> > >                 // Defines the paints
> > >                 Paint[] paints = new Paint[data.length];
> > >                 for (int i = 0; i < paints.length; i++){
> > >                     paints[i] = possible_paints[i];
> > >                 }
> > >
> > >                 // Defines labels for each value
> > >                 String[] labels = req.getParameterValues("x");
> > >
> > >                 // Defines the title
> > >                 String title = "";
> > >                 title = req.getParameter("title");
> > >
> > >   return new PieChartDataSet(title, data, labels, paints,
> this.properties );
> > >  }
> > >
> > >         // Defines the possible_paints MAX 9
> > >         private Paint[] possible_paints = new Paint[]{Color.blue,
> > >                                                         Color.red,
> > >                                                         Color.green,
> > >                                                         Color.yellow,
> > >                                                         Color.white,
> > >                                                         Color.gray,
> > >                                                         Color.orange,
> > >                                                         Color.pink,
> > >                                                         Color.blue,
> > >                                                         Color.red,
> > >                                                         Color.green,
> > >                                                         Color.yellow,
> > >                                                         Color.white,
> > >                                                         Color.gray,
> > >                                                         Color.orange,
> > >                                                         Color.pink,
> > >                                                         Color.blue};
> > > }
> > >
> > >
> > >
> > >
> > >
> > > im getting the errors:
> > >
> > > [19/Dec/2003:08:12:18] failure (13591):  Internal error: Unexpected
> error condition thrown
> > > (unknown exception,no description), stack: java.lang.InternalError:
> Can't connect to X11 window
> > > server using ':0.0' as the value of the DISPLAY variable.
> > >
> > >   at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
> > >
> > >   at
> sun.awt.X11GraphicsEnvironment.<clinit>(X11GraphicsEnvironment.java:125)
> > >
> > >   at java.lang.Class.forName0(Native Method)
> > >
> > >   at java.lang.Class.forName(Class.java:140)
> > >
> > >   at
> java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment
> .java:62)
> > >
> > >   at java.awt.Font.initializeFont(Font.java:303)
> > >
> > >   at java.awt.Font.<init>(Font.java:339)
> > >
> > >   at org.jCharts.properties.util.ChartFont.<clinit>(Unknown Source)
> > >
> > >   at org.jCharts.properties.PieChart2DProperties.<init>(Unknown Source)
> > >
> > >   at PieChart2DServlet.init(PieChart2DServlet.java:30)
> > >
> > >   at javax.servlet.GenericServlet.init(GenericServlet.java:258)
> > >
> > >   at
> com.iplanet.server.http.servlet.NSServletEntity.load(NSServletEntity.java:40
> 5)
> > >
> > >   at
> com.iplanet.server.http.servlet.NSServletEntity.update(NSServletEntity.java:
> 173)
> > >
> > >   at
> com.iplanet.server.http.servlet.NSServletRunner.Service(NSServletRunner.java
> :416)
> > >
> > >
> > > [02/Jan/2004:10:31:45] failure (23997):  Internal error: Unexpected
> error condition thrown
> > > (unknown exception,no description), stack:
> java.lang.NoClassDefFoundError:
> > > sun/io/ByteToCharEUC_KR
> > >
> > >   at sun.awt.font.NativeFontWrapper.registerFonts(Native Method)
> > >
> > >   at
> sun.java2d.SunGraphicsEnvironment.addPathFonts(SunGraphicsEnvironment.java:7
> 36)
> > >
> > >   at
> sun.java2d.SunGraphicsEnvironment.registerFonts(SunGraphicsEnvironment.java:
> 587)
> > >
> > >   at
> sun.java2d.SunGraphicsEnvironment.access$100(SunGraphicsEnvironment.java:49)
> > >
> > >   at
> sun.java2d.SunGraphicsEnvironment$2.run(SunGraphicsEnvironment.java:209)
> > >
> > >   at java.security.AccessController.doPrivileged(Native Method)
> > >
> > >   at
> sun.java2d.SunGraphicsEnvironment.loadFonts(SunGraphicsEnvironment.java:203)
> > >
> > >   at
> sun.java2d.SunGraphicsEnvironment.initTerminalNames(SunGraphicsEnvironment.j
> ava:1029)
> > >
> > >   at
> sun.java2d.SunGraphicsEnvironment.initCompositeFonts(SunGraphicsEnvironment.
> java:795)
> > >
> > >   at
> sun.java2d.SunGraphicsEnvironment.access$200(SunGraphicsEnvironment.java:49)
> > >
> > >   at
> sun.java2d.SunGraphicsEnvironment$1.run(SunGraphicsEnvironment.java:160)
> > >
> > >   at java.security.AccessController.doPrivileged(Native Method)
> > >
> > >   at
> sun.java2d.SunGraphicsEnvironment.<init>(SunGraphicsEnvironment.java:78)
> > >
> > >   at
> sun.awt.X11GraphicsEnvironment.<init>(X11GraphicsEnvironment.java:150)
> > >
> > >   at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
> Method)
> > >
> > >   at
> > >
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAcces
> sorImpl.java:39)
> > >
> > >   at
> > >
> >
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstruc
> torAccessorImpl.java:27)
> > >
> > >
> > >   at java.lang.reflect.Constructor.newInstance(Constructor.java:274)
> > >
> > >   at java.lang.Class.newInstance0(Class.java:306)
> > >
> > >   at java.lang.Class.newInstance(Class.java:259)
> > >
> > >   at
> java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment
> .java:62)
> > >
> > >   at java.awt.Font.initializeFont(Font.java:303)
> > >
> > >   at java.awt.Font.<init>(Font.java:339)
> > >
> > >   at org.jCharts.properties.util.ChartFont.<clinit>(Unknown Source)
> > >
> > >   at org.jCharts.properties.PieChart2DProperties.<init>(Unknown Source)
> > >
> > >   at PieChart2DServlet.init(PieChart2DServlet.java:30)
> > >
> > >   at javax.servlet.GenericServlet.init(GenericServlet.java:258)
> > >
> > >   at
> com.iplanet.server.http.servlet.NSServletEntity.load(NSServletEntity.java:40
> 5)
> > >
> > >   at
> com.iplanet.server.http.servlet.NSServletEntity.update(NSServletEntity.java:
> 173)
> > >
> > >   at
> com.iplanet.server.http.servlet.NSServletRunner.Service(NSServletRunner.java
> :416)
> >
> >
> > __________________________________
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> >
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> >
> 
> 
> 
> -------------------------------------------------------
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