jcharts-users — For users of jCharts

Re: [jCharts-users] value label rendered for line charts

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

The code has not been enabled for line charts yet.  It is in the plans for the next release for
line charts, point charts, and XY Plots.


--- Marcin Gryszkalis <da...@to...> wrote:
> Hi
> It seems that it's not supported - is there any reason
> for that, or just it's waiting to be implemented?
> regards
> 
> 
> 
> 
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[jCharts-users] value label rendered for line charts

[Marcin G. <da...@to...>]

Hi
It seems that it's not supported - is there any reason
for that, or just it's waiting to be implemented?
regards

Re: [jCharts-users] NullPointerException at XAxis.render(XAxis.java:406)

[Marcin G. <da...@to...>]

Ok, now I understand

You wrote:
>>>The problem you are having is that you are 
 >>>passing a DataAxisProperties Object for the y-axis
                                                ^^^^^^
That's why I didn't understand, should be x-axis, right?

regards
Marcin

[jCharts-users] Re: Struts

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

--- Java <jav...@us...> wrote:
> 
> Hi Nathaniel
> 
> I would like to know if you can create multipale charts onto a 
> jsp page using struts. I have once read a mail where you said
> to put it in the class that extends Action class. 

Yes, this is one way you can do it. Place multiple <img> tags in your jsp and call different
Actions or call the same Action and pass some sort of key so you know what chart to get.


> I would also like to join your project but aren't sure how to join. I have a 
> sourceforge user and password.

I would suggest first subscribing to all the mail lists, and post some things you would like to
see in jcharts, or changes to be made.

Also, for best results, post to the jcharts user mail list in case I am not around.






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Re: [jCharts-users] NullPointerException at XAxis.render(XAxis.java:406)

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

--- Marcin Gryszkalis <da...@to...> wrote:
> On 2003-06-26 04:28, Nathaniel G. Auvil wrote:
> 
> > The problem you are having is that you are passing a DataAxisProperties Object for the y-axis
> > properties when this should be a LabelAxisProperties Object.
> > 
> > try this for your xAxisProperties:
> > 
> > LabelAxisProperties xAxisProperties = new LabelAxisProperties();
> 
> but, DataAxisProperies directly extends LabelAxisProperties...

Yeah, but the logic uses the type of AxisProperties in determining how to draw the Axis.


> if I change it do LabelAxisProperties, how can I
> access 'round-to-nearest' property (which is defined in DataAxisProperties)?

Your data is plotted against the y-axis so you would place your rounding code there. The labels
are on the x-axis so rounding does not apply there.



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Re: [jCharts-users] NullPointerException at XAxis.render(XAxis.java:406)

[Marcin G. <da...@to...>]

On 2003-06-26 04:28, Nathaniel G. Auvil wrote:

> The problem you are having is that you are passing a DataAxisProperties Object for the y-axis
> properties when this should be a LabelAxisProperties Object.
> 
> try this for your xAxisProperties:
> 
> LabelAxisProperties xAxisProperties = new LabelAxisProperties();

but, DataAxisProperies directly extends LabelAxisProperties...
Anyway, the code is:

DataAxisProperties yAxisProperties = new DataAxisProperties();
yAxisProperties.setAxisTitleChartFont(ft_axis);
yAxisProperties.setScaleChartFont(ft_labels);
yAxisProperties.setRoundToNearest(0);
AxisProperties axisProperties = new AxisProperties(xAxisProperties, yAxisProperties);

if I change it do LabelAxisProperties, how can I
access 'round-to-nearest' property (which is defined in DataAxisProperties)?

regards
Marcin

Re: [jCharts-users] NullPointerException at XAxis.render(XAxis.java:406)

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

The problem you are having is that you are passing a DataAxisProperties Object for the y-axis
properties when this should be a LabelAxisProperties Object.


try this for your xAxisProperties:

LabelAxisProperties xAxisProperties = new LabelAxisProperties();




--- Marcin Gryszkalis <da...@to...> wrote:
> Hi, I use jCharts 0.7.3
> 
> I get this:
> 23:40:56,045 ERROR [STDERR] java.lang.NullPointerException
> 23:40:56,055 ERROR [STDERR]     at org.jCharts.axisChart.axis.XAxis.render(XAxis.java:406)
> 23:40:56,055 ERROR [STDERR]     at
> org.jCharts.axisChart.AxisChart.renderChart(AxisChart.java:442)
> 23:40:56,055 ERROR [STDERR]     at org.jCharts.Chart.render(Chart.java:169)
> 23:40:56,055 ERROR [STDERR]     at
> org.jCharts.encoders.BinaryEncoderUtil.render(BinaryEncoderUtil.java:90)
> 23:40:56,065 ERROR [STDERR]     at org.jCharts.encoders.PNGEncoder.encode(PNGEncoder.java:91)
> 23:40:56,085 ERROR [STDERR]     at extranet.ChartServlet.performTask(ChartServlet.java:341)
> 
> The code from my ChartServlet that generates the chart is below,
> What I am doing wrong?
> regards
> Marcin
> 
> ===============
> String[] xAxisLabels= { "I","II","III","IV","V","VI","VII","VIII","IX","X","XI","XII" };
> out = response.getOutputStream();
> 
> java.util.ResourceBundle txts = java.util.ResourceBundle.getBundle("charts",new
> Locale(language));
> 
> String year  = getParameter(request,"Year");
> if (year == null) year="2002";
> 
> Collection v = user.getNumbersByYear(kid, new Long(year));
> Iterator it = v.iterator();
> 
> double[][] data = new double[1][12];
> for (int i=0; i<12; i++)
> {
> 	double d = ((Long)it.next()).doubleValue();
> 	data[0][i] = d;
> }
> String xAxisTitle = fix(txts.getString("CHART1_XAXIS"));
> String yAxisTitle = fix(txts.getString("CHART1_YAXIS"));
> 
> Object[] arg = { year };
> String title = fix(MessageFormat.format(txts.getString("CHART1_TITLE"), arg));
> 
> DataSeries dataSeries = new DataSeries( xAxisLabels, xAxisTitle, yAxisTitle, title );
> 
> String[] legendLabels = { fix(txts.getString("CHART1_LEGEND")) };
> 
> Paint[] paints={ new GradientPaint(0,0,new Color(255,213,83,150),0,350,new Color(243,116,0,200))
> };
> BarChartProperties barChartProperties = new BarChartProperties();
> 
> ValueLabelRenderer valueLabelRenderer = new ValueLabelRenderer( false, false, false, -1 );
> valueLabelRenderer.setValueLabelPosition( ValueLabelPosition.ON_TOP );
> valueLabelRenderer.useVerticalLabels(false);
> barChartProperties.addPostRenderEventListener( valueLabelRenderer );
> 
> AxisChartDataSet axisChartDataSet = new AxisChartDataSet(data, legendLabels, paints,
> ChartType.BAR, barChartProperties);
> dataSeries.addIAxisPlotDataSet(axisChartDataSet);
> ChartProperties chartProperties = new ChartProperties();
> 
> DataAxisProperties xAxisProperties = new DataAxisProperties();
> xAxisProperties.setAxisTitleChartFont(ft_axis);
> xAxisProperties.setScaleChartFont(ft_labels);
> 
> DataAxisProperties yAxisProperties = new DataAxisProperties();
> yAxisProperties.setAxisTitleChartFont(ft_axis);
> yAxisProperties.setScaleChartFont(ft_labels);
> yAxisProperties.setRoundToNearest(0);
> 
> AxisProperties axisProperties = new AxisProperties(xAxisProperties, yAxisProperties);
> LegendProperties legendProperties = new LegendProperties();
> 
> chartProperties.setTitleFont(ft_title);
> legendProperties.setFont(ft_base_);
> 
> axisProperties.setBackgroundPaint(new GradientPaint(0,0,new Color(255,255,255),0,300,new
> Color(167,213,255)));
> AxisChart axisChart= new AxisChart(
> dataSeries,
> chartProperties,
> axisProperties,
> null, //legendProperties,
> 548, 350 ); // wymiary wykresu
> 
> response.setContentType("image/png");
> PNGEncoder.encode(axisChart, out);
> 
> 
> 
> 
> 
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[jCharts-users] NullPointerException at XAxis.render(XAxis.java:406)

[Marcin G. <da...@to...>]

Hi, I use jCharts 0.7.3

I get this:
23:40:56,045 ERROR [STDERR] java.lang.NullPointerException
23:40:56,055 ERROR [STDERR]     at org.jCharts.axisChart.axis.XAxis.render(XAxis.java:406)
23:40:56,055 ERROR [STDERR]     at org.jCharts.axisChart.AxisChart.renderChart(AxisChart.java:442)
23:40:56,055 ERROR [STDERR]     at org.jCharts.Chart.render(Chart.java:169)
23:40:56,055 ERROR [STDERR]     at org.jCharts.encoders.BinaryEncoderUtil.render(BinaryEncoderUtil.java:90)
23:40:56,065 ERROR [STDERR]     at org.jCharts.encoders.PNGEncoder.encode(PNGEncoder.java:91)
23:40:56,085 ERROR [STDERR]     at extranet.ChartServlet.performTask(ChartServlet.java:341)

The code from my ChartServlet that generates the chart is below,
What I am doing wrong?
regards
Marcin

===============
String[] xAxisLabels= { "I","II","III","IV","V","VI","VII","VIII","IX","X","XI","XII" };
out = response.getOutputStream();

java.util.ResourceBundle txts = java.util.ResourceBundle.getBundle("charts",new Locale(language));

String year  = getParameter(request,"Year");
if (year == null) year="2002";

Collection v = user.getNumbersByYear(kid, new Long(year));
Iterator it = v.iterator();

double[][] data = new double[1][12];
for (int i=0; i<12; i++)
{
	double d = ((Long)it.next()).doubleValue();
	data[0][i] = d;
}
String xAxisTitle = fix(txts.getString("CHART1_XAXIS"));
String yAxisTitle = fix(txts.getString("CHART1_YAXIS"));

Object[] arg = { year };
String title = fix(MessageFormat.format(txts.getString("CHART1_TITLE"), arg));

DataSeries dataSeries = new DataSeries( xAxisLabels, xAxisTitle, yAxisTitle, title );

String[] legendLabels = { fix(txts.getString("CHART1_LEGEND")) };

Paint[] paints={ new GradientPaint(0,0,new Color(255,213,83,150),0,350,new Color(243,116,0,200)) };
BarChartProperties barChartProperties = new BarChartProperties();

ValueLabelRenderer valueLabelRenderer = new ValueLabelRenderer( false, false, false, -1 );
valueLabelRenderer.setValueLabelPosition( ValueLabelPosition.ON_TOP );
valueLabelRenderer.useVerticalLabels(false);
barChartProperties.addPostRenderEventListener( valueLabelRenderer );

AxisChartDataSet axisChartDataSet = new AxisChartDataSet(data, legendLabels, paints, ChartType.BAR, barChartProperties);
dataSeries.addIAxisPlotDataSet(axisChartDataSet);
ChartProperties chartProperties = new ChartProperties();

DataAxisProperties xAxisProperties = new DataAxisProperties();
xAxisProperties.setAxisTitleChartFont(ft_axis);
xAxisProperties.setScaleChartFont(ft_labels);

DataAxisProperties yAxisProperties = new DataAxisProperties();
yAxisProperties.setAxisTitleChartFont(ft_axis);
yAxisProperties.setScaleChartFont(ft_labels);
yAxisProperties.setRoundToNearest(0);

AxisProperties axisProperties = new AxisProperties(xAxisProperties, yAxisProperties);
LegendProperties legendProperties = new LegendProperties();

chartProperties.setTitleFont(ft_title);
legendProperties.setFont(ft_base_);

axisProperties.setBackgroundPaint(new GradientPaint(0,0,new Color(255,255,255),0,300,new Color(167,213,255)));
AxisChart axisChart= new AxisChart(
dataSeries,
chartProperties,
axisProperties,
null, //legendProperties,
548, 350 ); // wymiary wykresu

response.setContentType("image/png");
PNGEncoder.encode(axisChart, out);

[jCharts-users] Vertical axis label misplaced and at 45 degrees (continued)

[Rainer R. <rai...@at...>]

Sorry for starting a new thread on this topic  - I wasn't fully signed 
up to this mailing list.

Nathaniel requested version/platform information.

I'm using jCharts 0.7.2 using the JKD 1.4.1 from Apple on Mac OS X 
10.2.6. I'll see whether I can reproduce this on a different platform 
but probably won't get to it until a week from now. If it persists I'll 
write some self contained code that exhibits this behavior.

By the way, this will not keep me from using jCharts (I don't 
absolutely need a label for the y axis). I was more interested if 
anyone else had seen something similar and how they solved it. Overall 
I'm very impressed with jCharts. I have very little problems turning 
the example code into what I needed.

Regards,

Rainer

Re: [jCharts-users] Vertical axis label misplaced (bug 758453)

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

What version of jCharts are you using?
What version jdk?
what platform?

Can you send your code, or code to make this happen?  I can not reproduce this with 0.7.3





--- Rainer Romatka <rai...@at...> wrote:
> As requested by Nathaniel, here is an example of a chart with the label 
> for the vertical axis at 45 degrees and not quite at the right location.
> 

> ATTACHMENT part 2.1 application/applefile name=45degreeSample.jpg


> ATTACHMENT part 2.2 image/jpeg x-mac-creator=38454C45; x-unix-mode=0644; x-mac-type=4A504547;
name=45degreeSample.jpg
> 
> 
> 
> The data for these charts comes from a database and the code for the 
> chart creation is not 100% stand-alone but fairly self contained:
> 
> 	public Chart createChart()
> 	{
> 		int horizontalCategoryCount = mHorizontalCategoryToValueMap.size();
> 		int verticalCategoryCount = mVerticalCategorySet.size();
> 		
> 		double[][] data = new 
> double[verticalCategoryCount][horizontalCategoryCount];
> 		Paint[] paints = new Paint[verticalCategoryCount];
> 		String[] horizontalLabels = new String[horizontalCategoryCount];
> 		String[] verticalLabels = new String[verticalCategoryCount];
> 		
> 		int horizontalCategoryIndex = 0;
> 		for ( Iterator horizontalCategoryIter = 
> mHorizontalCategoryToValueMap.entrySet().iterator();
> 				horizontalCategoryIter.hasNext(); /* */)
> 		{
> 			Map.Entry entry = (Map.Entry)horizontalCategoryIter.next();
> 			IDBObjectCategory horizontalCategory = 
> (IDBObjectCategory)entry.getKey();
> 			HorizontalCategoryData horizontalEntry = 
> (HorizontalCategoryData)entry.getValue();
> 			
> 			int verticalCategoryIndex = 0;
> 			for ( Iterator verticalCategoryIter = 
> mVerticalCategorySet.iterator();
> 					verticalCategoryIter.hasNext(); /* */)
> 			{
> 				IDBObjectCategory verticalCategory = null;
> 				try
> 				{
> 					verticalCategory = (IDBObjectCategory)verticalCategoryIter.next();
> 					double value = horizontalEntry.value( verticalCategory);
> 					data[verticalCategoryIndex][horizontalCategoryIndex] = value;
> 					++verticalCategoryIndex;
> 				}
> 				catch( Exception e)
> 				{
> 					cat.error( "Exception extracting value. Horizontal Index: " + 
> horizontalCategoryIndex +
> 								" Vertical index: " + verticalCategoryIndex +
> 								" (Category: " + verticalCategory.toString(), e);
> 					throw new IllegalStateException( "Exception extracting value");
> 				}
> 			}
> 
> 			horizontalLabels[horizontalCategoryIndex] = horizontalCategory.name( 
> mLocale);
> 
> 			++horizontalCategoryIndex;
> 		}
> 		
> 		int verticalCategoryIndex = 0;
> 		for ( Iterator verticalCategoryIter = mVerticalCategorySet.iterator();
> 				verticalCategoryIter.hasNext(); /* */)
> 		{
> 			IDBObjectCategory verticalCategory = 
> (IDBObjectCategory)verticalCategoryIter.next();
> 			paints[verticalCategoryIndex] = ChartServlet.chartColor( 
> verticalCategoryIndex);
> 			verticalLabels[verticalCategoryIndex] = verticalCategory.name( 
> mLocale);
> 			++verticalCategoryIndex;
> 		}
> 		
> 		String horizAxisTitle = mHorizAxisCategoryGrouper.displayName( 
> mLocale);
> 		String vertAxisTitle = mObjDef.getPropertyDefinition( 
> mValuePropName).getTitle( mLocale);
> 		
> 		DataSeries dataSeries = new DataSeries( horizontalLabels, 
> horizAxisTitle, vertAxisTitle, mTitle);
> 		StackedBarChartProperties stackedBarChartProperties= new 
> StackedBarChartProperties();
> 		AxisChartDataSet axisChartDataSet = null;
> 		try
> 		{
> 			axisChartDataSet =
> 				new AxisChartDataSet(	data, verticalLabels, paints, mChartType,
> 										stackedBarChartProperties );
> 		}
> 		catch( ChartDataException e)
> 		{
> 			cat.error( "Exception creating data set for pie chart", e);
> 		}
> 		dataSeries.addIAxisPlotDataSet( axisChartDataSet);
> 
> //		  ---to make this plot horizontally, pass true to the 
> AxisProperties Constructor
> //		  AxisProperties axisProperties= new AxisProperties( true );
> 		AxisProperties axisProperties= new AxisProperties();
> 
> 		return new AxisChart( dataSeries, chartProperties(), axisProperties,
> 											legendProperties(), mWidth, mHeight);
> 	}
> 
> Any help would be much appreciated.
> 
> Thanks,
> 
> Rainer


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[jCharts-users] 0.7.3 is out

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

Fixes in 0.7.3:
--------------------
* fixed bug in Scatter Plots where x-axis labels were not being drawn correctly.  
* fixed bug where the y-axis grid lines were not using the specified ChartStroke 


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Re: [jCharts-users] scatterplot example bug(??)

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

Ok, I found the problem; it is in ScatterPlotAxisChart.  I checked a fix into CVS under both the
0.7 and the krysalis-jcharts (the next major release) trees.

There most likely will be a 0.7.3 release this weekend to include this, plus another bug fix.





--- Hussein Vastani <hus...@ho...> wrote:
> Hi,
> First of all let me congratulate the jCharts team for creating a very useful tool indeed.
> 
> I think there's a bug in the ScatterPlot example in the .war file of the download. I deployed
> the war under Tomcat 4.1.18 and everything else works except for the scatterplot example. The
> x-axis data labels (-5,-2,1,...) are off-setted to the left starting from the border of the
> image. The same graph shown under the samples section of the website appears correctly. Is that
> a bug in the src code or just the .war example.
> 
> Thanks.
> 
> Hussein.


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[jCharts-users] scatterplot example bug(??)

[Hussein V. <hus...@ho...>]

Hi,
First of all let me congratulate the jCharts team for creating a very =
useful tool indeed.

I think there's a bug in the ScatterPlot example in the .war file of the =
download. I deployed the war under Tomcat 4.1.18 and everything else =
works except for the scatterplot example. The x-axis data labels =
(-5,-2,1,...) are off-setted to the left starting from the border of the =
image. The same graph shown under the samples section of the website =
appears correctly. Is that a bug in the src code or just the .war =
example.

Thanks.

Hussein.

[jCharts-users] Next Generation User Guide format question...

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

In porting the User Guide over to Forrest, I have a couple things I would like to get some
feedback on....


1) Should each item in the User Guide have *ALL* the code used to generate it there, or just the
relevant lines.  The source is still there as always when you download the User Guide.

2) IMO, the online user guide should reflect what is currently in CVS, not the last stable
release.  If someone wants the last stable release User Guide, they should download the latest
stable version of the user Guide. I think it is safe to say we will not be stripping out
functionality, so it is not as if we will advertise something that is not possible.


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Re: [jCharts-users] Trying to get the first sample jcharts running

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

a couple things:
1) you should not call JFrame.pack()
2) you need to call getGraphics() on the JPanel only after it is visible on the screen as Java
will not create a graphics item for non visible components that have never been visible.
3) the size of the JFrame includes the borders of the JFrame itself so you need to size it
accordingly.


try this:

public class a extends JPanel {
    LegendProperties lp = null;
    ChartProperties cp = null;
    BarChartProperties ctp = null;
    AxisChart c = null;
    AxisProperties ap = null;

    public a() throws Exception {
        ChartProperties cp = new ChartProperties();
        ctp = new BarChartProperties();

        String[] xAxisLabels = {"1995", "1996", "1997", "1998", "1999", "2000", "2001",
"2002","2003", "2004"};
        String xAxisTitle = "Years";
        String yAxisTitle = "Problems";
        String title = "Micro$oft At Work";
        DataSeries ds = new DataSeries( xAxisLabels, xAxisTitle, yAxisTitle, title );

        double[][] data = new double[][]{{1500, 6880, 4510, 2600, -1200, -1580, 7000, 4555,
4000,6120}};
        String[] legendLabels = {"Bugs"};
        Paint[] paints = new Paint[]{Color.yellow};
        ds.addIAxisPlotDataSet(new AxisChartDataSet( data, legendLabels, paints, ChartType.BAR,
ctp));

        lp = new LegendProperties();
        ap = new AxisProperties(false);

        c = new AxisChart(ds, cp, ap, lp, 400, 400);
        //c.setGraphics2D((Graphics2D)getGraphics());
    }

    public static void main(String args[]) throws Exception {
        JFrame f = new JFrame("a");
	    f.setSize( 500, 500 );

        a a = new a();
       a.setSize( 400,400);
        f.getContentPane().add(a);
       // f.pack();
        f.setVisible(true);
	    a.c.setGraphics2D((Graphics2D)a.getGraphics());
        a.c.render();
    }
}





--- Mike Eggleston <mi...@mi...> wrote:
> Hi Nathaniel!
> 
> On Wed, 18 Jun 2003, Nathaniel G. Auvil wrote:
> 
> > 
> > hey Mike.
> > 
> > http://jcharts.sourceforge.net/userGuide/exportingImages.html
> > 
> > 
> > take a look at the user guide for an example of a Swing app.  The package namespace has
> changed
> > from org.jCharts to org.krysalis.jcharts for the 1.0.0 release, but the code is the same.
> > 
> > At a quick glance, it looks like you only need to set the graphics2D from your JPanel (note
> the
> > 'J' in front of Panel, which is the Swing classes rather than the AWT Panel Object) and simply
> > call Render.
> 
> With the changes to JPanel and JFrame it compiles fine, but gets an error
> in the org.jCharts.Chart.render method.
> 
> Mike
> 
> public class a extends JPanel {
>     LegendProperties lp = null;
>     ChartProperties cp = null;
>     BarChartProperties ctp = null;
>     AxisChart c = null;
>     AxisProperties ap = null;
> 
>     public a() throws Exception {
>         ChartProperties cp = new ChartProperties();
>         ctp = new BarChartProperties();
> 
>         String[] xAxisLabels = {"1995", "1996", "1997", "1998", "1999", "2000", "2001", "2002",
> "2003", "2004"};
>         String xAxisTitle = "Years";
>         String yAxisTitle = "Problems";
>         String title = "Micro$oft At Work";
>         DataSeries ds = new DataSeries( xAxisLabels, xAxisTitle, yAxisTitle, title );
> 
>         double[][] data = new double[][]{{1500, 6880, 4510, 2600, -1200, -1580, 7000, 4555,
> 4000, 6120}};
>         String[] legendLabels = {"Bugs"};
>         Paint[] paints = new Paint[]{Color.yellow};
>         ds.addIAxisPlotDataSet(new AxisChartDataSet( data, legendLabels, paints, ChartType.BAR,
> ctp));
> 
>         lp = new LegendProperties();
>         ap = new AxisProperties(false);
> 
>         c = new AxisChart(ds, cp, ap, lp, 400, 400);
>         c.setGraphics2D((Graphics2D)getGraphics());
>     }
> 
>     public static void main(String args[]) throws Exception {
>         JFrame f = new JFrame("a");
> 
>         a a = new a();
> 
>         f.getContentPane().add(a);
>         f.pack();
>         f.setVisible(true);
>         a.c.render();
>     }
> }
> 
> :!javac a.java && java a
> Exception in thread "main" java.lang.NullPointerException
>         at org.jCharts.Chart.render(Unknown Source)
>         at a.main(a.java:46)
> 
> 


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Re: [jCharts-developers] Re: [jCharts-users] PieChart LEGEND_LABELS problem

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

--- Pal Perinbam <pal...@ya...> wrote:
> I think breaking after a user specified width will be fine.
>  

ok.


> Is this feature available now? if yes, how to use this feature?
>  

no, this is not in the codebase. It will be a feature request for the next release.



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[jCharts-users] Trying to get the first sample jcharts running

[Mike E. <mi...@mi...>]

import org.jCharts.axisChart.AxisChart;
import org.jCharts.chartData.*;
import org.jCharts.properties.*;
import org.jCharts.types.*;

import java.awt.*;

public class a extends Panel {
    LegendProperties lp = null;
    ChartProperties cp = null;
    BarChartProperties ctp = null;
    AxisChart c = null;
    AxisProperties ap = null;

    public a() throws Exception {
        ChartProperties cp = new ChartProperties();
        ctp = new BarChartProperties();

        String[] xAxisLabels = {"1995", "1996", "1997", "1998", "1999", "2000", "2001", "2002", "2003", "2004"};
        String xAxisTitle = "Years";
        String yAxisTitle = "Problems";
        String title = "Micro$oft At Work";
        DataSeries ds = new DataSeries( xAxisLabels, xAxisTitle, yAxisTitle, title );

        double[][] data = new double[][]{{1500, 6880, 4510, 2600, -1200, -1580, 7000, 4555, 4000, 6120}};
        String[] legendLabels = {"Bugs"};
        Paint[] paints = new Paint[]{Color.yellow};
        ds.addIAxisPlotDataSet(new AxisChartDataSet( data, legendLabels, paints, ChartType.BAR, ctp));

        lp = new LegendProperties();
        ap = new AxisProperties(false);

        c = new AxisChart(ds, cp, ap, lp, 400, 400);
    }

    public static void main(String args[]) throws Exception {
        Frame f = new Frame("a");
        Panel p = new Panel();

        a a = new a();

        p.add(a);
        f.add(p);
        f.pack();
        f.setVisible(true);
        a.c.renderChart();
    }
}

Re: [jCharts-users] PieChart LEGEND_LABELS problem

[Pal P. <pal...@ya...>]

I think breaking after a user specified width will be fine.
 
Is this feature available now? if yes, how to use this feature?
 


"Nathaniel G. Auvil" <nat...@ya...> wrote:

There was a typo....This is *NOT* in the current codebase.


--- "Nathaniel G. Auvil" wrote:
> 
> This is in the current codebase.
> 
> What would you like to see? Or should I say, how should we determine when to break? 
> 
> After each word?
> After a user specified break character?
> After a user specified width?
> 
> 
> 
> 
> --- Pal Perinbam 
wrote:
> > Hi,
> > I am generating pie charts with LEGEND_LABELS option. The pie chart shrinks when one or more
> > labels become large. is there an option to wrap the labels of the pie chart so that the chart
> do
> > not shrink when the labels become large.
> > I have attached the image of the chart.Please advice on this.
> > 
> > Regards,
> > Pal
> > 
> > 
> > 
> > 
> > ---------------------------------
> > Do you Yahoo!?
> > SBC Yahoo! DSL - Now only $29.95 per month!
> 
> > ATTACHMENT part 2 image/pjpeg name=testpie.jpg
> 
> 
> 
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[jCharts-users] RE: Displaying Chart and HTML Table

[Ganapathi N. <pa...@ya...>]

Played around a little with JSP and here is how,

<img src="LineChartServlet">
<table>
  data
</table>

Gana

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[jCharts-users] Displaying Chart and HTML Table

[Ganapathi N. <pa...@ya...>]

Greetings,

I've been using jCharts for a while but new to JSP. I
use Servlets to generate the required chart, and the
resulting jsp contains the chart. I would like to know
if it is possible to generate a Chart and a HTML table
in the same JSP page. The JSP page already contains a
table, below which a chart is added.

Any help on this is really appreciated.

Thanks
Gana Nanjappa

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Re: [jCharts-users] Scatter Plot Labels

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

Scatter Plots were not in the labelling first pass.  They are in the plan for 1.0.0, which will be
the next release.



--- Pal Perinbam <pal...@ya...> wrote:
> Hi,
>  
> Is there a provision to add labels for each point in scatter plot and display the labels
> adjacent to the points.
>  
> Regards,
> Pal
> 
> 
> ---------------------------------
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[jCharts-users] Scatter Plot Labels

[Pal P. <pal...@ya...>]

Hi,
 
Is there a provision to add labels for each point in scatter plot and display the labels adjacent to the points.
 
Regards,
Pal


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Re: [jCharts-users] Hi

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

> 
> with a scrollbar at the bottom. Moving the scrollbar, its listener
> would know how to adjust the six charts in sync with each other.
> So no OHLC stock bars, but each open, high, low, close could be
> plotted as individual lines?
> 

did you look at the sample Stock Chart?


> How would the real-time updates work?

I am not sure what you are after.  You add values to your data set and render the chart again. 
There are Interfaces in addition to an Implementation of the data structures, so you could
implement your own data sets if you do not like the ones provided.


Due to the generic nature of this library, very few assumptions can be made about optimizing the
rendering of real time data.  Can you think of any?  Remember the sizing and placement of all the
things on the chart are driven by the data sets, such as vertical axis labels, number of scale
items, etc...  

So, unless you can make assumptions about your data set, such as, all values fall within 0 - 100
and I always want 5 items in the scale starting at zero with an increment of 20, and i am using
horizontal x-axis labels, or my labels never change, etc... then you could say, I will only redraw
the plot area on each data item change as that is the only thing that will change in teh rendered
image.

The source is freely available and you can customize it to render however you like, such as
caching sizing values, and setting clipping regions based on assumptions to your data.

---nathaniel





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Re: [jCharts-users] Hi

[Mike E. <mi...@mi...>]

On Mon, 16 Jun 2003, Nathaniel G. Auvil wrote:

> 
> > - can jcharts work as I have described the app window
> >   - six charts in the primary app window
> 
> sure. You can have as many charts as you would like.
> 
> > - can jcharts plot stock bars
> >   - I know it can do lines
> currently, there are only lines for high,low,open,close.  bars representing the open and close
> range are not supported.  I will add this as a feature request for the next release.
> 
> 
> > - can jcharts handle the real-time update
> >   - if I need to manage the shifting of data to the left (older) that's fine
> sure.
> 
> 
> > - can jcharts work with an application (not applet)
> >   - I deliver all jar files using JNLP
> yes. There should be no problem running with Java Web Start.
> 
> 
> > - one odd thing I want to do is to eventially sync all charts to a single scroll
> >   bar at the bottom of the window
> >   - so that by moving the one scrollbar all charts are properly scrolled
> 
> this is more of how you layout your charts in your application. I believe what you want are a
> bunch of JPanel Objects in a single JScrollPane?

I'm thinking of the main window like this

+------------------------------+
|              |       |       |
|              |       |       |
|              |       |       |
|              +-------+       |
|              |       |       |
|              |       +-------+
|              |       |       |
|              +-------+       |
|              |       |       |
|              |       |       |
|              |       |       |
+------------------------------+

with a scrollbar at the bottom. Moving the scrollbar, its listener
would know how to adjust the six charts in sync with each other.

So no OHLC stock bars, but each open, high, low, close could be
plotted as individual lines?

How would the real-time updates work?

Mike

Re: [jCharts-users] Hi

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

> - can jcharts work as I have described the app window
>   - six charts in the primary app window

sure. You can have as many charts as you would like.

> - can jcharts plot stock bars
>   - I know it can do lines
currently, there are only lines for high,low,open,close.  bars representing the open and close
range are not supported.  I will add this as a feature request for the next release.


> - can jcharts handle the real-time update
>   - if I need to manage the shifting of data to the left (older) that's fine
sure.


> - can jcharts work with an application (not applet)
>   - I deliver all jar files using JNLP
yes. There should be no problem running with Java Web Start.


> - one odd thing I want to do is to eventially sync all charts to a single scroll
>   bar at the bottom of the window
>   - so that by moving the one scrollbar all charts are properly scrolled

this is more of how you layout your charts in your application. I believe what you want are a
bunch of JPanel Objects in a single JScrollPane?




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