Re: [jCharts-users] Exporting chart to JPEG

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Hi

I have looked through the JavaDocs and found the class ScaleCalculator (in the
org.jcharts.axischart.axis.scale package). I have not tried it yet (due to lack
of time), but will it be possible to implement a specialized version of this
class and use it to compute a logarithmic scale for me?

Has anyone done this?

Thanks

regards
Bent Are Melsom

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

> 
> Logarithmic scales are not yet possible.  You can set the min and increment
> of the scale, but this
> will not give you a logarithmic scale as I understand it.  Take a look at the
> javadocs for the
> AxisProperties Constructor.
> 
> 
> 
> --- Bent Are Melsom <me...@f1...> wrote:
> > Hi
> > 
> > Thanks that worked out just fine. time for another question;)
> > 
> > Have anybody used a logarithmic scale on one of the axis? I hava a need
> > for this. Is there some way in which I can set the values of the markings
> > on an axis? This way I can compute the scala and set the values to the
> > axis.
> > 
> > regards
> > Bent Are Melsom
> > 
> > ---------------------------------------
> > Bent Are Melsom
> > mobile: 950 22 874
> > e-mail: me...@f1...
> > ---------------------------------------
> > 
> > On Mon, 10 Nov 2003, Nathaniel G. Auvil wrote:
> > 
> > >
> > > Your chart is 1 pixel by 1 pixel, try increasing the size.
> > >
> > >
> > >
> > > --- Bent Are Melsom <me...@f1...> wrote:
> > > > Hi
> > > >
> > > > This is the code for my chart. I suppose that you are referring to
> the
> > > > line
> > > >
> > > > double[][] data= new double[][]{ { 250, 45, -36, 66, 145, 80, 55 }
> > > > };
> > > >
> > > > If not, you can see the whole code here:
> > > >
> > > > String[] xAxisLabels= { "1998", "1999", "2000", "2001", "2002",
> "2003",
> > > > "2004" };
> > > > String xAxisTitle= "Years";
> > > > String yAxisTitle= "Problems";
> > > > String title= "CIBER";
> > > > DataSeries dataSeries = new DataSeries( xAxisLabels, xAxisTitle,
> > > > yAxisTitle, title );
> > > >
> > > > double[][] data= new double[][]{ { 250, 45, -36, 66, 145, 80, 55 }
> > > > };
> > > > String[] legendLabels= { "Bugs" };
> > > > Paint[] paints=TestDataGenerator.getRandomPaints( 1 );
> > > >
> > > > Stroke[] strokes= { LineChartProperties.DEFAULT_LINE_STROKE };
> > > > Shape[] shapes= { PointChartProperties.SHAPE_CIRCLE };
> > > > LineChartProperties lineChartProperties= new LineChartProperties(
> > > > 	strokes, shapes );
> > > > AxisChartDataSet axisChartDataSet= new AxisChartDataSet( data,
> > > > 	legendLabels, paints, ChartType.LINE, lineChartProperties );
> > > > dataSeries.addIAxisPlotDataSet( axisChartDataSet );
> > > >
> > > > ChartProperties chartProperties= new ChartProperties();
> > > > AxisProperties axisProperties= new AxisProperties();
> > > > LegendProperties legendProperties= new LegendProperties();
> > > >
> > > > AxisChart axisChart= new AxisChart( dataSeries, chartProperties,
> > > > 	axisProperties, legendProperties, 1,1 );
> > > >
> > > > Thanks!
> > > >
> > > > regards
> > > > Bent Are Melsom
> > > >
> > > > ---------------------------------------
> > > > Bent Are Melsom
> > > > mobile: 950 22 874
> > > > e-mail: me...@f1...
> > > > ---------------------------------------
> > > >
> > > > On Mon, 10 Nov 2003, Nathaniel G. Auvil wrote:
> > > >
> > > > >
> > > > > what are you sending as your data?
> > > > >
> > > > >
> > > > > --- Bent Are Melsom <me...@f1...> wrote:
> > > > > > Hi
> > > > > >
> > > > > > I am trying to export a chart to a JPEG image using the
> JPEGEncoder13
> > > > > > class. This does not work, all I get is an
> IndexOutOfBoundsException. The
> > > > > > code is
> > > > > >
> > > > > > File file = new File("c:\\file.jpg");
> > > > > > OutputStream out = new FileOutputStream(file);
> > > > > > JPEGEncoder13.encode(axisChart,0.5f,out);
> > > > > >
> > > > > > The exception is:
> > > > > >
> > > > > > java.lang.ArrayIndexOutOfBoundsException: -1
> > > > > > 	int java.awt.font.LineBreakMeasurer.nextOffset(float, int,
> > > > > > 	boolean)
> > > > > > 		LineBreakMeasurer.java:334
> > > > > > 	java.awt.font.TextLayout
> > > > > > 	java.awt.font.LineBreakMeasurer.nextLayout(float, int, boolean)
> > > > > > 		LineBreakMeasurer.java:408
> > > > > > 	java.awt.font.TextLayout
> > > > > > 	java.awt.font.LineBreakMeasurer.nextLayout(float)
> > > > > > 		LineBreakMeasurer.java:382
> > > > > > 	float org.jCharts.Chart.renderChartTitle(java.lang.String,
> > > > > > 		java.awt.font.FontRenderContext)
> > > > > > 	void org.jCharts.axisChart.AxisChart.renderChart()
> > > > > > 	void org.jCharts.Chart.render()
> > > > > > 	java.awt.image.BufferedImage
> > > > > > 	org.jCharts.encoders.BinaryEncoderUtil.render(org.jCharts.Chart)
> > > > > > 	void
> org.jCharts.encoders.JPEGEncoder13.encode(org.jCharts.Chart,
> > > > > > 	float, java.io.OutputStream)
> > > > > > 	void mypackage2.TestClass.generateLineChart()
> > > > > > 		TestClass.java:49
> > > > > > 	void mypackage2.TestClass.main(java.lang.String[])
> > > > > > 		TestClass.java:62
> > > > > >
> > > > > > The chart is the coded using the example from the user
> documentation
> > > > > > of linechart from User's Guide 0.3.0 of jCharts 0.7.
> > > > > >
> > > > > > Does anybody have a hint?
> > > > > >
> > > > > > regards
> > > > > > Bent Are Melsom
> > > > > > ---------------------------------------
> > > > > > Bent Are Melsom
> > > > > > mobile: 950 22 874
> > > > > > e-mail: me...@f1...
> > > > > > ---------------------------------------
> > > > > >
> > > > > >
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