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RE: [jCharts-users] Problems in Barchart and Line Chart
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From: Nathaniel G. A. <nat...@ya...> - 2003-08-26 14:53:06
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yes, I also added that code to the 'Patches' section of the jcharts sourceforge site.
--- Vikram Rajan <Vi...@PL...> wrote:
> Pal,
>
>
> w.r.t. to the axis labels, there is a length allocated to each label and
> jCharts calculates whether all labels can be fitted into the charts. If not,
> the labels are displayed selectively - alternate labels may be displayed, or
> every third label may be displayed, or every fourth ... depending on the
> size of the label. The size of the label is a function of the font size,
> font and the number of characters in the label string.
>
> There is a code submission in the developer's list which will help you get
> around the label problem by truncating labels and appending a "..." to them.
> It will also let you image map the label text so that when the user does a
> mouse over on the label, the complete string will be displayed.
>
> hope this helps,
> Vikram
>
> -----Original Message-----
> From: Pal Perinbam [mailto:pal...@ya...]
> Sent: Tuesday, August 26, 2003 7:07 PM
> To: jch...@li...
> Subject: [jCharts-users] Problems in Barchart and Line Chart
>
>
>
> Hi,
>
> As I told you earlier, I herewith send the code sample.
>
> Please run this by setting font size in the code.
>
>
> We are using Jcharts to generate charts for our project. We have a problem
> while printing the charts. The charts are fine on the
>
> screen but when we print that it looks blurred. We suspect it may be due to
> the Jpeg encoding. We encode the chart object into jpeg image
>
> using the Jpegencoder13 provided with jcharts. Is there a way to create BMP
> or any other high quality image from jcharts, or can we improve
>
> image quality by some other means.
>
> We also face another problem. When we increase the X Axis label font size
> of a line chart or bar chart, most of the Xaxis labels
>
> disappear. I've attached a sample to simulate this. In the below Sample. the
> chart is fine when the font size is 10, but when it is changed to 11
>
> the labels disappear.
>
> Expecting your earliest reply.
>
> import org.jCharts.properties.LegendProperties;
> import org.jCharts.properties.ChartProperties;
> import org.jCharts.properties.util.ChartStroke;
> import org.jCharts.properties.util.ChartFont;
> import org.jCharts.properties.BarChartProperties;
> import org.jCharts.properties.AxisProperties;
> import org.jCharts.properties.DataAxisProperties;
> import org.jCharts.chartData.AxisChartDataSet;
> import org.jCharts.chartData.interfaces.IAxisDataSeries;
> import org.jCharts.chartData.DataSeries;
> import org.jCharts.axisChart.AxisChart;
> import org.jCharts.types.ChartType;
> import org.jCharts.encoders.JPEGEncoder13;
> import java.awt.Color;
> import java.awt.Paint;
> import java.awt.Font;
> import java.awt.BasicStroke;
> import java.io.FileOutputStream;
>
> class createBarChart
> {
> public static void main(String[] args)
> {
> try {
> int fontSize=10; //Font Size
> int width = 300;
> int height = 200;
>
>
> LegendProperties legendProperties=null;
> ChartProperties chartProperties = new ChartProperties();
> AxisProperties axisProperties = new AxisProperties( false );
> FileOutputStream objFOS = new FileOutputStream("mychart.jpg");
>
> ChartFont axisScaleFont = new ChartFont( new Font( "Arial",
> Font.PLAIN,fontSize), Color.black );
> ChartStroke CSAxis = new ChartStroke(new BasicStroke(1.0f),Color.black);
>
> axisProperties.getXAxisProperties().setScaleChartFont(axisScaleFont);
> axisProperties.getXAxisProperties().setShowEndBorder(false);
> axisProperties.getXAxisProperties().setPaddingBetweenXAxisLabels(0f);
> axisProperties.getXAxisProperties().setAxisStroke(CSAxis);
>
> axisProperties.getXAxisProperties().setShowGridLines(DataAxisProperties.GRID
> _LINES_NONE);
> axisProperties.getYAxisProperties().setScaleChartFont(axisScaleFont);
> axisProperties.getYAxisProperties().setShowEndBorder(false);
> axisProperties.getYAxisProperties().setAxisStroke(CSAxis);
>
> axisProperties.getYAxisProperties().setShowGridLines(DataAxisProperties.GRID
> _LINES_NONE);
>
> String title=null;
> String[] legendLabels = {" "};
> Paint[] paints = new Paint[]{Color.blue};
> double[][] data = new double[][]{{2.4305638 , 76.2283304 , 59.5653992
>
> , 12.9185693 , -94.4018601 , 41.8006188 , 45.009868 ,
>
> -63.0464611 , 0.4272433 , 17.0886599 , 48.8614666 , 89.5960671
>
> , 44.107602 , 1.8919965 , -22.7345809 , 97.4517988 ,
>
> 95.248644 , 58.0654687 , 82.1011746 , 36.7686102 , 25.6530842
>
> , 60.0724961 , -93.1170484 , 23.6652036 , 37.0968087 ,
>
> 48.8910213 , 79.85264 , 53.9105076, 95.248644 , 58.0654687 ,
>
> 82.1011746 , 36.7686102 , 59.5653992 , 12.9185693 , -94.4018601 ,
>
> 41.8006188, 0.4272433 , 17.0886599 , 48.8614666 , 89.5960671}};
> String[] xAxisLabels = {"93"," "," "," ","94"," "," "," ","95"," "," ","
> ","96"," "," "," ","97"," "," "," ","98"," "," "," ","99","
>
> "," "," ","00"," "," "," ","01"," "," "," ","02"," "," "," "};
>
> DataAxisProperties dataAxisProperties = (DataAxisProperties)
> axisProperties.getYAxisProperties();
> dataAxisProperties.setUserDefinedScale(-100,50);
> dataAxisProperties.setNumItems(5);
> dataAxisProperties.setShowZeroLine(true);
>
> BarChartProperties barChartProperties = new BarChartProperties();
> barChartProperties.setShowOutlinesFlag(false);
> String xAxisTitle = null;
> String yAxisTitle = null;
> IAxisDataSeries dataSeries = new DataSeries( xAxisLabels, xAxisTitle,
> yAxisTitle, title );
> dataSeries.addIAxisPlotDataSet( new AxisChartDataSet( data, legendLabels,
> paints, ChartType.BAR,
>
> barChartProperties ) );
> AxisChart axisChart = new AxisChart( dataSeries, chartProperties,
> axisProperties, legendProperties, width,
>
> height );
>
> JPEGEncoder13.encode( axisChart, 1.0f, objFOS );
> }
> catch( Exception exp )
> {
> exp.printStackTrace();
> }
> }
> }
>
>
> Thanks,
> Pal
>
>
>
>
>
> _____
>
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=====
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