Width of bars in a bar chart.

[rsreejithnair]

Hi All,

How to control the width of a bar in a Bar/Stacked/3D Bar chart?

If there is only one bar present in the chart, then its taking the whole width of the chart.

[kchaudhry]

You can write a custom class to define the width of the bars.

[rsreejithnair]

thanks for the reply...

 

Could you tell me how to define a custom class and how to use it to control the bar width??? I am new to iReport..

 

 

[dnvsrikanth]

Hi,

 

You can use JFreeChart Library for this purpose.

 

The JasperReports distribution has a sample shipped that demonstrates how to develop a custom class to customize the graphs.

 

DNV Srikanth.

[rsreejithnair]

Hi.. am using iReport version 2.0.5

can u help me how to do it in iReport???

[alivelove2003]

 While using iReport, if we select the chart and view the properties window, we can find  a property named Customizer Class.

So we can give a class name here but that class must implement net.sf.jasperreports.engine.JRChartCustomizer interface (better to include all relevant jfree chart and jasperreport jars). 

The interface has one method,

public void customize(JFreeChart chart, JRChart jasperChart) which we have to implement. In this method we get a reference to the JFreeChart instance which we can use to obtain its CategoryPlot instance. Thru CategoryPlot instance we can obtain a CategoryItemRenderer instance. Then we can cast this CategoryItemRenderer instance to BarRenderer instance.  BarRenderer instance has a method to set the maximum width of the bar chart. So dive into the JFree API.  :-)

[cleitonesc3]

can someone send me an example and explain me better how to set a larger width for my chart?