Hi,
I create line charts (x-y plot) based on data retrieved from a database. These line charts are basically trends for a month. My problem is that at the first of a month , when there is only one data point , the line chart appears blank.
Is there a way to bolden a data point , so that at least one boldened point is visible on the graph.
While browsing the forum I came across a reference to task id = 26480 on the JFreeChart tasklist on SourceForge . I was unable to find the status or any further information
Any help or suggestion will be greatly greatly appreciated
Thanks
Madhu
To display a single data point on a line chart
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David Gilbert
RE: To display a single data point on a line chart
Hi Madhu,
You could change the type of the StandardXYItemRenderer from LINES to SHAPES_AND_LINES. That will draw small shapes at each data point, as well as the lines. There's still some work to do on the shapes though...
Otherwise you'd need to make some modification in the drawItem(...) method in the StandardXYItemRenderer class. I think I need to change it anyway, as technically the XYDataset could supply the odd null value, and it won't handle this at present. While I'm doing that, I'll look at how to handle lone points...
Regards,
DG.
You could change the type of the StandardXYItemRenderer from LINES to SHAPES_AND_LINES. That will draw small shapes at each data point, as well as the lines. There's still some work to do on the shapes though...
Otherwise you'd need to make some modification in the drawItem(...) method in the StandardXYItemRenderer class. I think I need to change it anyway, as technically the XYDataset could supply the odd null value, and it won't handle this at present. While I'm doing that, I'll look at how to handle lone points...
Regards,
DG.