Easy Chart Pen ToolTips

[eckman.tech]

Need some help with the Easy Chart configureChart method. I am trying to change the mouse hover over tooltip on pens to display the tag documentation property from the tag itself.

The problem I’m having is figuring out how to expose and update the jfree chart for the mouse over tooltips on pens.

Has anyone accomplished this? I’ve searched through the forums and couldn’t find any straight forward solution.

[john.eichler]

Bump. I’d like to be able to change the numeric format of these tool tips. Any ideas?

[eckman.tech]

Bump. This has come up as a request again.

[justinedwards.jle]

@eckman.tech

expose and update the jfree chart

@pturmel showed us how to expose the chart here, and he exposes a lot of hidden properties in his Note Chart Module

Below is a recent forum example of his code being used to find the mode. I'm sure you could adapt it for this purpose:

Get Chart (not Easy Chart) mode in script

For the Easy Chart, I tested @pturmel's approach combined with @klpe's method for getting the radio buttons, and it works perfectly. However, if work is to be done with the code, there is no need to do the work every time the mouse enters the chart or every time the mouse enters some component on the chart, so rather than develop listeners, I simply added a custom component to the chart's parent container called oldMode. I then use the mode to evaluate whether or not work needs to be done at the…

[lrose]

Here is an example of creating a customMouseListener, which is what you will need. I think this example was for a Standard Chart component, but it will work for an easy chart as well. It's not exactly what you're looking for but its a pretty good start.

Jfree chart - click on rendered data point

This should do the trick: from org.jfree.chart import ChartMouseListener class CustomChartMouseListener(ChartMouseListener): def chartMouseClicked(self,e): xyItem = e.getEntity() #gets the data entity that was clicked, None if no entity was clicked if xyItem: #ensure that a data entity was clicked dataset = xyItem.getDataset() xValue = dataset.getXValue(xyItem.getSeriesIndex(),xyItem.getItem()) yValue = dataset.getYValue(xyI…

[justinedwards.jle]

@eckman.tech - I experimented with this, and I was able to manipulate the format of an easy chart's tool tips using a button's actionPerformed event handler. It should be easy to modify the method for any usage case. Here is the code:

from org.jfree.chart.labels import StandardXYToolTipGenerator
renderer = event.source.parent.getComponent('Easy Chart').getComponent(0).getComponent(0).chart.getPlot().getRenderer()
xFormat = renderer.getBaseToolTipGenerator().getXFormat().getInstance()
yFormat = renderer.getBaseToolTipGenerator().getYFormat().getInstance()
xFormat.applyPattern("00.0#")
renderer.setBaseToolTipGenerator(StandardXYToolTipGenerator("{2}% Full", yFormat, xFormat))

Tool tip before edit:

Tool tip after edit:

The key is the is the first field in the StandardXYToolTipGenerator. Using reflection, I was able to determine that the DEFAULT_TOOLTIP_FORMAT = "{0}: ({1}, {2})" where {0} is the field, {1} is the y axis, and {2} is the x axis.

The format string behaves like a MessageFormat, but for the xFormat, you will have to modify the format using the methods in java.txt.NumberFormat prior to applying the tool tip generator. Likewise the yFormat will have to be modified using the methods in java.text.DateFormat.

Finally, the getRenderer() method does not apply to all plots, so if you are using a piePlot for example, simply omit it, and use a StandardPieToolTipGenerator instead of a StandardXYToolTipGenerator:

toolTipGenerator = event.source.parent.getComponent('Easy Chart').getComponent(0).getComponent(0).chart.getPlot().getToolTipGenerator()
#	.getLabelFormat() = {0}: ({1}, {2})
#	.getNumberFormat() = java.text.DecimalFormat
#	.getPercentFormat() = java.text.DecimalFormat