Gantt Chart Tooltips

[Aaron_Shivne]

I am making use of the Gantt Chart in Vision and I am looking for a way to change the information in the mouse over tooltip.

Currently it will show the Row/task and show the time span in a (mmm, d, yyyy) format. My chart is only showing tasks that all occur on the same day so I would prefer the tooltip to display the time span as hh:mm:ss format.

Attempting to use the example from this post:

Getting and Setting Bar Chart tooltips

Is there a way to override the functionality for the bar chart’s tooltips? I’m trying to find a way to change what is displayed when you mouse over one of the bars. I was hoping there would be an easy way to find what the default value would be, change it, and then write back the text I want. The getToolTipText() and setToolTipText() functions get and set the Mouseover Text, which is what appears when your mouse is not over a bar. Is there a feature in here that I’m missing?

Except not getting any results.

Any tips?

[Aaron_Shivne]

Simply reformatting my query to only get the Time portion of the Datetime data is not accepted by the Gantt chart, which requires a Datetime for the Start and End Time data.

[Aaron_Shivne]

I've managed to change the tooltip using the code from the example, slightly changed and placed in the property change script. Its returning integer values for all 3 variables below.
Where my dataset (multiply rows, 4 columns) has "String", Datetime, Datetime, Integer

from org.jfree.chart.labels import CategoryToolTipGenerator
	
class CustomToolTipGenerator(CategoryToolTipGenerator):
	def generateToolTip(self,dataset,row,column):
		task = dataset.getValue(0,0)
		start = dataset.getValue(0,1)
		end = dataset.getValue(0,2)
		return "%s, %s, %s"%(task,start,end)
	
chart = event.source.getChart()
renderer = chart.getPlot().getRenderer()
renderer.setToolTipGenerator(CustomToolTipGenerator())

[Aaron_Shivne]

With the above code the result I am getting looks like this:

Would be nice if there was simple method for formatting the default tooltip.

[pturmel]

Those three numbers are milliseconds UTC (jfreechart likes numbers in its datasets). Use system.date.fromMillis() to make date objects, and then format those as you see fit with system.date.format....

[Aaron_Shivne]

Thanks that worked out. I am still having some issues now with dataset.getValue function.

dataset.getValue(0,0) is returning a time value as well when in the dataset it is a string value.
Also trying dataset.getValue(Row,0) nothing happens.

When I view the client I get the new tooltips only some of the times, so I am not sure if my property change script is calling itself when I would like it to.