How to hide labels which are zero in Bar charts

Ignition
1

Hi,
I am using a Stacked bar chart to show the Downtime in Hours for all days in a month, I would like to hide the labels which are zero in the chart.
Is it possible to hide the labels which are only 0 in the bar chart?
Did we need to do use configure chart in the Component scripting section to achieve the same?
Any help will be appreciated!

barchart
barchart897×385 15.8 KB

2

If the data is coming from a binding then you just need to add a script transform to the binding to weed out the bits you don’t want. The database results will be returned as value and you just add some transform code like this:

# This code assumes that value format is like 
# [{"date": '2022-03-01', "hours": 0.6}, {"date": '2022-03-02", "hours": 0}, ...]
output = []
for row in value:
    if  row['hours'] > 0:
        output.append({"date": value['date'], "hours": value['hours']})
return output
1 Like
3

Just a guess, since they didn’t actually say and there is no tag, but since the OP mentions the Component scripting section, I believe they are referencing Vision, in which case a transform is not available.

@Vengatesan_S If this is for vision, you can create a custom Label Generator in the configureChart function. Something like this:

class myLabelGenerator(StandardCategoryItemLabelGenerator):
    def generateLabel(self,dataset,series, category):
        value = dataset.getValue(series,category)
        if value == 0:
            return None
        return str(value)

chart = event.source.parent.getComponent(‘Bar Chart’).getChart()
plot = chart.getPlot()
renderer = plot.getRenderer()
renderer.setItemLabelGenerator(myLabelGenerator())
renderer.setItemLabelsVisible(True)
2 Likes
4

Thanks @Transistor and Irose, As i am using Vision Irose’s solution worked out for me , I just used that script in property change.

5

Please remember to use the appropriate tag when writing a question!

6

Thanks Irose for the solution. Is it possible to position the bar label at center with this solution?

7

Adjustments to label position are certainly doable, but can you elaborate or perhaps provide a sample picture of what you mean by this?

1 Like