Question about WebChart

Targets Web
1

Is there a way to start a bar chart scale from zero? What I’m seeing is that when the data spread is small, say from values 2 to 10, the scale starts at 2.

From what I’ve investigated in JS this is how the scale is set:

options: {
    scales: {
        yAxes: [{
            ticks: {
                beginAtZero: true
            }
        }]
    }
}

I can’t seem to find a way to do it in Xojo.

Any help is appreciated :slight_smile:

2

In OverrideOptions event of the WebChart
you can do something lile this:

Var json_scales As New JSONItem
Var json_yAxes As New JSONItem

Var json_ticks As New JSONItem
json_ticks.value("beginAtZero") = True

json_yAxes.add(json_ticks)

json_scales.value("yAxes") = json_yAxes
json.value("scales") = json_scales

Untested but that’s your direction.

You may need to test for the keys already existing and just update what you want, i’m not sure about that.

3

Thank you!

That points me in the right direction

4

In case someone needs this, following @DerkJ 's advice this is what I got working:

Var json_scales As New JSONItem
Var json_yAxes As New JSONItem

Var json_ticks As New JSONItem
json_ticks.value("ticks") = "ticks"

Var json_begin_at_zero As New JSONItem
json_begin_at_zero.Value("beginAtZero") = True

json_ticks.Value("ticks") = json_begin_at_zero

json_yAxes.add(json_ticks)

json_scales.value("yAxes") = json_yAxes

options.value("scales") = json_scales
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