Chart widget and axes which are time values.

[scott at elementarysoftware.com]

Okay, that totally didn’t work… including all the strike-out text. (sigh) Let me just say that I’m really liking the Cart widget, even if I can’t quite getting working for me yet.

—
Scott

> On Feb 22, 2022, at 6:23 PM, scott--- via use-livecode <use-livecode at lists.runrev.com> wrote:
> 
> Alex, I’m replying off list because my ulterior motive is to ask you a question.
> 
> Argh.  I see, after re-reading your post, that my remarks are useless. 
> 
> I’ve been spending a bit of time trying to replace my old chartsEngine library with the new chart widget. I haven’t tried any of the commands that wrap JSON. So, ultimately I have no answer to your question. I’ve used the more simplistic COMMA delimited [ set the csvData of widget "Chart" to tCSVData ].  (The TAB delimited one seems to work also.)
> 
> One thing that sometimes made a difference about what displayed was using: [ set the lockChartUpdates of widget "Chart" to “true” ] before messing with the widget and then [ set the lockChartUpdates of widget "Chart" to “false” ] when I was done.
> 
> I suspect that you have tried this already but...
> 
> Using [ put "cats"&COMMA&"19"&CR&"dogs"&COMMA&"12"&&CR&"gerbils"&COMMA&"5"&&CR&"wombats"&COMMA&"9" into tCSVData ]  puts “cats, dogs, gerbils and wombats” along the X-axis for me.
> 
> I found that:  [ set the dataLabels of widget "Chart" to "Cats,Dogs,Gerbils,Wombats” ]  would also set the X-axis labels if it matched up with the number of data points.
> 
> 
> My question for you, since you’ve been messing with the widget, is about setting the alpha / transparency of the chartBackgroundColor property. Only one time have I seen it work as expected from the property inspector and never have I been able to produce a transparent background by script. I was wondering if you had tried this property. (I posted about this in bugzilla and the mothership asked me to create a separate bug report because it worked fine for them… I don’t have a problem creating a bug report, it just seemed odd that it absolutely doesn’t work for me.)
> 
> --
> Scott Morrow
> 
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> 
> 
> 
>> On Feb 22, 2022, at 5:54 AM, Alex Tweedly via use-livecode <use-livecode at lists.runrev.com> wrote:
>> 
>> I've been trying to use the new chart widget, but no success yet.
>> 
>> All the charts I want to do have times (or dates) along the X axis.
>> 
>> I can see that any options which have not been wrapped in LC can be set by doing something like:
>> 
>>   put the chartJSONOptions of widget "mine" into tA
>>   put "time" into tA["scales"]["x"]["type"]
>>   set the chartJSONOptions of widget "mine" to tA
>> 
>> but this still gives me
>> 
>>    Error: This method is not implemented:
>>    Check that a complete date adapter is provided.
>> 
>> 
>> and I have no idea how to provide a date adapter from LC.
>> 
>> Has anyone else tried date/times with more success ?
>> 
>> (The chart.js documentation implies there is a default adapter - so nothing should need to be done. It also talks about installing JS libraries for other adapters - but I don't quite get it).
>> 
>> Thanks,
>> 
>> Alex.
>> 
>> 
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