Is there a way to know when the Powerchart in perspective is getting historical data? The Easy Chart in Vision has a 'Loading' indicator which is very helpful in letting users know when it is busy getting data. Without this indicator they often think things aren't working when it takes sometime to get the data and then they either hit refresh or try adding more tags which make things take longer. Any insight would be helpful.
2 Likes
One workaround I've done is making my own indicator (e.g. a simple label that says "Loading...") whose visibility is bound to the data property of the chart. If no data, then display the label. When I first load up the page, I'll briefly see the indicator until the data shows up on the chart, at which point the indicator disappears. Note that I use this for my time series charts and have not tried it for a power chart, but I imagine it would work similarly.
I would do that but there is no data property on the PowerChart. The exposed properties are not like the other charts. I don't want to make a custom tool for Historical trending to just provide a loading indicator. The PowerChart has so many nice features but the loading does make it painful for some users doing longer historical pulls.
Came here to second this suggestion...perhaps a chart property that indicates whether a load is in progress that can then be referenced by other bindings?