Predefined annotation event on Perspective Power Chart

Ignition
,
1

I’m looking to use the Power Chart component to replace a paper chart recorder. The end user wants to press a button and have the chart annotated with predefined text (i.e. “collection step started”, “elution step complete”, etc.) and the name of the logged in user. My plan was to have a memory array with the predefined text and paste it along with the credentials of the active user through an actionPerformed script on a button.

The problem: I don’t know how to create the annotation via scripting. Is this possible?

2

system.tag.storeAnnotations - it’s not yet in the user manual (oops) but autocomplete in the software should get you started on using it.

1 Like
3

:scream:

image

If it had not been for this post, I wouldn’t have noticed that is not only all system.tag.*Annotations are nowhere to be found in the user manual, but also the documentation is missing within the Designer for the following functions:

system.tag.deleteAnnotations has no docstring.
system.tag.queryAnnotations docstring is missing the description for types

Maybe in 8.1.2 they’ll be available?

4

This Button script stored an annotation for anyone working their way through this;

"""
system.tag.storeAnnotations(paths, startTimes, endTimes, types, data, storageId, deleted )
"""

from datetime import datetime

endTime = system.date.now()
startTime = system.date.addSeconds(endTime, -0)
tagpath = 'histprov:Postgres:/drv:cardiff:default:/tag:sterilization/vtis/mainstep'

results = system.tag.storeAnnotations( paths = [tagpath], startTimes = [startTime], endTimes= [endTime],data= ['Step Number Test'] )

system.perspective.print(message=results)
1 Like
5

Thanks! This is exactly what I need!

6

Very helpful. Thanks for sharing!

7

@PGriffith Could you expand on the “type” argument for system.tag.storeAnnotations? The function descriptions states that it defaults to “marker” if not specified but the “sqlth_annotations” description says that the only type is “note.” What are the options available?

Also, is it possible to edit/move the annotations so that they don’t sit atop each other? I’m hoping to use the Print To PDF functionality, but three of my four annotations won’t be visible.

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image1105×758 42.7 KB

1 Like
8

The type should be one of four literal strings that are currently understood by the power chart for representation:

    /** A user stored note. **/
    "note"
    /** A date range that indicates a special area **/
    "range"
    /** A point in time marker **/
    "marker"
    /** A single point or date range that indicates an X-trace **/
    "trace"