Question Re: GUI scripting. How not traverse object tree each time? in Technology Q&A

GUI scripting. How not traverse object tree each time?

former_member237609 — Tue, 19 Nov 2019 08:57:34 GMT

Hi,

I have several questions

1. Is it possible to not traverse object tree each time i want to access specific field?

So far i use Object.children.item() and so on. But it seems that anyway SAP traverse all the elements.

I thought it would be more performant but after profiling it seems not.

How to avoid that? Keep some kind of cache to access elements directly

2. Some GUI events doesn’t work: Hit, Error.

I catch them from Session object (Session_Hit, etc).

CreateSession and DestroySession works just fine.

The idea is same as built-in recorder: listen to user events and record script but with different payload (trying to avoid continuous session.FindById... and make element names human-readable).

Thank you in advance!

Re: GUI scripting. How not traverse object tree each time?

former_member237609 — Mon, 02 Dec 2019 10:43:03 GMT

@stefan.schnell Hi Stefan. It seems that you only the person can help me there 🙂

Re: GUI scripting. How not traverse object tree each time?

Sandra_Rossi — Mon, 02 Dec 2019 13:41:23 GMT

If you do a comment under a question/answer and you want to target someone else than the question/answer' author, the only solution is to copy/paste their hyperlinked name so that the person receives a warning (NB: @ doesn't work)

Re: GUI scripting. How not traverse object tree each time?

Sandra_Rossi — Mon, 02 Dec 2019 13:48:29 GMT

In SAP GUI for Windows, there is the Recorder in the System menu, which records your input and generate a VBScript.

It generates this kind of lines:

set field = FindById( "/app/con[0]/ses[0]/wnd[0]/usr/lblRS38M-PROGRAMM" )

Re: GUI scripting. How not traverse object tree each time?

former_member237609 — Mon, 02 Dec 2019 14:12:08 GMT

stefan.schnell Hi Stefan. It seems that you only the person can help me there 🙂

Re: GUI scripting. How not traverse object tree each time?

former_member237609 — Mon, 02 Dec 2019 14:13:31 GMT

Thanks!

I do understand it. But question is as in subject how to not traverse object model as it happens with finbyid function.

Re: GUI scripting. How not traverse object tree each time?

Stefan-Schnell — Thu, 05 Dec 2019 08:17:50 GMT

Hello Conrad,

very interesting questions and a very interesting perspective.

1. I have never done a profiling of this kind. Here my example:

TStart = Timer()
For i = 1 To 100
  session.findById("wnd[0]/usr/txtRSYST-MANDT").Text = CStr(i)
Next
TEnd = Timer()
MsgBox CStr(TEnd - TStart) 'Result 0,8

Set Field = session.findById("wnd[0]/usr/txtRSYST-MANDT")
TStart = Timer()
For i = 1 To 100
  Field.Text = CStr(i)
Next
TEnd = Timer()
MsgBox CStr(TEnd - TStart) 'Result 0,4

It's about twice as fast to work with objects instead of the findById with the ID.

Wow...

sandra.rossi and you give the answer, cache the UI element in an object. I don't know another way.

2. The hit event works with the following example.

Sub ses_Error(Sess, ErrID, Desc1, Desc2, Desc3, Desc4)
  MsgBox(Desc1 & vbCrLf & Desc2 & vbCrLf & Desc3 & vbCrLf & Desc4)
End Sub

Sub ses_Hit(Sess, Comp, IObj)
  MsgBox(IObj) 'Works perfect
End Sub

Set SapGuiAuto  = GetObject("SAPGUI")
Set application = SapGuiAuto.GetScriptingEngine
Set connection = application.Children(0)
Set session    = connection.Children(0)

If IsObject(WScript) Then
  WScript.ConnectObject session, "ses_"
End If

'-To use hit event it is necessary to set this property-----------------
session.findById("wnd[0]").ElementVisualizationMode = True

MsgBox "Press to end"

I can't simulate the error event, but I assume this code example works.

How do you simulate an access denial to a a SAP GUI ActiveX control in a running script?

Let us know your experience.

Best regards
Stefan

Re: GUI scripting. How not traverse object tree each time?

former_member237609 — Wed, 15 Jan 2020 13:52:43 GMT

Hi everybody. Sorry for such a late reply.

It seems that there's misunderstanding.

Set ScreenA = Session.FindById("BLA")

Set ScreenB = Session.FindById("BLABLA")

ScreenB.DoubleClick 'entered 2nd screen.

ScreenB.MoveBack 'entered 1st screen.

ScreenA.Text 'object is not available anymore because SAP cleaned reference.

Set ScreenA = Session.FindById("BLA") 'so you've to find it again which is obviously costy. I often faced with such an operation in loop where you have to switch between 2 screens.

So the original question is that how can i keep reference to ScreenA between screen change?

I think it's limitation of host application (SAP) so its should be changed from there. But maybe there's some workaround exist which i'm unaware of.