topic Re: Undo last changed parameter in Inventor Forum

Undo last changed parameter

Anonymous — Fri, 18 Nov 2016 11:03:39 GMT

Hi all,

I'm creating a form/configurator to produce an assembly.

I'd like to write a rule that if someone changes a parameter which will in turn put parameter 'x' above an allowed limit, it will undo this change.

The changed parameter could be one of a few different ones.

Eg.

Parameter 'y' is changed, putting 'x' over it's limit. The change in parameter 'y' is undone.

Parameter 'z' is changed putting 'x' over it's limit. The change in parameter 'z' is undone.

So the rule will know what parameter was changed and set it back to it's previous value.

Any help would be greatly appreciated!

- Richard

Re: Undo last changed parameter

ThomasB44 — Fri, 18 Nov 2016 13:49:58 GMT

Hi @Anonymous

First idea :

In your iLogic form you can set the mini and maxi values, check here :

Second idea :

I've wrote this code, it works well, try it.

The parameters must be in blue to run the rule automatically.

SyntaxEditor Code Snippet

triggerA = ParamA
triggerB = ParamB

If ParamA < 25 Or ParamA > 100 Then
MessageBox.Show("Please set a value between 25 and 100", "iLogic")
oDef = ThisApplication.CommandManager.ControlDefinitions.Item("AppUndoCmd")
oDef.execute
End If

If ParamB < 25 Or ParamB > 100 Then
MessageBox.Show("Please set a value between 25 and 100", "iLogic")
oDef = ThisApplication.CommandManager.ControlDefinitions.Item("AppUndoCmd")
oDef.execute
End If

Re: Undo last changed parameter

Anonymous — Tue, 22 Nov 2016 14:49:18 GMT

Hi Thomas,

Thanks for the response! I've been trying this code and it works - but only the first time! If I re-enter the value the same it sticks.

E.g.

I open the form

Parameter A is '200'

I enter '500' in parameter A

This causes Parameter B to be above it's limit of '1000'

The message box comes up and tells me, and the parameter change is undone.

I enter '500' in parameter A again.

The form shows parameter A as 500, but in the parameter dialogue it is set to the original value.

If this was just for me to use it would be fine, but unfortunately i need to make this idiot proof 😄

Kind regards,

Richard

Re: Undo last changed parameter

ThomasB44 — Tue, 22 Nov 2016 15:13:23 GMT

Unfortunately it seems you are right.

The rule works well in part environment when editing dimensions in sketches.

But with an iLogic form the undo command seems to don't work correctly.

Try to add "oDef.execute" 2 times instead of one, it is strange but it seems to be the key.

In your form, perhaps a set of a value or a hit of apply is an action ?

But it is not logical in my mind.

Re: Undo last changed parameter

ThomasB44 — Wed, 23 Nov 2016 08:29:27 GMT

Hi @Anonymous,

I was just thinking to something else which could work better to your needs.

I think the "undo" command is dangerous and unstable...

So, the goal is to capture current state of your parameters and store then in custom properties. Each time you change a (blue) parameter in your form, it will be compared to a custom property. At the end of the rule, the (blue) parameter is saved in the custom property.

Look at this and please try :

SyntaxEditor Code Snippet

'You must run the rule one time first to create and set the custom properties
'Then you can active the MessageBox below

'Check the parameters values and custom iProperties values
'MessageBox.Show("ParamA = " & ParamA _
'& vbNewLine & "iPropA = " & iProperties.Value("Custom", "ParamA") _
'& vbNewLine & "ParamB = " & ParamB _
'& vbNewLine & "iPropB = " & iProperties.Value("Custom", "ParamB"), "Title")

'Check parameters values
If ParamA < 25 Or ParamA > 100 Then
MessageBox.Show("Please set a value between 25 and 100", "iLogic")
ParamA = iProperties.Value("Custom", "ParamA")
End If

If ParamB < 25 Or ParamB > 100 Then
MessageBox.Show("Please set a value between 25 and 100", "iLogic")
ParamB = iProperties.Value("Custom", "ParamB")
End If

'Create or save current parameters in custom properties
oMyParameter = ThisApplication.ActiveDocument.ComponentDefinition.Parameters.UserParameters
Try 
iProperties.Value("Custom", "ParamA") = ParamA
iProperties.Value("Custom", "ParamB") = ParamB
Catch
oMyParameter.AddByExpression ("ParamA", ParamA, UnitsTypeEnum.kMillimeterLengthUnits)
oMyParameter.AddByExpression ("ParamB", ParamB, UnitsTypeEnum.kMillimeterLengthUnits)
End Try

iLogicVb.UpdateWhenDone = True

I think this code will allow you more possibilities to play with your parameters.

Hope this help

Re: Undo last changed parameter

Anonymous — Thu, 24 Nov 2016 15:41:43 GMT

Hi Thomas,

That's working great! Thankyou!

I managed to pare down my ilogic functions to have very minimal 'undo' commands, and this works for the last few that I couldn't avoid 😄

Kind regards,

Richard