Calculation of the defaultValues

[g_bolshakov]

Hello experts!

Please help me solve the problem:
I am working on developing an extension and I need to calculate the value from the field that is specified by default.
Example:

app_name: {
    type: "string",
    label: "Name APP",
    ref: "myproperties.app_name",
    defaultValue: "=DocumentTitle()",
    expression: "always",
},

As a result, I want to when accessing the layout.myproperties.app_name get "TestFileName.qvf" and not "=DocumentTitle()"

Is this realistic? 

[ErikWetterberg · Accepted solution]

If you don't want the user to be able to change the value don't include it in the property panel. Instead add a qStringExpression to initialProperties.

[g_bolshakov]

Erik, thanks!