Removing properties for questions created by custom toolbox item

Hello,
I am not sure what you are trying to do. visible is 'true" by default. You are overriding the property completely with other it's attributes, like property type for example.
Probably the better solution for you will be creator.onCanShowProperty event. Please review this example.

Thank you,
Andrew
SurveyJS Team

Yeah, I ended up using creator.onCanShowProperty as a workaround. It doesn't really fit well with my declarative data-driven approach for everything config related but it's not a big deal.

Thank you!

You may create a json object that you may later use in the event.

Thank you,
Andrew
SurveyJS Team

Yeah, essentially I would need to capture this logic in a declarative way:

JavaScript
if (
  options.obj.getType() !== "placeholders" &&
  options.property.name === "defaultValue"
) {
  options.canShow = false;
}

It'd be great to be able to configure properties explicitly on a question type basis, and reconfigure those same properties on child classes differently.

Like this pseudo-code (using a yaml syntax just for readability in the discussion):

Code
question:
  propertyConfig:
    defaultValue:
      visible: false // Make 'defaultValue' property hidden for all question types ('question' class and its child classes)
placeholders:
  propertyConfig:
    defaultValue:
      visible: true // Override visibility of 'defaultValue' property for 'placeholders' class (which inherits 'question') and its child classes

It could probably be done in user code (creator.onCanShowProperty) but would require introspection of the question type class hierarchy, which I don't really want to get into. If that logic could be handled by SurveyJS and exposed in a declarative way, I'd certainly make use of it. I understand it might not be a priority though.

For more context, my goal is to provide a toolbox item that can be instantiated in a survey to provide an extensible set of named placeholders that can then be referenced throughout the survey template.

So I am trying to add a custom question type called placeholders that inherits only some of multipletext's behavior and properties, without affecting the actual multipletext question type.

More precisely, I want this custom question type to have only the following properties:

• name
• items
• defaultValue
• visible (ideally read-only, hidden and defaulting to false)

However, I also want defaultValue to be hidden in all question types except the custom one.

Then, just like if it were a multipletext question, I want follow-up questions in a survey to be able to reference the (default) values of the individual items of an instance of this custom question type.

You may hide defaultValue for questions at once as:
Survey.Serializer.findProperty("question", "defaultValue").visible = false;
and
Survey.Serializer.addClass( "placeholders", [{ name: "defaultValue", visible: true }], null, "multipletext");

For your properties for placeHolder you may use the JSON object that you later use in the creator.onCanShowProperty event, for example:

JavaScript
var whitePropertyList = {
  placeHolder: ["name", "items", "defaultValue"]
}
creator  
    .onCanShowProperty  
    .add(function (sender, options) {  
        var whiteList = whitePropertyList[options.obj.getType()];
        if (!!whiteList) {  
            options.canShow = whiteList.indexOf(options.property.name) > -1;  
        }  
    })  

You may add opposite a blackPropertyList variable.

Thank you,
Andrew
SurveyJS Team

Forgot to mention. We have creator.onGetPropertyReadOnly event.

Thank you,
Andrew
SurveyJS Team

The problem with

JavaScript
Survey.Serializer.addClass( "placeholders", [{ name: "defaultValue", visible: true }], null, "multipletext");

is that like you said it's overriding the property completely and I'm losing its other attributes, like property type. I want defaultValue to have the original type, which seems to be a special type not listed in the documentation (it's not itemvalues as I would have expected).

That is not an issue. You may always set old or new property type:
Survey.Serializer.addClass( "placeholders", [{ name: "defaultValue:value", visible: true }], null, "multipletext");

Thank you,
Andrew
SurveyJS Team

Ah, I wasn't aware of the value property type. I suggest adding it to the documentation here https://surveyjs.io/Documentation/Survey-Creator/ :)

I've run into a strange issue with databinding (i.e. automatic rerendering) of the defaultValue property after applying changes in the question modal editor.

Side note: I had to add the property in the modal editor manually.

Here's the plunk: https://plnkr.co/edit/RgCGv8tlJAuNQ8ZAtfga

Steps to reproduce:

• Instantiate a Placeholders toolbox item in the survey document
• Click "Edit" on the instantiated element to open the modal editor
• Edit the default value of the customer item
• Click 'OK'
• Notice how the change is not reflected in the survey document

Side note: this only happens with the custom placeholders question type. There is no databinding issue for the defaultValue property of the multipletext question type, for example.

Hello,

I've created a separate ticket on your behalf (T2406: defaultValue property doesn't update question in designer immediately if it is located in the Question Editor). It has been placed in our processing queue and will be answered shortly.

PS: I have added "value" property editor description via this commit.

Thank you,
Andrew
SurveyJS Team