Nested Panels and nested questions are numbered incorrectly

[Darkninja027]

Describe the bug
Unable to create a consistent numbering on https://surveyjs.io/create-free-survey when using a nested numbering scheme.

Steps to reproduce

1. Go to https://surveyjs.io/create-free-survey
2. Set the JSON

{
  "logoPosition": "right",
  "pages": [
    {
      "name": "page1",
      "elements": [
        {
          "type": "panel",
          "name": "panel1",
          "title": "nya",
          "showNumber": true,
          "showQuestionNumbers": "onpanel",
          "questionStartIndex": "1.1",
          "elements": [
            {
              "type": "panel",
              "name": "panel2",
              "title": "inner",
              "showNumber": true,
              "showQuestionNumbers": "onpanel",
              "questionStartIndex": "1.1.1",
              "elements": [
                {
                  "type": "comment",
                  "name": "question1"
                }
              ]
            },
            {
              "type": "comment",
              "name": "question2"
            }
          ]
        },
        {
          "type": "panel",
          "name": "panel3",
          "title": "panel2",
          "showNumber": true,
          "showQuestionNumbers": "onpanel",
          "questionStartIndex": "1.1",
          "elements": [
            {
              "type": "panel",
              "name": "panel4",
              "title": "123",
              "showNumber": true,
              "showQuestionNumbers": "onpanel",
              "questionStartIndex": "1.1.1",
              "elements": [
                {
                  "type": "file",
                  "name": "question4"
                }
              ]
            },
            {
              "type": "comment",
              "name": "question3"
            }
          ]
        }
      ]
    }
  ],
  "questionStartIndex": "1"
}

4. Look at panel 2

Expected behavior
I would have expected the inner panel to be 2.1 with question 4 being 2.1.1, and question 3 being 2.2 (like it is).

If I change panel 2 Question Indexing type to '2.1' then the nested panel is correctly numbered, but question 3 is not

[andrewtelnov]

@Darkninja027 This PR will allow you to solve your issue.
It will add survey.onGetPanelNumber event that allows to implement the functionality you need.
Please check this unit test.

Thank you,
Andrew

[Darkninja027]

Hi andrew

I updated the package this morning and tested this implementation, however it still does not seem to work fully as expected

This image is from the surveyjs website demo

As you can see from the image I have a panel with the panel numbering starting at 3. i have set the numbering to restart on panel but the input questions displays 5.1 instead of the expected 3.1.

then when i attempt to do a panel -> panel -> question where the starting index is 3.2.1 the first question also has an incorrect value

it seems the way the question numbers are calculated may be incorrect.

however the numbering on the panels themselves seems to have resolved

If you would like me to log the internal question numbering being incorrect as a separate issue let me know and i will do so