Table of Contents - Sub-items

[dan-bowerman]

From the TCEI UX Review - a feature that could be useful for TCEI and future Storylines products.

Description

In a vertical OR horizontal ToC, it would be nice to specify a sub-heading or indentation, to let a user know a section has sub-sections within it.

From the UX review mockups:

For a vertical ToC, it could look like this (forgive the crude photoshop):

Is your feature request related to a problem?

TCEI has a section called "Project Summaries", and they will have 4-10 projects contained within this section. It would be really nice if the user could jump to those individual projects quickly, through a sub-menu or indented view.

A "sub-item" should correspond with an existing slide in the Storylines product.

[dan-bowerman]

This has renewed interest and may get leveraged in a few projects, TCEI being the primary.

Sub-items would be linked to a parent ToC item.
In a horizontal ToC sub-items would appear as a dropdown item. In a vertical ToC, there would be indentation.

[dan-bowerman]

My strongest preference is not not break backwards compatibility with existing products. Please share your thoughts on how we can cleanly implement this, if possible.

[yileifeng]

Idea of possible schema structure to support custom table of contents:

"tableOfContents": [
        {
            "title": "TCEI Project Summaries",
            "slideIndex": 0,
            "sublist": [
                {
                    "title": "Item 1",
                    "slideIndex": 1
                },
                {
                    "title": "Item 2",
                    "slideIndex": 2
                }
            ]
        },
        {
            "title": "Community Directory",
            "slideIndex": 3,
            "sublist": []
        }, 
        ...
    ],

This would be a config property on the root level. If specified in the config, we can construct the table of contents entirely based on the provided config structure (needs code verification). Otherwise, we will just default to the current table of contents using the slide-specific ToC toggle flag so backwards compatibility is all good.