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polymer-selector

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polymer-selector's Issues

Can polymer-selector do an initial check for `active`

In some situations it's easier to set a menu item as active instead of setting a selected index. For example, here's some markup from the Polymer site:

<dropdown-panel>
  <polymer-ui-menu-item
    src="/images/picons/ic_guide_dark_.png"
    label="Start"
    href="/docs/start/getting-the-code.html"
    {% if page.navgroup == 'start' %}active{% endif %}>
  </polymer-ui-menu-item>

  <polymer-ui-menu-item
    src="/images/picons/ic_book_dark_.png"
    label="Docs"
    href="/docs/polymer/polymer.html"
    {% if page.navgroup == 'docs' %}active{% endif %}>
  </polymer-ui-menu-item>

  <polymer-ui-menu-item
    src="/images/picons/ic_feedback_dark_.png"
    label="Resources"
    href="/resources/faq.html"
    {% if page.navgroup == 'resources' %}active{% endif %}>
  </polymer-ui-menu-item>

  <polymer-ui-menu-item
    src="/images/picons/ic_people_dark.png"
    label="Community"
    href="/discuss.html"
    {% if page.navgroup == 'community' %}active{% endif %}>
  </polymer-ui-menu-item>
</dropdown-panel>

Is it possible for polymer-selector to do an initial check of its children to determine which item is selected? Without this check, if I assign another item as selected it will not remove the original active attribute and I end up with two active items.

Can polymer-selector observe for selectedModel changed

Currently, polymer-selector only observes changes to selectedItem. Could it also observe changes to selectedModel? I would like to dynamically change selection by specifying a data object in my array, without caring what HTML element does it bind to.

I think Polymer website would also benefit from that because currently it does quite a lot of work to expand an item in the menu: https://github.com/Polymer/docs/blob/39329d74c0511e5fd8d7bfe3d380cc70b0f116f1/elements/docs-menu.html#L73 (see method highlightItemWithURL)

Allow items to be filtered via itemsSelector when target is self

polymer-ui-menu extends polymer-selector and the selector target is the menu itself. It would be useful to be able to locate the menu items as other than direct children of the menu. The itemsSelector property is intended for this use but it only works if the selector targets another element.

This would be useful for this type of construction:

<polymer-ui-menu>
  <a><polymer-ui-menu-item></polymer-ui-menu-item></a>
 ...

See this thread for more info: https://groups.google.com/forum/#!topic/polymer-dev/CTumvA_cTtE