I would give each core-item a unique attribute, maybe data-target="#foo" and give the core-menu a valueattr="data-target" attribute. Then give each of your sections a matching id (ex: <h4 id="foo">). So as you scroll, tell the core-menu to set it's selected property to whatever the current header id is. That should then apply the .core-selected class to the menu item with a matching data-target.
On Wed, Feb 4, 2015 at 7:20 PM, <[email protected]> wrote: > I have an application that uses a typical pattern of core-items inside of > core-submenus inside of a core-menu. This menu is in a drawer. My main > content area is a very long text content based page. Clicking on any of the > core-items, jumps you to a specific anchor in the main content. > > My question is how can I programmatically control which > core-item/core-submenus are selected? I'd like to implement the pattern > where a user scrolls the main content area to a different section and the > core-menu selection changes in unison based on what text content is > currently visible. I can monitor scroll events in my main window, but how > would I change which item is selected in the core-menu? > > Follow Polymer on Google+: plus.google.com/107187849809354688692 > --- > You received this message because you are subscribed to the Google Groups > "Polymer" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/polymer-dev/d1e7f133-b8d3-4341-b88b-e5a3734299c3%40googlegroups.com > <https://groups.google.com/d/msgid/polymer-dev/d1e7f133-b8d3-4341-b88b-e5a3734299c3%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > Follow Polymer on Google+: plus.google.com/107187849809354688692 --- You received this message because you are subscribed to the Google Groups "Polymer" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/polymer-dev/CAJj5OwBpVyS38kr0tyAJZ_feC0WM5E5dDDK0p7HtJBOWXm6tKg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
