I'm not a fan of frames, but in this particular situation, I don't have a lot
of control over the the content that's displayed in one of the frames so I
need to keep it separate from the rest of the application.
I have three frames. A header frame that stretches all the way across the
top, a navigation frame below the header on the left, and a content frame
below the header on the right. The header and navigation frames contain
standard wicket driven pages and the content frame will usually hold
external HTML content.
The navigation frame contains a Tree component. The Header contains links
for 'Next' and 'Previous'. A user can navigate either by clicking one of
the items in the tree or by clicking Next or Previous in the header.
I've got the actual navigation working. When someone clicks Next, Previous,
or a tree item, the content frame goes to the right place. However, I can't
seem to figure out a way to update the Tree's visual indication of which
node is selected when I click Next or Previous in the Header. I thought that
perhaps some javascript magic might take place if I passed my navigation
page (called 'nav' int he code below) to the header frame, and then did
something like:
add(new AjaxLink("nextLink") {
public void onClick(final AjaxRequestTarget target) {
target.addComponent(nav.getLearningItemTree());
nav.getLearningItemTree().getTreeState().selectNode(nextNode,
true);
}
});
Well, this does actually update the backed of the Tree component, but the
actual visual representation of the tree in the navigation frame doesn't get
updated. Of course, if I put the same Next link actually ON the navigation
frame page, then it works as expected.
So, it seems like this should be possible, somehow. The link on the
navigation page is simply a javascript call. I should be able to make that
same call from the header frame by means of a "parent.nav.xxxxx", but I
can't figure out what that xxxxx should be. Or maybe there's a call that
will simply refresh that tree component, or parts of it.
Any ideas?
Matt
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