On 27 avr, 22:26, Gavin Andresen <[email protected]> wrote:
> First, what I'm trying to do:
>
> I've got a page with lots of hyperlinks on it (plain-old <a href=...>
> tags).
>
> When the user shift-clicks on links that match a certain pattern
> (e.g. /author/AUTHOR_IDENTIFIER), I popup a dialog box that lets them
> perform an edit INSTEAD of following the link.
>
> In GWT 1.5, I did this:
>
> public void onModuleLoad() {
> ...
> DOM.addEventPreview
> (this);
> }
>
> //
> // look for shift-clicks on paper/author links, and pops
> up
> // edit dialog
> boxes:
> //
> public boolean onEventPreview(Event event) {
> if (DOM.eventGetType(event) != Event.ONCLICK) { return true; }
> if (!event.getShiftKey()) { return true; }
>
> Element e = event.getTarget();
> String href = e.getAttribute("href");
> if (href == null || href.length() == 0){ return true; }
>
> if (href.contains("/paper/")) {
> String paperPID = InterfaceUtils.getPIDFromLinkString(href,
> "paper/");
> fetchPaperInfoThenEdit(paperPID);
> return false;
> }
> else if (href.contains("/author/")) {
> String authorPID = InterfaceUtils.getPIDFromLinkString(href,
> "author/");
> Map<String,String> params = InterfaceUtils.parseURLParams(href);
> fetchAuthorInfoThenEdit(authorPID, params.get("fromPaper"));
> return false;
> }
> return true;
> }
>
> In 1.6, I've rewritten the code to use onPreviewNativeEvent(), but
> it's not working; if I cancel() or consume() (or both) the
> NativePreviewEvent, the browser STILL follows the link.
If you consume() the event, it'll be propagated to the link and cannot
be canceled by another NativePreviewHandler; so consume() is really
not the method you should be using here.
Re. cancel(), first check if the vent hasn't already been consumed()d
by a preview handler, with pe.isConsumed(), or eventually check that
you are the first handler (pe.isFirstHandler()).
I have no other idea... (apart from a possible bug in GWT...)
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