Hi,
I'm wondering if someone can help me. I'm new to GWT, I'm very well
versed in Java, but less so in dealing with browsers/DOM/js. I expect
this is a common problem.
What I'm trying to do is incorporate GWT into an existing app. (Don't
stop reading yet) I'll make this abstract:
I have a TabPanel, with HTML widgets added on (the tabs). The HTML
has links in it, some of which send the user off the site (external
links), and some internal. For the internal links (which I know by
matching the href to my domain), instead of the browser following the
link, and replacing the entire page as it did pre-GWT, I'd like to
replace the internal links (read: add click listeners, and cancel the
event bubbling so the browser doesn't follow the link) with
asynchronous calls to get another HTML page, and replace the contents
of the *current tab* with the response. Essentially, I have HTML
pages with pagination links at the bottom. When a user goes to page
2, I want to replace the tab ajax-ily. I'd rather not change server-
side code to help, as I want to have the option of not being tied to
GWT. So, how?
I've tried this, and its not working, and I'm stuck - onBrowserEvent()
doesn't seem to be getting called.
<code>
private void replaceLinks(final Element e) {
NodeList<Element> anchors = e.getElementsByTagName("a");
for(int i = 0; i < anchors.getLength(); i++){
final AnchorElement ae =
AnchorElement.as(anchors.getItem(i));
if(ae.getHref().startsWith("http://localhost:8080/myapp";)){
final String newHref = ae.getHref();
Window.alert("attempting to *replace* link of
href: "+ae.getHref
());
final Anchor a = new Anchor(ae){
@Override
public void onBrowserEvent(Event event)
{
Window.alert("1 got click,
sending request for: "+ae.getHref());
super.onBrowserEvent(event);
event.cancelBubble(true);
switch
(DOM.eventGetType(event)) {
case Event.ONCLICK:
Window.alert("got click,
sending request for: "+ae.getHref
());
RequestBuilder rb = new
RequestBuilder(RequestBuilder.GET,
newHref); //TODO localize URL
rb.setCallback(new
RequestCallback(){
public void
onError(Request request,
Throwable exception) {
e.setPropertyString("currentURL", newHref);
e.setInnerHTML("problem encountered -"+exception.getMessage
());
}
public void
onResponseReceived(
Request request,
Response response) {
e.setPropertyString("currentURL", newHref);
e.setInnerHTML(response.getText());
}
});
}
}
};
a.sinkEvents(Event.MOUSEEVENTS); //what does
sink event mean?
}
}
}
</code>
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