hyperlinks with gwt - gwt

Question

I am new to GWT, I would like to use hyperlinks where I would like to redirect the user to another form.
My question is that , creating hyperlinks are easy, but how do I use them ?? addClickListener seems to be deprecated, is there any other way to go around this ?
Update 1
I have implemented the Hyper link code as follows :
Hyperlink link0 = new Hyperlink("Show Boxes","showbox");
History.addValueChangeHandler(this);
History.fireCurrentHistoryState();
public void onValueChange(ValueChangeEvent<String> event) {
String eventValue=event.getValue();
if(eventValue.equals("showbox")){
showBox();
}
}
With this I see that the form corresponding to one hyperlink is visible, but this form is not closed and another for is not being opened when I click one another hyperlink.
I am using DockPanel to display the form in the East direction. The forms for all the hyperlinks are just being displayed one below the other.
Any comments/suggestions for the same ?
Thanks,
Bhavya

Answer 1

Use the Anchor.addClickHandler() method!
Anchor a = new Anchor("text");
a.addClickHandler(new ClickHandler(){
// etc
});

Answer 2

If the another form is within your GWT application, then you should consider using Hyperlink. In constructor you provide a history token which is pushed to History object when link is clicked. You just need to handle event that a history token has changed. It decouples navigation events from your logic. This will also make your application aware of back-forward and allows users save bookmarks to specific state (form in your case). Anchor is intended more for external links.
See it described in Coding Basics - History .

Answer 3

First you need to create a HyperLink with a history token:
Hyperlink link = new Hyperlink("link to foo", "foo");
In above example, "foo" is the history token.
Then you should register your value change handler on History object, like
History.addValueChangeHandler(myValueChangeHandler);
In your value change handler, you will need to read in the current token using event.getValue().
class MyValueChangeHandler implements ValueChangeHandler<String>() {
public void onValueChange(ValueChangeEvent<String> event) {
//get the new value of history token
//clicking on above example link will return "foo" here
String historyToken = event.getValue();
}
}
What does the value of history token means is up to your application to decide. For example you can maintain a simple Map between history tokens and the view that should be rendered. In more sophisticated applications you can encode more details into the token -- like initial state of the form that should be displayed.