Quick response: in GWT2.0, use
History.addValueChangeHandler(ValueChangeHandler<java.lang.String>
handler)
that is not deprecated
Try use
History.newItem("page" + tabIndex,false);
to avoid firing event, this may be the cause
Hope that helps
Oscar
On Feb 7, 9:19 am, AM <[email protected]> wrote:
> Hi,
> I am running into this weird issue where the onHistoryChanged() isn't
> being called when I hit the browser's back button or even if I call
> History.back(). I am testing this in the hosted mode (even running it
> in firefox yields me the same result). The strange thing is, if I call
> History.back() thrice - looks like it calls onHistoryChanged() on the
> third request - it is quite confusing and I was hoping if someone
> could shed some light on this issue that I am running into.
>
> I am using GWT 1.5 and to demonstrate my case, I'll use the example in
> the GWT-1.5 tutorial (http://preview.tinyurl.com/6grjh2)
>
> // Excluding imports for brevity
>
> // Entry point classes define <code>onModuleLoad()</code>.
> public class BrowserHistoryExample implements EntryPoint {
>
> TabPanel tabPanel;
>
> public void onModuleLoad() {
>
> tabPanel = new TabPanel();
>
> int tabIndex = 0;
>
> // A Ext-GWT ContentPanel
> (com.extjs.gxt.ui.client.widget.ContentPanel)
> ContentPanel cp = new ContentPanel();
> cp.addText("Page1");
> tabPanel.add(cp, "Page1");
>
> cp = new ContentPanel();
> cp.addText("Page2");
> tabPanel.add(cp, "Page2");
>
> Button backButton = new Button("Back");
> backButton.addClickListener(new ClickListener () {
>
> public void onClick(Widget arg0) {
> System.out.println("Going back now ...");
>
> History.back();
>
> // Commenting this for now ...
> // but on un-commenting, the third call to
> History.back() seems to invoke onHistoryChanged()
> // History.back();
> // History.back();
> }
> });
> cp = new ContentPanel();
> cp.addText("Page3");
> cp.add(backButton);
> tabPanel.add(cp, "Page3");
>
> tabPanel.addTabListener(new TabListener() {
>
> public boolean onBeforeTabSelected(SourcesTabEvents sender, int
> tabIndex) {
> return true;
> }
>
> public void onTabSelected(SourcesTabEvents sender, int tabIndex)
> {
> // Push an item onto the history stack
> System.out.println("Pushing tabIndex: " + tabIndex + " on the
> stack");
> History.newItem("page" + tabIndex);
> }
> });
>
> History.addHistoryListener(new HistoryListener() {
>
> public void onHistoryChanged(String historyToken) {
>
> System.out.println("Got token: " + historyToken);
>
> // Parse the history token
> try {
> if (historyToken.substring(0, 4).equals("page")) {
> String tabIndexToken = historyToken.substring(4, 5);
> int tabIndex = Integer.parseInt(tabIndexToken);
> // Select the specified tab panel
> tabPanel.selectTab(tabIndex);
> } else {
> tabPanel.selectTab(0);
> }
>
> } catch (IndexOutOfBoundsException e) {
> tabPanel.selectTab(0);
> }
> }
> });
>
> tabPanel.selectTab(0);
> RootPanel.get().add(tabPanel);
> }
>
> }
>
> So the thing is, when I navigate from Page1 tab to Page2 tab to Page3
> tab - and then when I hit the "back" button (defined above, which
> simply calls History.back()) - nothing really happens for the first 2
> times I hit the button. Only when I hit it the third time (or
> alternatively call History.back() thrice in the buttonClick event) -
> is the onHistoryChanged() method invoked.
>
> Again, it would be great if someone could help me figure out whats
> going on?
>
> Thanks!
--
You received this message because you are subscribed to the Google Groups
"Google Web Toolkit" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/google-web-toolkit?hl=en.
