Hi Donald:
According to
http://google-web-toolkit.googlecode.com/svn/javadoc/2.0/com/google/gwt/user/client/ui/SplitLayoutPanel.html
,
you must attach a SplitLayoutPanel to the RootLayoutPanel, not the
RootPanel. I'm guessing that you don't see the text due to the CSS
positioning attributes.
Also, as that page indicates
"This widget will *only* work in standards mode, which requires that the
HTML page in which it is run have an explicit <!DOCTYPE> declaration." That
declaration may be present, it's not clear from the post.
Cheers,
jec
On Mon, May 24, 2010 at 10:09 AM, Donald McLean <dmclea...@gmail.com> wrote:
> We're doing a technology evaluation and one of the candidate
> technologies is GWT. I'm working on implementing some basic features
> of our new application and so far things mostly make sense but I'm
> seeing some behavior that I don't understand.
>
> Below I have included the relevant class file. I'm sure that it's
> somewhat crude - feel free to make suggestions if you are so
> motivated. :-)
>
> The problem is that none of the text is actually visible. Firefox says
> that it's there but it can't actually be seen. I would really like to
> understand why and what I need to fix.
>
> Thank you,
>
> Donald
>
> package edu.stsci.client;
>
> import com.google.gwt.user.client.Timer;
> import com.google.gwt.core.client.EntryPoint;
> import com.google.gwt.core.client.GWT;
> import com.google.gwt.user.client.rpc.AsyncCallback;
> import com.google.gwt.user.client.ui.*;
>
> /**
> * Entry point classes define <code>onModuleLoad()</code>.
> */
> public class dads implements EntryPoint
> {
> private static final int REFRESH_INTERVAL = 5000; // ms
>
> /**
> * Create a remote service proxy to talk to the server-side Status
> service.
> */
> private final StatusServiceAsync statusService =
> GWT.create(StatusService.class);
>
> final Label upLabel = new Label();
> final Label downLabel = new Label();
>
> /**
> * This is the entry point method.
> */
> public void onModuleLoad()
> {
> SplitLayoutPanel p = new SplitLayoutPanel();
>
> FlexTable nav = new FlexTable();
>
> nav.setText(0,0, "DADS Status");
> nav.getFlexCellFormatter().setColSpan(0,0,2);
>
> nav.setText(1, 0, "Up:");
> nav.setWidget(1, 1, upLabel);
> nav.setText(2, 0, "Down:");
> nav.setWidget(2, 1, downLabel);
>
> p.addWest(nav, 128);
>
> HTML header = new HTML("<h1>DADS Web Operator Interface</
> h1>");
> p.addNorth(header, 40);
>
> HTML body = new HTML("details");
> p.add(body);
>
> RootPanel.get().add(p);
>
> setupUpdateTimer();
> }
>
> private void setupUpdateTimer()
> {
> // Setup timer to refresh list automatically.
> Timer refreshTimer = new Timer()
> {
> @Override
> public void run()
> {
> refreshServerStatus();
> }
> };
> refreshTimer.scheduleRepeating(REFRESH_INTERVAL);
> }
>
> private void refreshServerStatus()
> {
> statusService.statusServer("server", new UpdateLabels());
> }
>
> class UpdateLabels
> implements AsyncCallback<String>
> {
> public void onFailure(Throwable caught)
> {
> System.out.println("[dads.onFailure] enter.");
> upLabel.setText("not available");
> downLabel.setText("not available");
> }
>
> public void onSuccess(String result)
> {
> System.out.println("[dads.onSuccess] result: " + result);
> String[] strings = result.split(",");
> upLabel.setText(strings[0]);
> downLabel.setText(strings[1]);
> }
> }
> }
>
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