This subject seems to have been raised a number of times in various
forums, but I haven't seen a solution offered anywhere and my own
attempts to solve the problem have failed, so I post it here for
experts.
I have a UI created with GWT 2.1.1 and uibinder, for displaying an
annotated timeline visualization.
I am debugging it in FireFox 3.6.13 on Windows 7, but it also happens
in Chrome.
A simplified version of my uibinder file is:
<g:VerticalPanel>
<g:HTML addStyleNames='instructions'> <ui:msg
description="timeline_instructions">bla</ui:msg> </g:HTML>
<g:VerticalPanel ui:field="timelinePanel" width="100%" />
</g:VerticalPanel>
(I have tried with other Panel types and same result)
In my Java code for this composite widget, AFTER the visualization
call back is called and the AnnotatedTimeLine visualization package is
available, and when I have data, I create the AnnotatedTimeLine and
add it to the panel:
timeline = new AnnotatedTimeLine( "100%", "250px" ); // I want
timeline to fill width
// create Timeline Options, etc
timelinePanel.add( timeline );
When I then draw the timeline using:
timeline.draw( timeLineData, timeOptions );
This always causes an exception due to invalid width of the container.
15:30:10.397 [ERROR] [ta] Uncaught exception escaped
com.google.gwt.core.client.JavaScriptException: (Error): Container
width is zero. Expecting a valid width.
In various places I have tried querying the width of the panel (before
and after adding timeline) using timelinePanel.getOffsetWidth() and it
reports 0.
This exception causes the draw to fail.
A refresh of the browser will have it succeed on the second attempt.
Other posts talk about FireFox issues and how getOffsetWidth() returns
zero before everything is laid out....
I have also tried Adding the AnnotatedTimeLine directly in my uibinder
file, specifying width and height, but it says no default constructor
is available.
I can't see how I can provide a default constructor using @UiFactory,
as I have to wait for the Visualization package to load....
===
Is this a GWT Visualizations API bug? I'd be happy to report it...
Can anyone tell me how to create an AnnotatedTimeLine using GWT,
UIBinder, that spans 100% of the parent Widget/Panel, and that draws
on first attempt?
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