gwt-widgets: Compile issues when using org.gwtproject namespace

[jnehlmeier]

Migrating gwt-widgets to gwt-uibinder reveals the following issue:

Using

<ui:UiBinder xmlns:ui='urn:ui:org.gwtproject.uibinder' 
             xmlns:g='urn:import:org.gwtproject.user.client.ui'>

fails with

/.../src/main/java/org/gwtproject/user/client/ui/NotificationMole.java:44: 
error: Bad prefix on <ui:UiBinder>? The root element must be in 
xml namespace "urn:ui:com.google.gwt.uibinder" (usually with prefix "ui:"), 
but this has prefix "ui": <ui:UiBinder> (:3)
  interface Binder extends UiBinder<HTMLPanel, NotificationMole> {

Changing namespace back to com.google.gwt as suggested/required by the error above, results in:

/.../src/main/java/org/gwtproject/user/client/ui/NotificationMole.java:44: 
error: Found unexpected child element: 
<div class='{style.centered}' style='display:none' ui:field='borderElement'> (:30)
  interface Binder extends UiBinder<HTMLPanel, NotificationMole> {

I guess XML schema files, validation and maybe some code need to be updated to check/allow both com.google.gwt and org.gwtproject packages.

[jhickman]

This is known. The first milestone of the gwt-widgets was to convert from the GWT generators to APT. This means it only supports the old widget package along with classes like HasWidgets, etc. Work will need to be done to support the new widget packages. Hopefully not a lot, but I don't think it'll be able to support both moving forward due to needed changes in the xsd.

Also, gwt-widgets would not be able to depend on gwt-uibinder as gwt-uibinder would have to have gwt-widgets as a depedency. This would cause a cycle. "Technically" this can be done with just using Strings for the gwt-widget types and that will be investigated.

[jhickman]

Large refactoring effort took place this week to extract (most of) the GWT widget packages out as a configuration class. Now we can choose modern/new widgets&safehtml&DOM vs legacy classes with a new attribute on the @UiTemplate annotation called legacyWidgets. By default, it is false, thus uses the new widget packages. For anyone with uibinder templates with the old widgets, this should be set to true.

[jnehlmeier]

Nice, just tried it and it seem to work. 4 info messages have been logged for the 4 processed *.ui.xml files in gwt-widgets.

I noticed that AbstractUiRenderer.java still uses old imports which all have existing new imports. I guess that need to be changed as well?

[treblereel]

fyi:
at this moment with some hacks i am able to compile gwtbootstrap3 using onlu org.gwtproject libs, all works good except styles