need to distinguish between statechange and hierarchychange
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Key: WICKET-776
URL: https://issues.apache.org/jira/browse/WICKET-776
Project: Wicket
Issue Type: Improvement
Components: wicket
Affects Versions: 1.3.0-beta2, 1.2.6
Reporter: Igor Vaynberg
Fix For: 1.4.0-alpha
currently we do not distinguish between state changes that result in hierarchy
change and those that do not. this causes problems for versioning because it is
impossible to version fields during render phase. for example:
abstractpageableview.getcurrentpage() is called during render to determine the
current page, but inside it also has the ability to trim the returned page
against getpagecount() - so sometimes it is necessary to set currentpage to
some value during render phase. however, we cannot do so AND make the change
versioned because it will result in:
org.apache.wicket.WicketRuntimeException: Cannot modify component hierarchy
during render phase
at
org.apache.wicket.Component.checkHierarchyChange(Component.java:2885)
at
org.apache.wicket.Component.addStateChange(Component.java:2817)
at
org.apache.wicket.markup.repeater.AbstractPageableView.setCurrentPage(AbstractPageableView.java:273)
at
org.apache.wicket.markup.repeater.AbstractPageableView.getCurrentPage(AbstractPageableView.java:251)
i am temporarily removing versioning during this usecase in
abstractpageableview.getcurrentpage() until we fix this.
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