The basic issue here is that TreeItems aren't Widgets, so (by design) they don't handle their own events. You'll want to review Tree to decide how best to manage your events.
http://google-web-toolkit.googlecode.com/svn/javadoc/2.3/com/google/gwt/user/client/ui/Tree.html http://google-web-toolkit.googlecode.com/svn/javadoc/2.3/com/google/gwt/user/client/ui/TreeItem.html http://www.google.com/codesearch#A1edwVHBClQ/user/src/com/google/gwt/user/client/ui/Tree.java http://www.google.com/codesearch#A1edwVHBClQ/user/src/com/google/gwt/user/client/ui/TreeItem.java On Aug 4, 6:08 am, lkcl <[email protected]> wrote: > folks hi, > > this is luke, the lead developer of the python port of GWT. we > regularly track the GWT source code, to the point of having 3 > different semi-automated java-to-python converters of varying levels > of sophistication, and the reason for doing that is to save vast > amounts of time and resources, because the GWT source code is much > more tested. > > _very_ occasionally we find a bug in GWT which has been transferred - > verbatim - from the direct translation to python. it would be very > good, therefore, to have peoples' input on this issue, and to have a > discussion of this bug which could affect users of both GWT and > pyjamas. > > the issue is this: a user has created a Tree and has placed TreeItems > in it, and then attached a CheckBox onto the TreeItem. the problem is > that in these CheckBoxes, no onClicks or any other kind of event > handling occur, period. > > now, i'm dead impressed that this new pyjamas developer then went and > delved into the pyjs ui source code and found the problem _and_ > created a fix:http://code.google.com/p/pyjamas/issues/?id=638 > > diff --git a/library/gwt/ui/TreeItem.py b/library/gwt/ui/TreeItem.py > index f5c0489..d5a413f 100644 > --- a/library/gwt/ui/TreeItem.py > +++ b/library/gwt/ui/TreeItem.py > @@ -127,10 +127,18 @@ class TreeItem(UIObject): > return item > > def onAttach(self): > - pass > + for item in self.children: > + item.onAttach() > + w = self.getWidget() > + if w: > + w.onAttach() > > def onDetach(self): > - pass > + for item in self.children: > + item.onDetach() > + w = self.getWidget() > + if w: > + w.onDetach() > > def getChild(self, index): > if (index < 0) or (index >= len(self.children)): > > so, the question that i have is very simple: is this the right thing > to do? remember that, as we didn't design the GWT UI widget > infrastructure (merely "port" it pretty much verbatim to python), > analysing the implications of issues such as this is somewhat outside > of our... scope / resources / time / "community abilities" shall we > say. > > plus, i believe it's important to raise this with the GWT community > not least because someone else in the GWT community may wish to do > exactly the same thing: have TreeItems where the widgets within them > bloody well work! :) > > i'd be interested to hear the thoughts of the GWT community on this > issue. fyi read-only archive of pyjamas-dev exact same topic is > here:http://groups.google.com/group/pyjamas-dev/browse_thread/thread/b69ad... > > l. -- 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.
