Bug 427968

Description Christian Hager 2014-02-12 04:09:14 EST

Created attachment 239852 [details]
Demo to reproduce the Bug

The TabFolder crashes when a previously disposed TabItem is readded reusing the contents of the original TabItem. Doing the same with the CTabFolder everything works just fine.

I added a Sample-App to reproduce this behaviour. 

Steps to reproduce:
1. Toggle the Tab using the Button to remove the second TabItem
2. Toggleing the Tab again will make the TabItem reappear but not it's contents
3. Now switching back and forth between the Tabs creates the following error

Error: Error: Operation "set" on target "w9" of type "rwt.widgets.Composite" failed:
Cannot set property 'left' of null
Properties: 
bounds = 1,34,1908,400
visibility = true
clientArea = 0,0,1908,400


  Script: {"head":{"requestCounter":5},"operations":[["set","w6",{"visibility":false}],["set","w9",{"bounds":[1,34,1908,400],"visibility":true,"clientArea":[0,0,1908,400]}],["set","w10",{"bounds":[0,0,1908,400],"visibility":true}]]}
  Stack: Error: Operation "set" on target "w9" of type "rwt.widgets.Composite" failed:
Cannot set property 'left' of null
Properties: 
bounds = 1,34,1908,400
visibility = true
clientArea = 0,0,1908,400

    at Object.rwt.remote.MessageProcessor._processError (http://127.0.0.1:10080/rwt-resources/rap-client.js:229:3817)
    at Object.rwt.remote.MessageProcessor.processOperationArray (http://127.0.0.1:10080/rwt-resources/rap-client.js:229:928)
    at Object.rwt.remote.MessageProcessor.processMessage (http://127.0.0.1:10080/rwt-resources/rap-client.js:229:223)
    at rwt.qx.Class.define.members._handleSuccess (http://127.0.0.1:10080/rwt-resources/rap-client.js:233:3550)
    at Object._success (http://127.0.0.1:10080/rwt-resources/rap-client.js:97:1012)
    at Object.rwt.remote.Request._onReadyStateChange (http://127.0.0.1:10080/rwt-resources/rap-client.js:97:1902)
    at XMLHttpRequest.d (http://127.0.0.1:10080/rwt-resources/rap-client.js:14:522)
  Debug: off
  Request: {"head":{"requestCounter":4},"operations":[["set","w4",{"selection":"w19"}],["notify","w4","Selection",{"item":"w19","shiftKey":false,"ctrlKey":false,"altKey":false}],["set","w1",{"cursorLocation":[82,58]}]]}
  Phase: 5


I Tested using RAP 2.2 as well as todays Nightly-Build. Both behave the same way. If I use the CTabFolder instead everything works fine.