Removing a tab from a tab set destroys tab content

[dbscott525]

GWT version: 2.5.0.
SmartGWT version: 3.1-p20130226

I would like to have a TabSet for which I can arbitrarily remove and add tabs.

Here is what I do in the code:

• add a tab with some content
• remove the tab
• add the tab back in

If I do this any content in the tab that I removed appears to be lost/destroyed. I can no longer access that content without getting exceptions.

(I have a sample program that demonstrates this but even though it’s a sample program it’s a little long. I will be happy to provide that code if needed.)

Additionally I get this warning message on the developer console when I remove the tab.

15:26:05.546:MUP4:WARN:DynamicForm:isc_DynamicForm_0:Attempt to access destroyed widget in the DOM - destroy() called at invalid time (eg: mid-draw) or invalid method called on destroy()d widget. Stack Trace:
    [a]MathFunction.getStackTrace(_1=>undef, _2=>undef, _3=>undef, _4=>undef, _5=>undef)
    Canvas.getHandle()
    Canvas.$p9()
    Canvas.draw(_1=>undef, undef, undef, undef, undef, undef, undef, undef)
    [a]MathFunction.invokeSuper(_1=>[Class DynamicForm], _2=>"draw", _3=>undef, _4=>undef, _5=>undef, _6=>undef, _7=>undef, _8=>undef, _9=>undef, _10=>undef)
    DynamicForm.draw(_1=>undef, _2=>undef, _3=>undef, _4=>undef)
    Layout.addMembers(_1=>[DynamicForm ID:isc_DynamicForm_0], _2=>undef, _3=>undef)
    Layout.addMember(_1=>[DynamicForm ID:isc_DynamicForm_0], _2=>undef, _3=>undef)
    TabSet.createPane(_1=>[DynamicForm ID:isc_DynamicForm_0], _2=>Obj{ID:isc_Tab_1})
    TabSet.addTabs(_1=>Array[1], _2=>1)
    TabSet.addTab(_1=>Obj{ID:isc_Tab_1}, _2=>undef)
    anonymous(tabJS=>Obj{ID:isc_Tab_1})
    anonymous(thisObj=>IButton{ID: "isc_IButton_3",
title: "add tab",
position: "absolute",
left: 345,
redrawOnResize: false,
styleName: null,
parentElement: [HLayout ID:isc_HLayout_0],
topElement: [VLayout ID:isc_VLayout_0],
tabIndex: 1358,
cacheOffsetCoords: true,
zIndex: 200108,
state: "Over",
hasFocus: true,
},

. . . 

(Much more similar stuff in the log)

Some questions:

• Is this the expected behavior?
• Is there a recommended way to make tabs disappear and reappear without having to rebuild the tab and the content of the tab every time the tab is added back in?

[Isomorphic]

Set destroyPanes:false, or, use updateTab to set the pane to null before removing the tab.

[dbscott525]

Set destroyPanes:false, or, use updateTab to set the pane to null before removing the tab.

This worked like a charm. Thank you for your amazingly quick, accurate, and succinct response!