ExtJs: Programly select rows of a GridPanel in an inactive tab not working? -

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basicly, have window contains 2 tabs, second tab gridpanel , inactive.

i want programly select 2 rows of gridpanel(via checkboxselectionmodel) clicking "show window" button , found not working. there javascript error thrown , no rows selected. after manually clicked second tab make grid visible, works well.

what's possible mistake made? i'll paste code if it's not common mistake extjs beginner.

this because tabpanel not render components not visible (i.e., components in second tab in case).

if add following config option ext.tabpanel should fix problem:

deferredrender: false


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