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Stopping a Nav Services Choose Object sheet from closing

I want to stop a Nav Services Choose Object sheet from closing.

I want to select multiple items, and click the Choose (renamed to 'Add') button, and have the sheet remain open until such time as I click the Cancel button ('Done').

I am running into a problem: when I click the Choose (Add) button the sheet closes.

In my event call back I have the following code:


if ( kNavCBUserAction == callBackSelector )
{
if ( kNavUserActionChoose == callBackParms->userAction )
{
NavReplyRecord reply;
if ( noErr == ::NavDialogGetReply( callBackParms->context, &reply ) )
{
// Do stuff with the selection - works fine
}

// Was hoping this would prevent the close from happening
NavActionState navState = kNavDontChooseState;
::NavCustomControl( callBackParms->context, kNavCtlSetActionState, &navState );
}
}


I would also like to change the message and the button names within this event call back too, but I need to get the sheet to stay open first.

Do I need to add a window close carbon event handler onto the underlying nav services window and prevent the close event from being acted upon ?

Any suggestions anyone ?

Douglas
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