On Jun 13, 2007, at 3:15 AM, Godwin, Mark R wrote:
Hi All,
I need to get a notification from a pop-up button when it has been
changed, i.e. when the user selects an item from the pop-up button’s
menu, but I don’t want to use the ‘Command’ generated from the menu
item itself (as they are dynamically genereated, and don’t have
Commands). Instead, I want the index of the item selected and the
Pop-up control ref to identify the control.
I’ve experimented with the kEventMenuClosed event, which seems to
almost work, but the Control Value of the control when this event is
processed has not been updated to the new value yet.
I assume there must be an event, (in kEventClassControl?) which the
control itself is handling to know when to redraw, change the active
item, etc., but I can’t find out what that message is. I’m guessing
I have to install an event handler for this message, and then call
CallNextEventHandler() to pass the message through to the control,
before calling GetControl32BitValue() to get the updated value.
You should be able to use a kEventControlHit event handler on the
popup button control. When you get that event, call
GetControl32BitValue to get the value of the control; the control
value corresponds to the index of the selected menu item.
-eric
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