Re: NSCombobox subclass and binding ?
Re: NSCombobox subclass and binding ?
- Subject: Re: NSCombobox subclass and binding ?
- From: Scott Anguish <email@hidden>
- Date: Sat, 9 Jul 2005 00:22:46 -0400
On Jul 8, 2005, at 11:41 PM, Ricky Sharp wrote:
On Jul 8, 2005, at 5:15 PM, Robert Miller wrote:
I hope someone can help. I have a subclass of NSCombobox that
displays a custom resizable popup list instead of the standard
fixed size list. The subclass list populates fine when using an
internal list defined in a nib for the custom combo box class by
simply making the subclass box the data source of my table I can
do this:
- (int)numberOfRowsInTableView:(NSTableView *)aTableView
{
return [self numberOfItems];
}
- (id)tableView:(NSTableView *)aTableView
objectValueForTableColumn:(NSTableColumn *)aTableColumn row:(int)
rowIndex
{
return [self itemObjectValueAtIndex:rowIndex];
}
However, when bindings are attached to the subclass the list does
not populate. The question is how can I take advantage of
NSCombobox'es default binding and obtain the data from that
binding to populate the custom popup list ? Any help would be
greatly appreciated.
I don't think that is possible to do. When originally doing a
custom radio group (NSMatrix containing subclasses of
NSActionCell), I couldn't use the selectedTag or selectedIndex
bindings to get both model-initiated and view-initiated changes
handled. I remedied the problem by subclassing NSMatrix
(IIRadioGroup) and adding my own custom binding (selectedRadioTag).
Thus, look into adding a custom binding to your NSCombobox subclass.
you want be able to get information from the bindings that are
handled by the superclass? If you're on Tiger, send the combobox -
infoForBinding: with a binding name... if you want to run on pre
Tiger, it's ugly, You need to override the bind:... method and sock
away the info you want to keep and then pass it along to the
superclass implementation
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