On Jul 19, 2009, at 7:38 PM, Daniel Child wrote:
I am confused by what seem to be two possible approaches to placing
popup button cells into a table.
If I understand the documentation, one can:
a) set the popup button cell as the data cell of the (subclassed)
column
OR
b) return the popup button cell in the table datasource method:
- (id) tableView: (NSTableView *) tableView
objectValueForTableColumn: (NSTableColumn *) tableColumn
row: (int) row
Which is considered the correct approach?
A isn't quite right. Not exactly. It depends on what you're trying
to accomplish. Columns tend to show one kind of data, so you set the
data cell of a table column (you don't need to subclass NSTableColumn)
in code or in Interface Builder.
B is absolutely wrong. The -tableView:objectValueForTableColumn:row:
datasource method is a way for you to return the **objectValue** as
the name suggests (and the document clearly states), not the cell to
use to display this data.
You might be confusing this (B) with the NSTableView delegate method
-tableView:willDisplayCell:forTableColumn:row: where you can
substitute cells at will. This probably less efficient, especially if
your entire column will always use one kind of cell (ie, the "Employee
Department" column is always a popup, populated with all the
departments).
All that to say this: You need to re-read the documentation because
you've misunderstood some important concepts.
Is there a basic tutorial on this?
Dozens. Use Google.
--
I.S.
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