Alastair Hi.
Yes, sorry I didn't think properly when typing, NSCell is not a view, and
unfortunately Cocoa doesn't offer the option as UIKit to drag in IB a
("NSTableCell"), and just put all the controls there, then set the Identifier
to reuse, configure the cell and return the cell, in the delegate method... :(
So checking some examples, if I want to place some view in a cell I must pass
to the custom cell a weak reference of the view, then in the draWithRect method
add the view to the controlView?.. interesting..
I was drawing attributed strings instead.. but now i need to support selection
of that text.
I will give it a try then.
Thx
G.
On Jun 10, 2010, at 11:12 AM, Alastair Houghton wrote:
> On 10 Jun 2010, at 08:37, Gustavo Pizano wrote:
>
>> Well I have created custom table view cells in the way that I create my
>> subclass of NSCell, and then in the -(void)drawWithFrame:(NSRect)cellFrame
>> inView:(NSView *)controlView method I make the drawing.
>>
>> now i wonder if I can do it the iPHone way, create a xib with a NSCell view,
>> place the other views I need in the cell, and in the delegate of the
>> NSTableView method. - (NSCell *)tableView:(NSTableView *)tableView
>> dataCellForTableColumn:(NSTableColumn *)tableColumnrow:(NSInteger)row return
>> an instance of my custom cell .
>
> No. Or rather, you *could*, but you'd have to make a special NSCell that
> loaded the xib file, added all the views as subviews of the table view (in
> appropriate places) and conspired somehow to manage the set of views so that
> you didn't just end up adding/creating more and more views as the user
> scrolls around.
>
> The root of the problem is that NSCell is not a view, and moreover the table
> view may use the same cell over and over when drawing its rows.
>
>> Now what implications will this have if I using core data?, I will have an
>> NSArryaController as the dataSource for the table view, so my guess is that
>> when returning the cell instance, I must get the object from the
>> arrangedObject array of the NSArryaController at the given row.
>>
>> am I right, wrong? what else am I missing?
>
> Wrong. NSCell is not a view. There is not one NSCell per table "cell";
> generally speaking, NSCells are re-used, and so the data is set before
> drawing using -setObjectValue: or similar.
>
> If you do need views in a table view (e.g. because you want a progress
> indicator, or you want to do mouse tracking or something), there are plenty
> of examples:
>
> <http://www.google.co.uk/search?hl=en&source=hp&q=nsview+in+nstableview>
>
> For many applications, though, this is unnecessary and you should just use
> appropriate NSCell instances; if the provided NSCells and NSFormatters aren't
> sufficient for you, it's usually possible to write a custom NSCell that draws
> whatever it is you need.
>
> Kind regards,
>
> Alastair.
>
> --
> http://alastairs-place.net
>
>
>
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