Re: Overlapping Views

FROM : David Alger
DATE : Fri Nov 23 18:03:56 2007

On Nov 23, 2007, at 10:01 AM, Alastair Houghton wrote:

> On 23 Nov 2007, at 07:09, Jon Hess wrote:
>

>> NSView fully supports overlapping sibling views on Leopard and later.

>
> I know it's been a common request for ages on the list, but I've 
> never quite been sure why people are so keen on being able to have 
> overlapping sibling views.  If one is completely contained within 
> the other, the parent-child relationship seems cleaner (and has 
> always worked); and if that isn't possible then surely in most cases 
> it's going to look ugly?
>
> So, out of interest, David, what were you trying to achieve that 
> needed overlapping views?


This particular app would be a full-screen app. The main window, 
covering most if not all of the screen, would have a background image 
with other controls directly on top of it. They would be customized to 
the extent I could in IB & sub-classed if necessary, which I know that 
I will have to do to achieve the behavior & appearance I want in some. 
Since the NSImage view doesn't support sub-views (I'm assuming it 
doesn't since IB won't let me put any in it), I was trying to have the 
NSImage view behind the other views so I wouldn't have to customize a 
NSView & draw the image manually.

This will be my very first app written in Cocoa/Obj-C, and I'm very 
used to having compositing views in Carbon. I won't be overlapping 
views like this though if it isn't really supported, since I don't 
want my app to possibly have erratic drawing/refresh behavior.


Regards,
David Alger

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