Re: NSView vs CALayer

On Sep 29, 2009, at 18:46, parfeon wrote:

>
>
>
> Christiaan Hofman-2 wrote:
>>
>>
>> On Sep 29, 2009, at 18:03, parfeon wrote:
>>
>>>
>>>
>>> Christiaan Hofman-2 wrote:
>>>>
>>>>
>>>> On Sep 29, 2009, at 12:32, parfeon wrote:
>>>>
>>>>>
>>>>> Hello everyone.
>>>>>
>>>>> Working on project which draws some parts of its UI with
>>>>> CoreAnimation
>>>>> CALayers. Currently i need create some cover view, which will  
>>>>> appear
>>>>> over
>>>>> whole UI (that NSView always there, coz it will response on user
>>>>> drag n
>>>>> drop).
>>>>> I'm stumbled with such problem as shown on screen
>>>>>
>>>>> http://www.nabble.com/file/p25659257/nsviewvscalayer.png
>>>>>
>>>>> http://img44.imageshack.us/i/nsviewvscalayer.png/
>>>>>
>>>>> Transparent view overlays the view in which I used CALayers for
>>>>> drawing.
>>>>> Dunno why, but when I change that subview (with CALayers) to any
>>>>> other (w/o
>>>>> CoreAnimation drawing... some standard IB elements) everything  
>>>>> looks
>>>>> great.
>>>>>
>>>>>
>>>>> Can someone help me with this?
>>>>>
>>>>> Thanks
>>>>
>>>> I really can't understand your message and in particular what your
>>>> specific problem is. But the basic fact is that layer-hosting views
>>>> cannot have subviews, so I guess that's where you run into.
>>>>
>>>> Christiaan
>>>>
>>>> _______________________________________________
>>>> MacOSX-dev mailing list
>>>> [email protected]
>>>> http://www.omnigroup.com/mailman/listinfo/macosx-dev
>>>>
>>>>
>>> Quoted from:
>>> http://www.nabble.com/NSView-vs-CALayer-tp25659257p25663495.html
>>>
>>>
>>> My bad. Will try to explain all what I have done. Currently I want
>>> try to
>>> make behavior of window like in Transmission when You drag
>>> over .torrent
>>> file (appears blacj cover with info on center)
>>>
>>> 1. I have XIB with such structure as shown on image:
>>> http://img21.imageshack.us/img21/2967/mainxibstructure.png . I've
>>> placed
>>> there split view (2 views inside). Left view used for displaying
>>> source list
>>> (as we can see here
>>> http://www.nabble.com/file/p25659257/nsviewvscalayer.png) and the
>>> right view
>>> i used for displaying information (Place Holder). And also there
>>> over that
>>> split view "Drag&Drop Layer" (custom NSView where with CA I'm  
>>> drawing
>>> transparent background);
>>> 2. After application do launch, my code placing inside "Place
>>> Holder" (with
>>> addSubview:) new custom view (instance of NSView placed in other XIB
>>> file);
>>> 3. On awakeFromNib that custom view creates CALayers and draws there
>>> content
>>> (background and buttons). On 'self' of custom view I'm setting
>>> setLayer to
>>> "baseLayer" (which holds all graphics) and then call
>>> setWantsLayer:YES;
>>> 4. And at the end we can see picture as I shown:
>>> http://www.nabble.com/file/p25659257/nsviewvscalayer.png It look's
>>> like
>>> "Drag&Drop Layer" cut out piece of custom view inside "Place  
>>> Holder".
>>>
>>> Here is the code which I use to insert custom view inside "Place
>>> Holder":
>>>
>>> - (void)changeViewTo:(id)view{
>>> 	if(currentView != [view view])
>>> 		currentView = nil;
>>> 	
>>> 	if([[placeHolderView subviews] count] == 0){
>>> 		[placeHolderView addSubview:[view view]];
>>> 	else
>>> 		[placeHolderView replaceSubview:[[placeHolderView subviews]
>>> objectAtIndex:0] with:[view view]];
>>> 	
>>> 	currentView = [view view];
>>> 	
>>> 	[currentView setFrame:[[currentView superview] frame]];
>>> 	
>>> 	[currentView setFrameOrigin:NSMakePoint(0,0)];
>>> 	[currentView setAutoresizingMask:NSViewWidthSizable |
>>> NSViewHeightSizable];
>>> }
>>>
>>> currentView - is type of NSView
>>> placeHolderView - is IBOutlet on "Place Holder" view of NSView class
>>>
>>> But when I'm adding inside placeHolder other custom view (which is
>>> inside
>>> loaded XIB) we can see this picture
>>> http://img182.imageshack.us/img182/1951/nsviewvsnsview.png In that
>>> view
>>> placed standard elements, which not drawn in real time.
>>>
>>> Sp till now I can't understand what I'm doing wrong. Can someone
>>> help with
>>> this?
>>
>> You still did not say what your problem is. What do you get? What do
>> you expect? What do you want to get? What do you think is wrong?
>> There's a lot of things going on, and I don't know which part is
>> relevant. And your Engrish also does not help.
>>
>> Perhaps you should try to reduce your problem to a much simpler  
>> model.
>>
>> Is the transparent overlay that partially covers the window the
>> CADragnDropView? In that case your setup makes no sense, because the
>> splitview and dragndropview  are overlapping sibling views, which is
>> not supported and generally results in a mess.
>>
>> Christiaan
>>
>> _______________________________________________
>> MacOSX-dev mailing list
>> [email protected]
>> http://www.omnigroup.com/mailman/listinfo/macosx-dev
>>
>>
>
>
> Yes, problem lies in that, what I can't make DragNDrop to be  
> transparent for
> view with content (I show that on screenshot). Ok, I got it, but why
> DragNDrop view is transparent when showing different views (with  
> content
> which not drown with CA). I'm just little bit confused about this,  
> at one
> hand it's work with other views, at another it doesn't want work  
> correct
> with another custom view. Thats why i thought what there something  
> wrong in
> methods which I use to draw or place this view.

You should not be confused: it's wrong, the result is undefined, so it  
just does not work. It is irrelevant in which way it goes wrong.

Christiaan