Re: NSView vs CALayer

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
>>>
>>> _______________________________________________
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>>> 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
> 
> _______________________________________________
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> 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.
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