Re: NSView vs CALayer

Christiaan Hofman-2 wrote:
> 
> 
> On Sep 29, 2009, at 19:25, parfeon wrote:
> 
>>
>>
>>
>> Christiaan Hofman-2 wrote:
>>>
>>>
>>> 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
>>
>> I see. Thats not good. I need somehow to reproduce such effect like  
>> in drag
>> .torrent file over Transmission (appears transparent background  
>> which cover
>> whole interface). Is there any well known practice for creating such
>> overlay? I was trying to find something like that, but no w/o no luck.
>>
> 
> The standard practice is to overlay a transparent borderless child  
> window.
> 
>> Ah, there is another reason of creating this cover layer. As I can  
>> found in
>> documentations, registration for   dragNdrop files from outside of
>> application to inside available only for NSView.
>>
>> Application delegate class can handle dragNdrop on dock icon, as for
>> application window itself... I found useful methods inside NSView  
>> class.
>>
> 
> 
> Views and windows can implement the NSDraggingDestination protocol.
> 
> Christiaan
> 
> _______________________________________________
> MacOSX-dev mailing list
> [email protected]
> http://www.omnigroup.com/mailman/listinfo/macosx-dev
> 
> 

Wow, Christiaan thanks a lot for help!

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