[Openmcl-devel] Using the COCOA BRIDGE

[R. Matthew Emerson]

> On Jun 30, 2017, at 10:37 AM, Oscar Chappel <oachappel at yahoo.com> wrote:
> 
> Hello,
> I have just implemented the show-red-window function described in the COCOA BRIDGE page.  When I execute the function I get an instance of the RED-VIEW class that I can inspect and describe.  I can not get this instance to display itself.  Here is the source code:
> 
> (in-package "CL-USER")
> 
> (require "COCOA")
> 
> (defclass red-view (ns:ns-view)
>  ()
>  (:metaclass ns:+ns-object))
> 
> (objc:defmethod (#/drawRect: :void) ((self red-view) (rect :<NSR>ect))
>  (#/set (#/redColor ns:ns-color))
>  (#_NSRectFill (#/bounds self)))
> 
> (defun show-red-window ()
>  (ccl::with-autorelease-pool
>      (let* ((rect (ns:make-ns-rect 0 0 300 300))
>             (w (make-instance 'ns:ns-window
>                  :with-content-rect rect
>                  :style-mask (logior #$NSTitledWindowMask
>                                      #$NSClosableWindowMask
>                                      #$NSMiniaturizableWindowMask)
>                  :backing #$NSBackingStoreBuffered
>                  :defer t)))
>        (#/setTitle: w #@"Red Window")
>        (#/setContentView: w (#/autorelease (make-instance 'red-view)))
>        (#/center w)
>        (#/orderFront: w nil)
>        (#/contentView w))))


In general, UI operations must be performed on the main/initial thread.  This is a requirement imposed by Cocoa.

On older versions of the system, sometimes you could get away with calling certain UI operations from other threads.

You can use gui:execute-in-gui to call a function on the main thread.

So, (gui:execute-in-gui #'(lambda () (show-red-window))) ought to work.




> 
> The results of executing show-red-window and describing the resulting instance:
> 
> (setf win (show-red-window))
> #<RED-VIEW <RedView: 0x6180001203c0> (#x6180001203C0)>
> ? win
> #<RED-VIEW <RedView: 0x6180001203c0> (#x6180001203C0)>
> ? (describe win)
> #<RED-VIEW <RedView: 0x6180001203c0> (#x6180001203C0)>
> Class: #<OBJC:OBJC-CLASS RED-VIEW (#x60800005C020)>
> Wrapper: #<CCL::CLASS-WRAPPER RED-VIEW #x302000EB514D>
> Instance slots
> NS:ISA: #<A Foreign Pointer #x1DE0800005C021>
> NS:_NEXT-RESPONDER: #<NS-WINDOW <NSWindow: 0x6100001ed200> (#x6100001ED200)>
> NS:_FRAME: #<NS-RECT 300 X 300 @ 0,0 (#x6180001203D0) #x302000F7B72D>
> NS:_BOUNDS: #<NS-RECT 300 X 300 @ 0,0 (#x6180001203F0) #x302000F7ADDD>
> NS:_SUPERVIEW: #<NS-VIEW <NSThemeFrame: 0x306192f0> (#x306192F0)>
> NS:_SUBVIEWS: #<A Null Foreign Pointer>
> NS:_WINDOW: #<NS-WINDOW <NSWindow: 0x6100001ed200> (#x6100001ED200)>
> NS:_G-STATE: #<A Null Foreign Pointer>
> NS:_FRAME-MATRIX: #<A Null Foreign Pointer>
> NS:_LAYER: #<A Null Foreign Pointer>
> NS:_DRAG-TYPES: #<A Null Foreign Pointer>
> NS:_VIEW-AUXILIARY: #<A Foreign Pointer (:*
>                                         (:STRUCT
>                                          :_<NSV>IEW<A>UXILIARY)) #x2191340>
> NS:_V-FLAGS: #<A Foreign Pointer (:* (:STRUCT :__<VF>LAGS)) #x618000120450>
> NS:_V-FLAGS-2: #<A Foreign Pointer (:* (:STRUCT :__<VF>LAGS2)) #x618000120454>
> 
> Am I missing something?  Can anyone help me out?  Thanks.
> 
> Oscar Chappel
> 
> 
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