osx - Accessing the windowing system on Mac -

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i have exhaustedly searched web way or tutorial or documentation or manual use directly quartz compositor, windowing system mac... here's want: when program using qt example, create widget becomes window in app , paints etc..., want code widget directly. i've been programming. want use lowest level of graphical programming can in computer, no matter how complicated may be. i'm beginning quartz compositor because i'm using mac. in advance.


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