objective c - NSView containing NSOpenGLView doesn't redraw after a subview is removed -

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i have mac os x (10.9) application custom nsview main nswindow's contentview property. thing custom view override drawrect: it's transparent. transparency required nsopenglview visible (see below):

/* transparent nsview subclass */ - (void)drawrect:(nsrect)dirtyrect {   nslog(@"drawing rect");   [[nscolor clearcolor] set];   nsrectfillusingoperation(dirtyrect, nscompositeclear); }

the contentview has nsopenglview subview, surface order set -1 (it's 'below' main nswindow, transparent):

/* nsopenglview subclass: */ glint order = -1; [self.openglcontext setvalues:&order forparameter:nsopenglcpsurfaceorder];

i instantiate webview , place subview of custom view:

_webview = [[webview alloc] initwithframe:frame]; [_webview setmaintainsbackforwardlist:no]; [_webview settranslatesautoresizingmaskintoconstraints:no]; [_webview setdrawsbackground:no]; [_window.contentview addsubview:_webview];

the webview small box in window (on top of nsopenglview) used login service. once login happens should disappear, showing nsopenglview.

here's problem: when call [_webview removefromsuperview]; contentview not redraw; therefore, webview still drawn on screen (although not responsive mouse or keyboard). if use mouse resize window in, contentview redraws (i see message in logs) , webview's content disappears. also, if don't add nsopenglview subview, webview goes away should.

shouldn't contentview fire drawrect after subview removed? when used setneedsdisplay: or setneedslayout: after removing webview contentview still didn't redraw.

apple's advice these days use core animation layers put normal views on top of opengl views.

i suspect content view has redrawn itself. draws clear. you're seeing opengl surface behind it. nearly-raw-vram nature of opengl surfaces may mean web view drawn on top of modified contents of surface. so, recommend force opengl view redraw itself. if draws in -drawrect:, should enough send -setneedsdisplay:. if rendering outside of -drawrect: manually making context current, issuing rendering commands, , calling -flushbuffer, you'll need that.


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