> On Sep 23, 2013, at 9:09 AM, Peter Teeson <ptee...@icloud.com> wrote: > > My questions: > (0) Given the above documentation why is the matrix drawn at top left > (indented of course)?
What’s _theMatrix’s frame? It could either have an origin that puts it at the top, or it could draw its content in its upper-left and have a size that fills the superview, or its superview could return YES from -isFlipped. > The default location is stated to be lower left. See -[NSView isFlipped]. > > (1) Is the contentView's superView the screen? No, it’s the window’s private NSThemeFrame, or nil if the window is borderless. Windows and screens are not views. > And thus the contentView uses the screen's origin co-ordinates which are top > left? Flippedness does not cascade; every NSView’s bounds coordinate system is independent. If a view returns NO from -isFlipped, then drawing at (0,0) in that view’s bounds will always draw at the lower left of that view, regardless of whether any ancestors return YES from -isFlipped. --Kyle Sluder _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
