UIView has some convenience methods you can use to convert a CGRect to and from different views’ coordinate systems. Look at the documentation for -convertRect:fromView:<http://developer.apple.com/library/ios/documentation/uikit/reference/UIView_Class/UIView/UIView.html#//apple_ref/doc/uid/TP40006816-CH3-BBCDBGGG>for an example. Now, UIScreen isn’t a view, but you can probably combine its -applicationFrameinstance method with the UIWindow (which *is* a view) to get something approximating the screen’s frame relative to your view’s coordinate system (which is what I think you’re asking for).
Jeff Kelley On Fri, Jul 1, 2011 at 2:43 PM, Development <developm...@fornextsoft.com>wrote: > I am sure I am missing something simple but I've tried everything I can > find > > > I need to convert a rectangle in a NSView to a corresponding rectangle in > screen coordinates. > > originally I was using this code: > > selected.origin.x = selection.origin.x / ([imageView > frame].size.width/screen.size.width); > selected.origin.y = selection.origin.y / ([imageView > frame].size.height/screen.size.height)+25; > selected.size.height = selection.size.height / ([imageView > frame].size.height/screen.size.height); > selected.size.width = selection.size.width / ([imageView > frame].size.width/screen.size.width); > > > and it worked. However I have had to change the means by which I was > capturing the screen to CGDisplayCreateImageForRect > > I want to select an area in a view that represents the entire screen. I > need that rectangle then to be translated to the correct size and origin in > screen coordinates. > > The above code creates a rectangle of the correct size but the origin is so > far off I cannot image how to fix it. > > I have tried having the view itself use convertRectToBase passing the > screen bounds. This creates a rectangle of the correct size but the origin > is always, no matter what, 15,183. > I'm totally lost here and don't even know what to search for now that my > other attempts have failed. > Could some one help me out? > I'm hoping to find something with low overhead as clicks are a factor. _______________________________________________ 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: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
