Thanks a lot Graham and John! That did it :-)
2011/10/18 Graham Cox <graham....@bigpond.com>: > > On 18/10/2011, at 5:59 AM, John Pannell wrote: > >> Hi Nick- >> >> There is some composition of views needed to make this work. Within >> GCDrawKit, find the GCZoomView class… make your custom view a subview of >> this (to adopt all of its zoomy goodness). Then, make your custom drawing >> view the documentView of an NSScrollView. >> >> You'll now need to wire up some controls in the UI (i.e. some menu items or >> buttons) to call the various zooming methods that your view has now >> inherited from GCZoomView. Once you're wired up correctly, everything will >> "just work" - the scroll view will respond to the size changes of your >> document, and your drawing will now scale up and down per the user's use of >> the controls you've provided. >> >> It is a really nice bit of code (thanks Graham!) > > > Thanks ; you're welcome :) > > GCZoomView is independent of DrawKit, and can be downloaded and deployed > separately: http://apptree.net/gczoomview.htm > > There may be small differences between this and the version you get in DK > however - DK's copy is possibly slightly more up to date. > > >> The problem is i don't know how would it be right to implement Zooming >> (similar to how graphics editors do it - by allowing the user to >> select some area of the view with a selection rectangle, and, after >> the mouseUp event happens, zoom in or out the view that is contained >> within an NSScrollView. > > GCZoomView will help you do this, but it doesn't implement the mouse dragging > part, you'll have to do that yourself in order to define the rectangle, then > you can use [GCZoomView zoomViewToRect:] to adjust the zoom scale and scroll > to that rectangle. The zooming does not change the coordinate system of the > view itself, the view content is not aware of the zoom unless you > deliberately code it to be so. > > --Graham _______________________________________________ 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
