On 28 Aug 2014, at 15:01, Keary Suska <[email protected]> wrote:
> On Aug 28, 2014, at 7:20 AM, Ben <[email protected]> wrote: > >> I'm trying to make a tool for myself to fill in some repetitive forms. >> They've got a custom paper size with a series of boxes to be filled in. >> >> Given that I know the dimensions of the paper and the locations and >> dimensions of the boxes to fill in, I should be able to draw a view that >> prints onto these sheets. However, I'm getting lost in the printing system >> trying to figure out what steps I need to take to get this working. >> >> I don't understand how to go from the physical paper size (say 80mm wide, >> 150mm tall) to the paper size Cocoa wants in points. Is there a method that >> gives a scaling factor from points to any physical unit? >> >> I'll also need to precisely position drawn strings in the view to print, so >> will presumably need to translate points to physical dimensions when drawing >> too. >> >> Can anyone point me to something that might explain how to proceed here? > > As the docs say, sizes are measured in the user coordinate space: > https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/CocoaDrawingGuide/Transforms/Transforms.html#//apple_ref/doc/uid/TP40003290-CH204-SW5 > > This guide is important to read as well. > I've read that before, but not thought to apply it to print devices. If I understand correctly, I should basically just work everything out at 72dpi (the assumed user space scale) and let the system sort out the scaling for the printer? So for my case, assuming 72dpi ≈ 2.8 dots/mm: The paper being 80mm wide should be set to 224 points wide To inset a label by 10mm from an edge, I should inset by 28 points? Am I understanding this right? _______________________________________________ Cocoa-dev mailing list ([email protected]) 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 [email protected]
