Event Objects Return 1-Based Y Coordinate Values
Event Objects Return 1-Based Y Coordinate Values
- Subject: Event Objects Return 1-Based Y Coordinate Values
- From: Richard Somers <email@hidden>
- Date: Sat, 25 Jun 2011 08:59:33 -0600
The Cocoa Drawing Guide states "Cocoa event objects return y coordinate values that are 1-based instead of 0-based. Thus, a mouse click on the bottom left corner of a window or view would yield the point (0, 1) in Cocoa and not (0, 0). Only y-coordinates are 1-based."
Why are the y-coordianate values of Cocoa event objects 1-based?
Do most developers simply subtract 1.0 from the y-coordianate value obtained from an event object to make it 0-based before using the x-y-coordinate values?
--Richard
_______________________________________________
Cocoa-dev mailing list (email@hidden)
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:
This email sent to email@hidden