Re: Event Objects Return 1-Based Y Coordinate Values
Re: Event Objects Return 1-Based Y Coordinate Values
- Subject: Re: Event Objects Return 1-Based Y Coordinate Values
- From: Raleigh Ledet <email@hidden>
- Date: Mon, 27 Jun 2011 10:26:54 -0700
Cocoa coordinates are all 0,0 based. If you have a reproducible test case that says otherwise, please file a radar and attach it.
-raleigh
On Jun 25, 2011, at 7:59 AM, Richard Somers wrote:
> 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
>
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