Re: Taking screen shots
Re: Taking screen shots
- Subject: Re: Taking screen shots
- From: Kevin Meaney <email@hidden>
- Date: Wed, 18 Jun 2014 17:01:37 +0100
On Jun 18, 2014, at 8:36 AM, Kevin Meaney <email@hidden> wrote:
>>
>> The sequence of events are:
>>
>> 1. Drag window so that it is partially offscreen.
>> 2. Draw into the window where part of the drawing happens in the part of the window that is offscreen.
>
> Ok, what does this mean? In AppKit, you don’t draw into a window; the window asks you to draw. If you mean that you’re sending -drawRect: to the view yourself, that will never work.
Drawing happens when I receive an xpc message containing a drawing command. To do the drawing I get the NSGraphicsContext from which I pull the graphicsPort which is a special kind of CGContext. I then use CoreGraphics commands to do the drawing.
I looked at SonOfGrab when I first implemented this, so I'm looking at it again to see if it can provide some clues.
Kevin
> It’s also possible that CGWindowList doesn’t force a window to draw its entire area. Do you get the same results with the SonOfGrab sample project? <https://developer.apple.com/library/mac/samplecode/SonOfGrab/Listings/Controller_m.html#//apple_ref/doc/uid/DTS10004490-Controller_m-DontLinkElementID_4>
>
> --Kyle Sluder
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