Re: Flipped print previews
Re: Flipped print previews
- Subject: Re: Flipped print previews
- From: "Gary L. Wade" <email@hidden>
- Date: Sun, 20 Nov 2016 23:43:09 -0800
I remembered seeing something like that in an app that had been doing some things deep with the drawRect: call that was causing the view to become dirty again. I fixed it by getting rid of that code. Try looking for something like that first.
--
Gary L. Wade (Sent from my iPhone)
http://www.garywade.com/
> On Nov 20, 2016, at 9:33 PM, Jeff Evans <email@hidden> wrote:
>
> p.s. As I was unclear: the image returns YES to flipped and draws on that assumption, looking good. When I say the image in the print dialog is "flipped" I mean that it is backwards - mirrored - the reverse of what it should be - as if it were an unflipped view - until it is drawn a second time.
> ----
>
> I'm printing from a view-based OSX app (compiled for 10.11), and have found it easy to print by creating a print operation from the view in question. The view is flipped (that is, returns YES to IsFlipped) and looks good on screen. The view creates a print operation this way:
>
> NSPrintOperation* printOp = [NSPrintOperationWithView: self printInfo: [NSPrintInfo sharedPrintInfo]];
>
> //..then setting of margins, etc. in [printOp printInfo], then
>
> [printOp runOperation]
>
> Running the operation does the whole thing and creates a beautiful preview of the page -
>
> BUT not on the first draw. The initial image displayed in the print dialog is flipped and often reduced to miniature. If you touch the pages-to-print choice, or the All choice, the preview image in the print dialog redraws and redraws correctly. The actual print then works fine.
>
> This does make it more difficult print to pdf when the first draw is wrong, since the pdf is also wrong on the first draw. But if I choose "view pdf in preview" then all is well - it draws nicely and I can then use Preview's export command to save it, or print.
>
> But this is no way to live. Don't want to have to tell customers to use a work-around.
>
> There must be something that needs initializing that is corrected after that first draw. Or is this just a glitch?
>
>
> Thanks, Jeff
>
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