Re: [Leopard] bug in [NSGraphicsContext attributes]
Re: [Leopard] bug in [NSGraphicsContext attributes]
- Subject: Re: [Leopard] bug in [NSGraphicsContext attributes]
- From: Michael Monscheuer <email@hidden>
- Date: Wed, 07 Nov 2007 14:58:00 +0100
Hi!
> This will not help if your goal is to distinguish between printing to
> a printer and printing to a PDF.
Right. We use -[NSGraphicsContext attributes] *and* -[NSGraphicsContext isDrawingToScreen]
on the current graphics context in -[NSView drawRect:] methods to distinguish between
screen, PDF, PS and manual bitmap contexts.
I filed a report (Bug ID# 5584898) with a simple example app attached.
I managed to find a workaround by (mis)using an existing hack in our app.
But I don't like hacks. Would feel better to be able to use the official API...
Michael
Ken Ferry schrieb:
Hi Michael,
Yes, please file a bug if something changed here.
Would -[NSGraphicsContext isDrawingToScreen] work for you? It really
has more to do with whether the destination context is pixel-based
than with whether it's the screen.
"A return value of NO may mean that the drawing destination is a
printer, but the destination may also be a PDF or EPS file."
This will not help if your goal is to distinguish between printing to
a printer and printing to a PDF.
-Ken
Cocoa Frameworks
On Nov 6, 2007 5:02 AM, Michael Monscheuer <email@hidden> wrote:
Hi!
When creating an NSGraphicsContext using -graphicsContextWithGraphicsPort:flipped:
with a CGPDFContext as graphics port, the dictionary returned by -attributes
of the created NSGraphicsContext no longer contains the documented key-value pairs.
In Tiger the attribute dict contains keys like
NSGraphicsContextRepresentationFormatAttributeName and
NSGraphicsContextDestinationAttributeName.
In Leopard no more.
If you rely on these keys and values, I'd suggest to check your apps.
As this bug also affects possible analysis while printing:
Any ideas how to find out if current context's graphics port
(e.g. while printing a PDF via NSPrintPanel) is a PDF context or not?
Michael
P.S.: Yes, I will file a bug report for sure :-)
---
Michael Monscheuer
www.icalamus.net
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