Looks like your plug-in is being running as a tool without a connection to
the window server.
On 01/29/2009 3:54 PM, "Bridger Maxwell" <[email protected]> wrote:
> It turns out the error is completely different from what I thought it was
> (isn't it always?). It turns out Xcode was omitting part of the output from
> IBTool. When I tried to compile my xib from Terminal, I got this error:
>
> Description: ibtool encountered an error while loading the ibplugin from
> /Users/bridger/Development/Mercury/MercuryStation/build/Debug/SCMercury.framew
> ork/Versions/A/Resources/SCThemes.ibplugin.
> Error: Error Domain=com.apple.InterfaceBuilder Code=-1 UserInfo=0x6e9e90
> "Interface Builder could not load the 'Themes' plug-in because an exception
> was raised.
>
> Exception name: NSInternalInconsistencyException
> Reason: Error (1002) creating CGSWindow"
>
> I Googled around a bit, and I know it has something to do with drawing. In
> fact, I have narrowed it down to these lines of code:
>
> NSImage * canvas = [[NSImage alloc] initWithSize: canvas_size];
>
> [canvas lockFocus];
>
> ...
>
> [canvas unlockFocus];
>
>
> This is a vital part of my plugin though. I use this in an NSImage category
> which crops an NSImage. Why does lockFocus cause IB compilation errors, and
> can how can I fix it?
>
>
> Also, here is the NSImage category in its entirety. I actually took it from
> someone else on this list a while back.
>
>
> - (NSImage *) imageFromRect: (NSRect) rect
>
> {
>
> NSAffineTransform * xform = [NSAffineTransform transform];
>
> // translate reference frame to map rectangle 'rect' into first
> quadrant
>
> [xform translateXBy: -rect.origin.x
>
> yBy: -rect.origin.y];
>
>
>
> NSSize canvas_size = [xform transformSize: rect.size];
>
> NSImage * canvas = [[NSImage alloc] initWithSize: canvas_size];
>
> [canvas lockFocus];
>
> [xform concat];
>
>
>
> // Get NSImageRep of image
>
> NSImageRep * rep = [self bestRepresentationForDevice: nil];
>
>
> [rep drawAtPoint: NSZeroPoint];
>
>
>
> [canvas unlockFocus];
>
> return [canvas autorelease];
>
> return nil;
>
> }
>
>
> Thank You,
>
> Bridger Maxwell
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