Thread-topic: Using Cocoa cursors in a Carbon world
User-agent: Microsoft-Entourage/11.3.6.070618
Just to post an idea that I'm investigating. I see that the actual
"original" Cocoa cursor that I was discussing is created by creating an
NSImage and copying a CGImage into it via:
// From "Cocoa Drawing Guide: Working with Images"
static NSImage *CreateNSImageFromCGImage( CGImageRef image )
{
NSAutoreleasePool* localPool = NULL;
localPool = [[NSAutoreleasePool alloc] init];
NSRect imageRect = NSMakeRect(0.0, 0.0, 0.0, 0.0);
// Get the image dimensions.
imageRect.size.height = CGImageGetHeight(image);
imageRect.size.width = CGImageGetWidth(image);
// Create a new image to receive the Quartz image data.
NSImage *newImage = [[NSImage alloc] initWithSize:imageRect.size];
[newImage lockFocus];
// Get the Quartz context and draw.
CGContextRef imageContext = (CGContextRef) [[NSGraphicsContext
currentContext] graphicsPort];
CGContextDrawImage( imageContext, *(CGRect*)&imageRect, image );
[newImage unlockFocus];
[localPool release];
return( newImage );
}
Could this be the problem? I'm going to look into it, but if let me know if
you *know* better ;)
I'll let you know what I find out.
Thanks,
Lyndsey
On 8/28/07 9:36 PM, "Lyndsey Ferguson" <email@hidden> wrote:
> Unfortunately, he's gone and we are experiencing some issues. It seems that
> on the PowerPC (Tiger and Leopard), when the application switches the cursor
> from a Carbon cursor (via MacGetCursor and MacSetCursor) to a Cocoa cursor
> (via NSImage to NSCursor and NSCursor's -set function) one can see a flicker
> of the Carbon cursor in the vicinity of the mouse position (not where the
> hotspot is).
>
> I thought that perhaps the issue was switching between the two types. So as
> a test, I changed the code to not switch to a Carbon cursor ever, but switch
> to another Cocoa based cursor. Flicker was gone. Yay, I thought.
--
Mr. Lyndsey D. Ferguson
Software Engineer
Nemetschek N.A., Inc.
http://www.nemetschek.net
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