Okay, I'm sure the answer to this is something simple that's going to
make me feel very silly once I figure it out, but for now I'm stumped.
To me, the code below looks like it should work:
- (void)drawRect:(NSRect)rect {
NSDictionary *attrs = [NSDictionary dictionaryWithObjectsAndKeys:
[NSFont fontWithName:@"Courier" size:
10.0], NSFontAttributeName,
[NSColor blueColor],
NSForegroundColorAttributeName, nil];
NSAttributedString *string = [[NSAttributedString alloc]
initWithString:@"Hello, World!" attributes:attrs];
CGContextRef context = [[NSGraphicsContext currentContext]
graphicsPort];
CTLineRef line =
CTLineCreateWithAttributedString((CFAttributedStringRef)string);
CGContextSetTextPosition(context, 100.0, 100.0);
CTLineDraw(line, context);
CFRelease(line);
[string release];
}
However, instead of 10 point Courier, the string ends up being drawn
at 144 point. Also, the characters are all smashed together - the X-
position of each letter appears to be in the place where it would be
if it *were* a smaller font size, causing them all to overlap with
each other. What's going on? If I use plain old [string drawAtPoint:],
the string of course draws exactly as it should. But I'm trying to get
CoreText to work, and according to the following page:
http://developer.apple.com/documentation/Carbon/Conceptual/CoreText_Programming/Operations/Operations.html#/
/apple_ref/doc/uid/TP40005533-CH4-DontLinkElementID_5
it looks like I should be able to do this just with
CTLineCreateWithAttributedString, CGContextSetTextPosition, and
CGLineDraw. However, it's not working.
I initially thought it was Cocoa's fault, and tried building attrs as
a CFDictionaryRef with a CTFontRef in it instead of an NSFont. Same
result. It uses the font face I specify, but uses a giant size and
smashes all the characters together.
What am I doing wrong?
Thanks,
Charles
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