[Drawkit] changing font

[James Maxwell]

On 26-Jun-08, at 6:04 PM, Graham Cox wrote:

>
> On 27 Jun 2008, at 7:19 am, James Maxwell wrote:
>
>> Okay, false alarm... I found the problem. Kind of strange, though.
>> I had set the font variable in my init code using a simple  
>> assignment. When I changed this to using the actual accessor - 
>> setGlyphFont: it worked properly. Does anybody understand why that  
>> would be? I'm glad I solved the problem, but it's a little  
>> disconcerting that I don't actually know *why* my solution  
>> worked. :-\
>
>
> I assume this is a method you wrote, since it's not part of Cocoa  
> nor DrawKit. So without seeing that code, I have no idea.

Yes, I wrote that method. I had a setFont method, but it came up with  
the blue font in xCode, so I figured it was being found in some super  
class somewhere... Anyway, it's working, so I'm not going to worry  
about it.
>
>
>> My best guess is that some super class uses Helvetica as a default  
>> (maybe NSObject holds a reference to some system font, somewhere?).  
>> Anyway, problem solved, for now.
>
> No, NSObject doesn't. But certainly some styles in DK do have text  
> and font attributes that use Helvetica as a default (though usually  
> at 18pt). However unless you are using these on purpose I'm not sure  
> why they would interfere with the normal process of creating shapes  
> and so on.

Well, I thought maybe it was from a style, but I'm really not sure how  
it could have got there. I'll worry about it if it comes up again, but  
it's fine for now.
>
>
>>
>> On another note, I'm trying to refine this process of using glyphs  
>> for objects - these are all music notation objects, taken from a  
>> free music font - and I have one big question. Does anyone know if  
>> there's a simple way to have a DKDrawableShape adopt the bounds of  
>> a glyph? I'm finding I'm tweaking around a lot with these glyphs,  
>> trying to get them to draw properly, and to fit within the  
>> selection bounds of my DKDrawableShape, but it seems like there  
>> must be an easier way.
>
>
> Once you have a glyph as a bezier path, it is simply a path, with no  
> special properties that link it to a font or other textual  
> information. If you create the shape with that path (there are  
> convenience constructors to do this, for example  
> +drawableShapeWithBezierPath:) the bounds of the shape will be set  
> up as needed. Normally you don't have to fiddle about to get this to  
> work, so it sounds like you're doing too much or perhaps not  
> constructing the shape in the most straightforward manner. Again  
> it's hard to advise without seeing the code in question.

Okay, I don't see +drawableShapeWithBezierPath: but there is  
+drawableShapeWithPath:, which I'm assuming is what you mean. I'll  
give that a try later. I was basically hand-building my path from the  
glyph, using -appendBezierPathWithGlyph:, then using -setPath: from  
DK, but as I say, that leaves me to mess around with the bounds...  
I'll try the convenience method a little later.

Thanks,

J.


>
>
> cheers, Graham
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