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Re: Vertically Centered Colon
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Re: Vertically Centered Colon


  • Subject: Re: Vertically Centered Colon
  • From: Alastair Houghton <email@hidden>
  • Date: Mon, 28 Nov 2016 16:42:42 +0000

On 28 Nov 2016, at 16:18, Gerriet M. Denkmann <email@hidden> wrote:
>
>
>> On 28 Nov 2016, at 22:13, Eric E. Dolecki <email@hidden> wrote:
>>
>> You could probably use an attributed string and add an attribute for the last colon: NSBaselineOffsetAttributeName
>
> Yes; but this would be some rather desperate work-around.
>
> I was rather thinking of UIFontDescriptorFeatureSettingsAttribute with some Feature type from SFNTLayoutTypes.h (in CoreText).
> I tried a few types, but no success so far.

The problem you’ve got is that unless the font has a feature that specifically allows you to change *any* colon (as opposed to a colon between two numerals), you aren’t going to be able to do it by turning on an OpenType feature.  Even if you can, there doesn’t appear to be a standard feature code for this, so you’d be reliant on Apple not changing it in the future.

What you *could* do instead is get Core Text (or Cocoa Text) to lay out a string e.g. "12:00”, then grab the glyph for the centred colon directly from that string and use it explicitly, e.g. by attaching a kCTGlyphInfoAttributeName attribute to your string with the value set to an appropriately constructed CTGlyphInfoRef.

Kind regards,

Alastair.

--
http://alastairs-place.net


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  • Follow-Ups:
    • Re: Vertically Centered Colon
      • From: "Gerriet M. Denkmann" <email@hidden>
    • Re: Vertically Centered Colon
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References: 
 >Vertically Centered Colon (From: "Gerriet M. Denkmann" <email@hidden>)
 >Re: Vertically Centered Colon (From: "Eric E. Dolecki" <email@hidden>)
 >Re: Vertically Centered Colon (From: "Gerriet M. Denkmann" <email@hidden>)

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