Re: NSFontManager Initialization

FROM : Aki Inoue
DATE : Mon Mar 03 23:01:54 2008

The standard idiom here is to implement -changeFont: method that 
receives action messages whenever user changes font selection.
In the method, you can call -convertFont: to query the user selection.
The result has to be kept in your object.
http://developer.apple.com/documentation/Cocoa/Conceptual/FontPanel/Tasks/UsingFontPanel.html#/
/apple_ref/doc/uid/20000836

Aki

On 2008/03/03, at 13:12, Gordon Apple wrote:

>    I guess I don't understand how to use that.  I have no font 
> specified.
> ConvertFont returns a similar font style (e.g., Italic) and size to 
> whatever
> you put into it.  What I want is to extract the user selected font 
> and size
> from the panel.  "selectedFont" does what I want, as long as it has 
> been
> used previously with text.  Here is what I am doing:
>
> -(void)addString:(NSString*)string toPath:(NSBezierPath*)path {
>    NSFontManager* fmgr = [NSFontManager sharedFontManager];
>
> //    NSFont* theFont = [fmgr selectedFont];
>    NSFont* theFont = [fmgr convertFont:[NSFont systemFontOfSize:50]];
>
>    NSBezierPath* stringPath = [string bezierWithFont:theFont];
>    NSAffineTransform* tf = [NSAffineTransform transform];
>    [tf scaleXBy:1 yBy:-1];
>    NSBezierPath* uppath = [tf transformBezierPath:stringPath];
>    [path appendBezierPath:uppath];
> }
>
>    BTW, the [string bezierWithFont:theFont] is straight out of the
> "SpeedyCategories" file in the SpeedometerView sample code.  Works 
> great.
> I wish I had found this long ago.
>

>> Gordon,
>>
>> -[NSFontManager selectedFont] is used mainly for getting the font set
>> via -[NSFontManager setSelectedFont:isMultiple:] method.
>>
>> Typically, you query the user font selection via -convertFont: 
>> method.
>>
>> See the following tech doc section.
>> Font Panel: Using the Font Panel
>>
>> Aki
>>
>> On 2008/03/02, at 14:29, Gordon Apple wrote:
>>

>>>  I am using NSFontManager and NSFontPanel to (eventually) extract
>>> a glyph
>>> as a draw object.  The following code fails unless the font panel 
>>> has
>>> previously been used in a text field.
>>>
>>>  NSFontManager* fmgr = [NSFontManager sharedFontManager];
>>>  NSFont* theFont = [fmgr selectedFont];
>>>
>>>  After I select the font and size in the panel, "theFont" will
>>> always
>>> return nil.  If I first use the panel with a text view, it will work
>>> properly.  Also, a few times, I couldn't set the size in the panel's
>>> size
>>> field.  Bug report time? Or is there something else I could do to
>>> get it
>>> properly initialized?
>>>

>