Re: [Foxgui-users] unexpected behavior with FXFontSelector

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OK, I read a bit more...still confused...

In the registry key: Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\FontLink\SystemLink

There are many fonts specified with their fallbacks but is no entry for Arial.

When I look at the Fox source for FXFontSelector and FxFontDialog I don’t see anything related to Uniscribe.

In my code when I change the font, I get the font from the FXFontSelector and pass it to the function below to change the font of all of the widgets.

I don't see how I would implement Uniscribe especially for something  like FXList.

/***************************************************************************************/
void Utilities_jhs1::updateUIFont(FXWindow * w, FXFont * font)
{
	if (w != nullptr)
	{
		FXString classname;
		classname.format("%s", w->getClassName());

		if (classname == "FXList")
		{
			FXList* widget = dynamic_cast<FXList*>(w);
			if (widget)
			{
				widget->setFont(font);
				widget->recalc();
			}
		}
		else if (classname == "FXLabel")
		{
			FXLabel* widget = dynamic_cast<FXLabel*>(w);
			if (widget)
			{
				widget->setFont(font);
				widget->recalc();
			}
		}
		else if (classname == "FXTextField")
		{
			FXTextField* widget = dynamic_cast<FXTextField*>(w);
			if (widget)
			{
				widget->setFont(font);
				widget->recalc();
			}
		}
		else if (classname == "FXButton")
		{
			FXButton* widget = dynamic_cast<FXButton*>(w);
			if (widget)
			{
				widget->setFont(font);
				widget->update(); // only needed for FXButton
				widget->recalc();
			}
		}
		else if (classname == "FXToolTip")
		{
			FXToolTip* widget = dynamic_cast<FXToolTip*>(w);
			if (widget)
			{
				widget->setFont(font);
				widget->recalc();
			}
		}
		else if (classname == "FXMenuTitle")
		{
			FXMenuTitle* widget = dynamic_cast<FXMenuTitle*>(w);
			if (widget)
			{
				widget->setFont(font);
				widget->recalc();
			}
		}
		else if (classname == "FXMenuCommand")
		{
			FXMenuCommand* widget = dynamic_cast<FXMenuCommand*>(w);
			if (widget)
			{
				widget->setFont(font);
				widget->recalc();
			}
		}
		else if (classname == "FXCheckButton")
		{
			FXCheckButton* widget = dynamic_cast<FXCheckButton*>(w);
			if (widget)
			{
				widget->setFont(font);
				widget->recalc();
			}
		}
		else if (classname == "FXMenuCheck")
		{
			FXMenuCheck* widget = dynamic_cast<FXMenuCheck*>(w);
			if (widget)
			{
				widget->setFont(font);
				widget->recalc();
			}
		}
		else if (classname == "FXRadioButton")
		{
			FXRadioButton* widget = dynamic_cast<FXRadioButton*>(w);
			if (widget)
			{
				widget->setFont(font);
				widget->recalc();
			}
		}
		else if (classname == "FXMenuCascade")
		{
			FXMenuCascade* widget = dynamic_cast<FXMenuCascade*>(w);
			if (widget)
			{
				widget->setFont(font);
				widget->recalc();
			}
		}

		for (FXWindow* c = w->getFirst(); c; c = c->getNext())
		{
			if (c != nullptr)
			{
				updateUIFont(c, font);
			}
		}
	}
}
/***************************************************************************************/

-----Original Message-----
From: Roland Hughes <ro...@lo...> 
Sent: Monday, July 3, 2023 8:20 AM
To: John Selverian <joh...@ja...>
Cc: fox...@li...
Subject: Re: [Foxgui-users] unexpected behavior with FXFontSelector

Read the instructions/text at the bottom of the GitHub page. Don't actually use the thing and tweak your fallback information without fully understanding.

While Windows ships with many fonts, Arial is one of the few System fonts. That means it is used by the OS as a default for menus, message text, etc. It will be one of the few you find configured for fallback in the Registry.

Windows also has Font linking.

https://superuser.com/questions/396160/how-to-change-configure-font-fallback

https://learn.microsoft.com/en-us/globalization/input/font-technology

On 7/3/2023 7:08 AM, John Selverian wrote:
> Font substitution only happens with Ariel font not others. I thought 
> it would work for all or none. I guess I still don’t fully understand.
>
> Kind regards,
>
> js
>
>
>> On Jul 3, 2023, at 7:30 AM, Roland Hughes via Foxgui-users 
>> <fox...@li...> wrote:
>>
>> You don't understand because you didn't read the link I sent about 
>> Font Fallback.
>>
>> There is a font fallback registry in windows. Here is a bit of 
>> reading on that.
>>
>> https://github.com/Jamesits/windows-10-font-fallback-reg
>>
>> Here is the original link about font fallback.
>>
>> https://learn.microsoft.com/en-us/windows/win32/intl/using-font-fallb
>> ack
>>
>> Font fallback doesn't happen by default.
>>
>> Without looking at the code I will state FXFontSelector enables font 
>> fallback in its configuring of the font and rendering of text but 
>> your application does not.
>>
>> Windows is different front Linux here.
>>
>> https://unix.stackexchange.com/questions/254423/unicode-fallback-font
>>
>> Most everything uses fontconfig library which defaults to the 
>> configured font fallback.
>>
>> On 7/2/2023 2:37 PM, John Selverian wrote:
>>> I understand this. The "problem" is that Arial does not have a the 
>>> "subscript 2" character but it gets displayed properly in the 
>>> FXFontSelector. How does it do this? It does not display properly in 
>>> FXFontSelector for several other fonts which do not have the 
>>> "subscript 2" character...I just see the empty square character, 
>>> this is what I expect.
>>>
>>> js
>>>
>>>
>>> -----Original Message-----
>>> From: je...@fo... <je...@fo...>
>>> Sent: Friday, June 30, 2023 1:18 PM
>>> To: joh...@ja...
>>> Cc: fox...@li...
>>> Subject: Re: [Foxgui-users] unexpected behavior with FXFontSelector
>>>
>>> On 2023-06-30 08:51, John Selverian wrote:
>>>> I'm seeing something strange with FXFontSelector (Fox v1.7.50)
>>>>
>>>>
>>>>
>>>> I've added Unicode for a subscript 2 (\\u2082 <file://u2082> )
>>> to the
>>>> preview text.
>>>>
>>>>
>>>>
>>>> I select Arial and it displays fine. Back in my program the
>>> subscript
>>>> 2 shows as an empty box indicating that the character does not
>>> exist.
>>>>
>>>>
>>>> My program should be correct since it displays the subscript 2
>>> fine
>>>> with other fonts (like Segoe UI).
>>>>
>>>>
>>>>
>>>> I've also check with MS Word that the subscript 2 does not
>>> exist in
>>>> the Arial.
>>>>
>>>>
>>>>
>>>> My question is how/why does it display fine in the preview in 
>>>> FXFontSelector even though it does not exist in Arial? It even
>>> looks
>>>> like the Arial font. I see the same with other fonts not just
>>> Arial.
>>>
>>> Make sure both are using the same font and pitch.  Not all fonts 
>>> have the full unicode repertoire in them; in fact, most fonts have 
>>> only a fraction of the full repertoire of glyphs.
>>>
>>>     -- JVZ
>>>
>>>
>>>
>>> _______________________________________________
>>> Foxgui-users mailing list
>>> Fox...@li...
>>> https://lists.sourceforge.net/lists/listinfo/foxgui-users
>>
>> --
>> Roland Hughes, President
>> Logikal Solutions
>> (630)-205-1593  (cell)
>> http://www.theminimumyouneedtoknow.com
>> http://www.infiniteexposure.net
>> http://www.johnsmith-book.com
>>
>>
>>
>> _______________________________________________
>> Foxgui-users mailing list
>> Fox...@li...
>> https://lists.sourceforge.net/lists/listinfo/foxgui-users

--
Roland Hughes, President
Logikal Solutions
(630)-205-1593  (cell)
http://www.theminimumyouneedtoknow.com
http://www.infiniteexposure.net
http://www.johnsmith-book.com