Re: How to handle high DPI with FOX

On 2024-12-09 14:30, Sander Jansen wrote:
> Some ideas I had years ago:
> https://github.com/gogglesmm/gogglesmm/commit/d65e42cd37f20e915de5309aba13adbbd093e29e
> 
> On Mon, Dec 9, 2024 at 2:25 PM Sander Jansen <[email protected]> 
> wrote:
> 
>> There's nothing in the core library for high DPI. However you should 
>> be
>> able to come up with something that can make it more bearable for your
>> users.
>> First some sort of check (or user setting) whether high dpi is enabled 
>> and
>> determine some scale factor (1x, 2x, 3x, everything is pixel based so 
>> no
>> fractions) and then apply the scale factor to the spacing and padding
>> parameters for the widgets and layout managers (and subclass where 
>> needed).
>> This would not solve the issues of widget drawing (single lines 
>> needing to
>> be doubled etc), but you could subclass and come up with your own 
>> drawing
>> code of course.
>> 
>> On Mon, Dec 9, 2024 at 2:02 PM Roland Plüss via Foxgui-users <
>> [email protected]> wrote:
>> 
>>> On my lapto I have now a high resolution of 3840x2160. To see text 
>>> good
>>> enough I've set the DPI scaling of Windows to 250%. FOX does render 
>>> with
>>> the proper font size but all icons, graphics and sizes are still 250%
>>> too small causing layouts to break and the entire UI to become 
>>> unusable.
>>> 
>>> Does FOX have high DPI support and if yes how can it be used?

What would be required is a 2nd set of (bigger) icons, to be used if on
high-DPI screens.

For your own code, it would be a simple matter of switching to this 
other
icon-set.

For the library itself, its a bit more tricky, as I'd have to build some
sort of mechanism in to make switch.  The hard part will be the massive
amount of art-work to be drawn...

An alternative approach would be to declare the built-in icons "fallback 
icons"
and pluck the high-rez icons from external files, via FXIconCache, 
FXIconSource,



   -- JVZ



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