Re: Gtk ada Sizes in pixels

[ldries46 <bertus.dries@planet.nl>]

Op 2-7-2020 om 16:23 schreef Dennis Lee Bieber:
> On Thu, 2 Jul 2020 07:13:15 +0200, ldries46 <bertus.dries@planet.nl>
> declaimed the following:
>
>> I have a problem with Sizes of Gtk Windows.
>> On a screen of 3840 * 2160 pixels I want a Main window of about 2000 *
>> 1200 pixels. When I run the program where the initiation code  is herby
>> given (as far a sizes are involved) it looks like a window of about 3000
>> * 2000 pixels what should I do to get real pixels
>>
> 	Isn't this essentially the same question you asked on June 23 in
>
> Message-ID: <5ef1a1cc$0$1475$e4fe514c@news.kpn.nl>
>
> !> I am using a high definition screen 4K (3840 * 2160 pixels) and two
> !> computers one with a graphic card which can handle this resolution and
> !> an older one which can handle up to 1920 * 1080. (the first on Windows
> !> 10 the second on Linux Ubuntu). I want both computers capable of running
> !> my programs even if I define a the window on 2000 * 1200 for a Gtk
> !> project. On the computer that can handle the resolution the there is of
> !> course no problem. On the other the screen is window is to big for the
> !> resolution and is shown only partly (of course).
>
> 	If not, they are very closely related... and probably not Ada specific
> (how does a C/C++ GTK experiment behave?)
>
> https://lazka.github.io/pgi-docs/Gdk-3.0/classes/WindowAttr.html
> https://lazka.github.io/pgi-docs/Gdk-3.0/classes/Geometry.html
> """
> The other useful fields are the min_aspect and max_aspect fields; these
> contain a width/height ratio as a floating point number. If a geometry
> widget is set, the aspect applies to the geometry widget rather than the
> entire window. The most common use of these hints is probably to set
> min_aspect and max_aspect to the same value, thus forcing the window to
> keep a constant aspect ratio.
> """
>
> 	In a quick Google -- I don't seem to find aspect exposed
> http://docs.adacore.com/live/wave/gtkada/html/gtkada_rm/index.html
> other than in Gtk.Aspect_Frame
>
>
No it is not the same question but it is in line. In the mean time from  
answers then I found first GtkWindow. Get_Size which did not gave a 
correct answer at the moment I needed it. But from there I found 
Gdk.Windows and Gdk.Screen where all interesting  functions were 
depreciated from version  and I was directed to a GdkMonitor which was 
not present in the highest version of GtkAda I could find. From that 
moment I decided to put the values in the environment variables, the 
least nice solution. It was then that I realised that the window of my 
program did not have the correct format ca about 1.5 times as big as 
expected. So this question is another than earlier but it is an 
offspring of that other question

I will investigate further