How to center dlangui Window on screen

[greatsam4sure]

On Thursday, 29 November 2018 at 05:54:37 UTC, bauss wrote:
> On Wednesday, 28 November 2018 at 23:07:50 UTC, greatsam4sure 
> wrote:
>> On Wednesday, 28 November 2018 at 17:23:21 UTC, Edgar Huckert 
>> wrote:
>>> On Wednesday, 28 November 2018 at 08:55:11 UTC, greatsam4sure 
>>> wrote:
>>>> [...]
>>>
>>> For a little bit of information look at: 
>>> https://github.com/buggins/dlangui/pull/372
>>>
>>> Without going into depth I have tested this under Linux/GTK 
>>> with dlangui:
>>>
>>>     WindowState state;
>>>     Rect    rect;
>>>     rect.left   = 800;
>>>     rect.top    = 10;
>>>     rect.bottom = 600;
>>>     rect.right  = 1000;
>>>     bool bRet= window.setWindowState(state,
>>>                                      false,
>>>                                      rect);
>>>
>>>     window.show();
>>>
>>> This changed the position and size of my initial window.
>>>
>>> Edgar Huckert
>>
>>
>>
>> This help a little but not what I am looking for.
>> I want to calculate the width and window of the screen so as 
>> to center my window on screen
>>
>> I also notice that a window of 350 x 550 appear bigger compare 
>> to the same Widow dimension in Havana and adobe air.
>>
>> Why is it so?
>>
>> Plz help!  Thanks in advance
>
> To center horizontal:
>
> l = left
> s = screen width
> w = window width
>
> l = (s / 2) - (w / 2)
>
> To center vertical:
>
> t = top
> s = screen height
> h = window height
>
> t = (s / 2) - (h / 2)
>
> And about the window size.
>
> It has probably to do with the type of Window you're rendering, 
> like whether it has borders or not. Borders are not calculated 
> in the width / height, so they take up extra space. Adobe 
> usually never uses the native GUI for borders etc. so the 
> border size (if there is one) is included in their width / 
> height.


Which class in dlangui is use to obtain the screen height and 
width?
A Windom of dimension 280 x 445 in dlangui is the same as a 
Windom of 350 x 550 in Javafx and adobe air.

What could be responsible for this wide difference?
A window of 350 x 550 in adobe air is the same as a window of 350 
x 550 in javafx. So why is dlangui window bigger?

Note that I  am using  w x h for my window dimension and I am on 
windows 10