[Gambas-user] Strange way of working about form dimensions

[ron]

----8<---
> 
> The desktop resolution isn't the only problem. I'm practically going
> mad here trying to make an app that works in at least the 3 main
> resolutions (640x480, 800x600 and 1024x768). First I tried fitting the
> window to the desktop, but that caused untold resizing problems,
> specially with fonts and buttons. Then i decided to work with a fixed
> 640x480 size window (size set in startup code, to avoid the same
> problem as Leonardo), centered in the display at larger resolutions.
> When the resolution is 640x480, I remove the window borders in code.
> This seemed to be working more or less, though I did have to implement
> scrollbars in the TexLlabels, as the font doesn't fit at the 2 lower
> resolutions. Now I just found out that if I use an external monitor
> instead of the notebook's LCD (both set at the same resolution, mind
> you), fonts and buttons look much larger in the monitor and now a lot
> of stuff doesn't fit in the window anymore! I'm guessing it's
> something to do with the dpi setting that probably differs between LCD
> and monitor, but I don't understand why, as both are set to 1024x768
> and even the horizontal size is very similar.
> 
> Regards,
> Joe1962
> 

I feel your madness here in Holland :) What about me?

I'm making a project that should work on a monitor 90' turned, AKA portrait.
Resolution landscape 1280x1024 but portrait 1024x1280

In the upper 1024x768 the project window and the lower part
1024x512 some lookup information for the user. :) (me?)

I found in source code MAIN_SCALE=fm.height()/2 and initial a MAIN_SCALE=8
fm is here the font_metrics and asumed as 8x16 ?
I must/want use a 8x12 font.

During MoveScaled X, Y, W and H are multiplied by same MAIN_SCALE.

I believe MAIN_SCALE should be "(fm.width()/fm.height()) x fm.width()" 
in the first place. But should it not be more correct to use 
"(screen.width()/screen.height()) x screen.width()" as that is the intension ?
The character dimensions are in no way related to the screen dimensions for
width/height values.

The idea behind it is not bad but it works out not always to be a wanted side effect. 
Now I understand the form size problems between the to machines/monitor I'm using.

Could it not be made a option for the project in gb.Application or gb.qt.Desktop
to use xxxScaled or not ?

When I use MyForm.Height = MyForm.Width * DeskTop.Scale there is now something
wrong with the height :(

I thought [object].Width * DeskTop.Scale = [object].Height


My 2 x DeskTop.Scale Cents

Ron



PS
For Joe1962:
As I asume the Fontmetrics are used as reference I asume a 8x16 font is
used as default metrics.

You can try in gb.qt/src/main.cpp at line 117:
int MAIN_in_wait = 0;
int MAIN_loop_level = 0;
int MAIN_scale = 8; //<---- Change this to MAIN_scale = 16; (the height)

static bool in_event_loop = false;


and at line 366:

void MAIN_update_scale(void)
{
	QFontMetrics fm(QApplication::font());
  MAIN_scale = fm.height() / 2; // <--- change this to fm.height() / 1;
}

This should effective disable the xxxScale but I have not tested this.
Do not forget the "make; make install"

Ron