B4J Question [SOLVED] Windows screen resolution

[jroriz]

When I change the resolution of my display, using windows config, all open windows (non B4J) automatically adjust their sizes according to the new resolution, except my form created in b4j. I need the form I created also changes its size proportionally to the chosen resolution.
I thought this would happen automatically, no code required.

 

[Erel]

Are you changing the resolution or the scale (DPI)? Why would the windows change their sizes when you change the resolution?

 

[jroriz]

Are you changing the resolution or the scale (DPI)? Why would the windows change their sizes when you change the resolution?

You're right.
I bought a 4k monitor, and what is happening is that when I switch to higher resolutions, windows is changing the DPI.
But all windows change their scales, except the forms created in B4J.
I'll try some compatibility modes...

 

[Erel]

Try it with Java 11. It might work better.

 

[Daestrum]

You could try

 #VirtualMachineArgs: -Dsun.java2d.dpiaware=true

in the project attributes region.

Also something else to look at, if I drag a window to my second screen, it stays roughly the same size even though one res is 1600x900, and the other is 3840x2160. The reason - windows added a % scale to the second screen (in display settings). Setting the scale back to 100% for the second screen makes the window shrink as it crosses the screen division.

 

[jroriz]

Are you changing the resolution or the scale (DPI)? Why would the windows change their sizes when you change the resolution?

You're right.
The scale was at 200% ...
I changed it to 100% and everything is right now.
Just in case, I also used the @Daestrum suggestion.
Thank you all.

 

[Intelemarketing]

I am running round in circles trying to find a simple way ti get the screen resolution (X,Y)

What is this please ?

" Just in case, I also used the @Daestrum suggestion. "

 

[mangojack]

I am running round in circles trying to find a simple way ti get the screen resolution (X,Y)

Try this ... unsure if there's another method.

Dim jo As JavaObject
jo.InitializeStatic("java.awt.Toolkit")
jo = jo.RunMethodJO("getDefaultToolkit",Null)

Dim ScreenX As Int = jo.RunMethodJO("getScreenSize",Null).RunMethod("getWidth",Null)
Dim ScreenY As Int = jo.RunMethodJO("getScreenSize",Null).RunMethod("getHeight",Null)
Log($"Screen Resolution =  ${ScreenX}  x  ${ScreenY}"$)

But ... You will get a warning... which in this thread @Erel says is OK and to ignore. If it is any different I am sure he will advise.

Please consider reporting this to the maintainers of anywheresoftware.b4j.object.JavaObject

Today I received this report, but the Application works correctly Waiting for debugger to connect... Program started. Resize Map Panel. Map not initialized Alert: loadMapLibrary mapLibraryLoaded! Alert: !!!mapLibraryLoaded!!! WARNING: An illegal reflective access operation has occurred...

www.b4x.com

** EDIT ... added some missing code.

 

[jroriz]

I am running round in circles trying to find a simple way ti get the screen resolution (X,Y)

What is this please ?

" Just in case, I also used the @Daestrum suggestion. "

You can use AWTRobot:

    Dim c As AWTRobot
    Dim a() As Int = c.ScreenGetDimensions
    
    Log("width " & a(0))
    Log("height " & a(1))

 

[Intelemarketing]

I found this, which adds an important part to solving of the problem - SCALE

    MyScale = GetDeviceLayoutValues.Scale        'divide this into height and width it seems     'This was 2 in my case
    Log ("Scale = " & MyScale)
    MyHeight = GetDeviceLayoutValues.Height   This was twice the width of the Phone   
    Log ("Height = " & MyHeight
    MyWidth = GetDeviceLayoutValues.Width     This was twice the height of the phone
    Log ("Width = " & MyWidth

SCALE gave me a variable to divide into the Height and Width to normalise the size when working with DIP

eg, prefdialog.Initialize(Activity, "Preferences Dialog", 350dip, 350dip)

Thank you for your input