GUI/Maximum window dimensions

GUI/Maximum window dimensions
You are encouraged to solve this task according to the task description, using any language you may know.

The task is to determine the maximum height and width of a window that can fit within the physical display area of the screen without scrolling.

This is effectively the screen size (not the total desktop area, which could be bigger than the screen display area) in pixels minus any adjustments for window decorations and menubars.

The idea is to determine the physical display parameters for the maximum height and width of the usable display area in pixels (without scrolling).

The values calculated should represent the usable desktop area of a window maximized to fit the the screen.

Considerations

--- Multiple Monitors

For multiple monitors, the values calculated should represent the size of the usable display area on the monitor which is related to the task (i.e.:   the monitor which would display a window if such instructions were given).

--- Tiling Window Managers

For a tiling window manager, the values calculated should represent the maximum height and width of the display area of the maximum size a window can be created (without scrolling). This would typically be a full screen window (minus any areas occupied by desktop bars), unless the window manager has restrictions that prevents the creation of a full screen window, in which case the values represent the usable area of the desktop that occupies the maximum permissible window size (without scrolling).

Ada

Library: GTK

Library: GtkAda

with Gtk.Main;
with Glib;
with Gtk.Window;  use Gtk.Window;
with Gtk.Enums;   use Gtk.Enums;
with Ada.Text_IO; use Ada.Text_IO;

procedure Max_Size is

   Win          : Gtk_Window;
   Win_W, Win_H : Glib.Gint;
   package Int_Io is new Integer_IO (Glib.Gint);
   Hid : Gtk.Main.Quit_Handler_Id;

begin
   Gtk.Main.Init;
   Gtk_New (Win);
   Initialize (Win, Window_Toplevel);
   Maximize (Win);
   Show (Win);
   Get_Size (Win, Win_W, Win_H);
   Put ("Maximum dimensions of window : W ");
   Int_Io.Put (Win_W, Width => 4);
   Put (" x H ");
   Int_Io.Put (Win_H, Width => 4);
   New_Line;
   Hid := Gtk.Main.Quit_Add_Destroy (0, Win);
end Max_Size;

Output (on a 1280 x 800 screen with Windows XP):

Maximum dimensions of window : W 1280 x H  734

AutoHotkey

This is a modified example taken from the AutoHotkey documentation for the SysGet command. Also, the built in variables A_ScreenHeight and A_ScreenWidth contain the width and height of the primary monitor, in pixels.

SysGet, MonitorCount, MonitorCount
SysGet, MonitorPrimary, MonitorPrimary
MsgBox, Monitor Count:`t%MonitorCount%`nPrimary Monitor:`t%MonitorPrimary%
Loop, %MonitorCount%
{
    SysGet, MonitorName, MonitorName, %A_Index%
    SysGet, Monitor, Monitor, %A_Index%
    SysGet, MonitorWorkArea, MonitorWorkArea, %A_Index%
    MsgBox, % "Monitor:`t#" A_Index 
            . "`nName:`t" MonitorName
            . "`nLeft:`t" MonitorLeft "(" MonitorWorkAreaLeft " work)"
            . "`nTop:`t" MonitorTop " (" MonitorWorkAreaTop " work)"
            . "`nRight:`t" MonitorRight " (" MonitorWorkAreaRight " work)"
            . "`nBottom:`t" MonitorBottom " (" MonitorWorkAreaBottom " work)"
}

Output:

Monitor Count:    1
Primary Monitor:  1

Monitor:    #1
Name:       \\.\DISPLAY1
Left:       0(0 work)
Top:        0 (0 work)
Right:      1920 (1920 work)
Bottom:     1080 (1040 work)

Axe

Because Axe is currently (6/22/2015) only available on the TI-83/84 black and white calculators, the screen dimensions are fixed at 96 by 64 pixels.

BASIC

BaCon

Requires BaCon version 4.0.1 or higher, using GTK3.

OPTION GUI TRUE
PRAGMA GUI gtk3

FUNCTION Define_Window

    LOCAL (*max)() = gtk_window_maximize TYPE void
    LOCAL id

    id = GUIDEFINE("{ type=WINDOW name=window }")
    CALL GUIFN(id, "window", max)
    RETURN id

ENDFUNCTION

SUB Print_Dimensions

    LOCAL (*size)() = gtk_window_get_size TYPE void
    LOCAL x, y

    CALL GUIFN(gui, "window", size, &x, &y)
    PRINT x, "-", y
    END

ENDSUB

gui = Define_Window()
ALARM Print_Dimensions, 500
event$ = GUIEVENT$(gui)

Output:

Result when executed using my 1600x900 screen:

1600-838

BBC BASIC

Works with: BBC BASIC for Windows

      SPI_GETWORKAREA = 48
      DIM rc{l%,t%,r%,b%}
      SYS "SystemParametersInfo", SPI_GETWORKAREA, 0, rc{}, 0
      PRINT "Maximum width = " ; rc.r% - rc.l%
      PRINT "Maximum height = " ; rc.b% - rc.t%

Output:

Maximum width = 1367
Maximum height = 1021

C

Windows

The following implementation has been tested on Windows 8.1, may not work on Linux systems.

#include<windows.h>
#include<stdio.h>

int main()
{
	printf("Dimensions of the screen are (w x h) : %d x %d pixels",GetSystemMetrics(SM_CXSCREEN),GetSystemMetrics(SM_CYSCREEN));
	return 0;
}

Output :

Dimensions of the screen are (w x h) : 1536 x 864 pixels

C#

Translation of: Visual Basic .NET

Compiler: Roslyn C# (language version >= 6)

Works with: .NET Framework version 4.7.2

(simple enough that it should probably work on every Framework version--.NET Core 3.0 will support Windows Forms on Windows only)

Must be referenced:

Library: GDI+

(managed interface) [System.Drawing]

Library: Windows Forms

[System.Windows.Forms]

Bounds are the screen's dimensions; working area is the is the region that excludes "taskbars, docked windows, and docked tool bars" (from Framework documentation).

using System;
using System.Drawing;
using System.Windows.Forms;

static class Program
{
    static void Main()
    {
        Rectangle bounds = Screen.PrimaryScreen.Bounds;
        Console.WriteLine($"Primary screen bounds:  {bounds.Width}x{bounds.Height}");

        Rectangle workingArea = Screen.PrimaryScreen.WorkingArea;
        Console.WriteLine($"Primary screen working area:  {workingArea.Width}x{workingArea.Height}");
    }
}

Output:

Primary screen bounds:  1714x1143
Primary screen working area:  1714x1103

Alternatively, use the dimensions of a borderless form with WindowState set to FormWindowState.Maximized (i.e. a full-screen window that is shown above the taskbar).

using System;
using System.Drawing;
using System.Windows.Forms;

static class Program
{
    static void Main()
    {
        using (var f = new Form() { FormBorderStyle = FormBorderStyle.None, WindowState = FormWindowState.Maximized })
        {
            f.Show();
            Console.WriteLine($"Size of maximized borderless form:  {f.Width}x{f.Height}");
        }
    }
}

Output:

Size of maximized borderless form:  1714x1143

Creative Basic

DEF Win:WINDOW
DEF Close:CHAR

DEF ScreenSizeX,ScreenSizeY:INT
DEF L,T,ClientWidth,ClientHeight:INT

GETSCREENSIZE(ScreenSizeX,ScreenSizeY)

WINDOW Win,0,0,ScreenSizeX,ScreenSizeY,@MINBOX|@MAXBOX|@SIZE|@MAXIMIZED,0,"Get Client Size",MainHandler

'Left and top are always zero for this function.
GETCLIENTSIZE(Win,L,T,ClientWidth,ClientHeight)

PRINT Win,"Maximum drawing area values: width is"+STR$(ClientWidth)+" and height is"+STR$(ClientHeight)+"."

WAITUNTIL Close=1

CLOSEWINDOW Win

END

SUB MainHandler

	SELECT @CLASS

	CASE @IDCLOSEWINDOW

	Close=1

	ENDSELECT

RETURN

Output: Maximum drawing area values: width is 1280 and height is 749.

Delphi

Library: Winapi.Windows

Library: System.SysUtils

Library: Vcl.Forms

unit Main;

interface

uses
  Winapi.Windows, System.SysUtils, Vcl.Forms;

type
  TForm1 = class(TForm)
    procedure FormCreate(Sender: TObject);
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
var
 w,h:Integer;
begin
  w := Screen.Monitors[0].WorkareaRect.Width;
  h := Screen.Monitors[0].WorkareaRect.Height;
  Caption:= format('%d x %d',[w,h]);
  SetBounds(0,0,w,h);
end;

end.

Resources from form:

object Form1: TForm1
  OnCreate = FormCreate
end

EGL

To get the size of the window in a RuiHandler a JavaScript function is needed that is not natively supported by EGL. Therefore an external type is created to wrap the JavaScript function.

File 'Browser.js' in folder 'utils' in the WebContent folder of a rich UI project.

egl.defineClass(
	'utils', 'Browser',
{
	"getViewportWidth" : function () {
		return window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth;
	},
	"getViewportHeight" : function(){
		return window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight;
	}
});

The external type to wrap the JavaScript functions.

ExternalType Browser type JavaScriptObject{
	relativePath = "utils",
	javaScriptName = "Browser"
}

	function getViewportWidth() returns (int);
	
	function getViewportHeight() returns (int);
	
end

Usage of the Browser external type in a RuiHandler.

browser Browser{};
bvh int = browser.getViewportHeight();
bvw int = browser.getViewportWidth();
SysLib.writeStdout("ViewportHeight: " + bvh);
SysLib.writeStdout("ViewportWidth: " + bvw);

Output

ViewportHeight: 860
ViewportWidth: 1680

FBSL

In the graphics mode, Windows does it all automatically and displays a form that fills the entire area not obscured by the taskbar on your primary monitor:

#INCLUDE <Include\Windows.inc>
ShowWindow(ME, SW_MAXIMIZE)
BEGIN EVENTS
END EVENTS

Alternatively, one can obtain the unobscured area's dimensions using the following console script:

#APPTYPE CONSOLE
#INCLUDE <Include\Windows.inc>

TYPE RECT
	%Left
	%Top
	%Right
	%Bottom
END TYPE

DIM rc AS RECT
SystemParametersInfo(SPI_GETWORKAREA, 0, @rc, 0)
PRINT "width = ", rc.Right - rc.Left, ", height = ", rc.Bottom - rc.Top

PAUSE

A typical output for a 1680x1050 primary monitor will be:

width = 1680, height = 1017

Press any key to continue...

FreeBASIC

' FB 1.05.0 Win64

' Using SystemParametersInfo function in Win32 API
Dim As Any Ptr library = DyLibLoad("user32")
Dim Shared SystemParametersInfo As Function (ByVal As ULong, ByVal As ULong, ByVal As Any Ptr, ByVal As ULong) As Long
SystemParametersInfo = DyLibSymbol(library, "SystemParametersInfoA")

Type Rect
  As Long left, top, right, bottom
End Type

#Define SPI_GETWORKAREA &H30
Dim r As Rect
SystemParametersInfo(SPI_GETWORKAREA, 0, @r, 0)
DyLibFree(library)
Print "Maximum usable desktop area :  W" ; r.right - r.left; " x H"; r.bottom - r.top; " pixels"
Print
Print "Press any key to quit"
Sleep

Output for my machine:

Output:

Maximum usable desktop area :  W 1366 x H 728 pixels

FutureBasic

include "NSLog.incl"

CGRect r
r = fn ScreenVisibleFrame( fn ScreenMainScreen )
NSLog(@"x:%.0f, y:%.0f, w:%.0f, h:%.0f",r.origin.x,r.origin.y,r.size.width,r.size.height)

HandleEvents

Output:

x:0, y:50, w:1728, h:1029

Gambas

Overview

In gambas, the trick to determining the maximum window size that will fit on the screen is to create a form that is maximized and then query its dimensions from within a Form_Resize() event. Note that the form can be invisible during this process, and typically we would use the main modal window (FMain in this example).

Creating the form

From with the project create a form (FMain) with the following properties set:

FMain.Maximized = True
FMain.Visible = False    ' The form can be invisible

From within the projectview, rightclick the FMain form and select Edit class from the contextmenu. This will display a form class file (FMain.class) as follows:

PUBLIC SUB _new()

END

PUBLIC SUB Form_Open()

END

Adding the form resize event

We can now add a Form_Resize() event to the class file with the necessary code to obtain the screen dimensions as follows:

PUBLIC SUB Form_Resize()
  PRINT "The maximum window size that can be used without scrolling is "; FMain.Width; " x "; FMain.Height  
END

Gambas

Public Sub Form_Open()

Print Desktop.Width
Print Desktop.Height

End

Output:

1920
1055

Go

Library: RobotGo

package main

import (
    "fmt"
    "github.com/go-vgo/robotgo"
)

func main() {
    w, h := robotgo.GetScreenSize()
    fmt.Printf("Screen size: %d x %d\n", w, h)
    fpid, err := robotgo.FindIds("firefox")
    if err == nil && len(fpid) > 0 {
        pid := fpid[0]
        robotgo.ActivePID(pid)
        robotgo.MaxWindow(pid)
        _, _, w, h = robotgo.GetBounds(pid)
        fmt.Printf("Max usable : %d x %d\n", w, h)
    }
}

On my machine the figures are:

Screen size: 1366 x 768
Max usable : 1301 x 744

Groovy

def window = java.awt.GraphicsEnvironment.localGraphicsEnvironment.maximumWindowBounds

println "width: $window.width, height: $window.height"

Haskell

import Graphics.UI.Gtk
import Control.Monad (when)
import Control.Monad.Trans (liftIO)

maximumWindowDimensions :: IO ()
maximumWindowDimensions = do
    -- initialize the internal state of the GTK toolkit
    initGUI
    -- create a window
    window <- windowNew
    -- quit the application when the window is closed
    on window objectDestroy mainQuit
    -- query the size of the window when its dimensions change
    on window configureEvent printSize
    -- get the screen the window will be drawn upon
    screen <- windowGetScreen window
    -- get the size of the screen
    x <- screenGetWidth screen
    y <- screenGetHeight screen
    -- print the dimensions of the screen
    putStrLn ("The screen is " ++ show x ++ " pixels wide and " ++
        show y ++ " pixels tall for an undecorated fullscreen window.")
    -- maximize the window and show it. printSize will then be called
    windowMaximize window
    widgetShowAll window
    -- run the main GTK loop.
    -- close the window manually.
    mainGUI

-- On my Xfce4 desktop, the configure_event is called three times when a
-- top level window is maximized. The first time, the window size
-- returned is the size prior to maximizing, and the last two times
-- it is the size after maximizing.
-- If the window is (un)maximized manually, the size returned is always
-- the size of the unmaximized window.
-- That means: either GTK or Xfce4 does not handle window maximization
-- correctly, or the GTK bindings for Haskell are buggy, or there is an
-- error in this program.

printSize :: EventM EConfigure Bool
printSize = do
    -- get the window that has been resized
    w <- eventWindow
    -- is the window maximized?
    s <- liftIO $ drawWindowGetState w
    when (WindowStateMaximized `elem` s) $ do
        -- get the size of the window that has been resized
        (x, y) <- eventSize
        -- print the dimensions out
        liftIO $ putStrLn ("The inner window region is now " ++ show x ++
            " pixels wide and " ++ show y ++ " pixels tall.")
    return True

Icon and Unicon

Raise and query a hidden window.

link graphics

procedure main()  # Window size

W  := WOpen("canvas=hidden")
dh := WAttrib("displayheight")
dw := WAttrib("displaywidth")
WClose(W)

write("The display size is w=",dw,", h=",dh)
end

This example is in need of improvement: Need to handle window borders which will vary from system to system and handle or comment on additional requirements.

IWBASIC

DEF Win:WINDOW
DEF Close:CHAR

DEF ScreenSizeX,ScreenSizeY:UINT
DEF L,T,ClientWidth,ClientHeight:INT

GETSCREENSIZE(ScreenSizeX,ScreenSizeY)

OPENWINDOW Win,0,0,ScreenSizeX,ScreenSizeY,@MAXBOX|@MINBOX|@SIZE|@MAXIMIZED,NULL,"Get client area",&MainHandler

'Left and top are always zero for this function.
GETCLIENTSIZE (Win,L,T,ClientWidth,ClientHeight)

PRINT Win,"Maximum drawing area values: width is"+STR$(ClientWidth)+" and height is"+STR$(ClientHeight)+"."

WAITUNTIL Close=1

CLOSEWINDOW WIN

END

SUB MainHandler

	SELECT @MESSAGE

	CASE @IDCLOSEWINDOW

	Close=1

	ENDSELECT

RETURN
ENDSUB

Output: Maximum drawing area values: width is 1280 and height is 749.

J

For this task, we can create a temporary window, and subtract its usable area from its size. This gives us the size (in pixels) used for decorations. Then we can query the screen size and subtract the size of those decorations.

For example:

   (".wd 'qscreen') -&(2 3&{) (wd'pclose') ]-/".'qform',:&wd 'pc a; cc g isidraw; pshow; qchildxywh g'
1348 750

Here, we had a screen with 1366 by 768 pixels (width and height), and space for decorations subtract 18 from each of those dimensions.

Java

import java.awt.*;
import javax.swing.JFrame;

public class Test extends JFrame {

    public static void main(String[] args) {
        new Test();
    }

    Test() {
        Toolkit toolkit = Toolkit.getDefaultToolkit();

        Dimension screenSize = toolkit.getScreenSize();
        System.out.println("Physical screen size: " + screenSize);

        Insets insets = toolkit.getScreenInsets(getGraphicsConfiguration());
        System.out.println("Insets: " + insets);

        screenSize.width -= (insets.left + insets.right);
        screenSize.height -= (insets.top + insets.bottom);
        System.out.println("Max available: " + screenSize);
    }
}

Output:

Physical screen size: java.awt.Dimension[width=1920,height=1080]
Insets: java.awt.Insets[top=0,left=0,bottom=30,right=0]
Max available: java.awt.Dimension[width=1920,height=1050]

Julia

Uses the Gtk library.

win = GtkWindow("hello", 100, 100)
fullscreen(win)
sleep(10)
println(width(win), " ", height(win))
destroy(win)

Output:

1920 1080

Kotlin

Translation of: Java

// version 1.1

import java.awt.Toolkit
import javax.swing.JFrame

class Test : JFrame() {
    init {
        val r = Regex("""\[.*\]""")
        val toolkit = Toolkit.getDefaultToolkit()
        val screenSize = toolkit.screenSize
        println("Physical screen size : ${formatOutput(screenSize, r)}")
        val insets = toolkit.getScreenInsets(graphicsConfiguration)
        println("Insets               : ${formatOutput(insets, r)}")
        screenSize.width  -= (insets.left + insets.right)
        screenSize.height -= (insets.top + insets.bottom)
        println("Max available        : ${formatOutput(screenSize, r)}")
    }

    private fun formatOutput(output: Any, r: Regex) = r.find(output.toString())!!.value.replace(",", ", ")
}

fun main(args: Array<String>) {
    Test()
}

Sample output:

Output:

Physical screen size : [width=1366, height=768]
Insets               : [top=0, left=0, bottom=40, right=0]
Max available        : [width=1366, height=728]

Lingo

put _system.desktopRectList
-- [rect(0, 0, 1360, 768), rect(1360, 0, 2960, 1024)]

Lua

nw = require("nw")
win = nw:app():window(320, 240)
win:show()
win:maximize()
cw, ch = win:client_size()
print(cw .. " x " .. ch)

On a 1920 x 1080 screen..

Output:

1920 x 1017

M2000 Interpreter

Move console to all monitors, at full screen (at each monitor). Then open a form and resize it to fill all monitors, the move the form to monitor with bigger area and expand form to fill that monitor. At the end close the window. All actions performed with once running threads, using After milliseconds { }

Unit for screen is twip (not pixel)

We can read twipsX and twipsY as twips per pixel in X and Y direction

Module CheckAllMonitors {
      mode  16 ' font size
      i=-1
      Flush
      Do {
            i++
            Window mode, i
            Print Window=i
            Wait 100
            Form ;   ' expand Background to fill monitor (form without arguments cut that frame)
            if window=i Then {
                  Background {
                        Cls 0, 0
                        data i,  scale.x, scale.y, motion.x, motion.y
                  }
            } else exit
      }  Always
      Dim Scrx(i), ScrY(i), ScrLeft(i), ScrTop(i)
      While Not Empty {
            Read i
            Read Scrx(i), ScrY(i), ScrLeft(i), ScrTop(i)
      }
      \\ check if we have same left top point
      For i=0 to Len(Scrx())-1 {
            Print "Monitor:", i, "left top (";ScrLeft(i);",";ScrTop(i);") size: (";Scrx(i);",";ScrY(i);")"
      }
      
      A=ScrLeft(0)
      B=ScrTop(0)
      LeftMargin=A
      TopMargin=B
      RightMargin=Scrx(0)+A
      BottomMargin=Scry(0)+B
      MaxArea=Scrx(0)*Scry(0)
      ChooseMonitor=0
      Out=True
      If Len(Scrx())>1 then {
            For i=1 to Len(Scrx())-1 {
                   LeftMargin=Min.Data(A, ScrLeft(i))
                   TopMargin=Min.Data(B, ScrTop(i))
                   RightMargin=Max.Data(RightMargin, Scrx(i)+Scrleft(i))
                   BottomMargin=Max.Data(BottomMargin, Scry(i)+ScrTop(i))
                   Out=Out and (A=ScrLeft(i) and  B=ScrTop(i))
                   if MaxArea<Scrx(i)*Scry(i) then MaxArea=Scrx(i)*Scry(i) : ChooseMonitor=i
            }
      }
      If Len(Scrx())=1 then {
            Print "One Monitor"
      } else  Print If$(Out ->"Clone Monitors", "Multiple Monitors ")
      Print "Left Top Corner:", LeftMargin, TopMargin
      Print "Width, Height", RightMargin-LeftMargin, BottomMargin-TopMargin
      Declare Form1 Form
      \\ After 100ms Form1 expand to all monitors
      After 100  { 
            Method Form1,"Move", LeftMargin, TopMargin, RightMargin-LeftMargin, BottomMargin-TopMargin
      }
      \\ After 2000-100ms Form1 move to montior ChooseMonitor,  and has same width and height
      After 2000 {
                  Try {
                        Method Form1,"Move", ScrLeft(ChooseMonitor),ScrTop(ChooseMonitor), Scrx(ChooseMonitor), Scry(ChooseMonitor) 
                  }
      }
      \\ after 4000 ms from other threads, form1 close
      After 4000 {
                  Try {
                        Method Form1, "CloseNow"
                  }
      }
      Method Form1, "Show", 1
      Declare Form1 Nothing
      Threads Erase
}
CheckAllMonitors

Mathematica / Wolfram Language

Example output on a 1280x1024 system.

Differences@Transpose@SystemInformation["Devices"][[1, 2, 1, 1, 2]]
->{{1260, 951}}

Nim

With Gtk2

Library: Gtk2

Getting the screen size, ignoring borders, is as easy as:

import
  gtk2, gdk2

nim_init()
var w = gdk2.screen_width()
var h = gdk2.screen_height()
echo("WxH=",w,"x",h)

Output:

WxH=1920x1080

But getting the real size excluding borders is more difficult, at least with Gtk. We need to draw a window at maximum size and wait enough time before asking for its size. The following program does the job:

import glib2, gtk2

proc printSize(window: PWindow): guint {.cdecl.} =
  var width, height: gint
  window.get_size(addr(width), addr(height))
  echo "W x H = ", width, " x ", height
  main_quit()

nim_init()

let window = window_new(WINDOW_TOPLEVEL)
window.maximize()
window.show_all()

discard g_timeout_add(100, printSize, addr(window[]))

main()

Output:

W x H = 1920 x 1031

With Gtk3 (gintro)

Library: gintro

This is the translation of Gtk2 program to Gtk3 using “gintro” bindings.

import gintro/[glib, gobject, gtk, gio]

var window: ApplicationWindow

#---------------------------------------------------------------------------------------------------

proc printSize(data: pointer): gboolean {.cdecl.} =
  var width, height: int
  window.getSize(width, height)
  echo "W x H = ", width, " x ", height
  window.destroy()

#---------------------------------------------------------------------------------------------------

proc activate(app: Application) =
  ## Activate the application.

  window = app.newApplicationWindow()
  window.maximize()
  window.showAll()

  discard timeoutAdd(PRIORITY_DEFAULT, 100, SourceFunc(printSize), nil, nil)

#———————————————————————————————————————————————————————————————————————————————————————————————————

let app = newApplication(Application, "Rosetta.ScreenSize")
discard app.connect("activate", activate)
discard app.run()

Output:

W x H = 1920 x 1031

With IUP

Library: IUP

import
  iup

# assumes you have the iup  .dll or .so installed

discard iup.open(nil,nil)

var scrnFullSize = GetGlobal("FULLSIZE")
var scrnSize = GetGlobal("SCREENSIZE")
var scrnMInfo = GetGlobal("MONITORSINFO")
var scrnVScreen = GetGlobal("VIRTUALSCREEN")

var dlg = Dialog(nil)
SetAttribute(dlg, "SIZE", "FULL")
var scrnXSize = GetAttribute(dlg,"MAXSIZE")

echo scrnFullSize, "\n", scrnSize, "\n", scrnMInfo, "\n", scrnVScreen, "\n", scrnXSize

discard iup.Alarm("Screen client size", scrnFullSize ,"Ok",nil, nil)

#discard iup.mainloop()
iup.close()

Output:

1280x800
1280x800
0 0 1280 800

0 0 1280 800
65535x65535

PARI/GP

plothsizes()[1..2]

Perl

Library: Perl/Tk

use strict;
use warnings;
use Tk;

sub get_size {
	my $mw = MainWindow->new();
	return ($mw->maxsize);
}

get_size returns (1425,870) here.

Phix

Translation of: Nim

Library: Phix/pGUI

include pGUI.e
 
IupOpen()
 
string scrnFullSize = IupGetGlobal("FULLSIZE")
string scrnSize = IupGetGlobal("SCREENSIZE")
string scrnMInfo = IupGetGlobal("MONITORSINFO")
string scrnVScreen = IupGetGlobal("VIRTUALSCREEN")
 
Ihandle dlg = IupDialog(NULL,"SIZE=FULL")
string scrnXSize = IupGetAttribute(dlg,"MAXSIZE")
 
?{scrnFullSize, scrnSize, scrnMInfo, scrnVScreen, scrnXSize}
 
IupClose()

Output:

{"1920x1080","1920x1080","0 0 1920 1080\n","0 0 1920 1080","65535x65535"}

You could instead use atom {x,y} = IupGetIntInt(NULL,"FULLSIZE"|"SCREENSIZE"|"MAXSIZE") to get numbers instead of strings.

PicoLisp

The following works on ErsatzLisp, the Java version of PicoLisp.

(let Frame (java "javax.swing.JFrame" T "Window")
   (java Frame 'setExtendedState
      (java (public "javax.swing.JFrame" 'MAXIMIZED_BOTH)) )
   (java Frame 'setVisible T)
   (wait 200)
   (let Size (java (java Frame 'getContentPane) 'getSize)
      (prinl "Width: " (java (public Size 'width)))
      (prinl "Height: " (java (public Size 'height))) )
   (java Frame 'dispose) )

Output (on a 1024x768 screen):

Width: 1010
Height: 735

Processing

fullScreen() is the recommended approach to draw a window covering the entire screen from Processing 3.0+ onwards. The implementation below first creates a window and then prints the dimensions onto the canvas.

//Aamrun, 26th June 2022

fullScreen();
fill(0);
textSize(50);
text("Screen Height : " + str(height), 100, 100);
text("Screen Width : " + str(width), 100, 200);

PureBasic

If OpenWindow(0, 0, 0, 5, 5, "", #PB_Window_Maximize + #PB_Window_Invisible)
  maxX = WindowWidth(0)
  maxY = WindowHeight(0)
  CloseWindow(0)
  MessageRequester("Result", "Maximum Window Width: " + Str(maxX) + ", Maximum Window Height: " + Str(maxY))
EndIf

Sample output for a screen area 1600 x 1200:

Maximum Window Width: 1600, Maximum Window Height: 1181

Python

#!/usr/bin/env python3

import tkinter as tk # import the module.

root = tk.Tk() # Create an instance of the class.
root.state('zoomed') # Maximized the window.
root.update_idletasks() # Update the display.
tk.Label(root, text=(str(root.winfo_width())+ " x " +str(root.winfo_height())),
         font=("Helvetica", 25)).pack() # add a label and set the size to text.
root.mainloop()

Sample output for 1366 x 768 screen:

1366 x 706

Racket

#lang racket/gui
(define-values [W H]
  (let ([f (new frame% [label "test"])])
    (begin0 (send* f (maximize #t) (show #t) (get-client-size))
      (send f show #f))))
(printf "~ax~a\n" W H)

Raku

(formerly Perl 6)

Works with: Rakudo version 2018.12

This is kind-of a silly task. The maximum window size is going to depend on your OS, hardware, display server and graphics toolkit, not your programming language. Taken at face value, using a Linux system running an X11 display server, the maximum displayable window size is the resolution of your monitor. Basically, the size of your desktop viewport. The Raku module X11::libxdo returns the desktop viewport size for get-desktop-dimensions which is the effective maximum window size.

use X11::libxdo;

my $xdo = Xdo.new;

my ($dw, $dh) = $xdo.get-desktop-dimensions( 0 );

say "Desktop viewport dimensions: (maximum-fullscreen size) $dw x $dh";

On my system returns:

Desktop viewport dimensions: (maximum-fullscreen size) 1920 x 1080

REXX

Most REXX interpreters essentially run "inside" a DOS window,   and any attempts to find the (maximum) size of that
window is limited to that (current) window, not the maximum.

Furthermore, the maximum size would depend on the   smallest   font supported by that window, which is dependent
upon which code page is being used   (and what font sizes it supports).   On this author's system,   it's a (fixed) font
size of   5   (which is barely readable,   but it's useful for   X,Y   plotting or for cut─n─paste).

It should be noted that DOS doesn't support a window that extends to other monitors.

Ring

load "guilib.ring"
new qApp {
         win1 = new qWidget() {
                new qPushButton(win1) {
                    resize(200,200)
                    settext("Info")
                    setclickevent(' win1{ setwindowtitle("Width: " +  width() + " Height : " +  height() ) }')
                }
                showMaximized()}
                exec()
                }

Output:

Run BASIC

Run Basic uses javaScript to return the width of the browser window. IE browser uses different functions than everyone else. So you write code for the world, and also for IE

html "<INPUT TYPE='HIDDEN' id='winHigh' name='winHigh' VALUE='";winHigh;"'></input>"
html "<INPUT TYPE='HIDDEN' id='winWide' name='winWide' VALUE='";winWide;"'></input>"

html "<script>
<!--

function winSize()
{
var myWide	= 0, myHigh = 0;
if( typeof( window.innerWidth ) == 'number' ) {
//Non-IE
myWide		= window.innerWidth;
myHigh		= window.innerHeight;
} else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
//IE 6+ in 'standards compliant mode'
myWide		= document.documentElement.clientWidth;
myHigh		= document.documentElement.clientHeight;
} else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
//IE 4 compatible
myWide		= document.body.clientWidth;
myHigh		= document.body.clientHeight;
}
// window.alert( 'Width = ' + myWide + ' Height = ' + myHigh );
document.getElementById('winHigh').value = myHigh;
document.getElementById('winWide').value = myWide;
}

window.onresize  = function()
{
var x = winSize();
}
var x = winSize();
//--></script>
"

Scala

import java.awt.{Dimension, Insets, Toolkit}

import javax.swing.JFrame

class MaxWindowDims() extends JFrame {
  val toolkit: Toolkit = Toolkit.getDefaultToolkit
  val (insets0, screenSize) = (toolkit.getScreenInsets(getGraphicsConfiguration),  toolkit.getScreenSize)

  println("Physical screen size: " + screenSize)
  System.out.println("Insets: " + insets0)
  screenSize.width -= (insets0.left + insets0.right)
  screenSize.height -= (insets0.top + insets0.bottom)
  System.out.println("Max available: " + screenSize)
}

object MaxWindowDims {
  def main(args: Array[String]): Unit = {
    new MaxWindowDims
  }
}

Sidef

Using the Tk library:

require('Tk')

func max_window_size() -> (Number, Number) {
    %s'MainWindow'.new.maxsize;
}

var (width, height) = max_window_size();
say (width, 'x', height);

Output:

1905x1050

Tcl

Library: Tk

package require Tk
proc maxSize {} {
    # Need a dummy window; max window can be changed by scripts
    set top .__defaultMaxSize__
    if {![winfo exists $top]} {
        toplevel $top
        wm withdraw $top
    }
    # Default max size of window is value we want
    return [wm maxsize $top]
}

On this system, that returns 1440 836. Further discussion of related matters, including platform limitations, is on the Tcler's Wiki.

Visual Basic

Method 1

The first method involves querying the screen dimensions and then subtracting pixels used by the frame and desktop bars:

TYPE syswindowstru
  screenheight AS INTEGER
  screenwidth AS INTEGER
  maxheight AS INTEGER
  maxwidth AS INTEGER
END TYPE

DIM syswindow AS syswindowstru

' Determine the height and width of the screen

syswindow.screenwidth = Screen.Width / Screen.TwipsPerPixelX
syswindow.screenheight=Screen.Height / Screen.TwipsPerPixelY

' Make adjustments for window decorations and menubars

Method 2

The alternative method is to create a form that is maximized and then query its dimensions (similar to the method used in gambas).

Visual Basic .NET

Compiler: Roslyn Visual Basic (language version >= 14, e.g. with Visual Studio 2015)

Works with: .NET Framework version 4.7.2

(simple enough that it should probably work on every Framework version--.NET Core 3.0 will support Windows Forms on Windows only)

Must be referenced:

Library: GDI+

(managed interface) [System.Drawing]

Library: Windows Forms

[System.Windows.Forms]

Bounds are the screen's dimensions; working area is the is the region that excludes "taskbars, docked windows, and docked tool bars" (from Framework documentation).

Imports System.Drawing
Imports System.Windows.Forms

Module Program
    Sub Main()
        Dim bounds As Rectangle = Screen.PrimaryScreen.Bounds
        Console.WriteLine($"Primary screen bounds:  {bounds.Width}x{bounds.Height}")

        Dim workingArea As Rectangle = Screen.PrimaryScreen.WorkingArea
        Console.WriteLine($"Primary screen working area:  {workingArea.Width}x{workingArea.Height}")
    End Sub
End Module

Output:

Primary screen bounds:  1714x1143
Primary screen working area:  1714x1103

Alternatively, use the dimensions of a borderless form with WindowState set to FormWindowState.Maximized (i.e. a full-screen window that is shown above the taskbar).

Imports System.Drawing
Imports System.Windows.Forms

Module Program
    Sub Main()
        Using f As New Form() With {
            .WindowState = FormWindowState.Maximized,
            .FormBorderStyle = FormBorderStyle.None
            }

            f.Show()
            Console.WriteLine($"Size of maximized borderless form:  {f.Width}x{f.Height}")
        End Using
    End Sub
End Module

Output:

Size of maximized borderless form:  1714x1143

V (Vlang)

Graphical

import ui
import gg
import gx

[heap]
struct App {
	mut:
	window &ui.Window = unsafe {nil}
}

fn main() {
	mut app := &App{}
	app.window = ui.window(
		width: gg.screen_size().width
		height: gg.screen_size().height
		bg_color: gx.white
		title: "Maximum Window"
		mode: .resizable
		layout: ui.row(
			spacing: 5
			margin_: 10
			widths: ui.stretch
			heights: ui.stretch
			children: [
				ui.label(
					id: "info"
					text: "Window dimensions: W ${gg.screen_size().width} x H ${gg.screen_size().height}"
				),
			]
		)
	)
	ui.run(app.window)
}

Wren

Library: DOME

import "input" for Keyboard
import "dome" for Window, Process
import "graphics" for Canvas, Color

class Game {
    static init() {
        Canvas.print("Maximize the window and press 'm'", 0, 0, Color.white)
    }

    static update() {
        if (Keyboard.isKeyDown("m") ) {
            System.print("Maximum window dimensions are %(Window.width) x %(Window.height)")
            Process.exit(0)
        }
    }

    static draw(alpha) {}
}

Output:

$ ./dome max_window_dimensions.wren
Maximum window dimensions are 1853 x 1018

XPL0

GetFB is a built-in function available on the Raspberry Pi that returns information about the current frame buffer.

int A;
[A:= GetFB;
Text(0, "Width =  "); IntOut(0, A(0));  CrLf(0);
Text(0, "Height = "); IntOut(0, A(1));  CrLf(0);
]

Output:

Width =  1280
Height = 720