GUI/Maximum window dimensions

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

<lang Ada>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;</lang> 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. <lang AutoHotkey>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)"

}</lang> 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.

BBC BASIC

Works with: BBC BASIC for Windows

<lang bbcbasic> 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%</lang>

Output:

Maximum width = 1367
Maximum height = 1021

Creative Basic

<lang 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. </lang>

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. <lang EGL> browser Browser{}; bvh int = browser.getViewportHeight(); bvw int = browser.getViewportWidth(); SysLib.writeStdout("ViewportHeight: " + bvh); SysLib.writeStdout("ViewportWidth: " + bvw); </lang> 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: <lang qbasic>#INCLUDE <Include\Windows.inc> ShowWindow(ME, SW_MAXIMIZE) BEGIN EVENTS END EVENTS</lang>

Alternatively, one can obtain the unobscured area's dimensions using the following console script: <lang qbasic>#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</lang>

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

width = 1680, height = 1017

Press any key to continue...

FreeBASIC

<lang 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</lang> Output for my machine:

Output:

Maximum usable desktop area :  W 1366 x H 728 pixels

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:

<lang gambas>FMain.Maximized = True FMain.Visible = False ' The form can be invisible</lang>

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:

<lang gambas>PUBLIC SUB _new()

END

PUBLIC SUB Form_Open()

END</lang>

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:

<lang gambas>PUBLIC SUB Form_Resize()

 PRINT "The maximum window size that can be used without scrolling is "; FMain.Width; " x "; FMain.Height

END</lang>

Groovy

<lang groovy>def window = java.awt.GraphicsEnvironment.localGraphicsEnvironment.maximumWindowBounds

println "width: $window.width, height: $window.height"</lang>

Haskell

<lang 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</lang>

Icon and Unicon

Raise and query a hidden window. <lang Icon>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</lang>

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

<lang 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. </lang>

Java

<lang 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);
   }

}</lang>

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]

Kotlin

Translation of: Java

<lang scala>// 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()

}</lang> 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

<lang lingo>put _system.desktopRectList -- [rect(0, 0, 1360, 768), rect(1360, 0, 2960, 1024)]</lang>

Mathematica / Wolfram Language

Example output on a 1280x1024 system. <lang Mathematica>Differences@Transpose@SystemInformation["Devices"]1, 2, 1, 1, 2 ->Template:1260, 951</lang>

Nim

Library: Gdk2

Library: Gtk2

<lang nim>import

 gtk2, gdk2

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

Output:

WxH=1280x800

Library: IUP

<lang nim>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()</lang>

Output:

1280x800
1280x800
0 0 1280 800

0 0 1280 800
65535x65535

PARI/GP

<lang parigp>plothsizes()[1..2]</lang>

Perl

Library: Perl/Tk

<lang Perl> use strict; use warnings; use Tk;

sub get_size { my $mw = MainWindow->new(); return ($mw->maxsize); } </lang> get_size returns (1425,870) here.

Phix

Translation of: Nim

<lang Phix>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()</lang>

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. <lang 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) )</lang>

Output (on a 1024x768 screen):

Width: 1010
Height: 735

PureBasic

<lang 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</lang> Sample output for a screen area 1600 x 1200:

Maximum Window Width: 1600, Maximum Window Height: 1181

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) </lang>

Ring

<lang 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()
               }

</lang>

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

html "<script> </script> "</lang>

Sidef

Using the Tk library: <lang ruby>require('Tk')

func max_window_size() -> (Number, Number) {

   %s'MainWindow'.new.maxsize;

}

var (width, height) = max_window_size(); say (width, 'x', height);</lang>

Output:

1905x1050

Tcl

Library: Tk

<lang tcl>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]

}</lang> 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:

<lang vb>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</lang>

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).