Advanced Window Snap is a script for AutoHotKey that expands upon Windows built-in window-snapping hotkeys.

README.md

Advanced Window Snap

Advanced Window Snap is a script for AutoHotKey that expands upon Windows built-in window-snapping hotkeys (which are Win + LEFT to snap an active window to the left half of a monitor and Win + RIGHT to snap a window to the right half of a monitor) by adding 9 additional snap methods.

Installation Steps

1. Install AutoHotKey
2. Copy or Download the AdvancedWindowSnap.ahk file to your computer and double click it to run it.
3. (Optional) To have the program run when you start up your computer, place the .ahk file into your computer's startup folder.
   • The Windows 7 Startup Folder can be accessed by mousing to Start > All Programs, then right-clicking on Startup and selecting "Open".
   • The Windows 8 Startup Folder can be accessed by tapping Win + R on your keyboard, then in the Open: field, type shell:startup then press Enter.

Advanced Window Snap Keybindings

Directional Arrow Hotkeys:

Hotkey	Behavior
Win + Alt + UP	Window will snap to the top half of the screen.
Win + Alt + DOWN	Window will snap to the bottom half of the screen.

Numberpad Hotkeys (Landscape):

These will work only if you have NumLock turned ON. These are ideal for Landscape Monitors.

Hotkey	Behavior
Win + Alt + Numpad 7	Window will snap to the top-left quarter of the screen.
Win + Alt + Numpad 8	Window will snap to the top half of the screen.
Win + Alt + Numpad 9	Window will snap to the top-right quarter of the screen.
Win + Alt + Numpad 1	Window will snap to the bottom-left quarter of the screen.
Win + Alt + Numpad 2	Window will snap to the bottom half of the screen.
Win + Alt + Numpad 3	Window will snap to the bottom-right quarter of the screen.
Win + Alt + Numpad 4	Window will snap to the left half of the screen. (v2.0)
Win + Alt + Numpad 6	Window will snap to the right half of the screen. (v2.0)

Numberpad Hotkeys (Portrait):

These will work only if you have NumLock turned ON. These are ideal for Portrait Monitors.

Hotkey	Behavior
Ctrl + Win + Alt + Numpad 8	Window will snap to the top third of the screen.
Ctrl + Win + Alt + Numpad 5	Window will snap to the middle third of the screen.
Ctrl + Win + Alt + Numpad 2	Window will snap to the bottom third of the screen.
Ctrl + Win + Alt + Numpad 7	Window will snap to the left half top third of the screen. (v2.0)
Ctrl + Win + Alt + Numpad 4	Window will snap to the left half middle third of the screen. (v2.0)
Ctrl + Win + Alt + Numpad 1	Window will snap to the left half bottom third of the screen. (v2.0)
Ctrl + Win + Alt + Numpad 9	Window will snap to the right half top third of the screen. (v2.0)
Ctrl + Win + Alt + Numpad 6	Window will snap to the right half middle third of the screen. (v2.0)
Ctrl + Win + Alt + Numpad 3	Window will snap to the right half bottom third of the screen. (v2.0)

Zone Snapping (v2.0)

Hold down Ctrl + Win followed by any set of numpad numbers. The monitor will be split up into a 3x3 grid, the window will be arranged to accomodate the keys pressed once the Ctrl + Win are released (Order does not matter). Here are some examples:

Hotkey	Numpad 3
_	_	_
_	_	_
_	_	X

Hotkey	Numpad 5
_	_	_
_	X	_
_	_	_

Hotkey	Numpad 3	Numpad 4
_	_	_
X	X	X
X	X	X

Hotkey	Numpad 7	Numpad 5
X	X	_
X	X	_
_	_	_

Changelog

• v1.00, 08 Jan 2015
  • Initial Version
• v2.00, 2017-11-21
  • Add additional snap options
  • Add go to next monitor if the snap point is identical
  • Add numpad grid/zone snapping
• v2.10, 2017-11-24
  • Rejig positions and widths for SnapActiveWindowAdvanced function
  • Add special case support for clover to SnapActiveWindowAdvanced function

AdvancedWindowSnap.ahk

/**
 * Advanced Window Snap (Extended
 * Snaps the Active Window to one of nine different window positions.
 *
 * @Editing author Jarrett Urech
 * @Original author Andrew Moore <[email protected]>
 * @version 2.1
 *
**/

/**
 * SnapActiveWindow resizes and moves (snaps) the active window to a given position.
 * @param {string} winPlaceVertical   The vertical placement of the active window.
 *                                    Expecting "bottom" or "middle", otherwise assumes
 *                                    "top" placement.
 * @param {string} winPlaceHorizontal The horizontal placement of the active window.
 *                                    Expecting "left" or "right", otherwise assumes
 *                                    window should span the "full" width of the monitor.
 * @param {string} winSizeHeight      The height of the active window in relation to
 *                                    the active monitor's height. Expecting "half" size,
 *                                    otherwise will resize window to a "third".
 */

#NoEnv
#NoTrayIcon
#SingleInstance force
#MaxThreads 1


SnapActiveWindow(winPlaceVertical, winPlaceHorizontal, winSizeHeight, activeMon := 0) {
    WinGet activeWin, ID, A
	SysGet, MonitorCount, MonitorCount
	
    if (!activeMon) {
		activeMon := GetMonitorIndexFromWindow(activeWin)
	} else if (activeMon > MonitorCount) {
		activeMon := 1
	}
	
    SysGet, MonitorWorkArea, MonitorWorkArea, %activeMon%
	
    if (winSizeHeight == "half") {
        height := (MonitorWorkAreaBottom - MonitorWorkAreaTop)/2
    } else if (winSizeHeight == "third") {
        height := (MonitorWorkAreaBottom - MonitorWorkAreaTop)/3
    } else {
		height := (MonitorWorkAreaBottom - MonitorWorkAreaTop)
	}

    if (winPlaceHorizontal == "left") {
        posX  := MonitorWorkAreaLeft
        width := (MonitorWorkAreaRight - MonitorWorkAreaLeft)/2
    } else if (winPlaceHorizontal == "right") {
        posX  := MonitorWorkAreaLeft + (MonitorWorkAreaRight - MonitorWorkAreaLeft)/2
        width := (MonitorWorkAreaRight - MonitorWorkAreaLeft)/2
    } else {
        posX  := MonitorWorkAreaLeft
        width := MonitorWorkAreaRight - MonitorWorkAreaLeft
    }

    if (winPlaceVertical == "bottom") {
        posY := MonitorWorkAreaBottom - height
    } else if (winPlaceVertical == "middle") {
        posY := MonitorWorkAreaTop + height
    } else {
        posY := MonitorWorkAreaTop
    }
	
	; Rounding
	posX := floor(posX)
	posY := floor(posY)
	width := floor(width)
	height := floor(height)
	
	; Borders (Windows 10)
	SysGet, BorderX, 32
	SysGet, BorderY, 33
	if (BorderX) {
		posX := posX - BorderX
		width := width + (BorderX * 2)
	}
	if (BorderY) {
		height := height + BorderY
	}
	
	; If window is already there move to same spot on next monitor
	WinGetPos, curPosX, curPosY, curWidth, curHeight, A
	if ((posX = curPosX) && (posY = curPosY) && (width = curWidth) && (height = curHeight)) {
		activeMon := activeMon + 1
		SnapActiveWindow(winPlaceVertical, winPlaceHorizontal, winSizeHeight, activeMon)
	} else {
		WinMove,A,,%posX%,%posY%,%width%,%height%
	}
}

/**
 * GetMonitorIndexFromWindow retrieves the HWND (unique ID) of a given window.
 * @param {Uint} windowHandle
 * @author shinywong
 * @link http://www.autohotkey.com/board/topic/69464-how-to-determine-a-window-is-in-which-monitor/?p=440355
 */
GetMonitorIndexFromWindow(windowHandle) {
    ; Starts with 1.
    monitorIndex := 1

    VarSetCapacity(monitorInfo, 40)
    NumPut(40, monitorInfo)

    if (monitorHandle := DllCall("MonitorFromWindow", "uint", windowHandle, "uint", 0x2))
        && DllCall("GetMonitorInfo", "uint", monitorHandle, "uint", &monitorInfo) {
        monitorLeft   := NumGet(monitorInfo,  4, "Int")
        monitorTop    := NumGet(monitorInfo,  8, "Int")
        monitorRight  := NumGet(monitorInfo, 12, "Int")
        monitorBottom := NumGet(monitorInfo, 16, "Int")
        workLeft      := NumGet(monitorInfo, 20, "Int")
        workTop       := NumGet(monitorInfo, 24, "Int")
        workRight     := NumGet(monitorInfo, 28, "Int")
        workBottom    := NumGet(monitorInfo, 32, "Int")
        isPrimary     := NumGet(monitorInfo, 36, "Int") & 1

        SysGet, monitorCount, MonitorCount

        Loop, %monitorCount% {
            SysGet, tempMon, Monitor, %A_Index%

            ; Compare location to determine the monitor index.
            if ((monitorLeft = tempMonLeft) and (monitorTop = tempMonTop)
                and (monitorRight = tempMonRight) and (monitorBottom = tempMonBottom)) {
                monitorIndex := A_Index
                break
            }
        }
    }
	
    return %monitorIndex%
}

dynamicPickup(initial:=0) {
	; Pickup the initial keypress
	pressed%initial% := true
	
	; Disable Additional Presses
	loop 9
		Hotkey, ^#Numpad%A_Index%, dynamicPickup, Off
	
	; Pickup Areas
	while (GetKeyState("Control") || GetKeyState("LWin") || GetKeyState("RWin")) {
		if (GetKeyState("Numpad1"))
			pressed1 := true
		if (GetKeyState("Numpad2"))
			pressed2 := true
		if (GetKeyState("Numpad3"))
			pressed3 := true
		if (GetKeyState("Numpad4"))
			pressed4 := true
		if (GetKeyState("Numpad5"))
			pressed5 := true
		if (GetKeyState("Numpad6"))
			pressed6 := true
		if (GetKeyState("Numpad7"))
			pressed7 := true
		if (GetKeyState("Numpad8"))
			pressed8 := true
		if (GetKeyState("Numpad9"))
			pressed9 := true
	}
	
	; Calc Window Height
	height:=0
	if ((pressed1 || pressed2 || pressed3) && (pressed7 || pressed8 || pressed9)) {
		height := 3
	} else {
		if (pressed1 || pressed2 || pressed3)
			height := height + 1
		if (pressed4 || pressed5 || pressed6)
			height := height + 1
		if (pressed7 || pressed8 || pressed9)
			height := height + 1
	}
		
	
	; Calc Window Width
	width:=0
	if ((pressed1 || pressed4 || pressed7) && (pressed3 || pressed6 || pressed9)) {
		width := 3
	} else {
		if (pressed1 || pressed4 || pressed7)
			width := width + 1
		if (pressed2 || pressed5 || pressed8)
			width := width + 1
		if (pressed3 || pressed6 || pressed9)
			width := width + 1
	}
	
	; Calc Anchor Point (matches numpad for zones) (order matters here)
	anchor := 0
	if (pressed3 && (height = 1))
		anchor := 9
	if (pressed2 && (height = 1))
		anchor := 8
	if (pressed1 && (height = 1))
		anchor := 7
	if (pressed6 && (height < 3))
		anchor := 6
	if ((pressed5 || (pressed2 && pressed6)) && (height < 3))
		anchor := 5
	if ((pressed4 || (pressed1 && (pressed5 || pressed6))) && (height < 3))
		anchor := 4
	if (pressed9)
		anchor := 3
	if (pressed8 || (pressed9 && (pressed5 || pressed2)))
		anchor := 2
	if (pressed7 || ((pressed4 || pressed1) && (pressed8 || pressed9)))
		anchor := 1
		
	; Set This window up!
	SnapActiveWindowAdvanced(anchor, width, height)
	
	; Enable Hotkeys
	loop 9
		Hotkey, ^#Numpad%A_Index%, dynamicPickup, On
}

SnapActiveWindowAdvanced(anchor, widthUnit, heightUnit, snapGrid := 3,activeMon := 0) {
	; SnapGrid units are the width/height of the active monitor evenly split into the snapgrid number
	; Width and Height is multiples of snapGrid units
	; The anchor points are arranged in order from left to right, top to bottom
	
    WinGet activeWin, ID, A
	SysGet, MonitorCount, MonitorCount
	
    if (!activeMon) {
		activeMon := GetMonitorIndexFromWindow(activeWin)
	} else if (activeMon > MonitorCount) {
		activeMon := 1
	}
	
    SysGet, MonitorWorkArea, MonitorWorkArea, %activeMon%
	
	; Snap Units
	unitX := (MonitorWorkAreaRight - MonitorWorkAreaLeft) / snapGrid
	unitY := (MonitorWorkAreaBottom - MonitorWorkAreaTop) / snapGrid
	
	; Resolve Anchor
	posX := MonitorWorkAreaLeft + (unitX * Mod(anchor - 1, snapGrid))
	posY := MonitorWorkAreaTop + (unitY * floor((anchor - 1) / snapGrid) - 1)

	; Calculate size as a percentage of the screen
	width := (MonitorWorkAreaLeft + (unitX * (Mod(anchor - 1, snapGrid) + widthUnit))) - posX
	if ((posX + width) > (MonitorWorkAreaRight - 50))
		width := MonitorWorkAreaRight - (posX - 1)
	
	height := (MonitorWorkAreaTop + (unitY * (floor((anchor - 1) / snapGrid) + heightUnit) - 1)) - posY
	if ((posY + height) > (MonitorWorkAreaBottom - 50))
		height := MonitorWorkAreaBottom - (posY - 1)
	
	; Clover Special Case [START] (http://en.ejie.me)
	; If the internal windows explorer window is selected then switch to clover wrapper
	IfWinActive, ahk_class CabinetWClass ahk_exe explorer.exe
	{
		WinGetPos, expX, expY,,, A
		WinGet, id, list,,, Program Manager
		Loop, %id% {
			this_id := id%A_Index%
			WinGetPos, clovX, clovY,,, ahk_id %this_id%
			if (((expX - 8) = clovX) && ((expY - 18) = clovY)) {
				WinActivate, ahk_id %this_id%
				break
			}
		}
	}
	; Adjust limits to accomodate the wrapper dimensions
	IfWinActive, ahk_class Clover_WidgetWin_0 ahk_exe clover.exe
	{
		posX := posX + 2
		width := width - 4
		height := height - 3
	}
	; Clover Special Case [END]
	
	; Borders (Windows 10)
	SysGet, BorderX, 32
	SysGet, BorderY, 33
	if (BorderX) {
		posX := (posX + 1) - BorderX
		width := (width - 2) + (BorderX * 2)
	}
	if (BorderY) {
		height := height + BorderY
	}
	
	; Rounding
	posX := floor(posX)
	posY := floor(posY)
	width := floor(width)
	height := floor(height)
	
	; If window is already there move to same spot on next monitor
	WinGetPos, curPosX, curPosY, curWidth, curHeight, A
	if ((posX = curPosX) && (posY = curPosY) && (width = curWidth) && (height = curHeight)) {
		activeMon := activeMon + 1
		SnapActiveWindowAdvanced(anchor, widthUnit, heightUnit, snapGrid, activeMon)
	} else {
		WinRestore, A
		WinMove,A,,%posX%,%posY%,%width%,%height%
	}
}

; Dynamic Snapping
loop 9
	Hotkey, ^#Numpad%A_Index%, dynamicPickup, On
return

; Dynamic Hook Function
dynamicPickup:
	dynamicPickup(SubStr(A_ThisHotkey,0))
return

; Directional Arrow Hotkeys
#!Up::SnapActiveWindow("top","full","half")
#!Down::SnapActiveWindow("bottom","full","half")

; Numberpad Hotkeys (Landscape)
#!Numpad7::SnapActiveWindow("top","left","half")
#!Numpad8::SnapActiveWindow("top","full","half")
#!Numpad9::SnapActiveWindow("top","right","half")
#!Numpad1::SnapActiveWindow("bottom","left","half")
#!Numpad2::SnapActiveWindow("bottom","full","half")
#!Numpad3::SnapActiveWindow("bottom","right","half")
#!Numpad4::SnapActiveWindow("top","left","full")
#!Numpad6::SnapActiveWindow("top","right","full")

; Numberpad Hotkeys (Portrait)
^#!Numpad8::SnapActiveWindow("top","full","third")
^#!Numpad5::SnapActiveWindow("middle","full","third")
^#!Numpad2::SnapActiveWindow("bottom","full","third")
^#!Numpad7::SnapActiveWindow("top","left","third")
^#!Numpad4::SnapActiveWindow("middle","left","third")
^#!Numpad1::SnapActiveWindow("bottom","left","third")
^#!Numpad9::SnapActiveWindow("top","right","third")
^#!Numpad6::SnapActiveWindow("middle","right","third")
^#!Numpad3::SnapActiveWindow("bottom","right","third")

This doesn't seem to work on my vertical monitor. The original script worked perfectly. When spiting two windows to top half and bottom half they are both over 100 pixels too long on the bottom. So the top window overlaps with the bottom one, and the bottom window extends below the screen.

Thank mate. Worked on 2x 4k monitor on portrait (Windows Snap or Windock do not work). Thank you.

Anyway to modify to split windows in (3) on horizontal monitor as well? Same as portrait but for horizontal?

And anyway to split browser tabs (firefox/chrome)

This is awesome, thank you.