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.
Ctrl + Win + Alt + UP	Window will snap to the top third of the screen.
Ctrl + Win + Alt + DOWN	Window will snap to the bottom third 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.

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

Changelog

• v1.00, 08 Jan 2015
  • Initial Version

Recommendation For Editing AHK Files

If you plan on working with AutoHotKey files, consider using Sublime Text 3. Read my steps for setting up Sublime Text 3 to edit AutoHotKey files here: Working with AutoHotKey in Sublime Text.

AdvancedWindowSnap.ahk

/**
 * Advanced Window Snap
 * Snaps the Active Window to one of nine different window positions.
 *
 * @author Andrew Moore <[email protected]>
 * @version 1.0
 */

/**
 * 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".
 */
SnapActiveWindow(winPlaceVertical, winPlaceHorizontal, winSizeHeight) {
    WinGet activeWin, ID, A
    activeMon := GetMonitorIndexFromWindow(activeWin)

    SysGet, MonitorWorkArea, MonitorWorkArea, %activeMon%

    if (winSizeHeight == "half") {
        height := (MonitorWorkAreaBottom - MonitorWorkAreaTop)/2
    } else {
        height := (MonitorWorkAreaBottom - MonitorWorkAreaTop)/3
    }

    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
    }

    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%
}

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

; 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")

; Numberpad Hotkeys (Portrait)
^#!Numpad8::SnapActiveWindow("top","full","third")
^#!Numpad5::SnapActiveWindow("middle","full","third")
^#!Numpad2::SnapActiveWindow("bottom","full","third")