#Persistent


hover_task_buttons  = 0 ; hover over taskbar button to activate window
  hover_task_group  = 0 ; hover to select (or exit) from a window-group menu
                        ; (for Windows' "Group similar taskbar buttons" feature)
hover_task_min_info = 0 ; only show info for minimized windows, don't activate
hover_start_button  = 1 ; hover over start button to open start menu
hover_min_max       = 0 ; minimize or maximize by hovering over the min/max buttons
hover_any_window    = 1 ; activate any window by hovering (except the taskbar)

hover_no_buttons    = 0 ; ignore hover if a mouse button is in the down state

hover_delay       = 0 ; hover delay, from when the mouse stops moving

; WORKS, BUT NOT PERFECTLY: (brings the window forward, then puts it back in place)
hover_keep_zorder   = 0 ; don't bring windows forward, only activate them

;
; DisableHover - since menus aren't usually truly "activated", if any
;   window in the DisableHover group *EXISTS*, hover will be ignored.
;
GroupAdd, DisableHover, ahk_class #32768

; I'm not certain whether this class is used only for menus;
; if not, you may need to comment out this line.
GroupAdd, DisableHover, ahk_class MozillaDropShadowWindowClass


CoordMode, Mouse, Screen
SetTimer, hovercheck, 10
return


; Don't consider it hovering if the mouse was clicked.
; However, clicking and then moving a small amount will still trigger hover.
~LButton::
~RButton::
~MButton::
    MouseGetPos, lastx, lasty
return


hovercheck:
    MouseGetPos, x, y
    if (x != lastx or y != lasty)
    {
        SetTimer, hovering, % -hover_delay
        lastx := x
        lasty := y

        if (remove_ttip_on_move)
        {
            ToolTip
            remove_ttip_on_move := false
        }
    }
return


hovering:
    if (hover_no_buttons && (GetKeyState("LButton") or GetKeyState("RButton")))
        return
   
    if (WinExist("ahk_group DisableHover"))
        return

; hover over taskbar button to activate window:
    if (hover_task_buttons)
    {   ; hovering over taskbar button.
        if (GetMouseTaskButton(win))
        {
            if (win)
            {
                if (hover_task_min_info)
                {
                    WinGet, min_max, MinMax, ahk_id %win%
                    if (min_max = -1)
                    {
                        WinGetTitle, ti, ahk_id %win%
                        ToolTip, %ti% (minimized)
                        remove_ttip_on_move := true
                        return
                    }
                }
                if (hover_keep_zorder)
                {
                    JustActivate(win)
                    return
                }
                WinActivate, ahk_id %win%
            }
            ; May be a group button ("Group similar taskbar buttons")
            else
                Click
            return
        }
        else if (hover_task_group && WinActive("ahk_class Shell_TrayWnd"))
        {   ; Check if we are hovering over a toolbar window,
            ; possibly a list of grouped buttons/windows.
            MouseGetPos,,, win, ctl, 2
            ctl_parent := DllCall("GetParent", "uint", ctl) ; get control parent
            WinGetClass, ctl, ahk_id %ctl%                  ; get control class
            WinGetClass, ctl_parent, ahk_id %ctl_parent%    ; get parent class
            WinGetClass, win, ahk_id %win%                  ; get window class
            if (win="BaseBar"                       ; probably a button group menu
                || (win="Shell_TrayWnd"             ; taskbar
                 && ctl_parent="MSTaskSwWClass"))   ; task buttons
                Click
            ; (The win="BaseBar" check excludes the system notification area.)
            return
        }
    }
; hover over start button to open start menu:
    if (hover_start_button && !WinActive("ahk_class DV2ControlHost")) ; Start Menu
    {
        MouseGetPos,,, win, ctl
        WinGetTitle, ti, ahk_id %win%
        WinGetClass, cl, ahk_id %win%
        if (A_OSVersion = "WIN_VISTA" && (cl = "Button" && ti = "Start"))
            or (cl = "Shell_TrayWnd" && ctl = "Button1")
        {
            Click
            return
        }
    }
; hover over minimize, maximize or help buttons on titlebar:
    if (hover_min_max)
    {
        MouseGetPos, x, y, win, ctl, 2
        SendMessage, 0x84,, (x & 0xFFFF) | (y & 0xFFFF) << 16,, % "ahk_id " (ctl ? ctl : win)
        if ErrorLevel in 8,9  ; min,max (titlebar)
        {
            Click
            return
        }
    }
; hover over any window to focus:
    if (hover_any_window)
    {
        ifWinExist, ahk_id %win% ahk_class Shell_TrayWnd
            return  ; don't activate the taskbar
        MouseGetPos,,, win
        if (!WinActive("ahk_id " win)) {
            if (hover_keep_zorder)
                JustActivate(win)
            else
                WinActivate, ahk_id %win%
        }
    }
return


JustActivate(hwnd)
{
    if (WinActive("ahk_id " hwnd))
        return
   
    ; Get the window which hwnd is positioned after, so hwnd's position
    ; in the z-order can be restored after activation.   
    hwnd_prev := GetPrevWindow(hwnd)
    ; DllCall("GetWindow","uint",hwnd,"uint",3) would be simpler,
    ; but doesn't work right since it usually gets an invisible window
    ; which moves when we activate hwnd.
   
    ; Repositioning a window in the z-order sometimes sets AlwaysOnTop.
    WinGet, OldExStyle, ExStyle, ahk_id %hwnd%
   
    ;WinActivate, ahk_id %hwnd%  ; -- best to use SetWinDelay,-1 if using WinActivate.
    DllCall("SetForegroundWindow", "uint", hwnd)
    DllCall("SetWindowPos", "uint", hwnd, "uint", hwnd_prev
        , "int", 0, "int", 0, "int", 0, "int", 0
        , "uint", 0x13)  ; NOSIZE|NOMOVE|NOACTIVATE (0x1|0x2|0x10)
   
    ; Note NOACTIVATE above: if this is not specified, SetWindowPos activates
    ; the window, bringing it forward (effectively ignoring hwnd_prev...)

    ; Check if AlwaysOnTop status changed.   
    WinGet, ExStyle, ExStyle, ahk_id %hwnd%
    if (OldExStyle ^ ExStyle) & 0x8
        WinSet, AlwaysOnTop, Toggle
}

; Like GetWindow(hwnd, GW_HWNDPREV), but ignores invisible windows.
GetPrevWindow(hwnd)
{
    global GetPrevWindow_RetVal

    static cb_EnumChildProc
    if (!cb_EnumChildProc)
        cb_EnumChildProc := RegisterCallback("GetPrevWindow_EnumChildProc","F")

    ; Set default in case enumeration fails.
    GetPrevWindow_RetVal := DllCall("GetWindow", "uint", hwnd, "uint", 3)
   
    ; Enumerate all siblings of hwnd.
    hwnd_parent := DllCall("GetParent", "uint", hwnd)
    DllCall("EnumChildWindows", "uint", hwnd_parent, "uint", cb_EnumChildProc, "uint", hwnd)
   
    ; Return the last visible window before hwnd.
    return GetPrevWindow_RetVal
}
GetPrevWindow_EnumChildProc(test_hwnd, hwnd)
{
    global GetPrevWindow_RetVal
    ; Continue until hwnd is enumerated.
    if (test_hwnd = hwnd)
        return false
    ; Remember the last visible window before hwnd.
    if (DllCall("IsWindowVisible", "uint", test_hwnd))
        GetPrevWindow_RetVal := test_hwnd
    return true
}


; Gets the index+1 of the taskbar button which the mouse is hovering over.
; Returns an empty string if the mouse is not over the taskbar's task toolbar.
;
; Some code and inspiration from Sean's TaskButton.ahk
GetMouseTaskButton(ByRef hwnd)
{
    MouseGetPos, x, y, win, ctl, 2
    ; Check if hovering over taskbar.
    WinGetClass, cl, ahk_id %win%
    if (cl != "Shell_TrayWnd")
        return
    ; Check if hovering over a Toolbar.
    WinGetClass, cl, ahk_id %ctl%
    if (cl != "ToolbarWindow32")
        return
    ; Check if hovering over task-switching buttons (specific toolbar).
    hParent := DllCall("GetParent", "Uint", ctl)
    WinGetClass, cl, ahk_id %hParent%
    if (cl != "MSTaskSwWClass")
        return

   
    WinGet, pidTaskbar, PID, ahk_class Shell_TrayWnd

    hProc := DllCall("OpenProcess", "Uint", 0x38, "int", 0, "Uint", pidTaskbar)
    pRB := DllCall("VirtualAllocEx", "Uint", hProc
        , "Uint", 0, "Uint", 20, "Uint", 0x1000, "Uint", 0x4)

    VarSetCapacity(pt, 8, 0)
    NumPut(x, pt, 0, "int")
    NumPut(y, pt, 4, "int")
   
    ; Convert screen coords to toolbar-client-area coords.
    DllCall("ScreenToClient", "uint", ctl, "uint", &pt)
   
    ; Write POINT into explorer.exe.
    DllCall("WriteProcessMemory", "uint", hProc, "uint", pRB+0, "uint", &pt, "uint", 8, "uint", 0)

;     SendMessage, 0x447,,,, ahk_id %ctl%  ; TB_GETHOTITEM
    SendMessage, 0x445, 0, pRB,, ahk_id %ctl%  ; TB_HITTEST
    btn_index := ErrorLevel
    ; Convert btn_index to a signed int, since result may be -1 if no 'hot' item.
    if btn_index > 0x7FFFFFFF
        btn_index := -(~btn_index) - 1
   
   
    if (btn_index > -1)
    {
        ; Get button info.
        SendMessage, 0x417, btn_index, pRB,, ahk_id %ctl%   ; TB_GETBUTTON
   
        VarSetCapacity(btn, 20)
        DllCall("ReadProcessMemory", "Uint", hProc
            , "Uint", pRB, "Uint", &btn, "Uint", 20, "Uint", 0)
   
        state := NumGet(btn, 8, "UChar")  ; fsState
        pdata := NumGet(btn, 12, "UInt")  ; dwData
       
        ret := DllCall("ReadProcessMemory", "Uint", hProc
            , "Uint", pdata, "UintP", hwnd, "Uint", 4, "Uint", 0)
    } else
        hwnd = 0

       
    DllCall("VirtualFreeEx", "Uint", hProc, "Uint", pRB, "Uint", 0, "Uint", 0x8000)
    DllCall("CloseHandle", "Uint", hProc)


    ; Negative values indicate seperator items. (abs(btn_index) is the index)
    return btn_index > -1 ? btn_index+1 : 0


}
F9::Pause