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PhiLho
Joined: 27 Dec 2005
Posts: 6721
Location: France (near Paris)
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 Posted: Mon Feb 13, 2006 5:46 pm Post subject: GetDesktopArea function |
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[EDIT] As pointed in next message, there is a built-in command for this:
SysGet mon, MonitorWorkArea
Sorry for the noise.
I left the original message below.
---
Althought I found some related topics, I have not seen a function that just return the usable desktop area, ie. the desktop area minus the taskbar and various other possible toolbars.
It can be useful to snap windows to a side of this area, for example (a limitation of Titan's WindowSizing inspired this hack).
So I made this function, designed to be simple to use and fast: I compute the values once, then "cache" them and return them on demand. I had to do that because AutoHotkey cannot return an array or a structure.
| Code: | /*
// Call this function with "x", "y", "w" or "h" parameter
// to get respectively the top-left coordinates of the desktop area,
// its width or its height.
// The "desktop area" is the screen minus docked toolbars like the taskbar.
*/
GetDesktopArea(p)
{
static sbSet, sX, sY, sW, sH
If not sbSet
{
; http://support.microsoft.com/support/kb/articles/Q154/8/23.asp
; RECT structure: left, top, right, bottom
VarSetCapacity(desktopAreaRect, 16)
DllCall("SystemParametersInfo"
, "UInt", 0x30 ; uiAction=SPI_GETWORKAREA
, "UInt", 0 ; uiParam
, "UInt", &desktopAreaRect ; PVOID pvParam
, "UInt", 0) ; fWinIni
sX := GetLong(desktopAreaRect, 1)
sY := GetLong(desktopAreaRect)
sW := GetLong(desktopAreaRect) - sX
sH := GetLong(desktopAreaRect) - sY
sbSet := true
}
IfEqual p, x, Return sX
IfEqual p, y, Return sY
IfEqual p, w, Return sW
IfEqual p, h, Return sH
}
GetLong(ByRef struct, pos=0)
{
local sa
static sPos
If (pos != 0)
{
; Reset
sPos = pos
}
Else
{
; Next
sPos++
}
; Long: 32 bits = 4 bytes
sa := &struct + (sPos - 1) * 4
Return *sa + (*(sa+1) << 8) + (*(sa+2) << 16) + (*(sa+3) << 24)
}
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Test: | Code: | x := GetDesktopArea("x")
y := GetDesktopArea("y")
w := GetDesktopArea("w")
h := GetDesktopArea("h")
MsgBox %x% - %y% - %w% - %h% |
Easy enough? 
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Last edited by PhiLho on Tue Feb 14, 2006 9:54 am; edited 1 time in total |
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Laszlo
Joined: 14 Feb 2005
Posts: 4078
Location: Pittsburgh
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| Posted: Mon Feb 13, 2006 10:04 pm Post subject: |
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What's wrong with | Code: | SysGet Mon, MonitorWorkArea
MsgBox %MonLeft% - %MonTop% - %MonRight% - %MonBottom% |
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PhiLho
Joined: 27 Dec 2005
Posts: 6721
Location: France (near Paris)
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| Posted: Tue Feb 14, 2006 8:50 am Post subject: |
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That it is hard to find?   Or too simple to use? 
I stupidly overlooked this one, searching the SPI_GETWORKAREA constant in the page...
It was surprising that Chris didn't provided such a function, it is nice that I was wrong Looks like I reinvented the wheel
Note: either moderator suppress this obsolete thread, or keep it as the trick of cached variables may inspire other people. But I can reuse it in other scripts.
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toralf
Joined: 31 Jan 2005
Posts: 3841
Location: Bremen, Germany
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| Posted: Tue Feb 14, 2006 9:01 am Post subject: |
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You should edit your first post and mention that there is a simpler solution. So that users find it right away.
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Ciao
toralf  |
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JSLover
Joined: 20 Dec 2004
Posts: 541
Location: LooseChange911.com... the WTC attacks were done by the US Gov't... the official story is a lie...
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| Posted: Tue Feb 14, 2006 9:19 am Post subject: |
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| Laszlo wrote: | | What's wrong with |
...or my SPI_GetWorkArea() / A_ScreenWidthWA() / A_ScreenHeightWA() functions...
| Code: | msgbox, % "0 - 0 - " A_ScreenWidthWA() " - " A_ScreenHeightWA()
;...is Left/Top ever not 0?...if so...
;msgbox, % SPI_GetWorkArea("Left") " - " SPI_GetWorkArea("Top") " - " A_ScreenWidthWA() " - " A_ScreenHeightWA()
SPI_GetWorkArea(which)
{
SysGet, WA, MonitorWorkArea
if which=top
return WATop
else if (which="bottom" || which="height")
return WABottom
else if which=left
return WALeft
else if (which="right" || which="width")
return WARight
}
A_ScreenWidthWA()
{
return SPI_GetWorkArea("width")
}
A_ScreenHeightWA()
{
return SPI_GetWorkArea("height")
} |
...why cache?...what if a toolbar is hidden/shown between calls?
I'd like A_ScreenWidthWA / A_ScreenHeightWA as builtin vars (& perhaps A_ScreenLeftWA / A_ScreenTopWA...if they are ever not 0)...& maybe A_ScreenLeftVirt / A_ScreenTopVirt / A_ScreenWidthVirt / A_ScreenHeightVirt (corresponding to the 76 / 77 / 78 / 79 values of the SysGet command).
PhiLho...when you link with p=48008 it's impossible to know which topic it belongs to...plus when you are linking to the 1st post (the topic, not a post in it) you should use...t=8007...or when linking to a post that's not on the 1st page...t=8007&p=48008#48008...it makes it clear which topic it belongs to.
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PhiLho
Joined: 27 Dec 2005
Posts: 6721
Location: France (near Paris)
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| Posted: Tue Feb 14, 2006 10:19 am Post subject: |
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Nothing. I searched for SystemParametersInfo, not for MonitorWorkArea...
At least, users reading this topic will have choice now
| JSLover wrote: | | ...why cache?...what if a toolbar is hidden/shown between calls? |
Remark is pertinent, but if screen configuration change between calls, you will get incorrect or inconsistent values anyway.
The SysGet command sets 4 variables at once, so at least it is consistent.
These variables can be local.
I see no way to do the same with a function call, keeping result local.
Hence the cache idea: maintain consistency, if not accuracy.
And probably of changes between two calls, which are likely to be successive, is very small.
| JSLover wrote: | | when you link with p=48008 it's impossible to know which topic it belongs too...plus you are linking to the 1st post...the topic, not a post in it... |
It was intentional, I was refering to the program made by Titan, not to a specific comment message. But finally, I understand what you mean by not knowing the topic (see below).
| JSLover wrote: | | you should use...t=8007...when linking to a topic |
Thank you for the tip.
Actually, I don't know how I got this p=48008 (which works), as I usually link to topics by copying the link from the list of topics for a given area.
I will try and be more attentive to this issue.
So, when I put p=xxx, I refer to a given post (the first one in my case), while a t=xxx refers to a given topic (or thread)? Using both designates topic and thread.
Thank you for the information.
I see that p=48008 is a reference to my post about this topic (why did I used it?), although using it alone display the whole topic... OK, I won't repeat the error now.
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