Zoom Zoom - Magnify utility w/ Zoom

[Fossil Rock]

This isn't completed yet due to my lack of algorithm writing skillz and understanding of the DLLCall used in the magnification routine.

It only works for 1x, 3x & 9x (1, 2 & 3 respectively on the numpad).

expandcollapse popup

; Example of zooming in on magnification area Orininal script @ http://www.autoitscript.com/forum/index.php?s=&showtopic=54080&view=findpost&p=409802

#include <A3LGDIPlus.au3>
#Include <Misc.au3>

Global Const $AC_SRC_ALPHA      = 1
Global Const $ULW_ALPHA         = 2
Global Const $c[9][2] = [[7,9],[0,0],[2,2],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0]]; Correction bits for Magnification window placement
$ZoomFactor = 1

; Create GUI
$hwnd = GUICreate("Zoom Zoom", 320, 220, -1, -1, -1, $WS_EX_TOPMOST)
GUISetBkColor(0xFFFFFF)

GUISetState()

$MyhWnd = GUICreate("Zoom", 300, 200, 10, 10, BitOR($WS_CHILD, $WS_TABSTOP), -1, $hwnd)
GUISetBkColor(0xFFFFFF, $MyhWnd)

While 1
    $msg = GUIGetMsg()
    Select
        Case $msg = $GUI_EVENT_CLOSE
            Exit

    EndSelect
_Zoom_Factor()
_Zoom($ZoomFactor)
WEnd

Func _Zoom_Factor(); Sets zoom factor ====== Only 1,3 & 9 work correctly ======
        Select
            Case _IsPressed("61")
                $ZoomFactor = 1
;           Case _IsPressed("62")
;               $ZoomFactor = 2
            Case _IsPressed("62");63
                $ZoomFactor = 3
;           Case _IsPressed("64")
;               $ZoomFactor = 4
;           Case _IsPressed("65")
;               $ZoomFactor = 5
;           Case _IsPressed("66")
;               $ZoomFactor = 6
;           Case _IsPressed("67")
;               $ZoomFactor = 7
;           Case _IsPressed("68")
;               $ZoomFactor = 8
            Case _IsPressed("63");69
                $ZoomFactor = 9
        EndSelect
EndFunc

Func _Zoom($zf); Modified from origial written by Larry, but he removed all his posts. Thanks anyway Larry.
    $pos = MouseGetPos()
    $a = $pos[0]
    $b = $pos[1]
    $MyHDC = DLLCall("user32.dll","int","GetDC","hwnd",$MyhWnd)
    If @error Then Return
        $DeskHDC = DLLCall("user32.dll","int","GetDC","hwnd",0)
        If Not @error Then
            $l = (($a - 140) + (140 * ($zf - 1)) / $zf) - $c[$zf-1][0]
            $t = (($b - 80) + (80 * ($zf - 1)) / $zf) - $c[$zf-1][1]
            DLLCall("gdi32.dll","int","StretchBlt","int",$MyHDC[0],"int", _
                    0,"int",0,"int",300 * $zf,"int",200 * $zf,"int",$DeskHDC[0],"int", _
                    $l,"int",$t,"int",300,"int",200,"long",$SRCCOPY)
        EndIf
        DLLCall("user32.dll","int","ReleaseDC","int",$DeskHDC[0],"hwnd",0)
    DLLCall("user32.dll","int","ReleaseDC","int",$MyHDC[0],"hwnd",$MyhWnd)
GUISetState()
Sleep(20)
EndFunc

Edited September 27, 2007 by Fossil Rock

[BrettF]

SCRIPT_PATH(10,16) : WARNING: $ZoomFactor possibly not declared/created yet

$ZoomFactor = 1

~~~~~~~~~~~~~~~^

SCRIPT_PATH(12,69) : WARNING: $hwnd possibly not declared/created yet

$hwnd = GUICreate("Zoom Zoom", 320, 220, -1, -1, -1, $WS_EX_TOPMOST)

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^

SCRIPT_PATH(17,93) : WARNING: $MyhWnd possibly not declared/created yet

$MyhWnd = GUICreate("MagItZoom", 300, 200, 10, 10, BitOR($WS_CHILD, $WS_TABSTOP), -1, $hwnd)

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^

SCRIPT_PATH(21,23) : WARNING: $msg possibly not declared/created yet

$msg = GUIGetMsg()

~~~~~~~~~~~~~~~~~~~~~~^

SCRIPT_PATH(55,25) : WARNING: $pos possibly not declared/created yet

$pos = MouseGetPos()

~~~~~~~~~~~~~~~~~~~~~~~~^

SCRIPT_PATH(56,17) : WARNING: $a possibly not declared/created yet

$a = $pos[0]

~~~~~~~~~~~~~~~~^

SCRIPT_PATH(57,17) : WARNING: $b possibly not declared/created yet

$b = $pos[1]

~~~~~~~~~~~~~~~~^

SCRIPT_PATH(58,64) : WARNING: $MyHDC possibly not declared/created yet

$MyHDC = DLLCall("user32.dll","int","GetDC","hwnd",$MyhWnd)

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^

SCRIPT_PATH(60,64) : WARNING: $DeskHDC possibly not declared/created yet

$DeskHDC = DLLCall("user32.dll","int","GetDC","hwnd",0)

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^

SCRIPT_PATH(62,71) : WARNING: $l possibly not declared/created yet

$l = (($a - 150) + (150 * ($zf - 1)) / $zf) - $c[$zf-1][0]

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^

SCRIPT_PATH(63,71) : WARNING: $t possibly not declared/created yet

$t = (($b - 100) + (100 * ($zf - 1)) / $zf) - $c[$zf-1][1]

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^

SCRIPT_PATH - 0 error(s), 11 warning(s)

->16:22:27 AU3Check ended.rc:1

>Running:(3.2.6.0):C:\Program Files\AutoIt3\autoit3.exe "SCRIPT_PATH"

SCRIPT_PATH (10) : ==> Variable used without being declared.:

$ZoomFactor = 1

^ ERROR

[Fossil Rock]

Check to see if you have all the includes.

[BrettF]

Check to see if you have all the includes.

Yes... I have them...

[RazerM]

This is very nice! Very fast as well

[Nahuel]

Haha, awesome! I love the effect it has when you move your mouse over the zoom window

[mattfaust]

ive tried a couple of these zoom scripts, and the image appears and follows the mouse but none of them zoom in.

im using the lastest builds, any idea what is wrong?

[RazerM]

@mattfaust

When the program starts, it is at 1x, press 2 or 3 to make it zoom.

[mattfaust]

i have , nothing happens

[Richard Robertson]

I'm curious, why by 3? Why not use a power of 2 like computers are based? 1, 2, 4, 8, etc.

Nice work though, it's fun to play with.

[Fossil Rock]

I'm curious, why by 3? Why not use a power of 2 like computers are based? 1, 2, 4, 8, etc.

Nice work though, it's fun to play with.

Reread the original post.

[JustinReno]

If you don't have a numberpad then it won't work unless you change the _IsPressed

[_Kurt]

This is very nice, no flashing lagging or skipping, very smooth and fast. Great Work.

Kurt

[Siao]

Nice.

Suggestion - I would use WinSetTrans on the GUI. This way magnifier would magnify what's "behind" the GUI (magnifying magnifier is only good for fun ). And if you set it transparent enough, the user could see behind the GUI too, which is handy,as the GUI wouldn't get in the way. Also it would look better, especially if you add WS_EX_TOOLWINDOW style... But maybe that's just personal preference, and GUI window getting in the way wouldn't be that big of an issue if your display is larger than my 15''

Also on further inspection noticed that there's a memory leak - DC handles aren't being released, because the parameters for ReleaseDC call are mixed up (window handle should come first, then DC handle).

Edited September 29, 2007 by Siao

[Achilles]

Nice, I like this! I made it 200 pixels bigger on each side so I could have more fun with the mouse over the window.