Let user indicate a point on the screen

[disfated]

Hi everybody. Find nothing in help or forum search about what I would like to do:

I need function that ask user to indicate a point on the screen. It simply waits till user clicks somewhere on the screen and then returns the coordinates of the point clicked by the user.

If my description is clear and you have any ideas how it can be done, please help me

PS. Don't sugest to input coordinates from keyboard.

[Melba23]

disfated,

Try a combination of MouseGetPos and _IsPressed in a While...WEnd loop.

I am surprised you did not run across the first of those in your search through the Help file.

M23

[disfated]

Great! _IsPressed!

Searched for WaitPress, WaitClick, WaitKey ... all about wait.

Now I know what to do. Thanks again!

[wolf9228]

Hi everybody. Find nothing in help or forum search about what I would like to do:

I need function that ask user to indicate a point on the screen. It simply waits till user clicks somewhere on the screen and then returns the coordinates of the point clicked by the user.

If my description is clear and you have any ideas how it can be done, please help me

PS. Don't sugest to input coordinates from keyboard.

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#include <WinAPI.au3>
#include <WindowsConstants.au3>
#include <StructureConstants.au3>
HotKeySet("{ESC}", "Terminate")

OnAutoItExitRegister("Cleanup")
Const $tagMSLLHOOKSTRUCT = "int x;int y;DWORD mouseData;" & _
"DWORD flags;DWORD time;ULONG_PTR dwExtraInfo"
Global $MouseHook , $MSLLHOOKSTRUCT , $MouseProc , $MouseHook , $PosArray[4]
Global $hmod = _WinAPI_GetModuleHandle(0) , $Test = False

RegistrationPointGuessing(0,0,@DesktopWidth,@DesktopHeight)

While 1
if $Test = True Then
MsgBox(0,"Msg","right Guess")
$Test = False
EndIf
WEnd

Func RegistrationPointGuessing($L,$T,$W,$H)
if Not ($MouseHook) Then
$MSLLHOOKSTRUCT = DllStructCreate($tagMSLLHOOKSTRUCT)
$MouseProc = DllCallbackRegister("LowLevelMouseProc", "long", "int;wparam;lparam")
$MouseHook = _WinAPI_SetWindowsHookEx($WH_MOUSE_LL,DllCallbackGetPtr($MouseProc),$hmod)
EndIf
$PosArray[0] = $L
$PosArray[1] = $T
$PosArray[2] = $W
$PosArray[3] = $H
EndFunc

;http://msdn.microsoft.com/en-us/library/ms644986%28v=vs.85%29.aspx
Func LowLevelMouseProc($nCode,$wParam,$lParam)
If $nCode < 0 Then _
Return _WinAPI_CallNextHookEx($MouseHook, $nCode, $wParam, $lParam)

$L = $PosArray[0]
$T = $PosArray[1]
$W = $PosArray[2]
$H = $PosArray[3]

$x = DllStructGetData($MSLLHOOKSTRUCT,1)
$y = DllStructGetData($MSLLHOOKSTRUCT,2)
$mouseData = DllStructGetData($MSLLHOOKSTRUCT,3)
$flags = DllStructGetData($MSLLHOOKSTRUCT,4)
$time = DllStructGetData($MSLLHOOKSTRUCT,5)
$dwExtraInfo = DllStructGetData($MSLLHOOKSTRUCT,6)

Switch $wParam
Case $WM_LBUTTONDOWN
Case $WM_LBUTTONUP
if ($x >= $L And $x <= ($L + $W) And  $y >= $T And $y <= ($T + $H)) Then $Test = True
Case $WM_MOUSEMOVE
Case $WM_MOUSEWHEEL
Case $WM_MOUSEHWHEEL
Case $WM_RBUTTONDOWN
Case $WM_RBUTTONUP
EndSwitch

Return _WinAPI_CallNextHookEx($MouseHook, $nCode, $wParam, $lParam)
EndFunc


Func Cleanup()
_WinAPI_UnhookWindowsHookEx($MouseHook)
DllCallbackFree($MouseProc)
EndFunc

Func Terminate()
    Exit 0
EndFunc

[disfated]

wolf9228, thanks for your sample. it really helped me to do exactly what I need. Also used KeyboardHook to toggle mouse capturing by pressing Shift and some other key press proccessings.

btw, there's mistake in your sample - $MSLLHOOKSTRUCT must be created inside LowLevelMouseProc() on the basis of $lParam, not in RegistrationPointGuessing().

Here what I've got. Maybe it will be useful for someone...

expandcollapse popup

#include <WinAPI.au3>
#include <WindowsConstants.au3>
#include <StructureConstants.au3>

HotKeySet("{ESCAPE}", "Terminate")
OnAutoItExitRegister("Cleanup")

Global Const $tagMSLLHOOKSTRUCT = 'int x;int y;DWORD mouseData;DWORD flags;DWORD time;ULONG_PTR dwExtraInfo'

Global $hModule = _WinAPI_GetModuleHandle(0)

Global $hMouseProc = DllCallbackRegister("LowLevelMouseProc", "long", "int;wparam;lparam")
Global $pMouseProc = DllCallbackGetPtr($hMouseProc)
Global $hMouseHook = _WinAPI_SetWindowsHookEx($WH_MOUSE_LL, $pMouseProc, $hModule)

Global $hKeyboardProc = DllCallbackRegister("LowLevelKeyboardProc", "long", "int;wparam;lparam")
Global $pKeyboardProc = DllCallbackGetPtr($hKeyboardProc)
Global $hKeyboardHook = _WinAPI_SetWindowsHookEx($WH_KEYBOARD_LL, $pKeyboardProc, $hModule)

Global $enable = False

While 1
WEnd

; http://msdn.microsoft.com/en-us/library/ms644986(v=vs.85).aspx
Func LowLevelMouseProc($nCode, $wParam, $lParam)
    
    If $nCode >= 0 And $wParam = $WM_LBUTTONUP Then
        
        If $enable Then
            ; http://msdn.microsoft.com/en-us/library/ms644970(v=vs.85).aspx
            Local $MSLLHOOKSTRUCT = DllStructCreate($tagMSLLHOOKSTRUCT, $lParam)
            Local $x = DllStructGetData($MSLLHOOKSTRUCT, 1)
            Local $y = DllStructGetData($MSLLHOOKSTRUCT, 2)
            ConsoleWrite('Click at (' & $x & ', ' & $y & ')' & @CRLF)
        EndIf
        
    EndIf

    Return _WinAPI_CallNextHookEx($hMouseHook, $nCode, $wParam, $lParam)
    
EndFunc

; http://msdn.microsoft.com/en-us/library/ms644985(VS.85).aspx
Func LowLevelKeyboardProc($nCode, $wParam, $lParam)
    
    If $nCode >= 0 Then
        
        ; http://msdn.microsoft.com/en-us/library/ms644967(v=VS.85).aspx
        Local $KBDLLHOOKSTRUCT = DllStructCreate($tagMSLLHOOKSTRUCT, $lParam)
        ; http://msdn.microsoft.com/en-us/library/dd375731(v=VS.85).aspx
        Local $vkCode = DllStructGetData($KBDLLHOOKSTRUCT, 1)
        If $vkCode = 0x10 Or $vkCode = 0xA0 or $vkCode = 0xA1 Then ; Shifts
            Switch $wParam
            Case $WM_KEYDOWN
                ConsoleWrite('Enable click capture' & @CRLF)
                $enable = True
            Case $WM_KEYUP
                ConsoleWrite('Disable click capture' & @CRLF)
                $enable = False
            EndSwitch
        ElseIf $wParam = $WM_KEYUP And ($vkCode >= 0x30) And ($vkCode <= 0x39) Then  ; 0 - 9
            ConsoleWrite('Sector set: ' & ($vkCode - 0x30) & @CRLF)
        ElseIf $wParam = $WM_KEYUP And ($vkCode >= 0x60) And ($vkCode <= 0x69) Then  ; NumPad 0 - NumPad 9
            ConsoleWrite('Sector set: ' & ($vkCode - 0x60) & @CRLF)
        EndIf
        
    EndIf

    Return _WinAPI_CallNextHookEx($hMouseHook, $nCode, $wParam, $lParam)
    
EndFunc

Func Cleanup()
    _WinAPI_UnhookWindowsHookEx($hMouseHook)
    _WinAPI_UnhookWindowsHookEx($hKeyboardHook)
    DllCallbackFree($hMouseProc)
    DllCallbackFree($hKeyboardProc)
EndFunc

Func Terminate()
    Exit 0
EndFunc

Edited February 17, 2011 by disfated