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How to restore previous value in an Input control

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I have a bunch of Input controls that should accept only digits or -1.

Here is a snippet from the GuiGetMsg() loop::

Case $inpIx11Min,$inpIx32Min, ....
    Local $oldVal = ???
    Local $val = GUICtrlRead($nMsg)
    If $val="-1" Or StringIsDigit($val) Then
        $nuVal = $val
        MsgBox(16,'Invalid index','Enter digit(s) or -1 for no logging of 1D arrays')

How can I get $oldVal?


CDebug Dumps values of variables including arrays and DLL structs, to a GUI, to the Console, and to the Clipboard


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#include <GUIConstants.au3>

Global $frmExample = GUICreate("", 100, 70)
Global $inpUserInput = GUICtrlCreateInput("", 10, 10, 80, 20)
Global $btnUserButton = GUICtrlCreateButton("Press Me", 10, 40, 80, 20)
Global $new_val = ""
Global $old_val = ""

GUISetState(@SW_SHOW, $frmExample)

While (True)
    Switch (GUIGetMsg())
        Case $GUI_EVENT_CLOSe
            Exit 0
        Case $btnUserButton
            $new_val = GUICtrlRead($inpUserInput)
            If (Not ($new_val = -1 or $new_val > 0)) Then
                GUICtrlSetData($inpUserInput, $old_val)
                MsgBox("", "", "Invalid number")
                $old_val = $new_val


Edited by InunoTaishou

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I'm going to assume that $oldVal is the last value that the input control contained? The only way to do that is to store the contents in the variable somewhere in your script so you can restore it later. Just be aware that where you put the variable assignment depends on how far back the restoration will go, so if you change the contents, you need to decide when you read the old value and when you read the new value.

If I posted any code, assume that code was written using the latest release version unless stated otherwise. Also, if it doesn't work on XP I can't help with that because I don't have access to XP, and I'm not going to.
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Back up and restore Windows user files _Array.au3 - Modified array functions that include support for 2D arrays.  -  ColorChooser - An add-on for SciTE that pops up a color dialog so you can select and paste a color code into a script.  -  Customizable Splashscreen GUI w/Progress Bar - Create a custom "splash screen" GUI with a progress bar and custom label.  -  _FileGetProperty - Retrieve the properties of a file  -  SciTE Toolbar - A toolbar demo for use with the SciTE editor  -  GUIRegisterMsg demo - Demo script to show how to use the Windows messages to interact with controls and your GUI.  -   Latin Square password generator

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Best to deal with the current content directly:

#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#include <EditConstants.au3>
#include <WinAPI.au3>

$hGUI = GUICreate("Test", 500, 500)

$cInput = GUICtrlCreateInput("",  10, 10, 200, 20)
GUICtrlSetLimit($cInput, 2)



While 1
    Switch GUIGetMsg()
        Case $GUI_EVENT_CLOSE

Func _WM_COMMAND($hWnd, $iMsg, $wParam, $lParam)

     ; If it was an update message from our input
    If _WinAPI_HiWord($wParam) = $EN_CHANGE And _WinAPI_LoWord($wParam) = $cInput Then

        ; Read the content
        $sContent = GUICtrlRead($cInput)
        ; If it contains anything other than -1 or 0-9
        If Not StringRegExp($sContent, "^(-1|[0-9])$") Then
            ; Replace those characters by spaces
            $sContent = StringRegExpReplace($sContent, "[^-0-9]", "")
            ; If there is a unuary minus
            If StringLeft($sContent, 1) = "-" Then
                ; Remove digit (-1 would have matched above)
                $sContent = "-"
                ; If not then max 1 digit allowed
                $sContent = StringLeft($sContent, 1)
            ; Reset the content
            GUICtrlSetData($cInput, $sContent)



If you are not used to dealing with Windows messages, I recommend the GUIRegisterMsg tutorial in the Wiki as a starting point. Please ask if you still have any further questions after having read the tutorial.



Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind._______My UDFs:


ArrayMultiColSort ---- Sort arrays on multiple columns
ChooseFileFolder ---- Single and multiple selections from specified path treeview listing
Date_Time_Convert -- Easily convert date/time formats, including the language used
ExtMsgBox --------- A highly customisable replacement for MsgBox
GUIExtender -------- Extend and retract multiple sections within a GUI
GUIFrame ---------- Subdivide GUIs into many adjustable frames
GUIListViewEx ------- Insert, delete, move, drag, sort, edit and colour ListView items
GUITreeViewEx ------ Check/clear parent and child checkboxes in a TreeView
Marquee ----------- Scrolling tickertape GUIs
NoFocusLines ------- Remove the dotted focus lines from buttons, sliders, radios and checkboxes
Notify ------------- Small notifications on the edge of the display
Scrollbars ----------Automatically sized scrollbars with a single command
StringSize ---------- Automatically size controls to fit text
Toast -------------- Small GUIs which pop out of the notification area


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Thnak you all -- especially M23


CDebug Dumps values of variables including arrays and DLL structs, to a GUI, to the Console, and to the Clipboard


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