control lost from parent windows

[twelo 0]

hi i have a parent gui & child gui both working fine but when i close child window and return to parent windows

no controls works on parent windows

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#include <GUIConstants.au3>
#include <WindowsConstants.au3>
#include <GuiConstantsEx.au3>
#include <StaticConstants.au3>
#include <ButtonConstants.au3>
#include <GuiMenu.au3>

$PARENT = GUICreate("PARENT", 300, 300, -1, -1)
$File = GUICtrlCreateMenu("File")
$2ndGUI = GUICtrlCreateMenuItem("Child Win", $File)
$About = GUICtrlCreateMenuItem("About", $File)
$Button1 = GUICtrlCreateButton("BUTTON 1", 100, 125, 100, 50, $WS_GROUP)
GUISetState(@SW_SHOW)


While 1
    $nMsg = GUIGetMsg()
    Select
    Case $nMsg = $GUI_EVENT_CLOSE
        Exit
    Case $nMsg = $About
        MsgBox(8192, "about", "Parent Child Windows")
    Case $nMsg = $Button1
        MsgBox(8192, "1st Msg", "hello this is parent window")
    Case $nMsg = $2ndGUI
        Opt("GUIOnEventMode", 1)
        $CHILD = GUICreate("CHILD", 200, 200)
        GUISetOnEvent($GUI_EVENT_CLOSE, "CLOSEClicked")
        $Button2 = GUICtrlCreateButton("BUTTON 2", 50, 100, 100, 50, $WS_GROUP)
        GUICtrlSetOnEvent($Button2, "OKButton")

        GUISetState(@SW_SHOW)

        While 1
        Sleep(1000)
        WEnd

    EndSelect
WEnd

Func OKButton()
  MsgBox(8192, "2nd Msg", "hello this is child window")
EndFunc

Func CLOSEClicked()
    GUIDelete($CHILD)
    GUISwitch($PARENT)
EndFunc

it is necessary for me to put GUISetOnEvent in child windows

i tried with

Opt("GUISetOnEvent", 0)

GUISwitch

Return

in CLOSEClicked() function but none works

CLOSEClicked() is not in loop so i can not use exitloop

[Melba23 2,773]

twelo,

2 things wrong with that code which prevent the parent regaining control:

1. You never leave the Child While...WEnd loop as you have no way of breaking out of it. Using Opt("TrayIconDebug", 1) would have made that obvious - go read about it in the Help file.

2. You set OnEvent mode for the Child GUI, but never reset MessageLoop mode. So even if the code had handed control back to the Parent, your GUIGetMsg call would always have produced 0 (Details in the Help file under <GUI Reference> ). Changing GUI modes in a single script is something to be vary wary of - you can easily end up in the wrong mode at the wrong time.

If you fix those 2 problems, the code works as it should:

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#include <GUIConstants.au3>
#include <WindowsConstants.au3>
#include <GuiConstantsEx.au3>
#include <StaticConstants.au3>
#include <ButtonConstants.au3>
#include <GuiMenu.au3>

$PARENT = GUICreate("PARENT", 300, 300, -1, -1)
$File = GUICtrlCreateMenu("File")
$2ndGUI = GUICtrlCreateMenuItem("Child Win", $File)
$About = GUICtrlCreateMenuItem("About", $File)
$Button1 = GUICtrlCreateButton("BUTTON 1", 100, 125, 100, 50, $WS_GROUP)
GUISetState(@SW_SHOW)

While 1
    $nMsg = GUIGetMsg()
    if $nMsg <> 0 Then ConsoleWrite($nMsg & @CRLF)
    Select
        Case $nMsg = $GUI_EVENT_CLOSE
            Exit
        Case $nMsg = $About
            MsgBox(8192, "about", "Parent Child Windows")
        Case $nMsg = $Button1
            MsgBox(8192, "1st Msg", "hello this is parent window")
        Case $nMsg = $2ndGUI
            Opt("GUIOnEventMode", 1)

            $CHILD = GUICreate("CHILD", 200, 200)
            GUISetOnEvent($GUI_EVENT_CLOSE, "CLOSEClicked")
            $Button2 = GUICtrlCreateButton("BUTTON 2", 50, 100, 100, 50, $WS_GROUP)
            GUICtrlSetOnEvent($Button2, "OKButton")

            GUISetState(@SW_SHOW)

            While WinExists("CHILD") ; <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
                Sleep(10)
            WEnd

    EndSelect
WEnd

Func OKButton()
    MsgBox(8192, "2nd Msg", "hello this is child window")
EndFunc   ;==>OKButton

Func CLOSEClicked()
    GUIDelete($CHILD)
    GUISwitch($PARENT)
    Opt("GUIOnEventMode", 0) ; <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
EndFunc   ;==>CLOSEClicked

I added the <<<<<<<<<<<<<<<<< lines. I hope that everything is clear.

M23

[twelo 0]

i was trying to overcome it from 2 days

now this line works & thanks

While WinExists("CHILD") i m using While WinExists($CHILD) i hope no problem with it.

if $nMsg <> 0 Then ConsoleWrite($nMsg & @CRLF) after removing this line, script also works fine, i think it was only for debug info (i only removed it coz it always write something in console)

[Melba23 2,773]

twelo,

You are correct on both counts.

M23