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Artisan

Input control and WM_COMMAND [SOLVED]

4 posts in this topic

#1 ·  Posted (edited)

Hi all,

I've been studying WM_NOTIFY and WM_COMMAND for a hobby project I'm working on. At this point, I'm trying to capture the WM_COMMAND event that happens when the focus is on the Input control and the user presses the ENTER key. I know I could do this via _IsPressed(), but I'd really rather do everything from within WM_COMMAND and WM_NOTIFY. It just seems like better coding practice. Anyway, this is probably simpler than I think it is, but I'm really stuck.

I made a script that outputs WM_NOTIFY and WM_COMMAND events to the console as they happen. Here's my problem. When I press ENTER while the focus is on the Input control, this is the output I get:

==========================================================
Event: WM_COMMAND (unknown)
$hWnd: 0x00050408
$iMsg: 273 $WM_COMMAND: 273
$iwParam: 0x00000001 $iIDFrom: 1 $iCode: 0
$ilParam: 0x00000000
11:45:42:740
==========================================================

It looks like a command is coming from nowhere ($ilParam = 0) and doing nothing. Can anyone help me understand this? I've been all over the AutoIt Forums and MSDN and I'm still not understanding. I was expecting to see a key code for the ENTER key somewhere, or some kind of message like $WM_INPUT_CONFIRM or something.

Here's the script I wrote to get the output:

Global Const $tagNMHDR = "struct;hwnd hWndFrom;uint_ptr IDFrom;INT Code;endstruct", _
$WM_COMMAND = 0x0111, _
$WM_NOTIFY = 0x004E, _
$GUI_EVENT_CLOSE = -3, _
$GUI_RUNDEFMSG = 'GUI_RUNDEFMSG'

Global $gui = GUICreate("ComboBox Listener", 300, 300)
Global $combo = GUICtrlCreateCombo("", 10, 10)
GUICtrlSetData(-1, "Item 1|Item 2|Item 3|Item 4|Item 5|Item 6")
Global $input = GUICtrlCreateInput("", 10, 100)
Global $button = GUICtrlCreateButton("Test", 10, 200)
GUISetState(@SW_SHOW)
GUIRegisterMsg($WM_NOTIFY, "WM_NOTIFY")
GUIRegisterMsg($WM_COMMAND, "WM_COMMAND")

Do
Until GUIGetMsg() == $GUI_EVENT_CLOSE

Func WM_NOTIFY($hWnd, $iMsg, $wParam, $lParam)
#forceref $hWnd, $iMsg, $wParam
Local $hWndFrom, $iIDFrom, $iCode, $tNMHDR
$tNMHDR = DllStructCreate($tagNMHDR, $lParam)
$hWndFrom = HWnd(DllStructGetData($tNMHDR, "hWndFrom"))
$iCode = DllStructGetData($tNMHDR, "Code")

Switch $hWndFrom
Case GUICtrlGetHandle($combo)
WM_Output("WM_NOTIFY", $iCode, "Combo")
Case GUICtrlGetHandle($input)
WM_Output("WM_NOTIFY", $iCode, "Input")
Case GUICtrlGetHandle($button)
WM_Output("WM_NOTIFY", $iCode, "Button")
Case $gui
WM_Output("WM_NOTIFY", $iCode, "GUI")
Case Else
WM_Output("WM_NOTIFY", $iCode, $hWndFrom)
EndSwitch
Return $GUI_RUNDEFMSG
EndFunc

Func WM_COMMAND($hWnd, $iMsg, $iwParam, $ilParam)
#forceref $hWnd, $iMsg
Local $hWndFrom, $iIDFrom, $iCode
$hWndFrom = $ilParam
$iIDFrom = BitAND($iwParam, 0xFFFF)
$iCode = BitShift($iwParam, 16)
Switch $hWndFrom
Case GUICtrlGetHandle($combo)
WM_Output("WM_COMMAND", $iCode, "Combo")
Case GUICtrlGetHandle($input)
WM_Output("WM_COMMAND", $iCode, "Input")
Case GUICtrlGetHandle($button)
WM_Output("WM_COMMAND", $iCode, "Button")
Case $gui
WM_Output("WM_COMMAND", $iCode, "GUI")
Case Else
ConsoleWrite("==========================================================" & @LF)
ConsoleWrite("Event: WM_COMMAND (unknown)" & @LF)
ConsoleWrite("$hWnd: " & $hWnd & @LF)
ConsoleWrite("$iMsg: " & $iMsg & @TAB & "$WM_COMMAND: " & $WM_COMMAND & @LF)
ConsoleWrite("$iwParam: " & $iwParam & @TAB & "$iIDFrom: " & $iIDFrom & @TAB & "$iCode: " & $iCode & @LF)
ConsoleWrite("$ilParam: " & $ilParam & @LF)
ConsoleWrite(@HOUR & ':' & @MIN & ':' & @SEC & ':' & @MSEC & @LF)
ConsoleWrite("==========================================================" & @LF & @LF)
EndSwitch
Return $GUI_RUNDEFMSG
EndFunc

Func WM_Output( $Event, $iCode, $Control )
ConsoleWrite("==========================================================" & @LF)
ConsoleWrite("Event: " & $Event & @LF)
ConsoleWrite("$iCode: " & $iCode & @LF)
ConsoleWrite("Control: " & $Control & @LF)
ConsoleWrite(@HOUR & ':' & @MIN & ':' & @SEC & ':' & @MSEC & @LF)
ConsoleWrite("==========================================================" & @LF & @LF)
EndFunc
Edited by Artisan

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You can use it just like this:

$GUI_EVENT_CLOSE = -3

Global $gui = GUICreate("ComboBox Listener", 300, 300)
Global $combo = GUICtrlCreateCombo("", 10, 10)
GUICtrlSetData(-1, "Item 1|Item 2|Item 3|Item 4|Item 5|Item 6")
Global $input = GUICtrlCreateInput("", 10, 100)
Global $button = GUICtrlCreateButton("Test", 10, 200)
GUISetState(@SW_SHOW)

While 1
    $msg = GUIGetMsg()
    If $msg = $GUI_EVENT_CLOSE Then ExitLoop
    If $msg = $input Then ConsoleWrite('Event from input control, value: ' & GUICtrlRead($input) & @CRLF)
WEnd

But this event is fired also when you change focus from input control to other control (and only when Enter is pressed on focused input control).

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You may look here at example of WM_COMMAND for input control

Thanks. I've already got a decent handle on WM_COMMAND, so this wasn't quite what I was looking for. (I just wanted to know when the user finished inputting.)

You can use it just like this:

$GUI_EVENT_CLOSE = -3

Global $gui = GUICreate("ComboBox Listener", 300, 300)
Global $combo = GUICtrlCreateCombo("", 10, 10)
GUICtrlSetData(-1, "Item 1|Item 2|Item 3|Item 4|Item 5|Item 6")
Global $input = GUICtrlCreateInput("", 10, 100)
Global $button = GUICtrlCreateButton("Test", 10, 200)
GUISetState(@SW_SHOW)

While 1
$msg = GUIGetMsg()
If $msg = $GUI_EVENT_CLOSE Then ExitLoop
If $msg = $input Then ConsoleWrite('Event from input control, value: ' & GUICtrlRead($input) & @CRLF)
WEnd

But this event is fired also when you change focus from input control to other control (and only when Enter is pressed on focused input control).

That's PERFECT! ALso, *facepalm* for not thinking to try that myself. That's exactly what I needed.

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