$LBS_NOTIFY?

[JetsterDajet]

Hello.

I really appreciate the community's help on the issues I've been having so far, thanks a lot guys.

I'm having an issue with listboxes again. I need some kind of trigger that I can use to start expressions when an item in the listbox is clicked on.

Now, I did find a little documentation on $LBS_NOTIFY, but I don't understand how it works and exactly what data it's sending where as a trigger.

Thanks in advance for your help.

[TerarinK]

Send the callback a message whenever the user clicks or double-clicks a string in the list box. It should also be noted that there are ranges of notification messages that individual controls can send to the Control Callback or Dialog Callback. However, many of these messages are suppressed unless the controls have been initially assigned a "notify" style.

Optional name of a Callback Function that receives all WM_COMMAND and WM_NOTIFY messages for the control. If a callback for the control is not designated, you must create a dialog Callback Function to process messages from your control.

[Melba23]

JetsterDajet,

I had real problems trying to get my ListView to tell me when it was clicked. I finally came up with the following:

expandcollapse popup

; Initialise "Click on ListView" function
GUIRegisterMsg($WM_NOTIFY, "MY_WM_NOTIFY")



; Create ListView
$hList_View = GUICtrlCreateListView(........, $GUI_SS_DEFAULT_LISTVIEW)



; Add this to the Main Loop
While 1
    
;...Code
    
; Check if ListView clicked
    Switch $iResult
        Case 1; Single click
        ;...Code
        Case 2; Double click
        ;...Code
    EndSwitch
    
;...Code
    
WEnd




; And here is the function
Func MY_WM_NOTIFY($hWnd, $Msg, $wParam, $lParam)
    
    Local $tagNMHDR, $vEvent
    Switch $wParam
        Case $hList_View
            $tagNMHDR = DllStructCreate("int;int;int", $lParam)
            If @error Then Return
            $vEvent = DllStructGetData($tagNMHDR, 3)
            Switch $vEvent
                Case $NM_CLICK
                    $iResult = 1
                Case $NM_DBLCLK
                    $iResult = 2
            EndSwitch
    EndSwitch
    $tagNMHDR = 0
    
EndFunc

The various sections obviously fit into the relevant sections of your code - it is not a working script!

Feel free to use/modify it if it is helpful. Do come back and ask if anything is unclear.

M23

[JetsterDajet]

JetsterDajet,

I had real problems trying to get my ListView to tell me when it was clicked. I finally came up with the following:

expandcollapse popup

; Initialise "Click on ListView" function
GUIRegisterMsg($WM_NOTIFY, "MY_WM_NOTIFY")



; Create ListView
$hList_View = GUICtrlCreateListView(........, $GUI_SS_DEFAULT_LISTVIEW)



; Add this to the Main Loop
While 1
    
;...Code
    
; Check if ListView clicked
    Switch $iResult
        Case 1; Single click
    ;...Code
        Case 2; Double click
    ;...Code
    EndSwitch
    
;...Code
    
WEnd




; And here is the function
Func MY_WM_NOTIFY($hWnd, $Msg, $wParam, $lParam)
    
    Local $tagNMHDR, $vEvent
    Switch $wParam
        Case $hList_View
            $tagNMHDR = DllStructCreate("int;int;int", $lParam)
            If @error Then Return
            $vEvent = DllStructGetData($tagNMHDR, 3)
            Switch $vEvent
                Case $NM_CLICK
                    $iResult = 1
                Case $NM_DBLCLK
                    $iResult = 2
            EndSwitch
    EndSwitch
    $tagNMHDR = 0
    
EndFunc

The various sections obviously fit into the relevant sections of your code - it is not a working script!

Feel free to use/modify it if it is helpful. Do come back and ask if anything is unclear.

M23

Thanks very much for pointing me in the right direction. I tried incorporating what you had there and it doesn't seem to be working, I must be doing something wrong. Here's a short test script. When I click on an item I should get a message box saying it worked.

expandcollapse popup

#include <GUIConstantsEx.au3>
#include <TabConstants.au3>
#include <ListboxConstants.au3>
#include <ComboConstants.au3>
#include<WindowsConstants.au3>




GUICreate("test script", 500, 500)
GUICtrlCreateLabel("test script", 135, 10)

GUIRegisterMsg($WM_NOTIFY, "MY_WM_NOTIFY")

$list1 = "item 1|item 2|item 3"
$tab = GUICtrlCreateTab(20, 40, 460, 430)
$listview = GUICtrlCreateList("", 50, 140, 400, 140, $GUI_SS_DEFAULT_LIST)
    GUICtrlSetLimit(-1, 200)
    GuiCtrlSetData(-1, $list1)
    GUISetState(@SW_SHOW)
    
Func MY_WM_NOTIFY($hWnd, $Msg, $wParam, $lParam)
    
    Local $tagNMHDR, $vEvent
    Switch $wParam
        Case $listview
            $tagNMHDR = DllStructCreate("int;int;int", $lParam)
            If @error Then Return
            $vEvent = DllStructGetData($tagNMHDR, 3)
            Switch $vEvent
                Case $NM_CLICK
                    $iResult = 1
                Case $NM_DBLCLK
                    $iResult = 2
            EndSwitch
    EndSwitch
    $tagNMHDR = 0
EndFunc


While 1
  $msg = GUIGetMsg()

  Select
      
    Switch $iResult
        Case 1
        MsgBox ( 1, "It", "works!" )
        Case 2
        MsgBox ( 1, "It", "works!" )
    EndSwitch

    Case $msg = $GUI_EVENT_CLOSE
      ExitLoop
  EndSelect
WEnd

[Melba23]

JetsterDajet,

Three problems with your script - and all are easy to solve:

1: You need to declare $iResult as Global so that when it is set in the function it is available in your loop.

2: Use ListView, not List - my example works with ListView, no idea what happen with List. :-)

3: Do not put the $iResult Switch inside the $msg Select

Next problem is nothing to do with you , but with the way Windows works. When you doubleclick. there is also a singleclick returned first. I have replaced the MsgBox calls with ConsoleWrite calls so that you can see (the doubleclick is overwritten by the MsgBox button click and so never shows with MsgBox calls!).

expandcollapse popup

#include <GUIConstantsEx.au3>
#include <TabConstants.au3>
#include <ListboxConstants.au3>
#include <ComboConstants.au3>
#include<WindowsConstants.au3>

GUICreate("test script", 500, 500)
GUICtrlCreateLabel("test script", 135, 10)

GUIRegisterMsg($WM_NOTIFY, "MY_WM_NOTIFY")

Global $iResult

$list1 = "item 1"
$tab = GUICtrlCreateTab(20, 40, 460, 430)
$listview = GUICtrlCreateListView("_|_|_", 50, 140, 400, 140, $GUI_SS_DEFAULT_LIST)
    GUICtrlSetLimit(-1, 200)
    GUICtrlCreateListViewItem($list1, $listview)
    GUISetState(@SW_SHOW)
    
Func MY_WM_NOTIFY($hWnd, $Msg, $wParam, $lParam)
    
    Local $tagNMHDR, $vEvent
    Switch $wParam
        Case $listview
            $tagNMHDR = DllStructCreate("int;int;int", $lParam)
            If @error Then Return
            $vEvent = DllStructGetData($tagNMHDR, 3)
            Switch $vEvent
                Case $NM_CLICK
                    $iResult = 1
                Case $NM_DBLCLK
                    $iResult = 2
            EndSwitch
    EndSwitch
    $tagNMHDR = 0
EndFunc

While 1
  $msg = GUIGetMsg()
  
  Switch $iResult
    Case 1
        ConsoleWrite("1" & @CRLF); MsgBox ( 1, "It", "works!" )
    Case 2
        ConsoleWrite("2" & @CRLF); MsgBox ( 1, "It", "works!" )
  EndSwitch
  $iResult = 0

  Select    
    Case $msg = $GUI_EVENT_CLOSE
      ExitLoop
  EndSelect
WEnd

In my own script, the singleclick merely selects the line and then the doubleclick does an action - so the singleclick is invisible. You will have to work out something - perhaps wait a bit if there is a singleclick and see if a doubleclick arrives very shortly afterwards.

Hope this helps,

M23

[JetsterDajet]

Ah, I see. Yes, that works. Is it possible to do this with list instead of listview? I can rework my GUI to use listview, but I'd rather keep it the way it is.

[Melba23]

JetsterDajet,

No idea. Why do you not try it and see? Please let us know the result.

M23