How to Call a function when ListView Row is clicked

[Nithyanandam]

Hi I have two List views H1 and H2.

When I make a selection in H1 the results in H2 should be automaticaly updated. i.e WE should be able to call a fucntion when H1 is clicked. Then that function will update the H2.

How Can we call a function when listview item is clicked?

Thanks

Sasikumar Nithyanandam

[Melba23]

Nithyanandam,

Use GUIRegisterMsg with the WM_NOTIFY message to capture a click in the H1 ListView - something like this:

Func MY_WM_NOTIFY($hWnd, $iMsg, $wParam, $lParam)
    #forceref $hWnd, $iMsg, $wParam
    Local $tNMHDR = DllStructCreate("int;int;int", $lParam)
    If @error Then Return
    If DllStructGetData($tNMHDR, 3) = $NM_DBLCLICK Then $fClick = True
    $tNMHDR = 0
    Return $GUI_RUNDEFMSG
EndFunc

Then when the $fClick flag is set, you can run your function to update the H2 ListView. Do not forget to reset the $fClick flag though. >_<

M23

[smashly]

Nithyanandam,

Use GUIRegisterMsg with the WM_NOTIFY message to capture a click in the H1 ListView - something like this:

Func MY_WM_NOTIFY($hWnd, $iMsg, $wParam, $lParam)
    #forceref $hWnd, $iMsg, $wParam
    Local $tNMHDR = DllStructCreate("int;int;int", $lParam)
    If @error Then Return
    If DllStructGetData($tNMHDR, 3) = $NM_DBLCLICK Then $fClick = True
    $tNMHDR = 0
    Return $GUI_RUNDEFMSG
EndFunc

Then when the $fClick flag is set, you can run your function to update the H2 ListView. Do not forget to reset the $fClick flag though. >_<

M23

Hi, almost but there's a couple of problems with your MY_WM_NOTIFY() function..

Your not trapping the msg to which control is double clicked..

DllStructGetData($tNMHDR, 1) = handle to control

For example if I had a Tab control with a ListView control on my Gui then $NM_DBLCLICK would fire on either control as your not checking which control is double clicked.

The "If @error Then Return" is not really needed

$tNMHDR = 0 isn't really needed even though it's good practice to clear a struct, but in this case the struct will be reset/cleared when entering/leaving the function

The tagNMHDR would be "hwnd;int_ptr;int" to make it compatible with 64bit and 32bit os

(I only discovered that recently while perusing the bugtrac)

Myself I would point the op to AutoIt help file -> User Defined Functions -> GuiListView Management -> _GUICtrlListView_Create() example to get an understanding of the WM_NOTIFY() function and how it works.

Edit: If the op had posted some brief partly working code I probably would have modded his code to show WM_NOTIFY()in action.

Cheers

Edited August 20, 2009 by smashly

[Melba23]

smashly,

Thank you for those clarifications. Always happy to learn. >_<

M23

[Nithyanandam]

Thanks guys... all you suggestions helped me a lot... thanks...