OpenEuphoria

Re: [Win32lib] Listview speed

• Posted by Derek Parnell <ddparnell at bigpond.com> Jun 15, 2002
• 393 views

Euman,
I've added a way to the library so that an application can easily handle
WM_NOTIFY messages, such as the LVM_COLUMNCLICK one you have exampled here.
This way, it gets over the problem of having to declare shared data before
the include win32lib.ew statement. This feature will be released on Sunday
night, along with some demo programs for it.

----- Original Message -----
From: <euman at bellsouth.net>
To: "EUforum" <EUforum at topica.com>
Subject: Re: [Win32lib] Listview speed


>
> Hey Derek,
>
> Ive modified Win32lib's ColumnClick Notification to use loadLVInfo( ),
> theres only one problem I see with this.
>
> You must declare your alldata sequence ahead of including Win32lib.ew
> Im not sure if I'll even try to work this out until later next week.
>
> The good news is that for 1500+ items it seems to take (visually) about
the
> same time as it would to normally load your LV.
> This is pretty fast, folks!
>
> Here's what Ive done thus far:
>
> global integer SORT_BY
> SORT_BY=0
>
> global function CS_byElement(sequence s1,sequence s2)
>     return compare(s1[SORT_BY],s2[SORT_BY])
> end function
>
> global constant ByElement=routine_id("CS_byElement")
>
> ----------------------------------------------------
> function fDoLVN_COLUMNCLICK(integer id, atom hWnd, atom wParam, atom
lParam)
> ----------------------------------------------------
> integer
>     lColumn,
>     lOwner
>
>     id = getId( fetch( lParam, NMHDR_hwndFrom ))
>     if id != 0 then
>         lColumn = fetch( lParam, NMLISTVIEW_iSubItem ) + 1
>         SORT_BY=lColumn
>         alldata=custom_sort(ByElement,alldata)
>         VOID = sendMessage(id,WM_SETREDRAW,0,0)
>         loadLVInfo(id, alldata)
>         VOID = sendMessage(id,WM_SETREDRAW,1,0)
>     end if
>
>     return {kReturnNow}
> end function
>
>
> Euman
> euman at bellsouth.net
>
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