OpenEuphoria

Re: Win32Lib ListView + setUserProperty query

• Posted by Dave Probert <zingo at purpletiger.com> Jul 12, 2005
• 488 views

Derek Parnell wrote:
> 
> Dave Probert wrote:
> 
> [snip]
> 
> > Sorry but the full code is waaaay to big to post here, but 
> > here's the lines that fill the listview:
> > 
> > -- loclv is the ListView
> > -- data is a sequence of values for a row
> > -- ids is a matching sequence containing the DB row id's
> > 
> > 	eraseItems(loclv)
> > 	tmph = 0
> > 	for i=length(data) to 1 by -1 do
> > 		id = addLVItem(loclv,tmph,data[i])	-- add row at a time
> > 		if i<= length(ids) then
> > 			setUserProperty(id,"identifier",ids[i])
> > 		end if
> > 	end for
> > 
> 
> The 'id' in the setUserProperty() call is meant to be a CONTROL and not the
> value returned
> by addLVItem(). It is designed to add a property to a control. Another method
> you might
> like to look at instead is ...
> 
> }}}
<eucode>

-- loop through current LVITEM ids and remove the associated UserProperties
here

>  	eraseItems(loclv)
>  	tmph = 0
>  	for i=length(data) to 1 by -1 do
>  		id = addLVItem(loclv,tmph,data[i])	-- add row at a time
>  		if i<= length(ids) then                  
>  			setUserProperty(loclv,id&"identifier",ids[i])
>  		end if
>  	end for
> </eucode>
{{{


Ah, thanks - that makes more sense.  I kinda get confused with the Control
(handles) and Indexes,etc that are returned by the various functions associated
with Listviews, Treeviews and Droplists.

I guess that it would be sensible to insert a routine to remove the old
UserProperties just before the eraseItems() so that the userProps internal list
doesn't fill up with junk.

> 
> And then to retrieve the hidden data for a particular id ...
> 
> }}}
<eucode>
>     sequence temp
>     sequence hidden
>     temp = getUserProperty(loclv, id&"identifier")
>     if length(temp) > 0 then
>         hidden = temp[1]
>     else 
>          hidden = {}
>     end if
> </eucode>
{{{

> 

Thanks again Derek.  I guess I'd better go back through all my old code and fix
it ;)

Cheers,
Dave

. .. : :: = == == = :: : .. .
Server-Side DB driven web sites,
Software Development
(and part-time games developer)

contact dave_p at purpletiger dot com
or probert.dave at gmail dot com
. .. : :: = == == = :: : .. .