[Gambas-user] Gridview multiple select... how to read each selected row?

[Stephen Bungay]

   Replying to my own emails... worse than talking to yourself...
I forgot to thank Benoit for the info.
   Many thanks to Benoit for pointing out that 'rows' does indeed have a 
'selected' property. Dunno how I missed finding it, but I did.

Stephen Bungay wrote:
>    New info. There IS a way to check the state of the row, I didn't see 
> it and it is not (yet) documented but hopefully it soon will be.
> 
> Gridview1.rows[X].selected
> 
>    There... that's MUCH better and no more fussing about with the 
> collection. Something like the example below should work rather nicely...
> 
> For X = 1 to GridView1.rows.count
>      if GridView1.rows[X].selected then
>         ' insert processing logic here
>      end if
> Next
> 
> 
> Steve.
> 
> 
> Lee McPherson wrote:
>> Thanks Stephen and Benoit,
>>
>> I understand Stephen's suggestion, but it seems to only work with using the
>> CTRL key clicking each row with a mouse.  Now if you were to do the same
>> capture (under gridview_select event) by VERY quickly dragging the mouse
>> over several rows at time, I can actually get it to skip capturing some of
>> the rows!  My project will be using an LCD touch screen, so the user will
>> only be able to "drag select" and not point and click each row, so his
>> suggestion might not work for me.  I say "might" because I might be doing
>> something wrong.  Here is some code to replicate what I did.  (with an
>> gridview object called Gridview1, and a button to print the collection
>> called Button1)  I ended up using the MouseDown event on gridview1 to clear
>> the collection since I'm only worried about mouse drags to select multiple
>> events.
>>
>> PUBLIC rowsel AS COLLECTION
>>
>> PUBLIC SUB gridview1_Select()
>>   DIM rownumber AS String
>>   IF gridsel.Exist(gridView1.row)
>>     gridsel.Remove(gridView1.row)
>>   ELSE
>>     gridsel.Add(gridView1.row, gridView1.row)
>>   ENDIF
>> END
>>
>> PUBLIC SUB gridView1_MouseDown()
>>   gridsel.Clear
>> END
>>
>> PUBLIC SUB Button9_Click()
>>   DIM rownumber AS String
>>   FOR EACH rownumber IN gridsel
>>     PRINT "R: " & rownumber
>>   NEXT
>> END
>>
>>
>> On Mon, Apr 14, 2008 at 8:13 PM, Benoit Minisini <
>> gambas at ...1...> wrote:
>>
>>> On lundi 14 avril 2008, Stephen Bungay wrote:
>>>> Hi Lee;
>>>>     I never did understand why the grid control would allow you to
>>>> select multiple items and not have a mechanism to indicate which rows
>>>> were selected and which were not. Perhaps it does have such a mechanism
>>>> but I haven't been able to find it. Of course it could be deeply buried
>>>> but then thats a bad thing too.
>>>>    Anyway, what you can probably do is create a collection that holds
>>>> each selected item's row number, use the row number as the index into
>>>> the collection. Each time the select event is raised by the control,
>>>> trap it and store the row that was clicked on in the collection. If you
>>>> get an error when trying to add the row number to the collection because
>>>> the index key already exists then you know the row was already stored
>>>> and the user has clicked on a row to deselected it. Remove that row from
>>>> the collection, thus keeping the information in the collection in sync
>>>> with the selected rows in the grid.
>>>>    IMHO this is a kludge to accommodate the grid control which should
>>>> have a mechanism that exposes the selected state of it's row items to
>>>> the programmer.
>>>>
>>>> Steve.
>>>>
>>> At the moment, you have to test the Selected property of each row to get
>>> the
>>> selection.
>>>
>>> I admit that the process is not optimal! Maybe I should add a Selection
>>> property that would return the indexes of all selected rows?
>>>
>>> --
>>> Benoit Minisini
>>>
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