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Posted to users@flex.apache.org by Lucas Junqueira / Ciclope <lu...@ciclope.art.br> on 2013/03/12 22:19:27 UTC
help with moving list elements up and down
Hi, I was trying to create an order list withe the spark list control. I
would like to move itens up and down, but this seems to be a problem. Here
is the code I'm trying to use to move an item up. Can anyone tell me why it
isn't working? The item label is, indeed, changed, but the list selection
not (the selected index does not change):
if (this.sequenceList.selectedIndex > 0) {
var list1:Object = new Object();
var list2:Object = new Object();
list1.label =
String(this.sequenceListData.getItemAt(this.sequenceList.selectedIndex -
1).label);
list1.data =
String(this.sequenceListData.getItemAt(this.sequenceList.selectedIndex -
1).data);
list2.label =
String(this.sequenceListData.getItemAt(this.sequenceList.selectedIndex).label);
list2.data =
String(this.sequenceListData.getItemAt(this.sequenceList.selectedIndex).data);
this.sequenceListData.getItemAt(this.sequenceList.selectedIndex -
1).label = list2.label;
this.sequenceListData.getItemAt(this.sequenceList.selectedIndex -
1).data = list2.data;
this.sequenceListData.getItemAt(this.sequenceList.selectedIndex).label
= list1.label;
this.sequenceListData.getItemAt(this.sequenceList.selectedIndex).data =
list1.data;
// the following does not work
this.sequenceList.selectedIndex = this.sequenceList.selectedIndex - 1;
// tryied with and without the refresh
this.sequenceListData.refresh();
}
Thank you all!
--
Lucas Junqueira
lucas@ciclope.art.br / (31)2555-0635 / (31)9133-6635
Ateliê Ciclope de arte e publicação digital
RE: help with moving list elements up and down
Posted by Steve Lawdis <SL...@anaheim.net>.
Have you tried modifying the array/array collection that the list component is using for the dataProvider property?
So you would move and item up or down using a button on the UI and that button's click handler would look similar to this:
That btnMoveUp_clickHandler might look like:
private function btnMoveUp_clickHandler:void
{
var index:Number = list.selectedIndices[0];
//temp array for reassembling your data for the list
var newArray:Array = new Array();
for (var i:Number=0; i < test2.length; i++)
{ {
//item to move down
if (i == index - 1)
{
//Push the item to move up first
newArray.push(listDataProviderArray[index]);
//Push the item to move down next
newArray.push(listDataProviderArray[index - 1]);
}
//item to move up
else if (i == index)
{
//Do nothing, wait for next pass to add items again otherwise you risk duplicating data
}
else
{
newArray.push(listDataProviderArray [i]);
}
}
listDataProviderArray = newArray;
validateNow();
}
You will need to double check this code and make corrections and make sure the listDataProviderArray is [Bindable] so any changes to it's structure are reflected back to the list control.
Steve Lawdis
-----Original Message-----
From: Lucas Junqueira / Ciclope [mailto:lucas@ciclope.art.br]
Sent: Wednesday, March 13, 2013 4:49 AM
To: users@flex.apache.org
Subject: Re: help with moving list elements up and down
Nope... nor validateNow or setting the item, instead of the index worked...
2013/3/13 Evyatar Ben Halevi-Arbib <ev...@gmail.com>
> I suggest using the selectedItem property instead of selectedIndex.
> I witnessed cases where changing the selectedIndex had no impact on
> the UI and using selectedItem did work properly.
>
> Good luck,
> Evyatar
>
> On Tue, Mar 12, 2013 at 11:29 PM, Alex Harui <ah...@adobe.com> wrote:
>
> > Try calling validateNow after changing selectedIndex.
> >
> >
> > On 3/12/13 2:19 PM, "Lucas Junqueira / Ciclope"
> > <lu...@ciclope.art.br>
> > wrote:
> >
> > > Hi, I was trying to create an order list withe the spark list control.
> I
> > > would like to move itens up and down, but this seems to be a problem.
> > Here
> > > is the code I'm trying to use to move an item up. Can anyone tell
> > > me
> why
> > it
> > > isn't working? The item label is, indeed, changed, but the list
> selection
> > > not (the selected index does not change):
> > >
> > > if (this.sequenceList.selectedIndex > 0) {
> > > var list1:Object = new Object();
> > > var list2:Object = new Object();
> > > list1.label =
> > > String(this.sequenceListData.getItemAt(this.sequenceList.selectedI
> > > ndex
> -
> > > 1).label);
> > > list1.data =
> > > String(this.sequenceListData.getItemAt(this.sequenceList.selectedI
> > > ndex
> -
> > > 1).data);
> > > list2.label =
> > >
> >
> >
> String(this.sequenceListData.getItemAt(this.sequenceList.selectedIndex
> ).label)>
> > ;
> > > list2.data =
> > >
> >
> String(this.sequenceListData.getItemAt(this.sequenceList.selectedIndex
> ).data);
> > >
> > > this.sequenceListData.getItemAt(this.sequenceList.selectedIndex - 1).label = list2.label;
> > >
> > > this.sequenceListData.getItemAt(this.sequenceList.selectedIndex -
> > > 1).data = list2.data;
> > >
> > this.sequenceListData.getItemAt(this.sequenceList.selectedIndex).lab
> > el
> > > = list1.label;
> > >
> > this.sequenceListData.getItemAt(this.sequenceList.selectedIndex).dat
> > a =
> > > list1.data;
> > >
> > > // the following does not work
> > > this.sequenceList.selectedIndex =
> > > this.sequenceList.selectedIndex -
> > 1;
> > >
> > > // tryied with and without the refresh
> > > this.sequenceListData.refresh(); }
> > >
> > > Thank you all!
> >
> > --
> > Alex Harui
> > Flex SDK Team
> > Adobe Systems, Inc.
> > http://blogs.adobe.com/aharui
> >
> >
>
--
Lucas Junqueira
lucas@ciclope.art.br / (31)2555-0635 / (31)9133-6635 Ateliê Ciclope de arte e publicação digital
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Re: help with moving list elements up and down
Posted by Alex Harui <ah...@adobe.com>.
Is there a sort applied to the collection? Then you can't re-order it.
On 3/13/13 4:48 AM, "Lucas Junqueira / Ciclope" <lu...@ciclope.art.br>
wrote:
> Nope... nor validateNow or setting the item, instead of the index worked...
>
> 2013/3/13 Evyatar Ben Halevi-Arbib <ev...@gmail.com>
>
>> I suggest using the selectedItem property instead of selectedIndex.
>> I witnessed cases where changing the selectedIndex had no impact on the UI
>> and using selectedItem did work properly.
>>
>> Good luck,
>> Evyatar
>>
>> On Tue, Mar 12, 2013 at 11:29 PM, Alex Harui <ah...@adobe.com> wrote:
>>
>>> Try calling validateNow after changing selectedIndex.
>>>
>>>
>>> On 3/12/13 2:19 PM, "Lucas Junqueira / Ciclope" <lu...@ciclope.art.br>
>>> wrote:
>>>
>>>> Hi, I was trying to create an order list withe the spark list control.
>> I
>>>> would like to move itens up and down, but this seems to be a problem.
>>> Here
>>>> is the code I'm trying to use to move an item up. Can anyone tell me
>> why
>>> it
>>>> isn't working? The item label is, indeed, changed, but the list
>> selection
>>>> not (the selected index does not change):
>>>>
>>>> if (this.sequenceList.selectedIndex > 0) {
>>>> var list1:Object = new Object();
>>>> var list2:Object = new Object();
>>>> list1.label =
>>>> String(this.sequenceListData.getItemAt(this.sequenceList.selectedIndex
>> -
>>>> 1).label);
>>>> list1.data =
>>>> String(this.sequenceListData.getItemAt(this.sequenceList.selectedIndex
>> -
>>>> 1).data);
>>>> list2.label =
>>>>
>>>
>>>
>> String(this.sequenceListData.getItemAt(this.sequenceList.selectedIndex).label
>> )>
>>> ;
>>>> list2.data =
>>>>
>>>
>>
String(this.sequenceListData.getItemAt(this.sequenceList.selectedIndex).data)>>
;
>>>> this.sequenceListData.getItemAt(this.sequenceList.selectedIndex -
>>>> 1).label = list2.label;
>>>> this.sequenceListData.getItemAt(this.sequenceList.selectedIndex -
>>>> 1).data = list2.data;
>>>>
>>> this.sequenceListData.getItemAt(this.sequenceList.selectedIndex).label
>>>> = list1.label;
>>>>
>>> this.sequenceListData.getItemAt(this.sequenceList.selectedIndex).data =
>>>> list1.data;
>>>>
>>>> // the following does not work
>>>> this.sequenceList.selectedIndex = this.sequenceList.selectedIndex -
>>> 1;
>>>>
>>>> // tryied with and without the refresh
>>>> this.sequenceListData.refresh();
>>>> }
>>>>
>>>> Thank you all!
>>>
>>> --
>>> Alex Harui
>>> Flex SDK Team
>>> Adobe Systems, Inc.
>>> http://blogs.adobe.com/aharui
>>>
>>>
>>
>
>
--
Alex Harui
Flex SDK Team
Adobe Systems, Inc.
http://blogs.adobe.com/aharui
Re: help with moving list elements up and down
Posted by Lucas Junqueira / Ciclope <lu...@ciclope.art.br>.
Nope... nor validateNow or setting the item, instead of the index worked...
2013/3/13 Evyatar Ben Halevi-Arbib <ev...@gmail.com>
> I suggest using the selectedItem property instead of selectedIndex.
> I witnessed cases where changing the selectedIndex had no impact on the UI
> and using selectedItem did work properly.
>
> Good luck,
> Evyatar
>
> On Tue, Mar 12, 2013 at 11:29 PM, Alex Harui <ah...@adobe.com> wrote:
>
> > Try calling validateNow after changing selectedIndex.
> >
> >
> > On 3/12/13 2:19 PM, "Lucas Junqueira / Ciclope" <lu...@ciclope.art.br>
> > wrote:
> >
> > > Hi, I was trying to create an order list withe the spark list control.
> I
> > > would like to move itens up and down, but this seems to be a problem.
> > Here
> > > is the code I'm trying to use to move an item up. Can anyone tell me
> why
> > it
> > > isn't working? The item label is, indeed, changed, but the list
> selection
> > > not (the selected index does not change):
> > >
> > > if (this.sequenceList.selectedIndex > 0) {
> > > var list1:Object = new Object();
> > > var list2:Object = new Object();
> > > list1.label =
> > > String(this.sequenceListData.getItemAt(this.sequenceList.selectedIndex
> -
> > > 1).label);
> > > list1.data =
> > > String(this.sequenceListData.getItemAt(this.sequenceList.selectedIndex
> -
> > > 1).data);
> > > list2.label =
> > >
> >
> >
> String(this.sequenceListData.getItemAt(this.sequenceList.selectedIndex).label)>
> > ;
> > > list2.data =
> > >
> >
> String(this.sequenceListData.getItemAt(this.sequenceList.selectedIndex).data);
> > > this.sequenceListData.getItemAt(this.sequenceList.selectedIndex -
> > > 1).label = list2.label;
> > > this.sequenceListData.getItemAt(this.sequenceList.selectedIndex -
> > > 1).data = list2.data;
> > >
> > this.sequenceListData.getItemAt(this.sequenceList.selectedIndex).label
> > > = list1.label;
> > >
> > this.sequenceListData.getItemAt(this.sequenceList.selectedIndex).data =
> > > list1.data;
> > >
> > > // the following does not work
> > > this.sequenceList.selectedIndex = this.sequenceList.selectedIndex -
> > 1;
> > >
> > > // tryied with and without the refresh
> > > this.sequenceListData.refresh();
> > > }
> > >
> > > Thank you all!
> >
> > --
> > Alex Harui
> > Flex SDK Team
> > Adobe Systems, Inc.
> > http://blogs.adobe.com/aharui
> >
> >
>
--
Lucas Junqueira
lucas@ciclope.art.br / (31)2555-0635 / (31)9133-6635
Ateliê Ciclope de arte e publicação digital
Re: help with moving list elements up and down
Posted by Evyatar Ben Halevi-Arbib <ev...@gmail.com>.
I suggest using the selectedItem property instead of selectedIndex.
I witnessed cases where changing the selectedIndex had no impact on the UI
and using selectedItem did work properly.
Good luck,
Evyatar
On Tue, Mar 12, 2013 at 11:29 PM, Alex Harui <ah...@adobe.com> wrote:
> Try calling validateNow after changing selectedIndex.
>
>
> On 3/12/13 2:19 PM, "Lucas Junqueira / Ciclope" <lu...@ciclope.art.br>
> wrote:
>
> > Hi, I was trying to create an order list withe the spark list control. I
> > would like to move itens up and down, but this seems to be a problem.
> Here
> > is the code I'm trying to use to move an item up. Can anyone tell me why
> it
> > isn't working? The item label is, indeed, changed, but the list selection
> > not (the selected index does not change):
> >
> > if (this.sequenceList.selectedIndex > 0) {
> > var list1:Object = new Object();
> > var list2:Object = new Object();
> > list1.label =
> > String(this.sequenceListData.getItemAt(this.sequenceList.selectedIndex -
> > 1).label);
> > list1.data =
> > String(this.sequenceListData.getItemAt(this.sequenceList.selectedIndex -
> > 1).data);
> > list2.label =
> >
>
> String(this.sequenceListData.getItemAt(this.sequenceList.selectedIndex).label)>
> ;
> > list2.data =
> >
> String(this.sequenceListData.getItemAt(this.sequenceList.selectedIndex).data);
> > this.sequenceListData.getItemAt(this.sequenceList.selectedIndex -
> > 1).label = list2.label;
> > this.sequenceListData.getItemAt(this.sequenceList.selectedIndex -
> > 1).data = list2.data;
> >
> this.sequenceListData.getItemAt(this.sequenceList.selectedIndex).label
> > = list1.label;
> >
> this.sequenceListData.getItemAt(this.sequenceList.selectedIndex).data =
> > list1.data;
> >
> > // the following does not work
> > this.sequenceList.selectedIndex = this.sequenceList.selectedIndex -
> 1;
> >
> > // tryied with and without the refresh
> > this.sequenceListData.refresh();
> > }
> >
> > Thank you all!
>
> --
> Alex Harui
> Flex SDK Team
> Adobe Systems, Inc.
> http://blogs.adobe.com/aharui
>
>
Re: help with moving list elements up and down
Posted by Alex Harui <ah...@adobe.com>.
Try calling validateNow after changing selectedIndex.
On 3/12/13 2:19 PM, "Lucas Junqueira / Ciclope" <lu...@ciclope.art.br>
wrote:
> Hi, I was trying to create an order list withe the spark list control. I
> would like to move itens up and down, but this seems to be a problem. Here
> is the code I'm trying to use to move an item up. Can anyone tell me why it
> isn't working? The item label is, indeed, changed, but the list selection
> not (the selected index does not change):
>
> if (this.sequenceList.selectedIndex > 0) {
> var list1:Object = new Object();
> var list2:Object = new Object();
> list1.label =
> String(this.sequenceListData.getItemAt(this.sequenceList.selectedIndex -
> 1).label);
> list1.data =
> String(this.sequenceListData.getItemAt(this.sequenceList.selectedIndex -
> 1).data);
> list2.label =
>
String(this.sequenceListData.getItemAt(this.sequenceList.selectedIndex).label)>
;
> list2.data =
> String(this.sequenceListData.getItemAt(this.sequenceList.selectedIndex).data);
> this.sequenceListData.getItemAt(this.sequenceList.selectedIndex -
> 1).label = list2.label;
> this.sequenceListData.getItemAt(this.sequenceList.selectedIndex -
> 1).data = list2.data;
> this.sequenceListData.getItemAt(this.sequenceList.selectedIndex).label
> = list1.label;
> this.sequenceListData.getItemAt(this.sequenceList.selectedIndex).data =
> list1.data;
>
> // the following does not work
> this.sequenceList.selectedIndex = this.sequenceList.selectedIndex - 1;
>
> // tryied with and without the refresh
> this.sequenceListData.refresh();
> }
>
> Thank you all!
--
Alex Harui
Flex SDK Team
Adobe Systems, Inc.
http://blogs.adobe.com/aharui