[Seaside] how to make a list of items that can be rearranged via drag and drop or buttons

[Esteban Maringolo]

Hi Louis,

I use jQuery UI sortable() [1] for this. You need to add the
JQUiDeploymentLibrary library to your application (or link the to the
files).

MyComponent>>renderContentOn: html

html div
"snip"
 script: (self createSortableOn: html)
"snip"

MyComponent>>createSortableOn: html

^(((html jQuery id: self elementId)
  find: '.' , self containerCssClass , ':first') sortable)
  placeholder: 'placeholder';
  handle: '.sort-handle';
  onStart: ((JSStream on: 'ui.placeholder.height(ui.item.height());')
asFunction: #('e' 'ui'));
  onUpdate: (self createSortableUpdateScriptOn: html);
  yourself


MyComponent>>createSortableUpdateScriptOn: html
^html jQuery post
  callback: [:v | self reorderChildrenWithSequence: (v subStrings:
',')] value: (((html jQuery id: self elementId)
  find: '.' , self containerCssClass, ':first') call: 'sortable' with:
'toArray')

Each sortable DOM element has an id attribute that is what the
sortable("toArray") uses to get the id of each (it is also
configurable), then with that collection of IDs look for them in my
model:

reorderChildrenWithSequence: anOrderedCollection
  self children: (anOrderedCollection collect: [:each | self children
detect: [:one | one elementId = each]]).
  self model children: (self children collect: [:each | each model])

Also I use a placeholder while the dragging begins, you can remove the
onStart: part if you're not interested in it.

I hope this helps you get started.

Best regards,

[1] https://jqueryui.com/sortable/

ps: My case is a little more complicated as I can sort at arbitrary
depth (but only within the same level of depth), but it's a single
component that recursively builds a tree of components.
You can replace the ((html jQuery id: self elementId) find: '.' , self
containerCssClass , ':first') by your jQuery instance.


Esteban A. Maringolo



On Tue, Jul 14, 2020 at 4:50 PM Louis LaBrunda
<Lou at keystone-software.com> wrote:
>
> Hi All,
>
> Can anyone please give me an example of how to make a list of items that can be rearranged via drag and drop or buttons
> and the new order retrieved?
>
> Lou
> --
> Louis LaBrunda
> Keystone Software Corp.
> SkypeMe callto://PhotonDemon
>
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