script.aculo.us - Sortable.create move Element Up and Down with Arrows

Hi folks!

Yep, I’m a script.aculo.us disciple, too. To enhance the usability of my WordPress plugins I integrated a drag and drop list in GeneralStats and TimeZoneCalculator. As it is sometimes not possible, for example due to handicaps or technical difficulties, to conduct drag and drop operations, I additionally thought about arrows on each list element which provide a re-ordering functionality.

There is not method available in the standard script.aculo.us package and the proposal on up / down buttons on the script.aculo.us wiki seemed inefficient, as the list elements are cloned and therefore recreated every time the list is re-ordered. Hence memory usage can be decreased by reordering only the sequence. edit 2008-09-28: the script.aculo.us wiki has moved and the post I’ve referred to does not exist anymore.

In the next paragraphs I provide the code snippets and a full working example of my solution. – comments and feedback are welcome…

have fun!
berny

move Element up

move Element down

Example

8 Responses to “script.aculo.us - Sortable.create move Element Up and Down with Arrows”

  1. joelbloch
    joelbloch
    joelbloch probably commented in France says:

    Hello,
    Thanks a lot for your example, it is very helpfull. I am currently discovering scriptaculous, and all the effects which can be added in javascript.
    I must say I am little confused about Sortable.setSequence, escape, unescape, Sortable.sequence… I can’t find any documentation on these methods. Would you have some?

    Thanks and regards,
    Joel

  2. Berny
    Berny
    Berny probably commented in Austria says:

    hi joel!

    i totally agree, Sortable.sequence is not documented at all. – i got all my infos from the scriptaculous wiki. you could perhaps post your question there or do reverse engineering (like me)…

    berny

  3. Nikk Folts
    Nikk Folts
    Nikk Folts probably commented in United States says:

    I abstracted your’s a little to make it much shorter:

    function moveUp(list, row) {
    moveRow(list, row, 1);
    }

    function moveDown(list, row) {
    moveRow(list, row, -1);
    }

    function moveRow(list, row, dir) {
    var sequence=Sortable.sequence(list);
    for (var j=0; j<sequence.length; j++) {
    var i = j – dir;
    if (sequence[j]==row && i >= 0 && i <= sequence.length) {
    var temp=sequence[i];
    sequence[i]=row;
    sequence[j]=temp;
    break;
    }
    }
    Sortable.setSequence(list, sequence);
    }

    Hope you find it as useful as I found yours…

  4. Berny
    Berny
    Berny probably commented in Austria says:

    hi nikk!

    thanks for your contribution. – nice you refactored my source code.

    i changed the algos in my wordpress plugins after adoption and credited you with your website. the new versions will be published in the upcoming weeks…

    berny

  5. davo
    davo
    davo probably commented in Australia says:

    Hi is there anyway for me to get the id of the element that was moved in the onupdate function? this is when they drag the element to another position as i need to check attributes of only that element before i finish the onupdate function

  6. Berny
    Berny
    Berny probably commented in Austria says:

    hi davo!

    sorry, i don’t know a way to get the element id while dragging. – perhaps you should have a look in the script.aculo.us wiki.

    berny

  7. nickmorss
    nickmorss
    nickmorss probably commented in United Kingdom says:

    Hi davo,

    im trying to work on a drag and dropable / sortable list which allows me to also move data into another list.

    the idea is that the user drags the items into an intially blank list they want to use and then they can sort them there.

    any ideas on how i can chianve this?

    Nick

  8. Berny
    Berny
    Berny probably commented in Thailand says:

    hi nick!

    i already implemented your requirements in my wordpress plugins timezonecalculator and generalstats. maybe you want to have a look.

    berny

Leave a Reply

You must be logged in to post a comment.