Question

Please take a look at this fiddle: http://jsfiddle.net/dhcyA/

Try clicking on a block. What I want is that when the other elements disapear, the selected block will animate/ease to his giving position instead of just jumping like it does now. Then the same animation repeats itself when clicking again on the box, but then back to place.

Maybe to keep in mind:
I’m using a reponsive design, which means those blocks can be vertical and horizontal after scaling the window.

Any redevisions on the fiddle or suggustions would be great!

Answer 1

Here is my solution.

On your existing markup, I added a wrapper division to calculate the position of boxes inside the wrapper. Like this

<div id="wrapper">
    <div class="block">
        <h2>I'm block 1</h2>
    </div>
    ....
</div>

To maintain the fluidness of the block, I created a function to position the block on the wrapper. Here is the function for position of the blocks:

var reposition = function() {
    wrapper = $("#wrapper");
    console.log(wrapper.innerWidth());
    pLeft = 0;
    pTop = 0;
    maxRowHeight = 0;
    $(".block").each(function(){
        if($(this).data('active')) {
            $(this).data('top', pTop);
            $(this).data('left', pLeft);
        } else {
            $(this).stop(0,0).animate({
              'top' : pTop + 'px',
              'left' : pLeft + 'px'
            });
        }
            pLeft += $(this).outerWidth() + parseInt($(this).css('marginLeft'));
            if($(this).height() > maxRowHeight) maxRowHeight = $(this).outerHeight() + parseInt($(this).css('marginTop')); //Find out the longest block on the row

            if(pLeft + $(this).next().outerWidth() + parseInt($(this).next().css('marginLeft')) >= wrapper.innerWidth()) {
               pLeft = 0;
               pTop += maxRowHeight;
               maxRowHeight = 0;
            }

    });    
};

Finally, the script to toggle the block

$(".block").click(function() {

    $(this).siblings().slideToggle('slow'); //Toggle other blocks

    if(!$(this).data('active')){ //if the block is not active
        $(this).data('left', $(this).position().left); //sets its left
        $(this).data('top', $(this).position().top);   // and top position
        $(this).animate({ //animate at the top and bottom
            top:0,
            left:0
        },'slow');

        $(this).data('active',true);

    }else{

        $(this).animate({ //animate to its last known position
            top:$(this).data('top'),
            left:$(this).data('left')
        },'slow');

        $(this).data('active',false);
    }
});

Demos

• Demo[Full] (Resize this to see the fluidness maintained)
• Demo[Full] (version showing variable heights)

Here is what this solutions gives:

• Remembers the last position and gradually animate to/from this position
• Block positions are calculated and animated on load and every resize
• Repositioning happens on $(window).resize() thus maintaining the fluid nature of the block, despite the use of position absolute
• Support variable heights
• Minor change on existing markup & CSS

Also fixed two issues extended by Gaby

• Accounts for each block margin independently
• Recalculates the position of the element after resize