gridstack.js

gridstack.js is a jQuery plugin for widget layout. This is drag-and-drop multi-column grid. It allows you to build draggable responsive bootstrap v3 friendly layouts. It also works great with knockout.js and touch devices.

Inspired by gridster.js. Built with love.

Table of Contents generated with DocToc

Demo
Usage
Changes - v0.2.4 (development version) - v0.2.3 (2015-06-23) - v0.2.2 (2014-12-23) - v0.2.1 (2014-12-09) - v0.2.0 (2014-11-30) - v0.1.0 (2014-11-18)
License

Demo

Please visit http://troolee.github.io/gridstack.js/ for demo.

Usage

Requirements

lodash.js (>= 3.5.0)
jQuery (>= 1.11.0)
jQuery UI (>= 1.11.0). Minimum required components: Core, Widget, Mouse, Draggable, Resizable
(Optional) knockout.js (>= 3.2.0)
(Optional) jquery-ui-touch-punch for touch-based devices support

Note: You can still use underscore.js (>= 1.7.0) instead of lodash.js

Basic usage

<div class="grid-stack">
    <div class="grid-stack-item" 
        data-gs-x="0" data-gs-y="0" 
        data-gs-width="4" data-gs-height="2">
            <div class="grid-stack-item-content"></div>
    </div>
    <div class="grid-stack-item" 
        data-gs-x="4" data-gs-y="0" 
        data-gs-width="4" data-gs-height="4">
            <div class="grid-stack-item-content"></div>
    </div>
</div>

<script type="text/javascript">
$(function () {
    var options = {
        cell_height: 80,
        vertical_margin: 10
    };
    $('.grid-stack').gridstack(options);
});
</script>

Options

always_show_resize_handle - if true the resizing handles are shown even if the user is not hovering over the widget (default: false)
animate - turns animation on (default: false)
auto - if false gridstack will not initialize existing items (default: true)
cell_height - one cell height (default: 60)
draggable - allows to override jQuery UI draggable options. (default: {handle: '.grid-stack-item-content', scroll: true, appendTo: 'body'})
handle - draggable handle selector (default: '.grid-stack-item-content')
height - maximum rows amount. Default is 0 which means no maximum rows
float - enable floating widgets (default: false) See example
item_class - widget class (default: 'grid-stack-item')
min_width - minimal width. If window width is less, grid will be shown in one-column mode (default: 768)
placeholder_class - class for placeholder (default: 'grid-stack-placeholder')
resizable - allows to override jQuery UI resizable options. (default: {autoHide: true, handles: 'se'})
static_grid - makes grid static (default false). If true widgets are not movable/resizable. You don't even need jQueryUI draggable/resizable. A CSS class grid-stack-static is also added to the container.
vertical_margin - vertical gap size (default: 20)
width - amount of columns (default: 12)

Grid attributes

data-gs-animate - turns animation on
data-gs-width - amount of columns
data-gs-height - maximum rows amount. Default is 0 which means no maximum rows.

Item attributes

data-gs-x, data-gs-y - element position
data-gs-width, data-gs-height - element size
data-gs-max-width, data-gs-min-width, data-gs-max-height, data-gs-min-height - element constraints
data-gs-no-resize - disable element resizing
data-gs-no-move - disable element moving
data-gs-auto-position - tells to ignore data-gs-x and data-gs-y attributes and to place element to the first available position
data-gs-locked - the widget will be locked. It means another widget wouldn't be able to move it during dragging or resizing. The widget can still be dragged or resized. You need to add data-gs-no-resize and data-gs-no-move attributes to completely lock the widget.

Events

onchange(items)

Occurs when adding/removing widgets or existing widgets change their position/size

var serialize_widget_map = function (items) {
    console.log(items);
};

$('.grid-stack').on('change', function (e, items) {
    serialize_widget_map(items);
});

ondragstart(event, ui)

$('.grid-stack').on('dragstart', function (event, ui) {
    var grid = this;
    var element = event.target;
});

ondragstop(event, ui)

$('.grid-stack').on('dragstop', function (event, ui) {
    var grid = this;
    var element = event.target;
});

onresizestart(event, ui)

$('.grid-stack').on('resizestart', function (event, ui) {
    var grid = this;
    var element = event.target;
});

onresizestop(event, ui)

$('.grid-stack').on('resizestop', function (event, ui) {
    var grid = this;
    var element = event.target;
});

API

add_widget(el, x, y, width, height, auto_position)

Creates new widget and returns it.

Parameters:

el - widget to add
x, y, width, height - widget position/dimensions (Optional)
auto_position - if true then x, y parameters will be ignored and widget will be places on the first available position

Widget will be always placed even if result height is more than actual grid height. You need to use will_it_fit method before calling add_widget for additional check.

$('.grid-stack').gridstack();

var grid = $('.grid-stack').data('gridstack');
grid.add_widget(el, 0, 0, 3, 2, true);

batch_update()

Initailizes batch updates. You will see no changes until commit method is called.

cell_height()

Gets current cell height.

cell_height(val)

Update current cell height. This method rebuilds an internal CSS stylesheet. Note: You can expect performance issues if call this method too often.

grid.cell_height(grid.cell_width() * 1.2);

cell_width()

Gets current cell width.

commit()

Finishes batch updates. Updates DOM nodes. You must call it after batch_update.

destroy()

Destroys a grid instance.

disable()

Disables widgets moving/resizing. This is a shortcut for:

grid.movable('.grid-stack-item', false);
grid.resizable('.grid-stack-item', false);

enable()

Enables widgets moving/resizing. This is a shortcut for:

grid.movable('.grid-stack-item', true);
grid.resizable('.grid-stack-item', true);

get_cell_from_pixel(position)

Get the position of the cell under a pixel on screen.

Parameters :

position - the position of the pixel to resolve in absolute coordinates, as an object with top and leftproperties

Returns an object with properties x and y i.e. the column and row in the grid.

is_area_empty(x, y, width, height)

Checks if specified area is empty.

locked(el, val)

Locks/unlocks widget.

el - widget to modify.
val - if true widget will be locked.

min_width(el, val)

Set the minWidth for a widget.

el - widget to modify.
val - A numeric value of the number of columns

min_height(el, val)

Set the minHeight for a widget.

el - widget to modify.
val - A numeric value of the number of rows

movable(el, val)

Enables/Disables moving.

el - widget to modify
val - if true widget will be draggable.

move(el, x, y)

Changes widget position

Parameters:

el - widget to move
x, y - new position. If value is null or undefined it will be ignored.

remove_widget(el, detach_node)

Removes widget from the grid.

Parameters:

el - widget to remove.
detach_node - if false DOM node won't be removed from the tree (Optional. Default true).

remove_all()

Removes all widgets from the grid.

resize(el, width, height)

Changes widget size

Parameters:

el - widget to resize
width, height - new dimensions. If value is null or undefined it will be ignored.

resizable(el, val)

Enables/Disables resizing.

el - widget to modify
val - if true widget will be resizable.

set_static(static_value)

Toggle the grid static state. Also toggle the grid-stack-static class.

static_value - if true the grid become static.

update(el, x, y, width, height)

Parameters:

el - widget to move
x, y - new position. If value is null or undefined it will be ignored.
width, height - new dimensions. If value is null or undefined it will be ignored.

Updates widget position/size.

will_it_fit(x, y, width, height, auto_position)

Returns true if the height of the grid will be less the vertical constraint. Always returns true if grid doesn't have height constraint.

if (grid.will_it_fit(new_node.x, new_node.y, new_node.width, new_node.height, true)) {
    grid.add_widget(new_node.el, new_node.x, new_node.y, new_node.width, new_node.height, true);
}
else {
    alert('Not enough free space to place the widget');
}

Utils

GridStackUI.Utils.sort(nodes, dir, width)

Sorts array of nodes

nodes - array to sort
dir - 1 for asc, -1 for desc (optional)
width - width of the grid. If undefined the width will be calculated automatically (optional).

Touch devices support

Please use jQuery UI Touch Punch to make jQuery UI Draggable/Resizable working on touch-based devices.

<script src="lodash.min.js"></script>
<script src="jquery.min.js"></script>
<script src="jquery-ui.min.js"></script>
<script src="jquery.ui.touch-punch.min.js"></script>

<script src="gridstack.js"></script>

Also always_show_resize_handle option may be useful:

$(function () {
    var options = {
        always_show_resize_handle: /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent)
    };
    $('.grid-stack').gridstack(options);
});

Use with knockout.js

ko.components.register('dashboard-grid', {
    viewModel: {
        createViewModel: function (controller, componentInfo) {
            var ViewModel = function (controller, componentInfo) {
                var grid = null;

                this.widgets = controller.widgets;

                this.afterAddWidget = function (items) {
                    if (grid == null) {
                        grid = $(componentInfo.element).find('.grid-stack').gridstack({
                            auto: false
                        }).data('gridstack');
                    }

                    var item = _.find(items, function (i) { return i.nodeType == 1 });
                    grid.add_widget(item);
                    ko.utils.domNodeDisposal.addDisposeCallback(item, function () {
                        grid.remove_widget(item);
                    });
                };
            };

            return new ViewModel(controller, componentInfo);
        }
    },
    template:
        [
            '<div class="grid-stack" data-bind="foreach: {data: widgets, afterRender: afterAddWidget}">',
            '   <div class="grid-stack-item" data-bind="attr: {\'data-gs-x\': $data.x, \'data-gs-y\': $data.y, \'data-gs-width\': $data.width, \'data-gs-height\': $data.height, \'data-gs-auto-position\': $data.auto_position}">',
            '       <div class="grid-stack-item-content">...</div>',
            '   </div>',
            '</div> '
        ].join('')
});

$(function () {
    var Controller = function (widgets) {
        this.widgets = ko.observableArray(widgets);
    };

    var widgets = [
        {x: 0, y: 0, width: 2, height: 2},
        {x: 2, y: 0, width: 4, height: 2},
        {x: 6, y: 0, width: 2, height: 4},
        {x: 1, y: 2, width: 4, height: 2}
    ];

    ko.applyBindings(new Controller(widgets));
});

and HTML:

<div data-bind="component: {name: 'dashboard-grid', params: $data}"></div>

See examples: example 1, example 2.

Notes: It's very important to exclude training spaces after widget template:

template:
    [
        '<div class="grid-stack" data-bind="foreach: {data: widgets, afterRender: afterAddWidget}">',
        '   <div class="grid-stack-item" data-bind="attr: {\'data-gs-x\': $data.x, \'data-gs-y\': $data.y, \'data-gs-width\': $data.width, \'data-gs-height\': $data.height, \'data-gs-auto-position\': $data.auto_position}">',
        '       ....',
        '   </div>', // <-- NO SPACE **AFTER** </div>
        '</div> '    // <-- NO SPACE **BEFORE** </div>
    ].join('')       // <-- JOIN WITH **EMPTY** STRING

Otherwise addDisposeCallback won't work.

Change grid width

To change grid width (columns count), to addition to width option, CSS rules for .grid-stack-item[data-gs-width="X"] and .grid-stack-item[data-gs-x="X"] have to be changed accordingly.

For instance for 3-column grid you need to rewrite CSS to be:

.grid-stack-item[data-gs-width="3"]  { width: 100% }
.grid-stack-item[data-gs-width="2"]  { width: 66.66666667% }
.grid-stack-item[data-gs-width="1"]  { width: 33.33333333% }

.grid-stack-item[data-gs-x="2"]  { left: 66.66666667% }
.grid-stack-item[data-gs-x="1"]  { left: 33.33333333% }

For 4-column grid it should be:

.grid-stack-item[data-gs-width="4"]  { width: 100% }
.grid-stack-item[data-gs-width="3"]  { width: 75% }
.grid-stack-item[data-gs-width="2"]  { width: 50% }
.grid-stack-item[data-gs-width="1"]  { width: 25% }

.grid-stack-item[data-gs-x="3"]  { left: 75% }
.grid-stack-item[data-gs-x="2"]  { left: 50% }
.grid-stack-item[data-gs-x="1"]  { left: 25% }

and so on.

Here is a SASS code snipped which can make life easier (Thanks to @ascendantofrain, #81):

.grid-stack-item {

    $gridstack-columns: 12;

    @for $i from 1 through $gridstack-columns {
        &[data-gs-width='#{$i}'] { width: (100% / $gridstack-columns) * $i; }
        &[data-gs-x='#{$i}'] { left: (100% / $gridstack-columns) * $i; }
        &.grid-stack-item[data-gs-min-width='#{$i}'] { min-width: (100% / $gridstack-columns) * $i; }
        &.grid-stack-item[data-gs-max-width='#{$i}'] { max-width: (100% / $gridstack-columns) * $i; }
    }
}

Or you can include gridstack-extra.css. See below for more details.

Extra CSS

There are few extra CSS batteries in gridstack-extra.css (gridstack-extra.min.css).

Different grid widths

You can use other than 12 grid width:

<div class="grid-stack grid-stack-N">...</div>

$('.grid-stack').gridstack({width: N});

See example: 2 grids demo

Save grid to array

Because gridstack doesn't track any kind of user-defined widget id there is no reason to make serialization to be part of gridstack API. To serialize grid you can simply do something like this (let's say you store widget id inside data-custom-id attribute):

var res = _.map($('.grid-stack .grid-stack-item:visible'), function (el) {
    el = $(el);
    var node = el.data('_gridstack_node');
    return {
        id: el.attr('data-custom-id'),
        x: node.x,
        y: node.y,
        width: node.width,
        height: node.height
    };
});
alert(JSON.stringify(res));

See example: Serialization demo

You can also use onchange event if you need to save only changed widgets right away they have been changed.

Load grid from array

var serialization = [
    {x: 0, y: 0, width: 2, height: 2},
    {x: 3, y: 1, width: 1, height: 2},
    {x: 4, y: 1, width: 1, height: 1},
    {x: 2, y: 3, width: 3, height: 1},
    {x: 1, y: 4, width: 1, height: 1},
    {x: 1, y: 3, width: 1, height: 1},
    {x: 2, y: 4, width: 1, height: 1},
    {x: 2, y: 5, width: 1, height: 1}
];

serialization = GridStackUI.Utils.sort(serialization);

var grid = $('.grid-stack').data('gridstack');
grid.remove_all();

_.each(serialization, function (node) {
    grid.add_widget($('<div><div class="grid-stack-item-content" /><div/>'), 
        node.x, node.y, node.width, node.height);
});

See example: Serialization demo

If you're using knockout there is no need for such method at all.

Override resizable/draggable options

You can override default resizable/draggable options. For instance to enable other then bottom right resizing handle you can init gridsack like:

$('.grid-stack').gridstack({
    resizable: {
        handles: 'e, se, s, sw, w'
    }
});

Note: It's not recommended to enable nw, n, ne resizing handles. Their behaviour may be unexpected.

IE8 support

Support of IE8 is quite limited and is not a goal at this time. As far as IE8 doesn't support DOM Level 2 I cannot manipulate with CSS stylesheet dynamically. As a workaround you can do the following:

Create gridstack-ie8.css for your configuration (sample for grid with cell height of 60px can be found here).
Include this CSS:

<!--[if lt IE 9]>
<link rel="stylesheet" href="gridstack-ie8.css"/>
<![endif]-->

You can use this python script to generate such kind of CSS:

#!/usr/bin/env python

height = 60
margin = 20
N = 100

print '.grid-stack > .grid-stack-item { min-height: %(height)spx }' % {'height': height}

for i in range(N):
	h = height * (i + 1) + margin * i
	print '.grid-stack > .grid-stack-item[data-gs-height="%(index)s"] { height: %(height)spx }' % {'index': i + 1, 'height': h}

for i in range(N):
	h = height * (i + 1) + margin * i
	print '.grid-stack > .grid-stack-item[data-gs-min-height="%(index)s"] { min-height: %(height)spx }' % {'index': i + 1, 'height': h}

for i in range(N):
	h = height * (i + 1) + margin * i
	print '.grid-stack > .grid-stack-item[data-gs-max-height="%(index)s"] { max-height: %(height)spx }' % {'index': i + 1, 'height': h}

for i in range(N):
	h = height * i + margin * i
	print '.grid-stack > .grid-stack-item[data-gs-y="%(index)s"] { top: %(height)spx }' % {'index': i , 'height': h}

There are at least two more issues with gridstack in IE8 with jQueryUI resizable (it seems it doesn't work) and droppable. If you have any suggestions about support of IE8 you are welcome here: gridstack#76

Nested grids

Gridstack may be nested. All nested grids have an additional class grid-stack-nested which is assigned automatically during initialization. See example: Nested grid demo

Changes

v0.2.4 (development version)

fix closure compiler/linter warnings
add static_grid option.
add min_width/min_height methods (Thanks to @cvillemure)
add destroy method (Thanks to @zspitzer)

v0.2.3 (2015-06-23)

gridstack-extra.css
add support of lodash.js
add is_area_empty method
nested grids
add batch_update/commit methods
add update method
allow to override resizable/draggable options
add disable/enable methods
add get_cell_from_pixel (thanks to @juchi)
AMD support
fix nodes sorting
improved touch devices support
add always_show_resize_handle option
minor fixes and improvements

v0.2.2 (2014-12-23)

fix grid initialization
add cell_height/cell_width API methods
fix boolean attributes (issue #31)

v0.2.1 (2014-12-09)

add widgets locking (issue #19)
add will_it_fit API method
fix auto-positioning (issue #20)
add animation (thanks to @ishields)
fix y coordinate calculation when dragging (issue #18)
fix remove_widget (issue #16)
minor fixes

v0.2.0 (2014-11-30)

add height option
auto-generate css rules (widgets height and top)
add GridStackUI.Utils.sort utility function
add remove_all API method
add resize and move API methods
add resizable and movable API methods
add data-gs-no-move attribute
add float option
fix default css rule for inner content
minor fixes

v0.1.0 (2014-11-18)

Very first version.

License

The MIT License (MIT)

Copyright (c) 2014-2015 Pavel Reznikov

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

License

hypnoce/gridstack.js

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