smart-energy-monitor/software/flow/node_modules/gridstack/doc/README.md

gridstack.js API

Table of Contents generated with DocToc

• Options
• Grid attributes
• Item attributes
• Events
  • added(event, items)
  • change(event, items)
  • disable(event)
  • dragstart(event, ui)
  • dragstop(event, ui)
  • dropped(event, previousWidget, newWidget)
  • enable(event)
  • removed(event, items)
  • resizestart(event, ui)
  • gsresizestop(event, ui)
• API
  • addWidget(el, [options])
  • addWidget(el, [x, y, width, height, autoPosition, minWidth, maxWidth, minHeight, maxHeight, id])
  • batchUpdate()
  • compact()
  • cellHeight()
  • cellHeight(val, noUpdate)
  • cellWidth()
  • commit()
  • destroy([detachGrid])
  • disable()
  • enable()
  • enableMove(doEnable, includeNewWidgets)
  • enableResize(doEnable, includeNewWidgets)
  • float(val?)
  • getCellFromPixel(position[, useOffset])
  • isAreaEmpty(x, y, width, height)
  • locked(el, val)
  • makeWidget(el)
  • maxHeight(el, val)
  • minHeight(el, val)
  • maxWidth(el, val)
  • minWidth(el, val)
  • movable(el, val)
  • move(el, x, y)
  • removeWidget(el[, detachNode])
  • removeAll([detachNode])
  • resize(el, width, height)
  • resizable(el, val)
  • setAnimation(doAnimate)
  • setColumn(column, doNotPropagate)
  • setStatic(staticValue)
  • update(el, x, y, width, height)
  • verticalMargin()
  • verticalMargin(value, noUpdate)
  • willItFit(x, y, width, height, autoPosition)
• Utils
  • GridStackUI.Utils.sort(nodes[, dir[, width]])

Options

• acceptWidgets - accept widgets dragged from other grids or from outside (default: false). Can be:
  • true (uses '.grid-stack-item' class filter) or false
  • string for explicit class name
  • function (i: number, element: Element) returning a boolean. See example
• alwaysShowResizeHandle - 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)
• cellHeight - one cell height (default: 60). Can be:
  • an integer (px)
  • a string (ex: '100px', '10em', '10rem', '10%')
  • 0 or null, in which case the library will not generate styles for rows. Everything must be defined in CSS files.
  • 'auto' - height will be calculated to match cell width (initial square grid).
• column - number of columns (default: 12) which can change on the fly with setColumn() as well. See example
• ddPlugin - class that implement drag'n'drop functionallity for gridstack. If false grid will be static. (default: null - first available plugin will be used)
• disableDrag - disallows dragging of widgets (default: false).
• disableOneColumnMode - disables the onColumnMode when the window width is less than minWidth (default: 'false')
• disableResize - disallows resizing of widgets (default: false).
• draggable - allows to override jQuery UI draggable options. (default: {handle: '.grid-stack-item-content', scroll: false, appendTo: 'body', containment: null})
• dragOut to let user drag nested grid items out of a parent or not (default false) See example
• float - enable floating widgets (default: false) See example
• handle - draggable handle selector (default: '.grid-stack-item-content')
• handleClass - draggable handle class (e.g. 'grid-stack-item-content'). If set handle is ignored (default: null)
• itemClass - widget class (default: 'grid-stack-item')
• maxRow - maximum rows amount. Default is 0 which means no maximum rows
• minWidth - minimal width. If window width is less than or equal to, grid will be shown in one-column mode (default: 768)
• oneColumnModeDomSort - set to true if you want oneColumnMode to use the DOM order and ignore x,y from normal multi column layouts during sorting. This enables you to have custom 1 column layout that differ from the rest. (default?: false)
• placeholderClass - class for placeholder (default: 'grid-stack-placeholder')
• placeholderText - placeholder default content (default: '')
• resizable - allows to override jQuery UI resizable options. (default: {autoHide: true, handles: 'se'})
• removable - if true widgets could be removed by dragging outside of the grid. It could also be a jQuery selector string, in this case widgets will be removed by dropping them there (default: false) See example
• removeTimeout - time in milliseconds before widget is being removed while dragging outside of the grid. (default: 2000)
• rtl - if true turns grid to RTL. Possible values are true, false, 'auto' (default: 'auto') See example
• staticGrid - 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.
• verticalMargin - vertical gap size (default: 20). Can be:
  • an integer (px)
  • a string (ex: '2em', '20px', '2rem')

Grid attributes

• data-gs-animate - turns animation on
• data-gs-column - amount of columns. Setting non-default value must be supported by equivalent change in CSS, see docs here.
• data-gs-max-row - maximum rows amount. Default is 0 which means no maximum rows.
• data-gs-current-height - current rows amount. Set by the library only. Can be used by the CSS rules.

Item attributes

• data-gs-x, data-gs-y - (number) element position in row/column. Note: if one is missing this will autoPosition the item
• data-gs-width, data-gs-height - (number) element size in row/column
• data-gs-id- (number | string) good for quick identification (for example in change event)
• data-gs-max-width, data-gs-min-width, data-gs-max-height, data-gs-min-height - element constraints in row/column
• 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. Having either one missing will also do that.
• 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.
• data-gs-resize-handles - sets resize handles for a specific widget.

Events

added(event, items)

$('.grid-stack').on('added', function(event, items) {
  for (var i = 0; i < items.length; i++) {
    console.log('item added');
    console.log(items[i]);
  }
});

change(event, items)

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

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

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

disable(event)

$('.grid-stack').on('disable', function(event) {
  var grid = event.target;
});

dragstart(event, ui)

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

dragstop(event, ui)

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

dropped(event, previousWidget, newWidget)

$('.grid-stack').on('dropped', function(event, previousWidget, newWidget) {
  console.log('Removed widget that was dragged out of grid:', previousWidget);
  console.log('Added widget in dropped grid:', newWidget);
});

enable(event)

$('.grid-stack').on('enable', function(event) {
  var grid = event.target;
});

removed(event, items)

$('.grid-stack').on('removed', function(event, items) {
  for (var i = 0; i < items.length; i++) {
    console.log('item removed');
    console.log(items[i]);
  }
});

resizestart(event, ui)

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

gsresizestop(event, ui)

Note: this is a custom event name that is guaranteed to be called after the jqueryui resizestop event where we update data-gs-width and data-gs-height.

$('.grid-stack').on('gsresizestop', function(event, elem) {
  var newHeight = $(elem).attr('data-gs-height');
});

API

addWidget(el, [options])

Creates new widget and returns it. Options is an object containing the fields x,y,width,height,etc... described below.

addWidget(el, [x, y, width, height, autoPosition, minWidth, maxWidth, minHeight, maxHeight, id])

Creates new widget and returns it.

Parameters:

• el - widget to add
• x, y, width, height - widget position/dimensions (optional)
• autoPosition - if true then x, y parameters will be ignored and widget will be places on the first available position (optional)
• minWidth minimum width allowed during resize/creation (optional)
• maxWidth maximum width allowed during resize/creation (optional)
• minHeight minimum height allowed during resize/creation (optional)
• maxHeight maximum height allowed during resize/creation (optional)
• id value for data-gs-id (optional)

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

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

batchUpdate()

starts batch updates. You will see no changes until commit() method is called.

compact()

relayout grid items to reclaim any empty space.

cellHeight()

Gets current cell height.

cellHeight(val, noUpdate)

Update current cell height. This method rebuilds an internal CSS stylesheet (unless optional noUpdate=true). Note: You can expect performance issues if call this method too often.

grid.cellHeight(grid.cellWidth() * 1.2);

cellWidth()

Gets current cell width.

commit()

Ends batch updates. Updates DOM nodes. You must call it after batchUpdate().

destroy([detachGrid])

Destroys a grid instance.

Parameters:

• detachGrid - if false nodes and grid will not be removed from the DOM (Optional. Default true).

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);

enableMove(doEnable, includeNewWidgets)

Enables/disables widget moving. includeNewWidgets will force new widgets to be draggable as per doEnable's value by changing the disableDrag grid option. This is a shortcut for:

grid.movable(this.container.children('.' + this.opts.itemClass), doEnable);

enableResize(doEnable, includeNewWidgets)

Enables/disables widget resizing. includeNewWidgets will force new widgets to be resizable as per doEnable's value by changing the disableResize grid option. This is a shortcut for:

grid.resizable(this.container.children('.' + this.opts.itemClass), doEnable);

float(val?)

set/get floating widgets (default: false)

• val - boolean to set true/false, else get the current value

getCellFromPixel(position[, useOffset])

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 left properties
• useOffset - if true, value will be based on offset vs position (Optional. Default false). Useful when grid is within position: relative element.

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

isAreaEmpty(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.

makeWidget(el)

If you add elements to your gridstack container by hand, you have to tell gridstack afterwards to make them widgets. If you want gridstack to add the elements for you, use addWidget instead. Makes the given element a widget and returns it.

Parameters:

• el - element to convert to a widget

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

$('.grid-stack').append('<div id="gsi-1" data-gs-x="0" data-gs-y="0" data-gs-width="3" data-gs-height="2" data-gs-auto-position="true"></div>')
var grid = $('.grid-stack').data('gridstack');
grid.makeWidget('gsi-1');

maxHeight(el, val)

Set the maxHeight for a widget.

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

minHeight(el, val)

Set the minHeight for a widget.

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

maxWidth(el, val)

Set the maxWidth for a widget.

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

minWidth(el, val)

Set the minWidth for a widget.

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

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.

removeWidget(el[, detachNode])

Removes widget from the grid.

Parameters:

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

removeAll([detachNode])

Removes all widgets from the grid.

Parameters:

• detachNode - if false nodes won't be removed from the DOM (Optional. Default true).

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.

setAnimation(doAnimate)

Toggle the grid animation state. Toggles the grid-stack-animate class.

• doAnimate - if true the grid will animate.

setColumn(column, doNotPropagate)

Modify number of columns in the grid. Will update existing widgets to conform to new number of columns, as well as cache the original layout so you can revert back to previous positions without loss. Requires gridstack-extra.css or gridstack-extra.min.css for [1-11], else you will need to generate correct CSS (see https://github.com/gridstack/gridstack.js#change-grid-columns)

• column - Integer > 0 (default 12).
• doNotPropagate - if true existing widgets will not be updated.

setStatic(staticValue)

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

• staticValue - if true the grid becomes 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.

verticalMargin()

returns current vertical margin value.

verticalMargin(value, noUpdate)

Parameters:

• value - new vertical margin value.
• noUpdate - if true, styles will not be updated.

willItFit(x, y, width, height, autoPosition)

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.willItFit(newNode.x, newNode.y, newNode.width, newNode.height, true)) {
  grid.addWidget(newNode.el, newNode.x, newNode.y, newNode.width, newNode.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).