Component: ojMasonryLayout

Oracle® JavaScript Extension Toolkit (JET)
3.2.0

E87541-01

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Sub-ID's

oj. ojMasonryLayout extends oj.baseComponent

Version:
  • 3.2.0
Since:
  • 1.1.0

JET MasonryLayout Component

Description: A grid of tiles.

A JET MasonryLayout can be created from any <div> element that contains multiple direct child <div> elements that can be sized and positioned.

Each direct child element must be styled using one of the predefined oj-masonrylayout-tile-CxR style classes to specify the size of that tile. A tile can span multiple columns and/or rows. The predefined size style classes are:

Class Description
oj-masonrylayout-tile-1x1 A tile that spans 1 column and 1 row.
oj-masonrylayout-tile-1x2 A tile that spans 1 column and 2 rows.
oj-masonrylayout-tile-1x3 A tile that spans 1 column and 3 rows.
oj-masonrylayout-tile-2x1 A tile that spans 2 columns and 1 row.
oj-masonrylayout-tile-2x2 A tile that spans 2 columns and 2 rows.
oj-masonrylayout-tile-2x3 A tile that spans 2 columns and 3 rows.
oj-masonrylayout-tile-3x1 A tile that spans 3 columns and 1 row.
oj-masonrylayout-tile-3x2 A tile that spans 3 columns and 2 rows.

The number of columns in the layout is determined by the width of the component and the width of a 1x1 tile. The number of rows is determined by the number of columns and the number and sizes of tiles to be laid out. When the component is resized, relayout will occur and the number of columns and rows may change.

When performing layout, tiles are processed in the order in which they originally appeared in the DOM. Cells in the grid are processed in left-to-right, top-to-bottom order (or right-to-left, top-to-bottom order when the reading direction is right-to-left). A tile will be positioned in the first empty cell in which it fits. This can result in empty cells in the layout. Subsequent tiles may fill those earlier gaps if they fit.


<div id="masonryLayout" data-bind="ojComponent: {component: 'ojMasonryLayout'}">
  <div id="tile1" class="oj-masonrylayout-tile-1x1">Alpha</div>
  <div id="tile2" class="oj-masonrylayout-tile-1x1">Beta</div>
  <div id="tile3" class="oj-masonrylayout-tile-1x1">Gamma</div>
  <div id="tile4" class="oj-masonrylayout-tile-1x1">Delta</div>
  <div id="tile5" class="oj-masonrylayout-tile-1x1">Epsilon</div>
  <div id="tile6" class="oj-masonrylayout-tile-1x1">Zeta</div>
</div>

Touch End User Information

MasonryLayout is for layout only and does not directly support touch interaction. It is up to the application to provide touch support.

Keyboard End User Information

MasonryLayout is for layout only and does not directly support keyboard interaction. It is up to the application to provide keyboard support.

Keyboard Application Developer Information

Providing keyboard support for the tiles in the masonry layout is the responsibility of the application developer, if the tiles do not already support keyboard interaction. This could be done, for example, by specifying tabindex on each tile to enable tab navigation. Alternatively, this could be done by adding a keyboard listener and responding to key events, like pressing the arrow keys.

Accessibility

MasonryLayout is for layout only. It is the responsibility of the application developer to make the tiles in the layout accessible. Sighted keyboard-only users need to be able to access the tiles in the layout just by using the keyboard. It is up to the child tiles of the MasonryLayout to support keyboard navigation. The MasonryLayout reorders the tile DOM elements to match the visual layout order so that tab order and screen reader reading order will match the visual layout order.

Reading direction

As with any JET component, in the unusual case that the directionality (LTR or RTL) changes post-init, the MasonryLayout must be refresh()ed.

Pseudo-selectors

The :oj-masonrylayout pseudo-selector can be used in jQuery expressions to select JET MasonryLayout. For example:

$( ":oj-masonrylayout" ) // selects all JET MasonryLayouts on the page
$myEventTarget.closest( ":oj-masonrylayout" ) // selects the closest ancestor that is a JET MasonryLayout

JET for jQuery UI developers

Event names for all JET components are prefixed with "oj", instead of component-specific prefixes like "masonryLayout".

Initializer

.ojMasonryLayout()

Creates a JET MasonryLayout.
Source:
Examples

Initialize the MasonryLayout with no options specified:

$( ".selector" ).ojMasonryLayout();

Initialize the MasonryLayout with some options specified:

$( ".selector" ).ojMasonryLayout( { "reorderHandle": ".appReorderHandle" } );

Initialize the MasonryLayout via the JET ojComponent binding:

<div id="masonryLayout" data-bind="ojComponent: { component: 'ojMasonryLayout', reorderHandle: '.appReorderHandle'}">

Options

contextMenu :Element|Array.<Element>|string|jQuery|NodeList

Identifies the JET Menu that the component should launch as a context menu on right-click, Shift-F10, Press & Hold, or component-specific gesture. If specified, the browser's native context menu will be replaced by the specified JET Menu.

The value can be an HTML element, JQ selector, JQ object, NodeList, or array of elements. In all cases, the first indicated element is used.

To specify a JET context menu on a DOM element that is not a JET component, see the ojContextMenu binding.

To make the page semantically accurate from the outset, applications are encouraged to specify the context menu via the standard HTML5 syntax shown in the below example. When the component is initialized, the context menu thus specified will be set on the component.

The JET Menu should be initialized before the MasonryLayout using it as a context menu.

After create time, the contextMenu option should be set via this API, not by setting the DOM attribute.

The application can register a listener for the Menu's beforeOpen event. The listener can cancel the launch via event.preventDefault(), or it can customize the menu contents by editing the menu DOM directly, and then calling refresh() on the Menu.

To help determine whether it's appropriate to cancel the launch or customize the menu, the beforeOpen listener can use component API's to determine which table cell, chart item, etc., is the target of the context menu. See the JSDoc and demos of the individual components for details. Keep in mind that any such logic must work whether the context menu was launched via right-click, Shift-F10, Press & Hold, or component-specific touch gesture.

When defining a contextMenu, ojMasonryLayout will provide built-in behavior for "cut" and "paste" if the following format for menu <li> items is used (no <a> elements are required):

  • <li data-oj-command="oj-masonrylayout-cut" />
  • <li data-oj-command="oj-masonrylayout-paste-before" />
  • <li data-oj-command="oj-masonrylayout-paste-after" />
The available translated text will be applied to menu items defined this way.
Default Value:
  • null
Source:
Examples

Initialize a JET MasonryLayout with a context menu:

// via recommended HTML5 syntax:
<div id="myMasonryLayout" contextmenu="myContextMenu" data-bind="ojComponent: { ... }>

// via JET initializer (less preferred) :
$( ".selector" ).ojMasonryLayout({ "contextMenu": "#myContextMenu"  ... } });

Get or set the contextMenu option for an ojMasonryLayout after initialization:

// getter
var menu = $( ".selector" ).ojMasonryLayout( "option", "contextMenu" );

// setter
$( ".selector" ).ojMasonryLayout( "option", "contextMenu", "#myContextMenu" );

disabled :boolean

MasonryLayout inherits the disabled option from its superclass, but does not support it in order to avoid tight coupling between a MasonryLayout and its contents. Setting this option on MasonryLayout has no effect.

WARNING: Applications should not depend on this behavior because we reserve the right to change it in the future in order to support disabled and propagate it to child components of MasonryLayout.

Default Value:
  • false
Source:

reorderHandle :string

Specify the string jQuery selector of the descendant DOM element in a masonryLayout child that can be used to reorder the child by drag-and-drop.

This option is null by default, meaning that masonryLayout children cannot be reordered. If each child that can be reordered has an element with style class 'my-reorder-handle', then reorderHandle would be specified as '.my-reorder-handle'.

When specifying a reorderHandle, the application should also specify a context menu with actions to cut and paste tiles as an accessible alternative to drag-and-drop reordering.

Default Value:
  • null
Source:
See:
Examples

Initialize the masonryLayout with the reorderHandle option specified:

// HTML
<div>                              // masonryLayout DOM element
  <div id="child1">                  // child DOM element
    <div class="my-reorder-handle"/>   // reorder handle
  </div>
  <div id="child2">                  // child DOM element
    <div class="my-reorder-handle"/>   // reorder handle
  </div>
  <div id="child3">                  // child DOM element
    <div class="my-reorder-handle"/>   // reorder handle
  </div>
  <div id="child4">                  // child DOM element
    <div class="my-reorder-handle"/>   // reorder handle
  </div>
  <div id="child5">                  // child DOM element
    <div class="my-reorder-handle"/>   // reorder handle
  </div>
</div>

// JS
$( ".selector" ).ojMasonryLayout( { "reorderHandle": ".my-reorder-handle" } );

Get or set the reorderHandle option after initialization:

// getter
var contentParent = $( ".selector" ).ojMasonryLayout( "option", "reorderHandle" );

// setter
$( ".selector" ).ojMasonryLayout( "option", "reorderHandle", ".my-reorder-handle" );

rootAttributes :Object

Attributes specified here will be set on the component's root DOM element at creation time. This is particularly useful for components like Dialog that wrap themselves in a new root element at creation time.

The supported attributes are id, which overwrites any existing value, and class and style, which are appended to the current class and style, if any.

Setting this option after component creation has no effect. At that time, the root element already exists, and can be accessed directly via the widget method, per the second example below.

Default Value:
  • null
Inherited From:
Source:
Examples

Initialize a JET component, specifying a set of attributes to be set on the component's root DOM element:

// Foo is the component, e.g., Menu, Button, InputText, InputNumber, Select, etc.
$( ".selector" ).ojFoo({ "rootAttributes": {
  "id": "myId",
  "style": "max-width:100%; color:blue;",
  "class": "my-class"
}});

After initialization, rootAttributes should not be used. It is not needed at that time, as attributes of the root DOM element can simply be set directly, using widget:

// Foo is the component, e.g., Menu, Button, InputText, InputNumber, Select, etc.
$( ".selector" ).ojFoo( "widget" ).css( "height", "100px" );
$( ".selector" ).ojFoo( "widget" ).addClass( "my-class" );

translations :Object

A collection of translated resources from the translation bundle, or null if this component has no resources. Resources may be accessed and overridden individually or collectively, as seen in the examples.

If this component has (or inherits) translations, their documentation immediately follows this doc entry.

Default Value:
  • an object containing all resources relevant to the component and all its superclasses, or null if none
Inherited From:
Source:
Examples

Initialize the component, overriding some translated resources. This syntax leaves the other translations intact at create time, but not if called after create time:

// Foo is InputDate, InputNumber, etc.
$( ".selector" ).ojFoo({ "translations": { someKey: "someValue",
                                           someOtherKey: "someOtherValue" } });

Get or set the translations option, after initialization:

// Get one.  (Foo is InputDate, InputNumber, etc.)
var value = $( ".selector" ).ojFoo( "option", "translations.someResourceKey" );

// Get all.  (Foo is InputDate, InputNumber, etc.)
var values = $( ".selector" ).ojFoo( "option", "translations" );

// Set one, leaving the others intact.  (Foo is InputDate, InputNumber, etc.)
$( ".selector" ).ojFoo( "option", "translations.someResourceKey", "someValue" );

// Set many.  Any existing resource keys not listed are lost.  (Foo is InputDate, InputNumber, etc.)
$( ".selector" ).ojFoo( "option", "translations", { someKey: "someValue",
                                                    someOtherKey: "someOtherValue" } );

translations.labelCut :string

Context menu text used for cutting a tile.

See the translations option for usage examples.

Default Value:
  • "Cut"
Since:
  • 1.1.0
Source:

translations.labelPasteAfter :string

Context menu text used for pasting a tile after another tile.

See the translations option for usage examples.

Default Value:
  • "Paste After"
Since:
  • 1.1.0
Source:

translations.labelPasteBefore :string

Context menu text used for pasting a tile before another tile.

See the translations option for usage examples.

Default Value:
  • "Paste Before"
Since:
  • 1.1.0
Source:

Sub-ID's

Each subId locator object contains, at minimum, a subId property, whose value is a string that identifies a particular DOM node in this component. It can have additional properties to further specify the desired node. See getNodeBySubId and getSubIdByNode methods for more details.

Properties:
Name Type Description
subId string Sub-id string to identify a particular dom node.

Following are the valid subIds:

None

This component does not expose any subIds.

Source:

Events

beforeInsert

Triggered immediately before a tile is inserted. The beforeInsert can be cancelled by calling event.preventDefault().
Properties:
Name Type Description
event Event jQuery event object
ui Object Parameters
Properties
Name Type Description
tile jQuery The tile that is about to be inserted.
index number The 0-based index into the set of rendered masonryLayout children where the tile will be inserted.
Source:
Examples

Initialize the masonryLayout with the beforeInsert callback specified:

$( ".selector" ).ojMasonryLayout({
    "beforeInsert": function( event, ui ) {}
});

Bind an event listener to the ojbeforeinsert event:

$( ".selector" ).on( "ojbeforeinsert", function( event, ui ) {} );

beforeRemove

Triggered immediately before a tile is removed. The beforeRemove can be cancelled by calling event.preventDefault().
Properties:
Name Type Description
event Event jQuery event object
ui Object Parameters
Properties
Name Type Description
tile jQuery The tile that will be removed.
Source:
Examples

Initialize the masonryLayout with the beforeRemove callback specified:

$( ".selector" ).ojMasonryLayout({
    "beforeRemove": function( event, ui ) {}
});

Bind an event listener to the ojbeforeremove event:

$( ".selector" ).on( "ojbeforeremove", function( event, ui ) {} );

beforeReorder

Triggered immediately before a tile is reordered. The beforeReorder can be cancelled by calling event.preventDefault().
Properties:
Name Type Description
event Event jQuery event object
ui Object Parameters
Properties
Name Type Description
tile jQuery The tile that will be reordered.
fromIndex number The 0-based index into the set of rendered masonryLayout children from which the tile will be reordered.
Source:
Examples

Initialize the masonryLayout with the beforeReorder callback specified:

$( ".selector" ).ojMasonryLayout({
    "beforeReorder": function( event, ui ) {}
});

Bind an event listener to the ojbeforereorder event:

$( ".selector" ).on( "ojbeforereorder", function( event, ui ) {} );

beforeResize

Triggered immediately before a tile is resized. The beforeResize can be cancelled by calling event.preventDefault().
Properties:
Name Type Description
event Event jQuery event object
ui Object Parameters
Properties
Name Type Description
tile jQuery The tile that will be resized.
previousSizeStyleClass string The previous size style class applied to the tile.
sizeStyleClass string The new size style class that will be applied to the tile.
Source:
Examples

Initialize the masonryLayout with the beforeResize callback specified:

$( ".selector" ).ojMasonryLayout({
    "beforeResize": function( event, ui ) {}
});

Bind an event listener to the ojbeforeresize event:

$( ".selector" ).on( "ojbeforeresize", function( event, ui ) {} );

create

Triggered when the masonryLayout is created.
Properties:
Name Type Description
event Event jQuery event object
ui Object Currently empty
Source:
Examples

Initialize the masonryLayout with the create callback specified:

$( ".selector" ).ojMasonryLayout({
    "create": function( event, ui ) {}
});

Bind an event listener to the ojcreate event:

$( ".selector" ).on( "ojcreate", function( event, ui ) {} );

destroy

Triggered before the component is destroyed. This event cannot be canceled; the component will always be destroyed regardless.

Inherited From:
Source:
Examples

Initialize component with the destroy callback

// Foo is Button, InputText, etc.
$(".selector").ojFoo({
  'destroy': function (event, data) {}
});

Bind an event listener to the destroy event

$(".selector").on({
  'ojdestroy': function (event, data) {
      // verify that the component firing the event is a component of interest
      if ($(event.target).is(".mySelector")) {
          window.console.log("The DOM node id for the destroyed component is : %s", event.target.id);
      }
  };
});

insert

Triggered immediately after a tile is inserted.
Properties:
Name Type Description
event Event jQuery event object
ui Object Parameters
Properties
Name Type Description
tile jQuery The tile that was inserted.
index number The 0-based index into the set of rendered masonryLayout children where the tile was inserted.
Source:
Examples

Initialize the masonryLayout with the insert callback specified:

$( ".selector" ).ojMasonryLayout({
    "insert": function( event, ui ) {}
});

Bind an event listener to the ojinsert event:

$( ".selector" ).on( "ojinsert", function( event, ui ) {} );

optionChange

Fired whenever a supported component option changes, whether due to user interaction or programmatic intervention. If the new value is the same as the previous value, no event will be fired. The event listener will receive two parameters described below:
Properties:
Name Type Description
event Event jQuery event object
ui Object event payload
Properties
Name Type Argument Description
option string the name of the option that changed.
previousValue Object an Object holding the previous value of the option. When previousValue is not a primitive type, i.e., is an Object, it may hold the same value as the value property.
value Object an Object holding the current value of the option.
subproperty Object <nullable>
an Object holding information about the subproperty that changed.
Properties
Name Type Description
path string the subproperty path that changed.
previousValue Object an Object holding the previous value of the subproperty.
value Object an Object holding the current value of the subproperty.
optionMetadata Object information about the option that changed
Properties
Name Type Description
writeback string "shouldWrite" or "shouldNotWrite". For use by the JET writeback mechanism; 'shouldWrite' indicates that the value should be written to the observable.
Inherited From:
Source:
Examples

Initialize component with the optionChange callback

// Foo is Button, InputText, etc.
$(".selector").ojFoo({
  'optionChange': function (event, ui) {}
});

Bind an event listener to the ojoptionchange event

$(".selector").on({
  'ojoptionchange': function (event, ui) {
      // verify that the component firing the event is a component of interest
      if ($(event.target).is(".mySelector")) {
          window.console.log("option that changed is: " + ui['option']);
      }
  };
});

remove

Triggered immediately after a tile is removed.
Properties:
Name Type Description
event Event jQuery event object
ui Object Parameters
Properties
Name Type Description
tile jQuery The tile that was removed.
Source:
Examples

Initialize the masonryLayout with the remove callback specified:

$( ".selector" ).ojMasonryLayout({
    "remove": function( event, ui ) {}
});

Bind an event listener to the ojremove event:

$( ".selector" ).on( "ojremove", function( event, ui ) {} );

reorder

Triggered immediately after a tile is reordered.
Properties:
Name Type Description
event Event jQuery event object
ui Object Parameters
Properties
Name Type Description
tile jQuery The tile that was reordered.
fromIndex number The 0-based index into the set of rendered masonryLayout children from which the tile was reordered.
toIndex number The 0-based index into the set of rendered masonryLayout children to which the tile was reordered.
Source:
Examples

Initialize the masonryLayout with the reorder callback specified:

$( ".selector" ).ojMasonryLayout({
    "reorder": function( event, ui ) {}
});

Bind an event listener to the ojreorder event:

$( ".selector" ).on( "ojreorder", function( event, ui ) {} );

resize

Triggered immediately after a tile is resized.
Properties:
Name Type Description
event Event jQuery event object
ui Object Parameters
Properties
Name Type Description
tile jQuery The tile that was resized.
previousSizeStyleClass string The previous size style class applied to the tile.
sizeStyleClass string The new size style class applied to the tile.
Source:
Examples

Initialize the masonryLayout with the resize callback specified:

$( ".selector" ).ojMasonryLayout({
    "resize": function( event, ui ) {}
});

Bind an event listener to the ojresize event:

$( ".selector" ).on( "ojresize", function( event, ui ) {} );

Methods

getNodeBySubId(locator) → {Element|null}

Returns the component DOM node indicated by the locator parameter.

If the locator or its subId is null, then this method returns the element on which this component was initialized.

If a non-null subId is provided but no corresponding node can be located, then this method returns null.

This method is intended for use in test automation only, and should not be used in a production environment.

Parameters:
Name Type Description
locator Object An Object containing, at minimum, a subId property, whose value is a string that identifies a particular DOM node in this component.

If this component has (or inherits) any subIds, then they are documented in the Sub-ID's section of this document.

Some components may support additional fields of the locator Object, to further specify the desired node.

Inherited From:
Source:
Returns:
The DOM node located by the locator, or null if none is found.
Type
Element | null
Example

Get the node for a certain subId:

// Foo is ojInputNumber, ojInputDate, etc.
var node = $( ".selector" ).ojFoo( "getNodeBySubId", {'subId': 'oj-some-sub-id'} );

getSubIdByNode(node) → {Object|null}

Returns the subId string for the given DOM node in this component. For details, see getNodeBySubId and the Sub-ID's section of this document.

This method is intended for use in test automation only, and should not be used in a production environment.

Parameters:
Name Type Description
node Element DOM node in this component
Inherited From:
Source:
Returns:
The subId for the DOM node, or null if none is found.
Type
Object | null
Example

Get the subId for a certain DOM node:

// Foo is ojInputNumber, ojInputDate, etc.
var locator = $( ".selector" ).ojFoo( "getSubIdByNode", nodeInsideComponent );

insertTile(selector, index)

Insert a tile into the masonryLayout.
Parameters:
Name Type Description
selector string Selector identifying the tile to insert. The tile does not need to be a child of the masonryLayout when this method is called. This method will reparent the tile to the masonryLayout.
index number The 0-based index into the set of rendered masonryLayout children where the tile will be inserted.
Source:
Returns:
When called via the public jQuery syntax, this method returns the object on which it was called, to facilitate method chaining.
Example

Invoke the insertTile method:

$( ".selector" ).ojMasonryLayout( "insertTile", "#tileSelector", 2 );

option(optionName, value) → {Object|undefined}

This method has several overloads, which get and set component options and their fields. The functionality is unchanged from that provided by JQUI. See the examples for details on each overload.

Parameters:
Name Type Argument Description
optionName string | Object <optional>
the option name (string, first two overloads), or the map (Object, last overload). Omitted in the third overload.
value Object <optional>
a value to set for the option. Second overload only.
Inherited From:
Source:
Returns:
The getter overloads return the retrieved value(s). When called via the public jQuery syntax, the setter overloads return the object on which they were called, to facilitate method chaining.
Type
Object | undefined
Examples

First overload: get one option:

This overload accepts a (possibly dot-separated) optionName param as a string, and returns the current value of that option.

var isDisabled = $( ".selector" ).ojFoo( "option", "disabled" ); // Foo is Button, Menu, etc.

// For object-valued options, dot notation can be used to get the value of a field or nested field.
var startIcon = $( ".selector" ).ojButton( "option", "icons.start" ); // icons is object with "start" field

Second overload: set one option:

This overload accepts two params: a (possibly dot-separated) optionName string, and a new value to which that option will be set.

$( ".selector" ).ojFoo( "option", "disabled", true ); // Foo is Button, Menu, etc.

// For object-valued options, dot notation can be used to set the value
// of a field or nested field, without altering the rest of the object.
$( ".selector" ).ojButton( "option", "icons.start", myStartIcon ); // icons is object with "start" field

Third overload: get all options:

This overload accepts no params, and returns a map of key/value pairs representing all the component options and their values.

var options = $( ".selector" ).ojFoo( "option" ); // Foo is Button, Menu, etc.

Fourth overload: set one or more options:

This overload accepts a single map of option-value pairs to set on the component. Unlike the first two overloads, dot notation cannot be used.

$( ".selector" ).ojFoo( "option", { disabled: true, bar: 42 } ); // Foo is Button, Menu, etc.

refresh()

Refreshes the visual state of the masonryLayout. JET components require a refresh() or re-init after the DOM is programmatically changed underneath the component.

This method does not accept any arguments.

Source:
Returns:
When called via the public jQuery syntax, this method returns the object on which it was called, to facilitate method chaining.
Example

Invoke the refresh method:

$( ".selector" ).ojMasonryLayout( "refresh" );

removeTile(selector)

Remove a tile from the masonryLayout.
Parameters:
Name Type Description
selector string Selector identifying the tile to remove.
Source:
Returns:
When called via the public jQuery syntax, this method returns the object on which it was called, to facilitate method chaining.
Example

Invoke the removeTile method:

$( ".selector" ).ojMasonryLayout( "removeTile", "#tileSelector" );

resizeTile(selector, sizeStyleClass)

Resize a tile in the masonryLayout.
Parameters:
Name Type Description
selector string Selector identifying the tile to resize.
sizeStyleClass string New size style class to apply to the tile.
Source:
Returns:
When called via the public jQuery syntax, this method returns the object on which it was called, to facilitate method chaining.
Example

Invoke the resizeTile method:

$( ".selector" ).ojMasonryLayout( "resizeTile", "#tileSelector", "oj-masonrylayout-tile-2x1" );

Non-public Methods

Note: Extending JET components is not currently supported. Thus, non-public methods are for internal use only.

<protected> _AddActiveable(options)

Add touch and mouse listeners to toggle oj-active class
Parameters:
Name Type Description
options !Object | !jQuery This parameter can either be the element (convenience syntax for callers needing to specify only the element(s) that would otherwise have been passed as options.element) or an object supporting the following fields:
Properties
Name Type Argument Description
element jQuery The element(s) to receive the oj-active class on active Required if afterToggle is specified.
afterToggle function(string) <nullable>
Optional callback function called each time the active classes have been toggled, after the toggle. The event.type string is passed and indicates whether the classes were added or removed. The active classes are added on "touchstart" or "mousedown" or "mouseenter" and the active classes are removed on "touchend" or "touchcancel" or "mouseup" or "mouseleave". Components with consistency requirements, such as "oj-default must be applied iff no state classes such as oj-active are applied," can enforce those rules in this callback.
Inherited From:
Source:
See:

<protected> _AddHoverable(options)

Add mouse listners to toggle oj-hover class
Parameters:
Name Type Description
options !Object | !jQuery This param can either be the element (convenience syntax for callers needing to specify only the element(s) that would otherwise have been passed as options.element) or an object supporting the following fields:
Properties
Name Type Argument Description
element jQuery The element(s) to receive the oj-hover class on hover Required if afterToggle is specified.
afterToggle function(string) <nullable>
Optional callback function called each time the hover classes have been toggled, after the toggle. The string "mouseenter" or "mouseleave" is passed, indicating whether the classes were added or removed. Components with consistency requirements, such as "oj-default must be applied iff no state classes such as oj-hover are applied," can enforce those rules in this callback.
Inherited From:
Source:
See:

<protected> _AfterCreate()

This method is called after _ComponentCreate, but before the create event is fired. The JET base component does tasks here that must happen after the component (subclass) has created itself in its override of _ComponentCreate. Notably, the base component handles the rootAttributes and contextMenu options here, since those options operate on the component root node, which for some components is created in their override of _ComponentCreate.

Subclasses should override this method only if they have tasks that must happen after a superclass's implementation of this method, e.g. tasks that must happen after the context menu is set on the component.

Overrides of this method should call this._super first.

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<protected> _AfterCreateEvent()

This method is called after the create event is fired. Components usually should not override this method, as it is rarely correct to wait until after the create event to perform a create-time task.

An example of a correct usage of this method is Dialog's auto-open behavior, which needs to happen after the create event.

Only behaviors (like Dialog auto-open behavior) should occur in this method. Component initialization must occur earlier, before the create event is fired, so that create listeners see a fully inited component.

Overrides of this method should call this._super first.

Do not confuse this method with the _AfterCreate method, which is more commonly used.

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<protected> _CompareOptionValues(option, value1, value2) → {boolean}

Compares 2 option values for equality and returns true if they are equal; false otherwise.

Parameters:
Name Type Description
option String the name of the option
value1 Object first value
value2 Object another value
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Returns:
Type
boolean

<protected> _ComponentCreate()

After _ComponentCreate and _AfterCreate, the widget should be 100% set up. this._super should be called first.
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<protected> _create()

This method is final in JET. Components should instead override one or more of the overridable create-time methods listed in _ComponentCreate.

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<protected> _destroy()

Destroy the masonryLayout.
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<protected> _FixRendererContext(context) → {Object}

Prepares a custom renderer context object for either the JQuery or custom element syntax, removing and exposing keys as needed.
Parameters:
Name Type Description
context Object The renderer context object.
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Returns:
The cleaned up renderer context.
Type
Object

<protected> _focusable(options)

Sets JET's "focus" CSS classes when the element is focused and removes them when focus is lost.

The oj-focus class is set on all focuses.

Some components additionally have an oj-focus-highlight class, which applies a focus indicator that is appropriate on a subset of the occasions that oj-focus is appropriate. Those components should pass true for the applyHighlight param, in which case the oj-focus-highlight class is set if appropriate given the current focus highlight policy.

Focus highlight policy

The focus highlight policy supports the 3 values listed below. By default, it is retrieved from the $focusHighlightPolicy SASS variable, shared by many components and patterns. Components with different needs, including those exposing a component-specific SASS variable or other API for this, should see the getFocusHighlightPolicy parameter below. Valid focus highlight policies:

Policy Description
"nonPointer" Indicates that the component should apply the oj-focus-highlight class only for focuses not resulting from pointer (touch or mouse) interaction. (In the built-in themes, the SASS variable defaults to this value.)
"all" Indicates that the component should apply the class for all focuses.
"none" Indicates that the component should never apply the class, because the application has taken responsibility for applying the class when needed for accessibility.
Toggling the classes

Components that toggle these focus classes outside of this API must maintain the invariant that oj-focus-highlight is applied to a given element in a (not necessarily strict) subset of cases that oj-focus is applied to that element.

Typically the specified element should be within the component subtree, in which case the classes will automatically be removed from the element when the component is destroyed, when its disabled option is set to true, and when _NotifyDetached() is called.

As a minor exception, for components that wrap themselves in a new root node at create time, if the specified element is within the root node's subtree but not within the init node's subtree, then at destroy time only, the classes will not be removed, since destroy() is expected to remove such nodes.

If the element is NOT in the component subtree, then the caller is responsible for removing the classes at the times listed above.

Listeners

If setupHandlers is not passed, or if setupHandlers is passed and uses _on to register its listeners as seen in the example, then the listeners are not invoked when the component is disabled, and the listeners are automatically cleaned up when the component is destroyed. Otherwise, the caller is responsible for ensuring that the disabled state is handled correctly, and removing the listeners at destroy time.

Related API's

Non-component internal callers should see oj.DomUtils.makeFocusable(). Per its JSDoc (unpublished; see the source), it has a couple of additional usage considerations.

Parameters:
Name Type Description
options !Object | !jQuery This param can either be the element (convenience syntax for callers needing to specify only the element(s) that would otherwise have been passed as options.element) or an object supporting the following fields:
Properties
Name Type Argument Description
element jQuery The element(s) to receive the oj-focus classes on focus. Required if setupHandlers not passed; ignored otherwise.
applyHighlight boolean true if the oj-focus-highlight class should be applied when appropriate. false or omitted if that class should never be applied.
afterToggle function(string) <nullable>
Optional callback function called each time the focus classes have been toggled, after the toggle. The string "focusin" or "focusout" is passed, indicating whether the classes were added or removed. Components with consistency requirements, such as "oj-default must be applied iff no state classes such as oj-focus are applied," can enforce those rules in this callback.
getFocusHighlightPolicy function() <nullable>
Optional if applyHighlight is true; ignored otherwise. Components with a component-specific focus policy mechanism should pass a function that always returns one of the three valid values listed above, keeping in mind that this method can be called on every focus. See the example.
recentPointer function() <nullable>
Relevant iff applyHighlight is true and the focus highlight policy is "nonPointer"; ignored otherwise. Recent pointer activity is considered to have occurred if (a) a mouse button or finger has recently been down or up, or (b) this optional callback function returns true. Components wishing to additionally take into account (say) recent pointer movements can supply a function returning true if those movements have been detected, keeping in mind that this method can be called on every focus. See the example.
setupHandlers function(function(!jQuery),function(!jQuery)) <nullable>
Can be omitted by components whose focus classes need to be added and removed on focusin and focusout, respectively. Components needing to add/remove those classes in response to other events should specify this parameter, which is called once, immediately. See the examples.
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Examples

Opt into the highlight behavior, and specify a function to be called every time the classes are toggled:

var self = this;
this._focusable({
    'element': this.element, 
    'applyHighlight': true, 
    'afterToggle' : function() {
        self._toggleDefaultClasses();
    }
});

Arrange for mouse movement to be considered in addition to mouse/finger up/down. Also supply a component-specific focusHighlightPolicy:

var self = this;
this._focusable({
    'element': someElement, 
    'applyHighlight': true, 
    'recentPointer' : function() {
        // A timestamp-based approach avoids the risk of getting stuck in an inaccessible 
        // state if (say) mouseenter is not followed by mouseleave for some reason.
        var millisSincePointerMove = Date.now() - _myPointerMoveTimestamp;
        var isRecent = millisSincePointerMove < myThreshold;
        return isRecent;
    },
    'getFocusHighlightPolicy' : function() {
        // Return the value of a component-specific SASS $variable, component option, or other 
        // component-specific mechanism, either "all", "none", or "nonPointer".  SASS variables
        // should be pulled into JS once statically on load, not per-instance or per-focus.
    }
});

Add/remove the focus classes in response to events other than focusin/focusout:

var self = this;
this._focusable({
    'applyHighlight': myBooleanValue, 
    'setupHandlers': function( focusInHandler, focusOutHandler) {
        self._on( self.element, {
            // This example uses focus/blur listeners, which don't bubble, rather than the 
            // default focusin/focusout (which bubble).  This is useful when one focusable  
            // element is a descendant of another.
            focus: function( event ) {
                focusInHandler($( event.currentTarget ));
            },
            blur: function( event ) {
                focusOutHandler($( event.currentTarget ));
            }
        });
    }
});

Alternate usage of setupHandlers, which simply stashes the handlers so they can be called from the component's existing handlers:

var self = this;
this._focusable({
    'applyHighlight': myBooleanValue, 
    'setupHandlers': function( focusInHandler, focusOutHandler) {
        self._focusInHandler = focusInHandler;
        self._focusOutHandler = focusOutHandler;
    }
});

<protected> _getCreateOptions()

This method is not used in JET. Components should instead override _InitOptions.

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<protected> _GetEventForSyntax(event) → {Object}

Given an event, returns the appropriate event for the component syntax. For custom elements, if the event is a JQuery event, this method will return the unwrapped original event.
Parameters:
Name Type Description
event Object [description]
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Returns:
Type
Object

<protected> _GetReadingDirection() → {string}

Determines whether the component is LTR or RTL.

Component responsibilities:

  • All components must determine directionality exclusively by calling this protected superclass method. (So that any future updates to the logic can be made in this one place.)
  • Components that need to know the directionality must call this method at create-time and from refresh(), and cache the value.
  • Components should not call this at other times, and should instead use the cached value. (This avoids constant DOM queries, and avoids any future issues with component reparenting (i.e. popups) if support for directional islands is added.)

App responsibilities:

  • The app specifies directionality by setting the HTML "dir" attribute on the <html> node. When omitted, the default is "ltr". (Per-component directionality / directional islands are not currently supported due to inadequate CSS support.)
  • As with any DOM change, the app must refresh() the component if the directionality changes dynamically. (This provides a hook for component housekeeping, and allows caching.)
Default Value:
  • "ltr"
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Returns:
the reading direction, either "ltr" or "rtl"
Type
string

<protected> _GetSavedAttributes(element) → {Object|null}

Gets the saved attributes for the provided element.

If you don't override _SaveAttributes and _RestoreAttributes, then this will return null.

If you override _SaveAttributes to call _SaveAllAttributes, then this will return all the attributes. If you override _SaveAttributes/_RestoreAttributes to do your own thing, then you may also have to override _GetSavedAttributes to return whatever you saved if you need access to the saved attributes.

Parameters:
Name Type Description
element Object jQuery selection, should be a single entry
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Returns:
savedAttributes - attributes that were saved for this element in _SaveAttributes, or null if none were saved.
Type
Object | null

<protected> _init()

JET components should almost never implement this JQUI method. Please consult an architect if you believe you have an exception. Reasons:

  • This method is called at create time, after the create event is fired. It is rare for that to be the appropriate time to perform a create-time task. For those rare cases, we have the _AfterCreateEvent method, which is preferred over this method since it is called only at that time, not also at re-init time (see next).
  • This method is also called at "re-init" time, i.e. when the initializer is called after the component has already been created. JET has not yet identified any desired semantics for re-initing a component.
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<protected> _InitOptions(originalDefaults, constructorOptions)

This method is called before _ComponentCreate, at which point the component has not yet been rendered. Component options should be initialized in this method, so that their final values are in place when _ComponentCreate is called.

This includes getting option values from the DOM, where applicable, and coercing option values (however derived) to their appropriate data type if needed.

No work other than setting options should be done in this method. In particular, nothing should be set on the DOM until _ComponentCreate, e.g. setting the disabled DOM attribute from the disabled option.

A given option (like disabled) appears in the constructorOptions param iff the app set it in the constructor:

  • If it appears in constructorOptions, it should win over what's in the DOM (e.g. disabled DOM attribute). If for some reason you need to tweak the value that the app set, then enable writeback when doing so: this.option('foo', bar, {'_context': {writeback: true, internalSet: true}}).
  • If it doesn't appear in constructorOptions, then that option definitely is not bound, so writeback is not needed. So if you need to set the option (e.g. from a DOM attribute), use this.option('foo', bar, {'_context': {internalSet: true}}).

Overrides of this method should call this._super first.

Parameters:
Name Type Argument Description
originalDefaults Object original default options defined on the component and its ancestors
constructorOptions Object <nullable>
options passed into the widget constructor
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<protected> _IsCustomElement() → {boolean}

Determines whether the component is being rendered as a custom element.
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Returns:
True if the component is being rendered as a custom element
Type
boolean

<protected> _IsEffectivelyDisabled() → {boolean}

Determines whether this component is effectively disabled, i.e. it has its 'disabled' attribute set to true or it has been disabled by its ancestor component.

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Returns:
true if the component has been effectively disabled, false otherwise
Type
boolean

<protected> _NotifyAttached()

Notifies the component that its subtree has been connected to the document programmatically after the component has been created.
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<protected> _NotifyContextMenuGesture()

Notifies the component that its context menu is opening.
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<protected> _NotifyDetached()

Notifies the component that its subtree has been removed from the document programmatically after the component has been created.

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<protected> _NotifyDetached()

Notifies the component that its subtree has been removed from the document programmatically after the component has been created.

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<protected> _NotifyHidden()

Notifies the component that its subtree has been made hidden programmatically after the component has been created.

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<protected> _NotifyShown()

Notifies the component that its subtree has been made visible programmatically after the component has been created.
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<protected> _OpenContextMenu(event, eventType, openOptions, submenuOpenOptions, shallow)

The only correct way for a component to open its context menu is by calling this method, not by calling Menu.open() or _NotifyContextMenuGesture(). This method should be called in two cases:

  • This method is called by _NotifyContextMenuGesture() and its overrides. That method is called when the baseComponent detects the default context menu gestures: right-click, Press & Hold, and Shift-F10.
  • Components with UX-approved support for alternate context menu gestures like PressHoldRelease should call this method directly when those gestures are detected.

Components needing to customize how the context menu is launched, or do any per-launch setup, should do so in the caller of this method, (which is one of the two callers listed above), often by customizing the params passed to this method (_OpenContextMenu) per the guidance below. This setup should not be done in the following ways:

  • Components should not perform setup in a beforeOpen listener, as this can cause a race condition where behavior depends on who got their listener registered first: the component or the app. The only correct component use of a beforeOpen listener is when there's a need to detect whether something else launched the menu.
  • Components should not override this method (_OpenContextMenu), as this method is final. Instead, customize the params that are passed to it.

Guidance on setting OpenOptions fields:

Launcher:

Depending on individual component needs, any focusable element within the component can be the appropriate launcher for this launch.

Browser focus returns to the launcher on menu dismissal, so the launcher must at least be focusable. Typically a tabbable (not just focusable) element is safer, since it just focuses something the user could have focused on their own.

By default (i.e. if openOptions is not passed, or if it lacks a launcher field), the component init node is used as the launcher for this launch. If that is not focusable or is suboptimal for a given component, that component should pass something else. E.g. components with a "roving tabstop" (like Toolbar) should typically choose the current tabstop as their launcher.

The :focusable and :tabbable selectors may come in handy for choosing a launcher, e.g. something like this.widget().find(".my-class:tabbable").first().

Position:

By default, this method applies positioning that differs from Menu's default in the following ways: (The specific settings are subject to change.)

  • For mouse and touch events, the menu is positioned relative to the event, not the launcher.
  • For touch events, "my" is set to "start>40 center", to avoid having the context menu obscured by the user's finger.

Usually, if position needs to be customized at all, the only thing that needs changing is its "of" field, and only for keyboard launches (since mouse/touch launches should almost certainly keep the default "event" positioning). This situation arises anytime the element relative to which the menu should be positioned for keyboard launches is different than the launcher element (the element to which focus should be returned upon dismissal). For this case, { "position": {"of": eventType==="keyboard" ? someElement : "event"} } can be passed as the openOptions param.

Be careful not to clobber useful defaults by specifying too much. E.g. if you only want to customize "of", don't pass other fields like "my", since your value will be used for all modalities (mouse, touch, keyboard), replacing the modality-specific defaults that are usually correct. Likewise, don't forget the eventType==="keyboard" check if you only want to customize "of" for keyboard launches.

InitialFocus:

This method forces initialFocus to "menu" for this launch, so the caller needn't specify it.

Parameters:
Name Type Argument Description
event Event What triggered the context menu launch. Must be non-null.
eventType string "mouse", "touch", or "keyboard". Must be non-null. Passed explicitly since caller knows what it's listening for, and since events like contextmenu and click can be generated by various input modalities, making it potentially error-prone for this method to determine how they were generated.
openOptions Object <optional>
Options to merge with this method's defaults, which are discussed above. The result will be passed to Menu.open(). May be null or omitted. See also the shallow param.
submenuOpenOptions Object <optional>
Options to be passed through to Menu.open(). May be null or omitted.
shallow boolean <optional>
Whether to perform a deep or shallow merge of openOptions with this method's default value. The default and most commonly correct / useful value is false.
  • If true, a shallow merge is performed, meaning that the caller's position object, if passed, will completely replace this method's default position object.
  • If false or omitted, a deep merge is performed. For example, if the caller wishes to tweak position.of while keeping this method's defaults for position.my, position.at, etc., it can pass {"of": anOfValue} as the position value.

The shallow param is n/a for submenuOpenOptions, since this method doesn't apply any defaults to that. (It's a direct pass-through.)

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<protected> _ReleaseResources()

Release resources held by this component, for example, remove listeners. This is called during destroy. _SetupResources will set up resources needed by this component, and is called during _create.

This base class default implementation does nothing.

Component subclasses can opt in by overriding _SetupResources and _ReleaseResources.
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<protected> _RemoveActiveable(element)

Remove touch and mouse listeners that were registered in _AddActiveable
Parameters:
Name Type Description
element jQuery The same element passed to _AddActiveable
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<protected> _RemoveHoverable(element)

Remove mouse listners that were registered in _AddHoverable
Parameters:
Name Type Description
element jQuery The same element passed to _AddHoverable
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<protected> _RestoreAllAttributes()

Restores all the element's attributes which were saved in _SaveAllAttributes. This method is final in JET.

If a subclass wants to save/restore all attributes on create/destroy, then the subclass can override _SaveAttributes and call _SaveAllAttributes and also override _RestoreAttributes and call _RestoreAllAttributes.

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<protected> _RestoreAttributes()

Restore the attributes saved in _SaveAttributes.

_SaveAttributes is called during _create. And _RestoreAttributes is called during _destroy.

This base class default implementation does nothing.

We also have _SaveAllAttributes and _RestoreAllAttributes methods that save and restore all the attributes on an element. Component subclasses can opt into these _SaveAllAttributes/_RestoreAllAttributes implementations by overriding _SaveAttributes and _RestoreAttributes to call _SaveAllAttributes/_RestoreAllAttributes. If the subclass wants a different implementation (like save only the 'class' attribute), it can provide the implementation itself in _SaveAttributes/_GetSavedAttributes/_RestoreAttributes.

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<protected> _SaveAllAttributes(element)

Saves all the element's attributes within an internal variable. _RestoreAllAttributes will restore the attributes from this internal variable.

This method is final in JET. Subclasses can override _RestoreAttributes and call _RestoreAllAttributes.

The JSON variable will be held as:

[
  {
  "element" : element[i],
  "attributes" :
    {
      attributes[m]["name"] : {"attr": attributes[m]["value"]
    }
  }
]
Parameters:
Name Type Description
element Object jQuery selection to save attributes for
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<protected> _SaveAttributes(element)

Saves the element's attributes. This is called during _create. _RestoreAttributes will restore all these attributes and is called during _destroy.

This base class default implementation does nothing.

We also have _SaveAllAttributes and _RestoreAllAttributes methods that save and restore all the attributes on an element. Component subclasses can opt into these _SaveAllAttributes/_RestoreAllAttributes implementations by overriding _SaveAttributes and _RestoreAttributes to call _SaveAllAttributes/_RestoreAllAttributes. If the subclass wants a different implementation (like save only the 'class' attribute), it can provide the implementation itself in _SaveAttributes/_RestoreAttributes.

Parameters:
Name Type Description
element Object jQuery selection to save attributes for
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<protected> _setOption()

Set an option on the masonryLayout.
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<protected> _SetRootAttributes()

Reads the rootAttributes option, and sets the root attributes on the component's root DOM element. See rootAttributes for the set of supported attributes and how they are handled.

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Throws:
if unsupported attributes are supplied.

<protected> _SetupResources()

Sets up needed resources for this component, for example, add listeners. This is called during _create. _ReleaseResources will release resources help by this component, and is called during destroy.

This base class default implementation does nothing.

Component subclasses can opt in by overriding _SetupResources and _ReleaseResources.
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<protected> _UnregisterChildNode()

Remove all listener references that were attached to the element.
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