Class RapidContext.Widget.TextArea

.Widget.TextArea(attrs, …valueopt) → {Widget}

The text area widget class. Used to provide a text input field spanning multiple rows, using the <textarea> HTML element.

Constructor Summary
	`new TextArea(attrs, …valueopt) → {Widget}` Creates a new text area (or text box) widget.

Method Summary
	`addAll(…child)` Adds one or more children to this widget.
	`addChildNode(child)` Adds a single child DOM node to this widget.
	`addClass(…cls)` Adds the specified CSS class names to this HTML DOM node.
	`blurAll()` Blurs (unfocuses) this DOM node and all relevant child nodes.
	`destroy()` The internal widget destructor function.
	`disable()` Disables this widget if it was previously enabled.
	`emit(event, optsopt) → {boolean}` Dispatches a single event from this DOM node.
	`enable()` Enables this widget if it was previously disabled.
	`getChildNodes() → {Array}` Returns an array with all child DOM nodes.
	`getValue() → {string}` Returns the text area value.
	`hasClass(…cls) → {boolean}` Checks if this HTML DOM node has the specified CSS class names.
	`hide()` Hides this widget node if it was previously visible.
	`isDisabled() → {boolean}` Checks if this widget is disabled.
	`isHidden() → {boolean}` Checks if this widget node is hidden.
	`off(eventopt, selectoropt, listeneropt) → {Node}` Removes one or more previously attached event listeners.
	`on(event, selectoropt, listener, optsopt) → {Node}` Attaches a listener function for one or more events.
	`once(event, selectoropt, listener, optsopt) → {Node}` Attaches a single event listener function.
	`removeAll()` Removes all children to this widget.
	`removeChildNode(child)` Removes a single child DOM node from this widget.
	`removeClass(…cls)` Removes the specified CSS class names from this HTML DOM node.
	`reset()` Resets the text area form value to the initial value.
	`setAttrs(attrs)` Updates the widget or HTML DOM node attributes.
	`setStyle(styles)` Updates the CSS styles of this HTML DOM node.
	`show()` Shows this widget node if it was previously hidden.
	`toggleClass(…cls) → {boolean}` Toggles adding and removing the specified CSS class names to and from this HTML DOM node.
	`uid() → {string}` Returns the unique identifier for this DOM node.

Event Summary
	`onchange` Emitted when the text is modified.

Constructor

new TextArea(attrs, …valueopt) → {Widget}

Creates a new text area (or text box) widget.

Properties:

Name	Type	Description
`disabled`	{boolean}	The read-only widget disabled flag.
`defaultValue`	{string}	The value to use on form reset.

Parameters:

Name Type Attributes Description

attrs

{Object}

the widget and node attributes

Properties

Name	Type	Attributes	Description
`name`	{string}	<optional>	the form field name
`value`	{string}	<optional>	the field value, defaults to ""
`helpText`	{string}	<optional>	the help text when empty (deprecated)
`autosize`	{boolean}	<optional>	the auto-resize flag, defaults to false
`disabled`	{boolean}	<optional>	the disabled widget flag, defaults to false
`hidden`	{boolean}	<optional>	the hidden widget flag, defaults to false

value {string|Node} <optional>
<repeatable> the initial text content

Returns:

{Widget} the widget DOM node

Examples:

JavaScript

var attrs = { name="description", placeholder: "Description Text" };
var field = RapidContext.Widget.TextArea(attrs);

User Interface XML

<TextArea name="description" placeholder="Description Text" />

Source:

RapidContext_Widget_TextArea.js, line 50

Extends

RapidContext.Widget

Methods

addAll(…child)

Adds one or more children to this widget. This method will flatten any arrays among the arguments and ignores any null or undefined arguments. Any DOM nodes or widgets will be added to the end, and other objects will be converted to a text node first. Subclasses should normally override the addChildNode() method instead of this one, since that is the basis for DOM node insertion.

Parameters:

Name	Type	Attributes	Description
`child`	{string\|Node\|Array}	<repeatable>	the children to add

Inherited From:

RapidContext.Widget#addAll

Source:

RapidContext_Widget.js, line 531

addChildNode(child)

Adds a single child DOM node to this widget. This method is sometimes overridden by child widgets in order to hide or control intermediate DOM nodes required by the widget.

Parameters:

Name	Type	Description
`child`	{Widget\|Node}	the DOM node to add

Inherited From:

RapidContext.Widget#addChildNode

Source:

RapidContext_Widget.js, line 495

addClass(…cls)

Adds the specified CSS class names to this HTML DOM node.

Parameters:

Name	Type	Attributes	Description
`cls`	{string\|Array}	<repeatable>	the CSS class names to add

Inherited From:

RapidContext.Widget#addClass

Source:

RapidContext_Widget.js, line 327

blurAll()

Blurs (unfocuses) this DOM node and all relevant child nodes. This function will recursively blur all <a>, <button>, <input>, <textarea> and <select> child nodes found.

Inherited From:: RapidContext.Widget#blurAll
Source:: RapidContext_Widget.js, line 471

destroy()

The internal widget destructor function. This method should only be called by destroyWidget() and may be overridden by subclasses. By default this method does nothing.

Inherited From:: RapidContext.Widget#destroy
Source:: RapidContext_Widget.js, line 197

disable()

Disables this widget if it was previously enabled. This method is equivalent to calling setAttrs({ disabled: true }).

Inherited From:: RapidContext.Widget#disable
Source:: RapidContext_Widget.js, line 416

emit(event, optsopt) → {boolean}

Dispatches a single event from this DOM node. Also creates a new CustomEvent instance if needed.

Parameters:

Name Type Attributes Description

event {string/Event} the event type name or instance

opts

{Object}

the event options

Properties

Name	Type	Attributes	Default	Description
`async`	{boolean}	<optional>	true	the async dispatch flag
`bubbles`	{boolean}	<optional>		the event bubbles flag
`cancelable`	{boolean}	<optional>		the cancellable event flag
`detail`	{Object}	<optional>		the additional event details

Returns:

{boolean} true if event was async or not cancelled

Inherited From:

RapidContext.UI.Event#emit

Source:

rapidcontext/ui/event.mjs, line 26

enable()

Enables this widget if it was previously disabled. This is equivalent to calling setAttrs({ disabled: false }).

Inherited From:: RapidContext.Widget#enable
Source:: RapidContext_Widget.js, line 408

getChildNodes() → {Array}

Returns an array with all child DOM nodes. Note that the array is a real JavaScript array, not a dynamic NodeList. This method is sometimes overridden by child widgets in order to hide intermediate DOM nodes required by the widget.

Returns:: {Array} the array of child DOM nodes
Inherited From:: RapidContext.Widget#getChildNodes
Source:: RapidContext_Widget.js, line 483

getValue() → {string}

Returns the text area value. This function is slightly different from using the value property directly, since it will attempt to normalize newlines in the value.

Returns:

{string} the field value

Example:

var str = field.getValue();
var lines = str.split("\n").map((s) => s.trim());
field.setAttrs({ "value": lines.join("\n") });

Source:

RapidContext_Widget_TextArea.js, line 136

hasClass(…cls) → {boolean}

Checks if this HTML DOM node has the specified CSS class names. Note that more than one CSS class name may be checked, in which case all must be present.

Parameters:

Name	Type	Attributes	Description
`cls`	{string\|Array}	<repeatable>	the CSS class names to check

Returns:

{boolean} true if all CSS classes were present, or false otherwise

Inherited From:

RapidContext.Widget#hasClass

Source:

RapidContext_Widget.js, line 310

hide()

Hides this widget node if it was previously visible. This method is equivalent to calling setAttrs({ hidden: true }). It is safe for all types of widgets, since it only adds the widgetHidden CSS class instead of setting the display style property.

Inherited From:: RapidContext.Widget#hide
Source:: RapidContext_Widget.js, line 462

isDisabled() → {boolean}

Checks if this widget is disabled. This method checks both the "widgetDisabled" CSS class and the disabled property. Changes to the disabled status can be made with enable(), disable() or setAttrs().

Returns:: {boolean} true if the widget is disabled, or false otherwise
Inherited From:: RapidContext.Widget#isDisabled
Source:: RapidContext_Widget.js, line 387

isHidden() → {boolean}

Checks if this widget node is hidden. This method checks for the existence of the widgetHidden CSS class. It does NOT check the actual widget visibility (the display style property set by animations for example).

Returns:: {boolean} true if the widget is hidden, or false otherwise
Inherited From:: RapidContext.Widget#isHidden
Source:: RapidContext_Widget.js, line 429

off(eventopt, selectoropt, listeneropt) → {Node}

Removes one or more previously attached event listeners. If no event details or listeners are specified, all matching handlers are removed.

Parameters:

Name	Type	Attributes	Description
`event`	{string}	<optional>	the event type name (or space separated names)
`selector`	{string}	<optional>	the CSS selector to match for event target
`listener`	{function}	<optional>	the event handler function (or `false`)

Returns:

{Node} the input DOM node (for chaining calls)

Inherited From:

RapidContext.UI.Event#off

Source:

rapidcontext/ui/event.mjs, line 77

on(event, selectoropt, listener, optsopt) → {Node}

Attaches a listener function for one or more events.

Parameters:

Name Type Attributes Description

event {string} the event type name (or space separated names)

selector {string} <optional> the CSS selector to match for event target

listener {function} the event handler function (or false)

opts

{Object}

the event listener options (see addEventListener)

Properties

Name	Type	Attributes	Description
`delay`	{number}	<optional>	an inactivity delay before calling listener

Returns:

{Node} the input DOM node (for chaining calls)

Inherited From:

RapidContext.UI.Event#on

Source:

rapidcontext/ui/event.mjs, line 44

once(event, selectoropt, listener, optsopt) → {Node}

Attaches a single event listener function. The listener will be removed the first time an event is triggered.

Parameters:

Name Type Attributes Description

event {string} the event type name (or space separated names)

selector {string} <optional> the CSS selector to match for event target

listener {function} the event handler function (or false)

opts

{Object}

the event listener options (see addEventListener)

Properties

Name	Type	Attributes	Description
`delay`	{number}	<optional>	an inactivity delay before calling listener

Returns:

{Node} the input DOM node (for chaining calls)

Inherited From:

RapidContext.UI.Event#once

Source:

rapidcontext/ui/event.mjs, line 60

removeAll()

Removes all children to this widget. This method will also destroy and child widgets and disconnect all signal listeners. This method uses the getChildNodes() and removeChildNode() methods to find and remove the individual child nodes.

Inherited From:: RapidContext.Widget#removeAll
Source:: RapidContext_Widget.js, line 543

removeChildNode(child)

Removes a single child DOM node from this widget. This method is sometimes overridden by child widgets in order to hide or control intermediate DOM nodes required by the widget.

Note that this method will NOT destroy the removed child widget, so care must be taken to ensure proper child widget destruction.

Parameters:

Name	Type	Description
`child`	{Widget\|Node}	the DOM node to remove

Inherited From:

RapidContext.Widget#removeChildNode

Source:

RapidContext_Widget.js, line 514

removeClass(…cls)

Removes the specified CSS class names from this HTML DOM node. Note that this method will not remove any class starting with "widget".

Parameters:

Name	Type	Attributes	Description
`cls`	{string\|Array}	<repeatable>	the CSS class names to remove

Inherited From:

RapidContext.Widget#removeClass

Source:

RapidContext_Widget.js, line 346

reset()

Resets the text area form value to the initial value.

Source:: RapidContext_Widget_TextArea.js, line 120

setAttrs(attrs)

Updates the widget or HTML DOM node attributes.

Parameters:

Name Type Description

attrs

{Object}

the widget and node attributes to set

Properties

Name	Type	Attributes	Description
`name`	{string}	<optional>	the form field name
`value`	{string}	<optional>	the field value
`helpText`	{string}	<optional>	the help text when empty (deprecated)
`autosize`	{boolean}	<optional>	the auto-resize flag
`disabled`	{boolean}	<optional>	the disabled widget flag
`hidden`	{boolean}	<optional>	the hidden widget flag

Overrides:

RapidContext.Widget#setAttrs

Source:

RapidContext_Widget_TextArea.js, line 96

setStyle(styles)

Updates the CSS styles of this HTML DOM node. This method is identical to MochiKit.Style.setStyle, but uses "this" as the first argument.

Parameters:

Name	Type	Description
`styles`	{Object}	an object with the styles to set

Inherited From:

RapidContext.Widget#setStyle

Example:

widget.setStyle({ "font-size": "bold", "color": "red" });

Source:

RapidContext_Widget.js, line 287

show()

Shows this widget node if it was previously hidden. This method is equivalent to calling setAttrs({ hidden: false }). It is safe for all types of widgets, since it only removes the widgetHidden CSS class instead of setting the display style property.

Inherited From:: RapidContext.Widget#show
Source:: RapidContext_Widget.js, line 452

toggleClass(…cls) → {boolean}

Toggles adding and removing the specified CSS class names to and from this HTML DOM node. If all the CSS classes are already set, they will be removed. Otherwise they will be added.

Parameters:

Name	Type	Attributes	Description
`cls`	{string\|Array}	<repeatable>	the CSS class names to remove

Returns:

{boolean} true if the CSS classes were added, or false otherwise

Inherited From:

RapidContext.Widget#toggleClass

Source:

RapidContext_Widget.js, line 368

uid() → {string}

Returns the unique identifier for this DOM node. If a node id has already been set, that id will be returned. Otherwise a new id will be generated and assigned to the widget DOM node.

Returns:: {string} the the unique DOM node identifier
Inherited From:: RapidContext.Widget#uid
Source:: RapidContext_Widget.js, line 185

Events

onchange

Emitted when the text is modified. This event is triggered by either user events (keypress, paste, cut, blur) or by setting the value via setAttrs(). The DOM standard onchange event has no 'event.detail' data and is triggered on blur. The synthetic onchange events all contain an 'event.detail' object with 'before', 'after' and 'cause' properties.

Source:: RapidContext_Widget_TextArea.js, line 73