Class RapidContext.Widget.Tree

.Widget.Tree(attrs, …childopt) → {Widget}

The tree widget class. Used to provide a dynamic tree with expandable tree nodes, using a number of <div> HTML elements.

Constructor Summary
	`new Tree(attrs, …childopt) → {Widget}` Creates a new tree widget.

Method Summary
	`addAll(…child)` Adds one or more children to this widget.
	`addChildNode(child)` Adds a single child tree node widget to this widget.
	`addClass(…cls)` Adds the specified CSS class names to this HTML DOM node.
	`addPath(path) → {Widget}` Adds a path to the tree as a recursive list of child nodes.
	`blurAll()` Blurs (unfocuses) this DOM node and all relevant child nodes.
	`collapseAll(depthopt)` Recursively collapses all 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.
	`expandAll(depthopt)` Recursively expands all nodes.
	`findByPath(path) → {Widget}` Searches for a tree node from the specified path.
	`findRoot(name) → {Widget}` Finds a root tree node with the specified name.
	`getChildNodes() → {Array}` Returns an array with all child DOM nodes.
	`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.
	`markAll()` Marks this tree node and all child nodes recursively.
	`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.
	`removeAllMarked()` Removes all marked tree nodes.
	`removeChildNode(child)` Removes a single child DOM node from this widget.
	`removeClass(…cls)` Removes the specified CSS class names from this HTML DOM node.
	`selectedChild() → {Widget}` Returns the currently selected tree node.
	`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
	`oncollapse` Emitted when a tree node is collapsed.
	`onexpand` Emitted when a tree node is expanded.
	`onselect` Emitted when a tree node is selected.
	`onunselect` Emitted when a tree node selection is removed.

Constructor

new Tree(attrs, …childopt) → {Widget}

Creates a new tree widget.

Parameters:

Name Type Attributes Description

attrs

{Object}

the widget and node attributes

Properties

Name	Type	Attributes	Description
`hidden`	{boolean}	<optional>	the hidden widget flag, defaults to false

child {TreeNode} <optional>
<repeatable> the child tree node widgets

Returns:

{Widget} the widget DOM node

Examples:

JavaScript

var tree = RapidContext.Widget.Tree({ style: { width: "200px", height: "400px" } });
var root = RapidContext.Widget.TreeNode({ folder: true, name: "Root" });
var child = RapidContext.Widget.TreeNode({ name: "Child" });
root.addAll(child);
tree.addAll(root);

User Interface XML

<Tree style="width: 200px; height: 400px;">
  <TreeNode name="Root">
    <TreeNode name="Child" />
  </TreeNode>
</Tree>

Source:

RapidContext_Widget_Tree.js, line 49

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 535

addChildNode(child)

Adds a single child tree node widget to this widget.

Parameters:

Name	Type	Description
`child`	{Widget}	the tree node widget to add

Overrides:

RapidContext.Widget#addChildNode

Source:

RapidContext_Widget_Tree.js, line 112

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 329

addPath(path) → {Widget}

Adds a path to the tree as a recursive list of child nodes. If nodes in the specified path already exists, they will be used instead of creating new nodes.

Parameters:

Name	Type	Description
`path`	{Array}	the tree node path (array of names)

Returns:

{Widget} the last node in the path

Source:

RapidContext_Widget_Tree.js, line 278

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 475

collapseAll(depthopt)

Recursively collapses all nodes. If a depth is specified, only nodes below that depth will be collapsed.

Parameters:

Name	Type	Attributes	Description
`depth`	{number}	<optional>	the optional minimum depth

Source:

RapidContext_Widget_Tree.js, line 259

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 198

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 420

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 412

expandAll(depthopt)

Recursively expands all nodes. If a depth is specified, expansions will not continue below that depth.

Parameters:

Name	Type	Attributes	Description
`depth`	{number}	<optional>	the optional maximum depth

Source:

RapidContext_Widget_Tree.js, line 243

findByPath(path) → {Widget}

Searches for a tree node from the specified path.

Parameters:

Name	Type	Description
`path`	{Array}	the tree node path (array of names)

Returns:

{Widget} the descendant tree node found, or null if not found

Source:

RapidContext_Widget_Tree.js, line 191

findRoot(name) → {Widget}

Finds a root tree node with the specified name.

Parameters:

Name	Type	Description
`name`	{string}	the root tree node name

Returns:

{Widget} the root tree node found, or null if not found

Source:

RapidContext_Widget_Tree.js, line 173

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 487

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 311

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 466

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 391

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 433

markAll()

Marks this tree node and all child nodes recursively. When adding or updating tree nodes, any node modified is automatically unmarked (e.g. by calling setAttrs on the tree nodes or addPath on the tree). This makes it easy to prune a tree after an update, by initially marking all tree nodes, inserting or touching all nodes to keep, and finally calling removeAllMarked() to remove the remaining nodes.

Example:

tree.markAll();
tree.addPath(["Root", "Child"]);
...
tree.removeAllMarked();

Source:

RapidContext_Widget_Tree.js, line 158

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 547

removeAllMarked()

Removes all marked tree nodes. When adding or updating tree nodes, any node modified is automatically unmarked (e.g. by calling setAttrs on the tree nodes or addPath on the tree). This makes it easy to prune a tree after an update, by initially marking all tree nodes with markAll(), inserting or touching all nodes to keep, and finally calling this method to remove the remaining nodes.

Example:

tree.markAll();
tree.addPath(["Root", "Child"]);
...
tree.removeAllMarked();

Source:

RapidContext_Widget_Tree.js, line 133

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 518

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 349

selectedChild() → {Widget}

Returns the currently selected tree node.

Returns:: {Widget} the currently selected tree node, or null if no node is selected
Source:: RapidContext_Widget_Tree.js, line 209

setAttrs(attrs)

Updates the widget or HTML DOM node attributes. This method is sometimes overridden by individual widgets to allow modification of additional widget attributes.

Parameters:

Name Type Description

attrs

{Object}

the widget and node attributes to set

Properties

Name	Type	Attributes	Description
`disabled`	{boolean}	<optional>	the disabled widget flag
`hidden`	{boolean}	<optional>	the hidden widget flag
`class`	{string}	<optional>	the CSS class names

Inherited From:

RapidContext.Widget#setAttrs

Source:

RapidContext_Widget.js, line 235

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 288

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 456

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 372

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 186

Events

oncollapse

Emitted when a tree node is collapsed.

Source:: RapidContext_Widget_Tree.js, line 70

onexpand

Emitted when a tree node is expanded.

Source:: RapidContext_Widget_Tree.js, line 63

onselect

Emitted when a tree node is selected. It will be emitted after "onunselect" if another node was previously selected.

Source:: RapidContext_Widget_Tree.js, line 77

onunselect

Emitted when a tree node selection is removed. It will be emitted before "onselect" if another node was previously selected.

Source:: RapidContext_Widget_Tree.js, line 85