Moobile.Component

Extends Moobile.EventFirer

Provides the base class for most visual objects the user will interact with. A component encapsulates a DOM element and provides methods to handle a hierarchy of components.

Initialization

Syntax:

var component = new Moobile.Component([element], [options], [name]);

Parameters:

Name Type Description
element Optional Element The component's element, element id or html string.
options Optional Object The component's options, see below.
name Optional String The component's name.

Options:

Name Type Description
className String The component's extended CSS class name, defaults to null.
styleName String The component's default style, defaults to null.
tagName String The component's element tag name, defaults to div.

Notes:

Upon initialization, a component builds its hierarchy using the element given to the constructor. It will looks for elements with the data-role attribute and execute their definitions recursively. The example section shows how to create components with complex hierarchies.

Subclassing Notes:

Don't instantiate this class. Instead, extend it by creating subclasses for your own implementation.

Examples:

Creating an empty component:
var component = new Moobile.Component();
Creating a component with a single child:
var element =
    '<div>' +
        '<div data-role="button" data-name="my-button">Button</div>' +
    '</div>';
var component = new Moobile.Component(element);
component.getChildComponent('my-button'); // returns a Moobile.Button instance
Creating a component with multiple children:
var element =
    '<div>' +
        '<img data-role="image" data-name="my-image" />' +
        '<div data-role="button" data-name="my-button-1">Button 1</div>' +
        '<div data-role="button" data-name="my-button-2">Button 2</div>' +
    '</div>';
var component = new Moobile.Component(element);
component.getChildComponent('my-image'); // returns a Moobile.Image instance
component.getChildComponent('my-button-1'); // returns a Moobile.Button instance
component.getChildComponent('my-button-2'); // returns a Moobile.Button instance
Creating a component with a complex hierarchy:
var element =
    '<div>' +
        '<div data-role="button" data-name="my-button">' +
            '<img data-role="image" data-name="my-button-image" />' +
            '<div data-role="label">Button 2</div>' +
        '</div>' +
    '</div>';
var component = new Moobile.Component(element);
component.getChildComponent('my-button-image'); // returns null! The image is a child of the button.
component.getChildComponent('my-button').getChildComponent('my-button-image'); // returns a Moobile.Image instance.
Creating a component that passes options using element attributes:
var element =
    '<div data-option-style-name="moo" data-option-some-option="value">' +
    '</div>';
var component = new Moobile.Component(element);

Events

ready

Fired when this component becomes ready.

A component is ready when its hierarchy is assigned to a window and therefore in the DOM. Upon being ready, a component can access its window and perform tasks such as measuring.


tap

Fired when this component receives a touchend event with only one touch. The tap event is cancelled when the current touch moves more than 10 pixels.


tapstart

Fired when this component receives a touchstart event with only one touch.


tapmove

Fired when this component receives a touchmove event with only one touch.


tapend

Fired when this component receives a touchend event with only one touch.


touchstart

Fired when this component receives a standard touchstart event.


touchmove

Fired when this component receives a standard touchmove event.


touchend

Fired when this component receives a standard touchend event.


pinch

Fired when this component receives a pinch event.


swipe

Fired when this component receives a swipe event.


show

Fired when this component becomes visible.


hide

Fired when this component becomes hidden.


owntransitionend

Fired when a CSS transition finishes. The transition must be applied to this component's root element.


ownanimationend

Fired when a CSS animation finishes. The animation must be applied to this component's root element.

Members

element

The element managed by this component.

Type


options

The component's options.

Type

Name Type Description
className String The component's extended CSS class name, defaults to null.
styleName String The component's default style, defaults to null.
tagName String The component's element tag name, defaults to div.

Methods

addChildComponent(component, [where])

Adds the specified component at the top or bottom of this component. If where is omitted, the specified component will be added at the bottom.

Parameters:

Name Type Description
component Moobile.Component The component.
where Optional String The component's location, either top or bottom, defaults to bottom.

Returns:

Examples:

Adding a component at the top:
var componentOne = new Moobile.Component('<div class="component-one"><span>Lorem</span></div>')
var componentTwo = new Moobile.Component('<div class="component-two"></div>');
componentOne.addChildComponent(componentTwo, 'top');

Resulting element:

<div class="component-one">
    <div class="component-two"></div>
    <span>Lorem</span>
</div>
Adding a component at the botom:
var componentOne = new Moobile.Component('<div class="component-one"><span>Lorem</span></div>')
var componentTwo = new Moobile.Component('<div class="component-two"></div>');
componentOne.addChildComponent(componentTwo, 'bottom');

Resulting element:

<div class="component-one">
    <span>Lorem</span>
    <div class="component-two"></div>
</div>

addChildComponentInside(component, element, [where])

Adds the specified component at the top or bottom of this component's element. If where is omitted, the specified component will be added at the bottom of this component's element.

Parameters:

Name Type Description
component Moobile.Component The component.
element Mixed The component's element or a CSS selector.
where Optional String The component's location, either top or bottom, defaults to bottom.

Returns:

Example:

var componentOne = new Moobile.Component('<div class="component-one"><div class="me"></div></div>')
var componentTwo = new Moobile.Component('<div class="component-two"></div>');
componentOne.addChildComponentInside(componentTwo, '.me');

Resulting element:

<div class="component-one">
    <div class="me">
        <div class="component-two"></div>
    </div>
</div>

addChildComponentAfter(component, after)

Adds the specified component after another child of this component.

Parameters:

Name Type Description
component Moobile.Component The component.
after Moobile.Component The component will be placed after this component.

Returns:

Example:

var componentOne = new Moobile.Component('<div class="component-one"></div>');
var componentTwo = new Moobile.Component('<div class="component-two"></div>');
var componentThree = new Moobile.Component('<div class="third"></div>');
componentOne.addChildComponent(componentTwo);
componentOne.addChildComponentAfter(componentThree, componentTwo);

Resulting element:

<div class="component-one">
    <div class="component-two"></div>
    <div class="third"></div>
</div>

addChildComponentBefore(component, before)

Adds the specified component before another child of this component.

Parameters:

Name Type Description
component Moobile.Component The component.
before Moobile.Component The component will be placed before this component.

Returns:

Example:

var componentOne = new Moobile.Component('<div class="component-one"></div>');
var componentTwo = new Moobile.Component('<div class="component-two"></div>');
var componentThree = new Moobile.Component('<div class="third"></div>');
componentOne.addChildComponent(componentTwo);
componentOne.addChildComponentBefore(componentThree, componentTwo);

Resulting element:

<div class="component-one">
    <div class="third"></div>
    <div class="component-two"></div>
</div>

getChildComponent(name)

Returns a component that matches the specified name.

Parameters:

Name Type Description
name String The name of the component to search for.

Returns:

Example:

var componentOne = new Moobile.Component('<div class="component-one"></div>');
var componentTwo = new Moobile.Component('<div class="component-two"></div>', null, 'my-second-component');
componentOne.addChildComponent(componentTwo);
componentOne.getChildComponent('my-second-component'); // returns componentTwo

getChildComponentOfType(type, name)

Returns a component of a specified type that matches the specified name.

Parameters:

Name Type Description
type Class The component's class.
name String The name of the component to search for.

Returns:

Example:

var component = new Moobile.Component();
var button = new Moobile.Button(null, null, 'foo');
var image = new Moobile.Image(null, null, 'foo');
component.addChildComponent(button);
component.addChildComponent(image);
component.getChildComponentOfType(Moobile.Image, 'foo'); // returns image

getChildComponentAt(index)

Returns a component at a specified index.

Parameters:

Name Type Description
index Number The index location of the component.

Returns:

Example:

var component = new Moobile.Component();
var button = new Moobile.Button();
var image = new Moobile.Image();
component.addChildComponent(button);
component.addChildComponent(image);
component.getChildComponentAt(0); // returns button

getChildComponentOfTypeAt(type, index)

Returns a component of a specified type at a specified index.

Parameters:

Name Type Description
type Class The component's class.
index Number The component's index.

Returns:

Example:

var component = new Moobile.Component();
var button = new Moobile.Button();
var image = new Moobile.Image();
component.addChildComponent(button);
component.addChildComponent(image);
component.getChildComponentOfTypeAt(Moobile.Image, 0); // returns image

getChildComponentIndex(component)

Returns the index of a specified component or -1 if the component is not a child of this component.

Parameters:

Name Type Description
component Moobile.Component The component to search for.

Returns:

Example:

var component = new Moobile.Component();
var button = new Moobile.Button();
var image = new Moobile.Image();
component.addChildComponent(button);
component.addChildComponent(image);
component.getChildComponentIndex(Moobile.Image); // returns 1

getChildComponents()

Returns all components in this component.

Returns:

Example:

var component = new Moobile.Component();
var buttonOne = new Moobile.Button();
var buttonTwo = new Moobile.Button();
component.addChildComponent(buttonOne);
component.addChildComponent(buttonTwo);
component.getChildComponents(); // returns [buttonOne, buttonTwo]

getChildComponentsOfType(type)

Returns all components of a specified type in this component.

Parameters:

Name Type Description
type Class The component's class.

Returns:

Example:

var component = new Moobile.Component();
var buttonOne = new Moobile.Button();
var buttonTwo = new Moobile.Button();
var image = new Moobile.Image();
component.addChildComponent(buttonOne);
component.addChildComponent(buttonTwo);
component.addChildComponent(image);
component.getChildComponentsOfType(Moobile.Button); // returns [buttonOne, buttonTwo]

hasChildComponent(component)

Indicates whether a component is present in this component.

Parameters:

Name Type Description
component Moobile.Component The component to search for.

Returns:

Example:

var component = new Moobile.Component();
var button = new Moobile.Button();
component.addChildComponent(button);
component.hasChildComponent(button); // returns true

hasChildComponentOfType(type)

Indicates whether this component has at least one component of the specified type.

Parameters:

Name Type Description
type Class The component's class.

Returns:

Example:

var component = new Moobile.Component();
var button = new Moobile.Button();
var image = new Moobile.Image();
component.addChildComponent(button);
component.addChildComponent(image);
component.hasChildComponentOfType(Moobile.Image); // returns true

getDescendantComponent(name)

Returns a component that matches the specified name within all the child components recursively.

Parameters:

Name Type Description
name String The name of the component to search for.

Returns:

Example:

var componentOne = new Moobile.Component('<div class="component-one"></div>');
var componentTwo = new Moobile.Component('<div class="component-two"></div>', null, 'my-second-component');
var componentThree new Moobile.Component('<div class="component-two"></div>', null, 'my-third-component');
componentOne.addChildComponent(componentTwo);
componentTwo.addChildComponent(componentThree);
componentOne.getChildComponent('my-third-component'); // returns componentThree

replaceChildComponent(component, replacement, [destroy])

Replaces a component with another.

Parameters:

Name Type Description
component Moobile.Component The component to remove.
replacement Moobile.Component The component to replace it with.
destroy Optional Boolean Whether to destroy the component upon removal.

Returns:

Example:

var component = new Moobile.Component();
var buttonOne = new Moobile.Button();
var buttonTwo = new Moobile.Button();
component.addChildComponent(buttonOne);
component.replaceChildComponent(buttonOne, buttonTwo); // Replaces buttonOne with buttonTwo

removeChildComponent(component, [destroy])

Removes a component.

Parameters:

Name Type Description
component Moobile.Component The component to remove.
destroy Optional Boolean Whether to destroy the component upon removal.

Returns:

Example:

var component = new Moobile.Component();
var button = new Moobile.Button();
component.addChildComponent(button);
component.removeChildComponent(button); // Removes button

removeAllChildComponents([destroy])

Removes all components.

Parameters:

Name Type Description
destroy Optional Boolean Whether to destroy the components upon removal.

Returns:


removeAllChildComponentsOfType(type, [destroy])

Removes all components of a specified type.

Parameters:

Name Type Description
type Class The component's class.
destroy Optional Boolean Whether to destroy the components upon removal.

Returns:

Example:

var component = new Moobile.Component();
var buttonOne = new Moobile.Button();
var buttonTwo = new Moobile.Button();
var image = new Moobile.Image();
component.addChildComponent(buttonOne);
component.addChildComponent(buttonTwo);
component.addChildComponent(image);
component.removeAllChildComponentsOfType(Moobile.Button); // Removes buttonOne, buttonTwo

removeFromParentComponent([destroy])

Removes this component from its parent.

Parameters:

Name Type Description
destroy Optional Boolean Whether to destroy the component upon removal.

Returns:


setParentComponent(parent)

Sets the parent of this component.

This method is handled by the Moobile.Component class and should not be called manually.

Parameters:

Name Type Description
parent Moobile.Component The parent.

Returns:


getParentComponent()

Returns the parent of this component.

Returns:


hasParentComponent()

Indicates whether this component has a parent.

Returns:


setWindow(window)

Sets the window that contains this component.

This method is handled by the Moobile.Component class and should not be called manually.

Parameters:

Name Type Description
window Moobile.Window The window.

Returns:


getWindow()

Returns the window that contains this component.

Returns:


hasWindow()

Indicates whether this component has a window.

Returns:


setReady()

Sets whether this component is ready.

A component is ready when its element is assigned to a window and therefore in the DOM. Upon being ready, a component can access its window and perform tasks such as measuring.

This method is handled by the Moobile.Component class and should not be called manually.

Returns:


isReady()

Indicates whether this component is ready.

A component is ready when its element is assigned to a window and therefore in the DOM. Upon being ready, a component can access its window and perform tasks such as measuring.

Returns:


getName()

Returns this component's name.

Returns:


setStyle(name)

Sets the style of this component.

Parameters:

Name Type Description
name String The style name.

Returns:


getStyle()

Returns the current style name.

Returns:


hasStyle(name)

Indicates whether the specified style is currently applied to this component.

Returns:


addClass(name)

Adds the specified CSS class to this component's element.

Parameters:

Name Type Description
name String The CSS class.

Returns:


removeClass(name)

Removes the specified CSS class from this component's element.

Parameters:

Name Type Description
name String The CSS class.

Returns:


toggleClass(name, force)

Adds or removes the specified CSS class from this component.

Parameters:

Name Type Description
name String The CSS class.
force Optional Boolean Force the class to be either added or removed

Returns:


getElement(selector)

Returns this component's element or the first element within this component's element that matches the specified selector.

Parameters:

Name Type Description
selector Optional String An CSS selector.

Returns:


getElements(selector)

Returns a collection of elements from this component's element that matches the specified selector.

Parameters:

Name Type Description
selector String The CSS selector.

Returns:


hasElement(element)

Indicates whether the specified element is a child of this component's element.

Parameters:

Name Type Description
element Element The element.

Returns:


getRoleElement(name)

Returns the first element within this component's element that matches the specified role.

Parameters:

Name Type Description
name String The role.

Returns:

Example:

var component = new Moobile.Component('<div><div data-role="button"></div></div>');
component.getRoleElement('button'); // Returns <div data-role="button"></div>

var component = new Moobile.Component('<div><div data-role="button"><div data-role="label"></div></div></div>');
component.getRoleElement('label'); // Returns null because the element with the 'label' role is inside an element with the 'button' role

getRoleElements(name, limit)

Returns a collection of elements from this component's element that matches the specified role.

Parameters:

Name Type Description
name String The role.
limit Optional Number The maximal amount of elements that can be returned.

Returns:


getSize()

Returns this component's size as an object with two keys, x to indicate the width and y to indicate the height.

The component must be ready when calling this method otherwise it won't be measured.

Returns:


getPosition([relative])

Returns this component's position relative to a specified element. If omitted, the position returned will be relative to its parent.

The component must be ready when calling this method otherwise it won't be measured.

Parameters:

Name Type Description
relative Mixed The position will be relative to this element or component

Returns:


show()

Shows this component. This method will also remove the hidden CSS class from this component's element.

This method fires the show event.

Returns:


hide()

Hides this component. This method will also add the hidden CSS class from this component's element.

This method fires the hide event.

Returns:


willBuild()

Tells this component it's about to be built. This method is called once this component's element is set and before its roles are being processed.

Override this method to provide your own implementation.


didBuild()

Tells this component it has been built.

Override this method to provide your own implementation.


didBecomeReady()

Tells this component it has become ready.

A component is ready when its element is assigned to a window and therefore in the DOM. Upon being ready, a component can access its window and perform tasks such as measuring.

Override this method to provide your own implementation.


willAddChildComponent(component)

Tells this component a component is about to be added.

Override this method to provide your own implementation.

Parameters:

Name Type Description
component Moobile.Component The component that is about to be added.

didAddChildComponent(component)

Tells this component a component has been added.

Override this method to provide your own implementation.

Parameters:

Name Type Description
component Moobile.Component The component that has been added.

willRemoveChildComponent(component)

Tell this component a child component is about to be removed.

Override this method to provide your own implementation.

Parameters:

Name Type Description
component Moobile.Component The component that is about to be removed.

didRemoveChildComponent(component)

Tell this component a child component has been removed.

Override this method to provide your own implementation.

Parameters:

Name Type Description
component Moobile.Component The component that has been removed.

parentComponentWillChange(parent)

Tell this component it's about to be moved to another component.

Override this method to provide your own implementation.

Parameters:

Name Type Description
parent Moobile.Component The component this component will be moved to.

parentComponentDidChange(parent)

Tell this component it has been moved to a new component.

Override this method to provide your own implementation.

Parameters:

Name Type Description
parent Moobile.Component The component this component has been moved to.

windowWillChange(window)

Tell this component it's about to be moved to another window.

Override this method to provide your own implementation.

Parameters:

Name Type Description
window Moobile.Window The window this component will be moved to.

windowDidChange(window)

Tell this component it has been moved to a new window.

Override this method to provide your own implementation.

Parameters:

Name Type Description
parent Moobile.Window The window this component has been moved to.

willShow()

Tell thid component it's about to become visible.

Override this method to provide your own implementation.


didShow()

Tell this component it became visible.

Override this method to provide your own implementation.


willHide()

Tell this component it's about to become hidden.

Override this method to provide your own implementation.


didHide()

Tell this component it became hidden.

Override this method to provide your own implementation.


destroy()

Remove this component from its parent, destroy its hierarchy and prepare it for garbage collection.

If you override this method, make sure you call the parent method at the end of your implementation.

Returns:

Static Methods

Moobile.Component.defineRole(name, context, options, handler)

Define the process to execute upon finding an element with the given role.

Parameters:

Name Type Description
name String The name.
context Moobile.Component The context component or null to define the role for all components.
options Object The options.
handler Function The function that handles this role.

Options:

Name Type Description
traversable Boolean Defines whether this component will go continue looking for element with roles within this element upon building, defaults to false.

Examples:

For every element with the data-role="wrapped" attribute found in all types of components, an element will be created and wrapped around it.
 Moobile.Component.defineRole('wrapped', null, null, function(element) {
    new Element('div.wrapped').wraps(element);
 });
For every elements with the data-role="button" attribute within a Moobile.ButtonGroup control, a new Moobile.Button instance will be created and added to the group as a child component.
Moobile.Component.defineRole('button', Moobile.ButtonGroup, null, function(element) {
    var button = new Moobile.Button(element);
    this.addChildComponent(button);
});

Moobile.Component.defineAttribute(name, context, handler)

Define the process to execute upon finding a specified attribute of the component's element.

Name Type Description
name String The name.
context Moobile.Component The context component or null to define the role for all components.
handler Function The function that handles this attribute.

Example:

Moobile.Component.defineAttribute('data-style', null, function(value) {
    this.options.styleName = value;
});

Moobile.Component.defineStyle(name, target, behavior)

Defines a style for a component or all components if target is set to null.

Parameters:

Name Type Description
name String The style name.
target Moobile.Component The target component or null to define the role for all components.
behavior Object The style definition, which consists of an object with an attach and detach method.

Example:

Moobile.Component.defineStyle('glowing', Moobile.Button, {
    attach: function() {
        this.addClass('glow');
    },
    detach: function() {
        this.removeClass('glow');
    }
});

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