Class: Grid

Grid

new Grid(idopt, cols, rows, horizontalWrapping, verticalWrapping)

The Grid widget class represents a grid of widgets that may be navigated between using up/down/left/right.
Parameters:
Name Type Attributes Description
id String <optional>
 The unique ID of the widget. If excluded, a temporary internal ID will be used (but not included in any output).
cols Integer The number of columns in the grid.
rows Integer The number of rows in the grid.
horizontalWrapping boolean Enable or disable horizontal wrapping.
verticalWrapping boolean Enable or disable vertical wrapping.
Source:
Requires:
  • module:antie.events.KeyEvent
  • module:antie.events.SelectedItemChangeEvent

Extends

Requires

  • module:antie.events.KeyEvent
  • module:antie.events.SelectedItemChangeEvent

Methods

_onKeyDown(evt)

Key handler for grids. Processes KeyEvent.VK_UP, VK_DOWN, VK_LEFT and VK_RIGHT keys and stops propagation if the keypress is handled. Otherwise allows the event to be bubbled up to the parent widget to allow spatial navigation out of the list.
Parameters:
Name Type Description
evt antie.events.KeyEvent The key event.
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addClass(className)

Adds a CSS class to the widget if not already present.
Parameters:
Name Type Description
className String The class name to add.
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addEventListener(ev, func)

Add an event listener function to this widget.
Parameters:
Name Type Description
ev String The event type to listen for (e.g. keydown)
func function The handler to be called when the event is fired.
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appendChildWidget(widget)

Appends a child widget to this widget. Not supported for Grids - use setWidgetAt() instead.
Parameters:
Name Type Description
widget antie.widgets.Widget The child widget to add.
Overrides:
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broadcastEvent()

Broadcasts an event from the application level to every single object it contains.
Overrides:
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bubbleEvent(ev)

Bubbles an event from object, triggering any event listeners bound to this widget and any parent widgets. To halt bubbling of the event, see antie.events.Event#stopPropagation.
Parameters:
Name Type Description
ev antie.events.Event The event to bubble.
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fireEvent(ev)

Fires an event on this object, triggering any event listeners bound to this widget only. Note: this does not bubble or propagate the event to other widgets, for that functionality see #bubbleEvent.
Parameters:
Name Type Description
ev antie.events.Event The event to fire.
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focus()

Moves focus to a button within this container. Focused button will be that which follows the current 'active' path.
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Returns:
Boolean true if focus has been moved to a button. Otherwise returns false.

getActiveChildWidget()

Get the current active widget.
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Returns:
The current active widget

getChildWidget(id)

Get a child widget from its unique ID.
Parameters:
Name Type Description
id String The id of the child widget to return.
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Returns:
antie.widgets.Widget of the widget with the given ID, otherwise undefined if the child does not exist.

getChildWidgetCount()

Gets the number of direct child widgets.
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Returns:
The number of direct child widgets.

getChildWidgets()

Get an array of all this widget's children.
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Returns:
An array of all this widget's children.

getClasses()

Get an array of class names that this widget has.
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Returns:
An array of class names (Strings)

getComponent()

Returns the component this widget is a descendant of
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getCurrentApplication()

Gets a reference to the application responsible for creating the widget.
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See:
  • antie.RuntimeContext

getDataItem()

Get any data item associated with this widget.
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getWidgetAt(col, row)

Get the widget positioned at the specified column and row.
Parameters:
Name Type Description
col Integer The column the widget it in
row Integer The row the widget it in
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Returns:
The widget in the specified column and row

hasChildWidget(id)

Checks to see if a specific widget is a direct child of this widget.
Parameters:
Name Type Description
id String The widget id of the widget to check to see if it is a direct child of this widget.
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hasClass(className)

Checks to see if the widget has a given CSS class.
Parameters:
Name Type Description
className String The class name to check.
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Returns:
Boolean true if the device has the className. Otherwise boolean false.

hide(options)

Hides a widget. If animation is enabled the widget will be faded out of view.
Parameters:
Name Type Description
options Object Details of the element to be shown, with optional parameters.
Properties
Name Type Attributes Default Description
skipAnim Boolean <optional>
 By default the showing of the element will be animated (faded in). Pass true here to prevent animation.
onComplete function <optional>
 Callback function to be called when the element has been shown.
fps Number <optional>
 25 Frames per second for fade animation.
duration Number <optional>
 840 Duration of fade animation, in milliseconds (ms).
easing String <optional>
 linear Easing style for fade animation.
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Returns:
Boolean true if animation was called, otherwise false

insertChildWidget(index, widget)

Inserts a child widget at the specified index. Not supported for Grids.
Parameters:
Name Type Description
index Integer The index where to insert the child widget.
widget antie.widgets.Widget The child widget to add.
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isComponent() → {Boolean}

Returns whether the widget is a Component.
Inherited From:
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Returns:
True if the widget is a Component.
Type
Boolean

isFocusable()

Checks to see if a widget is focussable, i.e. contains an enabled button.
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isFocussed()

Get if this widget is in the current focus path.
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Returns:
Boolean true if this widget is in the focus path, otherwise false.

moveTo(options)

Moves a widget so that its top-left corner is at the given position.
Parameters:
Name Type Description
options Object Details of the element to be shown, with optional parameters.
Properties
Name Type Attributes Default Description
skipAnim Boolean <optional>
 By default the showing of the element will be animated (faded in). Pass true here to prevent animation.
onComplete function <optional>
 Callback function to be called when the element has been shown.
fps Number <optional>
 25 Frames per second for fade animation.
duration Number <optional>
 840 Duration of fade animation, in milliseconds (ms).
easing String <optional>
 linear Easing style for fade animation.
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Returns:
Boolean true if animation was called, otherwise false

prependWidget(widget)

Inserts a widget before the current one.
Parameters:
Name Type Description
widget antie.widgets.Widget The child widget to add.
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removeChildWidget(widget, retainElementopt)

Removes a specific child widget from this widget. Not supported for Grids.
Parameters:
Name Type Attributes Description
widget antie.widgets.Widget The child widget to remove.
retainElement Boolean <optional>
 Pass true to retain the child output element of the given widget
Overrides:
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removeChildWidgets()

Remove all child widgets from this widget.
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removeClass(className)

Removes a CSS class from the widget if present.
Parameters:
Name Type Description
className String The class name to remove.
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removeEventListener(ev, func)

Removes an event listener function to this widget.
Parameters:
Name Type Description
ev String The event type that the listener is to be removed from (e.g. keydown)
func function The handler to be removed.
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removeFocus()

Remove focus state from this widget.
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render(device)

Renders the widget and any child widgets to device-specific output.
Parameters:
Name Type Description
device antie.devices.Device The device to render to.
Overrides:
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Returns:
A device-specific object that represents the widget as displayed on the device (in a browser, a DOMElement);

setActiveChildIndex(index)

Attempts to set focus to the child widget at the given index.
Parameters:
Name Type Description
index Integer Index of the child widget to set focus to.
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Returns:
Boolean true if the child widget was focusable, otherwise boolean false.

setActiveChildWidget(widget)

Attempt to set focus to the given child widget. Note: You can only set focus to a focusable widget. A focusable widget is one that contains an enabled antie.widgets.Button as either a direct or indirect child. Note: Widgets have 2 independant states: active and focussed. A focussed widget is either the Button with focus, or any parent of that Button. An active widget is one which is the active child of its parent Container. When the parent widget receives focus, focus will be placed on the active child. Classes 'active' and 'focus' are appended to widgets with these states.
Parameters:
Name Type Description
widget antie.widgets.Widget The child widget to set focus to.
Overrides:
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Returns:
Boolean true if the child widget was focusable, otherwise boolean false.

setDataItem(dataItem)

Associate a data item with this widget.
Parameters:
Name Type Description
dataItem object Object to associate with this widget.
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setWidgetAt(col, row, widget)

Positions a widget at the specified column and row.
Parameters:
Name Type Description
col Integer The column to position the widget in
row Integer The row to position the widget in
widget antie.widgets.Widget The widget to add
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show(options)

Shows a widget. If animation is enabled the widget will be faded in.
Parameters:
Name Type Description
options Object Details of the element to be shown, with optional parameters.
Properties
Name Type Attributes Default Description
skipAnim Boolean <optional>
 By default the showing of the element will be animated (faded in). Pass true here to prevent animation.
onComplete function <optional>
 Callback function to be called when the element has been shown.
fps Number <optional>
 25 Frames per second for fade animation.
duration Number <optional>
 840 Duration of fade animation, in milliseconds (ms).
easing String <optional>
 linear Easing style for fade animation.
Inherited From:
Source:
Returns:
Boolean true if animation was called, otherwise false