| Pacchetto | spark.layouts |
| Classe | public class ViewMenuLayout |
| Ereditarietà | ViewMenuLayout  LayoutBase OnDemandEventDispatcher Object |
| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 4.5 |
| Versioni runtime: | AIR 2.5 |
The requestedMaxColumnCount property
defines the maximum number of menu items in a row.
By default, the property is set to three.
The ViewMenuLayout class define the layout as follows:
- If you define three or fewer menu items,
where the
requestedMaxColumnCountproperty contains the default value of three, the menu items are displayed in a single row. Each menu item has the same size.If you define four or more menu items, meaning more menu items than specified by the
requestedMaxColumnCountproperty, the ViewMenu container creates multiple rows. - If the number of menu items is evenly divisible by
the
requestedMaxColumnCountproperty, each row contains the same number of menu items. Each menu item is the same size.For example the
requestedMaxColumnCountproperty is set to the default value of three and you define six menu items. The menu displays two rows, each containing three menu items. - If the number of menu items is not evenly divisible by
the
requestedMaxColumnCountproperty, rows can contain a different number of menu items. The size of the menu items depends on the number of menu items in the row.For example the
requestedMaxColumnCountproperty is set to the default value of three and you define eight menu items. The menu displays three rows. The first row contains two menu items. The second and third rows each contains three items.
You can create your own custom layout for the menu by creating your own layout class. By default, the spark.skins.mobile.ViewMenuSkin class defines the skin for the ViewMenu container. To apply a customized ViewMenuLayout class to the ViewMenu container, define a new skin class for the ViewMenu container.
The ViewMenuSkin class includes a definition for a Group
container named contentGroup, as shown below:
<s:Group id="contentGroup" left="0" right="0" top="3" bottom="2"
minWidth="0" minHeight="0">
<s:layout>
<s:ViewMenuLayout horizontalGap="2" verticalGap="2" id="contentGroupLayout"
requestedMaxColumnCount="3" requestedMaxColumnCount.landscapeGroup="6"/>
</s:layout>
</s:Group>
To apply your customized ViewMenuLayout class, your skin class
should define a container named contentGroup.
That container uses the layout property
to specify your customized layout class.
Mostra sintassi MXML
Nascondi sintassi MXMLThe <s:ViewMenuLayout> tag inherits all of the tag
attributes of its superclass and adds the following tag attributes:
<s:ViewMenuLayout
Properties
horizontalGap="2"
requestedMaxColumnCount="3"
verticalGap="2"
/>
Altri esempi
Elementi API correlati
| Proprietà | Definito da | ||
|---|---|---|---|
 | clipAndEnableScrolling : Boolean
If true, specifies to clip the children to the boundaries of the viewport. | LayoutBase | |
| constructor : Object
Un riferimento all'oggetto classe o alla funzione di costruzione per una determinata istanza di oggetto. | Object | |
| dropIndicator : DisplayObject
The DisplayObject that this layout uses for
the drop indicator during a drag-and-drop operation. | LayoutBase | |
| horizontalGap : Number
The horizontal space between columns, in pixels. | ViewMenuLayout | ||
| horizontalScrollPosition : Number
The x coordinate of the origin of the viewport in the component's coordinate system,
where the default value is (0,0) corresponding to the upper-left corner of the component. | LayoutBase | |
| requestedMaxColumnCount : int
The maximum number of columns to display in a row. | ViewMenuLayout | ||
| target : GroupBase
The GroupBase container whose elements are measured, sized and positioned
by this layout. | LayoutBase | |
| typicalLayoutElement : ILayoutElement
Used by layouts when fixed row/column sizes are requested but
a specific size isn't specified. | LayoutBase | |
| useVirtualLayout : Boolean
A container can hold any number of children. | LayoutBase | |
| verticalGap : Number
The vertical space between rows, in pixels. | ViewMenuLayout | ||
| verticalScrollPosition : Number
The y coordinate of the origin of the viewport in the component's coordinate system,
where the default value is (0,0) corresponding to the upper-left corner of the component. | LayoutBase | |
| Metodo | Definito da | ||
|---|---|---|---|
Constructor. | ViewMenuLayout | ||
| addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
Registers an event listener object with an EventDispatcher object so that the listener
receives notification of an event. | OnDemandEventDispatcher | |
|
Calculates the drop location in the data provider of the drop target for
the specified dragEvent. | LayoutBase | |
|
When useVirtualLayout is true,
this method can be used by the layout target
to clear cached layout information when the target changes. | LayoutBase | |
|
Dispatches an event into the event flow. | OnDemandEventDispatcher | |
|
Called by the target after a layout element
has been added and before the target's size and display list are
validated. | LayoutBase | |
|
This method must is called by the target after a layout element
has been removed and before the target's size and display list are
validated. | LayoutBase | |
|
Returns the specified element's layout bounds as a Rectangle or null
if the index is invalid, the corresponding element is null,
includeInLayout=false,
or if this layout's target property is null. | LayoutBase | |
|
Returns the change to the horizontal scroll position to handle
different scrolling options. | LayoutBase | |
| getNavigationDestinationIndex(currentIndex:int, navigationUnit:uint, arrowKeysWrapFocus:Boolean):int
Delegation method that determines which item
to navigate to based on the current item in focus
and user input in terms of NavigationUnit. | LayoutBase | |
|
Computes the verticalScrollPosition and
horizontalScrollPosition deltas needed to
scroll the element at the specified index into view. | LayoutBase | |
|
Returns the change to the vertical scroll position to handle
different scrolling options. | LayoutBase | |
|
Checks whether the EventDispatcher object has any listeners registered for a specific type
of event. | OnDemandEventDispatcher | |
|
Indica se per un oggetto è definita una proprietà specifica. | Object | |
|
Hides the previously shown drop indicator,
created by the showDropIndicator() method,
removes it from the display list and also stops the drag scrolling. | LayoutBase | |
|
Indica se un'istanza della classe Object si trova nella catena di prototipi dell'oggetto specificato come parametro. | Object | |
|
Measures the target's default size based on its content, and optionally
measures the target's default minimum size. | LayoutBase | |
|
Indica se la proprietà specificata esiste ed è enumerabile. | Object | |
|
Removes a listener from the EventDispatcher object. | OnDemandEventDispatcher | |
|
Imposta la disponibilità di una proprietà dinamica per le operazioni cicliche. | Object | |
|
Sizes, positions and parents the drop indicator based on the specified
drop location. | LayoutBase | |
|
Restituisce la rappresentazione in formato stringa di questo oggetto, formattato in base alle convenzioni specifiche per le versioni localizzate. | Object | |
|
Restituisce la rappresentazione in formato stringa dell'oggetto specificato. | Object | |
|
Sizes and positions the target's elements. | LayoutBase | |
|
Called by the target at the end of its updateDisplayList
to have the layout update its scrollRect. | LayoutBase | |
|
Restituisce il valore di base dell'oggetto specificato. | Object | |
|
Checks whether an event listener is registered with this EventDispatcher object or any of its ancestors for the specified event type. | OnDemandEventDispatcher | |
horizontalGap | proprietà |
horizontalGap:Number| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 4.5 |
| Versioni runtime: | AIR 2.5 |
The horizontal space between columns, in pixels.
Il valore predefinito è 2.
Questa proprietà può essere utilizzata come origine per l’associazione di dati. Quando questa proprietà viene modificata, invia l’evento propertyChange .
Implementazione
public function get horizontalGap():Number public function set horizontalGap(value:Number):voidElementi API correlati
requestedMaxColumnCount | proprietà |
requestedMaxColumnCount:int| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 4 |
| Versioni runtime: | AIR 1.5 |
The maximum number of columns to display in a row.
Il valore predefinito è 3.
Implementazione
public function get requestedMaxColumnCount():int public function set requestedMaxColumnCount(value:int):void verticalGap | proprietà |
verticalGap:Number| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 4.5 |
| Versioni runtime: | AIR 2.5 |
The vertical space between rows, in pixels.
Il valore predefinito è 2.
Questa proprietà può essere utilizzata come origine per l’associazione di dati. Quando questa proprietà viene modificata, invia l’evento propertyChange .
Implementazione
public function get verticalGap():Number public function set verticalGap(value:Number):voidElementi API correlati
ViewMenuLayout | () | Funzione di costruzione |
public function ViewMenuLayout()| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 4.5 |
| Versioni runtime: | AIR 2.5 |
Constructor.
Tue Jun 12 2018, 02:44 PM Z