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spark.layouts 

ViewMenuLayout  - AS3 Flex

Pakketspark.layouts
Klassepublic class ViewMenuLayout
OverervingViewMenuLayout Inheritance LayoutBase Inheritance OnDemandEventDispatcher Inheritance Object

Taalversie: ActionScript 3.0
Productversie: Flex 4.5
Runtimeversies: AIR 2.5

The ViewMenuLayout class defines the layout of the ViewMenu container. The menu can have multiple rows depending on the number of menu items.

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 requestedMaxColumnCount property 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 requestedMaxColumnCount property, the ViewMenu container creates multiple rows.

  • If the number of menu items is evenly divisible by the requestedMaxColumnCount property, each row contains the same number of menu items. Each menu item is the same size.

    For example the requestedMaxColumnCount property 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 requestedMaxColumnCount property, 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 requestedMaxColumnCount property 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.

MXML-syntaxisexpandedMXML-syntaxis verbergen

The <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"
  />
  

Meer voorbeelden

Verwante API-elementen



Openbare eigenschappen
 EigenschapGedefinieerd door
 InheritedclipAndEnableScrolling : Boolean
If true, specifies to clip the children to the boundaries of the viewport.
LayoutBase
 Inheritedconstructor : Object
Verwijzing naar het klasseobject of de constructorfunctie van een bepaalde objectinstantie.
Object
 InheriteddropIndicator : 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
 InheritedhorizontalScrollPosition : 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
 Inheritedtarget : GroupBase
The GroupBase container whose elements are measured, sized and positioned by this layout.
LayoutBase
 InheritedtypicalLayoutElement : ILayoutElement
Used by layouts when fixed row/column sizes are requested but a specific size isn't specified.
LayoutBase
 InheriteduseVirtualLayout : Boolean
A container can hold any number of children.
LayoutBase
      verticalGap : Number
The vertical space between rows, in pixels.
ViewMenuLayout
 InheritedverticalScrollPosition : 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
Openbare methoden
 MethodeGedefinieerd door
  
    ViewMenuLayout()
Constructor.
ViewMenuLayout
 Inherited
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
 Inherited
Calculates the drop location in the data provider of the drop target for the specified dragEvent.
LayoutBase
 Inherited
When useVirtualLayout is true, this method can be used by the layout target to clear cached layout information when the target changes.
LayoutBase
 Inherited
Dispatches an event into the event flow.
OnDemandEventDispatcher
 Inherited
Called by the target after a layout element has been added and before the target's size and display list are validated.
LayoutBase
 Inherited
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
 Inherited
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
 Inherited
Returns the change to the horizontal scroll position to handle different scrolling options.
LayoutBase
 Inherited
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
 Inherited
Computes the verticalScrollPosition and horizontalScrollPosition deltas needed to scroll the element at the specified index into view.
LayoutBase
 Inherited
Returns the change to the vertical scroll position to handle different scrolling options.
LayoutBase
 Inherited
Checks whether the EventDispatcher object has any listeners registered for a specific type of event.
OnDemandEventDispatcher
 Inherited
Geeft aan of voor een object een opgegeven eigenschap is gedefinieerd.
Object
 Inherited
Hides the previously shown drop indicator, created by the showDropIndicator() method, removes it from the display list and also stops the drag scrolling.
LayoutBase
 Inherited
Geeft aan of een instantie van de klasse Object zich in de prototypeketen van het object bevindt dat als parameter is opgegeven.
Object
 Inherited
Measures the target's default size based on its content, and optionally measures the target's default minimum size.
LayoutBase
 Inherited
Geeft aan of de opgegeven eigenschap bestaat en kan worden opgesomd.
Object
 Inherited
removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void
Removes a listener from the EventDispatcher object.
OnDemandEventDispatcher
 Inherited
Stelt de beschikbaarheid van een dynamische eigenschap voor lusbewerkingen in.
Object
 Inherited
Sizes, positions and parents the drop indicator based on the specified drop location.
LayoutBase
 Inherited
Geeft de tekenreeksweergave van dit object weer, geformatteerd volgens de locatiespecifieke conventies.
Object
 Inherited
Retourneert een tekenreeksrepresentatie van het opgegeven object.
Object
 Inherited
Sizes and positions the target's elements.
LayoutBase
 Inherited
Called by the target at the end of its updateDisplayList to have the layout update its scrollRect.
LayoutBase
 Inherited
Retourneert de primitieve waarde van het opgegeven object.
Object
 Inherited
Checks whether an event listener is registered with this EventDispatcher object or any of its ancestors for the specified event type.
OnDemandEventDispatcher
Beschermde methoden
 MethodeGedefinieerd door
 Inherited
Calculates how much to scroll for the specified dropLocation during a drag and drop gesture.
LayoutBase
 Inherited
Returns the index where a new item should be inserted if the user releases the mouse at the specified coordinates while completing a drag and drop gesture.
LayoutBase
 Inherited
Calculates the bounds for the drop indicator that provides visual feedback to the user of where the items will be inserted at the end of a drag and drop gesture.
LayoutBase
 Inherited
Returns the bounds of the first layout element that either spans or is above the scrollRect's top edge.
LayoutBase
 Inherited
Returns the bounds of the first layout element that either spans or is below the scrollRect's bottom edge.
LayoutBase
 Inherited
Returns the bounds of the first layout element that either spans or is to the left of the scrollRect's left edge.
LayoutBase
 Inherited
Returns the bounds of the first layout element that either spans or is to the right of the scrollRect's right edge.
LayoutBase
 Inherited
Returns the bounds of the target's scroll rectangle in layout coordinates.
LayoutBase
 Inherited
Called when the verticalScrollPosition or horizontalScrollPosition properties change.
LayoutBase
Eigenschapdetails
    

horizontalGap

eigenschap
horizontalGap:Number

Taalversie: ActionScript 3.0
Productversie: Flex 4.5
Runtimeversies: AIR 2.5

The horizontal space between columns, in pixels.

De standaardwaarde is 2.

Deze eigenschap kan als de bron voor gegevensbinding worden gebruikt. Wanneer deze eigenschap wordt gewijzigd, wordt de gebeurtenis propertyChange verzonden.



Implementatie
    public function get horizontalGap():Number
    public function set horizontalGap(value:Number):void

Verwante API-elementen

    

requestedMaxColumnCount

eigenschap 
requestedMaxColumnCount:int

Taalversie: ActionScript 3.0
Productversie: Flex 4
Runtimeversies: AIR 1.5

The maximum number of columns to display in a row.

De standaardwaarde is 3.



Implementatie
    public function get requestedMaxColumnCount():int
    public function set requestedMaxColumnCount(value:int):void
    

verticalGap

eigenschap 
verticalGap:Number

Taalversie: ActionScript 3.0
Productversie: Flex 4.5
Runtimeversies: AIR 2.5

The vertical space between rows, in pixels.

De standaardwaarde is 2.

Deze eigenschap kan als de bron voor gegevensbinding worden gebruikt. Wanneer deze eigenschap wordt gewijzigd, wordt de gebeurtenis propertyChange verzonden.



Implementatie
    public function get verticalGap():Number
    public function set verticalGap(value:Number):void

Verwante API-elementen

Constructordetails
    

ViewMenuLayout

()Constructor
public function ViewMenuLayout()

Taalversie: ActionScript 3.0
Productversie: Flex 4.5
Runtimeversies: AIR 2.5

Constructor.





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