Adobe® Flex® 4 Language Reference
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mx.containers.utilityClasses 
ConstraintColumn 
Packagemx.containers.utilityClasses
Classpublic class ConstraintColumn
InheritanceConstraintColumn Inheritance EventDispatcher Inheritance Object
Implements IMXMLObject

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The ConstraintColumn class partitions an absolutely positioned container in the vertical plane. ConstraintColumn instances have 3 sizing options: fixed, percentage, and content. These options dictate the position of the constraint column, the amount of space the constraint column takes in the container, and how the constraint column deals with changes in the size of the container.



Public Properties
 PropertyDefined By
 Inheritedconstructor : Object
A reference to the class object or constructor function for a given object instance.
Object
  explicitWidth : Number
Number that specifies the explicit width of the ConstraintColumn instance, in pixels, in the ConstraintColumn instance's coordinates.
ConstraintColumn
  id : String
ID of the ConstraintColumn instance.
ConstraintColumn
  maxWidth : Number
Number that specifies the maximum width of the ConstraintColumn instance, in pixels, in the ConstraintColumn instance's coordinates.
ConstraintColumn
  minWidth : Number
Number that specifies the minimum width of the ConstraintColumn instance, in pixels, in the ConstraintColumn instance's coordinates.
ConstraintColumn
  percentWidth : Number
Number that specifies the width of a component as a percentage of its parent container's size.
ConstraintColumn
 Inheritedprototype : Object
[static] A reference to the prototype object of a class or function object.
Object
  width : Number
Number that specifies the width of the ConstraintColumn instance, in pixels, in the parent container's coordinates.
ConstraintColumn
Public Methods
 MethodDefined By
  
Constructor.
ConstraintColumn
 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.
EventDispatcher
 Inherited
Dispatches an event into the event flow.
EventDispatcher
 Inherited
Checks whether the EventDispatcher object has any listeners registered for a specific type of event.
EventDispatcher
 Inherited
Indicates whether an object has a specified property defined.
Object
  
Called automatically by the MXML compiler when the ConstraintColumn instance is created using an MXML tag.
ConstraintColumn
 Inherited
Indicates whether an instance of the Object class is in the prototype chain of the object specified as the parameter.
Object
 Inherited
Indicates whether the specified property exists and is enumerable.
Object
 Inherited
removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void
Removes a listener from the EventDispatcher object.
EventDispatcher
  
Sizes the constraint column.
ConstraintColumn
 Inherited
Sets the availability of a dynamic property for loop operations.
Object
 Inherited
Returns the string representation of this object, formatted according to locale-specific conventions.
Object
 Inherited
Returns the string representation of the specified object.
Object
 Inherited
Returns the primitive value of the specified object.
Object
 Inherited
Checks whether an event listener is registered with this EventDispatcher object or any of its ancestors for the specified event type.
EventDispatcher
Events
 Event Summary Defined By
 Inherited[broadcast event] Dispatched when the Flash Player or AIR application gains operating system focus and becomes active.EventDispatcher
 Inherited[broadcast event] Dispatched when the Flash Player or AIR application operating loses system focus and is becoming inactive.EventDispatcher
Property Detail

explicitWidth

property
explicitWidth:Number

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Number that specifies the explicit width of the ConstraintColumn instance, in pixels, in the ConstraintColumn instance's coordinates.

This property can be used as the source for data binding. When this property is modified, it dispatches the explicitWidthChanged event.



Implementation
    public function get explicitWidth():Number
    public function set explicitWidth(value:Number):void

id

property 
id:String

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

ID of the ConstraintColumn instance. This value becomes the instance name of the ConstraintColumn instance and should not contain white space or special characters.



Implementation
    public function get id():String
    public function set id(value:String):void

maxWidth

property 
maxWidth:Number

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Number that specifies the maximum width of the ConstraintColumn instance, in pixels, in the ConstraintColumn instance's coordinates.

This property can be used as the source for data binding. When this property is modified, it dispatches the maxWidthChanged event.



Implementation
    public function get maxWidth():Number
    public function set maxWidth(value:Number):void

minWidth

property 
minWidth:Number

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Number that specifies the minimum width of the ConstraintColumn instance, in pixels, in the ConstraintColumn instance's coordinates.

This property can be used as the source for data binding. When this property is modified, it dispatches the minWidthChanged event.



Implementation
    public function get minWidth():Number
    public function set minWidth(value:Number):void

percentWidth

property 
percentWidth:Number

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Number that specifies the width of a component as a percentage of its parent container's size. Allowed values are 0-100. The default value is NaN. Setting the width property resets this property to NaN.

This property can be used as the source for data binding. When this property is modified, it dispatches the percentWidthChanged event.



Implementation
    public function get percentWidth():Number
    public function set percentWidth(value:Number):void

width

property 
width:Number

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Number that specifies the width of the ConstraintColumn instance, in pixels, in the parent container's coordinates.

This property can be used as the source for data binding. When this property is modified, it dispatches the widthChanged event.



Implementation
    public function get width():Number
    public function set width(value:Number):void
Constructor Detail

ConstraintColumn

()Constructor
public function ConstraintColumn()

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Constructor.

Method Detail

initialized

()method
public function initialized(document:Object, id:String):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Called automatically by the MXML compiler when the ConstraintColumn instance is created using an MXML tag. If you create the ConstraintColumn instance through ActionScript, you must call this method passing in the MXML document and null for the id.

Parameters

document:Object — The MXML document containing this ConstraintColumn.
 
id:String — Ignored.

setActualWidth

()method 
public function setActualWidth(w:Number):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Sizes the constraint column.

Parameters

w:Number — Width of constaint column computed during parent container processing.