ActionScript® 3.0 Reference for the Adobe® Flash® Platform
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spark.layouts 

ConstraintLayout  - AS3 Flex

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adobe.utils
air.desktop
air.net
air.update
air.update.events
coldfusion.air
coldfusion.air.errors
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coldfusion.service
coldfusion.service.events
coldfusion.service.mxml
com.adobe.acm.solutions.authoring.domain.extensions
com.adobe.acm.solutions.ccr.domain.extensions
com.adobe.consulting.pst.vo
com.adobe.dct.component
com.adobe.dct.component.datadictionary
com.adobe.dct.component.datadictionaryElement
com.adobe.dct.component.dataElementsPanel
com.adobe.dct.component.toolbars
com.adobe.dct.event
com.adobe.dct.exp
com.adobe.dct.model
com.adobe.dct.service
com.adobe.dct.service.provider
com.adobe.dct.transfer
com.adobe.dct.util
com.adobe.dct.view
com.adobe.ep.taskmanagement.domain
com.adobe.ep.taskmanagement.event
com.adobe.ep.taskmanagement.filter
com.adobe.ep.taskmanagement.services
com.adobe.ep.taskmanagement.util
com.adobe.ep.ux.attachmentlist.component
com.adobe.ep.ux.attachmentlist.domain
com.adobe.ep.ux.attachmentlist.domain.events
com.adobe.ep.ux.attachmentlist.domain.renderers
com.adobe.ep.ux.attachmentlist.skin
com.adobe.ep.ux.attachmentlist.skin.renderers
com.adobe.ep.ux.content.event
com.adobe.ep.ux.content.factory
com.adobe.ep.ux.content.handlers
com.adobe.ep.ux.content.managers
com.adobe.ep.ux.content.model.asset
com.adobe.ep.ux.content.model.preview
com.adobe.ep.ux.content.model.relation
com.adobe.ep.ux.content.model.search
com.adobe.ep.ux.content.model.toolbar
com.adobe.ep.ux.content.search
com.adobe.ep.ux.content.services
com.adobe.ep.ux.content.services.load
com.adobe.ep.ux.content.services.permissions
com.adobe.ep.ux.content.services.preview
com.adobe.ep.ux.content.services.providers
com.adobe.ep.ux.content.services.query
com.adobe.ep.ux.content.services.relationships
com.adobe.ep.ux.content.services.search.lccontent
com.adobe.ep.ux.content.services.version
com.adobe.ep.ux.content.view
com.adobe.ep.ux.content.view.components.activate
com.adobe.ep.ux.content.view.components.grid
com.adobe.ep.ux.content.view.components.grid.hover
com.adobe.ep.ux.content.view.components.grid.hover.component
com.adobe.ep.ux.content.view.components.grid.renderers
com.adobe.ep.ux.content.view.components.relationships
com.adobe.ep.ux.content.view.components.review
com.adobe.ep.ux.content.view.components.search.renderers
com.adobe.ep.ux.content.view.components.searchpod
com.adobe.ep.ux.content.view.components.toolbar
com.adobe.ep.ux.content.view.components.toolbar.controlRenderers
com.adobe.ep.ux.content.view.components.version
com.adobe.ep.ux.documentsubmit.component
com.adobe.ep.ux.documentsubmit.domain
com.adobe.ep.ux.documentsubmit.skin
com.adobe.ep.ux.taskaction.component
com.adobe.ep.ux.taskaction.domain
com.adobe.ep.ux.taskaction.domain.events
com.adobe.ep.ux.taskaction.skin
com.adobe.ep.ux.taskdetails.component
com.adobe.ep.ux.taskdetails.domain
com.adobe.ep.ux.taskdetails.skin
com.adobe.ep.ux.tasklist.component
com.adobe.ep.ux.tasklist.domain
com.adobe.ep.ux.tasklist.skin
com.adobe.ep.ux.webdocumentviewer.domain
com.adobe.exm.expression
com.adobe.exm.expression.error
com.adobe.exm.expression.event
com.adobe.exm.expression.impl
com.adobe.fiber.runtime.lib
com.adobe.fiber.services
com.adobe.fiber.services.wrapper
com.adobe.fiber.styles
com.adobe.fiber.util
com.adobe.fiber.valueobjects
com.adobe.gravity.binding
com.adobe.gravity.context
com.adobe.gravity.flex.bundleloader
com.adobe.gravity.flex.progress
com.adobe.gravity.flex.serviceloader
com.adobe.gravity.framework
com.adobe.gravity.init
com.adobe.gravity.service.bundleloader
com.adobe.gravity.service.logging
com.adobe.gravity.service.manifest
com.adobe.gravity.service.progress
com.adobe.gravity.tracker
com.adobe.gravity.ui
com.adobe.gravity.utility
com.adobe.gravity.utility.async
com.adobe.gravity.utility.error
com.adobe.gravity.utility.events
com.adobe.gravity.utility.factory
com.adobe.gravity.utility.flex.async
com.adobe.gravity.utility.logging
com.adobe.gravity.utility.message
com.adobe.gravity.utility.sequence
com.adobe.gravity.utility.url
com.adobe.guides.control
com.adobe.guides.domain
com.adobe.guides.i18n
com.adobe.guides.spark.components.skins
com.adobe.guides.spark.components.skins.mx
com.adobe.guides.spark.headers.components
com.adobe.guides.spark.headers.skins
com.adobe.guides.spark.layouts.components
com.adobe.guides.spark.layouts.skins
com.adobe.guides.spark.navigators.components
com.adobe.guides.spark.navigators.renderers
com.adobe.guides.spark.navigators.skins
com.adobe.guides.spark.util
com.adobe.guides.spark.wrappers.components
com.adobe.guides.spark.wrappers.skins
com.adobe.guides.submit
com.adobe.icc.dc.domain
com.adobe.icc.dc.domain.factory
com.adobe.icc.editors.events
com.adobe.icc.editors.handlers
com.adobe.icc.editors.managers
com.adobe.icc.editors.model
com.adobe.icc.editors.model.config
com.adobe.icc.editors.model.el
com.adobe.icc.editors.model.el.operands
com.adobe.icc.editors.model.el.operators
com.adobe.icc.enum
com.adobe.icc.external.dc
com.adobe.icc.obj
com.adobe.icc.services
com.adobe.icc.services.category
com.adobe.icc.services.config
com.adobe.icc.services.download
com.adobe.icc.services.export
com.adobe.icc.services.external
com.adobe.icc.services.formbridge
com.adobe.icc.services.fragmentlayout
com.adobe.icc.services.layout
com.adobe.icc.services.letter
com.adobe.icc.services.locator
com.adobe.icc.services.module
com.adobe.icc.services.render
com.adobe.icc.services.submit
com.adobe.icc.services.user
com.adobe.icc.token
com.adobe.icc.vo
com.adobe.icc.vo.render
com.adobe.icomm.assetplacement.controller
com.adobe.icomm.assetplacement.controller.utils
com.adobe.icomm.assetplacement.data
com.adobe.icomm.assetplacement.model
com.adobe.livecycle.assetmanager.client
com.adobe.livecycle.assetmanager.client.event
com.adobe.livecycle.assetmanager.client.handler
com.adobe.livecycle.assetmanager.client.managers
com.adobe.livecycle.assetmanager.client.model
com.adobe.livecycle.assetmanager.client.model.cms
com.adobe.livecycle.assetmanager.client.service
com.adobe.livecycle.assetmanager.client.service.search
com.adobe.livecycle.assetmanager.client.service.search.cms
com.adobe.livecycle.assetmanager.client.utils
com.adobe.livecycle.content
com.adobe.livecycle.rca.model
com.adobe.livecycle.rca.model.constant
com.adobe.livecycle.rca.model.document
com.adobe.livecycle.rca.model.participant
com.adobe.livecycle.rca.model.reminder
com.adobe.livecycle.rca.model.stage
com.adobe.livecycle.rca.service
com.adobe.livecycle.rca.service.core
com.adobe.livecycle.rca.service.core.delegate
com.adobe.livecycle.rca.service.process
com.adobe.livecycle.rca.service.process.delegate
com.adobe.livecycle.rca.token
com.adobe.livecycle.ria.security.api
com.adobe.livecycle.ria.security.service
com.adobe.mosaic.layouts
com.adobe.mosaic.layouts.dragAndDrop
com.adobe.mosaic.layouts.interfaces
com.adobe.mosaic.mxml
com.adobe.mosaic.om.constants
com.adobe.mosaic.om.events
com.adobe.mosaic.om.impl
com.adobe.mosaic.om.interfaces
com.adobe.mosaic.skinning
com.adobe.mosaic.sparklib.editors
com.adobe.mosaic.sparklib.optionMenu
com.adobe.mosaic.sparklib.scrollableMenu
com.adobe.mosaic.sparklib.scrollableMenu.skins
com.adobe.mosaic.sparklib.tabLayout
com.adobe.mosaic.sparklib.tabLayout.events
com.adobe.mosaic.sparklib.tabLayout.layouts
com.adobe.mosaic.sparklib.tabLayout.skins
com.adobe.mosaic.sparklib.text
com.adobe.mosaic.sparklib.util
com.adobe.solutions.acm.authoring.presentation
com.adobe.solutions.acm.authoring.presentation.actionbar
com.adobe.solutions.acm.authoring.presentation.common
com.adobe.solutions.acm.authoring.presentation.events
com.adobe.solutions.acm.authoring.presentation.fragment
com.adobe.solutions.acm.authoring.presentation.letter
com.adobe.solutions.acm.authoring.presentation.letter.data
com.adobe.solutions.acm.authoring.presentation.preview
com.adobe.solutions.acm.authoring.presentation.rte
com.adobe.solutions.acm.ccr.presentation
com.adobe.solutions.acm.ccr.presentation.contentcapture
com.adobe.solutions.acm.ccr.presentation.contentcapture.events
com.adobe.solutions.acm.ccr.presentation.contentcapture.preview
com.adobe.solutions.acm.ccr.presentation.datacapture
com.adobe.solutions.acm.ccr.presentation.datacapture.renderers
com.adobe.solutions.acm.ccr.presentation.pdf
com.adobe.solutions.exm
com.adobe.solutions.exm.authoring
com.adobe.solutions.exm.authoring.components.controls
com.adobe.solutions.exm.authoring.components.toolbars
com.adobe.solutions.exm.authoring.domain
com.adobe.solutions.exm.authoring.domain.expression
com.adobe.solutions.exm.authoring.domain.impl
com.adobe.solutions.exm.authoring.domain.method
com.adobe.solutions.exm.authoring.domain.variable
com.adobe.solutions.exm.authoring.enum
com.adobe.solutions.exm.authoring.events
com.adobe.solutions.exm.authoring.model
com.adobe.solutions.exm.authoring.renderer
com.adobe.solutions.exm.authoring.view
com.adobe.solutions.exm.expression
com.adobe.solutions.exm.impl
com.adobe.solutions.exm.impl.method
com.adobe.solutions.exm.method
com.adobe.solutions.exm.mock
com.adobe.solutions.exm.mock.method
com.adobe.solutions.exm.runtime
com.adobe.solutions.exm.runtime.impl
com.adobe.solutions.exm.variable
com.adobe.solutions.prm.constant
com.adobe.solutions.prm.domain
com.adobe.solutions.prm.domain.factory
com.adobe.solutions.prm.domain.impl
com.adobe.solutions.prm.domain.manager
com.adobe.solutions.prm.presentation.asset
com.adobe.solutions.prm.presentation.constant
com.adobe.solutions.prm.presentation.document
com.adobe.solutions.prm.presentation.event
com.adobe.solutions.prm.presentation.file
com.adobe.solutions.prm.presentation.project
com.adobe.solutions.prm.presentation.team
com.adobe.solutions.prm.presentation.util
com.adobe.solutions.prm.service
com.adobe.solutions.prm.services.impl
com.adobe.solutions.prm.vo
com.adobe.solutions.rca.constant
com.adobe.solutions.rca.domain
com.adobe.solutions.rca.domain.common
com.adobe.solutions.rca.domain.factory
com.adobe.solutions.rca.domain.impl
com.adobe.solutions.rca.domain.impl.manager
com.adobe.solutions.rca.domain.manager
com.adobe.solutions.rca.presentation
com.adobe.solutions.rca.presentation.comment
com.adobe.solutions.rca.presentation.constant
com.adobe.solutions.rca.presentation.event
com.adobe.solutions.rca.presentation.gantt
com.adobe.solutions.rca.presentation.gantt.ruler
com.adobe.solutions.rca.presentation.template
com.adobe.solutions.rca.presentation.template.audit
com.adobe.solutions.rca.presentation.template.definition
com.adobe.solutions.rca.presentation.template.documents
com.adobe.solutions.rca.presentation.template.stages
com.adobe.solutions.rca.presentation.util
com.adobe.solutions.rca.service
com.adobe.solutions.rca.services.impl
com.adobe.solutions.rca.vo
com.adobe.solutions.rca.vo.um
com.adobe.viewsource
fl.accessibility
fl.containers
fl.controls
fl.controls.dataGridClasses
fl.controls.listClasses
fl.controls.progressBarClasses
fl.core
fl.data
fl.display
fl.events
fl.ik
fl.lang
fl.livepreview
fl.managers
fl.motion
fl.motion.easing
fl.rsl
fl.text
fl.transitions
fl.transitions.easing
fl.video
flash.accessibility
flash.concurrent
flash.crypto
flash.data
flash.desktop
flash.display
flash.display3D
flash.display3D.textures
flash.errors
flash.events
flash.external
flash.filesystem
flash.filters
flash.geom
flash.globalization
flash.html
flash.media
flash.net
flash.net.dns
flash.net.drm
flash.notifications
flash.permissions
flash.printing
flash.profiler
flash.sampler
flash.security
flash.sensors
flash.system
flash.text
flash.text.engine
flash.text.ime
flash.ui
flash.utils
flash.xml
flashx.textLayout
flashx.textLayout.compose
flashx.textLayout.container
flashx.textLayout.conversion
flashx.textLayout.edit
flashx.textLayout.elements
flashx.textLayout.events
flashx.textLayout.factory
flashx.textLayout.formats
flashx.textLayout.operations
flashx.textLayout.utils
flashx.undo
ga.controls
ga.layouts
ga.model
ga.uiComponents
ga.util
ga.views
ga.wrappers
lc.foundation
lc.foundation.domain
lc.foundation.events
lc.foundation.ui
lc.foundation.util
lc.preloader
lc.procmgmt
lc.procmgmt.commands
lc.procmgmt.domain
lc.procmgmt.events
lc.procmgmt.formbridge
lc.procmgmt.impl
lc.procmgmt.ui.attachments
lc.procmgmt.ui.controls
lc.procmgmt.ui.controls.card
lc.procmgmt.ui.controls.renderer
lc.procmgmt.ui.help
lc.procmgmt.ui.layout
lc.procmgmt.ui.presentationmodel
lc.procmgmt.ui.process
lc.procmgmt.ui.search
lc.procmgmt.ui.startpoint
lc.procmgmt.ui.task
lc.procmgmt.ui.task.form
lc.procmgmt.ui.task.form.commands
lc.procmgmt.ui.tracking
mx.accessibility
mx.automation
mx.automation.air
mx.automation.delegates
mx.automation.delegates.advancedDataGrid
mx.automation.delegates.charts
mx.automation.delegates.containers
mx.automation.delegates.controls
mx.automation.delegates.controls.dataGridClasses
mx.automation.delegates.controls.fileSystemClasses
mx.automation.delegates.core
mx.automation.delegates.flashflexkit
mx.automation.events
mx.binding
mx.binding.utils
mx.charts
mx.charts.chartClasses
mx.charts.effects
mx.charts.effects.effectClasses
mx.charts.events
mx.charts.renderers
mx.charts.series
mx.charts.series.items
mx.charts.series.renderData
mx.charts.styles
mx.collections
mx.collections.errors
mx.containers
mx.containers.accordionClasses
mx.containers.dividedBoxClasses
mx.containers.errors
mx.containers.utilityClasses
mx.controls
mx.controls.advancedDataGridClasses
mx.controls.dataGridClasses
mx.controls.listClasses
mx.controls.menuClasses
mx.controls.olapDataGridClasses
mx.controls.scrollClasses
mx.controls.sliderClasses
mx.controls.textClasses
mx.controls.treeClasses
mx.controls.videoClasses
mx.core
mx.core.windowClasses
mx.data
mx.data.crypto
mx.data.errors
mx.data.events
mx.data.messages
mx.data.mxml
mx.data.offline.errors
mx.data.utils
mx.effects
mx.effects.easing
mx.effects.effectClasses
mx.events
mx.filters
mx.flash
mx.formatters
mx.geom
mx.graphics
mx.graphics.codec
mx.graphics.shaderClasses
mx.logging
mx.logging.errors
mx.logging.targets
mx.managers
mx.messaging
mx.messaging.channels
mx.messaging.config
mx.messaging.errors
mx.messaging.events
mx.messaging.management
mx.messaging.messages
mx.modules
mx.netmon
mx.olap
mx.olap.aggregators
mx.preloaders
mx.printing
mx.resources
mx.rpc
mx.rpc.events
mx.rpc.http
mx.rpc.http.mxml
mx.rpc.livecycle
mx.rpc.mxml
mx.rpc.remoting
mx.rpc.remoting.mxml
mx.rpc.soap
mx.rpc.soap.mxml
mx.rpc.wsdl
mx.rpc.xml
mx.skins
mx.skins.halo
mx.skins.spark
mx.skins.wireframe
mx.skins.wireframe.windowChrome
mx.states
mx.styles
mx.utils
mx.validators
org.osmf.containers
org.osmf.display
org.osmf.elements
org.osmf.events
org.osmf.layout
org.osmf.logging
org.osmf.media
org.osmf.metadata
org.osmf.net
org.osmf.net.dvr
org.osmf.net.httpstreaming
org.osmf.net.metrics
org.osmf.net.qos
org.osmf.net.rtmpstreaming
org.osmf.net.rules
org.osmf.traits
org.osmf.utils
spark.accessibility
spark.automation.delegates
spark.automation.delegates.components
spark.automation.delegates.components.gridClasses
spark.automation.delegates.components.mediaClasses
spark.automation.delegates.components.supportClasses
spark.automation.delegates.skins.spark
spark.automation.events
spark.collections
spark.components
spark.components.calendarClasses
spark.components.gridClasses
spark.components.mediaClasses
spark.components.supportClasses
spark.components.windowClasses
spark.core
spark.effects
spark.effects.animation
spark.effects.easing
spark.effects.interpolation
spark.effects.supportClasses
spark.events
spark.filters
spark.formatters
spark.formatters.supportClasses
spark.globalization
spark.globalization.supportClasses
spark.layouts
spark.layouts.supportClasses
spark.managers
spark.modules
spark.preloaders
spark.primitives
spark.primitives.supportClasses
spark.skins
spark.skins.mobile
spark.skins.mobile.supportClasses
spark.skins.spark
spark.skins.spark.mediaClasses.fullScreen
spark.skins.spark.mediaClasses.normal
spark.skins.spark.windowChrome
spark.skins.wireframe
spark.skins.wireframe.mediaClasses
spark.skins.wireframe.mediaClasses.fullScreen
spark.transitions
spark.utils
spark.validators
spark.validators.supportClasses
xd.core.axm.enterprise.view.components
xd.core.axm.enterprise.view.skins
xd.core.axm.view.components
xd.core.axm.view.components.support

Language Elements

Global Constants
Global Functions
Operators
Statements, Keywords & Directives
Special Types

Appendixes

What's New
Compiler Errors
Compiler Warnings
Run-Time Errors
Migrating to ActionScript 3
Supported Character Sets
MXML Only Tags
Motion XML Elements
Timed Text Tags
List of deprecated elements
Accessibility Implementation Constants
How to Use ActionScript Examples
Legal notices
Packagespark.layouts
Classpublic class ConstraintLayout
InheritanceConstraintLayout Inheritance LayoutBase Inheritance OnDemandEventDispatcher Inheritance Object
Subclasses FormItemLayout

Language Version: ActionScript 3.0
Product Version: Flex 4.5
Runtime Versions: Flash Player 10, AIR 1.5

The ConstraintLayout class arranges the layout elements based on their individual settings and a set of constraint regions defined by constraint columns and constraint rows. Although you can use all of the properties and constraints from BasicLayout to position and size elements, ConstraintLayout gives you the ability to create sibling-relative layouts by constraining elements to the specified columns and rows.

Note: The Spark list-based controls (the Spark List control and its subclasses such as ButtonBar, ComboBox, DropDownList, and TabBar) do not support the ConstraintLayout class. Do not use ConstraintLayout with the Spark list-based controls.

Per-element supported constraints are left, right, top, bottom, baseline, percentWidth, and percentHeight. Element's minimum and maximum sizes will always be respected.

Columns and rows may have an explicit size or content size (no explicit size). Explicit size regions will be fixed at their specified size, while content size regions will stretch to fit only the elements constrained to them. If multiple content size regions are spanned by an element, the space will be divided equally among the content size regions.

The measured size of the container is calculated from the elements, their constraints, their preferred sizes, and the sizes of the rows and columns. The size of each row and column is just big enough to hold all of the elements constrained to it at their preferred sizes with constraints satisfied. The measured size of the container is big enough to hold all of the columns and rows as well as any other elements left at their preferred sizes with constraints satisfied.

During a call to the updateDisplayList() method, the element's size is determined according to the rules in the following order of precedence (the element's minimum and maximum sizes are always respected):

  • If the element has percentWidth or percentHeight set, then its size is calculated as a percentage of the available size, where the available size is the region or container size minus any left, right, top, or bottom constraints.
  • If the element has both left and right constraints, it's width is set to be the region's or container's width minus the left and right constraints.
  • If the element has both top and bottom constraints, it's height is set to be the container's height minus the top and bottom constraints.
  • The element is set to its preferred width and/or height.

The element's position is determined according to the rules in the following order of precedence:

  • If element's baseline is specified, then the element is positioned in the vertical direction such that its baselinePosition (usually the base line of its first line of text) is aligned with baseline constraint.
  • If element's top or left constraints are specified, then the element is positioned such that the top-left corner of the element's layout bounds is offset from the top-left corner of the container by the specified values.
  • If element's bottom or right constraints are specified, then the element is positioned such that the bottom-right corner of the element's layout bounds is offset from the bottom-right corner of the container by the specified values.
  • When no constraints determine the position in the horizontal or vertical direction, the element is positioned according to its x and y coordinates.

The content size of the container is calculated as the maximum of the coordinates of the bottom-right corner of all the layout elements and constraint regions.



Public Properties
 PropertyDefined By
 InheritedclipAndEnableScrolling : Boolean
If true, specifies to clip the children to the boundaries of the viewport.
LayoutBase
  constraintColumns : Vector.<ConstraintColumn>
A Vector of ConstraintColumn instances that partition the target container.
ConstraintLayout
  constraintRows : Vector.<ConstraintRow>
A Vector of ConstraintRow instances that partition the target container.
ConstraintLayout
 Inheritedconstructor : Object
A reference to the class object or constructor function for a given object instance.
Object
 InheriteddropIndicator : DisplayObject
The DisplayObject that this layout uses for the drop indicator during a drag-and-drop operation.
LayoutBase
 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
 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
 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
Public Methods
 MethodDefined By
  
Constructor.
ConstraintLayout
 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
Indicates whether an object has a specified property defined.
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
Indicates whether an instance of the Object class is in the prototype chain of the object specified as the parameter.
Object
 Inherited
Measures the target's default size based on its content, and optionally measures the target's default minimum size.
LayoutBase
 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.
OnDemandEventDispatcher
 Inherited
Sets the availability of a dynamic property for loop operations.
Object
 Inherited
Sizes, positions and parents the drop indicator based on the specified drop location.
LayoutBase
 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
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
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.
OnDemandEventDispatcher
Protected Methods
 MethodDefined By
 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
  
layoutContent(unscaledWidth:Number, unscaledHeight:Number):void
Lays out the elements of the layout target using the current widths and heights of the columns and rows.
ConstraintLayout
  
measureAndPositionColumnsAndRows(constrainedWidth:Number = NaN, constrainedHeight:Number = NaN):void
Used by FormItemLayout to measure and set new column widths and row heights before laying out the elements.
ConstraintLayout
 Inherited
Called when the verticalScrollPosition or horizontalScrollPosition properties change.
LayoutBase
Property Detail

constraintColumns

property
constraintColumns:Vector.<ConstraintColumn>

Language Version: ActionScript 3.0
Product Version: Flex 4.5
Runtime Versions: Flash Player 10, AIR 1.5

A Vector of ConstraintColumn instances that partition the target container. The ConstraintColumn instance at index 0 is the left-most column; indices increase from left to right.



Implementation
    public function get constraintColumns():Vector.<ConstraintColumn>
    public function set constraintColumns(value:Vector.<ConstraintColumn>):void

constraintRows

property 
constraintRows:Vector.<ConstraintRow>

Language Version: ActionScript 3.0
Product Version: Flex 4.5
Runtime Versions: Flash Player 10, AIR 1.5

A Vector of ConstraintRow instances that partition the target container. The ConstraintRow instance at index 0 is the top-most column; indices increase from top to bottom.



Implementation
    public function get constraintRows():Vector.<ConstraintRow>
    public function set constraintRows(value:Vector.<ConstraintRow>):void
Constructor Detail

ConstraintLayout

()Constructor
public function ConstraintLayout()

Language Version: ActionScript 3.0
Product Version: Flex 4.5
Runtime Versions: Flash Player 10, AIR 1.5

Constructor.

Method Detail

layoutContent

()method
protected function layoutContent(unscaledWidth:Number, unscaledHeight:Number):void

Language Version: ActionScript 3.0
Product Version: Flex 4.5
Runtime Versions: Flash Player 10, AIR 1.5

Lays out the elements of the layout target using the current widths and heights of the columns and rows. Used by FormItemLayout after setting new column widths to lay elements using those new widths.

Parameters

unscaledWidth:Number — Specifies the width of the component, in pixels, in the component's coordinates, regardless of the value of the scaleX property of the component.
 
unscaledHeight:Number — Specifies the height of the component, in pixels, in the component's coordinates, regardless of the value of the scaleY property of the component.

measureAndPositionColumnsAndRows

()method 
protected function measureAndPositionColumnsAndRows(constrainedWidth:Number = NaN, constrainedHeight:Number = NaN):void

Language Version: ActionScript 3.0
Product Version: Flex 4.5
Runtime Versions: Flash Player 10, AIR 1.5

Used by FormItemLayout to measure and set new column widths and row heights before laying out the elements.

Parameters

constrainedWidth:Number (default = NaN) — The total width available for columns to stretch or shrink their percent width columns. If NaN, percent width columns are unconstrained and fit to their content.
 
constrainedHeight:Number (default = NaN) — The total height available for rows to stretch or shrink their percent height rows. If NaN, percent height rows are unconstrained and fit to their content.