| Package | flashx.textLayout.compose |
| Class | public class StandardFlowComposer |
| Inheritance | StandardFlowComposer  FlowComposerBase Object |
| Implements | IFlowComposer |
| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
Each call to compose() or updateAllControllers() normalizes the text flow as a first step.
The normalizing process checks the parts of the TextFlow object that were modified and takes the following steps:
- Deletes empty FlowLeafElement and SubParagraphGroupElement objects.
- Merges sibling spans that have identical attributes.
- Adds an empty paragraph if a flow is empty.
To use a StandardFlowComposer, assign it to the
flowComposer property of a TextFlow object. Call the updateAllControllers()
method to lay out and display the text in the containers attached to the flow composer.
Note: For simple, static text flows, you can also use the one of the text line factory classes. These factory classes will typically create lines with less overhead than a flow composer, but do not support editing, dynamic changes, or user interaction.
More examples
Related API Elements
Hide Inherited Public Properties
Show Inherited Public Properties| Property | Defined By | ||
|---|---|---|---|
| composing : Boolean [read-only]
True, if the flow composer is currently performing a composition operation. | StandardFlowComposer | ||
 | constructor : Object
A reference to the class object or constructor function for a given object instance. | Object | |
| damageAbsoluteStart : int [read-only]
The absolute position immediately preceding the first element in the text
flow that requires composition and updating. | FlowComposerBase | |
| numControllers : int [read-only]
The number of containers assigned to this IFlowComposer instance. | StandardFlowComposer | ||
| numLines : int [read-only]
The total number of lines composed in the flow. | FlowComposerBase | |
| rootElement : ContainerFormattedElement [read-only]
The root element associated with this IFlowComposer instance. | StandardFlowComposer | ||
| swfContext : ISWFContext
The ISWFContext instance used to make FTE calls as needed. | FlowComposerBase | |
| textFlow : flashx.textLayout.elements:TextFlow [read-only]
The TextFlow object to which this flow composer is attached. | FlowComposerBase | |
| Method | Defined By | ||
|---|---|---|---|
Creates a StandardFlowComposer object. | StandardFlowComposer | ||
Adds a controller to this IFlowComposer instance. | StandardFlowComposer | ||
Adds a controller to this IFlowComposer instance at the specified index. | StandardFlowComposer | ||
Calculates how many lines are necessary to display the content in the root element of the flow and the positions of these
lines in the flow's display containers. | StandardFlowComposer | ||
Composes the content of the root element up to and including the container at the specified index. | StandardFlowComposer | ||
Composes the content of the root element up to the specified position. | StandardFlowComposer | ||
| Mark lines as damaged and needing a recompose. | FlowComposerBase | |
Returns the index of the controller containing the content at the specified position. | StandardFlowComposer | ||
| findLineAtPosition(absolutePosition:int, preferPrevious:Boolean = false):flashx.textLayout.compose:TextFlowLine
Returns the TextFlowLine object containing the content at the specified position. | FlowComposerBase | |
|
Returns the sequential line number of the TextFlowLine object that contains the content at the specified position. | FlowComposerBase | |
Returns the absolute position of the first content element in the specified ContainerController object. | StandardFlowComposer | ||
Returns the ContainerController object at the specified index. | StandardFlowComposer | ||
Returns the index of the specified ContainerController object. | StandardFlowComposer | ||
|
Returns the line with the specified line number. | FlowComposerBase | |
|
Indicates whether an object has a specified property defined. | Object | |
Called by the TextFlow when the interaction manager changes. | StandardFlowComposer | ||
|
Indicates whether any TextFlowLine objects between the beginning of the flow and the line containing the content at
the specified position are marked as damaged. | FlowComposerBase | |
|
Indicates whether an instance of the Object class is in the prototype chain of the object specified
as the parameter. | Object | |
|
Indicates whether the specified property exists and is enumerable. | Object | |
Removes all controllers from this IFlowComposer instance. | StandardFlowComposer | ||
Removes a controller from this IFlowComposer instance. | StandardFlowComposer | ||
Removes the controller at the specified index from this IFlowComposer instance. | StandardFlowComposer | ||
Sets the focus to the container that contains the location specified by the absolutePosition
parameter. | StandardFlowComposer | ||
|
Sets the availability of a dynamic property for loop operations. | Object | |
| StandardFlowComposer | |||
|
Returns the string representation of this object, formatted according to locale-specific conventions. | Object | |
|
Returns the string representation of the specified object. | Object | |
Composes the content of the root element and updates the display. | StandardFlowComposer | ||
| Update the lengths in the lines to maintain mapping to the TextFlow. | FlowComposerBase | |
Composes and updates the display up to and including the container at the specified index. | StandardFlowComposer | ||
|
Returns the primitive value of the specified object. | Object | |
| Method | Defined By | ||
|---|---|---|---|
Returns true if composition is necessary, false otherwise | StandardFlowComposer | ||
composing | property |
numControllers | property |
rootElement | property |
rootElement:ContainerFormattedElement [read-only] | Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
The root element associated with this IFlowComposer instance.
Only a TextFlow object can be a root element.
Implementation
public function get rootElement():ContainerFormattedElementStandardFlowComposer | () | Constructor |
public function StandardFlowComposer()| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
Creates a StandardFlowComposer object.
To use an StandardFlowComposer object, assign it to the
flowComposer property of a TextFlow object. Call the updateAllControllers()
method to lay out and display the text in the containers attached to the flow composer.
Example ( How to use this example )
package flashx.textLayout.compose.examples
{
import flashx.textLayout.elements.TextFlow;
import flashx.textLayout.compose.StandardFlowComposer;
public class StandardFlowComposer_constructor
{
public function createComposer(textFlow:TextFlow):void
{
textFlow.flowComposer = new StandardFlowComposer();
}
}
}
addController | () | method |
public function addController(controller:ContainerController):void| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
Adds a controller to this IFlowComposer instance.
The container is added to the end of the container list.
Parameters
controller:ContainerController — The ContainerController object to add.
|
Example ( How to use this example )
package flashx.textLayout.compose.examples
{
public class StandardFlowComposer_addController
{
import flash.display.Sprite;
import flashx.textLayout.elements.TextFlow;
import flashx.textLayout.container.ContainerController;
public function setupController(textFlow:TextFlow):void
{
var container:Sprite = new Sprite();
var controller:ContainerController = new ContainerController( container, 400, 200 );
textFlow.flowComposer.addController( controller );
}
}
}
addControllerAt | () | method |
public function addControllerAt(controller:ContainerController, index:int):void| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
Adds a controller to this IFlowComposer instance at the specified index.
The list of controllers is 0-based (the first controller has an index of 0).
Parameters
controller:ContainerController — The ContainerController object to add.
| |
index:int — A numeric index that specifies the position in the controller list at which to insert the ContainerController object.
|
Example ( How to use this example )
package flashx.textLayout.compose.examples
{
public class StandardFlowComposer_addControllerAt
{
import flash.display.Sprite;
import flashx.textLayout.elements.TextFlow;
import flashx.textLayout.container.ContainerController;
public function setupController(textFlow:TextFlow):void
{
var container:Sprite = new Sprite();
var controller:ContainerController = new ContainerController( container, 400, 200 );
textFlow.flowComposer.addControllerAt( controller, 0 );
}
}
}
compose | () | method |
public function compose():Boolean| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
Calculates how many lines are necessary to display the content in the root element of the flow and the positions of these lines in the flow's display containers.
The compose() method only composes content if it has changed since the last composition operation.
Results are saved so that subsequent
calls to compose() or updateAllControllers() do not perform an additional recomposition
if the flow content has not changed.
If the contents of any container have changed, the method returns true.
Boolean — true if anything changed.
|
Related API Elements
Example ( How to use this example )
package flashx.textLayout.compose.examples
{
public class StandardFlowComposer_compose
{
import flashx.textLayout.elements.TextFlow;
public function compose(textFlow:TextFlow):void
{
textFlow.flowComposer.compose();
}
}
}
composeToController | () | method |
public function composeToController(index:int):Boolean| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
Composes the content of the root element up to and including the container at the specified index.
If the contents of any container up to and including the container at the specified
index has changed, the method returns true. If index is greater than the number of controllers
(or not specified), then all containers are composed.
Parameters
index:int (default = NaN) |
Boolean — true if anything changed.
|
Example ( How to use this example )
package flashx.textLayout.compose.examples
{
public class StandardFlowComposer_composeToController
{
import flashx.textLayout.elements.TextFlow;
public function compose(textFlow:TextFlow):void
{
textFlow.flowComposer.composeToController( 3 );
}
}
}
composeToPosition | () | method |
public function composeToPosition(absolutePosition:int):Boolean| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
Composes the content of the root element up to the specified position.
If the contents of any container up to and including the container holding the content at the specified
position has changed, the method returns true. If absolutePosition is greater than the length of the TextFlow
(or not specified), then the entire flow is composed.
Parameters
absolutePosition:int (default = NaN) |
Boolean — true if anything changed.
|
Example ( How to use this example )
package flashx.textLayout.compose.examples
{
public class StandardFlowComposer_composeToPosition
{
import flashx.textLayout.elements.TextFlow;
public function compose(textFlow:TextFlow):void
{
textFlow.flowComposer.composeToPosition( 344 );
}
}
}
findControllerIndexAtPosition | () | method |
public function findControllerIndexAtPosition(absolutePosition:int, preferPrevious:Boolean = false):int| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
Returns the index of the controller containing the content at the specified position.
A position can be considered to be the division between two characters or other elements of a text flow. If
the value in absolutePosition is a position between the last character of one
container and the first character of the next, then the preceding container is returned if
the preferPrevious parameter is set to true and the later container is returned if
the preferPrevious parameter is set to false.
The method returns -1 if the content at the specified position is not in any container or is outside the range of positions in the text flow.
Parameters
absolutePosition:int — The position of the content for which the container index is sought.
| |
preferPrevious:Boolean (default = false) |
int — the index of the container controller or -1 if not found.
|
Example ( How to use this example )
package flashx.textLayout.compose.examples
{
import flashx.textLayout.elements.TextFlow;
import flashx.textLayout.compose.StandardFlowComposer;
public class StandardFlowComposer_findControllerIndexAtPosition
{
public function findControllerIndexAtPosition(textFlow:TextFlow):void
{
var index:int = textFlow.flowComposer.findControllerIndexAtPosition( 344 );
}
}
}
getAbsoluteStart | () | method |
public function getAbsoluteStart(controller:ContainerController):int| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
Returns the absolute position of the first content element in the specified ContainerController object.
A position is calculated by counting the division between two characters or other elements of a text flow. The position preceding the first element of a flow is zero. An absolute position is the position counting from the beginning of the flow.
Parameters
controller:ContainerController — A ContainerController object associated with this flow composer.
|
int — the position before the first character or graphic in the ContainerController.
|
getControllerAt | () | method |
public function getControllerAt(index:int):ContainerController| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
Returns the ContainerController object at the specified index.
Parameters
index:int — The index of the ContainerController object to return.
|
ContainerController — the ContainerController object at the specified position.
|
Example ( How to use this example )
package flashx.textLayout.compose.examples
{
import flashx.textLayout.elements.TextFlow;
import flashx.textLayout.container.ContainerController;
public class StandardFlowComposer_getControllerAt
{
public function findControllerIndexAtPosition(textFlow:TextFlow):void
{
var controller:ContainerController = textFlow.flowComposer.getControllerAt( 0 );
}
}
}
getControllerIndex | () | method |
public function getControllerIndex(controller:ContainerController):int| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
Returns the index of the specified ContainerController object.
Parameters
controller:ContainerController — A reference to the ContainerController object to find.
|
int — the index of the specified ContainerController object or -1 if the controller is not attached to this flow composer.
|
Example ( How to use this example )
package flashx.textLayout.compose.examples
{
import flashx.textLayout.elements.TextFlow;
import flashx.textLayout.container.ContainerController;
public class StandardFlowComposer_getControllerIndex
{
public function getControllerIndex(textFlow:TextFlow, controller:ContainerController):void
{
var index:int = textFlow.flowComposer.getControllerIndex( controller );
}
}
}
interactionManagerChanged | () | method |
public function interactionManagerChanged(newInteractionManager:ISelectionManager):void| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
Called by the TextFlow when the interaction manager changes.
This function is called automatically. Your code does not typically need to call this method. Classes that extend StandardFlowComposer can override this method to update event listeners and other properties that depend on the interaction manager.
Parameters
newInteractionManager:ISelectionManager — The new ISelectionManager instance.
|
preCompose | () | method |
removeAllControllers | () | method |
public function removeAllControllers():void| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
Removes all controllers from this IFlowComposer instance.
removeController | () | method |
public function removeController(controller:ContainerController):void| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
Removes a controller from this IFlowComposer instance.
Parameters
controller:ContainerController — The ContainerController instance to remove.
|
removeControllerAt | () | method |
setFocus | () | method |
public function setFocus(absolutePosition:int, leanLeft:Boolean = false):void| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
Sets the focus to the container that contains the location specified by the absolutePosition
parameter.
The StandardFlowComposer calls the setFocus() method of the ContainerController object
containing the specified text flow position.
Parameters
absolutePosition:int — Specifies the position in the text flow of the container to receive focus.
| |
leanLeft:Boolean (default = false) |
Related API Elements
setRootElement | () | method |
public function setRootElement(newRootElement:ContainerFormattedElement):void| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
Parameters
newRootElement:ContainerFormattedElement |
updateAllControllers | () | method |
public function updateAllControllers():Boolean| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
Composes the content of the root element and updates the display.
Text layout is conducted in two phases: composition and display. In the composition phase,
the flow composer calculates how many lines are necessary to display the content as well as the position of these
lines in the flow's display containers. In the display phase,
the flow composer updates the display object children of its containers. The updateAllControllers()
method initiates both phases in sequence. The StandardFlowComposer keeps track of changes to content
so that a full cycle of composition and display is only performed when necessary.
This method updates all the text lines and the display list immediately and synchronously.
If the contents of any container is changed, the method returns true.
Boolean — true if anything changed.
|
updateToController | () | method |
public function updateToController(index:int):Boolean| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
Composes and updates the display up to and including the container at the specified index.
The updateToController() method composes the content and
updates the display of all containers up to and including the container at the specified index.
For example, if you have a chain of 20 containers and specify an index of 10,
updateToController() ensures that the first through the tenth (indexes 0-9)
containers are composed and displayed. Composition stops at that point. If controllerIndex
is -1 (or not specified), then all containers are updated.
This method updates all the text lines and the display list immediately and synchronously.
If the contents of any container is changed, the method returns true.
Parameters
index:int (default = NaN) |
Boolean — true, if anything changed.
|
importToFlow() method.
package flashx.textLayout.compose.examples {
import flash.display.Sprite;
import flashx.textLayout.compose.StandardFlowComposer;
import flashx.textLayout.container.ContainerController;
import flashx.textLayout.conversion.TextConverter;
import flashx.textLayout.elements.TextFlow;
public class StandardFlowComposer_ClassExample extends Sprite
{
private var poem:String = "Sonnet 18\n" +
"Shall I compare thee to a summer's day?\n" +
"Thou art more lovely and more temperate:\n" +
"Rough winds do shake the darling buds of May,\n" +
"And summer's lease hath all too short a date:\n" +
"Sometime too hot the eye of heaven shines,\n" +
"And often is his gold complexion dimmed,\n" +
"And every fair from fair sometime declines,\n" +
"By chance, or nature's changing course untrimmed:\n" +
"But thy eternal summer shall not fade,\n" +
"Nor lose possession of that fair thou ow'st,\n" +
"Nor shall death brag thou wand'rest in his shade,\n" +
"When in eternal lines to time thou grow'st,\n" +
"So long as men can breathe or eyes can see,\n" +
"So long lives this, and this gives life to thee.\n" +
"William Shakespeare\n";
private var flow:TextFlow;
public function StandardFlowComposer_ClassExample()
{
var firstContainer:Sprite = new Sprite();
firstContainer.x = 180;
firstContainer.y = 30;
this.stage.addChild( firstContainer );
var secondContainer:Sprite = new Sprite();
secondContainer.x = 30;
secondContainer.y = 130
this.stage.addChild( secondContainer );
var firstController:ContainerController = new ContainerController( firstContainer, 300, 100 );
var secondController:ContainerController = new ContainerController( secondContainer, 800, 600 );
flow = TextConverter.importToFlow( poem, TextConverter.PLAIN_TEXT_FORMAT );
flow.flowComposer = new StandardFlowComposer();;
flow.flowComposer.addController( firstController );
flow.flowComposer.addController( secondController );
flow.flowComposer.updateAllControllers();
}
}
}
Mon Apr 10 2017, 12:28 PM -07:00