flash.text.engine.TextBaseline - Adobe® Flex® 4 Language Reference (Flex 4)

Package	flash.text.engine
Class	public final class TextBaseline
Inheritance	TextBaseline Object

Language Version:

ActionScript 3.0

Runtime Versions:

Flash Player 10, AIR 1.5

The TextBaseline class is an enumeration of constant values to use in setting the dominantBaseline and alignmentBaseline properties of the ElementFormat class. You can also use it in the baselineZero property of the TextBlock class. Consider this situation:

Text baseline alignment

The line consists of four TextElement objects, containing 'a', 'b', 'cccccccc', and 'X' respectively. The element containing 'X' determines the line baselines because it is the largest element in the line. The roman baseline of the 'X' element is aligned with the roman baseline of the line. The ideographic top of the 'a' element is aligned with the ideographic top of the line. The ideographic bottom of the 'b' element is aligned with the ideographic bottom of the line. The ideographic center of the 'cccccccc' element is aligned with the ideographic center of the line.

Public Properties

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	Property		Defined By
		constructor : Object A reference to the class object or constructor function for a given object instance.	Object
		prototype : Object [static] A reference to the prototype object of a class or function object.	Object

Public Methods

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	Method		Defined By
		hasOwnProperty(name:String):Boolean Indicates whether an object has a specified property defined.	Object
		isPrototypeOf(theClass:Object):Boolean Indicates whether an instance of the Object class is in the prototype chain of the object specified as the parameter.	Object
		propertyIsEnumerable(name:String):Boolean Indicates whether the specified property exists and is enumerable.	Object
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Sets the availability of a dynamic property for loop operations.	Object
		toLocaleString():String Returns the string representation of this object, formatted according to locale-specific conventions.	Object
		toString():String Returns the string representation of the specified object.	Object
		valueOf():Object Returns the primitive value of the specified object.	Object

Public Constants

	Constant		Defined By
		ASCENT : String = "ascent" [static] Specifies an ascent baseline.	TextBaseline
		DESCENT : String = "descent" [static] Specifies a descent baseline.	TextBaseline
		IDEOGRAPHIC_BOTTOM : String = "ideographicBottom" [static] Specifies an ideographic bottom baseline.	TextBaseline
		IDEOGRAPHIC_CENTER : String = "ideographicCenter" [static] Specifies an ideographic center baseline.	TextBaseline
		IDEOGRAPHIC_TOP : String = "ideographicTop" [static] Specifies an ideographic top baseline.	TextBaseline
		ROMAN : String = "roman" [static] Specifies a roman baseline.	TextBaseline
		USE_DOMINANT_BASELINE : String = "useDominantBaseline" [static] Specifies that the alignmentBaseline is the same as the dominantBaseline.	TextBaseline

Constant Detail

ASCENT

Constant

public static const ASCENT:String = "ascent"

Language Version:

ActionScript 3.0

Runtime Versions:

Flash Player 10, AIR 1.5

Specifies an ascent baseline. For a text element, the font and point size of the text determine this value. For a graphic element, the text engine uses the geometric top of the element.

DESCENT

Constant

public static const DESCENT:String = "descent"

Language Version:

ActionScript 3.0

Runtime Versions:

Flash Player 10, AIR 1.5

Specifies a descent baseline. For a text element, the font and point size of the text determine this value. For a graphic element, the text element uses the geometric bottom of the element.

IDEOGRAPHIC_BOTTOM

Constant

public static const IDEOGRAPHIC_BOTTOM:String = "ideographicBottom"

Language Version:

ActionScript 3.0

Runtime Versions:

Flash Player 10, AIR 1.5

Specifies an ideographic bottom baseline. For a text element, the font and point size of the text determine this value. For a graphic element, the text engine uses the geometric bottom of the element.

IDEOGRAPHIC_CENTER

Constant

public static const IDEOGRAPHIC_CENTER:String = "ideographicCenter"

Language Version:

ActionScript 3.0

Runtime Versions:

Flash Player 10, AIR 1.5

Specifies an ideographic center baseline. For a text element, the font and point size of the text determine this value. For a graphic element, the text engine uses the geometric center of the element.

IDEOGRAPHIC_TOP

Constant

public static const IDEOGRAPHIC_TOP:String = "ideographicTop"

Language Version:

ActionScript 3.0

Runtime Versions:

Flash Player 10, AIR 1.5

Specifies an ideographic top baseline. For a text element, the font and point size of the text determine this value. For a graphic element, the text engine uses the geometric top of the element.

ROMAN

Constant

public static const ROMAN:String = "roman"

Language Version:

ActionScript 3.0

Runtime Versions:

Flash Player 10, AIR 1.5

Specifies a roman baseline. For a text element, the font and point size of the text determine this value. For a graphic element, the text engine uses the geometric bottom of the element.

USE_DOMINANT_BASELINE

Constant

public static const USE_DOMINANT_BASELINE:String = "useDominantBaseline"

Language Version:

ActionScript 3.0

Runtime Versions:

Flash Player 10, AIR 1.5

Specifies that the alignmentBaseline is the same as the dominantBaseline. Use this value only to set ElementFormat.alignmentBaseline.

See also

ElementFormat.alignmentBaseline