Apache Flex 4.16.0 API Reference | All Packages | All Classes | Index | Frames No Frames |
TextFlowLine

Package | flashx.textLayout.compose
Class | public class TextFlowLine
Inheritance | TextFlowLine Object
Implements | IVerticalJustificationLine
Subclasses | TextFlowTableBlock

Language Version : | ActionScript 3.0

Runtime Versions : | Flash Player 10, AIR 1.5

The TextFlowLine class represents a single line of text in a text flow.

Use this class to access information about how a line of text has been composed: its position, height, width, and so on. When the text flow (TextFlow) is modified, the lines immediately before and at the site of the modification are marked as invalid because they need to be recomposed. Lines after the site of the modification might not be damaged immediately, but they might be regenerated once the text is composed. You can access a TextFlowLine that has been damaged, but any values you access reflect the old state of the TextFlow. When the TextFlow is recomposed, it generates new lines and you can get the new line for a given position by calling `TextFlow.flowComposer.findLineAtPosition()`.

Public Properties

| Property | Defined By
--- | --- | ---
|  | absoluteStart : int [read-only] The location of the line as an absolute character position in the TextFlow object. | TextFlowLine
|  | ascent : Number [read-only] | TextFlowLine
|  | columnIndex : int [read-only] The number of the column in which the line has been placed, with the first column being 0. | TextFlowLine
|  | controller : ContainerController [read-only] The controller (ContainerController object) for the container in which the line has been placed. | TextFlowLine
|  | descent : Number [read-only] | TextFlowLine
|  | height : Number [read-only] The height of the line in pixels. | TextFlowLine
|  | lineOffset : Number [read-only] The line's offset in pixels from the appropriate container inset (as dictated by paragraph direction and container block progression), prior to alignment of lines in the paragraph. | TextFlowLine
|  | location : int [read-only] One of the values from TextFlowLineLocation for specifying a line's location within a paragraph. | TextFlowLine
|  | paragraph : ParagraphElement [read-only] The paragraph (ParagraphElement) in which the line resides. | TextFlowLine
|  | spaceAfter : Number [read-only] The amount of space to leave after the line. | TextFlowLine
|  | spaceBefore : Number [read-only] The amount of space to leave before the line. | TextFlowLine
|  | textHeight : Number [read-only] The height of the text line, which is equal to ascent plus descent. | TextFlowLine
|  | textLength : int [read-only] The number of characters to the next line, including trailing spaces. | TextFlowLine
|  | textLineExists : Boolean [read-only] Indicates whether the flash.text.engine.TextLine object for this TextFlowLine exists. | TextFlowLine
|  | unjustifiedTextWidth : Number [read-only] The width of the line if it was not justified. | TextFlowLine
|  | validity : String [read-only] The validity of the line. | TextFlowLine
|  | x : Number The horizontal position of the line relative to its container, expressed as the offset in pixels from the left of the container. | TextFlowLine
|  | y : Number The vertical position of the line relative to its container, expressed as the offset in pixels from the top of the container. | TextFlowLine

Protected Properties

| Property | Defined By
--- | --- | ---
|  | _ascent : Number | TextFlowLine
|  | _descent : Number | TextFlowLine
|  | _lineOffset : Number | TextFlowLine

Public Methods

| Method | Defined By
--- | --- | ---
|  | TextFlowLine(textLine:TextLine, paragraph:ParagraphElement, outerTargetWidth:Number = 0, lineOffset:Number = 0, absoluteStart:int = 0, numChars:int = 0) Constructor - creates a new TextFlowLine instance. | TextFlowLine
|  | getBounds():Rectangle Returns the bounds of the line as a rectangle. | TextFlowLine
|  | getTextLine(forceValid:Boolean = false):TextLine Returns the flash.text.engine.TextLine object for this line, which might be recreated if it does not exist due to garbage collection. | TextFlowLine

Property Detail

_ascent | property

`protected var _ascent:Number`

_descent | property |

`protected var _descent:Number`

_lineOffset | property |

`protected var _lineOffset:Number`

absoluteStart | property |

`absoluteStart:int` [read-only]

Language Version : | ActionScript 3.0

Runtime Versions : | Flash Player 10, AIR 1.5

The location of the line as an absolute character position in the TextFlow object.

Implementation
`public function get absoluteStart():int`

See also

flashx.textLayout.elements.TextFlow

ascent | property |

`ascent:Number` [read-only]

Language Version : | ActionScript 3.0

Runtime Versions : | Flash Player 10, AIR 1.5

Implementation
`public function get ascent():Number`

columnIndex | property |

`columnIndex:int` [read-only]

Language Version : | ActionScript 3.0

Runtime Versions : | Flash Player 10, AIR 1.5

The number of the column in which the line has been placed, with the first column being 0.

Implementation
`public function get columnIndex():int`

controller | property |

`controller:ContainerController` [read-only]

Language Version : | ActionScript 3.0

Runtime Versions : | Flash Player 10, AIR 1.5

The controller (ContainerController object) for the container in which the line has been placed.

Implementation
`public function get controller():ContainerController`

See also

flashx.textLayout.container.ContainerController

descent | property |

`descent:Number` [read-only]

Language Version : | ActionScript 3.0

Runtime Versions : | Flash Player 10, AIR 1.5

Implementation
`public function get descent():Number`

height | property |

`height:Number` [read-only]

Language Version : | ActionScript 3.0

Runtime Versions : | Flash Player 10, AIR 1.5

The height of the line in pixels.

Implementation
`public function get height():Number`

lineOffset | property |

`lineOffset:Number` [read-only]

Language Version : | ActionScript 3.0

Runtime Versions : | Flash Player 10, AIR 1.5

The line's offset in pixels from the appropriate container inset (as dictated by paragraph direction and container block progression), prior to alignment of lines in the paragraph.

Implementation
`public function get lineOffset():Number`

location | property |

`location:int` [read-only]

Language Version : | ActionScript 3.0

Runtime Versions : | Flash Player 10, AIR 1.5

One of the values from TextFlowLineLocation for specifying a line's location within a paragraph.

Implementation
`public function get location():int`

See also

flashx.textLayout.elements.ParagraphElement
TextFlowLineLocation

paragraph | property |

`paragraph:ParagraphElement` [read-only]

Language Version : | ActionScript 3.0

Runtime Versions : | Flash Player 10, AIR 1.5

The paragraph (ParagraphElement) in which the line resides.

Implementation
`public function get paragraph():ParagraphElement`

See also

flashx.textLayout.elements.ParagraphElement

spaceAfter | property |

`spaceAfter:Number` [read-only]

Language Version : | ActionScript 3.0

Runtime Versions : | Flash Player 10, AIR 1.5

The amount of space to leave after the line.

If the line is the last line of a paragraph that has a space-after, the line will have a `spaceAfter` value. If the line comes at the bottom of a column, then the `spaceAfter` is ignored. Otherwise, the line comes before another line in the column, and the following line must be positioned vertically to insure that there is at least this much space left between this last line of the paragraph and the first line of the following paragraph.

Implementation
`public function get spaceAfter():Number`

See also

TextLayoutFormat.paragraphSpaceAfter

spaceBefore | property |

`spaceBefore:Number` [read-only]

Language Version : | ActionScript 3.0

Runtime Versions : | Flash Player 10, AIR 1.5

The amount of space to leave before the line.

If the line is the first line of a paragraph that has a space-before applied, the line will have a `spaceBefore` value. If the line comes at the top of a column, `spaceBefore` is ignored. Otherwise, the line follows another line in the column, and it is positioned vertically to insure that there is at least this much space left between this line and the last line of the preceding paragraph.

Implementation
`public function get spaceBefore():Number`

See also

TextLayoutFormat.paragraphSpaceBefore

textHeight | property |

`textHeight:Number` [read-only]

Language Version : | ActionScript 3.0

Runtime Versions : | Flash Player 10, AIR 1.5

The height of the text line, which is equal to `ascent` plus `descent`. The value is calculated based on the difference between the baselines that bound the line, either ideographic top and bottom or ascent and descent depending on whether the baseline at y=0 is ideographic (for example, TextBaseline.IDEOGRAPHIC_TOP) or not.

Implementation
`public function get textHeight():Number`

See also

TextBaseline

textLength | property |

`textLength:int` [read-only]

Language Version : | ActionScript 3.0

Runtime Versions : | Flash Player 10, AIR 1.5

The number of characters to the next line, including trailing spaces.

Implementation
`public function get textLength():int`

textLineExists | property |

`textLineExists:Boolean` [read-only]

Language Version : | ActionScript 3.0

Runtime Versions : | Flash Player 10, AIR 1.5

Indicates whether the `flash.text.engine.TextLine` object for this TextFlowLine exists. The value is `true` if the TextLine object has not been garbage collected and `false` if it has been.

Implementation
`public function get textLineExists():Boolean`

See also

TextLine

unjustifiedTextWidth | property |

`unjustifiedTextWidth:Number` [read-only]

Language Version : | ActionScript 3.0

Runtime Versions : | Flash Player 10, AIR 1.5

The width of the line if it was not justified. For unjustified text, this value is the same as `textLength`. For justified text, this value is what the length would have been without justification, and `textLength` represents the actual line width. For example, when the following String is justified and assigned a width of 500, it has an actual width of 500 but an unjustified width of 268.9921875.

Implementation
`public function get unjustifiedTextWidth():Number`

validity | property |

`validity:String` [read-only]

Language Version : | ActionScript 3.0

Runtime Versions : | Flash Player 10, AIR 1.5

The validity of the line.

A line can be invalid if the text, the attributes applied to it, or the controller settings have changed since the line was created. An invalid line can still be displayed, and you can use it, but the values used will be the values at the time it was created. The line returned by `getTextLine()` also will be in an invalid state.

Implementation
`public function get validity():String`

See also

getTextLine()
TextLine.validity
FlowDamageType.GEOMETRY

x | property |

`x:Number`

Language Version : | ActionScript 3.0

Runtime Versions : | Flash Player 10, AIR 1.5

The horizontal position of the line relative to its container, expressed as the offset in pixels from the left of the container.

Note: Although this property is technically `read-write`, you should treat it as `read-only`. The setter exists only to satisfy the requirements of the IVerticalJustificationLine interface that defines both a getter and setter for this property. Use of the setter, though possible, will lead to unpredictable results.

Implementation
`public function get x():Number`
`public function set x(value:Number):void`

See also

y

y | property |

`y:Number`

Language Version : | ActionScript 3.0

Runtime Versions : | Flash Player 10, AIR 1.5

The vertical position of the line relative to its container, expressed as the offset in pixels from the top of the container.

Note: Although this property is technically `read-write`, you should treat it as `read-only`. The setter exists only to satisfy the requirements of the IVerticalJustificationLine interface that defines both a getter and setter for this property. Use of the setter, though possible, will lead to unpredictable results.

Implementation
`public function get y():Number`
`public function set y(value:Number):void`

See also

x
Constructor Detail

TextFlowLine | () | Constructor

`public function TextFlowLine(textLine:TextLine, paragraph:ParagraphElement, outerTargetWidth:Number = 0, lineOffset:Number = 0, absoluteStart:int = 0, numChars:int = 0)`

Language Version : | ActionScript 3.0

Runtime Versions : | Flash Player 10, AIR 1.5

Constructor - creates a new TextFlowLine instance.

Note: No client should call this. It's exposed for writing your own composer.

Parameters

| `textLine:TextLine` — The TextLine display object to use for this line.
| `paragraph:ParagraphElement` — The paragraph (ParagraphElement) in which to place the line.
| `outerTargetWidth:Number` (default = `0`)`` — The width the line is composed to, excluding indents.
| `lineOffset:Number` (default = `0`)`` — The line's offset in pixels from the appropriate container inset (as dictated by paragraph direction and container block progression), prior to alignment of lines in the paragraph.
| `absoluteStart:int` (default = `0`)`` — The character position in the text flow at which the line begins.
| `numChars:int` (default = `0`)`` — The number of characters in the line.

See also

flash.text.engine.TextLine
flashx.textLayout.elements.ParagraphElement
absoluteStart
Method Detail

getBounds | () | method

`public function getBounds():Rectangle`

Language Version : | ActionScript 3.0

Runtime Versions : | Flash Player 10, AIR 1.5

Returns the bounds of the line as a rectangle.

Returns

| `Rectangle` — a rectangle that represents the boundaries of the line.

getTextLine | () | method |

`public function getTextLine(forceValid:Boolean = false):TextLine`

Language Version : | ActionScript 3.0

Runtime Versions : | Flash Player 10, AIR 1.5

Returns the `flash.text.engine.TextLine` object for this line, which might be recreated if it does not exist due to garbage collection. Set `forceValid` to `true` to cause the TextLine to be regenerated. Returns null if the TextLine cannot be recreated.

Parameters

| `forceValid:Boolean` (default = `false`)`` — if true, the TextLine is regenerated, if it exists but is invalid.

Returns

| `TextLine` — object for this line or `null` if the TextLine object cannot be recreated.

See also

TextLine

oldTestLineVisible | () | method |

`tlf_internal function oldTestLineVisible(wmode:String, x:int, y:int, w:int, h:int):Boolean`

Parameters

| `wmode:String`
| `x:int`
| `y:int`
| `w:int`
| `h:int`

Returns

| `Boolean`

Sun Mar 5 2017, 03:42 PM +11:00