# Class: LineControlHandle

## Annotations. LineControlHandle

A control handle for the Annotations.LineAnnotation.

#### new LineControlHandle(x, y, width, height, isEnd)

  Creates a line control handle.

  ##### Parameters:

  Name | Type | Description
  --- | --- | ---
  `x` | number | the x coordinate of the point
  `y` | number | the y coordinate of the point
  `width` | number | the width of the handle
  `height` | number | the height of the handle
  `isEnd` | boolean | true if the handle is for the start point, false if the handle is for the end point

### Extends

- Annotations.ControlHandle

### Members

#### handleHeight

  Defines the height of all control handles. Default is 8.

  Inherited From:
    - Annotations.ControlHandle#handleHeight

#### handleWidth

  Defines the width of all control handles. Default is 8.

  Inherited From:
    - Annotations.ControlHandle#handleWidth

#### selectionAccuracyPadding

  Defines a padding for selection accuracy. Default is 1. Increase this value to make selection more forgiving.

  Inherited From:
    - Annotations.ControlHandle#selectionAccuracyPadding

### Methods

#### draw(ctx, annotation, selectionBox, zoom)

  Draws the control handle's appearance on the provided canvas context

  ##### Parameters:

  Name | Type | Description
  --- | --- | ---
  `ctx` | CanvasRenderingContext2D | the annotation canvas context
  `annotation` | Annotations.Annotation | the annotation to modify
  `selectionBox` | Annotations.Rect | the selection rect
  `zoom` | double | the current zoom level of the document

  Inherited From:
    - Annotations.ControlHandle#draw

#### getDimensions(selectionBox)

  Gets the dimensions of the control handle

  ##### Parameters:

  Name | Type | Description
  --- | --- | ---
  `selectionBox` | Annotations.Rect | the selection rect

  Inherited From:
    - Annotations.ControlHandle#getDimensions

#### move(annotation, deltaX, deltaY, fromPoint, toPoint)

  The method invoked when a control handle is moved. Override the method to provide custom behavior to control handles.

  ##### Parameters:

  Name | Type | Description
  --- | --- | ---
  `annotation` | Annotations.Annotation | the annotation to modify
  `deltaX` | number | the change in x-coordinate
  `deltaY` | number | the change in y-coordinate
  `fromPoint` | Annotations.Point | the original page point (on mouse down)
  `toPoint` | Annotations.Point | the current page point

  Inherited From:
    - Annotations.ControlHandle#move

  ##### Returns:

  return true if a redraw operation is necessary

  Type
    boolean

#### testSelection(annotation, selectionBox, zoom, x, y)

  Determines if the provided point is a hit on the control handle. See Annotations.SelectionAlgorithm for usuable selection algorithms.

  ##### Parameters:

  Name | Type | Description
  --- | --- | ---
  `annotation` | Annotations.Annotation | the annotation
  `selectionBox` | Annotations.Rect | the selection rect
  `zoom` | number | the current zoom level of the document
  `x` | number | the x-coordinate of the point to test, in page coordinates
  `y` | number | the y-coordinate of the point to test, in page coordinates

  Inherited From:
    - Annotations.ControlHandle#testSelection

  ##### Returns:

  true if the provided point is a hit

  Type
    Boolean

#### Search results