Module: ol/interaction/Draw

Classes

DrawEvent

Draw

Methods

module:ol/interaction/Draw.createBox(){module:ol/interaction/Draw~GeometryFunction}

interaction/Draw.js, line 1216

import {createBox} from 'ol/interaction/Draw';

Create a geometryFunction that will create a box-shaped polygon (aligned with the coordinate system axes). Use this with the draw interaction and type: 'Circle' to return a box instead of a circle geometry.

Returns:

Function that draws a box-shaped polygon.

module:ol/interaction/Draw.createRegularPolygon(opt_sides, opt_angle){module:ol/interaction/Draw~GeometryFunction}

interaction/Draw.js, line 1178

import {createRegularPolygon} from 'ol/interaction/Draw';

Create a geometryFunction for type: 'Circle' that will create a regular polygon with a user specified number of sides and start angle instead of a module:ol/geom/Circle~Circle geometry.

Name	Type	Description
sides	number	Number of sides of the regular polygon. Default is 32.
angle	number	Angle of the first point in counter-clockwise radians. 0 means East. Default is the angle defined by the heading from the center of the regular polygon to the current pointer position.

Returns:

Function that draws a polygon.

Type Definitions

GeometryFunction()

interaction/Draw.js, line 107

Function that takes an array of coordinates and an optional existing geometry and a projection as arguments, and returns a geometry. The optional existing geometry is the geometry that is returned when the function is called without a second argument.

LineCoordType{Array.<module:ol/coordinate~Coordinate>}

Coordinate type when drawing lines.

Options{Object}

Properties:

Name	Type	Argument	Default	Description
type	module:ol/geom/GeometryType			Geometry type of the geometries being drawn with this instance.
clickTolerance	number	<optional>	6	The maximum distance in pixels between "down" and "up" for a "up" event to be considered a "click" event and actually add a point/vertex to the geometry being drawn. The default of 6 was chosen for the draw interaction to behave correctly on mouse as well as on touch devices.
features	module:ol/Collection~Collection.<module:ol/Feature~Feature>	<optional>		Destination collection for the drawn features.
source	module:ol/source/Vector~VectorSource	<optional>		Destination source for the drawn features.
dragVertexDelay	number	<optional>	500	Delay in milliseconds after pointerdown before the current vertex can be dragged to its exact position.
snapTolerance	number	<optional>	12	Pixel distance for snapping to the drawing finish. Must be greater than 0.
stopClick	boolean	<optional>	false	Stop click, singleclick, and doubleclick events from firing during drawing.
maxPoints	number	<optional>		The number of points that can be drawn before a polygon ring or line string is finished. By default there is no restriction.
minPoints	number	<optional>		The number of points that must be drawn before a polygon ring or line string can be finished. Default is 3 for polygon rings and 2 for line strings.
finishCondition	module:ol/events/condition~Condition	<optional>		A function that takes an module:ol/MapBrowserEvent~MapBrowserEvent and returns a boolean to indicate whether the drawing can be finished. Not used when drawing POINT or MULTI_POINT geometries.
style	module:ol/style/Style~StyleLike	<optional>		Style for sketch features.
geometryFunction	module:ol/interaction/Draw~GeometryFunction	<optional>		Function that is called when a geometry's coordinates are updated.
geometryName	string	<optional>		Geometry name to use for features created by the draw interaction.
condition	module:ol/events/condition~Condition	<optional>		A function that takes an module:ol/MapBrowserEvent~MapBrowserEvent and returns a boolean to indicate whether that event should be handled. By default module:ol/events/condition.noModifierKeys, i.e. a click, adds a vertex or deactivates freehand drawing.
freehand	boolean	<optional>	false	Operate in freehand mode for lines, polygons, and circles. This makes the interaction always operate in freehand mode and takes precedence over any freehandCondition option.
freehandCondition	module:ol/events/condition~Condition	<optional>		Condition that activates freehand drawing for lines and polygons. This function takes an module:ol/MapBrowserEvent~MapBrowserEvent and returns a boolean to indicate whether that event should be handled. The default is module:ol/events/condition.shiftKeyOnly, meaning that the Shift key activates freehand drawing.
wrapX	boolean	<optional>	false	Wrap the world horizontally on the sketch overlay.

PointCoordType{module:ol/coordinate~Coordinate}

Coordinate type when drawing points.

PolyCoordType{Array.<Array.<module:ol/coordinate~Coordinate>>}

Coordinate type when drawing polygons.

SketchCoordType{module:ol/interaction/Draw~PointCoordType} {module:ol/interaction/Draw~LineCoordType} {module:ol/interaction/Draw~PolyCoordType}

Types used for drawing coordinates.