SegmentDrawAction

Property Overview

Property Details

declaredClass Stringreadonly inherited

The name of the class. The declared class name is formatted as esri.folder.className.

hasZ Boolean inherited

Controls whether the created geometry will have z coordinates or not.

Default Value:true

mode String

The drawing mode. It is only relevant when the action is first created. Its value cannot be changed during the action lifecycle.

Possible Values

Value	Description
freehand	Vertices are added while the pointer is dragged.
click	Vertices are added when the pointer is clicked. SegmentDrawActions are created from 2 vertices.

Possible Values:"freehand"|"click"

Default Value:freehand

Example

draw.create("rectangle", {mode: "click"});

vertices Number[][]readonly inherited

Two-dimensional array of numbers representing the coordinates of each vertex comprising the geometry being drawn.

view MapView inherited

A reference to the MapView.

Method Overview

Method Details

addHandles(handleOrHandles, groupKey)inherited

Since: ArcGIS Maps SDK for JavaScript 4.25

Adds one or more handles which are to be tied to the lifecycle of the object. The handles will be removed when the object is destroyed.

// Manually manage handles
const handle = reactiveUtils.when(
  () => !view.updating,
  () => {
    wkidSelect.disabled = false;
  },
  { once: true }
);

this.addHandles(handle);

// Destroy the object
this.destroy();

Parameters

handleOrHandles WatchHandle|WatchHandle[] Handles marked for removal once the object is destroyed.

groupKey * optional Key identifying the group to which the handles should be added. All the handles in the group can later be removed with Accessor.removeHandles(). If no key is provided the handles are added to a default group.

canRedo(){Boolean}inherited

Indicates if the redo() method can be called on the action instance.

Returns

Type	Description
Boolean	Returns true if the redo() method can be called.

canUndo(){Boolean}inherited

Indicates if the undo() method can be called on the action instance.

Returns

Type	Description
Boolean	Returns true if the undo() method can be called.

complete()

Completes drawing the polygon geometry and fires the draw-complete event.

emit(type, event){Boolean}inherited

Emits an event on the instance. This method should only be used when creating subclasses of this class.

Parameters

type String The name of the event.

event Object optional The event payload.

Returns

Type	Description
Boolean	true if a listener was notified

getCoordsAndPointFromScreenPoint(screenPoint){FromScreenPointResult|null}inherited

Maps the given screen point to a map point.

Parameter

screenPoint ScreenPoint The location on the screen.

Returns

Type	Description
FromScreenPointResult | null	The result object containing, or null if the screen point could not be mapped.

getCoordsFromScreenPoint(screenPoint){Number[]|null}inherited

Maps the given screen point to a map point.

Parameter

screenPoint ScreenPoint The location on the screen.

Returns

Type	Description
Number[] | null	Array of x,y and z component (if hasZ is enabled) of the point associated with the given screen point or null if screen point could not be mapped.

hasEventListener(type){Boolean}inherited

Indicates whether there is an event listener on the instance that matches the provided event name.

Parameter

type String The name of the event.

Returns

Type	Description
Boolean	Returns true if the class supports the input event.

hasHandles(groupKey){Boolean}inherited

Since: ArcGIS Maps SDK for JavaScript 4.25

Returns true if a named group of handles exist.

Parameter

groupKey * optional A group key.

Returns

Type	Description
Boolean	Returns true if a named group of handles exist.

Example

// Remove a named group of handles if they exist.
if (obj.hasHandles("watch-view-updates")) {
  obj.removeHandles("watch-view-updates");
}

on(type, listener){Object}inherited

Registers an event handler on the instance. Call this method to hook an event with a listener.

Parameters

type String|String[] An event or an array of events to listen for.

listener Function The function to call when the event fires.

Returns

Type	Description
Object	Returns an event handler with a remove() method that should be called to stop listening for the event(s). Property Type Description remove Function When called, removes the listener from the event.

Example

view.on("click", function(event){
  // event is the event handle returned after the event fires.
  console.log(event.mapPoint);
});

redo()inherited

Incrementally redo actions recorded in the stack. Call canRedo() prior to calling this method to check if this method can be called on the action instance. Calling this method will fire the vertex-add or vertex-remove events depending on the last action.

Example

if (action.canRedo()) {
  action.redo();
}

removeHandles(groupKey)inherited

Since: ArcGIS Maps SDK for JavaScript 4.25

Removes a group of handles owned by the object.

Parameter

groupKey * optional A group key or an array or collection of group keys to remove.

Example

obj.removeHandles(); // removes handles from default group

obj.removeHandles("handle-group");
obj.removeHandles("other-handle-group");

screenToMap(screenPoint){Point|null}inherited

Maps the given screen point to a map point.

Parameter

screenPoint ScreenPoint The location on the screen.

Returns

Type	Description
Point | null	MapPoint associated with the given screen point or null if screen point could not be mapped.

undo()inherited

Incrementally undo actions recorded in the stack. Call canUndo() prior to calling this method to check if this method can be called on the action instance. Calling this method will fire the vertex-add or vertex-remove events depending on the last action.

Example

if (action.canUndo()) {
  action.undo();
}

Event Overview

Event Details

cursor-update

Fires after the pointer moves on the view.

Properties

vertices Number[][] A two-dimensional array of numbers representing the coordinates of each vertex that comprise the geometry.

vertexIndex Number Index of the last vertex added to the vertices array.

preventDefault Function Prevents event propagation bubbling up the event chain.

defaultPrevented Boolean Set to true when preventDefault() is called.

type String The type of the event. The value is always "cursor-update".

Example

// listen to SegmentDrawAction.cursor-update
// give a visual feedback to the user on the view
// as user moving the pointer.
action.on("cursor-update", function (evt) {
  view.graphics.removeAll();
  let polygon = new Polygon({
    rings: evt.vertices,
    spatialReference: view.spatialReference
  });
  graphic = createGraphic(polygon);
  view.graphics.add(graphic);
});

draw-complete

Fires after the user has completed drawing a geometry.

Properties

vertices Number[][] A two-dimensional array of numbers representing the coordinates of each vertex that comprise the geometry.

preventDefault Function Prevents event propagation bubbling up the event chain.

defaultPrevented Boolean Set to true when preventDefault() is called.

type String The type of the event. The value is always "draw-complete".

Example

// listen to SegmentDrawAction.draw-complete
// add the graphic representing the completed
// polygon to the view
action.on("draw-complete", function (evt) {
  view.graphics.removeAll();
  let polygon = new Polygon({
    rings: evt.vertices,
    spatialReference: view.spatialReference
  });
  graphic = createGraphic(polygon);
  view.graphics.add(graphic);
});

vertex-add

Fires when a vertex is added.

Properties

vertices Number[][] A two-dimensional array of numbers representing the coordinates of each vertex that make the geometry.

vertexIndex Number Index of the last vertex added to the vertices array.

preventDefault Function Prevents event propagation bubbling up the event chain.

defaultPrevented Boolean Set to true when preventDefault() is called.

type String The type of the event. The value is always "vertex-add".

Example

// listen to SegmentDrawAction.vertex-add
// give a visual feedback to the user on the view
// as user moving the pointer.
action.on("vertex-add", function (evt) {
  view.graphics.removeAll();
  let polygon = new Polygon({
    rings: evt.vertices,
    spatialReference: view.spatialReference
  });
  graphic = createGraphic(polygon);
  view.graphics.add(graphic);
});