95030cd838
This commit adds an `extend` method to the draw interaction. This method makes it possible to extend (continue drawing) an existing line string feature. It only works on line string features, where this functionality makes the most sense. Here's an example on how to use `extend`: ```js var vectorSource = vectorLayer.getSource(); vectroSource.removeFeature(feature); drawInteraction.extend(feature); ```
872 lines
26 KiB
JavaScript
872 lines
26 KiB
JavaScript
goog.provide('ol.interaction.Draw');
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goog.provide('ol.interaction.DrawEvent');
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goog.provide('ol.interaction.DrawEventType');
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goog.provide('ol.interaction.DrawGeometryFunctionType');
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goog.provide('ol.interaction.DrawMode');
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goog.require('goog.asserts');
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goog.require('goog.events');
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goog.require('goog.events.Event');
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goog.require('ol.Collection');
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goog.require('ol.Coordinate');
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goog.require('ol.Feature');
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goog.require('ol.MapBrowserEvent');
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goog.require('ol.MapBrowserEvent.EventType');
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goog.require('ol.Object');
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goog.require('ol.coordinate');
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goog.require('ol.events.condition');
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goog.require('ol.geom.Circle');
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goog.require('ol.geom.GeometryType');
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goog.require('ol.geom.LineString');
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goog.require('ol.geom.MultiLineString');
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goog.require('ol.geom.MultiPoint');
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goog.require('ol.geom.MultiPolygon');
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goog.require('ol.geom.Point');
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goog.require('ol.geom.Polygon');
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goog.require('ol.geom.SimpleGeometry');
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goog.require('ol.interaction.InteractionProperty');
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goog.require('ol.interaction.Pointer');
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goog.require('ol.layer.Vector');
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goog.require('ol.source.Vector');
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/**
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* @enum {string}
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*/
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ol.interaction.DrawEventType = {
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/**
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* Triggered upon feature draw start
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* @event ol.interaction.DrawEvent#drawstart
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* @api stable
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*/
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DRAWSTART: 'drawstart',
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/**
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* Triggered upon feature draw end
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* @event ol.interaction.DrawEvent#drawend
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* @api stable
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*/
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DRAWEND: 'drawend'
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};
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/**
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* @classdesc
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* Events emitted by {@link ol.interaction.Draw} instances are instances of
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* this type.
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*
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* @constructor
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* @extends {goog.events.Event}
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* @implements {oli.DrawEvent}
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* @param {ol.interaction.DrawEventType} type Type.
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* @param {ol.Feature} feature The feature drawn.
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*/
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ol.interaction.DrawEvent = function(type, feature) {
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goog.base(this, type);
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/**
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* The feature being drawn.
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* @type {ol.Feature}
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* @api stable
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*/
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this.feature = feature;
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};
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goog.inherits(ol.interaction.DrawEvent, goog.events.Event);
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/**
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* @classdesc
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* Interaction for drawing feature geometries.
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*
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* @constructor
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* @extends {ol.interaction.Pointer}
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* @fires ol.interaction.DrawEvent
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* @param {olx.interaction.DrawOptions} options Options.
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* @api stable
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*/
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ol.interaction.Draw = function(options) {
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goog.base(this, {
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handleDownEvent: ol.interaction.Draw.handleDownEvent_,
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handleEvent: ol.interaction.Draw.handleEvent,
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handleUpEvent: ol.interaction.Draw.handleUpEvent_
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});
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/**
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* @type {ol.Pixel}
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* @private
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*/
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this.downPx_ = null;
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/**
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* @type {boolean}
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* @private
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*/
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this.freehand_ = false;
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/**
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* Target source for drawn features.
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* @type {ol.source.Vector}
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* @private
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*/
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this.source_ = goog.isDef(options.source) ? options.source : null;
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/**
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* Target collection for drawn features.
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* @type {ol.Collection.<ol.Feature>}
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* @private
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*/
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this.features_ = goog.isDef(options.features) ? options.features : null;
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/**
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* Pixel distance for snapping.
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* @type {number}
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* @private
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*/
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this.snapTolerance_ = goog.isDef(options.snapTolerance) ?
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options.snapTolerance : 12;
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/**
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* Geometry type.
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* @type {ol.geom.GeometryType}
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* @private
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*/
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this.type_ = options.type;
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/**
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* Drawing mode (derived from geometry type.
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* @type {ol.interaction.DrawMode}
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* @private
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*/
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this.mode_ = ol.interaction.Draw.getMode_(this.type_);
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/**
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* The number of points that must be drawn before a polygon ring or line
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* string can be finished. The default is 3 for polygon rings and 2 for
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* line strings.
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* @type {number}
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* @private
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*/
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this.minPoints_ = goog.isDef(options.minPoints) ?
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options.minPoints :
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(this.mode_ === ol.interaction.DrawMode.POLYGON ? 3 : 2);
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/**
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* The number of points that can be drawn before a polygon ring or line string
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* is finished. The default is no restriction.
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* @type {number}
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* @private
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*/
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this.maxPoints_ = goog.isDef(options.maxPoints) ?
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options.maxPoints : Infinity;
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var geometryFunction = options.geometryFunction;
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if (!goog.isDef(geometryFunction)) {
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if (this.type_ === ol.geom.GeometryType.CIRCLE) {
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/**
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* @param {ol.Coordinate|Array.<ol.Coordinate>|Array.<Array.<ol.Coordinate>>} coordinates
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* @param {ol.geom.SimpleGeometry=} opt_geometry
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* @return {ol.geom.SimpleGeometry}
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*/
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geometryFunction = function(coordinates, opt_geometry) {
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var circle = goog.isDef(opt_geometry) ? opt_geometry :
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new ol.geom.Circle([NaN, NaN]);
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goog.asserts.assertInstanceof(circle, ol.geom.Circle,
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'geometry must be an ol.geom.Circle');
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var squaredLength = ol.coordinate.squaredDistance(
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coordinates[0], coordinates[1]);
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circle.setCenterAndRadius(coordinates[0], Math.sqrt(squaredLength));
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return circle;
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};
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} else {
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var Constructor;
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var mode = this.mode_;
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if (mode === ol.interaction.DrawMode.POINT) {
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Constructor = ol.geom.Point;
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} else if (mode === ol.interaction.DrawMode.LINE_STRING) {
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Constructor = ol.geom.LineString;
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} else if (mode === ol.interaction.DrawMode.POLYGON) {
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Constructor = ol.geom.Polygon;
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}
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/**
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* @param {ol.Coordinate|Array.<ol.Coordinate>|Array.<Array.<ol.Coordinate>>} coordinates
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* @param {ol.geom.SimpleGeometry=} opt_geometry
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* @return {ol.geom.SimpleGeometry}
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*/
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geometryFunction = function(coordinates, opt_geometry) {
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var geometry = opt_geometry;
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if (goog.isDef(geometry)) {
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geometry.setCoordinates(coordinates);
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} else {
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geometry = new Constructor(coordinates);
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}
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return geometry;
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};
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}
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}
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/**
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* @type {ol.interaction.DrawGeometryFunctionType}
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* @private
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*/
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this.geometryFunction_ = geometryFunction;
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/**
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* Finish coordinate for the feature (first point for polygons, last point for
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* linestrings).
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* @type {ol.Coordinate}
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* @private
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*/
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this.finishCoordinate_ = null;
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/**
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* Sketch feature.
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* @type {ol.Feature}
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* @private
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*/
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this.sketchFeature_ = null;
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/**
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* Sketch point.
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* @type {ol.Feature}
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* @private
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*/
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this.sketchPoint_ = null;
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/**
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* Sketch coordinates. Used when drawing a line or polygon.
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* @type {ol.Coordinate|Array.<ol.Coordinate>|Array.<Array.<ol.Coordinate>>}
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* @private
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*/
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this.sketchCoords_ = null;
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/**
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* Sketch line. Used when drawing polygon.
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* @type {ol.Feature}
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* @private
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*/
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this.sketchLine_ = null;
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/**
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* Sketch line coordinates. Used when drawing a polygon or circle.
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* @type {Array.<ol.Coordinate>}
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* @private
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*/
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this.sketchLineCoords_ = null;
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/**
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* Squared tolerance for handling up events. If the squared distance
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* between a down and up event is greater than this tolerance, up events
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* will not be handled.
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* @type {number}
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* @private
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*/
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this.squaredClickTolerance_ = goog.isDef(options.clickTolerance) ?
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options.clickTolerance * options.clickTolerance : 36;
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/**
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* Draw overlay where our sketch features are drawn.
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* @type {ol.layer.Vector}
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* @private
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*/
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this.overlay_ = new ol.layer.Vector({
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source: new ol.source.Vector({
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useSpatialIndex: false,
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wrapX: goog.isDef(options.wrapX) ? options.wrapX : false
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}),
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style: goog.isDef(options.style) ?
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options.style : ol.interaction.Draw.getDefaultStyleFunction()
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});
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/**
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* Name of the geometry attribute for newly created features.
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* @type {string|undefined}
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* @private
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*/
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this.geometryName_ = options.geometryName;
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/**
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* @private
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* @type {ol.events.ConditionType}
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*/
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this.condition_ = goog.isDef(options.condition) ?
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options.condition : ol.events.condition.noModifierKeys;
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/**
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* @private
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* @type {ol.events.ConditionType}
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*/
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this.freehandCondition_ = goog.isDef(options.freehandCondition) ?
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options.freehandCondition : ol.events.condition.shiftKeyOnly;
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goog.events.listen(this,
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ol.Object.getChangeEventType(ol.interaction.InteractionProperty.ACTIVE),
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this.updateState_, false, this);
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};
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goog.inherits(ol.interaction.Draw, ol.interaction.Pointer);
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/**
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* @return {ol.style.StyleFunction} Styles.
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*/
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ol.interaction.Draw.getDefaultStyleFunction = function() {
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var styles = ol.style.createDefaultEditingStyles();
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return function(feature, resolution) {
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return styles[feature.getGeometry().getType()];
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};
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};
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/**
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* @inheritDoc
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*/
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ol.interaction.Draw.prototype.setMap = function(map) {
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goog.base(this, 'setMap', map);
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this.updateState_();
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};
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/**
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* Handles the {@link ol.MapBrowserEvent map browser event} and may actually
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* draw or finish the drawing.
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* @param {ol.MapBrowserEvent} mapBrowserEvent Map browser event.
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* @return {boolean} `false` to stop event propagation.
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* @this {ol.interaction.Draw}
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* @api
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*/
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ol.interaction.Draw.handleEvent = function(mapBrowserEvent) {
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var pass = !this.freehand_;
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if (this.freehand_ &&
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mapBrowserEvent.type === ol.MapBrowserEvent.EventType.POINTERDRAG) {
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this.addToDrawing_(mapBrowserEvent);
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pass = false;
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} else if (mapBrowserEvent.type ===
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ol.MapBrowserEvent.EventType.POINTERMOVE) {
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pass = this.handlePointerMove_(mapBrowserEvent);
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} else if (mapBrowserEvent.type === ol.MapBrowserEvent.EventType.DBLCLICK) {
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pass = false;
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}
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return ol.interaction.Pointer.handleEvent.call(this, mapBrowserEvent) && pass;
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};
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/**
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* @param {ol.MapBrowserPointerEvent} event Event.
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* @return {boolean} Start drag sequence?
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* @this {ol.interaction.Draw}
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* @private
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*/
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ol.interaction.Draw.handleDownEvent_ = function(event) {
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if (this.condition_(event)) {
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this.downPx_ = event.pixel;
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return true;
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} else if ((this.mode_ === ol.interaction.DrawMode.LINE_STRING ||
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this.mode_ === ol.interaction.DrawMode.POLYGON) &&
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this.freehandCondition_(event)) {
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this.downPx_ = event.pixel;
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this.freehand_ = true;
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if (goog.isNull(this.finishCoordinate_)) {
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this.startDrawing_(event);
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}
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return true;
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} else {
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return false;
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}
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};
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/**
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* @param {ol.MapBrowserPointerEvent} event Event.
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* @return {boolean} Stop drag sequence?
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* @this {ol.interaction.Draw}
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* @private
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*/
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ol.interaction.Draw.handleUpEvent_ = function(event) {
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this.freehand_ = false;
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var downPx = this.downPx_;
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var clickPx = event.pixel;
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var dx = downPx[0] - clickPx[0];
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var dy = downPx[1] - clickPx[1];
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var squaredDistance = dx * dx + dy * dy;
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var pass = true;
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if (squaredDistance <= this.squaredClickTolerance_) {
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this.handlePointerMove_(event);
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if (goog.isNull(this.finishCoordinate_)) {
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this.startDrawing_(event);
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if (this.mode_ === ol.interaction.DrawMode.POINT) {
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this.finishDrawing();
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}
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} else if (this.mode_ === ol.interaction.DrawMode.CIRCLE) {
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this.finishDrawing();
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} else if (this.atFinish_(event)) {
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this.finishDrawing();
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} else {
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this.addToDrawing_(event);
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}
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pass = false;
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}
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return pass;
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};
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/**
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* Handle move events.
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* @param {ol.MapBrowserEvent} event A move event.
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* @return {boolean} Pass the event to other interactions.
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* @private
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*/
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ol.interaction.Draw.prototype.handlePointerMove_ = function(event) {
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if (!goog.isNull(this.finishCoordinate_)) {
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this.modifyDrawing_(event);
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} else {
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this.createOrUpdateSketchPoint_(event);
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}
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return true;
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};
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/**
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* Determine if an event is within the snapping tolerance of the start coord.
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* @param {ol.MapBrowserEvent} event Event.
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* @return {boolean} The event is within the snapping tolerance of the start.
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* @private
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*/
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ol.interaction.Draw.prototype.atFinish_ = function(event) {
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var at = false;
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if (!goog.isNull(this.sketchFeature_)) {
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var potentiallyDone = false;
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var potentiallyFinishCoordinates = [this.finishCoordinate_];
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if (this.mode_ === ol.interaction.DrawMode.LINE_STRING) {
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potentiallyDone = this.sketchCoords_.length > this.minPoints_;
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} else if (this.mode_ === ol.interaction.DrawMode.POLYGON) {
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potentiallyDone = this.sketchCoords_[0].length >
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this.minPoints_;
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potentiallyFinishCoordinates = [this.sketchCoords_[0][0],
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this.sketchCoords_[0][this.sketchCoords_[0].length - 2]];
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}
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if (potentiallyDone) {
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var map = event.map;
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for (var i = 0, ii = potentiallyFinishCoordinates.length; i < ii; i++) {
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var finishCoordinate = potentiallyFinishCoordinates[i];
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var finishPixel = map.getPixelFromCoordinate(finishCoordinate);
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var pixel = event.pixel;
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var dx = pixel[0] - finishPixel[0];
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var dy = pixel[1] - finishPixel[1];
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var freehand = this.freehand_ && this.freehandCondition_(event);
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var snapTolerance = freehand ? 1 : this.snapTolerance_;
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at = Math.sqrt(dx * dx + dy * dy) <= snapTolerance;
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if (at) {
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this.finishCoordinate_ = finishCoordinate;
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break;
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}
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}
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}
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}
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return at;
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};
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/**
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* @param {ol.MapBrowserEvent} event Event.
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* @private
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*/
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ol.interaction.Draw.prototype.createOrUpdateSketchPoint_ = function(event) {
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var coordinates = event.coordinate.slice();
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if (goog.isNull(this.sketchPoint_)) {
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this.sketchPoint_ = new ol.Feature(new ol.geom.Point(coordinates));
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this.updateSketchFeatures_();
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} else {
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var sketchPointGeom = this.sketchPoint_.getGeometry();
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goog.asserts.assertInstanceof(sketchPointGeom, ol.geom.Point,
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'sketchPointGeom should be an ol.geom.Point');
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sketchPointGeom.setCoordinates(coordinates);
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}
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};
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/**
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* Start the drawing.
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* @param {ol.MapBrowserEvent} event Event.
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* @private
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*/
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ol.interaction.Draw.prototype.startDrawing_ = function(event) {
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var start = event.coordinate;
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this.finishCoordinate_ = start;
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if (this.mode_ === ol.interaction.DrawMode.POINT) {
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this.sketchCoords_ = start.slice();
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} else if (this.mode_ === ol.interaction.DrawMode.POLYGON) {
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this.sketchCoords_ = [[start.slice(), start.slice()]];
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this.sketchLineCoords_ = this.sketchCoords_[0];
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} else {
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this.sketchCoords_ = [start.slice(), start.slice()];
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if (this.mode_ === ol.interaction.DrawMode.CIRCLE) {
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this.sketchLineCoords_ = this.sketchCoords_;
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}
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}
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if (!goog.isNull(this.sketchLineCoords_)) {
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this.sketchLine_ = new ol.Feature(
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new ol.geom.LineString(this.sketchLineCoords_));
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}
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var geometry = this.geometryFunction_(this.sketchCoords_);
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goog.asserts.assert(goog.isDef(geometry), 'geometry should be defined');
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this.sketchFeature_ = new ol.Feature();
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if (goog.isDef(this.geometryName_)) {
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this.sketchFeature_.setGeometryName(this.geometryName_);
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}
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this.sketchFeature_.setGeometry(geometry);
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this.updateSketchFeatures_();
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this.dispatchEvent(new ol.interaction.DrawEvent(
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ol.interaction.DrawEventType.DRAWSTART, this.sketchFeature_));
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};
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/**
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* Modify the drawing.
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* @param {ol.MapBrowserEvent} event Event.
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* @private
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*/
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ol.interaction.Draw.prototype.modifyDrawing_ = function(event) {
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var coordinate = event.coordinate;
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var geometry = this.sketchFeature_.getGeometry();
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goog.asserts.assertInstanceof(geometry, ol.geom.SimpleGeometry,
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'geometry should be ol.geom.SimpleGeometry or subclass');
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var coordinates, last;
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if (this.mode_ === ol.interaction.DrawMode.POINT) {
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last = this.sketchCoords_;
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} else if (this.mode_ === ol.interaction.DrawMode.POLYGON) {
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coordinates = this.sketchCoords_[0];
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last = coordinates[coordinates.length - 1];
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if (this.atFinish_(event)) {
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// snap to finish
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coordinate = this.finishCoordinate_.slice();
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}
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} else {
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coordinates = this.sketchCoords_;
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last = coordinates[coordinates.length - 1];
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}
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last[0] = coordinate[0];
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last[1] = coordinate[1];
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goog.asserts.assert(!goog.isNull(this.sketchCoords_),
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'sketchCoords_ must not be null');
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this.geometryFunction_(this.sketchCoords_, geometry);
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if (!goog.isNull(this.sketchPoint_)) {
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var sketchPointGeom = this.sketchPoint_.getGeometry();
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goog.asserts.assertInstanceof(sketchPointGeom, ol.geom.Point,
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'sketchPointGeom should be an ol.geom.Point');
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sketchPointGeom.setCoordinates(coordinate);
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}
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var sketchLineGeom;
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if (geometry instanceof ol.geom.Polygon &&
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this.mode_ !== ol.interaction.DrawMode.POLYGON) {
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if (goog.isNull(this.sketchLine_)) {
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this.sketchLine_ = new ol.Feature(new ol.geom.LineString(null));
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}
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var ring = geometry.getLinearRing(0);
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sketchLineGeom = this.sketchLine_.getGeometry();
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goog.asserts.assertInstanceof(sketchLineGeom, ol.geom.LineString,
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'sketchLineGeom must be an ol.geom.LineString');
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sketchLineGeom.setFlatCoordinates(
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ring.getLayout(), ring.getFlatCoordinates());
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} else if (!goog.isNull(this.sketchLineCoords_)) {
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sketchLineGeom = this.sketchLine_.getGeometry();
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goog.asserts.assertInstanceof(sketchLineGeom, ol.geom.LineString,
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'sketchLineGeom must be an ol.geom.LineString');
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sketchLineGeom.setCoordinates(this.sketchLineCoords_);
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}
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this.updateSketchFeatures_();
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};
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/**
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* Add a new coordinate to the drawing.
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* @param {ol.MapBrowserEvent} event Event.
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* @private
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*/
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ol.interaction.Draw.prototype.addToDrawing_ = function(event) {
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var coordinate = event.coordinate;
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var geometry = this.sketchFeature_.getGeometry();
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goog.asserts.assertInstanceof(geometry, ol.geom.SimpleGeometry,
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'geometry must be an ol.geom.SimpleGeometry');
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var done;
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var coordinates;
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if (this.mode_ === ol.interaction.DrawMode.LINE_STRING) {
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this.finishCoordinate_ = coordinate.slice();
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coordinates = this.sketchCoords_;
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coordinates.push(coordinate.slice());
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done = coordinates.length > this.maxPoints_;
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this.geometryFunction_(coordinates, geometry);
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} else if (this.mode_ === ol.interaction.DrawMode.POLYGON) {
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coordinates = this.sketchCoords_[0];
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coordinates.push(coordinate.slice());
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done = coordinates.length > this.maxPoints_;
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if (done) {
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this.finishCoordinate_ = coordinates[0];
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}
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this.geometryFunction_(this.sketchCoords_, geometry);
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}
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this.updateSketchFeatures_();
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if (done) {
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this.finishDrawing();
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}
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};
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/**
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* Remove last point of the feature currently being drawn.
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* @api
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*/
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ol.interaction.Draw.prototype.removeLastPoint = function() {
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var geometry = this.sketchFeature_.getGeometry();
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goog.asserts.assertInstanceof(geometry, ol.geom.SimpleGeometry,
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'geometry must be an ol.geom.SimpleGeometry');
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var coordinates, sketchLineGeom;
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if (this.mode_ === ol.interaction.DrawMode.LINE_STRING) {
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coordinates = this.sketchCoords_;
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coordinates.splice(-2, 1);
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this.geometryFunction_(coordinates, geometry);
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} else if (this.mode_ === ol.interaction.DrawMode.POLYGON) {
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coordinates = this.sketchCoords_[0];
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coordinates.splice(-2, 1);
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sketchLineGeom = this.sketchLine_.getGeometry();
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goog.asserts.assertInstanceof(sketchLineGeom, ol.geom.LineString,
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'sketchLineGeom must be an ol.geom.LineString');
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sketchLineGeom.setCoordinates(coordinates);
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this.geometryFunction_(this.sketchCoords_, geometry);
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}
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if (coordinates.length === 0) {
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this.finishCoordinate_ = null;
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}
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this.updateSketchFeatures_();
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};
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/**
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* Stop drawing and add the sketch feature to the target layer.
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* The {@link ol.interaction.DrawEventType.DRAWEND} event is dispatched before
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* inserting the feature.
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* @api
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*/
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ol.interaction.Draw.prototype.finishDrawing = function() {
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var sketchFeature = this.abortDrawing_();
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goog.asserts.assert(!goog.isNull(sketchFeature),
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'sketchFeature should not be null');
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var coordinates = this.sketchCoords_;
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var geometry = sketchFeature.getGeometry();
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goog.asserts.assertInstanceof(geometry, ol.geom.SimpleGeometry,
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'geometry must be an ol.geom.SimpleGeometry');
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if (this.mode_ === ol.interaction.DrawMode.LINE_STRING) {
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// remove the redundant last point
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coordinates.pop();
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this.geometryFunction_(coordinates, geometry);
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} else if (this.mode_ === ol.interaction.DrawMode.POLYGON) {
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// When we finish drawing a polygon on the last point,
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// the last coordinate is duplicated as for LineString
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// we force the replacement by the first point
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coordinates[0].pop();
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coordinates[0].push(coordinates[0][0]);
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this.geometryFunction_(coordinates, geometry);
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}
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// cast multi-part geometries
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if (this.type_ === ol.geom.GeometryType.MULTI_POINT) {
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sketchFeature.setGeometry(new ol.geom.MultiPoint([coordinates]));
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} else if (this.type_ === ol.geom.GeometryType.MULTI_LINE_STRING) {
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sketchFeature.setGeometry(new ol.geom.MultiLineString([coordinates]));
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} else if (this.type_ === ol.geom.GeometryType.MULTI_POLYGON) {
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sketchFeature.setGeometry(new ol.geom.MultiPolygon([coordinates]));
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}
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// First dispatch event to allow full set up of feature
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this.dispatchEvent(new ol.interaction.DrawEvent(
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ol.interaction.DrawEventType.DRAWEND, sketchFeature));
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// Then insert feature
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if (!goog.isNull(this.features_)) {
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this.features_.push(sketchFeature);
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}
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if (!goog.isNull(this.source_)) {
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this.source_.addFeature(sketchFeature);
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}
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};
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/**
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* Stop drawing without adding the sketch feature to the target layer.
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* @return {ol.Feature} The sketch feature (or null if none).
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* @private
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*/
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ol.interaction.Draw.prototype.abortDrawing_ = function() {
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this.finishCoordinate_ = null;
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var sketchFeature = this.sketchFeature_;
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if (!goog.isNull(sketchFeature)) {
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this.sketchFeature_ = null;
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this.sketchPoint_ = null;
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this.sketchLine_ = null;
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this.overlay_.getSource().clear(true);
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}
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return sketchFeature;
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};
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/**
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* Extend an existing geometry by adding additional points. This only works
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* on features with `LineString` geometries, where the interaction will
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* extend lines by adding points to the end of the coordinates array.
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* @param {!ol.Feature} feature Feature to be extended.
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* @api
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*/
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ol.interaction.Draw.prototype.extend = function(feature) {
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var geometry = feature.getGeometry();
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goog.asserts.assert(this.mode_ == ol.interaction.DrawMode.LINE_STRING,
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'interaction mode must be "line"');
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goog.asserts.assert(goog.isDefAndNotNull(geometry),
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'feature must have a geometry');
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goog.asserts.assert(geometry.getType() == ol.geom.GeometryType.LINE_STRING,
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'feature geometry must be a line string');
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var lineString = /** @type {ol.geom.LineString} */ (geometry);
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this.sketchFeature_ = feature;
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this.sketchCoords_ = lineString.getCoordinates();
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var last = this.sketchCoords_[this.sketchCoords_.length - 1];
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this.finishCoordinate_ = last.slice();
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this.sketchCoords_.push(last.slice());
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this.updateSketchFeatures_();
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this.dispatchEvent(new ol.interaction.DrawEvent(
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ol.interaction.DrawEventType.DRAWSTART, this.sketchFeature_));
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};
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/**
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* @inheritDoc
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*/
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ol.interaction.Draw.prototype.shouldStopEvent = goog.functions.FALSE;
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/**
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* Redraw the sketch features.
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* @private
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*/
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ol.interaction.Draw.prototype.updateSketchFeatures_ = function() {
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var sketchFeatures = [];
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if (!goog.isNull(this.sketchFeature_)) {
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sketchFeatures.push(this.sketchFeature_);
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}
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if (!goog.isNull(this.sketchLine_)) {
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sketchFeatures.push(this.sketchLine_);
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}
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if (!goog.isNull(this.sketchPoint_)) {
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sketchFeatures.push(this.sketchPoint_);
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}
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var overlaySource = this.overlay_.getSource();
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overlaySource.clear(true);
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overlaySource.addFeatures(sketchFeatures);
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};
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/**
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* @private
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*/
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ol.interaction.Draw.prototype.updateState_ = function() {
|
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var map = this.getMap();
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var active = this.getActive();
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if (goog.isNull(map) || !active) {
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this.abortDrawing_();
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}
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this.overlay_.setMap(active ? map : null);
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};
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/**
|
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* Create a `geometryFunction` for `mode: 'Circle'` that will create a regular
|
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* polygon with a user specified number of sides and start angle instead of an
|
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* `ol.geom.Circle` geometry.
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* @param {number=} opt_sides Number of sides of the regular polygon. Default is
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* 32.
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* @param {number=} opt_angle Angle of the first point in radians. 0 means East.
|
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* Default is the angle defined by the heading from the center of the
|
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* regular polygon to the current pointer position.
|
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* @return {ol.interaction.DrawGeometryFunctionType} Function that draws a
|
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* polygon.
|
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* @api
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*/
|
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ol.interaction.Draw.createRegularPolygon = function(opt_sides, opt_angle) {
|
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return (
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/**
|
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* @param {ol.Coordinate|Array.<ol.Coordinate>|Array.<Array.<ol.Coordinate>>} coordinates
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* @param {ol.geom.SimpleGeometry=} opt_geometry
|
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* @return {ol.geom.SimpleGeometry}
|
|
*/
|
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function(coordinates, opt_geometry) {
|
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var center = coordinates[0];
|
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var end = coordinates[1];
|
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var radius = Math.sqrt(
|
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ol.coordinate.squaredDistance(center, end));
|
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var geometry = goog.isDef(opt_geometry) ? opt_geometry :
|
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ol.geom.Polygon.fromCircle(new ol.geom.Circle(center), opt_sides);
|
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goog.asserts.assertInstanceof(geometry, ol.geom.Polygon,
|
|
'geometry must be a polygon');
|
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var angle = goog.isDef(opt_angle) ? opt_angle :
|
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Math.atan((end[1] - center[1]) / (end[0] - center[0]));
|
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ol.geom.Polygon.makeRegular(geometry, center, radius, angle);
|
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return geometry;
|
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}
|
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);
|
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};
|
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|
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|
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/**
|
|
* Get the drawing mode. The mode for mult-part geometries is the same as for
|
|
* their single-part cousins.
|
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* @param {ol.geom.GeometryType} type Geometry type.
|
|
* @return {ol.interaction.DrawMode} Drawing mode.
|
|
* @private
|
|
*/
|
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ol.interaction.Draw.getMode_ = function(type) {
|
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var mode;
|
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if (type === ol.geom.GeometryType.POINT ||
|
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type === ol.geom.GeometryType.MULTI_POINT) {
|
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mode = ol.interaction.DrawMode.POINT;
|
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} else if (type === ol.geom.GeometryType.LINE_STRING ||
|
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type === ol.geom.GeometryType.MULTI_LINE_STRING) {
|
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mode = ol.interaction.DrawMode.LINE_STRING;
|
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} else if (type === ol.geom.GeometryType.POLYGON ||
|
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type === ol.geom.GeometryType.MULTI_POLYGON) {
|
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mode = ol.interaction.DrawMode.POLYGON;
|
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} else if (type === ol.geom.GeometryType.CIRCLE) {
|
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mode = ol.interaction.DrawMode.CIRCLE;
|
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}
|
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goog.asserts.assert(goog.isDef(mode), 'mode should be defined');
|
|
return mode;
|
|
};
|
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|
|
|
|
/**
|
|
* Function that takes coordinates and an optional existing geometry 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.
|
|
* @typedef {function(!(ol.Coordinate|Array.<ol.Coordinate>|
|
|
* Array.<Array.<ol.Coordinate>>), ol.geom.SimpleGeometry=):
|
|
* ol.geom.SimpleGeometry}
|
|
* @api
|
|
*/
|
|
ol.interaction.DrawGeometryFunctionType;
|
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|
|
|
|
/**
|
|
* Draw mode. This collapses multi-part geometry types with their single-part
|
|
* cousins.
|
|
* @enum {string}
|
|
*/
|
|
ol.interaction.DrawMode = {
|
|
POINT: 'Point',
|
|
LINE_STRING: 'LineString',
|
|
POLYGON: 'Polygon',
|
|
CIRCLE: 'Circle'
|
|
};
|