Move vector code out of the way
This commit is contained in:
Tom Payne
@@ -1,405 +0,0 @@
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goog.provide('ol.interaction.Draw');
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goog.require('goog.asserts');
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goog.require('ol.Coordinate');
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goog.require('ol.Feature');
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goog.require('ol.Map');
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goog.require('ol.MapBrowserEvent');
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goog.require('ol.MapBrowserEvent.EventType');
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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.interaction.Interaction');
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goog.require('ol.layer.Vector');
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goog.require('ol.layer.VectorLayerRenderIntent');
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goog.require('ol.source.Vector');
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/**
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* Interaction that allows drawing geometries.
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* @param {ol.interaction.DrawOptions} options Options.
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* @constructor
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* @extends {ol.interaction.Interaction}
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*/
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ol.interaction.Draw = function(options) {
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goog.base(this);
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/**
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* Target layer for drawn features.
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* @type {ol.layer.Vector}
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* @private
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*/
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this.layer_ = options.layer;
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/**
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* Temporary sketch layer.
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* @type {ol.layer.Vector}
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* @private
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*/
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this.sketchLayer_ = 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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* 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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* Squared tolerance for handling click events. If the squared distance
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* between a down and click event is greater than this tolerance, click 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_ = 4;
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};
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goog.inherits(ol.interaction.Draw, ol.interaction.Interaction);
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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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var oldMap = this.getMap();
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if (!goog.isNull(oldMap)) {
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oldMap.removeLayer(this.sketchLayer_);
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}
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if (!goog.isNull(map)) {
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if (goog.isNull(this.sketchLayer_)) {
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var layer = new ol.layer.Vector({
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source: new ol.source.Vector({parser: null}),
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style: this.layer_.getStyle()
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});
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layer.setTemporary(true);
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this.sketchLayer_ = layer;
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}
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map.addLayer(this.sketchLayer_);
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} else {
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// removing from a map, clean up
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this.abortDrawing_();
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this.sketchLayer_ = null;
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}
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goog.base(this, 'setMap', map);
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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.handleMapBrowserEvent = function(event) {
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var map = event.map;
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if (!map.isDef()) {
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return true;
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}
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var pass = true;
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if (event.type === ol.MapBrowserEvent.EventType.CLICK) {
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pass = this.handleClick_(event);
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} else if (event.type === ol.MapBrowserEvent.EventType.MOUSEMOVE) {
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pass = this.handleMove_(event);
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} else if (event.type === ol.MapBrowserEvent.EventType.DBLCLICK) {
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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 click events.
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* @param {ol.MapBrowserEvent} event A click 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.handleClick_ = function(event) {
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var downPx = event.map.getEventPixel(event.target.getDown());
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var clickPx = event.getPixel();
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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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if (goog.isNull(this.finishCoordinate_)) {
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this.startDrawing_(event);
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} else if (this.mode_ === ol.interaction.DrawMode.POINT ||
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this.atFinish_(event)) {
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this.finishDrawing_(event);
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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 mousemove events.
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* @param {ol.MapBrowserEvent} event A mousemove 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.handleMove_ = function(event) {
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if (this.mode_ === ol.interaction.DrawMode.POINT &&
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goog.isNull(this.finishCoordinate_)) {
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this.startDrawing_(event);
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} else if (!goog.isNull(this.finishCoordinate_)) {
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this.modifyDrawing_(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 (this.sketchFeature_) {
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var geometry = this.sketchFeature_.getGeometry();
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var potentiallyDone = false;
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if (this.mode_ === ol.interaction.DrawMode.LINESTRING) {
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potentiallyDone = geometry.getCoordinates().length > 2;
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} else if (this.mode_ === ol.interaction.DrawMode.POLYGON) {
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potentiallyDone = geometry.getRings()[0].getCoordinates().length > 3;
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}
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if (potentiallyDone) {
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var map = event.map;
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var finishPixel = map.getPixelFromCoordinate(this.finishCoordinate_);
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var pixel = event.getPixel();
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var dx = pixel[0] - finishPixel[0];
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var dy = pixel[1] - finishPixel[1];
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at = Math.sqrt(dx * dx + dy * dy) <= this.snapTolerance_;
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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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* 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.getCoordinate();
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this.finishCoordinate_ = start;
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var sketchFeature = new ol.Feature();
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sketchFeature.setRenderIntent(ol.layer.VectorLayerRenderIntent.SELECTED);
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var features = [sketchFeature];
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var geometry;
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if (this.mode_ === ol.interaction.DrawMode.POINT) {
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geometry = new ol.geom.Point(start.slice());
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} else {
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var sketchPoint = new ol.Feature({
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geom: new ol.geom.Point(start.slice())
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});
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sketchPoint.setRenderIntent(ol.layer.VectorLayerRenderIntent.TEMPORARY);
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this.sketchPoint_ = sketchPoint;
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features.push(sketchPoint);
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if (this.mode_ === ol.interaction.DrawMode.LINESTRING) {
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geometry = new ol.geom.LineString([start.slice(), start.slice()]);
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} else if (this.mode_ === ol.interaction.DrawMode.POLYGON) {
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geometry = new ol.geom.Polygon([[start.slice(), start.slice()]]);
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}
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}
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goog.asserts.assert(goog.isDef(geometry));
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sketchFeature.setGeometry(geometry);
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this.sketchFeature_ = sketchFeature;
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this.sketchLayer_.addFeatures(features);
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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.getCoordinate();
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var geometry = this.sketchFeature_.getGeometry();
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var coordinates, last;
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if (this.mode_ === ol.interaction.DrawMode.POINT) {
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last = geometry.getCoordinates();
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last[0] = coordinate[0];
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last[1] = coordinate[1];
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geometry.setCoordinates(last);
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} else {
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if (this.mode_ === ol.interaction.DrawMode.LINESTRING) {
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coordinates = geometry.getCoordinates();
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} else if (this.mode_ === ol.interaction.DrawMode.POLYGON) {
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geometry = geometry.getRings()[0];
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coordinates = geometry.getCoordinates();
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}
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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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this.sketchPoint_.getGeometry().setCoordinates(coordinate);
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last = coordinates[coordinates.length - 1];
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last[0] = coordinate[0];
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last[1] = coordinate[1];
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geometry.setCoordinates(coordinates);
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}
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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.getCoordinate();
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var geometry = this.sketchFeature_.getGeometry();
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var coordinates, last;
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if (this.mode_ === ol.interaction.DrawMode.LINESTRING) {
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this.finishCoordinate_ = coordinate.slice();
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coordinates = geometry.getCoordinates();
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coordinates.push(coordinate.slice());
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geometry.setCoordinates(coordinates);
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} else if (this.mode_ === ol.interaction.DrawMode.POLYGON) {
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var ring = geometry.getRings()[0];
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coordinates = ring.getCoordinates();
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coordinates.push(coordinate.slice());
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ring.setCoordinates(coordinates);
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}
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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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* @param {ol.MapBrowserEvent} event Event.
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* @private
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*/
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ol.interaction.Draw.prototype.finishDrawing_ = function(event) {
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var sketchFeature = this.abortDrawing_();
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goog.asserts.assert(!goog.isNull(sketchFeature));
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sketchFeature.setRenderIntent(ol.layer.VectorLayerRenderIntent.DEFAULT);
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var geometry = sketchFeature.getGeometry();
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var coordinates = geometry.getCoordinates();
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if (this.mode_ === ol.interaction.DrawMode.LINESTRING) {
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// remove the redundant last point
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coordinates.pop();
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geometry.setCoordinates(coordinates);
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} else if (this.mode_ === ol.interaction.DrawMode.POLYGON) {
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// force clockwise order for exterior ring
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sketchFeature.setGeometry(new ol.geom.Polygon(coordinates));
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}
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// cast multi-part geometries
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if (this.type_ === ol.geom.GeometryType.MULTIPOINT) {
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sketchFeature.setGeometry(new ol.geom.MultiPoint([coordinates]));
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} else if (this.type_ === ol.geom.GeometryType.MULTILINESTRING) {
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sketchFeature.setGeometry(new ol.geom.MultiLineString([coordinates]));
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} else if (this.type_ === ol.geom.GeometryType.MULTIPOLYGON) {
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sketchFeature.setGeometry(new ol.geom.MultiPolygon([coordinates]));
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}
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this.layer_.addFeatures([sketchFeature]);
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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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var features = [sketchFeature];
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this.sketchFeature_ = null;
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if (this.mode_ !== ol.interaction.DrawMode.POINT) {
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features.push(this.sketchPoint_);
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this.sketchPoint_ = null;
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}
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this.sketchLayer_.removeFeatures(features);
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}
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return sketchFeature;
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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
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* their single-part cousins.
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* @param {ol.geom.GeometryType} type Geometry type.
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* @return {ol.interaction.DrawMode} Drawing mode.
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* @private
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*/
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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.MULTIPOINT) {
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mode = ol.interaction.DrawMode.POINT;
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} else if (type === ol.geom.GeometryType.LINESTRING ||
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type === ol.geom.GeometryType.MULTILINESTRING) {
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mode = ol.interaction.DrawMode.LINESTRING;
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} else if (type === ol.geom.GeometryType.POLYGON ||
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type === ol.geom.GeometryType.MULTIPOLYGON) {
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mode = ol.interaction.DrawMode.POLYGON;
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}
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goog.asserts.assert(goog.isDef(mode));
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return mode;
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};
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/**
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* Draw mode. This collapses multi-part geometry types with their single-part
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* cousins.
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* @enum {string}
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*/
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ol.interaction.DrawMode = {
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POINT: 'point',
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LINESTRING: 'linestring',
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POLYGON: 'polygon'
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};
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Reference in New Issue
Block a user