150 lines
3.9 KiB
JavaScript
150 lines
3.9 KiB
JavaScript
goog.require('ol.FeatureOverlay');
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goog.require('ol.Map');
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goog.require('ol.View');
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goog.require('ol.interaction');
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goog.require('ol.interaction.Draw');
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goog.require('ol.interaction.Modify');
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goog.require('ol.interaction.Select');
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goog.require('ol.interaction.Snap');
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goog.require('ol.layer.Tile');
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goog.require('ol.source.MapQuest');
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goog.require('ol.style.Circle');
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goog.require('ol.style.Fill');
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goog.require('ol.style.Stroke');
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goog.require('ol.style.Style');
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var raster = new ol.layer.Tile({
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source: new ol.source.MapQuest({layer: 'sat'})
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});
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var map = new ol.Map({
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layers: [raster],
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target: 'map',
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view: new ol.View({
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center: [-11000000, 4600000],
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zoom: 4
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})
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});
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// The features are not added to a regular vector layer/source,
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// but to a feature overlay which holds a collection of features.
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// This collection is passed to the modify and also the draw
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// interaction, so that both can add or modify features.
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var featureOverlay = new ol.FeatureOverlay({
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style: new ol.style.Style({
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fill: new ol.style.Fill({
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color: 'rgba(255, 255, 255, 0.2)'
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}),
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stroke: new ol.style.Stroke({
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color: '#ffcc33',
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width: 2
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}),
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image: new ol.style.Circle({
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radius: 7,
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fill: new ol.style.Fill({
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color: '#ffcc33'
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})
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})
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}),
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map: map
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});
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var Modify = {
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init: function() {
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this.select = new ol.interaction.Select();
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map.addInteraction(this.select);
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this.modify = new ol.interaction.Modify({
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features: this.select.getFeatures()
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});
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map.addInteraction(this.modify);
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this.setEvents();
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},
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setEvents: function() {
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var selectedFeatures = this.select.getFeatures();
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this.select.on('change:active', function() {
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selectedFeatures.forEach(selectedFeatures.remove, selectedFeatures);
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});
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},
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setActive: function(active) {
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this.select.setActive(active);
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this.modify.setActive(active);
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}
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};
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Modify.init();
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var Draw = {
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init: function() {
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map.addInteraction(this.Point);
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this.Point.setActive(false);
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map.addInteraction(this.LineString);
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this.LineString.setActive(false);
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map.addInteraction(this.Polygon);
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this.Polygon.setActive(false);
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},
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Point: new ol.interaction.Draw({
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features: featureOverlay.getFeatures(),
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type: /** @type {ol.geom.GeometryType} */ ('Point')
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}),
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LineString: new ol.interaction.Draw({
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features: featureOverlay.getFeatures(),
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type: /** @type {ol.geom.GeometryType} */ ('LineString')
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}),
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Polygon: new ol.interaction.Draw({
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features: featureOverlay.getFeatures(),
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type: /** @type {ol.geom.GeometryType} */ ('Polygon')
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}),
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getActive: function() {
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return this.activeType ? this[this.activeType].getActive() : false;
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},
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setActive: function(active) {
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var type = optionsForm.elements['draw-type'].value;
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if (active) {
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this.activeType && this[this.activeType].setActive(false);
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this[type].setActive(true);
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this.activeType = type;
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} else {
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this.activeType && this[this.activeType].setActive(false);
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this.activeType = null;
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}
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}
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};
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Draw.init();
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var optionsForm = document.getElementById('options-form');
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/**
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* Let user change the geometry type.
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* @param {Event} e Change event.
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*/
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optionsForm.onchange = function(e) {
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var type = e.target.getAttribute('name');
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var value = e.target.value;
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if (type == 'draw-type') {
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Draw.getActive() && Draw.setActive(true);
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} else if (type == 'interaction') {
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if (value == 'modify') {
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Draw.setActive(false);
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Modify.setActive(true);
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} else if (value == 'draw') {
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Draw.setActive(true);
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Modify.setActive(false);
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}
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}
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};
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Draw.setActive(true);
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Modify.setActive(false);
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// The snap interaction must be added after the Modify and Draw interactions
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// in order for its map browser event handlers to be fired first. Its handlers
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// are responsible of doing the snapping.
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var snap = new ol.interaction.Snap({
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features: featureOverlay.getFeatures()
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});
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map.addInteraction(snap);
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