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Merge pull request #3109 from fperucic/snap-feature

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Snap feature
This commit is contained in:
Andreas Hocevar
2015-03-27 14:45:57 +01:00
parent 98c510a729 d740640321
commit 254039a6ab
4 changed files with 866 additions and 1 deletions
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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="chrome=1">
<meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
<link rel="stylesheet" href="../css/ol.css" type="text/css">
<link rel="stylesheet" href="../resources/bootstrap/css/bootstrap.min.css" type="text/css">
<link rel="stylesheet" href="../resources/layout.css" type="text/css">
<link rel="stylesheet" href="../resources/bootstrap/css/bootstrap-responsive.min.css" type="text/css">
<title> Snap example </title>
</head>
<body>
<div class="navbar navbar-inverse navbar-fixed-top">
<div class="navbar-inner">
<div class="container">
<a class="brand" href="./"><img src="../resources/logo.png"> OpenLayers 3 Examples</a>
</div>
</div>
</div>
<div class="container-fluid">
<div class="row-fluid">
<div class="span12">
<div id="map" class="map"></div>
</div>
</div>
<div class="row-fluid">
<div class="span12">
<h4 id="title">Snap interaction example</h4>
<p id="shortdesc">Example of using the snap interaction together with
draw and modify interactions. The snap interaction must be added
last, as it needs to be the first to handle the
<code>pointermove</code> event.</p>
<form id="options-form" automplete="off">
<div class="radio">
<label>
<input type="radio" name="interaction" value="draw" id="draw" checked>
Draw &nbsp;
</label>
</div>
<div class="radio">
<label>
<input type="radio" name="interaction" value="modify">
Modify &nbsp;
</label>
</div>
<div class="form-group">
<label>Draw type &nbsp;</label>
<select name="draw-type" id="draw-type">
<option value="Point">Point</option>
<option value="LineString">LineString</option>
<option value="Polygon">Polygon</option>
</select>
</div>
</form>
<div id="docs">
<p>See the <a href="snap.js" target="_blank">snap.js source</a> to see how this is done.</p>
</div>
<div id="tags">draw, edit, modify, vector, featureoverlay, snap</div>
</div>
</div>
</div>
<script src="../resources/jquery.min.js" type="text/javascript"></script>
<script src="../resources/example-behaviour.js" type="text/javascript"></script>
<script src="loader.js?id=snap" type="text/javascript"></script>
</body>
</html>

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