Add a control that acts as a split agent. The control can be configured to listen for edits on any source layer or can create a temporary sketch layer for creating a split source. Source features will be used to split targets on a target layer. The deferDelete option tells the control to modify feature state instead of destroying split features (for use with a save strategy and a protocol that persists changes). r=ahocevar (closes #1972)
git-svn-id: http://svn.openlayers.org/trunk/openlayers@8998 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
Tim Schaub
267
examples/snap-split.html
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267
examples/snap-split.html
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>Snapping & Splitting</title>
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<link rel="stylesheet" href="../theme/default/style.css" type="text/css" />
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<link rel="stylesheet" href="style.css" type="text/css" />
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<style type="text/css">
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.olControlEditingToolbar .olControlModifyFeatureItemInactive {
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background-position: -1px 0px ;
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}
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.olControlEditingToolbar .olControlModifyFeatureItemActive {
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background-position: -1px -23px ;
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}
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label.head {
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font-weight: bold;
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padding: 1em 0 0.1em 0;
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border-bottom: 1px solid grey;
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}
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td {
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padding: 0.25em 1em;
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}
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tr.head td {
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text-align: center;
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font-weight: bold;
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}
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</style>
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<script src="../lib/Firebug/firebug.js"></script>
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<script src="../lib/OpenLayers.js"></script>
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<script type="text/javascript">
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OpenLayers.Feature.Vector.style['default']['strokeWidth'] = '2';
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function init() {
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initMap();
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initUI();
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}
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var map, draw, modify, snap, split, vectors;
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function initMap() {
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map = new OpenLayers.Map('map');
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var styles = new OpenLayers.StyleMap({
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"default": new OpenLayers.Style(null, {
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rules: [
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new OpenLayers.Rule({
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symbolizer: {
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"Point": {
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pointRadius: 5,
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graphicName: "square",
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fillColor: "white",
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fillOpacity: 0.25,
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strokeWidth: 1,
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strokeOpacity: 1,
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strokeColor: "#333333"
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},
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"Line": {
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strokeWidth: 3,
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strokeOpacity: 1,
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strokeColor: "#666666"
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}
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}
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})
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]
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}),
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"select": new OpenLayers.Style({
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strokeColor: "#00ccff",
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strokeWidth: 4
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}),
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"temporary": new OpenLayers.Style(null, {
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rules: [
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new OpenLayers.Rule({
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symbolizer: {
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"Point": {
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pointRadius: 5,
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graphicName: "square",
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fillColor: "white",
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fillOpacity: 0.25,
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strokeWidth: 1,
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strokeOpacity: 1,
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strokeColor: "#333333"
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},
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"Line": {
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strokeWidth: 3,
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strokeOpacity: 1,
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strokeColor: "#00ccff"
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}
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}
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})
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]
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})
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});
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// create three vector layers
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vectors = new OpenLayers.Layer.Vector("Lines", {
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isBaseLayer: true,
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strategies: [new OpenLayers.Strategy.Fixed()],
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protocol: new OpenLayers.Protocol.HTTP({
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url: "data/roads.json",
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format: new OpenLayers.Format.GeoJSON()
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}),
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styleMap: styles,
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maxExtent: new OpenLayers.Bounds(
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1549471.9221, 6403610.94, 1550001.32545, 6404015.8
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)
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});
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map.addLayer(vectors);
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// configure the snapping agent
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snap = new OpenLayers.Control.Snapping({layer: vectors});
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map.addControl(snap);
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snap.activate();
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// configure split agent
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split = new OpenLayers.Control.Split({
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layer: vectors,
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source: vectors,
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tolerance: 0.0001,
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eventListeners: {
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aftersplit: function(event) {
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flashFeatures(event.features);
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}
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}
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});
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map.addControl(split);
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split.activate();
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// add some editing tools to a panel
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var panel = new OpenLayers.Control.Panel({
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displayClass: "olControlEditingToolbar"
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});
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draw = new OpenLayers.Control.DrawFeature(
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vectors, OpenLayers.Handler.Path,
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{displayClass: "olControlDrawFeaturePoint"}
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);
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modify = new OpenLayers.Control.ModifyFeature(
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vectors, {displayClass: "olControlModifyFeature"}
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);
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panel.addControls([
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new OpenLayers.Control.Navigation(),
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draw, modify
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]);
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map.addControl(panel);
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map.addControl(new OpenLayers.Control.MousePosition());
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map.zoomToMaxExtent();
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}
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function flashFeatures(features, index) {
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if(!index) {
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index = 0;
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}
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var current = features[index];
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if(current && current.layer === vectors) {
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vectors.drawFeature(features[index], "select");
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}
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var prev = features[index-1];
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if(prev && prev.layer === vectors) {
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vectors.drawFeature(prev, "default");
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}
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++index;
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if(index <= features.length) {
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window.setTimeout(function() {flashFeatures(features, index)}, 75);
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}
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}
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/**
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* Add behavior to page elements. This basically lets us set snapping
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* target properties with the checkboxes and text inputs. The checkboxes
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* toggle the target node, vertex, or edge (boolean) values. The
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* text inputs set the nodeTolerance, vertexTolerance, or edgeTolerance
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* property values.
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*/
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function initUI() {
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// add behavior to snap elements
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var snapCheck = $("snap_toggle");
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snapCheck.checked = true;
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snapCheck.onclick = function() {
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if(snapCheck.checked) {
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snap.activate();
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$("snap_options").style.display = "block";
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} else {
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snap.deactivate();
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$("snap_options").style.display = "none";
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}
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};
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var target, type, tog, tol;
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var types = ["node", "vertex", "edge"];
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var target = snap.targets[0];
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for(var j=0; j<types.length; ++j) {
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type = types[j];
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tog = $("target_" + type);
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tog.checked = target[type];
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tog.onclick = (function(tog, type, target) {
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return function() {target[type] = tog.checked;}
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})(tog, type, target);
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tol = $("target_" + type + "Tolerance");
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tol.value = target[type + "Tolerance"];
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tol.onchange = (function(tol, type, target) {
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return function() {
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target[type + "Tolerance"] = Number(tol.value) || 0;
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}
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})(tol, type, target);
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}
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// add behavior to split elements
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var splitCheck = $("split_toggle");
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splitCheck.checked = true;
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splitCheck.onclick = function() {
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if(splitCheck.checked) {
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split.activate();
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$("split_options").style.display = "block";
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} else {
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split.deactivate();
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$("split_options").style.display = "none";
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}
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};
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var edgeCheck = $("edge_toggle");
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edgeCheck.checked = split.edge;
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edgeCheck.onclick = function() {
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split.edge = edgeCheck.checked;
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};
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$("clear").onclick = function() {
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modify.deactivate();
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vectors.destroyFeatures();
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};
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}
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</script>
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</head>
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<body onload="init()">
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<h1 id="title">Snapping & Splitting Example</h1>
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<div id="shortdesc">A demonstration snapping and splitting while editing vector features.</div>
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<div id="map" class="smallmap"></div>
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<br/>
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<input type="checkbox" id="snap_toggle" />
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<label for="snap_toggle" class="head">Enable Snapping</label>
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<table id="snap_options">
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<tbody>
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<tr class="head">
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<td>target</td><td>node</td><td>vertex</td><td>edge</td>
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</tr>
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<tr>
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<td>roads</td>
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<td><input type="checkbox" id="target_node" /><input id="target_nodeTolerance" type="text" size="3" /></td>
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<td><input type="checkbox" id="target_vertex" /><input id="target_vertexTolerance" type="text" size="3" /></td>
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<td><input type="checkbox" id="target_edge" /><input id="target_edgeTolerance" type="text" size="3" /></td>
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</tr>
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</tbody>
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</table>
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<br />
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<input type="checkbox" id="split_toggle" />
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<label for="split_toggle" class="head">Enable Splitting</label>
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<table id="split_options">
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<tbody>
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<tr>
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<td><label for="edge_toggle">edges split</label></td>
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<td><input type="checkbox" id="edge_toggle" /></td>
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</tr>
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</tbody>
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</table>
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<br />
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<button id="clear">clear</button> Clear all features.
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</body>
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</html>
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