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-<html xmlns="http://www.w3.org/1999/xhtml">
- <head>
- <title>Vector Layer ZIndex Test</title>
- <style type="text/css">
- body {
- font-size: 0.8em;
- }
- p {
- padding-top: 1em;
- }
- #map {
- margin: 1em;
- width: 512px;
- height: 512px;
- }
- </style>
-
- <script src="../../lib/OpenLayers.js"></script>
- <script type="text/javascript">
- var map, layerA, layerB, layerV, selectControl1, selectControl2;
-
- function init() {
- map = new OpenLayers.Map('map');
- var wmsLayer = new OpenLayers.Layer.WMS(
- "OpenLayers WMS",
- "http://labs.metacarta.com/wms/vmap0",
- {layers: 'basic'}
- );
-
- layerV = new OpenLayers.Layer.Vector('v');
- var feature = new OpenLayers.Feature.Vector(
- new OpenLayers.Geometry.Polygon([
- new OpenLayers.Geometry.LinearRing([
- new OpenLayers.Geometry.Point(-110, 60),
- new OpenLayers.Geometry.Point(-110, 30),
- new OpenLayers.Geometry.Point(-80, 30),
- new OpenLayers.Geometry.Point(-110, 60)
- ])
- ])
- );
- layerV.addFeatures([feature]);
- selectControl1 = new OpenLayers.Control.SelectFeature(layerV);
- selectControl2 = new OpenLayers.Control.SelectFeature(layerV, {
- hover: true,
- selectStyle: OpenLayers.Util.applyDefaults({fillColor: "red"}, OpenLayers.Feature.Vector.style["select"]),
- onSelect: function(feature) {
- selectControl2.unselect(feature);
- layerV.drawFeature(feature, selectControl2.selectStyle);
- }
- });
- selectControl2.events.register("beforefeatureselected", null, function(feature) {
- layerV.drawFeature(feature, selectControl2.selectStyle);
- return false;
- })
-
- layerA = new OpenLayers.Layer('a', {'isBaseLayer': false});
- layerB = new OpenLayers.Layer.WMS(
- 'b', 'http://www2.dmsolutions.ca/cgi-bin/mswms_gmap', {
- 'layers': [
- 'bathymetry', 'land_fn', 'park', 'drain_fn', 'drainage',
- 'prov_bound', 'fedlimit', 'rail', 'road', 'popplace'
- ],
- 'transparent': 'true',
- 'format': 'image/png'
- }, {
- 'reproject': false
- });
-
- map.addLayers([wmsLayer, layerV, layerA, layerB]);
- map.addControl(selectControl2);
- map.addControl(selectControl1);
- map.addControl(new OpenLayers.Control.MousePosition());
- selectControl2.activate();
- selectControl1.activate();
-
- map.setCenter(new OpenLayers.LonLat(-90, 20), 2);
- }
-
- function removeLayerA() {
- if (OpenLayers.Util.indexOf(map.layers, layerA) > -1) {
- map.removeLayer(layerA);
- }
- }
-
- function toggleSelectControl1() {
- if (selectControl1.active) {
- selectControl1.deactivate();
- alert("SelectFeature control for clicks deactivated.");
- } else {
- selectControl1.activate();
- alert("SelectFeature control for clicks activated.");
- }
- }
-
- function toggleSelectControl2() {
- if (selectControl2.active) {
- selectControl2.deactivate();
- alert("SelectFeature control for hover deactivated.");
- } else {
- selectControl2.activate();
- alert("SelectFeature control for hover activated.");
- }
- }
- </script>
- </head>
- <body onload="init()">
- <h1 id="title">Vector Layer ZIndex Test</h1>
- <div id="map"></div>
- <p>
-
- The map includes one base layer (vmap0) and three overlays, namely a vector
- layer, a fake layer with no images, and a dmsolutions layer. The overlays are
- added to the map in this order: the vector layer, the fake layer, and the
- dmsolutions layer. The map also includes a select feature control, which
- when activated bumped the vector layer z-index to some high value. This
- makes feature selection work, even though other overlays were added after
- the vector layer.
-
- </p>
- <p>
-
- If the fake layer is removed from the map (first link below), the vector layer's
- z-index must not be reset, so the vector layer must not go under the
- dmsolutions layer and feature selection must continue to function as
- expected.
-
- </p>
- <p>
-
- If one of the SelectFeature controls is deactivated or activated (second
- and third link below), the vector layer should change it's position in the
- layer stack: on top if at least one of the controls is activated, covered
- by other layers if both are deactivated.
-
- </p>
-
- <p>
- <a href="javascript:removeLayerA()">Remove the fake layer</a>
- <br/><a href="javascript:toggleSelectControl1()">Toggle the click SelectFeature control's active status</a>
- <br/><a href="javascript:toggleSelectControl2()">Toggle the hover SelectFeature control's active status</a>
- </p>
- </body>
-</html>