<!DOCTYPE html> <html> <head> <title>Layer Z-Index</title> <link rel="stylesheet" href="https://openlayers.org/en/v4.0.1/css/ol.css" type="text/css"> <!-- The line below is only needed for old environments like Internet Explorer and Android 4.x --> <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script> <script src="https://openlayers.org/en/v4.0.1/build/ol.js"></script> </head> <body> <div id="map" class="map"></div> <div> <label for="idx1"> <input type="number" id="idx1"></input> Square layer Z-index </label></br> <label for="idx2"> <input type="number" id="idx2"></input> Triangle layer Z-index </label> </div> <script> var stroke = new ol.style.Stroke({color: 'black', width: 1}); var styles = { 'square': new ol.style.Style({ image: new ol.style.RegularShape({ fill: new ol.style.Fill({color: 'blue'}), stroke: stroke, points: 4, radius: 80, angle: Math.PI / 4 }) }), 'triangle': new ol.style.Style({ image: new ol.style.RegularShape({ fill: new ol.style.Fill({color: 'red'}), stroke: stroke, points: 3, radius: 80, rotation: Math.PI / 4, angle: 0 }) }), 'star': new ol.style.Style({ image: new ol.style.RegularShape({ fill: new ol.style.Fill({color: 'green'}), stroke: stroke, points: 5, radius: 80, radius2: 4, angle: 0 }) }) }; function createLayer(coordinates, style, zIndex) { var feature = new ol.Feature(new ol.geom.Point(coordinates)); feature.setStyle(style); var source = new ol.source.Vector({ features: [feature] }); var vectorLayer = new ol.layer.Vector({ source: source }); vectorLayer.setZIndex(zIndex); return vectorLayer; } var layer0 = createLayer([40, 40], styles['star'], 0); var layer1 = createLayer([0, 0], styles['square'], 1); var layer2 = createLayer([0, 40], styles['triangle'], 0); var layers = []; layers.push(layer1); layers.push(layer2); var map = new ol.Map({ layers: layers, target: 'map', view: new ol.View({ center: [0, 0], zoom: 18 }) }); layer0.setMap(map); function bindInputs(id, layer) { var idxInput = document.getElementById('idx' + id); idxInput.onchange = function() { layer.setZIndex(parseInt(this.value, 10) || 0); }; idxInput.value = String(layer.getZIndex()); } bindInputs(1, layer1); bindInputs(2, layer2); </script> </body> </html>
OpenLayers示例代码:层Z索引
Copyright © Since 2014.
开源地理空间基金会中文分会
吉ICP备05002032号
Powered by TorCMS