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cesium自定义气泡窗口infoWindow后续优化篇

http://www.cnblogs.com/giserhome/p/6248858.html
该篇文章实现的自定义气泡窗口是基于修改cesium源代码基础上,这种做法只是援兵之计,凑合应付的,投机取巧罢了,实际上是不太适合的,cesium api更新版本替换,又得手动的去设置一下源代码;本篇则是从另一个角度真正的实现了自定义气泡窗口,气泡窗口的样式定义则是leaflet风格的,效果截图如下:

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具体实现思路:

1.气泡窗口css样式

/*leaflet风格气泡窗口样式模板*/.leaflet-popup {    position: absolute;    text-align: center;}.leaflet-popup-close-button {    position: absolute;    top: 0;    right: 0;    padding: 4px 4px 0 0;    text-align: center;    width: 18px;    height: 14px;    font: 16px/14px Tahoma, Verdana, sans-serif;    color: #c3c3c3;    text-decoration: none;    font-weight: bold;    background: transparent;}.leaflet-popup-content-wrapper {    text-align: center;    max-height: 200px;    overflow-y: auto;    background: white;    box-shadow: 0 3px 14px rgba(0,0,0,0.4);    padding: 1px;    text-align: left;    border-radius: 12px;}.leaflet-popup-content {    margin: 13px 19px;    line-height: 1.4;}.leaflet-popup-tip-container {    margin: 0 auto;    width: 40px;    height: 20px;    position: relative;    overflow: hidden;}.leaflet-popup-tip {    background: white;    box-shadow: 0 3px 14px rgba(0,0,0,0.4);    width: 17px;    height: 17px;    padding: 1px;    margin: -10px auto 0;    -webkit-transform: rotate(45deg);    -moz-transform: rotate(45deg);    -ms-transform: rotate(45deg);    -o-transform: rotate(45deg);    transform: rotate(45deg);}

2.气泡窗口div面板

//动态添加气泡窗口DIVvar infoDiv = ‘<div id="trackPopUp" style="display:none;">‘+                             ‘<div id="trackPopUpContent" class="leaflet-popup" style="top:5px;left:0;">‘+                               ‘<a class="leaflet-popup-close-button" href="http://www.mamicode.com/#">×</a>‘+                               ‘<div class="leaflet-popup-content-wrapper">‘+                                 ‘<div id="trackPopUpLink" class="leaflet-popup-content" style="max-width: 300px;"></div>‘+                               ‘</div>‘+                               ‘<div class="leaflet-popup-tip-container">‘+                                 ‘<div class="leaflet-popup-tip"></div>‘+                               ‘</div>‘+                             ‘</div>‘+ ‘</div>‘;$("#"+cesium.mapDivId).append(infoDiv);

气泡窗口div面板看实际情况的,也可以设置在页面html里面,我这里由于需要,是在js动态添加进来的。

3.核心的实现思路部分:如何动态刷新气泡窗口的位置

(1)cesium的点击事件Cesium.ScreenSpaceEventType.LEFT_CLICK监听鼠标的当前位置坐标,然后根据当前坐标去动态更新气泡窗口div的显示位置;

(2)监听cesium的postRender变化事件,这里特别关键,因为你拖拽球体移动,气泡窗口div也要对应移动的,气泡窗口的位置变化跟cesium球体是要动态刷新的;

附上部分关键代码:

cesium点击事件,获取当前位置

            handler3D.setInputAction(function(movement) {                                        //点击弹出气泡窗口                var pick = cesium.cesiumViewer.scene.pick(movement.position);                if(pick && pick.id){//选中某模型                       }                else{                    $(‘#trackPopUp‘).hide();                }            }, Cesium.ScreenSpaceEventType.LEFT_CLICK);                //加载3D模型

新气泡窗口的位置更新

function positionPopUp (c) {var x = c.x - ($(‘#trackPopUpContent‘).width()) / 2;var y = c.y - ($(‘#trackPopUpContent‘).height());$(‘#trackPopUpContent‘).css(‘transform‘, ‘translate3d(‘ + x + ‘px, ‘ + y + ‘px, 0)‘);}

postRender变化事件

var removeHandler = viewer.scene.postRender.addEventListener(function () {var changedC = Cesium.SceneTransforms.wgs84ToWindowCoordinates(viewer.scene, id._position._value);// If things moved, move the popUp tooif ((c.x !== changedC.x) || (c.y !== changedC.y)) {c = changedC;}});

cesium自定义气泡窗口infoWindow后续优化篇