基于OpenLayers的地图封装Javascript类定义
MapCwgisClass.js
//web地图封装类
//MapCwgisClass类的定义
//vp:hsg,myk
//create date:2013-07-26
//类 原型定义
var Person = function () {
this.m_Name = "good";
}
Person.prototype = {
m_Name: ‘‘,
getName: function () {
return this.m_Name;
}
}
//类 原型定义
var MapCwgisClass=function()
{
//OpenLayers环境参数
OpenLayers.IMAGE_RELOAD_ATTEMPTS = 5;
OpenLayers.DOTS_PER_INCH = 25.4 / 0.28;
OpenLayers.INCHES_PER_UNIT["千米"] = OpenLayers.INCHES_PER_UNIT["km"];
OpenLayers.INCHES_PER_UNIT["米"] = OpenLayers.INCHES_PER_UNIT["m"];
OpenLayers.INCHES_PER_UNIT["英里"] = OpenLayers.INCHES_PER_UNIT["mi"];
OpenLayers.INCHES_PER_UNIT["英寸"] = OpenLayers.INCHES_PER_UNIT["ft"];
this.defaultFormat = ‘image/png‘;
//
this.map=null;
}
MapCwgisClass.prototype={
//属性
wms_url:null,
wms_url_getFeature:null,
map_divid:null,
map: null,
currentClientPoint: null,
currentClientMapPoint:null,
m_CurrentTool:null,
ProxyHost:null,
defaultFormat:null,
defaultProjection:null,
defaultBounds:null,
vlayer_drawFeature:null,
layer_Highlight:null,
LayerList:null,
//自定义的wms图层属性
map_Raster:null,
map_Cadastra:null,
//
//图层名称
layer_DOM: "RFS_DOM", //DOM层名;
layer_XZQ: "RFS_XZQ", //行政区层名
layer_DX : "RFS_MZDW", //其他地类层名
layer_ZD : "RFS_CBD_ZD", //宗地层名
//新添加图层
layer_ZD_LS:"RFS_CBD_LS", //地块历鸣图层名称
//方法
//初始化地图方法
init:function()
{
//OpenLayers.ProxyHost = ‘GeoServerProxy.aspx?URL=‘;
OpenLayers.ProxyHost =this.ProxyHost;
//
//默认参数
this.defaultProjection = "EPSG:2358";
this.defaultBounds = new OpenLayers.Bounds(
34602000.15, 3318000.3500000006,
34609999.65, 3326999.8500000006);
var bounds = this.defaultBounds;
//选项
var options = {
controls: [], //若添加编辑框就在[]中加上 new OpenLayers.Control.EditingToolbar(vlayer)
maxExtent: bounds,
maxResolution: 35.154296875,
projection: this.defaultProjection,
units: ‘m‘,
allOverlays: false //true代表允许叠加显示图层
};
//初始化地图对象
this.map = new OpenLayers.Map(this.map_divid, options);
map=this.map; //给全局变量map赋值
mapWrap = this; //给全局变量赋值
var t_LLPoint=new OpenLayers.LonLat(0, 0);
//this.setCenterPoint(t_LLPoint, 3);
//放大到指定范围地图
//this.map.zoomToExtent(bounds);
//
},
setCenterPoint:function(openLayerLonLatPoint,Level)
{
if(this.map!=null)
{
this.map.setCenter(openLayerLonLatPoint,Level);
}
},
//创建wms图层
createLayerWms:function(p_mapName,p_wms_url,p_layers)
{
var t_mapLayer = new OpenLayers.Layer.WMS(
p_mapName, p_wms_url,
{
layers: p_layers,
styles: ‘‘,
tiled: true,
srs: defaultProjection,
format: defaultFormat
},
{
singleTile: true, ratio: 1
}
);
return t_mapLayer;
},
//创建Vector图层
createLayerVector:function(p_LayerName)
{
var t_layer_vector = new OpenLayers.Layer.Vector(p_LayerName);
return t_layer_vector;
},
//创建查询图层
createLayerQuery:function(p_QueryLayerName)
{
var t_querylayerName=‘查询图层‘;
if(p_QueryLayerName!=null && p_QueryLayerName!="")
{
t_querylayerName=p_QueryLayerName;
}
var t_styleMap=new OpenLayers.StyleMap({
"default": {
strokeColor: "#FF0000",
strokeOpacity: 1,
fillColor: "#6699ff",
fillOpacity: 0.2
}
});
var t_layer_Query = new OpenLayers.Layer.Vector(t_querylayerName, t_styleMap);
return t_layer_Query;
},
//添加图层
addLayer:function(pLayer)
{
if(this.map!=null)
{
this.map.addLayers([pLayer]);
}
},
//添加图层集
addLayers:function(pLayers)
{
if(this.map!=null)
{
this.map.addLayers([pLayers]);
}
},
//添加地图系统常用工具控件
//添加系统命令 控件 OK
addSystemCommands:function()
{
// this.map.addControl(new OpenLayers.Control.LayerSwitcher());
//添加比例尺线
var t_scaleline=new OpenLayers.Control.ScaleLine({ topOutUnits: "千米",
topInUnits: "米", bottomOutUnits: "英里", bottomInUnits: "英寸"
});t_scaleline.setMap(this.map);
this.map.addControl(t_scaleline);
//添加比例尺
var t_scale=new OpenLayers.Control.Scale();t_scale.setMap(this.map);
this.map.addControl(t_scale);
//添加鼠标点
var t_mouseposition=new OpenLayers.Control.MousePosition();
t_mouseposition.setMap(this.map);
this.map.addControl(t_mouseposition);
//添加鹰眼图
var t_ovmap=new OpenLayers.Control.LTOverviewMap();
t_ovmap.setMap(this.map);
this.map.addControl(t_ovmap);
//添加Zomm动画
var t_zommAnimation=new OpenLayers.Control.LTZommAnimation();
t_zommAnimation.setMap(this.map);
this.map.addControl(t_zommAnimation);
//添加平移缩放条
var t_panZoomBar=new OpenLayers.Control.PanZoomBar({
position: new OpenLayers.Pixel(2, 15)
});
t_panZoomBar.setMap(this.map);
this.map.addControl(t_panZoomBar);
//添加导航
var t_navigation=new OpenLayers.Control.Navigation();
t_navigation.setMap(this.map);
this.map.addControl(t_navigation);
},
addSystemCommands_normal:function()
{
//添加鼠标点
var t_mouseposition=new OpenLayers.Control.MousePosition();
t_mouseposition.setMap(this.map);
this.map.addControl(t_mouseposition);
//添加Zomm动画
var t_zommAnimation=new OpenLayers.Control.LTZommAnimation();
t_zommAnimation.setMap(this.map);
this.map.addControl(t_zommAnimation);
},
//添加测量命令 控件
addMeasureCommands:function()
{
//测量控制操作
var sketchSymbolizers = {
"Point": {
graphicName: "cross",
graphicHeight: 8,
graphicWidth: 8,
fillColor: "#FF0000",
fillOpacity: 1,
strokeWidth: 0,
},
"Line": {
strokeWidth: 1.5,
strokeOpacity: 1,
strokeColor: "#0000FF"
},
"Polygon": {
strokeWidth: 1.5,
strokeOpacity: 1,
strokeColor: "#0000FF",
fillColor: "#ccccff",
fillOpacity: 0.3
}
};
var style = new OpenLayers.Style();
style.addRules([new OpenLayers.Rule({ symbolizer: sketchSymbolizers })]);
var styleMap = new OpenLayers.StyleMap({ "default": style });
var renderer = OpenLayers.Util.getParameters(window.location.href).renderer;
renderer = (renderer) ? [renderer] : OpenLayers.Layer.Vector.prototype.renderers;
var options = {
persist: true,
handlerOptions: {
style: "default",
layerOptions: {
renderers: renderer,
styleMap: styleMap
}
}
};
//线，面测量
measureControls = {
line: new OpenLayers.Control.Measure(OpenLayers.Handler.Path, options),
polygon: new OpenLayers.Control.Measure(OpenLayers.Handler.Polygon, options)
};
var control;
for (var key in measureControls)
{
control = measureControls[key];
control.events.on({
"measure": handleMeasure, //测量距离完成的时候
"measurepartial": handleMeasurePartial //测量距离加入一个点的时候
});
this.map.addControl(control);
this.LayerList.add(control);
}
},
//添加绘制要素的命令 点，线，面
addDrawFeatureCommands:function()
{
this.vlayer_drawFeature = new OpenLayers.Layer.Vector();
this.map.addLayer(vlayer_drawFeature);
drawControls = {
point: new OpenLayers.Control.DrawFeature(
this.vlayer_drawFeature, OpenLayers.Handler.Point),
line: new OpenLayers.Control.DrawFeature(
this.vlayer_drawFeature, OpenLayers.Handler.Path),
polygon: new OpenLayers.Control.DrawFeature(
this.vlayer_drawFeature, OpenLayers.Handler.Polygon)
};
for (var key in drawControls)
{
this.map.addControl(drawControls[key]);
this.LayerList.add(drawControls[key]);
}
},
//添加面板
addPanel:function()
{
var panel = new OpenLayers.Control.Panel();
this.map.addControls(panel);
addPanelControls = {
zoomBox: new OpenLayers.Control.ZoomBox()
};
for (var key in addPanelControls)
{
this.map.addControl(addPanelControls[key]);
}
},
//缩放到要素
zoomToFeatures:function(features)
{
if(features==null||features==‘undefined‘) return;
var left=0;
var top=0;
var right=0;
var bottom=0;
//
for(i=0;i<features.length;i++)
{
var fea = features[i];
if(fea.geometry!=null)
{
var geoBound = fea.geometry.getBounds();
if(geoBound.left<left || left==0)
left = geoBound.left;
if(geoBound.top>top || top==0)
top = geoBound.top;
if(geoBound.right>right ||right==0)
right = geoBound.right;
if(geoBound.bottom<bottom||bottom==0)
bottom =geoBound.bottom;
}
}
var zoomBounds = new OpenLayers.Bounds(
left, bottom,
right, top);
this.map.zoomTo(7);
var t_LLpoint=this.getFeatureCenterLonLat(features[0]);
this.map.panTo(t_LLpoint);
},
//////////////////////////
//统一获取要素中心点函数//
//////////////////////////
getFeatureCenterLonLat:function (fea){
if(fea==null||fea==‘undefined‘)
{
return null;
}
var bound = fea.geometry.getBounds();
var lon = (parseFloat(bound.right) - parseFloat(bound.left)) / 2 + parseFloat(bound.left);
var lat = (parseFloat(bound.top ) - parseFloat(bound.bottom)) / 2 + parseFloat(bound.bottom);
var lonlat = new OpenLayers.LonLat(lon,lat);
return lonlat;
},/**/
//长度单位、面积单位汉化
UnitsToCHS:function (units)
{
var unitsCHS = units;
switch (units.toLowerCase())
{
case "m":
unitsCHS = "米";
break;
case "km":
unitsCHS = "千米";
break;
}
return unitsCHS;
},
//当前正在执行的工具
getCurrentTool:function()
{
return m_CurrentTool;
},
setCurrentTool:function(p_tool)
{
if(m_CurrentTool!=null)
{
try
{
m_CurrentTool.deactivate();
}
catch(e){}
}
m_CurrentTool=p_tool;
try
{
m_CurrentTool.activate();
}
catch(e){}
},
CLASS_NAME: "MapCwgisClass"
};
//设置全局变量和初始化地图控件
//============================================================
var t_p = new Person();
var t_t=t_p.getName();
//定义全局变量
var map=null;
var mapWrap=null;
//页面地图加载 //给全局变量赋值
mapWrap = new MapCwgisClass();
mapWrap.wms_url = wms_url;
mapWrap.wms_url_getFeature = wms_url_getFeature;
mapWrap.map_divid = ‘map‘;
mapWrap.ProxyHost = ‘GeoServerProxy.aspx?URL=‘;
mapWrap.init();
mapWrap.addSystemCommands(); //加载常用的系统功能
//============================================================