map.js
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var gb_real_gps_map = (function () {
var wrap = '#real_gps_data_page';
var map;
var init = function (lineCode, upDown, stations) {
//初始化地图
var point = new BMap.Point(121.544336, 31.221315)
, zoom = 18;
map = new BMap.Map($('.map_cont:eq(0)', wrap)[0]);
map.centerAndZoom(point, zoom);
map.enableScrollWheelZoom(true);
if (stations)
drawLine(lineCode, upDown, stations);
}
var drawLine = function (lineCode, upDown, data) {
map.clearOverlays();
gps_marker_arr = [];
var arr = data.stations[upDown];
drawStations(arr);//绘制站点
drawSections(arr);//绘制站点间路段
//定位到起点
map.setCenter(
new BMap.Point(arr[0].bd_lon, arr[0].bd_lat));
};
function drawStations(arr) {
var s, point, marker, w, iw, icon, text;
for (var i = 0, len = arr.length; i < len; i++) {
s = arr[i];
s.index = i + 1;
transCoord(s);
point = new BMap.Point(s.bd_lon, s.bd_lat);
marker = new BMap.Marker(point);
//根据站点名称 计算marker 宽度
w = s.name.length * 12 + 38;
iw = w - 2;
s._name = s.name;
icon = new BMap.Icon(gb_map_utils.createStationIcon(s, w)
, new BMap.Size(iw, 24), {anchor: new BMap.Size(iw / 2, 25)})
marker.setIcon(icon);
marker._data = s;
map.addOverlay(marker);
}
}
function drawSections(arr) {
var s, coords, pos, polyline;
var color = arr[0].upDown == 0 ? 'blue' : 'red'
, style = {strokeWeight: 5, strokeColor: color, strokeOpacity: .7};
for (var i = 0, len = arr.length; i < len; i++) {
s = arr[i];
pos = [];
$.each(s.paths, function () {
coords = TransGPS.wgsToBD(this.lat, this.lon);
pos.push(new BMap.Point(coords.lng, coords.lat));
});
polyline = new BMap.Polyline(pos, style);
map.addOverlay(polyline);
}
}
function transCoord(obj) {
if (obj.bd_lat)
return;
var coord = TransGPS.wgsToBD(obj.lat, obj.lon);
obj.bd_lat = coord.lat;
obj.bd_lon = coord.lng;
}
var gps_marker_arr = {}, topMarker;
var renderGps = function (arr) {
var devices = [];
var gps, m, w;
for (var i = 0, len = arr.length; i < len; i++) {
gps = arr[i];
//转换坐标
transCoord(gps);
m = gps_marker_arr[gps.deviceId];
if (!m) {
m = createGpsMarker(gps);
map.addOverlay(m);
gps_marker_arr[gps.deviceId] = m;
}
else if (gps.timestamp != m._data.timestamp) {
m.setPosition(new BMap.Point(gps.bd_lon, gps.bd_lat));
w = m._icon_width;
m.setIcon(new BMap.Icon(createCarIconRotation(gps, w), new BMap.Size(w, 70)));
m._data = gps;
if (m.infoWindow.isOpen())
bdOpenWindow(m);
}
devices.push(gps.deviceId);
}
//删除多余的Marker (改变走向的)
for (var k in gps_marker_arr) {
if (devices.indexOf(k) == -1) {
map.removeOverlay(gps_marker_arr[k]);
gps_marker_arr[k] = null;
delete gps_marker_arr[k];
}
}
};
var createGpsMarker = function (gps) {
var point = new BMap.Point(gps.bd_lon, gps.bd_lat)
, m = new BMap.Marker(point);
//根据编码长度 计算marker 宽度
var w = gps.nbbm.length * 8.85;
m._icon_width = w;
//渲染icon
m.setIcon(new BMap.Icon(createCarIconRotation(gps, w), new BMap.Size(w, 70)));
m.setTop(true);
m._data = gps;
m.infoWindow = new BMap.InfoWindow();
//click
m.addEventListener('click', function () {
bdOpenWindow(this);
});
//mouseover
m.addEventListener('mouseover', function () {
setTop(this);
});
return m;
};
function setTop(m) {
if (topMarker)
topMarker.setTop(false);
m.setTop(true);
topMarker = m;
}
function bdOpenWindow(marker) {
var gps = marker._data;
marker.infoWindow.setContent(template('gps_map_info_win-temp', gps));
map.openInfoWindow(marker.infoWindow, marker.point);
}
function createCarIconRotation(gps, w) {
if (!w)
w = 70;
var canvas = $('<canvas></canvas>')[0];
canvas.width = w;
canvas.height = 64;
var ctx = canvas.getContext('2d');
var bg_color = gps.upDown == 0 ? 'rgba(94, 150, 210, 1)' : 'rgba(201, 33, 33, 1)';
ctx.roundRect(0, 0, w, 19, 4).stroke();
ctx.fillStyle = bg_color;
ctx.fill();
//文字
ctx.font = "14px arial";
ctx.fillStyle = "#fff";
ctx.fillText(gps.nbbm, 2, 14);
//角度图标
ctx.save();
ctx.translate(canvas.width / 2, canvas.height / 2);
ctx.rotate(gps.direction * Math.PI / 180);
/**
* 绘制角度图标
*/
ctx.beginPath();
ctx.strokeStyle = bg_color;
var circle = {
x: 0, //圆心的x轴坐标值
y: 0, //圆心的y轴坐标值
r: 12 //圆的半径
};
var d = 12.5;
//绘制圆形
ctx.arc(circle.x, circle.y, circle.r, 0, Math.PI * 2, true);
//按照指定的路径绘制弧线
ctx.stroke();
ctx.fillStyle = "#ffffff";
ctx.fill();
//下方矩形
ctx.beginPath();
ctx.fillStyle = bg_color;
ctx.fillRect(5 - d, 16 - d, 15, 4);
ctx.rect(5 - d, 11 - d, 7.5, 8);
ctx.rect(12.5 - d, 11 - d, 7.5, 8);
ctx.strokeStyle = bg_color;
ctx.stroke();
//上方三角形
ctx.beginPath();
ctx.fillStyle = "#111111";
ctx.moveTo(12.5 - d, 3 - d);
ctx.lineTo(6.5 - d, 7.5 - d);
ctx.lineTo(18.5 - d, 7.5 - d);
ctx.closePath();
ctx.fill();
ctx.restore();
return canvas.toDataURL();
}
//Canvas 带圆角的矩形
CanvasRenderingContext2D.prototype.roundRect = function (x, y, w, h, r) {
if (w < 2 * r) r = w / 2;
if (h < 2 * r) r = h / 2;
this.strokeStyle = 'rgba(0,102,0,.1)';
this.beginPath();
this.moveTo(x + r, y);
this.arcTo(x + w, y, x + w, y + h, r);
this.arcTo(x + w, y + h, x, y + h, r);
this.arcTo(x, y + h, x, y, r);
this.arcTo(x, y, x + w, y, r);
this.closePath();
return this;
};
/**
* 定位到gps
* @param device
*/
var focus = function (device) {
var m = gps_marker_arr[device];
if (m) {
map.setCenter(m.getPosition());
bdOpenWindow(m);
}
}
return {
init: init,
drawLine: drawLine,
renderGps: renderGps,
focus: focus
}
})();