亲宝软件园·资讯

展开

Qt 地图迁徙图

feiyangqingyun 人气:1

一、前言

在很多web系统中,尤其是大屏系统中,经常可以看到类似于飞机迁徙图的效果,这个在echart中也是最常用的一个效果,迁徙图既可以是一个飞机也可以是其他形状,然后有一条动态的移动轨迹来表示流向,一般都是多个点流向一个点,也可以做成一个点流向多个点,是个多对多的关系,常用来表示人口迁徙、动物迁徙、黑客攻击、病毒攻击、数据流向、产品流向等。

迁徙图和上一篇的闪烁点图类似,也需要提供三个基本要素:城市名称集合、城市经纬度集合、中心点城市经纬度,至于城市点的颜色和迁徙流向箭头的颜色,都可以单独设置,echart对每个类对象都竭尽全力的提供了各种各样的属性,只要你可以想象得到的都有,估计也是开发人员摸爬滚打从实际需求中不断完善和提炼出来的,比如颜色、位置、动作、动画、字体、大小、形状、效果、类型等,这点还是非常佩服相关的开发人员,能够不断的完善升级到今天,确实相当完美。

二、功能特点

三、体验地址

体验地址:http://pan.baidu.com/s/1Ie1xGLv7tSL-9vfsv28w1Q 提取码: wf4f   文件名:bin_map.zip
国内站点:https://gitee.com/feiyangqingyun
国际站点:https://github.com/feiyangqingyun

四、效果图

在这里插入图片描述

五、相关代码

//核心代码
QString Echarts::newChartMove(const QString &centerCity)
{
	int cityNameCount = cityName.count();
	int cityValueCount = cityValue.count();
	int cityPointCount = cityPoint.count();
	if (cityNameCount != cityValueCount || cityValueCount != cityPointCount) {
		return "";
	}

	QStringList body;

	//添加对应的值
	QStringList values;
	for (int i = 0; i < cityNameCount; i++) {
		values << QString("[{name: '%1', value: %2}]").arg(cityName.at(i)).arg(cityValue.at(i));
	}

	//添加对应的经纬度
	QStringList points;
	for (int i = 0; i < cityNameCount; i++) {
		points << QString("'%1':[%2]").arg(cityName.at(i)).arg(cityPoint.at(i));
	}

	body << QString("  var data = [%1]").arg(values.join(","));
	body << QString("  var geoCoordMap = {%1};").arg(points.join(","));

	//找到中心城市的经纬度,默认值北京
	QString toCity = "北京";
	QString toPoint = "116.46,39.92";
	int index = cityName.indexOf(centerCity);
	if (index >= 0) {
		toCity = centerCity;
		toPoint = cityPoint.at(index);
	}

	//转换数据
	QStringList datas;
	datas << QString("var convertData = function(data) {");
	datas << QString("  var res = [];");
	datas << QString("  for (var i = 0; i < data.length; i++) {");
	datas << QString("    var dataItem = data[i];");
	datas << QString("    var fromCoord = geoCoordMap[dataItem[0].name];");
	datas << QString("    var toCoord = [%1];").arg(toPoint);
	datas << QString("    if (fromCoord && toCoord) {");
	datas << QString("      res.push([{");
	datas << QString("        coord: fromCoord,");
	datas << QString("          value: dataItem[0].value");
	datas << QString("        }, {");
	datas << QString("          coord: toCoord,");
	datas << QString("       }]);");
	datas << QString("    }");
	datas << QString("  }");
	datas << QString("  return res;");
	datas << QString("};");
	body << "  " + datas.join("\r\n  ");
	body << "";

	QStringList optionSeries;
	optionSeries << QString("  var series = [];");
	optionSeries << QString("  [['%1', data]].forEach(function(item, i) {").arg(toCity);
	optionSeries << QString("    console.log(item);");
	optionSeries << QString("      series.push({");
	optionSeries << QString("        type: 'lines', zlevel: 2,");
	optionSeries << QString("        effect: {show: true, period: 4, trailLength: 0.02, symbol: 'arrow', symbolSize: 5,},");
	optionSeries << QString("        lineStyle: {normal: {width: 1, opacity: 1, curveness: .3, color: '%1'}},").arg(lineColor.name());
	optionSeries << QString("        data: convertData(item[1])}, {");
	optionSeries << QString("        type: 'effectScatter', coordinateSystem: 'geo', zlevel: 2,");
	optionSeries << QString("        rippleEffect: {period: 4, brushType: 'stroke', scale: 4},");
	optionSeries << QString("        label: {");
	optionSeries << QString("          normal: {");
	optionSeries << QString("             show: true, position: 'right', offset: [5, 0], fontSize: 15,");
	optionSeries << QString("             formatter: function(params) {return params.data.name;}");
	optionSeries << QString("          },");
	optionSeries << QString("          emphasis: {show: true}");
	optionSeries << QString("        },");
	optionSeries << QString("        symbol: 'circle',");
	optionSeries << QString("        symbolSize: function(val) {");
	optionSeries << QString("          return 6 + val[2] * 5;");
	optionSeries << QString("        },");
	optionSeries << QString("        itemStyle: {normal: {show: false, color: '%1'}},").arg(areaColor.name());
	optionSeries << QString("          data: item[1].map(function(dataItem) {");
	optionSeries << QString("            return {name: dataItem[0].name, value: geoCoordMap[dataItem[0].name].concat([dataItem[0].value])};");
	optionSeries << QString("          }),},");

	//被攻击点,可自行调整对应的值改变大小速度等
	optionSeries << QString("        {");
	optionSeries << QString("            type: 'scatter', coordinateSystem: 'geo', zlevel: 2,");
	optionSeries << QString("            rippleEffect: {period: 4, brushType: 'stroke', scale: 4},");
	optionSeries << QString("            label: {");
	optionSeries << QString("                normal: {");
	optionSeries << QString("                    show: true, position: 'right',");
	optionSeries << QString("                    color: '#0f0', formatter: '{b}',");
	optionSeries << QString("                    textStyle: {color: '#0f0'}");
	optionSeries << QString("                },");
	optionSeries << QString("                emphasis: {show: true, color: '#f60'}");
	optionSeries << QString("            },");
	optionSeries << QString("        }");
	optionSeries << QString("      );");
	optionSeries << QString("    }");
	optionSeries << QString("  );");
	body << optionSeries.join("\r\n") << "";

	QStringList optionBase = getOptionBase();
	QStringList optionGeo = getOptionGeo();

	QString option = QString("%1\r\n%2\r\n    series: series").arg(optionBase.join("\r\n")).arg(optionGeo.join("\r\n"));
	body << "  option = {";
	body << option;
	body << "  };";

	return newChart(body.join("\r\n"));
}

//使用代码
QStringList cityName, cityValue, cityPoint;
cityName << "上海" << "北京" << "成都" << "武汉" << "厦门" << "广州";
cityPoint << "121.48,31.22" << "116.46,39.92" << "104.06,30.67" << "114.31,30.52" << "118.1,24.46" << "113.23,23.16";
cityValue << "1" << "0" << "0" << "0" << "0" << "0";

echarts->setCityName(cityName);
echarts->setCityPoint(cityPoint);
echarts->setCityValue(cityValue);
echarts->setZoom(1.0);
echarts->newChartMove("上海");

加载全部内容

相关教程
猜你喜欢
用户评论