Qt编写地图实现海量点位标注

void frmMapMarkers::addMarker()
{
    //先清空原有的所有覆盖物包括标注点
    runJs("deleteOverlay('')");

    //取出定位点经纬度大值
    QString point = ui->txtPointLeftBottom->text();
    QStringList list = point.split(",");
    double lng = list.first().toDouble();
    double lat = list.last().toDouble();

    //经纬度小数点值最大值
    float dotLng = 0.015;
    float dotLat = 0.011;

    //限定最大数量
    int index = ui->cboxType->currentIndex();
    int count = ui->cboxCount->currentText().toInt();
    int maxCount = 300;
    if (index == 1) {
        maxCount = 1000;
    } else if (index == 2) {
        maxCount = 50000;
    }

    if (count > maxCount) {
        QString info = QString("由于官方该方法性能有限, 建议数量不要超过 %1 !").arg(maxCount);
        QUIHelper::showMessageBoxError(info);
        return;
    }

    //不同类型不同处理,随机模拟经纬度,可以自行调整范围值
    if (index == 0) {
        //添加标注点
        for (int i = 0; i < count; ++i) {
            QStringList points = QUIHelper::getRandPoint(1, lng, lat, dotLng, dotLat);
            QString js = QString("addMarker('', '', '', '', 30, '%1')").arg(points.first());
            runJs(js);
        }
    } else if (index == 1) {
        //添加点聚合
        QStringList points = QUIHelper::getRandPoint(count, lng, lat, dotLng, dotLat);
        QString js = QString("addMarkerClusterer('%1')").arg(points.join("|"));
        runJs(js);
    } else if (index == 2) {
        //添加海量点
        QStringList points = QUIHelper::getRandPoint(count, lng, lat, dotLng, dotLat);
        QString js = QString("addPointCollection('%1', '#A279C5')").arg(points.join("|"));
        runJs(js);
    }
}

void frmMapMarkers::on_btnDo_clicked()
{
    //自动获取当前区域边界
    runJs("getBounds()");
}