Question

我想用Python显示2D地图，然后用Python代码中的coursor坐标做一些事情。但我无法获得Python部分的坐标。继承我的代码：

from PyQt5.QtCore import *
from PyQt5.QtGui import *

from PyQt5.QtWebEngineWidgets import *
from PyQt5.QtWidgets import QWidget,QVBoxLayout, QApplication
from PyQt5.QtWebChannel import QWebChannel
import bs4

maphtml = '''

<!DOCTYPE HTML>
<!DOCTYPE HTML>
<html>
  <head>
    <meta name="robots" content="index, all" />    
    <script src="qrc:///qtwebchannel/qwebchannel.js"></script>
    <title>WebGL Earth API - Side-by-side - Basic Leaflet compatibility</title>
    <link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.7.2/leaflet.css" />
    <script src="http://cdn.leafletjs.com/leaflet-0.7.2/leaflet.js"></script>
    <script src="http://www.webglearth.com/v2/api.js"></script>
    <script>
      var backend;
        new QWebChannel(qt.webChannelTransport, function (channel) {
            backend = channel.objects.backend;
        });
      function init() {
        var m = {};

        start_(L, 'L');
        start_(WE, 'WE');

        function start_(API, suffix) {
          var mapDiv = 'map' + suffix;
          var map = API.map(mapDiv, {
            center: [51.505, -0.09],
            zoom: 4,
            dragging: true,
            scrollWheelZoom: true,
            proxyHost: 'http://srtm.webglearth.com/cgi-bin/corsproxy.fcgi?url='
          });
          m[suffix] = map;

          //Add baselayer
          API.tileLayer('http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png',{
            attribution: '© OpenStreetMap contributors'
          }).addTo(map);

          //Add TileJSON overlay
          var json = {"profile": "mercator", "name": "Grand Canyon USGS", "format": "png", "bounds": [-112.26379395, 35.98245136, -112.10998535, 36.13343831], "minzoom": 10, "version": "1.0.0", "maxzoom": 16, "center": [-112.18688965, 36.057944835, 13], "type": "overlay", "description": "", "basename": "grandcanyon", "tilejson": "2.0.0", "sheme": "xyz", "tiles": ["http://tileserver.maptiler.com/grandcanyon/{z}/{x}/{y}.png"]};
          if (API.tileLayerJSON) {
            var overlay2 = API.tileLayerJSON(json, map);
          } else {
            //If not able to display the overlay, at least move to the same location
            map.setView([json.center[1], json.center[0]], json.center[2]);
          }

          //Add simple marker
          var marker = API.marker([json.center[1], json.center[0]]).addTo(map);
          marker.bindPopup(suffix, 50);
          marker.openPopup();

          //Print coordinates of the mouse
          map.on('mousemove', function(e) {
            document.getElementById('coords').innerHTML = e.latlng.lat + ', ' + e.latlng.lng;
            backend.print(e.latlng.lat)
          });
        }

        //Synchronize view
        m['L'].on('move', function(e) {
          var center = m['L'].getCenter();
          var zoom = m['L'].getZoom();
          m['WE'].setView([center['lat'], center['lng']], zoom);
        });
      }
    </script>
    <style>
      html, body{padding: 0; margin: 0; overflow: hidden;}
      #mapL, #mapWE {position:absolute !important; top: 0; right: 0; bottom: 0; left: 0;
                     background-color: #fff; position: absolute !important;}
      #mapL {right: 0%;}
      #mapWE {left: 100%;}
      #coords {position: absolute; bottom: 0;}
    </style>
  </head>
  <body onload="javascript:init()">
    <div id="mapL"></div>
    <div id="mapWE"></div>
    <div id="coords"></div>
  </body>
</html>
'''

class Browser(QApplication):
    def __init__(self):
        QApplication.__init__(self, [])
        self.window = QWidget()
        self.window.setWindowTitle("Serial GPS Emulator");

        self.web = QWebEngineView(self.window)

        self.web.setHtml(maphtml)
        self.layout = QVBoxLayout(self.window)
        self.layout.addWidget(self.web)

        self.window.show()
        self.exec()

Browser()

如果代码保留在一个文件中，但如果完全不可能在一个文件中进行分割，这将是可以接受的。我想解决mny问题的第一步是从HTML / JS部分调用函数backend.print（“test”）也不起作用。我还注意到self.exec（）阻塞了其余的代码，有没有办法在地图运行时执行任何其他代码？谢谢！

Answer 1

我没有看到您的代码在哪里通过了后端。

在这种情况下，您必须创建一个可以注入的select @FilePath = @FileDestinationDir+'\NewFolder'+ltrim(rtrim(str(@StateContractId)))+'.xml' select @Cmd = ' bcp " ' + @SQLStr + '" queryout '+@FilePath+' -w -r "" -T -S ' +@@ServerName exec @Ret = master.dbo.xp_cmdshell @Cmd FETCH NEXT FROM Cur_StateAndLocalAward_StateContractId INTO @StateContractId -- @xml; END CLOSE Cur_StateAndLocalAward_StateContractId; DEALLOCATE Cur_StateAndLocalAward_StateContractId; GO类，并且对于要调用的方法，它必须是一个插槽，为此您必须使用Backend设置，该参数为如果pyqtSlot()是e.latlng，则收到的内容取决于您发送的内容。在插槽中，您必须分开必要的部分。

QJsonValue

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1 个答案: