2025-shino/loc-chase2.html at 6e91d174c29610c8b2d2db7ea5db062517588c50

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2025-shino / loc-chase2.html
takeuchi shino on 19 Dec 3 KB Update loc-chase2.html
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<!DOCTYPE html>
<html lang="ja">
<head>
  <meta charset="utf-8">
  <title>GNSS宝探し</title>

  <!-- Leaflet（CDN） -->
  <link
    rel="stylesheet"
    href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css"
  >
  <script
    src="https://unpkg.com/leaflet@1.9.4/dist/leaflet.js"
    defer
  ></script>

  <!-- 自分のJS -->
  <script defer>
    document.addEventListener("DOMContentLoaded", () => {
      var mymap = L.map("locationmap").setView([38.891, 139.824], 16);

      L.tileLayer("https://{s}.tile.osm.org/{z}/{x}/{y}.png", {
        attribution:
          '&copy; <a href="http://osm.org/copyright">OpenStreetMap</a> contributors'
      }).addTo(mymap);

      var locmarker = L.marker(mymap.getCenter()).addTo(mymap);
      locmarker.bindPopup("STARTおしてね").openPopup();

      var nTrial = 100;
      var watchId = null;

      function stopLOC() {
        if (watchId != null) {
          navigator.geolocation.clearWatch(watchId);
          document.getElementById("title").textContent = "stop";
          locmarker.setPopupContent("停めました");
        }
        watchId = null;
      }

      function tryWatchLOC() {
        stopLOC();
        watchId = navigator.geolocation.watchPosition(
          onSuccess,
          onError,
          { maximumAge: 0, timeout: 3000, enableHighAccuracy: true }
        );
        document.getElementById("title").textContent = "START!!";
      }

      // 共通処理
      function updateLocation(latlng) {
        mymap.panTo(latlng);

        const goalLat = 38.892;
        const goalLng = 139.825;

        const dLat = Math.abs(latlng.lat - goalLat);
        const dLng = Math.abs(latlng.lng - goalLng);

        let message;

        if (dLat < 0.0003 && dLng < 0.0003) {
          message = "🎉 GOAL!! 宝を見つけました！";
        } else if (dLat < 0.001 && dLng < 0.001) {
          message = "おしい！もう少し！";
        } else {
          message = "探索中…";
        }

        locmarker
          .setLatLng(latlng)
          .setPopupContent(message)
          .openPopup();
      }

      // GPS 成功時
      function onSuccess(pos) {
        var latlng = L.latLng(
          pos.coords.latitude,
          pos.coords.longitude
        );
        updateLocation(latlng);
      }

      function onError(err) {
        var restN = "あと" + (--nTrial) + "回試行します。";
        locmarker.setPopupContent("捕捉失敗:" + restN).openPopup();
        if (nTrial <= 0) {
          navigator.geolocation.clearWatch(watchId);
        }
      }

      // 地図クリック対応
      mymap.on("click", function (e) {
        console.log("クリック:", e.latlng);
        stopLOC();
        updateLocation(e.latlng);
      });

      // スマホタップ対応
      mymap.on("tap", function (e) {
        console.log("タップ:", e.latlng);
        stopLOC();
        updateLocation(e.latlng);
      });

      // ボタン設定
      document.getElementById("start")
        .addEventListener("click", tryWatchLOC);

      document.getElementById("stop")
        .addEventListener("click", stopLOC);

    }, false);
  </script>

  <style>
    #locationmap {
      width: 90vw;
      height: 75vw; /* ←元の指定に戻しました */
      margin: auto;
    }
  </style>
</head>

<body>
  <h1>たからさがし <span id="title"></span></h1>

  <p>
    <button id="start" type="button">START</button>
    <button id="stop" type="button">STOP</button>
  </p>

  <div id="locationmap"></div>
</body>
</html>