Elemento Place Search

L'PlaceSearchElement è un elemento HTML che esegue il rendering dei risultati di una ricerca di luoghi in un elenco. Esistono due modi per configurare l'elemento gmp-place-search:

Cerca nelle vicinanze

Seleziona un tipo di luogo dal menu per visualizzare i risultati di ricerca nelle vicinanze per quel tipo di luogo.

L'esempio seguente esegue il rendering dell'elemento Place Search in risposta a una ricerca nelle vicinanze. Per semplicità, sono elencati solo tre tipi di luoghi: caffè, ristorante e stazione di ricarica per veicoli elettrici. Quando viene selezionato un risultato, vengono visualizzati un indicatore e PlaceDetailsCompactElement per il luogo selezionato. Per aggiungere l'elemento Ricerca luoghi alla mappa, aggiungi un elemento gmp-place-search contenente un elemento gmp-place-nearby-search-request alla pagina HTML come mostrato nel seguente snippet:

<div class="list-container">
  <div id="map-container"></div>
  <div class="controls">
      <select name="types" class="type-select">
      <option value="">Select a place type</option>
      <option value="cafe">Cafe</option>
      <option value="restaurant">Restaurant</option>
      <option value="electric_vehicle_charging_station">EV charging station</option>
      </select>
  </div>

<div class="list-container">
  <gmp-place-search orientation="vertical" selectable>
      <gmp-place-all-content> </gmp-place-all-content>
      <gmp-place-nearby-search-request
      ></gmp-place-nearby-search-request>
  </gmp-place-search>
</div>

<div id="details-container">
   <gmp-place-details-compact orientation="horizontal">
      <gmp-place-details-place-request></gmp-place-details-place-request>
      <gmp-place-all-content></gmp-place-all-content>
  </gmp-place-details-compact>
</div>

Per selezionare gli elementi della pagina per l'interazione vengono utilizzate diverse chiamate querySelector:

  const mapContainer = document.getElementById("map-container");
  const placeSearch = document.querySelector("gmp-place-search");
  const placeSearchQuery = document.querySelector("gmp-place-nearby-search-request");
  const detailsContainer = document.getElementById("details-container");
  const placeDetails = document.querySelector("gmp-place-details-compact");
  const placeRequest = document.querySelector("gmp-place-details-place-request");
  const typeSelect = document.querySelector(".type-select");

Quando l'utente seleziona un tipo di luogo dal menu, l'elemento gmp-place-nearby-search-request viene aggiornato e l'elemento Ricerca luogo mostra i risultati (i marcatori vengono aggiunti nella funzione helper addMarkers): 

  typeSelect.addEventListener('change', (event) => {
    event.preventDefault();
    searchPlaces();
});

function searchPlaces(){
  const bounds = gMap.getBounds();
  placeDetailsPopup.map = null;

  if (typeSelect.value) {
  placeSearch.style.display = 'block';
  placeSearchQuery.maxResultCount = 10;
  placeSearchQuery.locationRestriction = { center: cent, radius: 1000 };
  placeSearchQuery.includedTypes = [typeSelect.value];

  placeSearch.addEventListener('gmp-load', addMarkers, { once: true });
  }
}

Visualizza l'esempio di codice completo

 
   

JavaScript

    
  const mapContainer = document.getElementById("map-container");
  const placeSearch = document.querySelector("gmp-place-search");
  const placeSearchQuery = document.querySelector("gmp-place-nearby-search-request");
  const detailsContainer = document.getElementById("details-container");
  const placeDetails = document.querySelector("gmp-place-details-compact");
  const placeRequest = document.querySelector("gmp-place-details-place-request");
  const typeSelect = document.querySelector(".type-select");

  let markers = {};
  let gMap;
  let placeDetailsPopup;
  let spherical;
  let AdvancedMarkerElement;
  let LatLngBounds;
  let LatLng;

  async function init() {
      console.log("init");
      ({ spherical } = await google.maps.importLibrary('geometry'));
      const {Map} = await google.maps.importLibrary("maps");
      await google.maps.importLibrary("places");
      ({AdvancedMarkerElement} = await google.maps.importLibrary("marker"));
      ({LatLngBounds, LatLng} = await google.maps.importLibrary("core"));

      let mapOptions = {
          center: {lat: -37.813, lng: 144.963},
          zoom: 16,
          mapTypeControl: false,
          clickableIcons: false,
          mapId: 'DEMO_MAP_ID'
      };

      gMap = new Map(mapContainer, mapOptions);

      placeDetailsPopup = new AdvancedMarkerElement({
          map: null,
          content: placeDetails,
          zIndex: 100
      });

      findCurrentLocation();

      gMap.addListener('click', (e) => {
          hidePlaceDetailsPopup();
      });

      typeSelect.addEventListener('change', (event) => {
              event.preventDefault();
              searchPlaces();
      });

      placeSearch.addEventListener("gmp-select", ({ place }) => {
          if (markers[place.id]) {
              markers[place.id].click();
          }
      });
  }

  function searchPlaces(){
      const bounds = gMap.getBounds();
      const cent = gMap.getCenter();
      const ne = bounds.getNorthEast();
      const sw = bounds.getSouthWest();
      const diameter = spherical.computeDistanceBetween(ne, sw);
      const cappedRadius = Math.min((diameter / 2 ), 50000); // Radius cannot be more than 50000.

      placeDetailsPopup.map = null;

      for(const markerId in markers){
          if (Object.prototype.hasOwnProperty.call(markers, markerId)) {
                  markers[markerId].map = null;
              }
      }

      markers = {};
      if (typeSelect.value) {
          mapContainer.style.height = '75vh';
          placeSearch.style.display = 'block';
          placeSearchQuery.maxResultCount = 10;
          placeSearchQuery.locationRestriction = { center: cent, radius: cappedRadius };
          placeSearchQuery.includedTypes = [typeSelect.value];
          placeSearch.addEventListener('gmp-load', addMarkers, { once: true });
          console.log("selection!");
          console.log(cappedRadius);
      }
  }

  async function addMarkers(){
      const bounds = new LatLngBounds();
        placeSearch.style.display = 'block';

      if(placeSearch.places.length > 0){
          placeSearch.places.forEach((place) => {
              let marker = new AdvancedMarkerElement({
                  map: gMap,
                  position: place.location
              });

              marker.metadata = {id: place.id};
              markers[place.id] = marker;
              bounds.extend(place.location);

              marker.addListener('click',(event) => {
                  placeRequest.place = place;
                  placeDetails.style.display = 'block';

                  placeDetailsPopup.position = place.location;
                  placeDetailsPopup.map = gMap;

                  gMap.fitBounds(place.viewport, {top: 0, left: 400});

                  placeDetails.addEventListener('gmp-load',() => {
                      gMap.fitBounds(place.viewport, {top: 0, right: 450});
                  }, { once: true });

              });
              gMap.setCenter(bounds.getCenter());
              gMap.fitBounds(bounds);
          });
      }
  }

  async function findCurrentLocation(){
      const { LatLng } = await google.maps.importLibrary("core");
      if (navigator.geolocation) {
          navigator.geolocation.getCurrentPosition(
            (position) => {
              const pos = new LatLng(position.coords.latitude,position.coords.longitude);
              gMap.panTo(pos);
              gMap.setZoom(16);
            },
            () => {
              console.log('The Geolocation service failed.');
              gMap.setZoom(16);
            },
          );
        } else {
          console.log("Your browser doesn't support geolocation");
          gMap.setZoom(16);
        }
  }

  function hidePlaceDetailsPopup() {
      if (placeDetailsPopup.map) {
          placeDetailsPopup.map = null;
          placeDetails.style.display = 'none';
      }
  }

  init();
 
 
   

CSS

    
  html,
  body {
      height: 100%;
      margin: 0;
  }

  body {
      display: flex;
      flex-direction: column;
      font-family: Arial, Helvetica, sans-serif;
  }

  h1 {
      font-size: large;
      text-align: center;
  }

  #map-container {
      flex-grow: 1;
      max-height:600px;
      box-sizing: border-box;
      width: 100%;
      height: 100vh;
  }

  .controls {
      position: absolute;
      top: 40px;
      right: 40px;
  }

  .list-container {
      display: flex;
      position: absolute;
      max-height: 500px;
      top: 80px;
      right: 40px;
      overflow-y: none;
  }

  .type-select {
      width: 400px;
      height: 32px;
      border: 1px solid #000;
      border-radius: 10px;
      flex-grow: 1;
      padding: 0 10px;
    }

  gmp-place-search {
        width: 400px;
        margin: 0;
        border-radius: 10px;
        display: none;
        border: none;
  }

  gmp-place-details-compact {
      width: 350px;
      max-height: 800px;
      margin-right: 20px;
      display: none;
      border: none;
  }

  gmp-place-details-compact::after {
      content: '';
      position: absolute;
      bottom: -18px;
      left: 50%;
      transform: translateX(-50%);
      width: 20px;
      height: 20px;
      background-color: white;
      box-shadow: 2px 2px 5px 0 rgba(0,0,0,0.2);
      z-index: 1;
      clip-path: polygon(0% 0%, 100% 0%, 50% 100%);
      transform-origin: center center;
  }

  @media (prefers-color-scheme: dark) {
      /* Style for Dark mode */
      gmp-place-details-compact::after {
          background-color: #131314;
      }
  }
 
 
   

HTML

    
<!DOCTYPE html>
  <html>
    <head>
      <title>Place Search with Compact Place Details Element</title>
      <meta charset="utf-8">
      <link rel="stylesheet" href="style.css">
      <script type="module" src="./index.js"></script>
    </head>
    <body>
      <div id="map-container"></div>
      <div class="controls">
          <select name="types" class="type-select">
          <option value="">Select a place type</option>
          <option value="cafe">Cafe</option>
          <option value="restaurant">Restaurant</option>
          <option value="electric_vehicle_charging_station">EV charging station</option>
          </select>
      </div>
      <div class="list-container">
          <gmp-place-search orientation="vertical" selectable>
              <gmp-place-all-content> </gmp-place-all-content>
              <gmp-place-nearby-search-request
              ></gmp-place-nearby-search-request>
          </gmp-place-search>
      </div>
      <div id="details-container">
          <gmp-place-details-compact orientation="horizontal">
            <gmp-place-details-place-request></gmp-place-details-place-request>
            <gmp-place-all-content></gmp-place-all-content>
          </gmp-place-details-compact>
      </div>
      <script>(g=>{var h,a,k,p="The Google Maps JavaScript API",c="google",l="importLibrary",q="__ib__",m=document,b=window;b=b[c]||(b[c]={});var d=b.maps||(b.maps={}),r=new Set,e=new URLSearchParams,u=()=>h||(h=new Promise(async(f,n)=>{await (a=m.createElement("script"));e.set("libraries",[...r]+"");for(k in g)e.set(k.replace(/[A-Z]/g,t=>"_"+t[0].toLowerCase()),g[k]);e.set("callback",c+".maps."+q);a.src=`https://maps.${c}apis.com/maps/api/js?`+e;d[q]=f;a.onerror=()=>h=n(Error(p+" could not load."));a.nonce=m.querySelector("script[nonce]")?.nonce||"";m.head.append(a)}));d[l]?console.warn(p+" only loads once. Ignoring:",g):d[l]=(f,...n)=>r.add(f)&&u().then(()=>d[l](f,...n))})
        ({key: "YOUR_API_KEY", v: "weekly"});
      </script>
    </body>
  </html>
  

Ricerca tramite richiesta di testo

Inserisci un termine di ricerca nel campo di input e fai clic sul pulsante Cerca per visualizzare un elenco di luoghi che corrispondono al termine.

Questo esempio esegue il rendering dell'elemento Ricerca di luoghi in risposta a una ricerca di testo dell'utente. Quando viene selezionato un risultato, vengono visualizzati un indicatore e un PlaceDetailsCompactElement per il luogo selezionato. Per aggiungere l'elemento Ricerca luoghi alla mappa, aggiungi un elemento gmp-place-search contenente un elemento gmp-place-search-text-search-request alla pagina HTML come mostrato nel seguente snippet:

  <div id="map-container"></div>
  <div class="controls">
  <input type="text" class="query-input" />
  <button class="search-button">Search</button>
  </div>

  <div class="list-container">
    <gmp-place-search orientation="vertical" selectable>
        <gmp-place-all-content> </gmp-place-all-content>
        <gmp-place-text-search-request></gmp-place-text-search-request>
    </gmp-place-search>
  </div>

  <div id="details-container">
      <gmp-place-details-compact orientation="horizontal">
          <gmp-place-details-place-request></gmp-place-details-place-request>
          <gmp-place-all-content></gmp-place-all-content>
      </gmp-place-details-compact>
  </div>

Per selezionare gli elementi della pagina per l'interazione vengono utilizzate diverse chiamate querySelector:

  const mapContainer = document.getElementById("map-container");
  const placeSearch = document.querySelector("gmp-place-search");
  const placeSearchQuery = document.querySelector("gmp-place-text-search-request");
  const queryInput = document.querySelector(".query-input");
  const searchButton = document.querySelector(".search-button");
  const detailsContainer = document.getElementById("details-container");
  const placeDetails = document.querySelector("gmp-place-details-compact");
  const placeRequest = document.querySelector("gmp-place-details-place-request");

Quando la funzione di ricerca viene eseguita dopo che l'utente ha inserito una query di ricerca, l'elemento gmp-place-text-search-request viene aggiornato e l'elemento Ricerca luoghi mostra i risultati (i marcatori vengono aggiunti nella funzione helper addMarkers): 

searchButton.addEventListener("click", searchPlaces);
queryInput.addEventListener("keydown", (event) => {
    if (event.key == 'Enter') {
        event.preventDefault();
        searchPlaces();
    }
  });

function searchPlaces(){
  if (queryInput.value) {
      placeSearch.style.display = 'block';
      placeSearchQuery.textQuery = queryInput.value;
      placeSearchQuery.locationBias = gMap.getBounds();
      placeSearch.addEventListener('gmp-load', addMarkers, { once: true });
  }
}

Visualizza l'esempio di codice completo

 
   

JavaScript

    
  const mapContainer = document.getElementById("map-container");
  const placeSearch = document.querySelector("gmp-place-search");
  const placeSearchQuery = document.querySelector("gmp-place-text-search-request");
  const queryInput = document.querySelector(".query-input");
  const searchButton = document.querySelector(".search-button");
  const detailsContainer = document.getElementById("details-container");
  const placeDetails = document.querySelector("gmp-place-details-compact");
  const placeRequest = document.querySelector("gmp-place-details-place-request");
  let markers = {};
  let previousSearchQuery = '';
  let gMap;
  let placeDetailsPopup;

  let AdvancedMarkerElement;
  let LatLngBounds;
  let LatLng;

  async function init() {
      const {Map} = await google.maps.importLibrary("maps");
      await google.maps.importLibrary("places");
      ({AdvancedMarkerElement} = await google.maps.importLibrary("marker"));
      ({LatLngBounds, LatLng} = await google.maps.importLibrary("core"));

      let mapOptions = {
          center: {lat: 37.422, lng: -122.085},
          zoom: 2,
          mapTypeControl: false,
          clickableIcons: false,
          mapId: 'DEMO_MAP_ID'
      };

      gMap = new Map(mapContainer, mapOptions);

      placeDetailsPopup = new AdvancedMarkerElement({
          map: null,
          content: placeDetails,
          zIndex: 100
      });

      findCurrentLocation();

      gMap.addListener('click', (e) => {
          hidePlaceDetailsPopup();
      });

      searchButton.addEventListener("click", searchPlaces);
      queryInput.addEventListener("keydown", (event) => {
          if (event.key == 'Enter') {
              event.preventDefault();
              searchPlaces();
          }
      });

      placeSearch.addEventListener("gmp-select", ({ place }) => {
          if (markers[place.id]) {
              markers[place.id].click();
          }
      });
  }

  function searchPlaces(){
      if (queryInput.value.trim() === previousSearchQuery) {
          return;
      }
      previousSearchQuery = queryInput.value.trim();
      placeDetailsPopup.map = null;

      for(const markerId in markers){
          if (Object.prototype.hasOwnProperty.call(markers, markerId)) {
                  markers[markerId].map = null;
              }
      }
      markers = {};
      if (queryInput.value) {
          // mapContainer.style.height = '75vh';
          placeSearch.style.display = 'block';
          placeSearchQuery.textQuery = queryInput.value;
          placeSearchQuery.locationBias = gMap.getBounds();
          placeSearch.addEventListener('gmp-load', addMarkers, { once: true });
      }
  }

  async function addMarkers(){
      const bounds = new LatLngBounds();

      if(placeSearch.places.length > 0){
          placeSearch.places.forEach((place) => {
              let marker = new AdvancedMarkerElement({
                  map: gMap,
                  position: place.location
              });

              marker.metadata = {id: place.id};
              markers[place.id] = marker;
              bounds.extend(place.location);

              marker.addListener('click',(event) => {
                  placeRequest.place = place;
                  placeDetails.style.display = 'block';

                  placeDetailsPopup.position = place.location;
                  placeDetailsPopup.map = gMap;

                  gMap.fitBounds(place.viewport, {top: 200, right: 450});

              });

              gMap.setCenter(bounds.getCenter());
              gMap.fitBounds(bounds);
          });
      }
  }

  async function findCurrentLocation(){
      const { LatLng } = await google.maps.importLibrary("core");
      if (navigator.geolocation) {
          navigator.geolocation.getCurrentPosition(
            (position) => {
              const pos = new LatLng(position.coords.latitude,position.coords.longitude);
              gMap.panTo(pos);
              gMap.setZoom(16);
            },
            () => {
              console.log('The Geolocation service failed.');
              gMap.setZoom(16);
            },
          );
        } else {
          console.log("Your browser doesn't support geolocation");
          gMap.setZoom(16);
        }
  }

  function hidePlaceDetailsPopup() {
      if (placeDetailsPopup.map) {
          placeDetailsPopup.map = null;
          placeDetails.style.display = 'none';
      }
  }

  init();
  
 
   

CSS

    
  html,
  body {
      height: 100%;
      margin: 0;
  }

  body {
      display: flex;
      flex-direction: column;
      font-family: Arial, Helvetica, sans-serif;
  }

  h1 {
      font-size: large;
      text-align: center;
  }

  #map-container {
      flex-grow: 1;
      max-height:600px;
      box-sizing: border-box;
      width: 100%;
      height: 100vh;
  }

  .controls {
      border-radius: 5px;
      position: absolute;
      top: 40px;
      right: 40px;
  }

  .search-button {
      background-color: #4b4b4b;
      color: #fff;
      border: 1px solid #000;
      border-radius: 10px;
      width: 80px;
      height: 40px;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.35);
  }

  .query-input {
      border: 1px solid #ccc;
      border-radius: 10px;
      width: 315px;
      height: 40px;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.35);
  }

  .list-container {
      display: flex;
      position: absolute;
      max-height: 500px;
      top: 100px;
      right: 40px;
      overflow-y: none;
  }

  gmp-place-search {
       width: 400px;
       margin: 0;
        border-radius: 10px;
       display: none;
       border: none;
  }

  gmp-place-details-compact {
      width: 350px;
      max-height: 800px;
      display: none;
      border: none;
      transform: translateY(calc(-40%));
  }

  gmp-place-details-compact::after {
      content: '';
      position: absolute;
      bottom: -18px;
      left: 50%;
      transform: translateX(-50%);
      width: 20px;
      height: 20px;
      background-color: white;
      box-shadow: 2px 2px 5px 0 rgba(0,0,0,0.2);
      z-index: 1;
      clip-path: polygon(0% 0%, 100% 0%, 50% 100%);
      transform-origin: center center;
  }

  @media (prefers-color-scheme: dark) {
      /* Style for Dark mode */
      gmp-place-details-compact::after {
          background-color: #131314;
      }
  }
  
 
   

HTML

    
<!DOCTYPE html>
<html>
  <head>
    <title>Place Search with a Details Popup</title>
    <meta charset="utf-8">
    <link rel="stylesheet" href="style.css">
    <script type="module" src="./index.js"></script>
  </head>

  <body>
    <div id="map-container"></div>
    <div class="controls">
    <input type="text" class="query-input" />
    <button class="search-button">Search</button>
    </div>

    <div class="list-container">
      <gmp-place-search orientation="vertical" selectable>
          <gmp-place-all-content> </gmp-place-all-content>
          <gmp-place-text-search-request></gmp-place-text-search-request>
      </gmp-place-search>
    </div>

    <div id="details-container">
        <gmp-place-details-compact orientation="horizontal">
            <gmp-place-details-place-request></gmp-place-details-place-request>
            <gmp-place-all-content></gmp-place-all-content>
        </gmp-place-details-compact>
    </div>

    <script>(g=>{var h,a,k,p="The Google Maps JavaScript API",c="google",l="importLibrary",q="__ib__",m=document,b=window;b=b[c]||(b[c]={});var d=b.maps||(b.maps={}),r=new Set,e=new URLSearchParams,u=()=>h||(h=new Promise(async(f,n)=>{await (a=m.createElement("script"));e.set("libraries",[...r]+"");for(k in g)e.set(k.replace(/[A-Z]/g,t=>"_"+t[0].toLowerCase()),g[k]);e.set("callback",c+".maps."+q);a.src=`https://maps.${c}apis.com/maps/api/js?`+e;d[q]=f;a.onerror=()=>h=n(Error(p+" could not load."));a.nonce=m.querySelector("script[nonce]")?.nonce||"";m.head.append(a)}));d[l]?console.warn(p+" only loads once. Ignoring:",g):d[l]=(f,...n)=>r.add(f)&&u().then(()=>d[l](f,...n))})
      ({key: "YOUR_API_KEY", v: "weekly"});
    </script>

  </body>
</html>