Element listy miejsc

PlaceListElement to element HTML, który renderuje wyniki wyszukiwania miejsc na liście. Element gmp-place-list możesz skonfigurować na 2 sposoby:

Wyszukiwanie według żądania tekstowego

W tym przykładzie element Listy Miejsc jest renderowany w odpowiedzi na wyszukiwanie tekstowe przez użytkownika. Po wybraniu wyniku wyświetla się okno z informacjami o wybranym miejscu. Aby dodać do mapy element Lista miejsc, dodaj do strony HTML element gmp-place-list, jak pokazano w tym fragmencie kodu:

<gmp-map center="-37.813,144.963" zoom="2" map-id="DEMO_MAP_ID">
  <div class="overlay" slot="control-inline-start-block-start">
    <div class="controls">
      <input type="text" class="query-input" />
      <button class="search-button">Search</button>
    </div>
    <div class="list-container">
      <gmp-place-list selectable></gmp-place-list>
    </div>
  </div>
  <gmp-place-details size="large"></gmp-place-details>
</gmp-map>

Do wybierania elementów strony do interakcji służy kilka wywołań querySelector:

const map = document.querySelector('gmp-map');
const placeList = document.querySelector('gmp-place-list');
const queryInput = document.querySelector('.query-input');
const searchButton = document.querySelector('.search-button');
const placeDetails = document.querySelector('gmp-place-details');

Gdy użytkownik kliknie przycisk wyszukiwania, wywoływana jest funkcja configureFromSearchByTextRequest, a element Lista miejsc wyświetla wyniki (znaczniki są dodawane w funkcji pomocniczej addMarkers). Poniższy fragment kodu pokazuje kod do obsługi zdarzeń kliknięcia: 

searchButton.addEventListener('click', () => {
  for (marker in markers) {
    markers[marker].map = null;
  }
  markers = {};
  if (queryInput.value) {
    placeList
        .configureFromSearchByTextRequest({
          textQuery: queryInput.value,
          locationBias: map.innerMap.getBounds()
        })
        .then(addMarkers);
  }
});

Pełny przykład kodu

W tym przykładzie komponent interfejsu użytkownika Lista miejsc służy do wyświetlania miejsc na podstawie wyszukiwania tekstowego za pomocą configureFromSearchByTextRequest. Dodaje on do mapy klikalne znaczniki, które po wybraniu wyświetlają szczegóły miejsca.

JavaScript

const map = document.querySelector('gmp-map');
const placeList = document.querySelector('gmp-place-list');
const queryInput = document.querySelector('.query-input');
const searchButton = document.querySelector('.search-button');
const placeDetails = document.querySelector('gmp-place-details');
let markers = {};
let infowindow = {};
async function init() {
    await google.maps.importLibrary('places');
    const {
        InfoWindow
    } = await google.maps.importLibrary('maps');
    infowindow = new InfoWindow();
    // Call geolocation helper function to center map.
    findCurrentLocation();
    map.innerMap.setOptions({
        mapTypeControl: false,
        clickableIcons: false,
    });
    // Handle click on search button.
    searchButton.addEventListener('click', () => {
        for (marker in markers) {
            markers[marker].map = null;
        }
        markers = {};
        if (queryInput.value) {
            placeList
                .configureFromSearchByTextRequest({
                    textQuery: queryInput.value,
                    locationBias: map.innerMap.getBounds()
                })
                .then(addMarkers);
        }
    });
    // Handle the user's selection on the Place List.
    placeList.addEventListener('gmp-placeselect', ({
        place
    }) => {
        markers[place.id].click();
    });
}
// Helper function to add markers.
async function addMarkers() {
    const {
        AdvancedMarkerElement
    } = await google.maps.importLibrary('marker');
    const {
        LatLngBounds
    } = await google.maps.importLibrary('core');
    const bounds = new LatLngBounds();
    if (placeList.places.length > 0) {
        placeList.places.forEach((place) => {
            let marker = new AdvancedMarkerElement({
                map: map.innerMap,
                position: place.location
            });
            marker.metadata = {
                id: place.id
            };
            markers[place.id] = marker;
            bounds.extend(place.location);
            marker.addListener('click', (event) => {
                if (infowindow.isOpen) {
                    infowindow.close();
                }
                placeDetails.configureFromPlace(place);
                placeDetails.style.width = '350px';
                infowindow.setOptions({
                    content: placeDetails
                });
                infowindow.open({
                    anchor: marker,
                    map: map.innerMap
                });
                placeDetails.addEventListener('gmp-load', () => {
                    map.innerMap.fitBounds(
                        place.viewport, {
                            top: placeDetails.offsetHeight || 206,
                            left: 200
                        });
                });
            });
            map.innerMap.setCenter(bounds.getCenter());
            map.innerMap.fitBounds(bounds);
        });
    }
}
// Helper function to center map on current device location.
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);
                map.innerMap.panTo(pos);
                map.innerMap.setZoom(16);
            },
            () => {
                console.log('The Geolocation service failed.');
                map.innerMap.setZoom(16);
            },
        );
    } else {
        console.log('Your browser doesn\'t support geolocation');
        map.innerMap.setZoom(16);
    }
}

init();

CSS

html,
body {
    height: 100%;
    margin: 0;
}
body {
    display: flex;
    flex-direction: column;
    font-family: Arial, Helvetica, sans-serif;
}
h1 {
    font-size: 16px;
    text-align: center;
}
gmp-map {
    box-sizing: border-box;
    padding: 0 20px 20px;
}
.overlay {
    margin: 20px;
    width: 400px;
}
.controls {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
    height: 32px;
}
.search-button {
    background-color: #5491f5;
    color: #fff;
    border: 1px solid #ccc;
    border-radius: 5px;
    width: 100px;
}
.query-input {
    border: 1px solid #ccc;
    border-radius: 5px;
    flex-grow: 1;
    padding: 10px;
}
.list-container {
    height: 600px;
    overflow: auto;
    border-radius: 10px;
}
gmp-place-list {
    background-color: #fff;
}
gmp-place-details {
    width: 320px;
}

HTML

<!DOCTYPE html>
<html>
  <head>
    <title>Place List Text Search with Google Maps</title>
    <meta charset="utf-8">
    <link rel="stylesheet" type="text/css" href="style.css">

  </head>
  <body>
    <h1>Place List Text Search with Google Maps</h1>
    <gmp-map center="-37.813,144.963" zoom="2" map-id="DEMO_MAP_ID">
        <div class="overlay" slot="control-inline-start-block-start">
          <div class="controls">
            <input type="text" class="query-input" />
            <button class="search-button">Search</button>
          </div>
          <div class="list-container">
            <gmp-place-list selectable></gmp-place-list>
          </div>
        </div>
        <gmp-place-details size="large"></gmp-place-details>
    </gmp-map>
    <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: "alpha"
      });
    </script>
  </body>
</html>

Prośba o wyszukiwanie w pobliżu

W tym przykładzie element Listy Miejsc jest renderowany w odpowiedzi na wyszukiwanie w pobliżu. Dla ułatwienia wymieniono tylko 3 typy miejsc: kawiarnię, restaurację i stację ładowania pojazdów elektrycznych. Po wybraniu wyniku wyświetla się okno z informacjami o wybranym miejscu. Aby dodać do mapy element Lista miejsc, dodaj do strony HTML element gmp-place-list, jak pokazano w tym fragmencie kodu:

<gmp-map center="-37.813,144.963" zoom="10" map-id="DEMO_MAP_ID">
<div class="overlay" slot="control-inline-start-block-start">
  <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>
    <button class="search-button">Search</button>
  </div>
  <div class="list-container">
    <gmp-place-list selectable></gmp-place-list>
  </div>
</div>

<gmp-place-details size="large"></gmp-place-details>
</gmp-map>

Do wybierania elementów strony do interakcji służy kilka wywołań querySelector:

const map = document.querySelector("gmp-map");
const placeList = document.querySelector('gmp-place-list');
const typeSelect = document.querySelector('.type-select');
const searchButton = document.querySelector('.search-button');
const placeDetails = document.querySelector('gmp-place-details');

Gdy użytkownik kliknie przycisk wyszukiwania, wywoływana jest funkcja configureFromSearchNearbyRequest, a element Lista miejsc wyświetla wyniki (znaczniki są dodawane w funkcji pomocniczej addMarkers). Ten fragment kodu zawiera też kod do obsługi zdarzeń kliknięcia na liście miejsc za pomocą zdarzenia gmp-placeselect: 

searchButton.addEventListener('click', () => {
  for (marker in markers) {
    markers[marker].map = null;
  }
  markers = {};
  if (typeSelect.value) {
    placeList
        .configureFromSearchNearbyRequest({
          locationRestriction: getContainingCircle(map.innerMap.getBounds()),
          includedPrimaryTypes: [typeSelect.value],
        })
        .then(addMarkers);
    placeList.addEventListener('gmp-placeselect', ({place}) => {
      markers[place.id].click();
    });
  }
});

Pełny przykład kodu

W tym przykładzie komponent interfejsu użytkownika Lista miejsc służy do wyświetlania miejsc na podstawie wyszukiwania w pobliżu za pomocą configureFromSearchNearbyRequest. Dodaje też do mapy klikalne znaczniki, które po wybraniu wyświetlają szczegóły miejsca.

JavaScript

const map = document.querySelector("gmp-map");
const placeList = document.querySelector("gmp-place-list");
const typeSelect = document.querySelector(".type-select");
const searchButton = document.querySelector(".search-button");
const placeDetails = document.querySelector("gmp-place-details");
let markers = {};
let infowindow = {};
let mapCenter;

async function init() {
    await google.maps.importLibrary("places");
    const {InfoWindow} = await google.maps.importLibrary("maps");
    const { spherical } = await google.maps.importLibrary("geometry");

    infowindow = new InfoWindow();

    function getContainingCircle(bounds) {
        const diameter = spherical.computeDistanceBetween(
            bounds.getNorthEast(),
            bounds.getSouthWest()
        );
        return { center: bounds.getCenter(), radius: diameter / 2 };
    }

    findCurrentLocation();

    map.innerMap.setOptions({
        mapTypeControl: false,
        clickableIcons: false,
    });

    searchButton.addEventListener("click", () => {
        for(marker in markers){
            markers[marker].map = null;
        }
        markers = {};

        if (typeSelect.value) {
            placeList.configureFromSearchNearbyRequest({
                locationRestriction: getContainingCircle(
                    map.innerMap.getBounds()
                ),
                includedPrimaryTypes: [typeSelect.value],
            }).then(addMarkers);

            placeList.addEventListener("gmp-placeselect", ({ place }) => {
                markers[place.id].click();
            });
        }
    });
}

async function addMarkers(){
    const { AdvancedMarkerElement } = await google.maps.importLibrary("marker");
    const { LatLngBounds } = await google.maps.importLibrary("core");

    const bounds = new LatLngBounds();

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

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

            marker.addListener('click',(event) => {
                if(infowindow.isOpen){
                    infowindow.close();
                }
                placeDetails.configureFromPlace(place);
                placeDetails.style.width = "350px";
                infowindow.setOptions({
                    content: placeDetails
                });
                infowindow.open({
                    anchor: marker,
                    map: map.innerMap
                });
                placeDetails.addEventListener('gmp-load',() => {
                    map.innerMap.fitBounds(place.viewport, {top: placeDetails.offsetHeight || 206, left: 200});
                });

            });
            map.innerMap.setCenter(bounds.getCenter());
            map.innerMap.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);
            map.innerMap.panTo(pos);
            map.innerMap.setZoom(14);
          },
          () => {
            console.log('The Geolocation service failed.');
            map.innerMap.setZoom(14);
          },
        );
      } else {
        console.log("Your browser doesn't support geolocation");
        map.innerMap.setZoom(14);
      }

}

init();

CSS

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

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

  h1 {
      font-size: 16px;
      text-align: center;
  }

  gmp-map {
      box-sizing: border-box;
      padding: 0 20px 20px;
  }

  .overlay {
      margin: 20px;
      width: 400px;
  }

  .controls {
      display: flex;
      gap: 10px;
      margin-bottom: 10px;
      height: 32px;
  }

  .search-button {
      background-color: #5491f5;
      color: #fff;
      border: 1px solid #ccc;
      border-radius: 5px;
      width: 100px;
  }

  .type-select {
      border: 1px solid #ccc;
      border-radius: 5px;
      flex-grow: 1;
      padding: 0 10px;
  }

  .list-container {
      height: 600px;
      overflow: auto;
      border-radius: 10px;
  }

  gmp-place-list {
      background-color: #fff;
  }

HTML

<!DOCTYPE html>
<html>
  <head>
    <title>Place List Nearby Search with Google Maps</title>
    <meta charset="utf-8">
    <link rel="stylesheet" type="text/css" href="style.css">
  </head>
  <body>
    <h1>Place List Nearby Search with Google Maps</h1>
    <gmp-map center="-37.813,144.963" zoom="10" map-id="DEMO_MAP_ID">
      <div class="overlay" slot="control-inline-start-block-start">
        <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>
          <button class="search-button">Search</button>
        </div>
        <div class="list-container">
          <gmp-place-list selectable></gmp-place-list>
        </div>
      </div>
      <gmp-place-details size="large"></gmp-place-details>
    </gmp-map>

    <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: "alpha"
      });
    </script>
  </body>
</html>