माउस इवेंट मैनेज करना

प्लैटफ़ॉर्म चुनें: Android iOS JavaScript

खास जानकारी

किसी फ़ीचर लेयर को mousemove और click इवेंट के जवाब में काम करने के लिए सेट अप करें. साथ ही, क्लिक की गई सीमा के बारे में जानकारी दिखाने के लिए, उनका इस्तेमाल करें. यह जानकारी इसमें आईडी, डिसप्ले नेम, और सुविधा का टाइप शामिल होता है. निम्न उदाहरण मैप एडमिनिस्ट्रेटिव एरिया लेवल 2 के लिए सीमाएं हैं और इसमें इवेंट हैंडलिंग कोड शामिल है, जो उपयोगकर्ता इंटरैक्शन के आधार पर शैलियां पॉलीगॉन (mousemove बॉर्डर को बदलता है मोटाई, click बैकग्राउंड का रंग शेड करता है और जानकारी विंडो को डिसप्ले).

फ़ीचर लेयर इवेंट चालू करें

किसी फीचर लेयर पर इवेंट चालू करने के लिए, यह तरीका अपनाएं:

  1. इवेंट नोटिफ़िकेशन के लिए एक सुविधा परत पंजीकृत करें हर उस इवेंट के लिए फ़ीचर लेयर पर addListener() फ़ंक्शन जोड़ें जिसे आपको इस्तेमाल करना है रजिस्टर करें. इस उदाहरण में, मैप को भी एक दर्शक मिलता है.

    TypeScript

    // Add the feature layer.
    //@ts-ignore
    featureLayer = map.getFeatureLayer('ADMINISTRATIVE_AREA_LEVEL_2');
    
    // Add the event listeners for the feature layer.
    featureLayer.addListener('click', handleClick);
    featureLayer.addListener('mousemove', handleMouseMove);
    
    // Map event listener.
    map.addListener('mousemove', () => {
      // If the map gets a mousemove, that means there are no feature layers
      // with listeners registered under the mouse, so we clear the last
      // interacted feature ids.
      if (lastInteractedFeatureIds?.length) {
        lastInteractedFeatureIds = [];
        featureLayer.style = applyStyle;
      }
    });

    JavaScript

    // Add the feature layer.
    //@ts-ignore
    featureLayer = map.getFeatureLayer("ADMINISTRATIVE_AREA_LEVEL_2");
    // Add the event listeners for the feature layer.
    featureLayer.addListener("click", handleClick);
    featureLayer.addListener("mousemove", handleMouseMove);
    // Map event listener.
    map.addListener("mousemove", () => {
      // If the map gets a mousemove, that means there are no feature layers
      // with listeners registered under the mouse, so we clear the last
      // interacted feature ids.
      if (lastInteractedFeatureIds?.length) {
        lastInteractedFeatureIds = [];
        featureLayer.style = applyStyle;
      }
    });

  2. चुने गए पॉलीगॉन को स्टाइल देने के लिए, इवेंट हैंडलर कोड जोड़ें इंटरैक्शन.

    TypeScript

    function handleClick(/* MouseEvent */ e) {
      lastClickedFeatureIds = e.features.map(f => f.placeId);
      lastInteractedFeatureIds = [];
      featureLayer.style = applyStyle;
      createInfoWindow(e);
    }
    
    function handleMouseMove(/* MouseEvent */ e) {
      lastInteractedFeatureIds = e.features.map(f => f.placeId);
      featureLayer.style = applyStyle;
    }

    JavaScript

    function handleClick(/* MouseEvent */ e) {
      lastClickedFeatureIds = e.features.map((f) => f.placeId);
      lastInteractedFeatureIds = [];
      featureLayer.style = applyStyle;
      createInfoWindow(e);
    }
    
    function handleMouseMove(/* MouseEvent */ e) {
      lastInteractedFeatureIds = e.features.map((f) => f.placeId);
      featureLayer.style = applyStyle;
    }
    

  3. स्टाइल लागू करने के लिए, फ़ीचर स्टाइल फ़ंक्शन का इस्तेमाल करें. फ़ीचर स्टाइल फ़ंक्शन यहां दिखाई गई स्टाइल, इंटरैक्शन के टाइप के आधार पर शर्तों के साथ लागू होती है. तीन बार स्टाइल के बारे में यहां बताया गया है: पहला, mousemove पर बॉर्डर को बोल्ड करने के लिए, दूसरे को बोल्ड करने के लिए बैकग्राउंड बदलें और click पर जानकारी विंडो और डिफ़ॉल्ट स्टाइल दिखाएं.

    TypeScript

    // Define styles.
    // Stroke and fill with minimum opacity value.
    const styleDefault = {
      strokeColor: '#810FCB',
      strokeOpacity: 1.0,
      strokeWeight: 2.0,
      fillColor: 'white',
      fillOpacity: 0.1,  // Polygons must be visible to receive events.
    };
    // Style for the clicked polygon.
    const styleClicked = {
      ...styleDefault,
      fillColor: '#810FCB',
      fillOpacity: 0.5,
    };
    // Style for polygon on mouse move.
    const styleMouseMove = {
      ...styleDefault,
      strokeWeight: 4.0,
    };
    
    // Apply styles using a feature style function.
    function applyStyle(/* FeatureStyleFunctionOptions */ params) {
      const placeId = params.feature.placeId;
      //@ts-ignore
      if (lastClickedFeatureIds.includes(placeId)) {
        return styleClicked;
      }
      //@ts-ignore
      if (lastInteractedFeatureIds.includes(placeId)) {
        return styleMouseMove;
      }
      return styleDefault;
    }

    JavaScript

    // Define styles.
    // Stroke and fill with minimum opacity value.
    const styleDefault = {
      strokeColor: "#810FCB",
      strokeOpacity: 1.0,
      strokeWeight: 2.0,
      fillColor: "white",
      fillOpacity: 0.1, // Polygons must be visible to receive events.
    };
    // Style for the clicked polygon.
    const styleClicked = {
      ...styleDefault,
      fillColor: "#810FCB",
      fillOpacity: 0.5,
    };
    // Style for polygon on mouse move.
    const styleMouseMove = {
      ...styleDefault,
      strokeWeight: 4.0,
    };
    
    // Apply styles using a feature style function.
    function applyStyle(/* FeatureStyleFunctionOptions */ params) {
      const placeId = params.feature.placeId;
    
      //@ts-ignore
      if (lastClickedFeatureIds.includes(placeId)) {
        return styleClicked;
      }
    
      //@ts-ignore
      if (lastInteractedFeatureIds.includes(placeId)) {
        return styleMouseMove;
      }
      return styleDefault;
    }
    

पूरा कोड का उदाहरण

TypeScript

let map: google.maps.Map;
let featureLayer;
let infoWindow;
let lastInteractedFeatureIds = [];
let lastClickedFeatureIds = [];

function handleClick(/* MouseEvent */ e) {
  lastClickedFeatureIds = e.features.map(f => f.placeId);
  lastInteractedFeatureIds = [];
  featureLayer.style = applyStyle;
  createInfoWindow(e);
}

function handleMouseMove(/* MouseEvent */ e) {
  lastInteractedFeatureIds = e.features.map(f => f.placeId);
  featureLayer.style = applyStyle;
}

async function initMap() {
  // Request needed libraries.
  const { Map, InfoWindow } = await google.maps.importLibrary('maps') as google.maps.MapsLibrary;

  map = new Map(document.getElementById('map') as HTMLElement, {
    center: {lat: 39.23, lng: -105.73},
    zoom: 8,
    // In the cloud console, configure your Map ID with a style that enables the
    // 'Administrative Area Level 2' Data Driven Styling type.
    mapId: 'a3efe1c035bad51b', // Substitute your own map ID.
    mapTypeControl: false,
  });

  // Add the feature layer.
  //@ts-ignore
  featureLayer = map.getFeatureLayer('ADMINISTRATIVE_AREA_LEVEL_2');

  // Add the event listeners for the feature layer.
  featureLayer.addListener('click', handleClick);
  featureLayer.addListener('mousemove', handleMouseMove);

  // Map event listener.
  map.addListener('mousemove', () => {
    // If the map gets a mousemove, that means there are no feature layers
    // with listeners registered under the mouse, so we clear the last
    // interacted feature ids.
    if (lastInteractedFeatureIds?.length) {
      lastInteractedFeatureIds = [];
      featureLayer.style = applyStyle;
    }
  });

  // Create the infowindow.
  infoWindow = new InfoWindow({});
  // Apply style on load, to enable clicking.
  featureLayer.style = applyStyle;
}

// Helper function for the infowindow.
async function createInfoWindow(event) {
  let feature = event.features[0];
  if (!feature.placeId) return;

  // Update the infowindow.
  const place = await feature.fetchPlace();
  let content =
      '<span style="font-size:small">Display name: ' + place.displayName +
      '<br/> Place ID: ' + feature.placeId +
      '<br/> Feature type: ' + feature.featureType + '</span>';

  updateInfoWindow(content, event.latLng);
}

// Define styles.
// Stroke and fill with minimum opacity value.
const styleDefault = {
  strokeColor: '#810FCB',
  strokeOpacity: 1.0,
  strokeWeight: 2.0,
  fillColor: 'white',
  fillOpacity: 0.1,  // Polygons must be visible to receive events.
};
// Style for the clicked polygon.
const styleClicked = {
  ...styleDefault,
  fillColor: '#810FCB',
  fillOpacity: 0.5,
};
// Style for polygon on mouse move.
const styleMouseMove = {
  ...styleDefault,
  strokeWeight: 4.0,
};

// Apply styles using a feature style function.
function applyStyle(/* FeatureStyleFunctionOptions */ params) {
  const placeId = params.feature.placeId;
  //@ts-ignore
  if (lastClickedFeatureIds.includes(placeId)) {
    return styleClicked;
  }
  //@ts-ignore
  if (lastInteractedFeatureIds.includes(placeId)) {
    return styleMouseMove;
  }
  return styleDefault;
}

// Helper function to create an info window.
function updateInfoWindow(content, center) {
  infoWindow.setContent(content);
  infoWindow.setPosition(center);
  infoWindow.open({
    map,
    shouldFocus: false,
  });
}

initMap();

JavaScript

let map;
let featureLayer;
let infoWindow;
let lastInteractedFeatureIds = [];
let lastClickedFeatureIds = [];

function handleClick(/* MouseEvent */ e) {
  lastClickedFeatureIds = e.features.map((f) => f.placeId);
  lastInteractedFeatureIds = [];
  featureLayer.style = applyStyle;
  createInfoWindow(e);
}

function handleMouseMove(/* MouseEvent */ e) {
  lastInteractedFeatureIds = e.features.map((f) => f.placeId);
  featureLayer.style = applyStyle;
}

async function initMap() {
  // Request needed libraries.
  const { Map, InfoWindow } = await google.maps.importLibrary("maps");

  map = new Map(document.getElementById("map"), {
    center: { lat: 39.23, lng: -105.73 },
    zoom: 8,
    // In the cloud console, configure your Map ID with a style that enables the
    // 'Administrative Area Level 2' Data Driven Styling type.
    mapId: "a3efe1c035bad51b", // Substitute your own map ID.
    mapTypeControl: false,
  });
  // Add the feature layer.
  //@ts-ignore
  featureLayer = map.getFeatureLayer("ADMINISTRATIVE_AREA_LEVEL_2");
  // Add the event listeners for the feature layer.
  featureLayer.addListener("click", handleClick);
  featureLayer.addListener("mousemove", handleMouseMove);
  // Map event listener.
  map.addListener("mousemove", () => {
    // If the map gets a mousemove, that means there are no feature layers
    // with listeners registered under the mouse, so we clear the last
    // interacted feature ids.
    if (lastInteractedFeatureIds?.length) {
      lastInteractedFeatureIds = [];
      featureLayer.style = applyStyle;
    }
  });
  // Create the infowindow.
  infoWindow = new InfoWindow({});
  // Apply style on load, to enable clicking.
  featureLayer.style = applyStyle;
}

// Helper function for the infowindow.
async function createInfoWindow(event) {
  let feature = event.features[0];

  if (!feature.placeId) return;

  // Update the infowindow.
  const place = await feature.fetchPlace();
  let content =
    '<span style="font-size:small">Display name: ' +
    place.displayName +
    "<br/> Place ID: " +
    feature.placeId +
    "<br/> Feature type: " +
    feature.featureType +
    "</span>";

  updateInfoWindow(content, event.latLng);
}

// Define styles.
// Stroke and fill with minimum opacity value.
const styleDefault = {
  strokeColor: "#810FCB",
  strokeOpacity: 1.0,
  strokeWeight: 2.0,
  fillColor: "white",
  fillOpacity: 0.1, // Polygons must be visible to receive events.
};
// Style for the clicked polygon.
const styleClicked = {
  ...styleDefault,
  fillColor: "#810FCB",
  fillOpacity: 0.5,
};
// Style for polygon on mouse move.
const styleMouseMove = {
  ...styleDefault,
  strokeWeight: 4.0,
};

// Apply styles using a feature style function.
function applyStyle(/* FeatureStyleFunctionOptions */ params) {
  const placeId = params.feature.placeId;

  //@ts-ignore
  if (lastClickedFeatureIds.includes(placeId)) {
    return styleClicked;
  }

  //@ts-ignore
  if (lastInteractedFeatureIds.includes(placeId)) {
    return styleMouseMove;
  }
  return styleDefault;
}

// Helper function to create an info window.
function updateInfoWindow(content, center) {
  infoWindow.setContent(content);
  infoWindow.setPosition(center);
  infoWindow.open({
    map,
    shouldFocus: false,
  });
}

initMap();

सीएसएस

/* 
 * Always set the map height explicitly to define the size of the div element
 * that contains the map. 
 */
#map {
  height: 100%;
}

/* 
 * Optional: Makes the sample page fill the window. 
 */
html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
}

एचटीएमएल

<html>
  <head>
    <title>Handle Region Boundary Click Event</title>

    <link rel="stylesheet" type="text/css" href="./style.css" />
    <script type="module" src="./index.js"></script>
  </head>
  <body>
    <div id="map"></div>

    <!-- prettier-ignore -->
    <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: "AIzaSyB41DRUbKWJHPxaFjMAwdrzWzbVKartNGg", v: "weekly"});</script>
  </body>
</html>

सैंपल आज़माएं

इवेंट के बारे में ज़्यादा जानें