ওভারভিউ
একটি বৈশিষ্ট্য স্তর তৈরি করুন mousemove
এবং click
ইভেন্টের প্রতিক্রিয়া, এবং ক্লিক করা সীমানা সম্পর্কে তথ্য ফেরত দিতে তাদের ব্যবহার করুন। এই তথ্যের মধ্যে আইডি, প্রদর্শনের নাম এবং বৈশিষ্ট্যের ধরন রয়েছে। নিম্নলিখিত উদাহরণ মানচিত্রটি প্রশাসনিক এলাকা স্তর 2-এর সীমানা দেখায় এবং এতে ইভেন্ট হ্যান্ডলিং কোড রয়েছে যা ব্যবহারকারীর ইন্টারঅ্যাকশনের উপর ভিত্তি করে বহুভুজকে স্টাইল করে ( mousemove
বর্ডার বেধ পরিবর্তন করে, পটভূমির রঙকে ছায়া click
এবং একটি তথ্য উইন্ডো প্রদর্শন করে)।
বৈশিষ্ট্য স্তর ইভেন্ট সক্রিয় করুন
একটি বৈশিষ্ট্য স্তরে ইভেন্টগুলি সক্ষম করতে নিম্নলিখিত পদক্ষেপগুলি নিন:
আপনি নিবন্ধন করতে চান এমন প্রতিটি ইভেন্টের জন্য বৈশিষ্ট্য স্তরের
addListener()
ফাংশনে কল করে ইভেন্ট বিজ্ঞপ্তিগুলির জন্য একটি বৈশিষ্ট্য স্তর নিবন্ধন করুন৷ এই উদাহরণে মানচিত্রটিও একজন শ্রোতা পায়।টাইপস্ক্রিপ্ট
// 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; } });
জাভাস্ক্রিপ্ট
// 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; } });
মিথস্ক্রিয়া ধরনের উপর ভিত্তি করে নির্বাচিত বহুভুজ শৈলী করতে ইভেন্ট হ্যান্ডলার কোড যোগ করুন।
টাইপস্ক্রিপ্ট
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; }
জাভাস্ক্রিপ্ট
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; }
শৈলী প্রয়োগ করতে একটি বৈশিষ্ট্য শৈলী ফাংশন ব্যবহার করুন। এখানে দেখানো বৈশিষ্ট্য শৈলী ফাংশন শর্তসাপেক্ষে মিথস্ক্রিয়া ধরনের উপর ভিত্তি করে শৈলী প্রযোজ্য. তিনটি শৈলী এখানে সংজ্ঞায়িত করা হয়েছে: একটি
mousemove
এ বর্ডার বোল্ড করার জন্য, একটি ব্যাকগ্রাউন্ড পরিবর্তন করতে এবংclick
এ একটি তথ্য উইন্ডো দেখাতে এবং একটি ডিফল্ট শৈলী।টাইপস্ক্রিপ্ট
// 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; }
জাভাস্ক্রিপ্ট
// 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; }
সম্পূর্ণ উদাহরণ কোড
টাইপস্ক্রিপ্ট
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();
জাভাস্ক্রিপ্ট
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();
সিএসএস
/* * 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; }
এইচটিএমএল
<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>