La classe DrawingManager fornisce un'interfaccia grafica per consentire agli utenti di disegnare poligoni, rettangoli, polilinee, cerchi e indicatori sulla mappa.
Utilizzo della libreria
Gli strumenti di disegno sono una libreria autonoma, separata dal codice JavaScript dell'API Maps principale. Per utilizzare le funzionalità contenute in questa libreria, devi prima caricarla utilizzando il parametro libraries nell'URL di bootstrap dell'API Maps:
Il costruttore DrawingManager accetta un insieme di opzioni che definiscono l'insieme di controlli da visualizzare, la posizione del controllo e lo stato iniziale del disegno.
La proprietà drawingMode di DrawingManager definisce lo stato iniziale del disegno di DrawingManager. Accetta una costante google.maps.drawing.OverlayType. Il valore predefinito è null, nel qual caso il cursore è in modalità di disegno quando viene inizializzato DrawingManager.
La proprietà drawingControl di DrawingManager definisce la visibilità dell'interfaccia di selezione degli strumenti di disegno sulla mappa. Accetta un valore booleano.
Puoi anche definire la posizione del controllo e i tipi di overlay da rappresentare nel controllo utilizzando la proprietà drawingControlOptions di DrawingManager.
position definisce la posizione del controllo di disegno sulla mappa e accetta una costante google.maps.ControlPosition.
drawingModes è un array di costanti google.maps.drawing.OverlayType e definisce i tipi di overlay da includere nel selettore di forme del controllo di disegno. L'icona a forma di mano sarà sempre presente, consentendo all'utente di interagire con la mappa senza disegnare. L'ordine degli strumenti nel controllo corrisponderà all'ordine in cui sono dichiarati nell'array.
A ogni tipo di overlay è possibile assegnare un insieme di proprietà predefinite che definiscono l'aspetto dell'overlay al momento della creazione. Questi valori sono definiti nella proprietà {overlay}Options dell'overlay (dove {overlay} rappresenta il tipo di overlay). Ad esempio, le proprietà di riempimento, di tratto, z-index e la cliccabilità di un cerchio possono essere definite con la proprietà circleOptions. Se vengono passati valori di dimensioni, posizione o mappa, questi vengono ignorati. Per informazioni dettagliate sulle proprietà che possono essere impostate, consulta la documentazione di riferimento dell'API.
Nota: per rendere una forma modificabile dall'utente dopo la sua creazione, imposta la proprietà editable su true.
TypeScript
// This example requires the Drawing library. Include the libraries=drawing// parameter when you first load the API. For example:// <script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&libraries=drawing">functioninitMap():void{constmap=newgoogle.maps.Map(document.getElementById("map")asHTMLElement,{center:{lat:-34.397,lng:150.644},zoom:8,});constdrawingManager=newgoogle.maps.drawing.DrawingManager({drawingMode:google.maps.drawing.OverlayType.MARKER,drawingControl:true,drawingControlOptions:{position:google.maps.ControlPosition.TOP_CENTER,drawingModes:[google.maps.drawing.OverlayType.MARKER,google.maps.drawing.OverlayType.CIRCLE,google.maps.drawing.OverlayType.POLYGON,google.maps.drawing.OverlayType.POLYLINE,google.maps.drawing.OverlayType.RECTANGLE,],},markerOptions:{icon:"https://developers.google.com/maps/documentation/javascript/examples/full/images/beachflag.png",},circleOptions:{fillColor:"#ffff00",fillOpacity:1,strokeWeight:5,clickable:false,editable:true,zIndex:1,},});drawingManager.setMap(map);}declareglobal{interfaceWindow{initMap:()=>void;}}window.initMap=initMap;
// This example requires the Drawing library. Include the libraries=drawing// parameter when you first load the API. For example:// <script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&libraries=drawing">functioninitMap(){constmap=newgoogle.maps.Map(document.getElementById("map"),{center:{lat:-34.397,lng:150.644},zoom:8,});constdrawingManager=newgoogle.maps.drawing.DrawingManager({drawingMode:google.maps.drawing.OverlayType.MARKER,drawingControl:true,drawingControlOptions:{position:google.maps.ControlPosition.TOP_CENTER,drawingModes:[google.maps.drawing.OverlayType.MARKER,google.maps.drawing.OverlayType.CIRCLE,google.maps.drawing.OverlayType.POLYGON,google.maps.drawing.OverlayType.POLYLINE,google.maps.drawing.OverlayType.RECTANGLE,],},markerOptions:{icon:"https://developers.google.com/maps/documentation/javascript/examples/full/images/beachflag.png",},circleOptions:{fillColor:"#ffff00",fillOpacity:1,strokeWeight:5,clickable:false,editable:true,zIndex:1,},});drawingManager.setMap(map);}window.initMap=initMap;
Per nascondere o mostrare il controllo degli strumenti di disegno:
// To hide:drawingManager.setOptions({drawingControl:false});// To show:drawingManager.setOptions({drawingControl:true});
Per rimuovere il controllo degli strumenti di disegno dall'oggetto map:
drawingManager.setMap(null);
Se nascondi il controllo di disegno, il controllo degli strumenti di disegno non viene visualizzato, ma tutte le funzionalità della classe DrawingManager sono comunque disponibili. In questo modo, se vuoi, puoi implementare il tuo controllo. La rimozione di DrawingManager dall'oggetto map disattiva tutte le funzionalità di disegno. Per ripristinare le funzionalità di disegno, DrawingManager deve essere ricollegato alla mappa con drawingManager.setMap(map) o deve essere creato un nuovo oggetto DrawingManager.
Eventi di disegno
Quando viene creato un overlay di forma, vengono attivati due eventi:
Un evento {overlay}complete (dove {overlay} rappresenta il tipo di overlay, ad esempio circlecomplete, polygoncomplete e così via). Un riferimento all'overlay viene passato come argomento.
Un evento overlaycomplete. Un valore letterale dell'oggetto, contenente OverlayType e un riferimento all'overlay, viene passato come argomento.
[[["Facile da capire","easyToUnderstand","thumb-up"],["Il problema è stato risolto","solvedMyProblem","thumb-up"],["Altra","otherUp","thumb-up"]],[["Mancano le informazioni di cui ho bisogno","missingTheInformationINeed","thumb-down"],["Troppo complicato/troppi passaggi","tooComplicatedTooManySteps","thumb-down"],["Obsoleti","outOfDate","thumb-down"],["Problema di traduzione","translationIssue","thumb-down"],["Problema relativo a esempi/codice","samplesCodeIssue","thumb-down"],["Altra","otherDown","thumb-down"]],["Ultimo aggiornamento 2025-08-06 UTC."],[[["\u003cp\u003eThe \u003ccode\u003eDrawingManager\u003c/code\u003e class in the Google Maps JavaScript API enables users to draw shapes like polygons, circles, and markers directly on the map.\u003c/p\u003e\n"],["\u003cp\u003eTo utilize the Drawing Tools, include the \u003ccode\u003elibraries=drawing\u003c/code\u003e parameter in the Maps API bootstrap URL when loading the API.\u003c/p\u003e\n"],["\u003cp\u003eCustomize the drawing experience by configuring options like \u003ccode\u003edrawingMode\u003c/code\u003e, \u003ccode\u003edrawingControl\u003c/code\u003e, and shape-specific properties using the \u003ccode\u003eDrawingManager\u003c/code\u003e constructor and \u003ccode\u003esetOptions()\u003c/code\u003e method.\u003c/p\u003e\n"],["\u003cp\u003eDrawing events such as \u003ccode\u003e{overlay}complete\u003c/code\u003e and \u003ccode\u003eoverlaycomplete\u003c/code\u003e are triggered when shapes are created, providing access to the drawn overlay for further manipulation.\u003c/p\u003e\n"],["\u003cp\u003eWhile drawing is active, standard Google Maps events like \u003ccode\u003eclick\u003c/code\u003e and \u003ccode\u003emousemove\u003c/code\u003e are temporarily disabled on the map.\u003c/p\u003e\n"]]],[],null,["1. [Overview](#overview)\n2. [Using the Library](#using_the_library)\n3. [DrawingManager Options](#drawingmanager_options)\n4. [Updating the Drawing Tools Control](#updating_the_drawing_tools_control)\n5. [Drawing Events](#drawing_events)\n\nOverview\n\nThe `DrawingManager` class provides a graphical interface for users to draw\npolygons, rectangles, polylines, circles, and markers on the map.\n\nUsing the Library\n\nThe Drawing Tools are a self-contained library, separate from the main Maps\nAPI JavaScript code. To use the functionality contained within this library,\nyou must first load it using the [`libraries`](/maps/documentation/javascript/libraries) parameter in the\nMaps API bootstrap URL: \n\n```html\n\u003cscript async\n src=\"https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&loading=async&libraries=drawing&callback=initMap\"\u003e\n\u003c/script\u003e\n```\n\nOnce you've added the libraries parameter, you can create a `DrawingManager`\nobject as follows: \n\n```javascript\nvar drawingManager = new google.maps.drawing.DrawingManager();\ndrawingManager.setMap(map);\n```\n\nDrawingManager Options\n\nThe `DrawingManager` constructor takes a set of options that define the set of\ncontrols to display, the position of the control, and the initial drawing\nstate.\n\n- The `drawingMode` property of the `DrawingManager` defines the initial drawing state of the DrawingManager. It accepts a [`google.maps.drawing.OverlayType`](/maps/documentation/javascript/reference#OverlayType) constant. Default is `null`, in which case the cursor is in a non-drawing mode when the DrawingManager is initialized.\n- The `drawingControl` property of the `DrawingManager` defines the visibility of the drawing tools selection interface on the map. It accepts a boolean value.\n- You can also define the position of the control, and the types of overlays that should be represented in the control, using the `drawingControlOptions` property of the `DrawingManager`.\n - `position` defines the position of the drawing control on the map, and accepts a [`google.maps.ControlPosition`](/maps/documentation/javascript/reference#ControlPosition) constant.\n - `drawingModes` is an array of [`google.maps.drawing.OverlayType`](/maps/documentation/javascript/reference#OverlayType) constants, and defines the overlay types to include in the drawing control shape picker. The hand icon will always be present, allowing the user to interact with the map without drawing. The order of the tools in the control will match the order in which they are declared in the array.\n- Each type of overlay can be assigned a set of default properties, that define the appearance of the overlay when first created. These are defined in that overlay's `{overlay}Options` property (where `{overlay}` represents the overlay type). For example, a circle's fill properties, stroke properties, zIndex, and clickability can be defined with the `circleOptions` property. If any size, location, or map values are passed, they are ignored. For full details of which properties can be set, refer to the [API Reference documentation](/maps/documentation/javascript/reference#DrawingManagerOptions).\n\n**Note:** To make a shape [user-editable](/maps/documentation/javascript/shapes#editable) after it has\nbeen created, set its `editable` property to `true`. \n\nTypeScript \n\n```typescript\n// This example requires the Drawing library. Include the libraries=drawing\n// parameter when you first load the API. For example:\n// \u003cscript src=\"https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&libraries=drawing\"\u003e\n\nfunction initMap(): void {\n const map = new google.maps.Map(\n document.getElementById(\"map\") as HTMLElement,\n {\n center: { lat: -34.397, lng: 150.644 },\n zoom: 8,\n }\n );\n\n const drawingManager = new google.maps.drawing.DrawingManager({\n drawingMode: google.maps.drawing.OverlayType.MARKER,\n drawingControl: true,\n drawingControlOptions: {\n position: google.maps.ControlPosition.TOP_CENTER,\n drawingModes: [\n google.maps.drawing.OverlayType.MARKER,\n google.maps.drawing.OverlayType.CIRCLE,\n google.maps.drawing.OverlayType.POLYGON,\n google.maps.drawing.OverlayType.POLYLINE,\n google.maps.drawing.OverlayType.RECTANGLE,\n ],\n },\n markerOptions: {\n icon: \"https://developers.google.com/maps/documentation/javascript/examples/full/images/beachflag.png\",\n },\n circleOptions: {\n fillColor: \"#ffff00\",\n fillOpacity: 1,\n strokeWeight: 5,\n clickable: false,\n editable: true,\n zIndex: 1,\n },\n });\n\n drawingManager.setMap(map);\n}\n\ndeclare global {\n interface Window {\n initMap: () =\u003e void;\n }\n}\nwindow.initMap = initMap;https://github.com/googlemaps/js-samples/blob/2683f7366fb27829401945d2a7e27d77ed2df8e5/samples/drawing-tools/index.ts#L8-L55\n```\n| **Note:** Read the [guide](/maps/documentation/javascript/using-typescript) on using TypeScript and Google Maps.\n\nJavaScript \n\n```javascript\n// This example requires the Drawing library. Include the libraries=drawing\n// parameter when you first load the API. For example:\n// \u003cscript src=\"https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&libraries=drawing\"\u003e\nfunction initMap() {\n const map = new google.maps.Map(document.getElementById(\"map\"), {\n center: { lat: -34.397, lng: 150.644 },\n zoom: 8,\n });\n const drawingManager = new google.maps.drawing.DrawingManager({\n drawingMode: google.maps.drawing.OverlayType.MARKER,\n drawingControl: true,\n drawingControlOptions: {\n position: google.maps.ControlPosition.TOP_CENTER,\n drawingModes: [\n google.maps.drawing.OverlayType.MARKER,\n google.maps.drawing.OverlayType.CIRCLE,\n google.maps.drawing.OverlayType.POLYGON,\n google.maps.drawing.OverlayType.POLYLINE,\n google.maps.drawing.OverlayType.RECTANGLE,\n ],\n },\n markerOptions: {\n icon: \"https://developers.google.com/maps/documentation/javascript/examples/full/images/beachflag.png\",\n },\n circleOptions: {\n fillColor: \"#ffff00\",\n fillOpacity: 1,\n strokeWeight: 5,\n clickable: false,\n editable: true,\n zIndex: 1,\n },\n });\n\n drawingManager.setMap(map);\n}\n\nwindow.initMap = initMap;https://github.com/googlemaps/js-samples/blob/2683f7366fb27829401945d2a7e27d77ed2df8e5/dist/samples/drawing-tools/docs/index.js#L7-L44\n```\n| **Note:** The JavaScript is compiled from the TypeScript snippet.\n[View example](/maps/documentation/javascript/examples/drawing-tools)\n\nTry Sample \n[JSFiddle.net](https://jsfiddle.net/gh/get/library/pure/googlemaps/js-samples/tree/master/dist/samples/drawing-tools/jsfiddle) [Google Cloud Shell](https://ssh.cloud.google.com/cloudshell/editor?cloudshell_git_repo=https%3A%2F%2Fgithub.com%2Fgooglemaps%2Fjs-samples&cloudshell_git_branch=sample-drawing-tools&cloudshell_tutorial=cloud_shell_instructions.md&cloudshell_workspace=.)\n\nUpdating the Drawing Tools Control\n\nOnce the `DrawingManager` object has been created, you can update it by\ncalling `setOptions()` and passing new values. \n\n```javascript\ndrawingManager.setOptions({\n drawingControlOptions: {\n position: google.maps.ControlPosition.BOTTOM_LEFT,\n drawingModes: ['marker']\n }\n});\n```\n\nTo hide or show the drawing tools control: \n\n```javascript\n// To hide:\ndrawingManager.setOptions({\n drawingControl: false\n});\n\n// To show:\ndrawingManager.setOptions({\n drawingControl: true\n});\n```\n\nTo remove the drawing tools control from the `map` object: \n\n```javascript\ndrawingManager.setMap(null);\n```\n\n*Hiding* the drawing control causes the drawing tools control to not display,\nbut all of the functionality of the `DrawingManager` class is still available.\nIn this way, you can implement your own control, if desired. *Removing* the\n`DrawingManager` from the `map` object disables all drawing functionality; it\nmust be reattached to the map with `drawingManager.setMap(map)`, or a new\n`DrawingManager` object constructed, if drawing features are to be restored.\n\nDrawing Events\n\nWhen a shape overlay is created, two events are fired:\n\n- An `{overlay}complete` event (where `{overlay}` represents the overlay type, such as `circlecomplete`, `polygoncomplete`, etc). A reference to the overlay is passed as an argument.\n- An `overlaycomplete` event. An object literal, containing the `OverlayType` and a reference to the overlay, is passed as an argument.\n\n```javascript\ngoogle.maps.event.addListener(drawingManager, 'circlecomplete', function(circle) {\n var radius = circle.getRadius();\n});\n\ngoogle.maps.event.addListener(drawingManager, 'overlaycomplete', function(event) {\n if (event.type == 'circle') {\n var radius = event.overlay.getRadius();\n }\n});\n```\n\nNote that [`google.maps.Map`](/maps/documentation/javascript/reference#Map)\nevents, such as `click` and `mousemove` are disabled while drawing on the map."]]
