Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Showing content from https://developers.arcgis.com/javascript/latest/sample-code/portalitem-dragndrop/ below:

Load portal items via drag & drop | Sample Code | ArcGIS Maps SDK for JavaScript 4.33

This sample demonstrates how to load a PortalItem from a Portal for ArcGIS item into your application.

You'll want to define a template to use for each PortalItem to display in the application.

Use dark colors for code blocks Copy

1
2
3
4
5
6
7
8
9
10
11
12
13
14
const template =
  '<div data-itemid="{id}" class="card block" draggable="true">' +
  '<figure class="card-image-wrap"><img class="card-image" src="{thumbnailUrl}" alt="Card Thumbnail">' +
  '<figcaption class="card-image-caption">{title}</figcaption>' +
  "</figure>" +
  '<div class="card-content">' +
  "<ul>" +
  "<li>Published Date:</li>" +
  "{created}" +
  "<li>Owner:</li>" +
  "{owner}" +
  "</ul>" +
  "</div>" +
  "</div>";

Create an array of all the Portal items to use in this application. We want to load the Portal items when they are created, because we want to use the information such as id, owner, etc. to display in the application.

Use dark colors for code blocks Copy

1
2
3
4
5
const portalItems = layerItems.map((itemid) => {
  return new PortalItem({
    id: itemid,
  }).load();
});

Use the eachAlways method of esri/core/promiseUtils to wait for the Portal items to finish loading. You can then use the esri/intl.substitute() method to create DOM elements using the details of each Portal item to display on the page. Also, you will need to listen for DOM element's dragStart event and assign some data to be transferred to wherever that element is dropped.

Use dark colors for code blocks Copy

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
promiseUtils.eachAlways(portalItems).then((items) => {
  const docFrag = document.createDocumentFragment();
  items.map((result) => {
    const item = result.value;
    const card = intl.substitute(template, item);
    const elem = document.createElement("div");
    elem.innerHTML = card;
    // This is a technique to turn a DOM string to a DOM element.
    const target = elem.firstChild;
    docFrag.appendChild(target);
    target.addEventListener("dragstart", (event) => {
      const id = event.currentTarget.getAttribute("data-itemid");
      event.dataTransfer.setData("text", id);
    });
  });
  document.querySelector(".cards-list").appendChild(docFrag);
  ...
});

Listen for the drop and dragover events to properly drop the Portal item on the MapView. You can then get the id of the PortalItem and add the layer to the WebMap using Layer.fromPortalItem.

Use dark colors for code blocks Copy

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
promiseUtils.eachAlways(portalItems).then((items) => {
  ...
  view.container.addEventListener("dragover", (event) => {
    event.preventDefault();
    event.dataTransfer.dropEffect = "copy";
  })
  view.container.addEventListener("drop", (event) => {
    const id = event.dataTransfer.getData("text");
    // Get the first item that matches
    const resultItem = items.find((x) => { return x.id === id; });
    const item = result.value;
    if (item && item.isLayer) {
      Layer.fromPortalItem({
        portalItem: item
      }).then((layer) => {
        webmap.add(layer);
        view.extent = item.extent;
      });
    }
  })
});

Please refer to the ArcGIS Organization portals for information on how the ArcGIS Maps SDK for JavaScript makes use of working with portal items.

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4