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Analysis
Data Reviewer
Dynamic Layers
Editing
Feature Layers
Feature Table
Graphics
Map
Mobile
Online and Portal
Popups and Info Windows
Query and Select
Renderers, Symbols, Visualization
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Editor with undo redo
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Description
This sample shows how to use the UndoManager, a utility object, that allows you to incoporate undo/redo functionality into your application. When you create the UndoManager you can specify the number of operations that will be maintained on the undo/redo stack.
undoManager = new UndoManager({maxOperations: 8});
There are several out-of-the-box operations: Add, Delete, Update, Cut and Union. You can also create custom operations by inheriting from the OperationBase class. In this sample we use the Add, Delete and Update operations to maintain a stack of feature edits. This code snippet shows how to add a new operation to the stack. When existing features are updated using the applyEdits method add the update to the stack.
layer.applyEdits(null, [feature], null, function() {var operation = new Update({
featureLayer: layer,
preUpdatedGraphics: [new Graphic(originalFeature)],
postUpdatedGraphics: [feature]
});undoManager.add(operation);
checkUI();
});
});
If the application end-user wants to undo the update they click the undo button which calls the UndoManager's undo method.
registry.byId("undo").on("click", function(e) {
undoManager.undo();
});
<button id="undo" data-dojo-type="dijit/form/Button" data-dojo-props="disabled:true, iconClass:'undoIcon'" >Undo</button>
Code
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no">
<title>UndoManager</title>
<link rel="stylesheet" href="https://js.arcgis.com/3.29/dijit/themes/claro/claro.css">
<link rel="stylesheet" href="https://js.arcgis.com/3.29/esri/css/esri.css">
<style>
html, body {
height: 100%;
width: 100%;
margin: 0;
padding: 0;
overflow:hidden;
}
.instructions{
padding-top:20px;
font-size:12px;
}
.undoButtons{
width:60%;
margin-left:auto;
margin-right:auto;
padding-top:4px;
}
#map{
padding:0px;
border:solid 2px #1A84AD;
-moz-border-radius: 4px;
border-radius: 4px;
}
#rightPane{
border:none;
width:300px;
}
.templatePicker {
border:solid 2px #1A84AD !important;
}
.undoIcon { background-image:url(images/undo.png); width:16px; height:16px; }
.redoIcon { background-image:url(images/redo.png); width:16px; height:16px;}
</style>
<script src="https://js.arcgis.com/3.29/"></script>
<script>
var map, undoManager, attInspector;
require([
"esri/map",
"esri/layers/FeatureLayer",
"esri/undoManager",
"esri/dijit/AttributeInspector",
"esri/dijit/editing/TemplatePicker",
"esri/dijit/editing/Add",
"esri/dijit/editing/Delete",
"esri/dijit/editing/Update",
"esri/dijit/editing/Editor",
"esri/tasks/query",
"esri/toolbars/draw",
"esri/graphic",
"dojo/parser",
"dojo/_base/event",
"dijit/registry",
"dojo/_base/array",
"dijit/form/Button",
"dijit/layout/BorderContainer",
"dijit/layout/ContentPane",
"dojo/domReady!"
], function(
Map, FeatureLayer, UndoManager, AttributeInspector, TemplatePicker,
Add, Delete, Update, Editor, Query, Draw, Graphic,
parser, event, registry, array
) {
parser.parse();
// specify the number of undo operations allowed using the maxOperations parameter
undoManager = new UndoManager({maxOperations: 8});
// listen for the undo/redo button click events
registry.byId("undo").on("click", function(e) {
undoManager.undo();
});
registry.byId("redo").on("click", function(e) {
undoManager.redo();
});
map = new Map("map", {
basemap: "topo",
center: [-97.367, 37.691],
zoom: 14
});
var landuseLayer = new FeatureLayer("https://sampleserver6.arcgisonline.com/arcgis/rest/services/Military/FeatureServer/6", {
mode: FeatureLayer.MODE_SNAPSHOT,
outFields: ["*"]
});
map.addLayers([landuseLayer]);
map.on("layers-add-result", initEditing);
function initEditing(results) {
var layer = results.layers[0].layer;
var layers = array.map(results.layers, function(result) {
return result.layer;
});
var layerInfos = array.map(results.layers, function(result) {
return {featureLayer: results.layers[0].layer, isEditable: true, showAttachments: false};
});
//Ctrl+click to delete features and add this delete operation to undomanager
layer.on("click", function(evt) {
event.stop(evt);
if (evt.ctrlKey === true || evt.metaKey === true) { //delete feature if ctrl key is depressed
layer.applyEdits(null, null, [evt.graphic], function() {
var operation = new Delete({
featureLayer: layer,
deletedGraphics: [evt.graphic]
});
undoManager.add(operation);
checkUI();
});
}
});
layer.on("before-apply-edits", function() {
dijit.byId("undo").set("disabled", true);
dijit.byId("redo").set("disabled", true);
});
layer.on("edits-complete", function(evt) {
//display attribute inspector for newly created features
if (evt.adds.length > 0) {
var query = new Query();
query.objectIds = [evt.adds[0].objectId];
layer.selectFeatures(query, FeatureLayer.SELECTION_NEW, function(features
) {
if (features.length > 0) {
var screenPoint = map.toScreen(features[0].geometry);
//display the attribute window for newly created features
map.infoWindow.setTitle("");
map.infoWindow.show(screenPoint, map.getInfoWindowAnchor(screenPoint));
}
else {
map.infoWindow.hide();
}
});
}
if (evt.deletes.length > 0) {
//hide the info window if features are deleted.
map.infoWindow.hide();
}
checkUI();
});
//Add the attribute inspector and listen for events to update feature layer
//when attributes are modified.
attInspector = new AttributeInspector({layerInfos: layerInfos}, "attributesDiv");
//display the attribute inspector in the info window.
map.infoWindow.setContent(attInspector.domNode);
map.infoWindow.resize(300, 190);
//delete the feature and close the info window if displayed.
attInspector.on("delete",function(evt){
var feature = evt.feature;
var layer = feature.getLayer();
layer.applyEdits(null, null, [feature], function() {
var operation = new Delete({
featureLayer: layer,
deletedGraphics: [feature]
});
undoManager.add(operation);
checkUI();
});
layer.clearSelection();
map.infoWindow.hide();
});
//show the info window for the next selected feature
attInspector.on("next", function(evt) {
var feature = evt.feature;
var screenPoint = map.toScreen(feature.geometry.getExtent().getCenter());
map.infoWindow.show(screenPoint, map.getInfoWindowAnchor(screenPoint));
});
//Update the feature service attributes and add each attribute change to
//the undo manager for undo/redo capability
attInspector.on("attribute-change", function(evt) {
var feature = evt.feature;
feature.attributes[evt.fieldName] = evt.newFieldValue;
var layer = feature.getLayer();
layer.applyEdits(null, [feature], null, function() {
var operation = new Update({
featureLayer: layer,
preUpdatedGraphics: [new Graphic(originalFeature)],
postUpdatedGraphics: [feature]
});
undoManager.add(operation);
checkUI();
});
});
var templatePicker = new TemplatePicker({
featureLayers: layers,
rows: "auto",
columns: 3,
grouping: true
}, "templatePickerDiv");
templatePicker.startup();
var drawToolbar = new Draw(map);
var selectedTemplate;
//when users select an item from the template picker activate the draw toolbar
//with the geometry type of the selected template item.
templatePicker.on("selection-change", function() {
if (templatePicker.getSelected()) {
selectedTemplate = templatePicker.getSelected();
}
drawToolbar.activate(Draw.POINT);
});
//once the geometry is drawn - call applyEdits to update the feature service with the new geometry
drawToolbar.on("draw-complete", function(evt) {
drawToolbar.deactivate();
var newAttributes = dojo.mixin({}, selectedTemplate.template.prototype.attributes);
var newGraphic = new Graphic(evt.geometry, null, newAttributes);
//when features are added - add them to the undo manager
selectedTemplate.featureLayer.applyEdits([newGraphic], null, null, function() {
var operation = new Add({
featureLayer: selectedTemplate.featureLayer,
addedGraphics: [newGraphic]
});
undoManager.add(operation);
checkUI();
});
});
}
//disable or enable undo/redo buttons depending on current app state
function checkUI() {
if (undoManager.canUndo) {
dijit.byId("undo").set("disabled", false);
}
else {
dijit.byId("undo").set("disabled", true);
}
if (undoManager.canRedo) {
dijit.byId("redo").set("disabled", false);
}
else {
dijit.byId("redo").set("disabled", true);
}
}
});
</script>
</head>
<body class="claro">
<div data-dojo-type="dijit/layout/BorderContainer" data-dojo-props="gutters:true, design:'sidebar'" style="width:100%;height:100%;">
<div id="map" data-dojo-type="dijit/layout/ContentPane" data-dojo-props="region:'center'"></div>
<div id="rightPane" data-dojo-type="dijit/layout/ContentPane" data-dojo-props="region:'right'">
<div id="templatePickerDiv"></div>
<div class="undoButtons">
<button id="undo" data-dojo-type="dijit/form/Button" data-dojo-props="disabled:true, iconClass:'undoIcon'" >Undo</button>
<button id="redo" data-dojo-type="dijit/form/Button" data-dojo-props="disabled:true, iconClass:'redoIcon'" >Redo</button>
</div>
<div class='instructions'>
<ul style="list-style:none;padding-left:4px;">
<li><b>Create Features:</b> Select template then click on map.</li>
<li><b>Delete Features:</b> Ctrl or Cmd + Click feature.</li>
</ul>
The undo/redo buttons will become enabled after editing the feature attributes or geometry.
</div>
</div>
</div>
</body>
</html>