Reverses the last operation performed in this AnnAutomation.
AnnAutomation.prototype.undo = function()
undo(): void;
If the CanUndo property returns true, this method will undo the last operation performed in this AnnAutomation.
Use the UndoCapacity property to get or set the number of user actions that can be reversed using the Undo method, or reapplied using the Redo method. The default for the UndoCapacity property is 10 actions.
For information on undoing or redoing automation operations, refer to Undoing Annotation Automation Operations.
import { AutomationHelper } from "../utilities/AutomationHelper";
export class AnnAutomation_BeginUndoExample {
private automation: lt.Annotations.Automation.AnnAutomation = null;
constructor() {
const helper = new AutomationHelper();
helper.run(this.updateAutomation);
document.getElementById('exampleButton').onclick = () => this.run(this.automation);
}
private updateAutomation = (automation) => this.automation = automation;
private run = (automation: lt.Annotations.Automation.AnnAutomation) => {
automation.beginUndo();
try {
// add a new rectangle object
const rectObj: lt.Annotations.Engine.AnnRectangleObject = new lt.Annotations.Engine.AnnRectangleObject();
rectObj.rect = lt.LeadRectD.create(100, 100, 800, 800);
rectObj.stroke = lt.Annotations.Engine.AnnStroke.create(lt.Annotations.Engine.AnnSolidColorBrush.create("blue"),
lt.LeadLengthD.create(1));
rectObj.fill = lt.Annotations.Engine.AnnSolidColorBrush.create("yellow");
automation.container.children.add(rectObj);
// Invalidate it
automation.invalidate(lt.LeadRectD.get_empty());
// Select this object
automation.selectObject(rectObj);
// commit the undo node
automation.endUndo();
}
catch (ex) {
// in case of errors, cancel the undo node
automation.cancelUndo();
alert(ex.message);
return;
}
alert("Object has been added as is now selected. Next will call //Undo// to undo the operation");
automation.undo();
alert("Operation has been undone. Next will call //Redo// to redo the operation");
automation.redo();
alert("Object should be back and selected");
}
}
export class AutomationHelper {
private automation: lt.Annotations.Automation.AnnAutomation = null;
constructor() {
lt.RasterSupport.setLicenseUri("https://demo.leadtools.com/licenses/js/LEADTOOLSEVAL.txt", "EVAL", null);
}
public run(callback?: (automation: lt.Annotations.Automation.AnnAutomation) => void): void {
// Create the viewer
const imageViewerDiv = document.getElementById("imageViewerDiv");
const createOptions: lt.Controls.ImageViewerCreateOptions = new lt.Controls.ImageViewerCreateOptions(imageViewerDiv);
const viewer: lt.Controls.ImageViewer = new lt.Controls.ImageViewer(createOptions);
viewer.autoCreateCanvas = true;
// PanZoom interactive mode
const panZoom: lt.Controls.ImageViewerPanZoomInteractiveMode = new lt.Controls.ImageViewerPanZoomInteractiveMode();
// Create an instance of the Automation control object that works with LEADTOOLS ImageViewer
const imageViewerAutomationControl: lt.Demos.Annotations.ImageViewerAutomationControl = new lt.Demos.Annotations.ImageViewerAutomationControl();
// Attach our image viewer
imageViewerAutomationControl.imageViewer = viewer;
// Set the image viewer interactive mode
const automationInteractiveMode: lt.Demos.Annotations.AutomationInteractiveMode = new lt.Demos.Annotations.AutomationInteractiveMode();
automationInteractiveMode.automationControl = imageViewerAutomationControl;
// Set the image URL
viewer.imageUrl = "http://demo.leadtools.com/images/png/pngimage.png";
// Create and set up the automation manager using the HTML5 rendering engine
const renderingEngine: lt.Annotations.Rendering.AnnHtml5RenderingEngine = new lt.Annotations.Rendering.AnnHtml5RenderingEngine();
const manager: lt.Annotations.Automation.AnnAutomationManager = lt.Annotations.Automation.AnnAutomationManager.create(renderingEngine);
// Create only the line and rectangle automation objects
this.createMyAutomationObjects(manager);
// You can instruct the manager to create the default (all) automation objects.
// comment out the call to CreateMyAutomationObjects and call this instead:
//manager.createDefaultObjects();
// Add the objects to the objects select element
const currentObjectIdSelect = document.getElementById("currentObjectIdSelect") as HTMLSelectElement;
// Add the PanZoom option
currentObjectIdSelect.options[currentObjectIdSelect.options.length] = new Option("Pan/Zoom", lt.Annotations.Engine.AnnObject.none.toString());
const automationObjCount: number = manager.objects.count;
for (let i = 0; i < automationObjCount; i++) {
// Get the object
const automationObj: lt.Annotations.Automation.AnnAutomationObject = manager.objects.item(i);
// Add its name to the select element
const name: string = automationObj.name;
const id: number = automationObj.id;
currentObjectIdSelect.options[currentObjectIdSelect.options.length] = new Option(name, id.toString());
}
// Hook to its change event
currentObjectIdSelect.addEventListener("change", () => {
// Get the object ID
const id: number = parseInt(currentObjectIdSelect.options[currentObjectIdSelect.selectedIndex].value);
// Set it as the current object in the manager
manager.currentObjectId = id;
// If this is the "Pan/Zoom" option, then back to pan zoom, otherwise, set our automation control
if (id == lt.Annotations.Engine.AnnObject.none) {
viewer.defaultInteractiveMode = panZoom;
}
else {
viewer.defaultInteractiveMode = automationInteractiveMode;
}
});
// When the current object ID changes, we need to update our select
manager.add_currentObjectIdChanged((sender, e) => {
const currentObjectId: number = manager.currentObjectId;
for (let i = 0; i < currentObjectIdSelect.options.length; i++) {
const id: number = parseInt(currentObjectIdSelect.options[i].value);
if (id === currentObjectId) {
currentObjectIdSelect.selectedIndex = i;
break;
}
}
});
// Pan zoom by default
viewer.defaultInteractiveMode = panZoom;
// Set up the automation (will create the container as well)
const automation: lt.Annotations.Automation.AnnAutomation = new lt.Annotations.Automation.AnnAutomation(manager, imageViewerAutomationControl);
this.automation = automation;
// Add handler to update the container size when the image size changes
viewer.itemChanged.add((sender, e) => {
const container: lt.Annotations.Engine.AnnContainer = automation.container;
container.size = container.mapper.sizeToContainerCoordinates(viewer.imageSize);
// Create new canvas data provider for the new image
const canvasDataProvider: lt.Demos.Annotations.CanvasDataProvider = new lt.Demos.Annotations.CanvasDataProvider(viewer.activeItem.canvas);
imageViewerAutomationControl.automationDataProvider = canvasDataProvider;
});
// Set up this automation as the active one
this.automation.active = true;
if(callback)
callback(this.automation);
}
private createMyAutomationObjects(manager): void {
// Get the automation objects collection
const automationObjects = manager.objects;
// Set up the select automation object
const selectAutomationObj: lt.Annotations.Automation.AnnAutomationObject = new lt.Annotations.Automation.AnnAutomationObject();
selectAutomationObj.id = lt.Annotations.Engine.AnnObject.selectObjectId;
selectAutomationObj.name = "Select";
selectAutomationObj.drawDesignerType = lt.Annotations.Designers.AnnRectangleDrawDesigner;
selectAutomationObj.editDesignerType = lt.Annotations.Designers.AnnSelectionEditDesigner;
selectAutomationObj.runDesignerType = null;
// Create the object template for it
const selectObj: lt.Annotations.Engine.AnnSelectionObject = new lt.Annotations.Engine.AnnSelectionObject();
selectObj.stroke = lt.Annotations.Engine.AnnStroke.create(lt.Annotations.Engine.AnnSolidColorBrush.create("darkgreen"), lt.LeadLengthD.create(2));
selectAutomationObj.objectTemplate = selectObj;
// Add it to the automation objects of the manager
automationObjects.add(selectAutomationObj);
// Set up the line automation object
const lineAutomationObj: lt.Annotations.Automation.AnnAutomationObject = new lt.Annotations.Automation.AnnAutomationObject();
lineAutomationObj.id = lt.Annotations.Engine.AnnObject.lineObjectId;
lineAutomationObj.name = "Line";
lineAutomationObj.drawDesignerType = lt.Annotations.Designers.AnnLineDrawDesigner;
lineAutomationObj.editDesignerType = lt.Annotations.Designers.AnnPolylineEditDesigner;
lineAutomationObj.runDesignerType = lt.Annotations.Designers.AnnRunDesigner;
// Create the object template for it, use the default stroke
const lineObj: lt.Annotations.Engine.AnnPolylineObject = new lt.Annotations.Engine.AnnPolylineObject();
lineAutomationObj.objectTemplate = lineObj;
// Add it to the automation objects of the manager
automationObjects.add(lineAutomationObj);
// Set up the rectangle automation object
const rectAutomationObj: lt.Annotations.Automation.AnnAutomationObject = new lt.Annotations.Automation.AnnAutomationObject();
rectAutomationObj.id = lt.Annotations.Engine.AnnObject.rectangleObjectId;
rectAutomationObj.name = "Rectangle";
rectAutomationObj.drawDesignerType = lt.Annotations.Designers.AnnRectangleDrawDesigner;
rectAutomationObj.editDesignerType = lt.Annotations.Designers.AnnRectangleEditDesigner;
rectAutomationObj.runDesignerType = lt.Annotations.Designers.AnnRunDesigner;
// Create the object template for it, use the default stroke and fill
const rectObj: lt.Annotations.Engine.AnnRectangleObject = new lt.Annotations.Engine.AnnRectangleObject();
rectAutomationObj.set_objectTemplate(rectObj);
// Add it to the automation objects of the manager
automationObjects.add(rectAutomationObj);
const textAutomationObj: lt.Annotations.Automation.AnnAutomationObject = new lt.Annotations.Automation.AnnAutomationObject();
textAutomationObj.id = lt.Annotations.Engine.AnnObject.textObjectId;
textAutomationObj.name = "Text";
textAutomationObj.drawDesignerType = lt.Annotations.Designers.AnnRectangleDrawDesigner;
textAutomationObj.editDesignerType = lt.Annotations.Designers.AnnTextEditDesigner;
textAutomationObj.runDesignerType = lt.Annotations.Designers.AnnRunDesigner;
// Create the object template for it, use the default stroke, fill, text and font
const textObj: lt.Annotations.Engine.AnnTextObject = new lt.Annotations.Engine.AnnTextObject();
textAutomationObj.objectTemplate = textObj;
// Add it to the automation objects of the manager
automationObjects.add(textAutomationObj);
}
}
import { AutomationHelper } from "../utilities/AutomationHelper";
export class AnnAutomation_BeginUndoExample {
automation = null;
constructor() {
const helper = new AutomationHelper();
helper.run(this.updateAutomation);
document.getElementById('exampleButton').onclick = () => this.run(this.automation);
}
updateAutomation = (automation) => this.automation = automation;
run = (automation) => {
automation.beginUndo();
try {
// add a new rectangle object
const rectObj = new lt.Annotations.Engine.AnnRectangleObject();
rectObj.rect = lt.LeadRectD.create(100, 100, 800, 800);
rectObj.stroke = lt.Annotations.Engine.AnnStroke.create(lt.Annotations.Engine.AnnSolidColorBrush.create("blue"),
lt.LeadLengthD.create(1));
rectObj.fill = lt.Annotations.Engine.AnnSolidColorBrush.create("yellow");
automation.container.children.add(rectObj);
// Invalidate it
automation.invalidate(lt.LeadRectD.get_empty());
// Select this object
automation.selectObject(rectObj);
// commit the undo node
automation.endUndo();
}
catch (ex) {
// in case of errors, cancel the undo node
automation.cancelUndo();
alert(ex.message);
return;
}
alert("Object has been added as is now selected. Next will call //Undo// to undo the operation");
automation.undo();
alert("Operation has been undone. Next will call //Redo// to redo the operation");
automation.redo();
alert("Object should be back and selected");
}
}
export class AutomationHelper {
automation = null;
constructor() {
lt.RasterSupport.setLicenseUri("https://demo.leadtools.com/licenses/js/LEADTOOLSEVAL.txt", "EVAL", null);
}
run(callback) {
// Create the viewer
const imageViewerDiv = document.getElementById("imageViewerDiv");
const createOptions = new lt.Controls.ImageViewerCreateOptions(imageViewerDiv);
const viewer = new lt.Controls.ImageViewer(createOptions);
viewer.autoCreateCanvas = true;
// PanZoom interactive mode
const panZoom = new lt.Controls.ImageViewerPanZoomInteractiveMode();
// Create an instance of the Automation control object that works with LEADTOOLS ImageViewer
const imageViewerAutomationControl = new lt.Demos.Annotations.ImageViewerAutomationControl();
// Attach our image viewer
imageViewerAutomationControl.imageViewer = viewer;
// Set the image viewer interactive mode
const automationInteractiveMode = new lt.Demos.Annotations.AutomationInteractiveMode();
automationInteractiveMode.automationControl = imageViewerAutomationControl;
// Set the image URL
viewer.imageUrl = "http://demo.leadtools.com/images/png/pngimage.png";
// Create and set up the automation manager using the HTML5 rendering engine
const renderingEngine = new lt.Annotations.Rendering.AnnHtml5RenderingEngine();
const manager = lt.Annotations.Automation.AnnAutomationManager.create(renderingEngine);
// Create only the line and rectangle automation objects
this.createMyAutomationObjects(manager);
// You can instruct the manager to create the default (all) automation objects.
// comment out the call to CreateMyAutomationObjects and call this instead:
//manager.createDefaultObjects();
// Add the objects to the objects select element
const currentObjectIdSelect = document.getElementById("currentObjectIdSelect");
// Add the PanZoom option
currentObjectIdSelect.options[currentObjectIdSelect.options.length] = new Option("Pan/Zoom", lt.Annotations.Engine.AnnObject.none.toString());
const automationObjCount = manager.objects.count;
for (let i = 0; i < automationObjCount; i++) {
// Get the object
const automationObj = manager.objects.item(i);
// Add its name to the select element
const name = automationObj.name;
const id = automationObj.id;
currentObjectIdSelect.options[currentObjectIdSelect.options.length] = new Option(name, id.toString());
}
// Hook to its change event
currentObjectIdSelect.addEventListener("change", () => {
// Get the object ID
const id = parseInt(currentObjectIdSelect.options[currentObjectIdSelect.selectedIndex].value);
// Set it as the current object in the manager
manager.currentObjectId = id;
// If this is the "Pan/Zoom" option, then back to pan zoom, otherwise, set our automation control
if (id == lt.Annotations.Engine.AnnObject.none) {
viewer.defaultInteractiveMode = panZoom;
}
else {
viewer.defaultInteractiveMode = automationInteractiveMode;
}
});
// When the current object ID changes, we need to update our select
manager.add_currentObjectIdChanged((sender, e) => {
const currentObjectId = manager.currentObjectId;
for (let i = 0; i < currentObjectIdSelect.options.length; i++) {
const id = parseInt(currentObjectIdSelect.options[i].value);
if (id === currentObjectId) {
currentObjectIdSelect.selectedIndex = i;
break;
}
}
});
// Pan zoom by default
viewer.defaultInteractiveMode = panZoom;
// Set up the automation (will create the container as well)
const automation = new lt.Annotations.Automation.AnnAutomation(manager, imageViewerAutomationControl);
this.automation = automation;
// Add handler to update the container size when the image size changes
viewer.itemChanged.add((sender, e) => {
const container = automation.container;
container.size = container.mapper.sizeToContainerCoordinates(viewer.imageSize);
// Create new canvas data provider for the new image
const canvasDataProvider = new lt.Demos.Annotations.CanvasDataProvider(viewer.activeItem.canvas);
imageViewerAutomationControl.automationDataProvider = canvasDataProvider;
});
// Set up this automation as the active one
this.automation.active = true;
if(callback)
callback(this.automation);
}
createMyAutomationObjects(manager) {
// Get the automation objects collection
const automationObjects = manager.objects;
// Set up the select automation object
const selectAutomationObj = new lt.Annotations.Automation.AnnAutomationObject();
selectAutomationObj.id = lt.Annotations.Engine.AnnObject.selectObjectId;
selectAutomationObj.name = "Select";
selectAutomationObj.drawDesignerType = lt.Annotations.Designers.AnnRectangleDrawDesigner;
selectAutomationObj.editDesignerType = lt.Annotations.Designers.AnnSelectionEditDesigner;
selectAutomationObj.runDesignerType = null;
// Create the object template for it
const selectObj = new lt.Annotations.Engine.AnnSelectionObject();
selectObj.stroke = lt.Annotations.Engine.AnnStroke.create(lt.Annotations.Engine.AnnSolidColorBrush.create("darkgreen"), lt.LeadLengthD.create(2));
selectAutomationObj.objectTemplate = selectObj;
// Add it to the automation objects of the manager
automationObjects.add(selectAutomationObj);
// Set up the line automation object
const lineAutomationObj = new lt.Annotations.Automation.AnnAutomationObject();
lineAutomationObj.id = lt.Annotations.Engine.AnnObject.lineObjectId;
lineAutomationObj.name = "Line";
lineAutomationObj.drawDesignerType = lt.Annotations.Designers.AnnLineDrawDesigner;
lineAutomationObj.editDesignerType = lt.Annotations.Designers.AnnPolylineEditDesigner;
lineAutomationObj.runDesignerType = lt.Annotations.Designers.AnnRunDesigner;
// Create the object template for it, use the default stroke
const lineObj = new lt.Annotations.Engine.AnnPolylineObject();
lineAutomationObj.objectTemplate = lineObj;
// Add it to the automation objects of the manager
automationObjects.add(lineAutomationObj);
// Set up the rectangle automation object
const rectAutomationObj = new lt.Annotations.Automation.AnnAutomationObject();
rectAutomationObj.id = lt.Annotations.Engine.AnnObject.rectangleObjectId;
rectAutomationObj.name = "Rectangle";
rectAutomationObj.drawDesignerType = lt.Annotations.Designers.AnnRectangleDrawDesigner;
rectAutomationObj.editDesignerType = lt.Annotations.Designers.AnnRectangleEditDesigner;
rectAutomationObj.runDesignerType = lt.Annotations.Designers.AnnRunDesigner;
// Create the object template for it, use the default stroke and fill
const rectObj = new lt.Annotations.Engine.AnnRectangleObject();
rectAutomationObj.set_objectTemplate(rectObj);
// Add it to the automation objects of the manager
automationObjects.add(rectAutomationObj);
const textAutomationObj = new lt.Annotations.Automation.AnnAutomationObject();
textAutomationObj.id = lt.Annotations.Engine.AnnObject.textObjectId;
textAutomationObj.name = "Text";
textAutomationObj.drawDesignerType = lt.Annotations.Designers.AnnRectangleDrawDesigner;
textAutomationObj.editDesignerType = lt.Annotations.Designers.AnnTextEditDesigner;
textAutomationObj.runDesignerType = lt.Annotations.Designers.AnnRunDesigner;
// Create the object template for it, use the default stroke, fill, text and font
const textObj = new lt.Annotations.Engine.AnnTextObject();
textAutomationObj.objectTemplate = textObj;
// Add it to the automation objects of the manager
automationObjects.add(textAutomationObj);
}
}
<!doctype html>
<html lang="en">
<title>Automation Example | EditText</title>
<head>
<script src="https://code.jquery.com/jquery-2.2.4.min.js"
integrity="sha256-BbhdlvQf/xTY9gja0Dq3HiwQF8LaCRTXxZKRutelT44=" crossorigin="anonymous"></script>
<script src="../../LT/Leadtools.js"></script>
<script src="../../LT/Leadtools.Controls.js"></script>
<script src="../../LT/Leadtools.Annotations.Engine.js"></script>
<script src="../../LT/Leadtools.Annotations.Designers.js"></script>
<script src="../../LT/Leadtools.Annotations.Rendering.Javascript.js"></script>
<script src="../../LT/Leadtools.Annotations.Automation.js"></script>
<script src="../../LT/Leadtools.Demos.js"></script>
<script src="../../LT/Leadtools.Demos.Annotations.Js"></script>
<style>
#imageViewerDiv {
border: 1px solid #000000;
width: 800px;
height: 800px;
background-color: #7F7F7F;
}
</style>
<!-- All demo files are bundled and appended to the window -->
<script src="../../bundle.js" type="text/javascript"></script>
</head>
<body>
<p>Either Pan/Zoom or Annotations mode. In annotations mode, draw new objects or edit them.</p>
<div>
<select id="currentObjectIdSelect"></select>
<input type="button" id="exampleButton" value="Example" />
<label id="exampleLabel" />
</div>
<div id="imageViewerDiv" />
</body>
<script>
window.onload = () => {
const example = new window.examples.AnnAutomation.BeginUndo();
};
</script>
</html>
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