Take the following steps to create an application that implements LEADTOOLS HTML5 automated annotations:
Start with the html file you created in Displaying an Image.
Add the following additional LEADTOOLS Annotation JavaScript libraries by adding the below script tags in the head
section of your HTML after the previous LEADTOOLS libraries and copy the mentioned libs to the lib folder we created in Displaying an Image:
<script type="text/javascript" src="lib/Leadtools.Annotations.Engine.js"></script>
<script type="text/javascript" src="lib/Leadtools.Annotations.Rendering.JavaScript.js"></script>
<script type="text/javascript" src="lib/Leadtools.Annotations.Designers.js"></script>
<script type="text/javascript" src="lib/Leadtools.Annotations.Automation.js"></script>
<script type="text/javascript" src="lib/Leadtools.Demos.Annotations.js"></script>
If you do not find library (Leadtools.Demos.Annotations.js), you can build it yourself. It comes from a demo included within the setup examples and is located here: "<LEADTOOLS_INSTALLDIR>\Examples\JS\Annotations\Leadtools.Demos.Annotations"
The annotation framework allows the user to define the images which are used for various annotations (stamps, point, lock, and hotspot). A default set of images for these objects is included with the toolkit. For this tutorial, we will use these default images. In order to make these objects available to your application, copy the "<LEADTOOLS_INSTALLDIR>\Examples\JS\Documents\Resources" directory to the same directory as your HTML file.
Add two select
elements to your page by inserting the below code in the body
section of your HTML before the image viewer DIV. These elements will be used to select the current user-mode, and the various types of annotation objects.
<label for="currentObject">Annotation Object:</label>
<select id="currentObject"></select>
<label for="userMode">User mode:</label>
<select id="userMode">
<option>Design</option>
<option>Run</option>
</select>
Update app.js
with the following code. This code will set up the automation manager and automation object for the application.
window.onload = function () {
// Get the container DIV
var imageViewerDiv = document.getElementById("imageViewerDiv");
// Create the image viewer inside it
var createOptions = new lt.Controls.ImageViewerCreateOptions(imageViewerDiv);
var imageViewer = new lt.Controls.ImageViewer(createOptions);
// Add handler to show an alert on errors
imageViewer.itemError.add(function (sender, e) {
alert("Error loading " + e.data.srcElement.src);
});
imageViewer.imageUrl = "https://demo.leadtools.com/images/png/pngimage.png";
// Create and set up the automation manager using the HTML5 rendering engine
var renderingEngine = new lt.Annotations.Rendering.AnnHtml5RenderingEngine();
var manager = new lt.Annotations.Automation.AnnAutomationManager.create(renderingEngine);
// Create the default annotations objects
manager.createDefaultObjects();
var currentObject = document.getElementById("currentObject");
var automationObjCount = manager.objects.count;
for (var i = 0; i < automationObjCount; i++) {
// Get the object
var automationObj = manager.objects.item(i);
// Add its name to the select element
var name = automationObj.name;
var id = automationObj.id;
currentObject.options[currentObject.options.length] = new Option(name, id);
}
// Hook to its change event
currentObject.addEventListener("change", function () {
// Get the object ID
var id = parseInt(currentObject.options[currentObject.selectedIndex].value);
// Set it as the current object in the manager
manager.currentObjectId = id;
});
// When the current object ID changes, we need to update our select
manager.currentObjectIdChanged.add(function (sender, e) {
var currentObjectId = manager.currentObjectId;
for (var i = 0; i < currentObject.options.length; i++) {
var id = parseInt(currentObject.options[i].value);
if (id === currentObjectId) {
currentObject.selectedIndex = i;
break;
}
}
});
var userMode = document.getElementById("userMode");
// Hook to its change event
userMode.addEventListener("change", function () {
// Get the selected mode
var mode = userMode.options[userMode.selectedIndex].innerHTML;
if (mode == "Design") {
manager.userMode = lt.Annotations.Engine.AnnUserMode.design;
} else {
manager.userMode = lt.Annotations.Engine.AnnUserMode.run;
}
});
// Create an instance of the Automation control object that works with LEADTOOLS ImageViewer
var automationControl = new lt.Demos.Annotations.ImageViewerAutomationControl();
// Attach our image viewer
automationControl.imageViewer = imageViewer;
// Set the image viewer interactive mode
var automationInteractiveMode = new lt.Demos.Annotations.AutomationInteractiveMode();
automationInteractiveMode.automationControl = automationControl;
imageViewer.defaultInteractiveMode = automationInteractiveMode;
// set up the automation (will create the container as well)
var automation = new lt.Annotations.Automation.AnnAutomation(manager, automationControl);
// Add handler to update the container size when the image size changes
imageViewer.itemChanged.add(function (sender, e) {
var container = automation.container;
container.size = container.mapper.sizeToContainerCoordinates(imageViewer.imageSize);
});
// set up this automation as the active one
automation.active = true;
// Hook to the run even so we know when an object enters run mode
automation.run.add(function (sender, e) {
// e is of type AnnRunDesignerEventArgs
if (e.operationStatus == lt.Annotations.Engine.AnnDesignerOperationStatus.start) {
// Get the object being run
alert("In run mode, you clicked an object of id " + e.object.id);
}
});
// Optional: Add the resources to the automation manager
addResources(manager);
}
function addResources(manager) {
// Add images for the stamp, point, hot spot, and lock annotations
var resources = new lt.Annotations.Engine.AnnResources();
manager.resources = resources;
var rubberStampsResources = resources.rubberStamps;
var imagesResources = resources.images;
rubberStampsResources[lt.Annotations.Engine.AnnRubberStampType.stampApproved] = new lt.Annotations.Engine.AnnPicture("resources/objects/RubberStamps/approved.png");
rubberStampsResources[lt.Annotations.Engine.AnnRubberStampType.stampAssigned] = new lt.Annotations.Engine.AnnPicture("resources/objects/RubberStamps/Assigned.png");
rubberStampsResources[lt.Annotations.Engine.AnnRubberStampType.stampClient] = new lt.Annotations.Engine.AnnPicture("resources/objects/RubberStamps/Client.png");
rubberStampsResources[lt.Annotations.Engine.AnnRubberStampType.stampChecked] = new lt.Annotations.Engine.AnnPicture("resources/objects/RubberStamps/checked.png");
rubberStampsResources[lt.Annotations.Engine.AnnRubberStampType.stampCopy] = new lt.Annotations.Engine.AnnPicture("resources/objects/RubberStamps/Copy.png");
rubberStampsResources[lt.Annotations.Engine.AnnRubberStampType.stampDraft] = new lt.Annotations.Engine.AnnPicture("resources/objects/RubberStamps/Draft.png");
rubberStampsResources[lt.Annotations.Engine.AnnRubberStampType.stampExtended] = new lt.Annotations.Engine.AnnPicture("resources/objects/RubberStamps/Extended.png");
rubberStampsResources[lt.Annotations.Engine.AnnRubberStampType.stampFax] = new lt.Annotations.Engine.AnnPicture("resources/objects/RubberStamps/Fax.png");
rubberStampsResources[lt.Annotations.Engine.AnnRubberStampType.stampFaxed] = new lt.Annotations.Engine.AnnPicture("resources/objects/RubberStamps/Faxed.png");
rubberStampsResources[lt.Annotations.Engine.AnnRubberStampType.stampImportant] = new lt.Annotations.Engine.AnnPicture("resources/objects/RubberStamps/Important.png");
rubberStampsResources[lt.Annotations.Engine.AnnRubberStampType.stampInvoice] = new lt.Annotations.Engine.AnnPicture("resources/objects/RubberStamps/Invoice.png");
rubberStampsResources[lt.Annotations.Engine.AnnRubberStampType.stampNotice] = new lt.Annotations.Engine.AnnPicture("resources/objects/RubberStamps/Notice.png");
rubberStampsResources[lt.Annotations.Engine.AnnRubberStampType.stampPaid] = new lt.Annotations.Engine.AnnPicture("resources/objects/RubberStamps/Paid.png");
rubberStampsResources[lt.Annotations.Engine.AnnRubberStampType.stampOfficial] = new lt.Annotations.Engine.AnnPicture("resources/objects/RubberStamps/Official.png");
rubberStampsResources[lt.Annotations.Engine.AnnRubberStampType.stampOnFile] = new lt.Annotations.Engine.AnnPicture("resources/objects/RubberStamps/Onfile.png");
rubberStampsResources[lt.Annotations.Engine.AnnRubberStampType.stampPassed] = new lt.Annotations.Engine.AnnPicture("resources/objects/RubberStamps/Passed.png");
rubberStampsResources[lt.Annotations.Engine.AnnRubberStampType.stampPending] = new lt.Annotations.Engine.AnnPicture("resources/objects/RubberStamps/Pending.png");
rubberStampsResources[lt.Annotations.Engine.AnnRubberStampType.stampProcessed] = new lt.Annotations.Engine.AnnPicture("resources/objects/RubberStamps/Processed.png");
rubberStampsResources[lt.Annotations.Engine.AnnRubberStampType.stampReceived] = new lt.Annotations.Engine.AnnPicture("resources/objects/RubberStamps/Received.png");
rubberStampsResources[lt.Annotations.Engine.AnnRubberStampType.stampRejected] = new lt.Annotations.Engine.AnnPicture("resources/objects/RubberStamps/rejected.png");
rubberStampsResources[lt.Annotations.Engine.AnnRubberStampType.stampRelease] = new lt.Annotations.Engine.AnnPicture("resources/objects/RubberStamps/Release.png");
rubberStampsResources[lt.Annotations.Engine.AnnRubberStampType.stampSent] = new lt.Annotations.Engine.AnnPicture("resources/objects/RubberStamps/Sent.png");
rubberStampsResources[lt.Annotations.Engine.AnnRubberStampType.stampShipped] = new lt.Annotations.Engine.AnnPicture("resources/objects/RubberStamps/Shipped.png");
rubberStampsResources[lt.Annotations.Engine.AnnRubberStampType.stampTopSecret] = new lt.Annotations.Engine.AnnPicture("resources/objects/RubberStamps/topsecret.png");
rubberStampsResources[lt.Annotations.Engine.AnnRubberStampType.stampUrgent] = new lt.Annotations.Engine.AnnPicture("resources/objects/RubberStamps/urgent.png");
rubberStampsResources[lt.Annotations.Engine.AnnRubberStampType.stampVoid] = new lt.Annotations.Engine.AnnPicture("resources/objects/RubberStamps/void.png");
imagesResources.add(new lt.Annotations.Engine.AnnPicture("resources/objects/Point.png"));
imagesResources.add(new lt.Annotations.Engine.AnnPicture("resources/objects/lock.png"));
imagesResources.add(new lt.Annotations.Engine.AnnPicture("resources/objects/hotspot.png"));
}