Gets or a sets a value that indicates whether the drag/drop operation is to be aborted.
Object.defineProperty(ImageViewerItemDragDropEventArgs.prototype, 'abort',
get: function(),
set: function(value)
)
abort: boolean;
true if the drag/drop operation is to be aborted; otherwise, false. The default value is false.
import { ImageViewer_Example } from "../ImageViewer";
export class ImageViewer_ItemDragDropExample {
private viewerExample;
constructor() {
this.viewerExample = new ImageViewer_Example(this.run);
}
private run = (viewer: lt.Controls.ImageViewer) => {
// Set margins, padding, and borders
viewer.viewMargin = lt.Controls.ControlPadding.createAll(15);
viewer.itemPadding = lt.Controls.ControlPadding.createAll(20);
viewer.itemBorderThickness = 5;
viewer.itemMargin = lt.Controls.ControlPadding.createAll(10);
// Clear the items and add new ones
viewer.beginUpdate();
viewer.items.clear();
viewer.viewLayout = new lt.Controls.ImageViewerVerticalViewLayout();
let item0: lt.Controls.ImageViewerItem = new lt.Controls.ImageViewerItem();
item0.text = "Item 0";
item0.url = "https://demo.leadtools.com/images/jpeg/cannon.jpg";
viewer.items.add(item0);
let item1: lt.Controls.ImageViewerItem = new lt.Controls.ImageViewerItem();
item1.text = "Item 1";
item1.url = "https://demo.leadtools.com/images/png/pngimage.png";
viewer.items.add(item1);
viewer.endUpdate();
viewer.allowDrop = true;
viewer.activeItem = viewer.items.item(0);
viewer.interactiveModes.beginUpdate();
const dragMode = new lt.Controls.ImageViewerDragInteractiveMode();
viewer.interactiveModes.insert(0, dragMode);
viewer.interactiveModes.endUpdate();
const getOpName = (value) => {
const enumOb = lt.Controls.ImageViewerItemDragDropOperation;
for (const prop in enumOb) {
if (enumOb.hasOwnProperty(prop)) {
if (enumOb[prop] === value)
return prop;
}
}
return null;
}
let previousOp: lt.Controls.ImageViewerItemDragDropOperation = null;
// Drag items to use
viewer.itemDragDrop.add((sender, e) => {
if (previousOp === e.operation)
return;
previousOp = e.operation;
const sourceItem: lt.Controls.ImageViewerItem = e.sourceItem;
const sourceImageViewer: lt.Controls.ImageViewer = e.sourceImageViewer;
const targetItem: lt.Controls.ImageViewerItem = e.targetItem;
const targetImageViewer: lt.Controls.ImageViewer = e.targetImageViewer;
// Log all the information to the console
console.log({
operation: getOpName(e.operation),
sourceItem: sourceItem && sourceImageViewer.items.indexOf(sourceItem),
sourceImageViewer: sourceImageViewer,
targetItem: targetItem && targetImageViewer && targetImageViewer.items.indexOf(targetItem),
targetImageViewer: targetImageViewer
});
});
}
}
export class ImageViewer_Example {
// LEADTOOLS ImageViewer to be used with this example
protected imageViewer: lt.Controls.ImageViewer = null;
// Generic state value used by the examples
public timesClicked: number = 0;
constructor(callback?: (viewer: lt.Controls.ImageViewer) => void) {
// Set the LEADTOOLS license. Replace this with your actual license file
lt.RasterSupport.setLicenseUri("https://demo.leadtools.com/licenses/js/LEADTOOLSEVAL.txt", "EVAL", null);
// Create an image viewer inside the imageViewerDiv element
const imageViewerDiv = document.getElementById("imageViewerDiv");
const createOptions: lt.Controls.ImageViewerCreateOptions = new lt.Controls.ImageViewerCreateOptions(imageViewerDiv);
this.imageViewer = new lt.Controls.ImageViewer(createOptions);
this.imageViewer.viewVerticalAlignment = lt.Controls.ControlAlignment.center;
this.imageViewer.viewHorizontalAlignment = lt.Controls.ControlAlignment.center;
this.imageViewer.autoCreateCanvas = true;
// Add Pan/Zoom interactive mode
// Click and drag to pan, CTRL-Click and drag to zoom in and out
this.imageViewer.interactiveModes.add(new lt.Controls.ImageViewerPanZoomInteractiveMode());
// Load an image
this.imageViewer.imageUrl = "https://demo.leadtools.com/images/jpeg/cannon.jpg";
this.imageViewer.zoom(lt.Controls.ControlSizeMode.fit, .9, this.imageViewer.defaultZoomOrigin);
const exampleButton = document.getElementById("exampleButton");
exampleButton.addEventListener("click", () => {
this.timesClicked++;
// Run the example
if (callback)
callback(this.imageViewer);
});
}
}
import { ImageViewer_Example } from "../ImageViewer";
export class ImageViewer_ItemDragDropExample {
viewerExample;
constructor() {
this.viewerExample = new ImageViewer_Example(this.run);
}
run = (viewer) => {
// Set margins, padding, and borders
viewer.viewMargin = lt.Controls.ControlPadding.createAll(15);
viewer.itemPadding = lt.Controls.ControlPadding.createAll(20);
viewer.itemBorderThickness = 5;
viewer.itemMargin = lt.Controls.ControlPadding.createAll(10);
// Clear the items and add new ones
viewer.beginUpdate();
viewer.items.clear();
viewer.viewLayout = new lt.Controls.ImageViewerVerticalViewLayout();
let item0 = new lt.Controls.ImageViewerItem();
item0.text = "Item 0";
item0.url = "https://demo.leadtools.com/images/jpeg/cannon.jpg";
viewer.items.add(item0);
let item1 = new lt.Controls.ImageViewerItem();
item1.text = "Item 1";
item1.url = "https://demo.leadtools.com/images/png/pngimage.png";
viewer.items.add(item1);
viewer.endUpdate();
viewer.allowDrop = true;
viewer.activeItem = viewer.items.item(0);
viewer.interactiveModes.beginUpdate();
const dragMode = new lt.Controls.ImageViewerDragInteractiveMode();
viewer.interactiveModes.insert(0, dragMode);
viewer.interactiveModes.endUpdate();
const getOpName = (value) => {
const enumOb = lt.Controls.ImageViewerItemDragDropOperation;
for (const prop in enumOb) {
if (enumOb.hasOwnProperty(prop)) {
if (enumOb[prop] === value)
return prop;
}
}
return null;
}
let previousOp = null;
// Drag items to use
viewer.itemDragDrop.add((sender, e) => {
if (previousOp === e.operation)
return;
previousOp = e.operation;
const sourceItem = e.sourceItem;
const sourceImageViewer = e.sourceImageViewer;
const targetItem = e.targetItem;
const targetImageViewer = e.targetImageViewer;
// Log all the information to the console
console.log({
operation: getOpName(e.operation),
sourceItem: sourceItem && sourceImageViewer.items.indexOf(sourceItem),
sourceImageViewer: sourceImageViewer,
targetItem: targetItem && targetImageViewer && targetImageViewer.items.indexOf(targetItem),
targetImageViewer: targetImageViewer
});
});
}
}
export class ImageViewer_Example {
// LEADTOOLS ImageViewer to be used with this example
imageViewer = null;
// Generic state value used by the examples
timesClicked = 0;
constructor(callback) {
// Set the LEADTOOLS license. Replace this with your actual license file
lt.RasterSupport.setLicenseUri("https://demo.leadtools.com/licenses/js/LEADTOOLSEVAL.txt", "EVAL", null);
// Create an image viewer inside the imageViewerDiv element
const imageViewerDiv = document.getElementById("imageViewerDiv");
const createOptions = new lt.Controls.ImageViewerCreateOptions(imageViewerDiv);
this.imageViewer = new lt.Controls.ImageViewer(createOptions);
this.imageViewer.viewVerticalAlignment = lt.Controls.ControlAlignment.center;
this.imageViewer.viewHorizontalAlignment = lt.Controls.ControlAlignment.center;
this.imageViewer.autoCreateCanvas = true;
// Add Pan/Zoom interactive mode
// Click and drag to pan, CTRL-Click and drag to zoom in and out
this.imageViewer.interactiveModes.add(new lt.Controls.ImageViewerPanZoomInteractiveMode());
// Load an image
this.imageViewer.imageUrl = "https://demo.leadtools.com/images/jpeg/cannon.jpg";
this.imageViewer.zoom(lt.Controls.ControlSizeMode.fit, .9, this.imageViewer.defaultZoomOrigin);
const exampleButton = document.getElementById("exampleButton");
exampleButton.addEventListener("click", () => {
this.timesClicked++;
// Run the example
if (callback)
callback(this.imageViewer);
});
}
}
<!doctype html>
<html lang="en">
<title>Controls Example | ItemDragonDrop</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.ImageProcessing.Main.js"></script>
<script src="../../LT/Leadtools.ImageProcessing.Color.js"></script>
<script src="../../LT/Leadtools.ImageProcessing.Core.js"></script>
<script src="../../LT/Leadtools.ImageProcessing.Effects.js"></script>
<script src="../../LT/Leadtools.Document.js"></script>
<script src="../../LT/Leadtools.Document.Viewer.js"></script>
<style>
body {
font-family: 'Segoe UI', sans-serif;
}
#imageViewerDiv {
border: 1px solid #888;
width: 500px;
height: 500px;
background-color: #eee;
}
</style>
<!-- All demo files are bundled and appended to the window -->
<script src="../../bundle.js" type="text/javascript"></script>
</head>
<body>
<p>Press and drag on the image to pan.</p>
<p>Hold down the control key and press and drag on the image or pinch with two fingers to zoom in and out.</p>
<div>
<button type="button" id="exampleButton">Run Example</button>
</div>
<div id="imageViewerDiv"></div>
<div id="output"></div>
</body>
<script>
window.onload = () => {
const example = new window.examples.ImageViewer.ItemDragDrop();
};
</script>
</html>
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