Shape to use with this rubber band mode.
Object.defineProperty(ImageViewerZoomToInteractiveMode.prototype, 'shape',
get: function(),
set: function(value)
)
shape: ImageViewerRubberBandShape;
The shape to use with this rubber band mode. Default value is ImageViewerRubberBandShape.Rectangle.
This mode does not support ImageViewerRubberBandShape.Freehand, trying to set this shape will throw an exception.
You cannot change the shape if the mode is already working. Doing so will throw an exception.
import { ImageViewer_Example } from "../ImageViewer";
export class ImageViewer_RubberBandInteractiveModeExample {
private viewerExample;
constructor() {
this.viewerExample = new ImageViewer_Example(this.run);
}
private run = (viewer: lt.Controls.ImageViewer) => {
const rubberBandMode: lt.Controls.ImageViewerRubberBandInteractiveMode = new lt.Controls.ImageViewerRubberBandInteractiveMode();
rubberBandMode.rubberBandCompleted.add((sender, e) => {
if (e.isCanceled || !rubberBandMode.item)
return;
const points: lt.LeadPointD[] = e.points.map((point) => { return point.clone(); });
let min = lt.LeadPointD.empty;
let max = lt.LeadPointD.empty;
for (let i = 0; i < points.length; i++) {
points[i] = viewer.convertPoint(rubberBandMode.item, lt.Controls.ImageViewerCoordinateType.control, lt.Controls.ImageViewerCoordinateType.image, points[i]);
if (i === 0) {
min = points[i].clone();
max = points[i].clone();
}
else {
min.x = Math.min(min.x, points[i].x);
min.y = Math.min(min.y, points[i].y);
max.x = Math.max(max.x, points[i].x);
max.y = Math.max(max.y, points[i].y);
}
}
const center: lt.LeadPointD = lt.LeadPointD.create(min.x + (max.x - min.x) / 2, min.y + (max.y - min.y) / 2);
const item: lt.Controls.ImageViewerItem = rubberBandMode.item;
const itemCanvas = item.canvas as HTMLCanvasElement;
const ctx: CanvasRenderingContext2D = itemCanvas.getContext("2d");
ctx.save();
ctx.beginPath();
const rect: lt.LeadRectD = lt.LeadRectD.fromLTRB(points[0].x, points[0].y, points[1].x, points[1].y);
ctx.rect(rect.x, rect.y, rect.width, rect.height)
ctx.closePath();
ctx.fillStyle = "rgba(0, 0, 255, .2)";
ctx.fill();
ctx.strokeStyle = "yellow";
ctx.stroke();
ctx.restore();
viewer.invalidate(lt.LeadRectD.empty);
});
rubberBandMode.autoItemMode = lt.Controls.ImageViewerAutoItemMode.autoSet;
rubberBandMode.itemPart = lt.Controls.ImageViewerItemPart.image;
viewer.interactiveModes.beginUpdate();
viewer.interactiveModes.clear();
viewer.interactiveModes.add(rubberBandMode);
viewer.interactiveModes.endUpdate();
}
}
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_RubberBandInteractiveModeExample {
viewerExample;
constructor() {
this.viewerExample = new ImageViewer_Example(this.run);
}
run = (viewer) => {
const rubberBandMode = new lt.Controls.ImageViewerRubberBandInteractiveMode();
rubberBandMode.rubberBandCompleted.add((sender, e) => {
if (e.isCanceled || !rubberBandMode.item)
return;
const points = e.points.map((point) => { return point.clone(); });
let min = lt.LeadPointD.empty;
let max = lt.LeadPointD.empty;
for (let i = 0; i < points.length; i++) {
points[i] = viewer.convertPoint(rubberBandMode.item, lt.Controls.ImageViewerCoordinateType.control, lt.Controls.ImageViewerCoordinateType.image, points[i]);
if (i === 0) {
min = points[i].clone();
max = points[i].clone();
}
else {
min.x = Math.min(min.x, points[i].x);
min.y = Math.min(min.y, points[i].y);
max.x = Math.max(max.x, points[i].x);
max.y = Math.max(max.y, points[i].y);
}
}
const center = lt.LeadPointD.create(min.x + (max.x - min.x) / 2, min.y + (max.y - min.y) / 2);
const item = rubberBandMode.item;
const itemCanvas = item.canvas;
const ctx = itemCanvas.getContext("2d");
ctx.save();
ctx.beginPath();
const rect = lt.LeadRectD.fromLTRB(points[0].x, points[0].y, points[1].x, points[1].y);
ctx.rect(rect.x, rect.y, rect.width, rect.height)
ctx.closePath();
ctx.fillStyle = "rgba(0, 0, 255, .2)";
ctx.fill();
ctx.strokeStyle = "yellow";
ctx.stroke();
ctx.restore();
viewer.invalidate(lt.LeadRectD.empty);
});
rubberBandMode.autoItemMode = lt.Controls.ImageViewerAutoItemMode.autoSet;
rubberBandMode.itemPart = lt.Controls.ImageViewerItemPart.image;
viewer.interactiveModes.beginUpdate();
viewer.interactiveModes.clear();
viewer.interactiveModes.add(rubberBandMode);
viewer.interactiveModes.endUpdate();
}
}
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 | RubberBandInteractiveMode</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.InteractiveMode.RubberBandInteractiveMode();
};
</script>
</html>
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