The base class for all items that can be drawn on the SubCell.
function lt.Controls.Medical.Drawable
class lt.Controls.Medical.Drawable()
Drawable is the base class of the PanoramicPolygon class.
Perform the following steps to make the drawable interactive:
Implement the HitTest method to detect whether the created drawable has been clicked on.
import { MedicalViewer_2D_Color_Example } from "../MedicalViewer_2D_Color_Example";
class customDrawable extends lt.Controls.Medical.Drawable {
constructor() {
super();
this.hitTestResult = -1;
this._item = null;
this.points = [];
var centerX = 100;
var centerY = 100;
var size = 100;
var halfSize = size / 2;
this.points.add(lt.LeadPointD.create(centerX - halfSize, centerY - halfSize));
this.points.add(lt.LeadPointD.create(centerX + halfSize, centerY - halfSize));
this.points.add(lt.LeadPointD.create(centerX + halfSize, centerY + halfSize));
this.points.add(lt.LeadPointD.create(centerX - halfSize, centerY + halfSize));
}
draw(item, context, rect) {
context.save();
context.beginPath();
context.strokeStyle = "#FFF";
context.fillStyle = "yellow";
context.lineWidth = 2;
var index = 0;
var length = this.points.length;
var point;
point = this.points[0];
context.moveTo(point.x, point.y);
for (index = 1; index < length; index++) {
point = this.points[index];
context.lineTo(point.x, point.y);
}
context.lineTo(this.points[0].x, this.points[0].y);
context.stroke();
context.closePath();
for (index = 0; index < length; index++) {
context.beginPath();
point = this.points[index];
context.arc(point.x, point.y, 4, 0, 2 * Math.PI, false);
context.fill();
context.stroke();
}
context.restore();
}
get_visible() {
return true;
}
set_visible(value) {
}
hitTest(item, x, y) {
var index = 0;
var length = this.points.length;
var point;
for (index = 0; index < length; index++) {
point = this.points[index];
if (Math.max(Math.abs(point.x - x), Math.abs(point.y - y)) < 10) {
this.hitTestResult = index;
return true;
}
}
return false;
}
handleDragStarted(item, x, y, args) {
this._item = item;
this.hitTest(item, x, y);
}
handleDragDelta(x, y, args) {
if (this.hitTestResult != -1) {
this.points[this.hitTestResult] = lt.LeadPointD.create(x, y);
this._item.invalidate();
}
}
handleDragCompleted(x, y, args) {
}
handleDoubleTap(item, x, y, args) {
}
}
export class Drawable_Example {
constructor() {
this.run = (medicalViewer) => {
this.medicalViewer = medicalViewer;
var cell = this.medicalViewer.layout.cells.get_item(0);
cell.drawables["CustomDrawable"] = new customDrawable();
cell.invalidate();
};
this.viewerExample = new MedicalViewer_2D_Color_Example(this.run);
}
}
export class MedicalViewer_2D_Color_Example {
constructor(callback) {
// LEADTOOLS ImageViewer to be used with this example
this.medicalViewer = null;
// Generic state value used by the examples
this.timesClicked = 0;
// 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.medicalViewer = new lt.Controls.Medical.MedicalViewer(imageViewerDiv, 1, 1);
this.medicalViewer.onSizeChanged();
var cell = new lt.Controls.Medical.Cell(this.medicalViewer, this.medicalViewer.get_divId(), 1, 1);
// Set the show border to "true", to show a border around the cell.
cell.set_showFrameBorder(true);
// Add the cell to the viewer.
this.medicalViewer.layout.get_items().add(cell);
// [optional] Select the cell (it can also be selected by clicking on it.)
cell.set_selected(true);
// Now create a frame object which will hold the image inside the cell.
var cellFrame = new lt.Controls.Medical.Frame(cell);
// Add the frame to the cell class.
cell.get_frames().add(cellFrame);
// we are now going to to download an image from leadtools medical viewer demo web site, you need to change this to download images from your database.
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function (data) {
if (this.readyState == 4 && this.status == 200) {
// here we got the authentication Code that we need to retrieve the images from leadtools database.
var authenticationCode = encodeURIComponent(this.responseText);
// now, this is the MRTI info that contains the image information, width, height, tiles....etc.
var mrtiInfo = new lt.Controls.Medical.MRTIImage();
// The image dpi.
mrtiInfo.fullDpi = lt.LeadSizeD.create(150, 150);
// the tile size, recommended value is 256
mrtiInfo.tileSize = lt.LeadSizeD.create(1944, 1944);
mrtiInfo.frameIndex = 0;
// does this image support window level.
mrtiInfo.supportWindowLevel = true;
// different resolution for the image.
var resolutions = [{ "width": 1944, "height": 1944 }, { "width": 972, "height": 972 }, { "width": 486, "height": 486 }, { "width": 243, "height": 243 }, { "width": 121, "height": 121 }];
mrtiInfo.resolutions = [];
for (var i = 0; i < resolutions.length; i++) {
mrtiInfo.resolutions[i] = lt.LeadSizeD.create(resolutions[i].width, resolutions[i].height);
}
// the image width and height.
cellFrame.set_width(mrtiInfo.resolutions[0].width);
cellFrame.set_height(mrtiInfo.resolutions[0].height);
// the image full size.
mrtiInfo.fullSize = lt.LeadSizeD.create(cellFrame.get_width(), cellFrame.get_height());
// now we need the image URL,
var imageUri = "https://medicaldemos.leadtools.com/MedicalViewerServiceAsp22/api/retrieve";
imageUri += "/GetImageTile?auth=";
imageUri += authenticationCode;
// this the image instance UID, change this if you want to retrieve anything else.
imageUri += "&instance=1.2.840.114434.12387576.10100457.4075310.6503931";
mrtiInfo.imageUri = imageUri;
mrtiInfo.supportWindowLevel = false;
// set this info to the cell frame.
cellFrame.mrtiInfo = mrtiInfo;
// now we need to set the information for the image so we can do window level.
var imageInfo = new lt.Controls.Medical.DICOMImageInformation();
// set the image width and height.
imageInfo.width = 1944;
imageInfo.height = 1944;
// bits per pixel for the image
imageInfo.bitsPerPixel = 24;
// set these information to the frame.
cellFrame.set_information(imageInfo);
}
};
// We are trying here to get an image from the Leadtools database, we need to login and get the authentication code.
xhttp.open("POST", "https://medicaldemos.leadtools.com/MedicalViewerServiceAsp22/api/auth/AuthenticateUser", true);
xhttp.setRequestHeader('Content-Type', 'application/json; charset=UTF-8');
// we log in as a 'guest', after calling the below line, we will receive the authentication code sent via 'onreadystatechange' above.
xhttp.send(JSON.stringify({ userName: 'guest', password: 'guest', userData: '' }));
// 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.medicalViewer);
});
}
}
import { MedicalViewer_2D_Color_Example } from "../MedicalViewer_2D_Color_Example";
class customDrawable extends lt.Controls.Medical.Drawable {
constructor() {
super();
this.points = [];
var centerX = 100;
var centerY = 100;
var size = 100;
var halfSize = size / 2;
this.points.add(lt.LeadPointD.create(centerX - halfSize, centerY - halfSize));
this.points.add(lt.LeadPointD.create(centerX + halfSize, centerY - halfSize));
this.points.add(lt.LeadPointD.create(centerX + halfSize, centerY + halfSize));
this.points.add(lt.LeadPointD.create(centerX - halfSize, centerY + halfSize));
}
public draw(item: lt.Controls.ImageViewerItem, context: CanvasRenderingContext2D, rect: lt.LeadRectD): void {
context.save();
context.beginPath();
context.strokeStyle = "#FFF";
context.fillStyle = "yellow";
context.lineWidth = 2;
var index = 0;
var length = this.points.length;
var point: lt.LeadPointD;
point = this.points[0];
context.moveTo(point.x, point.y);
for (index = 1; index < length; index++) {
point = this.points[index];
context.lineTo(point.x, point.y);
}
context.lineTo(this.points[0].x, this.points[0].y);
context.stroke();
context.closePath();
for (index = 0; index < length; index++) {
context.beginPath();
point = this.points[index];
context.arc(point.x, point.y, 4, 0, 2 * Math.PI, false);
context.fill();
context.stroke();
}
context.restore();
}
private points: any;
public get_visible(): boolean {
return true;
}
public set_visible(value: boolean): void {
}
private hitTestResult = -1;
private _item = null;
public hitTest(item: lt.Controls.ImageViewerItem, x: number, y: number): boolean {
var index = 0;
var length = this.points.length;
var point: lt.LeadPointD;
for (index = 0; index < length; index++) {
point = this.points[index];
if (Math.max(Math.abs(point.x - x), Math.abs(point.y - y)) < 10) {
this.hitTestResult = index;
return true;
}
}
return false;
}
public handleDragStarted(item: lt.Controls.ImageViewerItem, x: number, y: number, args: lt.Controls.InteractiveDragStartedEventArgs): void {
this._item = item;
this.hitTest(item, x, y);
}
public handleDragDelta(x: number, y: number, args: lt.Controls.InteractiveDragDeltaEventArgs): void {
if (this.hitTestResult != -1) {
this.points[this.hitTestResult] = lt.LeadPointD.create(x, y);
this._item.invalidate();
}
}
// public handleDragCompleted(x: number, y: number, args: lt.Controls.InteractiveDragCompletedEventArgs): void {
// }
// public handleDoubleTap(item: lt.Controls.ImageViewerItem, x: number, y: number, args: DrawableEventArgs): void {
// }
}
export class Drawable_Example {
private viewerExample;
private medicalViewer;
constructor() {
this.viewerExample = new MedicalViewer_2D_Color_Example(this.run);
}
private run = (medicalViewer: lt.Controls.Medical.MedicalViewer) => {
this.medicalViewer = medicalViewer;
var cell: lt.Controls.Medical.Cell = this.medicalViewer.layout.cells.get_item(0);
cell.drawables["CustomDrawable"] = new customDrawable();
cell.invalidate(lt.LeadRectD.empty);
}
}
export class MedicalViewer_2D_Color_Example {
// LEADTOOLS ImageViewer to be used with this example
protected medicalViewer: lt.Controls.Medical.MedicalViewer = null;
// Generic state value used by the examples
public timesClicked: number = 0;
constructor(callback?: (medicalViewer: lt.Controls.Medical.MedicalViewer) => 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: HTMLDivElement = <HTMLDivElement>document.getElementById("imageViewerDiv");
const createOptions: lt.Controls.ImageViewerCreateOptions = new lt.Controls.ImageViewerCreateOptions(imageViewerDiv);
this.medicalViewer = new lt.Controls.Medical.MedicalViewer(imageViewerDiv, 1, 1);
this.medicalViewer.onSizeChanged();
var cell = new lt.Controls.Medical.Cell(this.medicalViewer, this.medicalViewer.get_divId(), 1, 1);
// Set the show border to "true", to show a border around the cell.
cell.set_showFrameBorder(true);
// Add the cell to the viewer.
this.medicalViewer.layout.get_items().add(cell);
// [optional] Select the cell (it can also be selected by clicking on it.)
cell.set_selected(true);
// Now create a frame object which will hold the image inside the cell.
var cellFrame = new lt.Controls.Medical.Frame(cell);
// Add the frame to the cell class.
cell.get_frames().add(cellFrame);
// we are now going to download an image from LEADTOOLS Medical Viewer demo web site, you need to change this to download images from your database.
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function (data) {
if (this.readyState == 4 && this.status == 200) {
// here we got the authentication Code that we need to retrieve the images from the LEADTOOLS database.
var authenticationCode = encodeURIComponent(this.responseText);
// now, this is the MRTI info that contains the image information, width, height, tiles....etc.
var mrtiInfo = new lt.Controls.Medical.MRTIImage();
// The image dpi.
mrtiInfo.fullDpi = lt.LeadSizeD.create(150, 150);
// the tile size, recommended value is 256
mrtiInfo.tileSize = lt.LeadSizeD.create(1944, 1944);
mrtiInfo.frameIndex = 0;
// does this image support window level?
mrtiInfo.supportWindowLevel = true;
// different resolution for the image.
var resolutions = [{ "width": 1944, "height": 1944 }, { "width": 972, "height": 972 }, { "width": 486, "height": 486 }, { "width": 243, "height": 243 }, { "width": 121, "height": 121 }];
mrtiInfo.resolutions = [];
for (var i = 0; i < resolutions.length; i++) {
mrtiInfo.resolutions[i] = lt.LeadSizeD.create(resolutions[i].width, resolutions[i].height);
}
// the image width and height.
cellFrame.set_width(mrtiInfo.resolutions[0].width);
cellFrame.set_height(mrtiInfo.resolutions[0].height);
// the image full size.
mrtiInfo.fullSize = lt.LeadSizeD.create(cellFrame.get_width(), cellFrame.get_height());
// now we need the image URL,
var imageUri = "https://medicaldemos.leadtools.com/MedicalViewerServiceAsp22/api/retrieve";
imageUri += "/GetImageTile?auth=";
imageUri += authenticationCode;
// this is the image instance UID, change this if you want to retrieve anything else.
imageUri += "&instance=1.2.840.114434.12387576.10100457.4075310.6503931";
mrtiInfo.imageUri = imageUri;
mrtiInfo.supportWindowLevel = false;
// set this info to the cell frame.
cellFrame.mrtiInfo = mrtiInfo;
// now we need to set the information for the image so we can do window level.
var imageInfo = new lt.Controls.Medical.DICOMImageInformation();
// set the image width and height.
imageInfo.width = 1944;
imageInfo.height = 1944;
// bits per pixel for the image
imageInfo.bitsPerPixel = 24;
// set these information to the frame.
cellFrame.set_information(imageInfo);
}
};
// We are trying to get an image from the LEADTOOLS database. We need to login and get the authentication code.
xhttp.open("POST", "https://medicaldemos.leadtools.com/MedicalViewerServiceAsp22/api/auth/AuthenticateUser", true);
xhttp.setRequestHeader('Content-Type', 'application/json; charset=UTF-8');
// we log in as a 'guest', after calling the below line, we will receive the authentication code sent via 'onreadystatechange' above.
xhttp.send(JSON.stringify({ userName: 'guest', password: 'guest', userData: '' }));
// 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.medicalViewer);
});
}
}
<!doctype html>
<html lang="en">
<title>Drawable Example</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>
<script src="../../LT/Leadtools.Controls.Medical.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 oncontextmenu="return false;">
<p>Check the rectangle with handles on the cell that is been created by overriding the drawable class. Click on one of the points and drag it around.</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.MedicalViewer.Drawable();
};
</script>
</html>
Help Collections
Raster .NET | C API | C++ Class Library | HTML5 JavaScript
Document .NET | C API | C++ Class Library | HTML5 JavaScript
Medical .NET | C API | C++ Class Library | HTML5 JavaScript
Medical Web Viewer .NET
Multimedia
Direct Show .NET | C API | Filters
Media Foundation .NET | C API | Transforms
Supported Platforms
.NET, Java, Android, and iOS/macOS Assemblies
Imaging, Medical, and Document
C API/C++ Class Libraries
Imaging, Medical, and Document
HTML5 JavaScript Libraries
Imaging, Medical, and Document