points Property

Summary

Gets a list of the location points.

Syntax
TypeScript
JavaScript
Object.defineProperty(ImageViewerRubberBandEventArgs.prototype, 'points', 
	get: function() 
) 
points: LeadPointD[]; // read-only 

Property Value

The list of the location points.

Remarks

Note that if Shape is set to ImageViewerRubberBandShape.FreeHand, then Points can have any number of points including 1. When Shape is any other value, the number of points is always two (the first and second point).

Example
RubberBandInteractiveMode.ts
ImageViewer.ts
RubberBandInteractiveMode.js
ImageViewer.js
RubberBandInteractiveMode.html
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> 
Requirements

Target Platforms

Help Version 22.0.2023.2.4
Products | Support | Contact Us | Intellectual Property Notices
© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.

Leadtools.Controls Assembly

Products | Support | Contact Us | Intellectual Property Notices
© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.