size Property

Summary

Size of the item.

Syntax
TypeScript
JavaScript
Object.defineProperty(ImageViewerItem.prototype, 'size', 
	get: function(), 
	set: function(value) 
) 
size: LeadSizeD; 

Property Value

The size of the entire item, including any margins, borders, and padding. The default value is 0,0.

Remarks

For more information, refer to Image Viewer Items.

Example

This example adds items to the viewer with differing sizes but similar images. The images are fit to the size of the item.

Size.ts
ImageViewer.ts
Size.js
ImageViewer.js
Size.html
import { ImageViewer_Example } from "../ImageViewer"; 
 
export class ImageViewerItem_SizeExample { 
   private viewerExample; 
   constructor() { 
      this.viewerExample = new ImageViewer_Example(this.run); 
   } 
 
   private run = (viewer: lt.Controls.ImageViewer) => { 
      // Add some styles 
      viewer.items.clear(); 
      viewer.viewLayout = new lt.Controls.ImageViewerVerticalViewLayout(); 
      viewer.itemMargin = lt.Controls.ControlPadding.createAll(10); 
      viewer.itemBorderThickness = 5; 
      viewer.itemPadding = lt.Controls.ControlPadding.createAll(20); 
 
      // Create our item sizes 
      const sizes: lt.LeadSizeD[] = [ 
         lt.LeadSizeD.create(200, 100), 
         lt.LeadSizeD.create(100, 200), 
         lt.LeadSizeD.create(200, 300), 
         lt.LeadSizeD.create(300, 200), 
      ]; 
 
      // By default, fit each image to its item 
      viewer.itemSizeMode = lt.Controls.ControlSizeMode.fit; 
 
      // We'll create images from this canvas 
      const canvas = document.createElement("canvas") as HTMLCanvasElement; 
      canvas.width = 400; 
      canvas.height = 400; 
      const ctx: CanvasRenderingContext2D = canvas.getContext("2d"); 
      ctx.font = "bold 50px Times New Roman"; 
 
      sizes.forEach((size, i) => { 
         // Add the background and item text 
         ctx.fillStyle = "white"; 
         ctx.fillRect(0, 0, 400, 400); 
         ctx.fillStyle = "black"; 
         ctx.fillText("Item " + i, 50, 50); 
 
         // Create an image from the canvas 
         const image = document.createElement("img"); 
         image.onload = () => { 
 
            // Create a new item to add 
            const item: lt.Controls.ImageViewerItem = new lt.Controls.ImageViewerItem(); 
            item.text = "Item" + i; 
            item.image = image; 
            // Set the size to be the size from the array 
            item.size = size; 
            viewer.items.add(item); 
         } 
         image.src = canvas.toDataURL("image/png"); 
      }); 
   } 
} 
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/v200/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 ImageViewerItem_SizeExample { 
   viewerExample; 
   constructor() { 
      this.viewerExample = new ImageViewer_Example(this.run); 
   } 
 
   run = (viewer) => { 
      // Add some styles 
      viewer.items.clear(); 
      viewer.viewLayout = new lt.Controls.ImageViewerVerticalViewLayout(); 
      viewer.itemMargin = lt.Controls.ControlPadding.createAll(10); 
      viewer.itemBorderThickness = 5; 
      viewer.itemPadding = lt.Controls.ControlPadding.createAll(20); 
 
      // Create our item sizes 
      const sizes = [ 
         lt.LeadSizeD.create(200, 100), 
         lt.LeadSizeD.create(100, 200), 
         lt.LeadSizeD.create(200, 300), 
         lt.LeadSizeD.create(300, 200), 
      ]; 
 
      // By default, fit each image to its item 
      viewer.itemSizeMode = lt.Controls.ControlSizeMode.fit; 
 
      // We'll create images from this canvas 
      const canvas = document.createElement("canvas"); 
      canvas.width = 400; 
      canvas.height = 400; 
      const ctx = canvas.getContext("2d"); 
      ctx.font = "bold 50px Times New Roman"; 
 
      sizes.forEach((size, i) => { 
         // Add the background and item text 
         ctx.fillStyle = "white"; 
         ctx.fillRect(0, 0, 400, 400); 
         ctx.fillStyle = "black"; 
         ctx.fillText("Item " + i, 50, 50); 
 
         // Create an image from the canvas 
         const image = document.createElement("img"); 
         image.onload = () => { 
 
            // Create a new item to add 
            const item = new lt.Controls.ImageViewerItem(); 
            item.text = "Item" + i; 
            item.image = image; 
            // Set the size to be the size from the array 
            item.size = size; 
            viewer.items.add(item); 
         } 
         image.src = canvas.toDataURL("image/png"); 
      }); 
   } 
} 
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/v200/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 | Size</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.ImageViewerItem.Size(); 
 
   }; 
</script> 
</html> 

Requirements

Target Platforms

Help Version 20.0.2020.2.17
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Leadtools.Controls Assembly