imageDropShadow Property

Summary

The Image's drop shadow properties.

Syntax
TypeScript
JavaScript
Object.defineProperty(ImageViewer.prototype, 'imageDropShadow', 
	get: function(), 
	set: function(value) 
) 
imageDropShadow: ControlDropShadowOptions; 

Property Value

The image's drop shadow properties. The default value is the return value from ControlDropShadowOptions.CreateDefault (invisible drop shadow).

Remarks

For more information, refer to Image Viewer Appearance.

Example

By clicking the button in this example, the imageViewer will rotate between a view drop shadow, image drop shadow, and no drop shadow.

DropShadow.ts
ImageViewer.ts
DropShadow.js
ImageViewer.js
DropShadow.html
import { ImageViewer_Example } from "../ImageViewer"; 
 
export class ImageViewer_DropShadowExample { 
   private viewerExample; 
   constructor() { 
      this.viewerExample = new ImageViewer_Example(this.run); 
   } 
 
   private run = (viewer: lt.Controls.ImageViewer) => { 
      if (this.viewerExample.timesClicked === 1) { 
         // Add view margin and item padding. The drop shadow is rendered inside the padding. 
         viewer.viewMargin = lt.Controls.ControlPadding.createAll(20); 
         viewer.itemPadding = lt.Controls.ControlPadding.createAll(20); 
 
         // Add a border style for both 
         viewer.imageBorderThickness = 1; 
         viewer.viewBorderThickness = 1; 
      } 
 
      // Based on the number of times clicked, change the visibility 
      const mod: number = this.viewerExample.timesClicked % 3; 
      let text: string = null; 
      let viewVisible: boolean = false; 
      let imageVisible: boolean = false; 
      switch (mod) { 
         case 1: 
            viewVisible = true; 
            imageVisible = false; 
            text = "View Drop Shadow"; 
            break; 
         case 2: 
            viewVisible = false; 
            imageVisible = true; 
            text = "Image Drop Shadow"; 
            break; 
         default: 
            viewVisible = false; 
            imageVisible = false; 
            text = "None"; 
            break; 
      } 
      // Set the visibility 
      const viewDropShadow: lt.Controls.ControlDropShadowOptions = viewer.viewDropShadow; 
      viewDropShadow.isVisible = viewVisible; 
      viewer.viewDropShadow = viewDropShadow; 
      const imageDropShadow: lt.Controls.ControlDropShadowOptions = viewer.imageDropShadow; 
      imageDropShadow.isVisible = imageVisible; 
      viewer.imageDropShadow = imageDropShadow; 
 
      const output = document.getElementById("output"); 
      output.innerHTML = text; 
   } 
} 
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_DropShadowExample { 
   viewerExample; 
   constructor() { 
      this.viewerExample = new ImageViewer_Example(this.run); 
   } 
 
   run = (viewer) => { 
      if (this.viewerExample.timesClicked === 1) { 
         // Add view margin and item padding. The drop shadow is rendered inside the padding. 
         viewer.viewMargin = lt.Controls.ControlPadding.createAll(20); 
         viewer.itemPadding = lt.Controls.ControlPadding.createAll(20); 
 
         // Add a border style for both 
         viewer.imageBorderThickness = 1; 
         viewer.viewBorderThickness = 1; 
      } 
 
      // Based on the number of times clicked, change the visibility 
      const mod = this.viewerExample.timesClicked % 3; 
      let text = null; 
      let viewVisible = false; 
      let imageVisible = false; 
      switch (mod) { 
         case 1: 
            viewVisible = true; 
            imageVisible = false; 
            text = "View Drop Shadow"; 
            break; 
         case 2: 
            viewVisible = false; 
            imageVisible = true; 
            text = "Image Drop Shadow"; 
            break; 
         default: 
            viewVisible = false; 
            imageVisible = false; 
            text = "None"; 
            break; 
      } 
      // Set the visibility 
      const viewDropShadow = viewer.viewDropShadow; 
      viewDropShadow.isVisible = viewVisible; 
      viewer.viewDropShadow = viewDropShadow; 
      const imageDropShadow = viewer.imageDropShadow; 
      imageDropShadow.isVisible = imageVisible; 
      viewer.imageDropShadow = imageDropShadow; 
 
      const output = document.getElementById("output"); 
      output.innerHTML = text; 
   } 
} 
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 | DropShadow</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.DropShadow(); 
 
   }; 
</script> 
</html> 
Requirements

Target Platforms

Help Version 22.0.2021.9.24
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Leadtools.Controls Assembly
Products | Support | Contact Us | Intellectual Property Notices
© 1991-2021 LEAD Technologies, Inc. All Rights Reserved.