isHoverEnabled Property

Summary

Indicates of this mode will update the IsHovered state while working.

Syntax
TypeScript
JavaScript
Object.defineProperty(ImageViewerActiveItemInteractiveMode.prototype, 'isHoverEnabled', 
	get: function(), 
	set: function(value) 
) 
isHoverEnabled: boolean; 

Property Value

true to update the IsHovered state while working, otherwise; false. Default value is false.

Remarks

If the value of IsHoverEnabled is set to true, then moving the mouse over an item will change its IsHovered to true, moving the mouse away from the item sets it back to false. If you changed the image viewer appearance to have different styles for hovered item then the UI will give indication of this operation. For more information refer to Image Viewer Appearance.

Example
ActiveItemInteractiveMode.ts
ImageViewer.ts
ActiveItemInteractiveMode.js
ImageViewer.js
ActiveItemInteractiveMode.html
import { ImageViewer_Example } from "../ImageViewer"; 
 
export class ImageViewer_ActiveItemInteractiveModeExample { 
   private viewerExample; 
   constructor() { 
      this.viewerExample = new ImageViewer_Example(this.run); 
   } 
 
   private run = (viewer: lt.Controls.ImageViewer) => { 
      // Clear all the images already the viewer 
      viewer.items.clear(); 
      // Use vertical view layout 
      viewer.viewLayout = new lt.Controls.ImageViewerVerticalViewLayout(); 
      // Make sure the item size is larger than the image size (thumbnails mode) 
      viewer.itemBorderThickness = 3; 
      viewer.itemMargin = lt.Controls.ControlPadding.createAll(5); 
      viewer.itemPadding = lt.Controls.ControlPadding.createAll(20); 
      // Change the active item background color 
      viewer.activeItemBorderColor = "forestgreen"; 
 
      // Add 4 items to the viewer 
      for (let index = 0; index < 4; index++) { 
         const item: lt.Controls.ImageViewerItem = new lt.Controls.ImageViewerItem(); 
         item.text = "Item " + index; 
         item.url = "https://demo.leadtools.com/images/jpeg/cannon.jpg"; 
         viewer.items.add(item); 
      } 
 
      // Insert the Active Item mode before the current PanZoom mode 
      const activeItemMode: lt.Controls.ImageViewerActiveItemInteractiveMode = new lt.Controls.ImageViewerActiveItemInteractiveMode(); 
      viewer.interactiveModes.insert(0, activeItemMode); 
 
      const output = document.getElementById("output"); 
 
      // Hook to the ActiveItemChanged event and update the label 
      const updateActiveItem = () => { 
         const index: number = viewer.items.indexOf(viewer.activeItem); 
         output.innerHTML = "Active item index: " + index; 
      } 
      viewer.activeItemChanged.add(updateActiveItem); 
      updateActiveItem(); 
   } 
} 
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_ActiveItemInteractiveModeExample { 
   viewerExample; 
   constructor() { 
      this.viewerExample = new ImageViewer_Example(this.run); 
   } 
 
   run = (viewer) => { 
      // Clear all the images already the viewer 
      viewer.items.clear(); 
      // Use vertical view layout 
      viewer.viewLayout = new lt.Controls.ImageViewerVerticalViewLayout(); 
      // Make sure the item size is larger than the image size (thumbnails mode) 
      viewer.itemBorderThickness = 3; 
      viewer.itemMargin = lt.Controls.ControlPadding.createAll(5); 
      viewer.itemPadding = lt.Controls.ControlPadding.createAll(20); 
      // Change the active item background color 
      viewer.activeItemBorderColor = "forestgreen"; 
 
      // Add 4 items to the viewer 
      for (let index = 0; index < 4; index++) { 
         const item = new lt.Controls.ImageViewerItem(); 
         item.text = "Item " + index; 
         item.url = "https://demo.leadtools.com/images/jpeg/cannon.jpg"; 
         viewer.items.add(item); 
      } 
 
      // Insert the Active Item mode before the current PanZoom mode 
      const activeItemMode = new lt.Controls.ImageViewerActiveItemInteractiveMode(); 
      viewer.interactiveModes.insert(0, activeItemMode); 
 
      const output = document.getElementById("output"); 
 
      // Hook to the ActiveItemChanged event and update the label 
      const updateActiveItem = () => { 
         const index = viewer.items.indexOf(viewer.activeItem); 
         output.innerHTML = "Active item index: " + index; 
      } 
      viewer.activeItemChanged.add(updateActiveItem); 
      updateActiveItem(); 
   } 
} 
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 | ActiveItemInteractiveMode</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.ActiveItemInteractiveMode(); 
 
   }; 
</script> 
</html> 
Requirements

Target Platforms

Help Version 22.0.2023.2.4
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© 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.