workingCursor Property

Summary

Mouse cursor to use for the working state of this ImageViewerInteractiveMode.

Syntax
TypeScript
JavaScript
Object.defineProperty(ImageViewerInteractiveMode.prototype, 'workingCursor', 
	get: function(), 
	set: function(value) 
) 
workingCursor: string; 

Property Value

The mouse cursor to use for the working state of this ImageViewerInteractiveMode. The default value is null.

Remarks

IdleCursor and WorkingCursor are only used when this ImageViewerInteractiveMode is attached to the left mouse button and is enabled. It will not be used if this mode is attached to any other button or to touch. Mouse cursors are only supported by desktop browsers.

The values are standard HTML cursor strings. You can use a value like "crosshair" or "move". They will be set into the CSS style.cursor property of the HTML element. A value of null, means "do not change the cursor".

The cursors are set into the ImageViewer main div (ImageViewer.MainDiv) and foreground canvas (ImageViewer.ForeCanvas) elements when this interactive mode is assigned to the left mouse button. Also, the cursors will be set in any elements added by the user to the InteractiveService.UserControls collection.

IdleCursor will be set when the interactive mode is started (after Start is called) and removed when the mode is stopped (when Stop is called).

WorkingCursor will be set when the interactive mode is working (when OnWorkStarted is called) and removed (or set back to idle) when the interactive mode has stopped working (when OnWorkCompleted) is called).

These cursors can be used to provide visual clue into the current interactive mode operations. For instance, when using the ImageViewerPanZoomInteractiveMode interactive mode, you can set the IdleCursor to "crosshair" and the WorkingCursor to "move".

Example

Run the example. The cursor changes to a "crosshair" when it is on the surface of the viewer. When you click and drag, the cursor changes to "move".

WorkingCursor.ts
ImageViewer.ts
WorkingCursor.js
ImageViewer.js
WorkingCursor.html
import { ImageViewer_Example } from "../ImageViewer"; 
 
export class ImageViewerInteractiveMode_WorkingCursorExample { 
   private viewerExample; 
   constructor() { 
      this.viewerExample = new ImageViewer_Example(this.run); 
   } 
 
   private run = (viewer: lt.Controls.ImageViewer) => { 
      // Updates to cursors must be followed by a stop/start of the interactive modes (endUpdate) 
      // Note, you may need to close the browser's developer tools window and refresh before you can see changes to cursors. 
      viewer.interactiveModes.beginUpdate(); 
      const panZoom: lt.Controls.ImageViewerInteractiveMode = viewer.interactiveModes.findById(lt.Controls.ImageViewerInteractiveMode.panZoomModeId); 
      panZoom.idleCursor = "crosshair"; 
      panZoom.workingCursor = "move"; 
      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 ImageViewerInteractiveMode_WorkingCursorExample { 
   viewerExample; 
   constructor() { 
      this.viewerExample = new ImageViewer_Example(this.run); 
   } 
 
   run = (viewer) => { 
      // Updates to cursors must be followed by a stop/start of the interactive modes (endUpdate) 
      // Note, you may need to close the browser's developer tools window and refresh before you can see changes to cursors. 
      viewer.interactiveModes.beginUpdate(); 
      const panZoom = viewer.interactiveModes.findById(lt.Controls.ImageViewerInteractiveMode.panZoomModeId); 
      panZoom.idleCursor = "crosshair"; 
      panZoom.workingCursor = "move"; 
      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 | WorkingCursor</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.WorkingCursor(); 
 
   }; 
</script> 
</html> 
Requirements

Target Platforms

Help Version 22.0.2022.4.4
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© 1991-2022 LEAD Technologies, Inc. All Rights Reserved.

Leadtools.Controls Assembly

Products | Support | Contact Us | Intellectual Property Notices
© 1991-2022 LEAD Technologies, Inc. All Rights Reserved.