ItemDragDrop Event

Summary

Occurs when data is being dragged or dropped from/to this ImageViewer.

Syntax

C++/CLI

public event EventHandler<ImageViewerItemDragDropEventArgs> ItemDragDrop

public:  
   event EventHandler<Leadtools::Controls::ImageViewerItemDragDropEventArgs^>^ ItemDragDrop

Remarks

For more information refer to Image Viewer Drag and Drop.

Example

using Leadtools; 
using Leadtools.Controls; 
using Leadtools.Codecs; 
using Leadtools.Drawing; 
 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
 
public void ImageViewerDragInteractiveModeExample() 
{ 
   _imageViewer.ItemDragDrop += (sender, e) => 
   { 
      _imageViewer.InteractiveModes.BeginUpdate(); 
      e.Effect = DragDropEffects.Copy | DragDropEffects.Move | DragDropEffects.Link; 
      Debug.WriteLine("Format: {0}, Location: {1}, NativeEvent: {2}, Operation: {3}, SourceImageViewer: {4}, SourceItem: {5}, TargetImageViewer: {6}, TargetItem: {7}",  
         e.Format, e.Location, e.NativeEvent, e.Operation, e.SourceImageViewer, e.SourceItem, e.TargetImageViewer, e.TargetItem); 
      _imageViewer.InteractiveModes.EndUpdate(); 
      e.Abort = true; 
   }; 
   _imageViewer.InteractiveModes.BeginUpdate(); 
   ImageViewerDragInteractiveMode dragMode = new ImageViewerDragInteractiveMode(); 
   dragMode.Format = RasterImage.RasterImageDataFormat; 
   dragMode.TargetImageViewerMode = ImageViewerDragTargetMode.All; 
   dragMode.AllowedEffects = DragDropEffects.Copy | DragDropEffects.Move | DragDropEffects.Link; 
   _imageViewer.InteractiveModes.Add(dragMode); 
   _imageViewer.InteractiveModes.EndUpdate(); 
}

This example will show how to use the ImageViewer as the drop target of a drag/drop operation.

Start with the ImageViewer example, remove all the code inside the example function (search for the "// TODO: add example code here" comment) and insert the following code:

Event Data

Parameter	Type	Description
sender	object	The source of the event.
e	ImageViewerItemDragDropEventArgs	The event data.

Requirements

Target Platforms

Reference

ImageViewer Class

ImageViewer Members

Leadtools.Controls Namespace

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Help Version 23.0.2024.2.29

Leadtools.Controls Assembly

Introduction

Getting Started

Namespaces

Leadtools.Controls Namespace

Assemblies