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ImageDropShadow Property

Summary

Image's drop shadow properties.

Syntax
C#
C++/CLI
public ControlDropShadowOptions ImageDropShadow { get; set; } 
public:  
   property ControlDropShadowOptions^ ImageDropShadow 
   { 
      ControlDropShadowOptions^ get() 
      void set(ControlDropShadowOptions^ value) 
   } 

Property Value

The images drop shadow properties. Default value is the return value from ControlDropShadowOptions.CreateDefault (invisible drop shadow).

Remarks

For more information, refer to Image Viewer Appearance.

Example

Run the demo, click the Example and the code will trigger drop shadow between view, image and none.

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:

C#
using Leadtools; 
using Leadtools.Controls; 
using Leadtools.Codecs; 
using Leadtools.Drawing; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
 
 
public ImageViewerForm _form = new ImageViewerForm(); 
public ComboBox comboBox = new ComboBox(); 
public ImageViewer _imageViewer; 
 
public void ImageViewerDropShadowExample() 
{ 
   // Get the Form's ImageViewer control 
   _imageViewer = _form.ImageViewer; 
   // Clear all the images already the viewer 
   _imageViewer.Items.Clear(); 
   // Use vertical view layout 
   _imageViewer.ViewLayout = new ImageViewerVerticalViewLayout(); 
   // Make sure the item size is larger than the image size (thumbnails mode) 
   _imageViewer.ItemSize = LeadSize.Create(200, 200); 
 
   // Add 4 items to the viewer 
   using (var codecs = new RasterCodecs()) 
   { 
      for (var page = 1; page <= 4; page++) 
      { 
         var item = new ImageViewerItem(); 
         var fileName = Path.Combine(LEAD_VARS.ImagesDir, string.Format("ocr{0}.tif", page)); 
 
         // Create a thumbnail from the image 
         using (var image = codecs.Load(fileName, page)) 
         { 
            item.Image = image.CreateThumbnail(180, 180, 24, RasterViewPerspective.TopLeft, RasterSizeFlags.Resample); 
         } 
         _imageViewer.Items.Add(item); 
      } 
   } 
 
   // Add view margin and item padding. The drop shadow are rendered inside these paddings 
   _imageViewer.ViewMargin = new Padding(20); 
   _imageViewer.ItemPadding = new Padding(20); 
   // Add a border style for both 
   _imageViewer.ImageBorderThickness = 1; 
   _imageViewer.ViewBorderThickness = 1; 
 
   // Add a combo box control to show the drop shadow modes 
   comboBox.Top = _form.ClientRectangle.Top; 
   _form.Controls.Add(comboBox); 
 
   // Add an entry for each drop shadow mode to the combo box 
   comboBox.Items.Add("No drop shadow"); 
   comboBox.Items.Add("View drop shadow"); 
   comboBox.Items.Add("Image drop shadow"); 
 
   comboBox.BringToFront(); 
 
   // User selects a drop shadow from the comboBox 
   comboBox.SelectedIndexChanged += ComboBox_SelectedIndexChanged; 
} 
 
private void ComboBox_SelectedIndexChanged(object sender, EventArgs e) 
{ 
   ComboBox comboBox = sender as ComboBox; 
   ControlDropShadowOptions dropShadowOptions; 
 
   // Clear previous view drop shadow 
   dropShadowOptions = _imageViewer.ViewDropShadow; 
   dropShadowOptions.IsVisible = false; 
   _imageViewer.ViewDropShadow = dropShadowOptions; 
 
   // Clear previous image drop shadow 
   dropShadowOptions = _imageViewer.ImageDropShadow; 
   dropShadowOptions.IsVisible = false; 
   _imageViewer.ImageDropShadow = dropShadowOptions; 
 
   switch (comboBox.SelectedItem.ToString()) 
   { 
      case "View drop shadow": 
         dropShadowOptions = _imageViewer.ViewDropShadow; 
         dropShadowOptions.Blur = 0; 
         dropShadowOptions.OffsetX = 10; 
         dropShadowOptions.OffsetY = 10; 
         dropShadowOptions.IsVisible = true; 
         _imageViewer.ViewDropShadow = dropShadowOptions; 
         break; 
      case "Image drop shadow": 
         dropShadowOptions = _imageViewer.ImageDropShadow; 
         dropShadowOptions.IsVisible = true; 
         _imageViewer.ImageDropShadow = dropShadowOptions; 
         break; 
      case "No drop shadow": 
      default: 
         break; 
   } 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
} 
Requirements

Target Platforms

Help Version 23.0.2024.2.29
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© 1991-2024 LEAD Technologies, Inc. All Rights Reserved.

Leadtools.Controls Assembly
Products | Support | Contact Us | Intellectual Property Notices
© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.