Using Pictures in Annotation Objects

The AnnPicture class provides a picture object that is used by several LEADTOOLS annotation object classes. The following LEADTOOLS annotation objects use the AnnPicture class:

Each of these classes (either through the direct implementation or inheritance) access properties that control how the AnnPicture is used in the annotation object.

AnnImageObject:

The AnnImageObject class derives from AnnRectangleObject and adds the Picture property to fill the object's Bounds.

AnnHotspotObject:

The AnnHotspotObject class derives from AnnImageObject and adds the DefaultPicture property to set the default AnnPicture used to fill the object's Bounds.

AnnFreehandHotspotObject:

The AnnFreehandHotspotObject class derives from AnnPolylineObject and adds both the Picture and DefaultPicture properties.

AnnPointObject:

The AnnPointObject class derives from AnnObject and adds both the Picture and DefaultPicture properties.

AnnStampObject: The AnnStampObject class derives from AnnTextObject and adds the Picture property.

AnnPicture from External PNG File or Data

The following examples will create an AnnStampObject with a picture stored in an external PNG file or data:

Using a .NET System.Drawing.Image object:

// This example will create a new stamp object at the specified bounds and with the picture data from the specified PNG 
// and add it to the container 
void CreateStampFromPngFile(AnnContainer container, LeadRectD bounds, Image pngImage) 
{ 
   // Create a new AnnStampObject 
   AnnStampObject stampObject = new AnnStampObject(); 
   // Set its bounds 
   stampObject.Rect = bounds; 
   // Set the picture from the PNG 
   AnnPicture picture = new AnnPicture(pngImage); 
   stampObject.Picture = picture; 
   // Add the stamp object to the container 
   container.Children.Add(stampObject); 
}

Using PNG data stored in a byte array:

// This example will create a new stamp object at the specified bounds and with the picture data from the specified PNG 
// and add it to the container 
void CreateStampFromPngFile(AnnContainer container, LeadRectD bounds, byte[] pngImage) 
{ 
   // Create a new AnnStampObject 
   AnnStampObject stampObject = new AnnStampObject(); 
   // Set its bounds 
   stampObject.Rect = bounds; 
   // Set the picture from the PNG 
   AnnPicture picture = new AnnPicture(pngImage); 
   stampObject.Picture = picture; 
   // Add the stamp object to the container 
   container.Children.Add(stampObject); 
}