Using Pictures in Annotation Objects (original) (raw)

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:

AnnImageObject

AnnHotspotObject

AnnFreehandHotspotObject

AnnPointObject

AnnStampObject

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:
  C#
  // 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:
  C#
  // 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);
}