LEADTOOLS provides several methods for manipulating annotation objects so they are flipped, reversed, or rotated.
Use the LAnnotation::Flip function to flip one or more annotation objects, top to bottom. Objects that contain text cannot be flipped or reversed. If one or more such objects is in a group of objects that is flipped or reversed on a common axis, the text will move to the new position, but will retain its orientation.
Use the LAnnotation::Reverse function to reverse one or more annotation objects, left to right. Objects that contain text cannot be flipped or reversed. If one or more such objects is in a group of objects that is flipped or reversed on a common axis, the text will move to the new position, but will retain its orientation.
Use the LAnnotation::Rotate function to rotate one or more annotation objects.
The LAnnotation::GetRotateOptions and the LAnnotation::SetRotateOptions functions are used to control the interface used for performing rotations. Enable these functions by calling the LAnnotation::SetOptions function and passing OPTIONS_NEW_ROTATE. For more information, refer to Annotation Features.
Certain objects cannot be rotated (see the following list). If one or more such objects are in a group of objects that is rotated around a common center, those objects will move to new positions, but will retain their orientation.
Flipping and Reversing:
All annotation objects flip or reverse with the following notes:
ANN_OBJECT_AUDIO - metafile does not flip/reverse
ANN_OBJECT_BUTTON - text itself does not flip/reverse
ANN_OBJECT_ENCRYPT - metafile does not flip/reverse
ANN_OBJECT_FREEHANDHOTSPOT -- metafile does not flip/reverse
ANN_OBJECT_HOTSPOT - metafile does not flip/reverse
ANN_OBJECT_NOTE - text itself does not flip/reverse
ANN_OBJECT_POINT - if the point uses an image, the image does not flip/reverse
ANN_OBJECT_PUSHPIN - text itself does not flip/reverse
ANN_OBJECT_RTF - text itself does not flip/reverse
ANN_OBJECT_STAMP the text flips/reverses, but the image and metafile do not flip/reverse
ANN_OBJECT_TEXT - text itself does not flip/reverse
ANN_OBJECT_TEXTPOINTER - the tail flips, but the text does not flip/reverse
ANN_OBJECT_VIDEO - metafile does not flip/reverse
Rotating:
All objects rotate EXCEPT for the following objects:
ANN_OBJECT_AUDIO
ANN_OBJECT_BUTTON
ANN_OBJECT_ENCRYPT
ANN_OBJECT_FREEHANDHOTSPOT the object rotates, but not the metafile
ANN_OBJECT_HOTSPOT
ANN_OBJECT_NOTE
ANN_OBJECT_POINT
ANN_OBJECT_PUSHPIN
ANN_OBJECT_RTF
ANN_OBJECT_TEXTPOINTER
ANN_OBJECT_VIDEO
Help Collections
Raster .NET | C API | C++ Class Library | HTML5 JavaScript
Document .NET | C API | C++ Class Library | HTML5 JavaScript
Medical .NET | C API | C++ Class Library | HTML5 JavaScript
Medical Web Viewer .NET
Multimedia
Direct Show .NET | C API | Filters
Media Foundation .NET | C API | Transforms
Supported Platforms
.NET, Java, Android, and iOS/macOS Assemblies
Imaging, Medical, and Document
C API/C++ Class Libraries
Imaging, Medical, and Document
HTML5 JavaScript Libraries
Imaging, Medical, and Document