ComPDFKitViewer.Helper Namespace

bitmap struct converter

DPI Helper

Undo/Redo Manager class

IHistory

HistoryAction

Undo/Redo Manager class, the usage method is as follows: First get the singleton through the GetCurrent method, Then call the AddHistory method of the singleton to add a history record (the parameter is an object that implements the History (undo/redo method) interface) Then call the Undo/Redo method of UndoManager