The Undo method in the UndoSystem class is responsible for performing an undo operation. It attempts to revert the last change made and returns a boolean value indicating whether the undo operation was successful.
The Undo method in the UndoSystem class is responsible for performing an undo operation. It attempts to revert the last change made and returns a boolean value indicating whether the undo operation was successful.
To use the Undo method, simply call it on an instance of the UndoSystem class. Ensure that there is at least one operation in the undo stack to revert; otherwise, the method will return false.
// Example of using the Undo method
var undoSystem = new UndoSystem();
// Perform some operations and add them to the undo stack
undoSystem.Insert("Change 1", () => { /* undo action */ }, () => { /* redo action */ });
undoSystem.Insert("Change 2", () => { /* undo action */ }, () => { /* redo action */ });
// Attempt to undo the last operation
bool success = undoSystem.Undo();
if (success)
{
// The undo was successful
// Handle successful undo
}
else
{
// No operations to undo
// Handle the case where undo is not possible
}