Libraries.Interface.Undo.Edit Documentation

Edit is a class for controlling undoing and redoing actions inside of a user interface or game. Each Edit is expected to store and manage its own state. The names, RedoName and UndoName are presentation names for the class, which can be used in an interface for the user.

Example Code

use Libraries.Interface.Undo.Edit
Edit edit
edit:Undo()

Inherits from: Libraries.Language.Object

Actions Documentation

CanRedo()

This action detects whether an operation can be redone and returns true if it can. By default, not overriding this action means the answer will always be true.

Return

boolean:

Example

use Libraries.Interface.Undo.Edit
Edit edit
output edit:CanRedo()

CanUndo()

This action detects whether an operation can be undone and returns true if it can. By default, not overriding this action means the answer will always be true.

Return

boolean:

Example

use Libraries.Interface.Undo.Edit
Edit edit
output edit:CanUndo()

Compare(Libraries.Language.Object object)

This action compares two object hash codes and returns an integer. The result is larger if this hash code is larger than the object passed as a parameter, smaller, or equal. In this case, -1 means smaller, 0 means equal, and 1 means larger. This action was changed in Quorum 7 to return an integer, instead of a CompareResult object, because the previous implementation was causing efficiency issues.

Parameters

Return

integer: The Compare result, Smaller, Equal, or Larger.

Example

Object o
Object t
integer result = o:Compare(t) //1 (larger), 0 (equal), or -1 (smaller)

Dispose()

This action tells this Edit to free up any state it is holding, if any.

Example

use Libraries.Interface.Undo.Edit
Edit edit
edit:Dispose()

Equals(Libraries.Language.Object object)

This action determines if two objects are equal based on their hash code values.

Parameters

Return

boolean: True if the hash codes are equal and false if they are not equal.

Example

use Libraries.Language.Object
use Libraries.Language.Types.Text
Object o
Text t
boolean result = o:Equals(t)

GetHashCode()

This action gets the hash code for an object.

Return

integer: The integer hash code of the object.

Example

Object o
integer hash = o:GetHashCode()

GetRedoName()

This action returns the presentation name for redoing this operation.

Return

text:

Example

use Libraries.Interface.Undo.Edit
Edit edit
output edit:GetRedoName()

GetUndoName()

This action returns the presentation name for undoing this operation.

Return

text:

Example

use Libraries.Interface.Undo.Edit
Edit edit
output edit:GetUndoName()

Redo()

This action redoes an operation.

Example

use Libraries.Interface.Undo.Edit
Edit edit
edit:Redo()

Undo()

This action undoes an operation.

Example

use Libraries.Interface.Undo.Edit
Edit edit
edit:Undo()