Class TCustomUndo

Fields

Properties

Unit

Declaration

type TCustomUndo = class(TUndoItem)

Description

TCustomUndo is an abstract base class used as an ancestor of all TUndoItems in ModelMuse.

Hierarchy

TObject
TUndoItem
TCustomUndo

Overview

Methods

	`function Description: string; virtual; abstract;`
	`function GetUndoDescription: string; override;`
	`function GetShortUndoDescription: string; override;`
	`function GetRedoDescription: string; override;`
	`function GetShortRedoDescription: string; override;`
	`function GetUndoMenuText: string; override;`
	`function GetRedoMenuText: string; override;`
	`procedure InvalidateGrid;`
	`procedure DisallowChildGridUpdates;`
	`procedure AllowChildGridUpdates;`
	`procedure Redo; override;`

Description

Methods

	`function Description: string; virtual; abstract;`
`Description` provides a single description of the item which is then used in other GetUndoDescription, GetUndoDescription, GetShortUndoDescription, GetRedoDescription, GetShortRedoDescription, GetUndoMenuText, and GetRedoMenuText.

	`function GetUndoDescription: string; override;`
`GetUndoDescription` returns 'Undo ' + Description.

	`function GetShortUndoDescription: string; override;`
`GetShortUndoDescription` returns 'Undo ' + Description.

	`function GetRedoDescription: string; override;`
`GetRedoDescription` returns 'Redo ' + Description.

	`function GetShortRedoDescription: string; override;`
`GetShortRedoDescription` returns 'Redo ' + Description.

	`function GetUndoMenuText: string; override;`
`GetUndoMenuText` returns UndoDescription

	`function GetRedoMenuText: string; override;`
`GetRedoMenuText` returns RedoDescription

	`procedure InvalidateGrid;`
`InvalidateGrid` tells the model that the grid has changed and that related things need to be updated.

	`procedure DisallowChildGridUpdates;`

	`procedure AllowChildGridUpdates;`

	`procedure Redo; override;`
`Redo` calls DoCommand.

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