Class TUndoSetAngle

Properties

Unit

Declaration

type TUndoSetAngle = class(TCustomUndo)

Description

TUndoSetAngle is used to set the grid angle.

Hierarchy

TObject
TUndoItem
TCustomUndo
TUndoSetAngle

Overview

Fields

	`FNewAngle: real;`
	`FOldAngle: real;`
	`FOldColumns: TOneDRealArray;`
	`FOldRows: TOneDRealArray;`

Methods

	`function Description: string; override;`
	`constructor Create(const Angle: real);`
	`procedure DoCommand; override;`
	`procedure Undo; override;`

Description

Fields

	`FNewAngle: real;`
`FNewAngle`: real; `FNewAngle` is the new grid angle in radians.

	`FOldAngle: real;`
`FOldAngle`: real; `FOldAngle` is the old grid angle in radians.

	`FOldColumns: TOneDRealArray;`
`FOldColumns`: TOneDRealArray; `FOldColumns` is the column positions before changing the grid angle.

	`FOldRows: TOneDRealArray;`
`FOldRows`: TOneDRealArray; `FOldRows` is the row positions before changing the grid angle.

Methods

	`function Description: string; override;`
See TCustomUndo.Description.

constructor Create(const Angle: real);

Create creates an instance of TUndoSetAngle.

Parameters

Angle: is the new grid angle.

	`procedure DoCommand; override;`
`DoCommand` rotates the grid.

	`procedure Undo; override;`
`Undo` restores the grid to its previous angle.

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