Reference TMemo

  TMemo = class(TWidget)
  protected
    function AutoSize: Boolean; override;
    function CanSelect: Boolean; override;
    procedure Resize; override;
    procedure DoKeyDown(var Args: TSceneKeyArgs); override;
    procedure DoKeyUp(var Args: TSceneKeyArgs); override;
    procedure DoTextInput(var Args: TSceneTextArgs); override;
    procedure DoMouseDown(var Args: TSceneMouseArgs); override;
    procedure DoMouseMove(var Args: TSceneMouseArgs); override;
    procedure DoMouseUp(var Args: TSceneMouseArgs); override;
    procedure DoMouseWheel(var Args: TSceneWheelArgs); override;
  public
    constructor Create(Parent: TWidget; const Name: string = ''); override;
    destructor Destroy; override;
    { Select all of the text }
    procedure SelectAll;
    { Copy the selected text to the clipboard }
    procedure CopyToClipboard;
    { Copy the selected text to the clipboard and remove it }
    procedure CutToClipboard;
    { Replace the selected text with the text on the clipboard }
    procedure PasteFromClipboard;
    { The methods below are used by themes to draw the memo. Rectangles are
      relative to the top left of the memo. Themes call Prepare first. }
    procedure Prepare;
    { The area holding the text, inside the padding and scroll bars }
    function TextArea: TRectF;
    { True if a scroll bar is showing }
    function BarVisible(Bar: TMemoBar): Boolean;
    { The rectangle of a scroll bar }
    function BarRect(Bar: TMemoBar): TRectF;
    { The rectangle of the thumb of a scroll bar }
    function ThumbRect(Bar: TMemoBar): TRectF;
    { The number of rows, which is more than the number of lines when lines wrap }
    function RowCount: Integer;
    { The text of a row }
    function RowText(Row: Integer): string;
    { Returns True if any of the row is selected, giving the left and right of
      the selection measured from the start of the row }
    function RowSelection(Row: Integer; out Left, Right: Float): Boolean;
    { The top of the caret measured from the top left of the unscrolled text }
    function CaretPoint: TPointF;
    { Returns True when the caret should be drawn in the current blink }
    function CaretVisible: Boolean;
    { The height of a row }
    property RowHeight: Float read FRowHeight;
    { The number of pixels the text is scrolled left and up }
    property ScrollX: Float read FScrollX;
    property ScrollY: Float read FScrollY;
    { The position of the caret }
    property Caret: Integer read FCaret;
    { The position where the selection begins }
    property SelStart: Integer read GetSelStart;
    { The number of bytes selected }
    property SelLength: Integer read GetSelLength;
    { The selected text }
    property SelText: string read GetSelText;
    { The text of the memo as a list of lines }
    property Lines: TStrings read GetLines write SetLines;
    { Continue long lines on the next row, True by default }
    property WordWrap: Boolean read FWordWrap write SetWordWrap;
    { Show scroll bars when the text does not fit and scroll with the mouse
      wheel, False by default }
    property ScrollBars: Boolean read FScrollBars write SetScrollBars;
    property OnChange;
    property OnClick;
    property OnKeyDown;
    property OnKeyUp;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
  end;