{*******************************************************}
{                                                       }
{       TiPlotAnnotation                                }
{                                                       }
{       Copyright (c) 1997,2003 Iocomp Software         }
{                                                       }
{*******************************************************}
{$I iInclude.inc}

{$ifdef iVCL}unit  iPlotAnnotation;{$endif}
{$ifdef iCLX}unit QiPlotAnnotation;{$endif}

interface

uses
  {$I iIncludeUses.inc}
  {$IFDEF iVCL} iTypes,  iGPFunctions,  iPlotObjects,  iPlotDataView,  iPlotChannelCustom,  iPlotAxis,  ImgList;{$ENDIF}
  {$IFDEF iCLX}QiTypes, QiGPFunctions, QiPlotObjects, QiPlotDataView, QiPlotChannelCustom, QiPlotAxis, QImgList;{$ENDIF}

type
  TiPlotReferenceType         = (iprtDataView, iprtChannel, iprtXChannelYDataView, iprtXDataViewYChannel);
  TiPlotAnnotationStyle       = (ipasText, ipasLine, ipasRectangle, ipasLineX, ipasLineY, ipasImage, ipasTextRectangle, ipasEllipse, ipasTextBox);
  TiPlotAnnotationSelectStyle = (ipassNone, ipassMove,ipassSizeTopLeft,ipassSizeTopRight,ipassSizeBottomLeft,ipassSizeBottomRight);

  TiPlotAnnotation = class(TiPlotObject)
  private
    FStyle                    : TiPlotAnnotationStyle;                             
    FReference                : TiPlotReferenceType;

    FSelectStyle              : TiPlotAnnotationSelectStyle;

    FSizeTopLeftRect          : TRect;
    FSizeTopRightRect         : TRect;
    FSizeBottomLeftRect       : TRect;
    FSizeBottomRightRect      : TRect;

    FX                        : Double;
    FY                        : Double;
    FY2                       : Double;
    FX2                       : Double;
    FWidth                    : Double;
    FHeight                   : Double;

    FPenColor                 : TColor;
    FPenWidth                 : Integer;
    FPenStyle                 : TPenStyle;

    FBrushColor               : TColor;
    FBrushStyle               : TBrushStyle;

    FText                     : String;
    FFont                     : TFont;

    FChannelName              : String;
    FDataView                 : TiPlotDataView;
    FChannel                  : TiPlotChannelCustom;
    FTextRotation             : TiRotationAngle;

    FShowing                  : Boolean;
    FDrawRect                 : TRect;
    FClickRect                : TRect;
    FRectChange               : Boolean;
    FUserCanMove              : Boolean;
    FUserCanSize              : Boolean;
    FClipToAxes               : Boolean;

    FMouseDownXPos            : Double;
    FMouseDownYPos            : Double;
    FMouseDown                : Boolean;
    FMouseDownX               : Integer;
    FMouseDownY               : Integer;
    FMouseDownWidth           : Double;
    FMouseDownHeight          : Double;
    FMouseDownPositionPixelsX : Integer;
    FMouseDownPositionPixelsY : Integer;
    FMouseDownRect            : TRect;

    FImageListIndex           : Integer;
    FImageIndex               : Integer;
    FTextHorzAlignment        : TiAlignmentHorizontal;
    FTextVertAlignment        : TiAlignmentVertical;
    FTextHorzMargin           : Double;
    FTextVertMargin           : Double;
    FShowFocusRect            : Boolean;

    FMouseDownXValue          : Double;
    FMouseDownYValue          : Double;
    FMouseDownX2Value         : Double;
    FMouseDownY2Value         : Double;
    FOuterMargin              : Integer;

    function GetXMax: Integer;
    function GetXMin: Integer;
    function GetYMax: Integer;
    function GetYMin: Integer;
  protected
    procedure SetBrushColor       (const Value: TColor);
    procedure SetBrushStyle       (const Value: TBrushStyle);
    procedure SetHeight           (const Value: Double);
    procedure SetReference        (const Value: TiPlotReferenceType);
    procedure SetPenColor         (const Value: TColor);
    procedure SetPenStyle         (const Value: TPenStyle);
    procedure SetPenWidth         (const Value: Integer);
    procedure SetStyle            (const Value: TiPlotAnnotationStyle);
    procedure SetWidth            (const Value: Double);
    procedure SetX                (const Value: Double);
    procedure SetY                (const Value: Double);
    procedure SetX2               (const Value: Double);
    procedure SetY2               (const Value: Double);
    procedure SetFont             (const Value: TFont);
    procedure SetText             (const Value: String);
    procedure SetChannelName      (const Value: String);
    procedure SetTextRotation     (const Value: TiRotationAngle);
    procedure SetUserCanMove      (const Value: Boolean);
    procedure SetUserCanSize      (const Value: Boolean);
    procedure SetClipToAxes       (const Value: Boolean);
    procedure SetImageListIndex   (const Value: Integer);
    procedure SetImageIndex       (const Value: Integer);
    procedure SetTextHorzAlignment(const Value: TiAlignmentHorizontal);
    procedure SetTextVertAlignment(const Value: TiAlignmentVertical);
    procedure SetTextHorzMargin   (const Value: Double);
    procedure SetTextVertMargin   (const Value: Double);
    procedure SetShowFocusRect    (const Value: Boolean);
    procedure SetOuterMargin      (const Value: Integer);

    procedure NotificationRemove  (Sender: TObject);                                                   override;
    procedure NotificationSetFocus(Sender: TObject);                                                   override;
    procedure NotificationRename  (Sender: TObject);                                                   override;

    procedure DoMouseLeft(MouseData: TiPlotMouseData);                                                 override;
    procedure DoMouseMove(MouseData: TiPlotMouseData);                                                 override;
    procedure DoMouseUp  (MouseData: TiPlotMouseData);                                                 override;

    function  GetChannel: TiPlotChannelCustom;

    function  GetMousePointer(APoint: TPoint): TCursor;                                                override;

    function  iMouseHitTest(MouseData: TiPlotMouseData): Boolean;                                      override;

    procedure Draw              (const Canvas: TCanvas; const BackGroundColor: TColor);                override;
    procedure SetupRectangle(ARect: TRect);


    function MousePointToXPos(APoint: TPoint): Double;
    function MousePointToYPos(APoint: TPoint): Double;

    function IsMoveable: Boolean;
    function IsSizeable: Boolean;

    property DataView     : TiPlotDataView         read FDataView    write FDataView;
    property Channel      : TiPlotChannelCustom    read GetChannel;
  public
    constructor Create(AOwner: TObject; AOnChange, AOnInsert, AOnRemove, AOnRename: TNotifyEvent); override;
    destructor  Destroy;                                                                               override;

    function  PositionXToPixels (Value: Double ): Integer;
    function  PositionYToPixels (Value: Double ): Integer;
    function  PixelsXToPosition (Value: Integer): Double;
    function  PixelsYToPosition (Value: Integer): Double;
  published
    property Style             : TiPlotAnnotationStyle  read FStyle             write SetStyle;
    property Reference         : TiPlotReferenceType    read FReference         write SetReference;

    property X                 : Double                 read FX                 write SetX;
    property Y                 : Double                 read FY                 write SetY;
    property X2                : Double                 read FX2                write SetX2;
    property Y2                : Double                 read FY2                write SetY2;
    property Width             : Double                 read FWidth             write SetWidth;
    property Height            : Double                 read FHeight            write SetHeight;

    property PenColor          : TColor                 read FPenColor          write SetPenColor;
    property PenStyle          : TPenStyle              read FPenStyle          write SetPenStyle;
    property PenWidth          : Integer                read FPenWidth          write SetPenWidth;

    property BrushColor        : TColor                 read FBrushColor        write SetBrushColor;
    property BrushStyle        : TBrushStyle            read FBrushStyle        write SetBrushStyle;

    property Text              : String                 read FText              write SetText;
    property TextRotation      : TiRotationAngle        read FTextRotation      write SetTextRotation;
    property TextHorzAlignment : TiAlignmentHorizontal  read FTextHorzAlignment write SetTextHorzAlignment;
    property TextVertAlignment : TiAlignmentVertical    read FTextVertAlignment write SetTextVertAlignment;
    property TextHorzMargin    : Double                 read FTextHorzMargin    write SetTextHorzMargin;
    property TextVertMargin    : Double                 read FTextVertMargin    write SetTextVertMargin;
    property Font              : TFont                  read FFont              write SetFont;
    property OuterMargin       : Integer                read FOuterMargin       write SetOuterMargin;

    property ImageListIndex    : Integer                read FImageListIndex     write SetImageListIndex;
    property ImageIndex        : Integer                read FImageIndex         write SetImageIndex;

    property ChannelName       : String                 read FChannelName        write SetChannelName;

    property UserCanMove       : Boolean                read FUserCanMove        write SetUserCanMove;
    property UserCanSize       : Boolean                read FUserCanSize        write SetUserCanSize;

    property ClipToAxes        : Boolean                read FClipToAxes         write SetClipToAxes;

    property ShowFocusRect     : Boolean                read FShowFocusRect      write SetShowFocusRect;
  end;

implementation

uses
{$ifdef iVCL} iPlotComponent;{$endif}
{$ifdef iCLX}QiPlotComponent;{$endif}

type
  TiPlotChannelCustomAccess = class(TiPlotChannelCustom)end;
  TiPlotAxisAccess          = class(TiPlotAxis)         end;
  TiPlotComponentAccess     = class(TiPlotComponent    )end;
//****************************************************************************************************************************************************
constructor TiPlotAnnotation.Create(AOwner: TObject; AOnChange, AOnInsert, AOnRemove, AOnRename: TNotifyEvent);
begin
  inherited Create(AOwner, AOnChange, AOnInsert, AOnRemove, AOnRename);
  FFont           := TFont.Create;
  Font.Name       := 'Arial';
  FFont.OnChange  := TriggerChange;
  FFont.Color     := clWhite; 

  FTextHorzMargin := 1;
  FTextVertMargin := 1;

  FShowFocusRect  := True;
                                            
  FBrushColor     := clWhite;
  FPenColor       := clWhite;
end;
//****************************************************************************************************************************************************
destructor TiPlotAnnotation.Destroy;
begin
  FFont.Free;
  inherited;
end;
//****************************************************************************************************************************************************
function TiPlotAnnotation.GetChannel: TiPlotChannelCustom;
begin
  if not Assigned(FChannel) then FChannel := (Owner as TiPlotComponent).GetChannelByName(ChannelName);
  Result := FChannel;
end;
//****************************************************************************************************************************************************
procedure TiPlotAnnotation.NotificationRemove(Sender: TObject);
begin
  if Sender = FDataView then FDataView := nil;
  if Sender = FChannel  then FChannel  := nil;