{*******************************************************}
{                                                       }
{         Delphi VCL Extensions (RX)                    }
{                                                       }
{         Copyright (c) 1995 AO ROSNO                   }
{         Copyright (c) 1997, 1998 Master-Bank          }
{                                                       }
{*******************************************************}

unit RXSpin;

interface

{$I RX.INC}

uses {$IFDEF WIN32} Windows, ComCtrls, {$ELSE} WinTypes, WinProcs, {$ENDIF}
  Controls, ExtCtrls, Classes, Graphics, Messages, Forms, StdCtrls, Menus,
  SysUtils;

type

{ TRxSpinButton }

  TSpinButtonState = (sbNotDown, sbTopDown, sbBottomDown);

  TRxSpinButton = class(TGraphicControl)
  private
    FDown: TSpinButtonState;
    FUpBitmap: TBitmap;
    FDownBitmap: TBitmap;
    FDragging: Boolean;
    FInvalidate: Boolean;
    FTopDownBtn: TBitmap;
    FBottomDownBtn: TBitmap;
    FRepeatTimer: TTimer;
    FNotDownBtn: TBitmap;
    FLastDown: TSpinButtonState;
    FFocusControl: TWinControl;
    FOnTopClick: TNotifyEvent;
    FOnBottomClick: TNotifyEvent;
    procedure TopClick;
    procedure BottomClick;
    procedure GlyphChanged(Sender: TObject);
    function GetUpGlyph: TBitmap;
    function GetDownGlyph: TBitmap;
    procedure SetUpGlyph(Value: TBitmap);
    procedure SetDownGlyph(Value: TBitmap);
    procedure SetDown(Value: TSpinButtonState);
    procedure SetFocusControl(Value: TWinControl);
    procedure DrawAllBitmap;
    procedure DrawBitmap(ABitmap: TBitmap; ADownState: TSpinButtonState);
    procedure TimerExpired(Sender: TObject);
    procedure CMEnabledChanged(var Message: TMessage); message CM_ENABLEDCHANGED;
  protected
    procedure Paint; override;
    procedure MouseDown(Button: TMouseButton; Shift: TShiftState;
      X, Y: Integer); override;
    procedure MouseMove(Shift: TShiftState; X, Y: Integer); override;
    procedure MouseUp(Button: TMouseButton; Shift: TShiftState;
      X, Y: Integer); override;
    procedure Notification(AComponent: TComponent;
      Operation: TOperation); override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    property Down: TSpinButtonState read FDown write SetDown default sbNotDown;
  published
    property DragCursor;
    property DragMode;
    property Enabled;
    property Visible;
    property DownGlyph: TBitmap read GetDownGlyph write SetDownGlyph;
    property UpGlyph: TBitmap read GetUpGlyph write SetUpGlyph;
    property FocusControl: TWinControl read FFocusControl write SetFocusControl;
    property ShowHint;
    property ParentShowHint;
{$IFDEF RX_D4}
    property Anchors;
    property Constraints;
    property DragKind;
{$ENDIF}
    property OnBottomClick: TNotifyEvent read FOnBottomClick write FOnBottomClick;
    property OnTopClick: TNotifyEvent read FOnTopClick write FOnTopClick;
    property OnDragDrop;
    property OnDragOver;
    property OnEndDrag;
{$IFDEF WIN32}
    property OnStartDrag;
{$ENDIF}
{$IFDEF RX_D4}
    property OnEndDock;
    property OnStartDock;
{$ENDIF}
  end;

{ TRxSpinEdit }

{$IFDEF CBUILDER}
  TValueType = (vtInt, vtFloat, vtHex);
{$ELSE}
  TValueType = (vtInteger, vtFloat, vtHex);
{$ENDIF}

{$IFDEF WIN32}
  TSpinButtonKind = (bkStandard, bkDiagonal);
{$ENDIF}

  TRxSpinEdit = class(TCustomEdit)
  private
    FAlignment: TAlignment;
    FMinValue: Extended;
    FMaxValue: Extended;
    FIncrement: Extended;
    FDecimal: Byte;
    FChanging: Boolean;
    FEditorEnabled: Boolean;
    FValueType: TValueType;
    FButton: TRxSpinButton;
    FBtnWindow: TWinControl;
    FArrowKeys: Boolean;
    FOnTopClick: TNotifyEvent;
    FOnBottomClick: TNotifyEvent;
{$IFDEF WIN32}
    FButtonKind: TSpinButtonKind;
    FUpDown: TCustomUpDown;
    function GetButtonKind: TSpinButtonKind;
    procedure SetButtonKind(Value: TSpinButtonKind);
    procedure UpDownClick(Sender: TObject; Button: TUDBtnType);
{$ENDIF}
    function GetMinHeight: Integer;
    procedure GetTextHeight(var SysHeight, Height: Integer);
    function GetValue: Extended;
    function CheckValue(NewValue: Extended): Extended;
    function GetAsInteger: Longint;
    function IsIncrementStored: Boolean;
    function IsMaxStored: Boolean;
    function IsMinStored: Boolean;
    function IsValueStored: Boolean;
    procedure SetArrowKeys(Value: Boolean);
    procedure SetAsInteger(NewValue: Longint);
    procedure SetValue(NewValue: Extended);
    procedure SetValueType(NewType: TValueType);
    procedure SetDecimal(NewValue: Byte);
    function GetButtonWidth: Integer;
    procedure RecreateButton;
    procedure ResizeButton;
    procedure SetEditRect;
    procedure SetAlignment(Value: TAlignment);
    procedure WMSize(var Message: TWMSize); message WM_SIZE;
    procedure CMEnter(var Message: TMessage); message CM_ENTER;
    procedure CMExit(var Message: TCMExit); message CM_EXIT;
    procedure WMPaste(var Message: TWMPaste); message WM_PASTE;
    procedure WMCut(var Message: TWMCut); message WM_CUT;
    procedure CMCtl3DChanged(var Message: TMessage); message CM_CTL3DCHANGED;
    procedure CMEnabledChanged(var Message: TMessage); message CM_ENABLEDCHANGED;
    procedure CMFontChanged(var Message: TMessage); message CM_FONTCHANGED;
{$IFDEF RX_D4}
    procedure CMBiDiModeChanged(var Message: TMessage); message CM_BIDIMODECHANGED;
{$ENDIF}
  protected
    procedure Change; override;
    function IsValidChar(Key: Char): Boolean; virtual;
    procedure UpClick(Sender: TObject); virtual;
    procedure DownClick(Sender: TObject); virtual;
    procedure KeyDown(var Key: Word; Shift: TShiftState); override;
    procedure KeyPress(var Key: Char); override;
    procedure CreateParams(var Params: TCreateParams); override;
    procedure CreateWnd; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    property AsInteger: Longint read GetAsInteger write SetAsInteger default 0;
    property Text;
  published
    property Alignment: TAlignment read FAlignment write SetAlignment
      default taLeftJustify;
    property ArrowKeys: Boolean read FArrowKeys write SetArrowKeys default True;
{$IFDEF WIN32}
    property ButtonKind: TSpinButtonKind read FButtonKind write SetButtonKind
      default bkDiagonal;
{$ENDIF}
    property Decimal: Byte read FDecimal write SetDecimal default 2;
    property EditorEnabled: Boolean read FEditorEnabled write FEditorEnabled default True;
    property Increment: Extended read FIncrement write FIncrement stored IsIncrementStored;
    property MaxValue: Extended read FMaxValue write FMaxValue stored IsMaxStored;
    property MinValue: Extended read FMinValue write FMinValue stored IsMinStored;
    property ValueType: TValueType read FValueType write SetValueType
      default {$IFDEF CBUILDER} vtInt {$ELSE} vtInteger {$ENDIF};
    property Value: Extended read GetValue write SetValue stored IsValueStored;
    property AutoSelect;
    property AutoSize;
    property BorderStyle;
    property Color;
    property Ctl3D;
    property DragCursor;
    property DragMode;
    property Enabled;
    property Font;
{$IFDEF RX_D4}
    property Anchors;
    property BiDiMode;
    property Constraints;
    property DragKind;
    property ParentBiDiMode;
{$ENDIF}
{$IFDEF WIN32}
  {$IFNDEF VER90}
    property ImeMode;
    property ImeName;
  {$ENDIF}
{$ENDIF}
    property MaxLength;
    property ParentColor;
    property ParentCtl3D;
    property ParentFont;
    property ParentShowHint;
    property PopupMenu;
    property ReadOnly;
    property ShowHint;
    property TabOrder;
    property TabStop;
    property Visible;
    property OnBottomClick: TNotifyEvent read FOnBottomClick write FOnBottomClick;
    property OnTopClick: TNotifyEvent read FOnTopClick write FOnTopClick;
    property OnChange;
    property OnClick;
    property OnDblClick;
    property OnDragDrop;
    property OnDragOver;
    property OnEndDrag;
    property OnEnter;
    property OnExit;
    property OnKeyDown;
    property OnKeyPress;
    property OnKeyUp;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
{$IFDEF WIN32}
    property OnStartDrag;
{$ENDIF}
{$IFDEF RX_D5}
    property OnContextPopup;
{$ENDIF}
{$IFDEF RX_D4}
    property OnMouseWheelDown;
    property OnMouseWheelUp;
    property OnEndDock;
    property OnStartDock;
{$ENDIF}
  end;

implementation

uses {$IFDEF WIN32} CommCtrl, {$ENDIF} VCLUtils;

{$IFDEF WIN32}
 {$R *.R32}
{$ELSE}
 {$R *.R16}
{$ENDIF}

const
  sSpinUpBtn = 'RXSPINUP';
  sSpinDownBtn = 'RXSPINDOWN';

const
  InitRepeatPause = 400; { pause before repeat timer (ms) }
  RepeatPause     = 100;

{ TRxSpinButton }

constructor TRxSpinButton.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  FUpBitmap := TBitmap.Create;
  FDownBitmap := TBitmap.Create;
  FUpBitmap.Handle := LoadBitmap(HInstance, sSpinUpBtn);
  FDownBitmap.Handle := LoadBitmap(HInstance, sSpinDownBtn);
  FUpBitmap.OnChange := GlyphChanged;
  FDownBitmap.OnChange := GlyphChanged;
  Height := 20;
  Width := 20;
  FTopDownBtn := TBitmap.Create;
  FBottomDownBtn := TBitmap.Create;
  FNotDownBtn := TBitmap.Create;
  DrawAllBitmap;
  FLastDown := sbNotDown;
end;

destructor TRxSpinButton.Destroy;
begin
  FTopDownBtn.Free;
  FBottomDownBtn.Free;
  FNotDownBtn.Free;
  FUpBitmap.Free;
  FDownBitmap.Free;
  FRepeatTimer.Free;
  inherited Destroy;
end;

procedure TRxSpinButton.GlyphChanged(Sender: TObject);
begin
  FInvalidate := True;
  Invalidate;
end;

function TRxSpinButton.GetUpGlyph: TBitmap;
begin
  Result := FUpBitmap;
end;

procedure TRxSpinButton.SetUpGlyph(Value: TBitmap);
begin
  if Value <> nil then FUpBitmap.Assign(Value)
  else FUpBitmap.Handle := LoadBitmap(HInstance, sSpinUpBtn);
end;

function TRxSpinButton.GetDownGlyph: TBitmap;
begin
  Result := FDownBitmap;
end;

procedure TRxSpinButton.SetDownGlyph(Value: TBitmap);
begin
  if Value <> nil then FDownBitmap.Assign(Value)
  else FDownBitmap.Handle := LoadBitmap(HInstance, sSpinDownBtn);
end;

procedure TRxSpinButton.SetDown(Value: TSpinButtonState);
var
  OldState: TSpinButtonState;
begin
  OldState := FDown;
  FDown := Value;
  if OldState <> FDown then Repaint;
end;

procedure TRxSpinButton.SetFocusControl(Value: TWinControl);
begin
  FFocusControl := Value;
{$IFDEF WIN32}
  if Value <> nil then Value.FreeNotification(Self);
{$ENDIF}
end;

procedure TRxSpinButton.Notification(AComponent: TComponent;
  Operation: TOperation);
begin
  inherited Notification(AComponent, Operation);
  if (Operation = opRemove) and (AComponent = FFocusControl) then
    FFocusControl := nil;
end;

procedure TRxSpinButton.Paint;
begin
  if not Enabled and not (csDesigning in ComponentState) then
    FDragging := False;
  if (FNotDownBtn.Height <> Height) or (FNotDownBtn.Width <> Width) or
    FInvalidate then DrawAllBitmap;
  FInvalidate := False;
  with Canvas do
    case FDown of
      sbNotDown: Draw(0, 0, FNotDownBtn);
      sbTopDown: Draw(0, 0, FTopDownBtn);
      sbBottomDown: Draw(0, 0, FBottomDownBtn);
    end;
end;

procedure TRxSpinButton.DrawAllBitmap;
begin
  DrawBitmap(FTopDownBtn, sbTopDown);
  DrawBitmap(FBottomDownBtn, sbBottomDown);
  DrawBitmap(FNotDownBtn, sbNotDown);
end;

procedure TRxSpinButton.DrawBitmap(ABitmap: TBitmap; ADownState: TSpinButtonState);
var
  R, RSrc: TRect;