{*******************************************************************}
{                                                                   }
{   dxCore (Design eXperience)                                      }
{                                                                   }
{   Copyright (c) 2002 APRIORI business solutions AG                }
{   (W)ritten by M. Hoffmann - ALL RIGHTS RESERVED.                 }
{                                                                   }
{   DEVELOPER NOTES:                                                }
{   ==========================================================      }
{   This file is part of a component suite called Design            }
{   eXperience and may be used in freeware- or commercial           }
{   applications. The package itself is distributed as              } 
{   freeware with full sourcecodes.                                 }
{                                                                   }
{   Feel free to fix bugs or include new features if you are        }
{   familiar with component programming. If so, please email        }
{   me your modifications, so it will be possible for me to         }
{   include nice improvements in further releases:                  }
{                                                                   }
{   Contact: mhoffmann@apriori.de                                   }
{                                                                   }
{   History:                                                        }
{   =============================================================== }
{   2002/05/02                                                      }
{     * Replaced calling params with const attribute                }
{     * Added some core methods (should be optimized in the future. }
{     * Minor Changes                                               }
{                                                                   }
{   2002/04/30                                                      }
{     * Minor Changes                                               }
{                                                                   }
{   2002/04/29                                                      }
{     * Fixed CMDialogChar                                          }
{       (Thanks to Saeed Dudhia                                     }
{                                                                   }
{   Release                                                         }
{     * Minor Bugfixes                                              }
{     * Fixed OnClick method                                        }
{     + Added Version property                                      }
{     + Added support for earlier Delphi Versions                   }
{       (Thanks to Flavio Peinado)                                  }
{     + Replaced OwnerDrawState with internal Structure             }
{     + First Release                                               }
{                                                                   }
{*******************************************************************}

unit dxCore;

interface

uses
  Windows, Messages, Classes, Graphics, Controls, Forms, Dialogs;

type
{ Common Structures }

  TdxBoundLines = set of (blLeft, blTop, blRight, blBottom);
  TdxColorSteps = 2..255;
  TdxDrawState = set of (dsDefault, dsHotLight, dsFocused, dsSelected);
  TdxGradientStyle = (gsLeft, gsTop, gsRight, gsBottom);

{ TdxUnleashedWinControl }

  TdxUnleashedWinControl = class(TWinControl)
  published
    { Published declarations }
    property Color;
    property Font;
  end;

{ TdxCustomControl }

  TdxCustomControl = class(TCustomControl)
  private
    { Private desclarations }
    FAbout: string;
    FLocked: Boolean;
    FModalResult: TModalResult;
    FOnMouseLeave: TNotifyEvent;
    FOnMouseEnter: TNotifyEvent;
    procedure CMDialogChar(var Message: TCMDialogChar); message CM_DIALOGCHAR;
    procedure CMEnabledChanged(var Message: TMessage); message CM_ENABLEDCHANGED;
    procedure CMFocusChanged(var Message: TMessage); message CM_FOCUSCHANGED;
    procedure CMMouseEnter(var Message: TMessage); message CM_MOUSEENTER;
    procedure CMMouseLeave(var Message: TMessage); message CM_MOUSELEAVE;
    procedure CMParentColorChanged(var Message: TMessage); message CM_PARENTCOLORCHANGED;
    procedure CMTextChanged(var Message: TMessage); message CM_TEXTCHANGED;
    procedure WMSize(var Message: TWMSize); message WM_SIZE;
    procedure SetAbout(Value: string);
    procedure SetVersion(Value: string);
  protected
    { Protected desclarations }
    function GetVersion: string; virtual;
    procedure Click; 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 HookEnabledChanged; dynamic;
    procedure HookFocusedChanged; dynamic;
    procedure HookMouseDown; dynamic;
    procedure HookMouseEnter; dynamic;
    procedure HookMouseLeave; dynamic;
    procedure HookMouseMove; dynamic;
    procedure HookMouseUp; dynamic;
    procedure HookParentColorChanged; dynamic;
    procedure HookResized; dynamic;
    procedure HookTextChanged; dynamic;
    property ModalResult: TModalResult read FModalResult write FModalResult default 0;
  public
    { Public desclarations }
    DrawState: TdxDrawState;
    IsSibling: Boolean;
    constructor Create(AOwner: TComponent); override;
    procedure LockUpdate;
    procedure UnlockUpdate;
  published
    { Published declarations }
    property About: string read FAbout write SetAbout;
    property Anchors;
    property Align;
    property BiDiMode;
    property Color;
    property Constraints;
    property DragCursor;
    property DragKind;
    property DragMode;
    property Enabled;
    property Font;
    property ParentBiDiMode;
    property ParentColor;
    property ParentFont;
    property ParentShowHint;
    property PopupMenu;
    property ShowHint;
    property Version: string read GetVersion write SetVersion;
    property OnClick;
    {$IFDEF VER140} { Borland Delphi 6.0 }
    property OnContextPopup;
    {$ENDIF}
    property OnDragDrop;
    property OnDragOver;
    property OnEndDock;
    property OnEndDrag;
    property OnEnter;
    property OnExit;
    property OnKeyDown;
    property OnKeyPress;
    property OnKeyUp;
    property OnMouseDown;
    property OnMouseEnter: TNotifyEvent read FOnMouseEnter write FOnMouseEnter;
    property OnMouseLeave: TNotifyEvent read FOnMouseLeave write FOnMouseLeave;
    property OnMouseMove;
    property OnMouseUp;
    property OnStartDock;
    property OnStartDrag;
  end;

{ TdxGradient }

  TdxGradient = class(TPersistent)
  private
    { Private-Deklarationen }
    FColorSteps: TdxColorSteps;
    FDithered: Boolean;
    FEnabled: Boolean;
    FEndColor: TColor;
    FStartColor: TColor;
    FGradientStyle: TdxGradientStyle;
  protected
    { Protected declarations }
    Parent: TControl;
    procedure SetDithered(Value: Boolean); virtual;
    procedure SetColorSteps(Value: TdxColorSteps); virtual;
    procedure SetEnabled(Value: Boolean); virtual;
    procedure SetEndColor(Value: TColor); virtual;
    procedure SetGradientStyle(Value: TdxGradientStyle); virtual;
    procedure SetStartColor(Value: TColor); virtual;
  public
    { Public declarations }
    Bitmap: TBitmap;
    constructor Create(AOwner: TControl);
    destructor Destroy; override;
    procedure RecreateBands; virtual;
  published
    { Published-Deklarationen }
    property Dithered: Boolean read FDithered write SetDithered default True;
    property ColorSteps: TdxColorSteps read FColorSteps write SetColorSteps default 16;
    property Enabled: Boolean read FEnabled write SetEnabled default True;
    property EndColor: TColor read FEndColor write SetEndColor default clSilver;
    property StartColor: TColor read FStartColor write SetStartColor default clGray;
    property Style: TdxGradientStyle read FGradientStyle write SetGradientStyle default gsLeft;
  end;

// dxDrawLine
procedure dxDrawLine(const ACanvas: TCanvas; const x1, y1, x2, y2: Integer);

// dxDrawBoundLines
procedure dxDrawBoundLines(const ACanvas: TCanvas; const ABoundLines: TdxBoundLines;
  const AColor: TColor; const R: TRect);

// dxCreateGradientRect
procedure dxCreateGradientRect(const Width, Height: Integer; const StartColor,
  EndColor: TColor; const ColorSteps: TdxColorSteps; const Style: TdxGradientStyle;
  const Dithered: Boolean; var Bitmap: TBitmap);

// dxRenderText
procedure dxRenderText(const Parent: TControl; const Canvas: TCanvas;
  AText: string; const AFont: TFont; const Enabled, ShowAccelChar: Boolean;
  var Rect: TRect; Flags: Integer);

// dxPlaceText
procedure dxPlaceText(const Parent: TControl; const Canvas: TCanvas;
  const AText: string; const AFont: TFont; const Enabled, ShowAccelChar: Boolean;
  const Alignment: TAlignment; const WordWrap: Boolean; var Rect: TRect);

// dxSetDrawFlags
procedure dxSetDrawFlags(const Alignment: TAlignment; const WordWrap: Boolean;
  var Flags: Integer);

implementation

{ TdxCustomControl }

{-----------------------------------------------------------------------------
  Procedure: TdxCustomControl.Create
  Author:    mh
  Date:      22-Feb-2002
  Arguments: AOwner: TComponent
  Result:    None
-----------------------------------------------------------------------------}

constructor TdxCustomControl.Create(AOwner: TComponent);
begin
  inherited;
  DoubleBuffered := True;
  DrawState := [dsDefault];
  IsSibling := False;
  FAbout := 'Design eXperience.