{***************************************************}
{                                                   }
{             FastReport v4.0                       }
{              Tool controls                        }
{                                                   }
{         Copyright (c) 1998-2008                   }
{         by Alexander Tzyganenko,                  }
{            Fast Reports Inc.                      }
{                                                   }
{                                                   }
{  Flat ComboBox, FontComboBox v1.2                 }
{  For Delphi 2,3,4,5. Freeware.                    }
{                                                   }
{  Copyright (c) 1999 by:                           }
{    Dmitry Statilko (dima_misc@hotbox.ru)          }
{    - Main idea and realisation of Flat ComboBox   }
{      inherited from TCustomComboBox               }
{                                                   }
{    Vladislav Necheporenko (vlad_n@ua.fm)          }
{    - Help in bug fixes                            }
{    - Adaptation to work on Delphi 2               }
{    - MRU list in FontComboBox that stored values  }
{      in regitry                                   }
{    - Font preview box in FontComboBox             }
{    - New look style, like in Office XP            }
{                                                   }
{***************************************************}

unit frxCtrls;

interface

{$I frx.inc}

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls, CommCtrl, ExtCtrls, Buttons, Registry, ActiveX
{$IFDEF Delphi6}
, Variants
{$ENDIF};
  

type
{$IFDEF DELPHI16}
[ComponentPlatformsAttribute(pidWin32 or pidWin64)]
{$ENDIF}
  TfrxCustomComboBox = class(TCustomComboBox)
  private
    FUpDropdown: Boolean;
    FButtonWidth: Integer;
    msMouseInControl: Boolean;
    FListHandle: HWND;
    FListInstance: Pointer;
    FDefListProc: Pointer;
    FChildHandle: HWND;
    FSolidBorder: Boolean;
    FReadOnly: Boolean;
    FEditOffset: Integer;
    FListWidth: Integer;
    procedure ListWndProc(var Message: TMessage);
    procedure WMPaint(var Message: TWMPaint); message WM_PAINT;
    procedure CNCommand(var Message: TWMCommand); message CN_COMMAND;
    procedure CMEnabledChanged(var Msg: TMessage); message CM_ENABLEDCHANGED;
    procedure CMMouseEnter(var Message: TMessage); message CM_MOUSEENTER;
    procedure CMMouseLeave(var Message: TMessage); message CM_MOUSELEAVE;
    procedure CMFontChanged(var Message: TMessage); message CM_FONTCHANGED;
    procedure PaintButtonGlyph(DC: HDC; X: Integer; Y: Integer; Color: TColor);    
    procedure PaintButton(ButtonStyle: Integer);
    procedure PaintBorder(DC: HDC; const SolidBorder: Boolean);
    procedure PaintDisabled;
    function GetSolidBorder: Boolean;
    function GetListHeight: Integer;
    procedure SetReadOnly(Value: Boolean);
  protected
    procedure CreateParams(var Params: TCreateParams); override;
    procedure ComboWndProc(var Message: TMessage; ComboWnd: HWnd; ComboProc: Pointer); override;
    procedure WndProc(var Message: TMessage); override;
    procedure CreateWnd; override;
    procedure DrawImage(DC: HDC; Index: Integer; R: TRect); dynamic;
    procedure KeyPress(var Key: Char); override;
    property ListWidth: Integer read FListWidth write FListWidth;
    property ReadOnly: Boolean read FReadOnly write SetReadOnly default False;
    property SolidBorder: Boolean read FSolidBorder;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  end;

{$IFDEF DELPHI16}
[ComponentPlatformsAttribute(pidWin32 or pidWin64)]
{$ENDIF}
  TfrxComboBox = class(TfrxCustomComboBox)
  published
    property Color;
    property DragMode;
    property DragCursor;
    property DropDownCount;
    property Enabled;
    property Font;
    property ItemHeight;
    property Items;
    property ListWidth;
    property MaxLength;
    property ParentColor;
    property ParentFont;
    property ParentShowHint;
    property PopupMenu;
    property ShowHint;
    property Sorted;
    property TabOrder;
    property TabStop;
    property Text;
    property ReadOnly;
    property Visible;
    property ItemIndex;
    property OnChange;
    property OnClick;
    property OnDblClick;
    property OnDragDrop;
    property OnDragOver;
    property OnDrawItem;
    property OnDropDown;
    property OnEndDrag;
    property OnEnter;
    property OnExit;
    property OnKeyDown;
    property OnKeyPress;
    property OnKeyUp;
    property OnStartDrag;
{$IFDEF Delphi4}
    property Anchors;
    property BiDiMode;
    property Constraints;
    property DragKind;
    property ParentBiDiMode;
    property OnEndDock;
    property OnStartDock;
{$ENDIF}
  end;

{$IFDEF DELPHI16}
[ComponentPlatformsAttribute(pidWin32 or pidWin64)]
{$ENDIF}
  TfrxFontPreview = class(TWinControl)
  private
    FPanel: TPanel;
  protected
    procedure CreateParams(var Params: TCreateParams); override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  end;

{$IFDEF DELPHI16}
[ComponentPlatformsAttribute(pidWin32 or pidWin64)]
{$ENDIF}
  TfrxFontComboBox = class(TfrxCustomComboBox)
  private
    frFontViewForm: TfrxFontPreview;
    FRegKey: String;
    FTrueTypeBMP: TBitmap;
    FDeviceBMP: TBitmap;
    FOnClick: TNotifyEvent;
    FUpdate: Boolean;
    FShowMRU: Boolean;
    Numused: Integer;
    procedure CNCommand(var Message: TWMCommand); message CN_COMMAND;
    procedure CMFontChanged(var Message: TMessage); message CM_FONTCHANGED;
    procedure CMFontChange(var Message: TMessage); message CM_FONTCHANGE;
    procedure SetRegKey(Value: String);
  protected
    procedure Loaded; override;
    procedure Init;
    procedure Reset;
    procedure Click; override;
    procedure DrawItem(Index: Integer; Rect: TRect; State: TOwnerDrawState); override;
    procedure DrawImage(DC: HDC; Index: Integer; R: TRect); override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure PopulateList; virtual;
  published
    property ShowMRU: Boolean read FShowMRU write FShowMRU default True;
    property MRURegKey: String read FRegKey write SetRegKey;
    property Text;
    property Color;
    property DragMode;
    property DragCursor;
    property DropDownCount;
    property Enabled;
    property Font;
{$IFDEF Delphi4}
    property Anchors;
    property BiDiMode;
    property Constraints;
    property DragKind;
    property ParentBiDiMode;
{$ENDIF}
    property ItemHeight;
    property ParentColor;
    property ParentFont;
    property ParentShowHint;
    property PopupMenu;
    property ShowHint;
    property TabOrder;
    property TabStop;
    property Visible;
    property OnChange;
    property OnClick: TNotifyEvent read FOnClick write FOnClick;
    property OnDblClick;
    property OnDragDrop;
    property OnDragOver;
    property OnDropDown;
    property OnEndDrag;
    property OnEnter;
    property OnExit;
    property OnKeyDown;
    property OnKeyPress;
    property OnKeyUp;
    property OnStartDrag;
{$IFDEF Delphi4}
    property OnEndDock;
    property OnStartDock;
{$ENDIF}
  end;

{$IFDEF DELPHI16}
[ComponentPlatformsAttribute(pidWin32 or pidWin64)]
{$ENDIF}
  TfrxComboEdit = class(TComboBox)
  private
    FPanel: TWinControl;
    FButton: TSpeedButton;
    FButtonEnabled: Boolean;
    FOnButtonClick: TNotifyEvent;
    function GetGlyph: TBitmap;
    procedure SetGlyph(Value: TBitmap);
    function GetButtonHint: String;
    procedure SetButtonHint(Value: String);
    procedure SetButtonEnabled(Value: Boolean);
    procedure ButtonClick(Sender: TObject);
    procedure WMSize(var Message: TWMSize); message WM_SIZE;
    procedure CMEnabledChanged(var Message: TMessage); message CM_ENABLEDCHANGED;
    procedure SetPos;
  public
    constructor Create(AOwner: TComponent); override;
    procedure CreateWnd; override;
    procedure KeyPress(var Key: Char); override;
  published
    property Glyph: TBitmap read GetGlyph write SetGlyph;
    property ButtonEnabled: Boolean read FButtonEnabled write SetButtonEnabled default True;
    property ButtonHint: String read GetButtonHint write SetButtonHint;
    property OnButtonClick: TNotifyEvent read FOnButtonClick write FOnButtonClick;
  end;

  TfrxScrollWin = class(TCustomControl)
  private
    FBorderStyle: TBorderStyle;
    FHorzPage: Integer;
    FHorzPosition: Integer;
    FHorzRange: Integer;
    FLargeChange: Integer;
    FSmallChange: Integer;
    FVertPage: Integer;
    FVertPosition: Integer;
    FVertRange: Integer;
    function GetLongPosition(DefValue: Integer; Code: Word): Integer;
    procedure SetHorzPosition(Value: Integer);
    procedure SetHorzRange(Value: Integer);
    procedure SetPosition(Value: Integer; Code: Word);
    procedure SetVertPosition(Value: Integer);
    procedure SetVertRange(Value: Integer);
    procedure UpdateScrollBar(Max, Page, Pos: Integer; Code: Word);
    procedure WMEraseBackground(var Message: TMessage); message WM_ERASEBKGND;
    procedure WMGetDlgCode(var Message: TWMGetDlgCode); message WM_GETDLGCODE;
    procedure WMHScroll(var Message: TWMHScroll); message WM_HSCROLL;
    procedure WMVScroll(var Message: TWMVScroll); message WM_VSCROLL;
    procedure SetHorzPage(const Value: Integer);
    procedure SetVertPage(const Value: Integer);
    procedure SetBorderStyle(const Value: TBorderStyle);
  protected
    procedure CreateParams(var Params: TCreateParams); override;
    procedure OnHScrollChange(Sender: TObject); virtual;
    procedure OnVScrollChange(Sender: TObject); virtual;
  public
    constructor Create(AOwner: TComponent); override;
    procedure Paint; override;
    property BevelKind;
    property BorderStyle: TBorderStyle read FBorderStyle write SetBorderStyle;
    property HorzPage: Integer read FHorzPage write SetHorzPage;
    property HorzPosition: Integer read FHorzPosition write SetHorzPosition;
    property HorzRange: Integer read FHorzRange write SetHorzRange;
    property LargeChange: Integer read FLargeChange write FLargeChange;
    property SmallChange: Integer read FSmallChange write FSmallChange;
    property VertPage: Integer read FVertPage write SetVertPage;
    property VertPosition: Integer read FVertPosition write SetVertPosition;
    property VertRange: Integer read FVertRange write SetVertRange;
  end;


implementation

{$R *.RES}
{$IFDEF Delphi6}
{$WARN SYMBOL_DEPRECATED OFF}
{$ENDIF}

uses frxPrinter, frxClass;

const
  fr01cm = 3.77953;
  fr01in = 96 / 10;

type
  THackScrollBar = class(TScrollBar);


{ Additional functions }

function Min(val1, val2: Word): Word;
begin
  Result := val1;
  if val1 > val2 then
    Result := val2;
end;

function GetFontMetrics(Font: TFont): TTextMetric;
var
  DC: HDC;
  SaveFont: HFont;
begin
  DC := GetDC(0);
  SaveFont := SelectObject(DC, Font.Handle);
  GetTextMetrics(DC, Result);
  SelectObject(DC, SaveFont);
  ReleaseDC(0, DC);
end;

function GetFontHeight(Font: TFont): Integer;
begin
  Result := GetFontMetrics(Font).tmHeight;
end;

function Blend(C1, C2: TColor; W1: Integer): TColor;
var
  W2, A1, A2, D, F, G: Integer;
begin
  if C1 < 0 then C1 := GetSysColor(C1 and $FF);
  if C2 < 0 then C2 := GetSysColor(C2 and $FF);

  if W1 >= 100 then D := 1000
  else D := 100;

  W2 := D - W1;
  F := D div 2;

  A2 := C2 shr 16 * W2;
  A1 := C1 shr 16 * W1;
  G := (A1 + A2 + F) div D and $FF;
  Result := G shl 16;

  A2 := (C2 shr 8 and $FF) * W2;
  A1 := (C1 shr 8 and $FF) * W1;
  G := (A1 + A2 + F) div D and $FF;
  Result := Result or G shl 8;

  A2 := (C2 and $FF) * W2;
  A1 := (C1 and $FF) * W1;
  G := (A1 + A2 + F) div D and $FF;
  Result := Result or G;
end;

{ TfrxCustomComboBox }

constructor TfrxCustomComboBox.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  FListInstance := MakeObjectInstance(ListWndProc);
  FDefListProc := nil;
  FButtonWidth := 11;
  ItemHeight := GetFontHeight(Font);
  Width := 100;
  FEditOffset := 0;
end;

destructor TfrxCustomComboBox.Destroy;
begin
  inherited Destroy;
  FreeObjectInstance(FListInstance);
end;

procedure TfrxCustomComboBox.SetReadOnly(Value: Boolean);
begin
  if FReadOnly <> Value then
  begin
    FReadOnly := Value;
    if HandleAllocated then
      SendMessage(EditHandle, EM_SETREADONLY, Ord(Value), 0);
  end;
end;

procedure TfrxCustomComboBox.CreateParams(var Params: TCreateParams);
begin
  inherited CreateParams(Params);
  with Params do
    Style := (Style and not CBS_DROPDOWNLIST) or CBS_OWNERDRAWFIXED or CBS_DROPDOWN;
end;

procedure TfrxCustomComboBox.CreateWnd;
begin
  inherited;
  SendMessage(EditHandle, EM_SETREADONLY, Ord(FReadOnly), 0);
  // Desiding, which of the handles is DropDown list handle...
  if FChildHandle <> EditHandle then
    FListHandle := FChildHandle;
  //.. and superclassing it
  FDefListProc := Pointer(GetWindowLong(FListHandle, GWL_WNDPROC));
  SetWindowLong(FListHandle, GWL_WNDPROC, Longint(FListInstance));
end;


procedure TfrxCustomComboBox.ListWndProc(var Message: TMessage);
var
  p: TPoint;

  procedure CallDefaultProc;
  begin
    with Message do
      Result := CallWindowProc(FDefListProc, FListHandle, Msg, WParam, LParam);
  end;

begin
  case Message.Msg of
    LB_SETTOPINDEX:
      begin
        if ItemIndex > DropDownCount then
          CallDefaultProc;
      end;
    WM_WINDOWPOSCHANGING:
      with TWMWindowPosMsg(Message).WindowPos^ do
      begin
        // calculating the size of the drop down list
        if FListWidth <> 0 then
          cx := FListWidth else
          cx := Width;
        cy := GetListHeight;
        p.x := cx;
        p.y := cy + GetFontHeight(Font) + 6;
        p := ClientToScreen(p);
        FUpDropdown := False;
        if p.y > Screen.Height then //if DropDownList showing below
          begin
            FUpDropdown := True;
          end;
      end;
    else
      CallDefaultProc;
  end;
end;

procedure TfrxCustomComboBox.WndProc(var Message: TMessage);
begin
  case Message.Msg of
    WM_SETTEXT:
      Invalidate;
     WM_PARENTNOTIFY:
       if LoWord(Message.wParam)=WM_CREATE then begin
         if FDefListProc <> nil then
           begin
             // This check is necessary to be sure that combo is created, not
             // RECREATED (somehow CM_RECREATEWND does not work)
             SetWindowLong(FListHandle, GWL_WNDPROC, Longint(FDefListProc));
             FDefListProc := nil;
             FChildHandle := Message.lParam;
           end
          else
           begin
             // WM_Create is the only event I found where I can get the ListBox handle.
             // The fact that combo box usually creates more then 1 handle complicates the
             // things, so I have to have the FChildHandle to resolve it later (in CreateWnd).
             if FChildHandle = 0 then
               FChildHandle := Message.lParam
             else
               FListHandle := Message.lParam;
           end;
       end;
    WM_WINDOWPOSCHANGING:
      MoveWindow(EditHandle, 3+FEditOffset, 3, Width-FButtonWidth-8-FEditOffset,
        Height-6, True);
  end;
  inherited;
end;

procedure TfrxCustomComboBox.WMPaint(var Message: TWMPaint);
var
  PS, PSE: TPaintStruct;
begin
  BeginPaint(Handle,PS);
  try
    if Enabled then
    begin
      DrawImage(PS.HDC, ItemIndex ,Rect(3, 3, FEditOffset + 3, Height - 3));
      if GetSolidBorder then
      begin
        PaintBorder(PS.HDC, True);
        if DroppedDown then
          PaintButton(2)
        else
          PaintButton(1);
      end else
      begin
        PaintBorder(PS.HDC, False);
        PaintButton(0);
      end;
    end else
    begin
      BeginPaint(EditHandle, PSE);
      try
        PaintDisabled;
      finally
        EndPaint(EditHandle, PSE);
      end;
    end;
  finally
    EndPaint(Handle,PS);
  end;
  Message.Result := 0;
end;

procedure TfrxCustomComboBox.DrawImage(DC: HDC; Index: Integer; R: TRect);
begin
  if FEditOffset > 0 then
   FillRect(DC, R, GetSysColorBrush(COLOR_WINDOW));
end;

procedure TfrxCustomComboBox.ComboWndProc(var Message: TMessage; ComboWnd: HWnd;
  ComboProc: Pointer);
var
  DC: HDC;
begin
  inherited;
  if (ComboWnd = EditHandle) then
    case Message.Msg of
      WM_SETFOCUS:
        begin
          DC:=GetWindowDC(Handle);
          PaintBorder(DC,True);
          PaintButton(1);
          ReleaseDC(Handle,DC);
        end;
      WM_KILLFOCUS:
        begin
          DC:=GetWindowDC(Handle);
          PaintBorder(DC,False);
          PaintButton(0);
          ReleaseDC(Handle,DC);
        end;
    end;
end;

procedure TfrxCustomComboBox.CNCommand(var Message: TWMCommand);
begin
  inherited;
  if (Message.NotifyCode in [CBN_CLOSEUP]) then
    PaintButton(1);
end;

procedure TfrxCustomComboBox.PaintBorder(DC: HDC; const SolidBorder: Boolean);
var
  R: TRect;
begin
  GetWindowRect(Handle, R);
  OffsetRect(R, -R.Left, -R.Top);
  if SolidBorder then
    FrameRect(DC, R, GetSysColorBrush(COLOR_HIGHLIGHT))
  else
    FrameRect(DC, R, GetSysColorBrush(COLOR_BTNFACE));
  InflateRect(R, -1, -1);
  FrameRect(DC, R, GetSysColorBrush(COLOR_WINDOW));
  InflateRect(R, -1, -1);
  R.Right:=R.Right - FButtonWidth - 2;
  FrameRect(DC, R, GetSysColorBrush(COLOR_WINDOW));
end;

procedure TfrxCustomComboBox.PaintButtonGlyph(DC: HDC; X: Integer; Y: Integer; Color: TColor);
var
  Pen, SavePen: HPEN;
begin
  Pen := CreatePen(PS_SOLID, 1, ColorToRGB(Color));
  SavePen := SelectObject(DC, Pen);
  MoveToEx(DC, X, Y, nil);
  LineTo(DC, X + 5, Y);
  MoveToEx(DC, X + 1, Y + 1, nil);
  LineTo(DC, X + 4, Y + 1);
  MoveToEx(DC, x + 2, Y + 2, nil);
  LineTo(DC, X + 3, Y + 2);
  SelectObject(DC, SavePen);
  DeleteObject(Pen);
end;

procedure TfrxCustomComboBox.PaintButton(ButtonStyle: Integer);
var
  R: TRect;
  DC: HDC;
  X, Y: Integer;

  procedure FillButton(DC: HDC; R: TRect; Color: TColor);
  var
    Brush, SaveBrush: HBRUSH;
  begin
    Brush := CreateSolidBrush(ColorToRGB(Color));
    SaveBrush := SelectObject(DC, Brush);
    FillRect(DC, R, Brush);
    SelectObject(DC, SaveBrush);
    DeleteObject(Brush);
  end;

  procedure PaintButtonLine(DC: HDC; Color: TColor);
  var
    Pen, SavePen: HPEN;
    R: TRect;
  begin
    GetWindowRect(Handle, R);
    OffsetRect (R, -R.Left, -R.Top);
    InflateRect(R, -FButtonWidth - 4, -1);
    Pen := CreatePen(PS_SOLID, 1, ColorToRGB(Color));
    SavePen := SelectObject(DC, Pen);
    MoveToEx(DC, R.Right, R.Top, nil);
    LineTo(DC, R.Right, R.Bottom);
    SelectObject(DC, SavePen);
    DeleteObject(Pen);
  end;

begin
  DC := GetWindowDC(Handle);
  X := Trunc(FButtonWidth / 2) + Width - FButtonWidth - 4;
  Y := Trunc((Height - 4) / 2) + 1;
  SetRect(R, Width - FButtonWidth - 3, 1, Width - 1, Height - 1);
  if ButtonStyle = 0 then //No 3D border
  begin
    FillButton(DC, R, clBtnFace);
    FrameRect(DC, R, GetSysColorBrush(COLOR_WINDOW));
    PaintButtonLine(DC, clWindow);
    PaintButtonGlyph(DC, X, Y, clBtnText);
  end;
  if ButtonStyle = 1 then //3D up border
  begin
    FillButton(DC, R, Blend(clHighlight, clWindow, 30));
    PaintButtonLine(DC, clHighlight);
    PaintButtonGlyph(DC, X, Y, clBtnText);
  end;
  if ButtonStyle = 2 then //3D down border
  begin
    FillButton(DC, R, Blend(clHighlight, clWindow, 50));
    PaintButtonLine(DC, clHighlight);
    PaintButtonGlyph(DC, X, Y, clCaptionText);
  end;
  ReleaseDC(Handle, DC);
end;

procedure TfrxCustomComboBox.PaintDisabled;
var
  R: TRect;
  Brush, SaveBrush: HBRUSH;
  DC: HDC;
  BtnShadowBrush: HBRUSH;
begin
  BtnShadowBrush := GetSysColorBrush(COLOR_BTNSHADOW);
  DC := GetWindowDC(Handle);
  Brush := CreateSolidBrush(GetSysColor(COLOR_BTNFACE));
  SaveBrush := SelectObject(DC, Brush);
  FillRect(DC, ClientRect, Brush);
  SelectObject(DC, SaveBrush);
  DeleteObject(Brush);
  GetWindowRect(Handle, R);
  OffsetRect(R, -R.Left, -R.Top);
  FrameRect(DC, R, BtnShadowBrush);
  PaintButtonGlyph(DC, Trunc(FButtonWidth / 2) + Width - FButtonWidth - 4,
    Trunc((Height - 4) / 2) + 1, clGrayText);
  ReleaseDC(Handle,DC);
end;

procedure TfrxCustomComboBox.CMEnabledChanged(var Msg: TMessage);
begin
  inherited;
  Invalidate;
end;

procedure TfrxCustomComboBox.CMMouseEnter(var Message: TMessage);
var
  DC: HDC;
begin
  inherited;
  msMouseInControl := True;
  if Enabled and not (GetFocus = EditHandle) and not DroppedDown then
  begin
    DC:=GetWindowDC(Handle);
    PaintBorder(DC, True);
    PaintButton(1);
    ReleaseDC(Handle, DC);
  end;
end;

procedure TfrxCustomComboBox.CMMouseLeave(var Message: TMessage);
var
  DC: HDC;
begin
  inherited;
  msMouseInControl := False;
  if Enabled  and not (GetFocus = EditHandle) and not DroppedDown then
  begin
    DC:=GetWindowDC(Handle);
    PaintBorder(DC, False);
    PaintButton(0);
    ReleaseDC(Handle, DC);
  end;
end;

function TfrxCustomComboBox.GetSolidBorder: Boolean;
begin
  Result := ((csDesigning in ComponentState)) or
    (DroppedDown or (GetFocus = EditHandle) or msMouseInControl);
end;

procedure TfrxCustomComboBox.KeyPress(var Key: Char);
var
 sPos, sLen: Integer;
begin
  inherited KeyPress(Key);
  if (ItemIndex >= 0) and (ItemIndex < Items.Count) then
  begin
    sPos := SelStart;
    sLen := SelLength;
    Text := Items[ItemIndex];
    SelStart := sPos;
    SelLength := sLen;
  end;
end;

function TfrxCustomComboBox.GetListHeight: Integer;
begin
  Result := ItemHeight * Min(DropDownCount, Items.Count) + 2;
  if (DropDownCount <= 0) or (Items.Count = 0) then
    Result := ItemHeight + 2;
end;

procedure TfrxCustomComboBox.CMFontChanged(var Message: TMessage);
begin
  inherited;
  ItemHeight := GetFontHeight(Font);
  RecreateWnd;
end;


{ TfrxFontComboBox }

function CreateBitmap(ResName: PChar): TBitmap;
begin
   Result := TBitmap.Create;
   Result.Handle := LoadBitmap(HInstance, ResName);
   if Result.Handle = 0 then
   begin
     Result.Free;
     Result := nil;
   end;
end;

function EnumFontsProc(var LogFont: TLogFont; var TextMetric: TTextMetric;
  FontType: Integer; Data: Pointer): Integer; stdcall;
begin
  if (TStrings(Data).IndexOf(LogFont.lfFaceName) < 0) then
    TStrings(Data).AddObject(LogFont.lfFaceName, TObject(FontType));
  Result := 1;
end;

constructor TfrxFontComboBox.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  if not (csDesigning in ComponentState) then
    frFontViewForm := TfrxFontPreview.Create(Self);
  FTrueTypeBMP := CreateBitmap('FRXTRUETYPE_FNT');
  FDeviceBMP := CreateBitmap('FRXDEVICE_FNT');
  DropDownCount := 12;
  Width := 150;
  FEditOffset := 16;
  FReadOnly := True;
  FShowMRU := True;
  Numused := -1;
  MRURegKey := '';
end;

destructor TfrxFontComboBox.Destroy;
begin
  FTrueTypeBMP.Free;
  FDeviceBMP.Free;
  if not (csDesigning in ComponentState) then
    frFontViewForm.Destroy;
  inherited Destroy;
end;

procedure TfrxFontComboBox.Loaded;
begin
  inherited Loaded;
  if csDesigning in ComponentState then exit;
  FUpdate := True;
  try
    PopulateList;
    if Items.IndexOf(Text) = -1 then
      ItemIndex:=0;
  finally
    FUpdate := False;
  end;
end;

procedure TfrxFontComboBox.SetRegKey(Value: String);
begin
  if Value = '' then
    FRegKey := '\Software\Fast Reports\MRUFont' else
    FRegKey := Value;
end;

procedure TfrxFontComboBox.PopulateList;
var
  LFont: TLogFont;
  DC: HDC;
  Reg: TRegistry;
  s: String;
  i: Integer;
  str: TStringList;
begin
  Sorted:=True;
  Items.BeginUpdate;
  str := TStringList.Create;
  str.Sorted := True;
  try
    Clear;
    DC := GetDC(0);
    try
      FillChar(LFont, sizeof(LFont), 0);
      LFont.lfCharset := DEFAULT_CHARSET;
      EnumFontFamiliesEx(DC, LFont, @EnumFontsProc, LongInt(str), 0);
    finally
      ReleaseDC(0, DC);
    end;
    if frxPrinters.HasPhysicalPrinters then
    try
      FillChar(LFont, sizeof(LFont), 0);
      LFont.lfCharset := DEFAULT_CHARSET;
      if frxPrinters.Printer <> nil then
        EnumFontFamiliesEx(frxPrinters.Printer.Canvas.Handle, LFont, @EnumFontsProc, LongInt(str), 0);
    except;
    end;
  finally
    Items.Assign(str);
    Items.EndUpdate;
  end;
  str.Free;
  Sorted := False;
  if FShowMRU then
  begin
    NumUsed := -1;
    Items.BeginUpdate;
    Reg:=TRegistry.Create;
    try
      Reg.OpenKey(FRegKey, True);
      for i := 4 downto 0 do
      begin
        s := Reg.ReadString('Font' + IntToStr(i));
        if (s <> '') and (Items.IndexOf(s) <> -1) then
        begin
          Items.InsertObject(0, s, TObject(Reg.ReadInteger('FontType' + IntToStr(i))));
          Inc(Numused);
        end else
        begin
          Reg.WriteString('Font' + IntToStr(i), '');
          Reg.WriteInteger('FontType' + IntToStr(i), 0);
        end;
      end;
    finally
      Reg.Free;
      Items.EndUpdate;
    end;
  end;
end;

procedure TfrxFontComboBox.DrawImage(DC: HDC; Index: Integer; R: TRect);
var
  C: TCanvas;
  Bitmap: TBitmap;
begin
  inherited;
  Index := Items.IndexOf(Text);
  if Index = -1 then exit;
  C := TCanvas.Create;
  C.Handle := DC;
  if (Integer(Items.Objects[Index]) and TRUETYPE_FONTTYPE) <> 0 then
    Bitmap := FTrueTypeBMP
  else if (Integer(Items.Objects[Index]) and DEVICE_FONTTYPE) <> 0 then
    Bitmap := FDeviceBMP
  else
    Bitmap := nil;
  if Bitmap <> nil then
  begin
    C.Brush.Color := clWindow;
    C.BrushCopy(Bounds(R.Left, (R.Top + R.Bottom - Bitmap.Height)
     div 2, Bitmap.Width, Bitmap.Height), Bitmap, Bounds(0, 0, Bitmap.Width,
     Bitmap.Height), Bitmap.TransparentColor);
  end;
  C.Free;
end;


procedure TfrxFontComboBox.DrawItem(Index: Integer; Rect: TRect;
  State: TOwnerDrawState);
var
  Bitmap: TBitmap;
  BmpWidth: Integer;
  Text: array[0..255] of Char;
begin
 if odSelected in State then
 begin
   frFontViewForm.FPanel.Caption:=self.Items[index];
   frFontViewForm.FPanel.Font.Name:=self.Items[index];
 end;
 with Canvas do
 begin
   BmpWidth  := 15;
   FillRect(Rect);
   if (Integer(Items.Objects[Index]) and TRUETYPE_FONTTYPE) <> 0 then
     Bitmap := FTrueTypeBMP
   else if (Integer(Items.Objects[Index]) and DEVICE_FONTTYPE) <> 0 then
     Bitmap := FDeviceBMP
   else
     Bitmap := nil;

   if Bitmap <> nil then
   begin
     BmpWidth := Bitmap.Width;
     BrushCopy(Bounds(Rect.Left+1 , (Rect.Top + Rect.Bottom - Bitmap.Height)
       div 2, Bitmap.Width, Bitmap.Height), Bitmap, Bounds(0, 0, Bitmap.Width,
       Bitmap.Height), Bitmap.TransparentColor);
   end;
   StrPCopy(Text, Items[Index]);
   Rect.Left := Rect.Left + BmpWidth + 2;
   DrawText(Canvas.Handle, Text, StrLen(Text), Rect,
{$IFDEF Delphi4}
   DrawTextBiDiModeFlags(DT_SINGLELINE or DT_VCENTER or DT_NOPREFIX));
{$ELSE}
   DT_SINGLELINE or DT_VCENTER or DT_NOPREFIX);
{$ENDIF}
   if (Index = Numused) then
   begin
     Pen.Color := clBtnShadow;
     MoveTo(0,Rect.Bottom - 2);
     LineTo(width, Rect.Bottom - 2);
   end;
   if (Index = Numused + 1) and (Numused <> -1) then
   begin
     Pen.Color := clBtnShadow;
     MoveTo(0, Rect.Top);
     LineTo(width, Rect.Top);
   end;
 end;
end;

procedure TfrxFontComboBox.CMFontChanged(var Message: TMessage);
begin
  inherited;
  Init;
end;

procedure TfrxFontComboBox.CMFontChange(var Message: TMessage);
begin
  inherited;
  Reset;
end;

procedure TfrxFontComboBox.Init;
begin
  if GetFontHeight(Font) > FTrueTypeBMP.Height then
    ItemHeight := GetFontHeight(Font)
  else
    ItemHeight := FTrueTypeBMP.Height + 1;
  RecreateWnd;
end;

procedure TfrxFontComboBox.Click;
begin
 inherited Click;
 if not (csReading in ComponentState) then
   if not FUpdate and Assigned(FOnClick) then FOnClick(Self);
end;

procedure TfrxFontComboBox.Reset;
begin
  if csDesigning in ComponentState then exit;
  FUpdate := True;
  try
    PopulateList;
    if Items.IndexOf(Text) = -1 then
      ItemIndex := 0;
  finally
    FUpdate := False;
  end;
end;

procedure TfrxFontComboBox.CNCommand(var Message: TWMCommand);
var
  pnt:TPoint;
  ind,i:integer;
  Reg: TRegistry;
begin
  inherited;
  if (Message.NotifyCode in [CBN_CLOSEUP]) then
  begin
    frFontViewForm.Visible := False;
    ind := itemindex;
    if (ItemIndex = -1) or (ItemIndex = 0) then exit;
    if FShowMRU then
    begin
      Items.BeginUpdate;
      if Items.IndexOf(Items[ind]) <= Numused then
      begin
        Items.Move(Items.IndexOf(Items[ind]), 0);
        ItemIndex := 0;
      end else
      begin
        Items.InsertObject(0, Items[ItemIndex], Items.Objects[ItemIndex]);
        Itemindex := 0;
        if Numused < 4 then
          Inc(Numused)
        else
          Items.Delete(5);
      end;
      Items.EndUpdate;
      Reg := TRegistry.Create;
      try
        Reg.OpenKey(FRegKey,True);
        for i := 0 to 4 do
          if i <= Numused then
          begin
           Reg.WriteString('Font' + IntToStr(i), Items[i]);
           Reg.WriteInteger('FontType' + IntToStr(i), Integer(Items.Objects[i]));
         end else
         begin
           Reg.WriteString('Font' + IntToStr(i), '');
           Reg.WriteInteger('FontType' + IntToStr(i), 0);
         end;
       finally
         Reg.Free;
       end;
    end;
  end;
  if (Message.NotifyCode in [CBN_DROPDOWN]) then
  begin
    if ItemIndex < 5 then
      PostMessage(FListHandle, LB_SETCURSEL, 0, 0);
    pnt.x := Self.Left + Self.Width;
    pnt.y := Self.Top + Self.Height;
    pnt := Parent.ClientToScreen(pnt);
    frFontViewForm.Top := pnt.y;
    frFontViewForm.Left := pnt.x + 1;

    if frFontViewForm.Left+frFontViewForm.Width > Screen.Width then
    begin
      pnt.x := Self.Left;
      pnt := Parent.ClientToScreen(pnt);
      frFontViewForm.Left := pnt.x - frFontViewForm.Width - 1;
    end;
    if FUpDropdown then
    begin
      pnt.y := Self.Top;
      pnt := Parent.ClientToScreen(pnt);
      frFontViewForm.Top := pnt.y - frFontViewForm.Height;
    end;
    frFontViewForm.Visible := True;
  end;
end;


{ TfrxFontPreview }

constructor TfrxFontPreview.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  Width := 200;
  Height := 50;
  Visible := False;
  Parent := AOwner as TWinControl;

  FPanel := TPanel.Create(Self);
  with FPanel do
  begin
    Parent := Self;
    Color := clWindow;
    Ctl3D := False;
    ParentCtl3D := False;
    BorderStyle := bsSingle;
    BevelInner := bvNone;
    BevelOuter := bvNone;
    Font.Color := clWindowText;
    Font.Size := 18;
    Align := alClient;
  end;
end;

destructor TfrxFontPreview.Destroy;
begin
  FPanel.Free;
  FPanel := nil;
  inherited Destroy;
end;

procedure TfrxFontPreview.CreateParams(var Params: TCreateParams);
begin
  inherited CreateParams( Params);
    with Params do begin
      Style := WS_POPUP or WS_CLIPCHILDREN;
      ExStyle := WS_EX_TOOLWINDOW;
      WindowClass.Style := WindowClass.Style or CS_SAVEBITS;
    end;
end;


{ TfrxComboEdit }

constructor TfrxComboEdit.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  Style := csSimple;
  Height := 21;
  FPanel := TPanel.Create(Self);
  FPanel.Parent := Self;
  FPanel.SetBounds(Width - Height + 2, 2, Height - 4, Height - 4);
  FButton := TSpeedButton.Create(Self);
  FButton.Parent := FPanel;
  FButton.SetBounds(0, 0, FPanel.Width, FPanel.Height);
  FButton.OnClick := ButtonClick;
  FButtonEnabled := True;
end;

procedure TfrxComboEdit.SetPos;
begin
  SetWindowPos(EditHandle, 0, 0, 0, Width - Height - 4, ItemHeight,
    SWP_NOMOVE or SWP_NOZORDER or SWP_NOACTIVATE)
end;

procedure TfrxComboEdit.CreateWnd;
begin
  inherited CreateWnd;
  SetPos;
end;

procedure TfrxComboEdit.WMSize(var Message: TWMSize);
begin
  inherited;
  FPanel.SetBounds(Width - Height + 2, 2, Height - 4, Height - 4);
end;

procedure TfrxComboEdit.CMEnabledChanged(var Message: TMessage);
begin
  inherited;
  FButton.Enabled := Enabled;
end;

procedure TfrxComboEdit.KeyPress(var Key: Char);
begin
  if (Key = Char(vk_Return)) or (Key = Char(vk_Escape)) then
    GetParentForm(Self).Perform(CM_DIALOGKEY, Byte(Key), 0);
  inherited KeyPress(Key);
end;

function TfrxComboEdit.GetGlyph: TBitmap;
begin
  Result := FButton.Glyph;
end;

procedure TfrxComboEdit.SetGlyph(Value: TBitmap);
begin
  FButton.Glyph := Value;
end;

function TfrxComboEdit.GetButtonHint: String;
begin
  Result := FButton.Hint;
end;

procedure TfrxComboEdit.SetButtonHint(Value: String);
begin
  FButton.Hint := Value;
end;

procedure TfrxComboEdit.SetButtonEnabled(Value: Boolean);
begin
  FButtonEnabled := Value;
  FButton.Enabled := Value;
end;

procedure TfrxComboEdit.ButtonClick(Sender: TObject);
begin
  SetFocus;
  if Assigned(FOnButtonClick) then
    FOnButtonClick(Self);
end;


{ TfrxScrollWin }

constructor TfrxScrollWin.Create(AOwner: TComponent);
begin
  inherited;
  FSmallChange := 1;
  FLargeChange := 10;
{$IFDEF Delphi7}
  ControlStyle := ControlStyle + [csNeedsBorderPaint];
{$ENDIF}
end;

procedure TfrxScrollWin.CreateParams(var Params: TCreateParams);
const
  BorderStyles: array[TBorderStyle] of DWORD = (0, WS_BORDER);
begin
  inherited;
  with Params do
  begin
    Style := Style or WS_CLIPCHILDREN or WS_HSCROLL or
      WS_VSCROLL or BorderStyles[FBorderStyle];
    if Ctl3D and NewStyleControls and (FBorderStyle = bsSingle) then
    begin
      Style := Style and not WS_BORDER;
      ExStyle := ExStyle or WS_EX_CLIENTEDGE;
    end;
  end;
end;

procedure TfrxScrollWin.SetBorderStyle(const Value: TBorderStyle);
begin
  FBorderStyle := Value;
  RecreateWnd;
end;

procedure TfrxScrollWin.WMEraseBackground(var Message: TMessage);
begin
end;

procedure TfrxScrollWin.WMGetDlgCode(var Message: TWMGetDlgCode);
begin
  Message.Result := DLGC_WANTARROWS or DLGC_WANTTAB or DLGC_WANTALLKEYS;
end;

function TfrxScrollWin.GetLongPosition(DefValue: Integer; Code: Word): Integer;
var
  ScrollInfo: TScrollInfo;
begin
  ScrollInfo.cbSize := SizeOf(TScrollInfo);
  ScrollInfo.fMask := SIF_TRACKPOS;
  Result := DefValue;
  if FlatSB_GetScrollInfo(Handle, Code, ScrollInfo) then
    Result := ScrollInfo.nTrackPos;
end;

procedure TfrxScrollWin.SetHorzPage(const Value: Integer);
begin
  FHorzPage := Value;
  HorzRange := HorzRange;
end;

procedure TfrxScrollWin.SetHorzPosition(Value: Integer);
begin
  if Value > FHorzRange - FHorzPage then
    Value := FHorzRange - FHorzPage;
  if Value < 0 then
    Value := 0;
  if Value <> FHorzPosition then
  begin
    FHorzPosition := Value;
    SetPosition(Value, SB_HORZ);
    OnHScrollChange(Self);
  end;
end;

procedure TfrxScrollWin.SetHorzRange(Value: Integer);
begin
  FHorzRange := Value;
  UpdateScrollBar(Value, HorzPage, HorzPosition, SB_HORZ);
end;

procedure TfrxScrollWin.SetVertPage(const Value: Integer);
begin
  FVertPage := Value;
  VertRange := VertRange;
end;

procedure TfrxScrollWin.SetVertPosition(Value: Integer);
begin
  if Value > FVertRange - FVertPage then
    Value := FVertRange - FVertPage;
  if Value < 0 then
    Value := 0;
  if Value <> FVertPosition then
  begin
    FVertPosition := Value;
    SetPosition(Value, SB_VERT);
    OnVScrollChange(Self);
  end;
end;

procedure TfrxScrollWin.SetVertRange(Value: Integer);
begin
  FVertRange := Value;
  UpdateScrollBar(Value, VertPage, VertPosition, SB_VERT);
end;

procedure TfrxScrollWin.SetPosition(Value: Integer; Code: Word);
begin
  FlatSB_SetScrollPos(Handle, Code, Value, True);
end;

procedure TfrxScrollWin.UpdateScrollBar(Max, Page, Pos: Integer; Code: Word);
var
  ScrollInfo: TScrollInfo;
begin
  ScrollInfo.cbSize := SizeOf(ScrollInfo);
  ScrollInfo.fMask := SIF_ALL;
  ScrollInfo.nMin := 0;
  if Max < Page then
    Max := 0;
  ScrollInfo.nMax := Max;
  ScrollInfo.nPage := Page;
  ScrollInfo.nPos := Pos;
  ScrollInfo.nTrackPos := Pos;
  FlatSB_SetScrollInfo(Handle, Code, ScrollInfo, True);
end;

procedure TfrxScrollWin.Paint;
begin
  with Canvas do
  begin
    Brush.Color := Color;
    FillRect(Rect(0, 0, ClientWidth, ClientHeight));
  end;
end;

procedure TfrxScrollWin.WMHScroll(var Message: TWMHScroll);
begin
  case Message.ScrollCode of
    SB_LINEUP: HorzPosition := HorzPosition - FSmallChange;
    SB_LINEDOWN: HorzPosition := HorzPosition + FSmallChange;
    SB_PAGEUP: HorzPosition := HorzPosition - FLargeChange;
    SB_PAGEDOWN: HorzPosition := HorzPosition + FLargeChange;
    SB_THUMBPOSITION, SB_THUMBTRACK:
      HorzPosition := GetLongPosition(Message.Pos, SB_HORZ);
    SB_TOP: HorzPosition := 0;
    SB_BOTTOM: HorzPosition := HorzRange;
  end;
end;

procedure TfrxScrollWin.WMVScroll(var Message: TWMVScroll);
begin
  case Message.ScrollCode of
    SB_LINEUP: VertPosition := VertPosition - FSmallChange;
    SB_LINEDOWN: VertPosition := VertPosition + FSmallChange;
    SB_PAGEUP: VertPosition := VertPosition - FLargeChange;
    SB_PAGEDOWN: VertPosition := VertPosition + FLargeChange;
    SB_THUMBPOSITION, SB_THUMBTRACK:
      VertPosition := GetLongPosition(Message.Pos, SB_VERT);
    SB_TOP: VertPosition := 0;
    SB_BOTTOM: VertPosition := VertRange;
  end;
end;

procedure TfrxScrollWin.OnHScrollChange(Sender: TObject);
begin
end;

procedure TfrxScrollWin.OnVScrollChange(Sender: TObject);
begin
end;


end.



