{*******************************************************}
{                                                       }
{         Delphi VCL Extensions (RX)                    }
{                                                       }
{         Copyright (c) 1996 AO ROSNO                   }
{         Copyright (c) 1997, 1998 Master-Bank          }
{                                                       }
{ Patched by Polaris Software                           }
{*******************************************************}

unit RXGrids;

{$I RX.INC}
{$W-,T-}

interface

uses
  Windows, Registry,
  Messages, Classes, Controls, Graphics, StdCtrls, ExtCtrls, Forms, Menus,
  Grids, RxConst, IniFiles, rxPlacemnt;

{ TRxDrawGrid }

type
  TAcceptKeyEvent = function (Sender: TObject; var Key: Char): Boolean of object;
  TEditLimitEvent = procedure (Sender: TObject; var MaxLength: Integer) of object;
  TEditShowEvent = procedure (Sender: TObject; ACol, ARow: Longint;
    var AllowEdit: Boolean) of object;
  TFixedCellClickEvent = procedure (Sender: TObject; ACol, ARow: Longint) of object;
  TFixedCellCheckEvent = procedure (Sender: TObject; ACol, ARow: Longint;
    var Enabled: Boolean) of object;
  TInplaceEditStyle = (ieSimple, ieEllipsis, iePickList);
  TEditAlignEvent = procedure (Sender: TObject; ACol, ARow: Longint;
    var Alignment: TAlignment) of object;
  TPicklistEvent = procedure (Sender: TObject; ACol, ARow: Longint;
    PickList: TStrings) of object;
  TEditStyleEvent = procedure (Sender: TObject; ACol, ARow: Longint;
    var Style: TInplaceEditStyle) of object;

  TRxDrawGrid = class(TDrawGrid)
  private
    FNoUpdateData: Boolean;
    FFixedCellsButtons: Boolean;
    FPressedCell: TGridCoord;
    FPressed: Boolean;
    FTracking: Boolean;
    FSwapButtons: Boolean;
    FDefaultDrawing: Boolean;
    FIniLink: TIniLink;
    FOnColumnSized: TNotifyEvent;
    FOnRowSized: TNotifyEvent;
    FOnAcceptEditKey: TAcceptKeyEvent;
    FOnGetEditLimit: TEditLimitEvent;
    FOnEditChange: TNotifyEvent;
    FOnShowEditor: TEditShowEvent;
    FOnCancelEdit: TNotifyEvent;
    FOnFixedCellClick: TFixedCellClickEvent;
    FOnCheckButton: TFixedCellCheckEvent;
    FOnChangeFocus: TNotifyEvent;
    FOnGetEditAlign: TEditAlignEvent;
    FOnEditButtonClick: TNotifyEvent;
    FOnGetPicklist: TPicklistEvent;
    FOnGetEditStyle: TEditStyleEvent;
    function GetStorage: TFormPlacement;
    procedure SetStorage(Value: TFormPlacement);
    procedure IniSave(Sender: TObject);
    procedure IniLoad(Sender: TObject);
    procedure SetFixedButtons(Value: Boolean);
    procedure StopTracking;
    procedure TrackButton(X, Y: Integer);
    function IsActiveControl: Boolean;
    procedure WMCommand(var Message: TWMCommand); message WM_COMMAND;
    procedure WMCancelMode(var Message: TMessage); message WM_CANCELMODE;
    procedure WMLButtonDblClk(var Message: TWMLButtonDblClk); message WM_LBUTTONDBLCLK;
    procedure WMKillFocus(var Msg: TWMKillFocus); message WM_KILLFOCUS;
    procedure WMSetFocus(var Msg: TWMSetFocus); message WM_SETFOCUS;
    procedure WMRButtonUp(var Message: TWMMouse); message WM_RBUTTONUP;
  protected
    function CanEditAcceptKey(Key: Char): Boolean; override;
    function CanEditShow: Boolean; override;
    function GetEditLimit: Integer; override;
    procedure TopLeftChanged; override;
    procedure ColWidthsChanged; override;
    procedure RowHeightsChanged; override;
    procedure CallDrawCellEvent(ACol, ARow: Longint; ARect: TRect;
      AState: TGridDrawState);
    procedure DrawCell(ACol, ARow: Longint; ARect: TRect;
      AState: TGridDrawState); override;
    procedure DoDrawCell(ACol, ARow: Longint; ARect: TRect;
      AState: TGridDrawState); virtual;
    procedure KeyDown(var Key: Word; Shift: TShiftState); 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 SetEditText(ACol, ARow: Longint; const Value: string); override;
    function CreateEditor: TInplaceEdit; override;
    procedure Paint; override;
    procedure EditChanged(Sender: TObject); dynamic;
    procedure DoFixedCellClick(ACol, ARow: Longint); dynamic;
    procedure CheckFixedCellButton(ACol, ARow: Longint;
      var Enabled: Boolean); dynamic;
    procedure EditButtonClick; dynamic;
    function GetEditAlignment(ACol, ARow: Longint): TAlignment; dynamic;
    function GetEditStyle(ACol, ARow: Longint): TInplaceEditStyle;
      {$IFDEF RX_D6} reintroduce; {$ELSE} dynamic; {$ENDIF} // Polaris
    procedure GetPicklist(ACol, ARow: Longint; Picklist: TStrings); dynamic;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure DrawStr(ARect: TRect; const S: string; Align: TAlignment);
    procedure DrawMultiline(ARect: TRect; const S: string; Align: TAlignment);
    procedure DrawPicture(ARect: TRect; Graphic: TGraphic);
    procedure DrawMasked(ARect: TRect; Graphic: TBitmap);
    procedure InvalidateCell(ACol, ARow: Longint);
    procedure InvalidateCol(ACol: Longint);
    procedure InvalidateRow(ARow: Longint);
    property InplaceEditor;
  published
    property DefaultRowHeight default 18;
    property Options default [goFixedVertLine, goFixedHorzLine, goVertLine,
      goHorzLine, goDrawFocusSelected, goColSizing];
    property IniStorage: TFormPlacement read GetStorage write SetStorage;
    property FixedButtons: Boolean read FFixedCellsButtons write SetFixedButtons
      default False;
    property OnAcceptEditKey: TAcceptKeyEvent read FOnAcceptEditKey
      write FOnAcceptEditKey;
    property OnCancelEdit: TNotifyEvent read FOnCancelEdit write FOnCancelEdit;
    property OnCheckButton: TFixedCellCheckEvent read FOnCheckButton
      write FOnCheckButton;
    property OnChangeFocus: TNotifyEvent read FOnChangeFocus write FOnChangeFocus;
    property OnFixedCellClick: TFixedCellClickEvent read FOnFixedCellClick
      write FOnFixedCellClick;
    property OnColumnSized: TNotifyEvent read FOnColumnSized
      write FOnColumnSized;
    property OnRowSized: TNotifyEvent read FOnRowSized write FOnRowSized;
    property OnGetEditLimit: TEditLimitEvent read FOnGetEditLimit write FOnGetEditLimit;
    property OnEditChange: TNotifyEvent read FOnEditChange write FOnEditChange;
    property OnShowEditor: TEditShowEvent read FOnShowEditor write FOnShowEditor;
    property OnGetEditAlign: TEditAlignEvent read FOnGetEditAlign write FOnGetEditAlign;
    property OnGetEditStyle: TEditStyleEvent read FOnGetEditStyle write FOnGetEditStyle;
    property OnGetPicklist: TPicklistEvent read FOnGetPicklist write FOnGetPicklist;
    property OnEditButtonClick: TNotifyEvent read FOnEditButtonClick write FOnEditButtonClick;
  end;

implementation

uses
  SysUtils, rxVCLUtils, rxMaxMin, Consts, rxAppUtils;

const
  MaxCustomExtents = MaxListSize;
  MaxShortInt = High(ShortInt);

type
  PIntArray = ^TIntArray;
  TIntArray = array[0..MaxCustomExtents] of Integer;

{ TRxInplaceEdit }

type
  TPopupListbox = class;

  TRxInplaceEdit = class(TInplaceEdit)
  private
    FAlignment: TAlignment;
    FButtonWidth: Integer;
    FPickList: TPopupListbox;
    FActiveList: TWinControl;
    FEditStyle: TInplaceEditStyle;
    FListVisible: Boolean;
    FTracking: Boolean;
    FPressed: Boolean;
    procedure ListMouseUp(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure SetAlignment(Value: TAlignment);
    procedure SetEditStyle(Value: TInplaceEditStyle);
    procedure StopTracking;
    procedure TrackButton(X,Y: Integer);
    procedure CMCancelMode(var Message: TCMCancelMode); message CM_CANCELMODE;
    procedure WMCancelMode(var Message: TMessage); message WM_CANCELMODE;
    procedure WMKillFocus(var Message: TMessage); message WM_KILLFOCUS;
    procedure WMLButtonDblClk(var Message: TWMLButtonDblClk); message WM_LBUTTONDBLCLK;
    procedure WMPaint(var Message: TWMPaint); message WM_PAINT;
    procedure WMSetCursor(var Message: TWMSetCursor); message WM_SETCURSOR;
  protected
    procedure CreateParams(var Params: TCreateParams); override;
    procedure BoundsChanged; override;
    procedure CloseUp(Accept: Boolean);
    procedure DoDropDownKeys(var Key: Word; Shift: TShiftState);
    procedure DropDown;
    procedure KeyDown(var Key: Word; Shift: TShiftState); 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 PaintWindow(DC: HDC); override;
    procedure UpdateContents; override;
    procedure WndProc(var Message: TMessage); override;
    property ActiveList: TWinControl read FActiveList write FActiveList;
    property PickList: TPopupListbox read FPickList;
  public
    constructor Create(Owner: TComponent); override;
    property Alignment: TAlignment read FAlignment write SetAlignment;
    property EditStyle: TInplaceEditStyle read FEditStyle write SetEditStyle;
  end;

{ TPopupListbox }

  TPopupListbox = class(TCustomListbox)
  private
    FSearchText: string;
    FSearchTickCount: Longint;
  protected
    procedure CreateParams(var Params: TCreateParams); override;
    procedure CreateWnd; override;
    procedure KeyPress(var Key: Char); override;
    procedure MouseUp(Button: TMouseButton; Shift: TShiftState; X, Y: Integer); override;
  end;

procedure TPopupListBox.CreateParams(var Params: TCreateParams);
begin
  inherited CreateParams(Params);
  with Params do begin
    Style := Style or WS_BORDER;
    ExStyle := WS_EX_TOOLWINDOW or WS_EX_TOPMOST;
{$IFDEF RX_D4}
    AddBiDiModeExStyle(ExStyle);
{$ENDIF}
    WindowClass.Style := CS_SAVEBITS;
  end;
end;

procedure TPopupListbox.CreateWnd;
begin
  inherited CreateWnd;
  Windows.SetParent(Handle, 0);
  CallWindowProc(DefWndProc, Handle, WM_SETFOCUS, 0, 0);
end;

procedure TPopupListbox.KeyPress(var Key: Char);
var
  TickCount: Integer;
begin
  case Key of
    #8, #27: FSearchText := '';
    #32..#255:
      begin
        TickCount := GetTickCount;
        if TickCount - FSearchTickCount > 4000 then
          FSearchText := '';
        FSearchTickCount := TickCount;
        if Length(FSearchText) < 32 then
          FSearchText := FSearchText + Key;
        SendMessage(Handle, LB_SELECTSTRING, WORD(-1),
          Longint(PChar(FSearchText)));
        Key := #0;
      end;
  end;
  inherited KeyPress(Key);
end;

procedure TPopupListbox.MouseUp(Button: TMouseButton; Shift: TShiftState;
  X, Y: Integer);
begin
  inherited MouseUp(Button, Shift, X, Y);
  TRxInplaceEdit(Owner).CloseUp((X >= 0) and (Y >= 0) and (X < Width) and
    (Y < Height));
end;

{ TRxInplaceEdit }

constructor TRxInplaceEdit.Create(Owner: TComponent);
begin
  inherited Create(Owner);
  FButtonWidth := GetSystemMetrics(SM_CXVSCROLL);
  FEditStyle := ieSimple;
end;

procedure TRxInplaceEdit.CreateParams(var Params: TCreateParams);
const
  Alignments: array[TAlignment] of {$IFDEF RX_D4}DWORD{$ELSE}Longint{$ENDIF} =
    (ES_LEFT, ES_RIGHT, ES_CENTER);
begin
  inherited CreateParams(Params);
  with Params do
    Style := Style or Alignments[FAlignment];
end;

procedure TRxInplaceEdit.BoundsChanged;
var
  R: TRect;
begin
  SetRect(R, 2, 2, Width - 2, Height);
  if FEditStyle <> ieSimple then
    Dec(R.Right, FButtonWidth);
  SendMessage(Handle, EM_SETRECTNP, 0, LongInt(@R));
  SendMessage(Handle, EM_SCROLLCARET, 0, 0);
{$IFDEF RX_D3}
  if SysLocale.FarEast then
    SetImeCompositionWindow(Font, R.Left, R.Top);
{$ENDIF}
end;

procedure TRxInplaceEdit.CloseUp(Accept: Boolean);
var
  ListValue: string;
begin
  if FListVisible then
  begin
    if GetCapture <> 0 then
      SendMessage(GetCapture, WM_CANCELMODE, 0, 0);
    if FPickList.ItemIndex > -1 then
      ListValue := FPickList.Items[FPicklist.ItemIndex];
    SetWindowPos(FActiveList.Handle, 0, 0, 0, 0, 0, SWP_NOZORDER or
      SWP_NOMOVE or SWP_NOSIZE or SWP_NOACTIVATE or SWP_HIDEWINDOW);
    FListVisible := False;
    Invalidate;
    if Accept and EditCanModify then
      Text := ListValue;
  end;
end;

procedure TRxInplaceEdit.DoDropDownKeys(var Key: Word; Shift: TShiftState);
begin
  case Key of
    VK_UP, VK_DOWN:
      if ssAlt in Shift then
      begin
        if FListVisible then
          CloseUp(True)
        else
          DropDown;
        Key := 0;
      end;
    VK_RETURN, VK_ESCAPE:
      if FListVisible and not (ssAlt in Shift) then
      begin
        CloseUp(Key = VK_RETURN);
        Key := 0;
      end;
  end;
end;

procedure TRxInplaceEdit.DropDown;
const
  MaxListCount = 8;
var
  P: TPoint;
  Y, J, I: Integer;
begin
  if not FListVisible and Assigned(FActiveList) then
  begin
    FPickList.Width := Width;
    FPickList.Color := Color;
    FPickList.Font := Font;
    FPickList.Items.Clear;
    with TRxDrawGrid(Grid) do
      GetPickList(Col, Row, FPickList.Items);
    FPickList.Height := Min(FPickList.Items.Count, MaxListCount) *
      FPickList.ItemHeight + 4;
    FPickList.ItemIndex := FPickList.Items.IndexOf(Text);
    J := FPickList.ClientWidth;
    for I := 0 to FPickList.Items.Count - 1 do
    begin
      Y := FPickList.Canvas.TextWidth(FPickList.Items[I]);
      if Y > J then
        J := Y;
    end;
    if FPickList.Items.Count > MaxListCount then
      Inc(J, GetSystemMetrics(SM_CXVSCROLL));
    FPickList.ClientWidth := J;
    P := Parent.ClientToScreen(Point(Left, Top));
    Y := P.Y + Height;
    if Y + FActiveList.Height > Screen.Height then
      Y := P.Y - FActiveList.Height;
    SetWindowPos(FActiveList.Handle, HWND_TOP, P.X, Y, 0, 0,
      SWP_NOSIZE or SWP_NOACTIVATE or SWP_SHOWWINDOW);
    FListVisible := True;
    Invalidate;
    Windows.SetFocus(Handle);
  end;
end;

type
  TWinControlCracker = class(TWinControl);

procedure TRxInplaceEdit.KeyDown(var Key: Word; Shift: TShiftState);
begin
  if (EditStyle = ieEllipsis) and (Key = VK_RETURN) and (Shift = [ssCtrl]) then
  begin
    TRxDrawGrid(Grid).EditButtonClick;
    KillMessage(Handle, WM_CHAR);
  end
  else
    inherited KeyDown(Key, Shift);
end;

procedure TRxInplaceEdit.ListMouseUp(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
  if Button = mbLeft then
    CloseUp(PtInRect(FActiveList.ClientRect, Point(X, Y)));
end;

procedure TRxInplaceEdit.MouseDown(Button: TMouseButton; Shift: TShiftState;
  X, Y: Integer);
begin
  if (Button = mbLeft) and (FEditStyle <> ieSimple) and
    PtInRect(Rect(Width - FButtonWidth, 0, Width, Height), Point(X,Y)) then
  begin
    if FListVisible then
      CloseUp(False)
    else
    begin
      MouseCapture := True;
      FTracking := True;
      TrackButton(X, Y);
      if Assigned(FActiveList) then DropDown;
    end;
  end;
  inherited MouseDown(Button, Shift, X, Y);
end;

procedure TRxInplaceEdit.MouseMove(Shift: TShiftState; X, Y: Integer);
var
  ListPos: TPoint;
  MousePos: TSmallPoint;
begin
  if FTracking then
  begin
    TrackButton(X, Y);
    if FListVisible then
    begin
      ListPos := FActiveList.ScreenToClient(ClientToScreen(Point(X, Y)));
      if PtInRect(FActiveList.ClientRect, ListPos) then
      begin
        StopTracking;
        MousePos := PointToSmallPoint(ListPos);
        SendMessage(FActiveList.Handle, WM_LBUTTONDOWN, 0, Integer(MousePos));
        Exit;
      end;
    end;
  end;
  inherited MouseMove(Shift, X, Y);
end;

procedure TRxInplaceEdit.MouseUp(Button: TMouseButton; Shift: TShiftState;
  X, Y: Integer);
var
  WasPressed: Boolean;
begin
  WasPressed := FPressed;
  StopTracking;
  if (Button = mbLeft) and (FEditStyle = ieEllipsis) and WasPressed then
    TRxDrawGrid(Grid).EditButtonClick;
  inherited MouseUp(Button, Shift, X, Y);
end;

procedure TRxInplaceEdit.PaintWindow(DC: HDC);
const
  LeftOffs = 3;
var
  R: TRect;
  Flags: Integer;
  W, G, I: Integer;
begin
  if FEditStyle <> ieSimple then
  begin
    SetRect(R, Width - FButtonWidth, 0, Width, Height);
    Flags := 0;
    if FEditStyle in [iePickList] then
    begin
      if FActiveList = nil then
        Flags := DFCS_INACTIVE
      else
        if FPressed then
          Flags := DFCS_FLAT or DFCS_PUSHED;
      DrawFrameControl(DC, R, DFC_SCROLL, Flags or DFCS_SCROLLCOMBOBOX);
    end
    else
    begin { ieEllipsis }
      if FPressed then
        Flags := BF_FLAT;
      DrawEdge(DC, R, EDGE_RAISED, BF_RECT or BF_MIDDLE or Flags);
      W := 2;
      G := (FButtonWidth - LeftOffs * 2 - 3 * W) div 2;
      if G <= 0 then
        G := 1;
      if G > 3 then
        G := 3;
      Flags := R.Left + (FButtonWidth - 3 * W - 2 * G) div 2 + Ord(FPressed);
      I := R.Top + (ClientHeight - W) div 2 {+ Ord(FPressed)};
      PatBlt(DC, Flags, I, W, W, BLACKNESS);
      PatBlt(DC, Flags + G + W, I, W, W, BLACKNESS);
      PatBlt(DC, Flags + 2 * G + 2 * W, I, W, W, BLACKNESS);
    end;
    ExcludeClipRect(DC, R.Left, R.Top, R.Right, R.Bottom);
  end;
  inherited PaintWindow(DC);
end;

procedure TRxInplaceEdit.SetAlignment(Value: TAlignment);
begin
  if FAlignment <> Value then
  begin
    FAlignment := Value;
    RecreateWnd;
  end;
end;

procedure TRxInplaceEdit.SetEditStyle(Value: TInplaceEditStyle);
begin
  if Value = FEditStyle then
    Exit;
  FEditStyle := Value;
  case Value of
    iePickList:
      begin
        if FPickList = nil then
        begin
          FPickList := TPopupListbox.Create(Self);
          FPickList.Visible := False;
          FPickList.Parent := Self;
          FPickList.OnMouseUp := ListMouseUp;
          FPickList.IntegralHeight := True;
          FPickList.ItemHeight := 11;
        end;
        FActiveList := FPickList;
      end;
    else
      FActiveList := nil;
  end;
  Repaint;
end;

procedure TRxInplaceEdit.StopTracking;
begin
  if FTracking then
  begin
    TrackButton(-1, -1);
    FTracking := False;
    MouseCapture := False;
  end;
end;

procedure TRxInplaceEdit.TrackButton(X,Y: Integer);
var
  NewState: Boolean;
  R: TRect;
begin
  SetRect(R, ClientWidth - FButtonWidth, 0, ClientWidth, ClientHeight);
  NewState := PtInRect(R, Point(X, Y));
  if FPressed <> NewState then
  begin
    FPressed := NewState;
    InvalidateRect(Handle, @R, False);
  end;
end;

procedure TRxInplaceEdit.UpdateContents;
var
  SaveChanged: TNotifyEvent;
begin
  with TRxDrawGrid(Grid) do
  begin
    Self.Alignment := GetEditAlignment(Col, Row);
    EditStyle := GetEditStyle(Col, Row);
  end;
  SaveChanged := Self.OnChange;
  try
    Self.OnChange := nil;
    inherited UpdateContents;
  finally
    Self.OnChange := SaveChanged;
  end;
end;

procedure TRxInplaceEdit.CMCancelMode(var Message: TCMCancelMode);
begin
  if (Message.Sender <> Self) and (Message.Sender <> FActiveList) then
    CloseUp(False);
end;

procedure TRxInplaceEdit.WMCancelMode(var Message: TMessage);
begin
  StopTracking;
  inherited;
end;

procedure TRxInplaceEdit.WMKillFocus(var Message: TMessage);
begin
{$IFDEF RX_D3}
  if not SysLocale.FarEast then
    inherited
  else
  begin
    ImeName := Screen.DefaultIme;
    ImeMode := imDontCare;
    inherited;
    if THandle(Message.WParam) <> TRxDrawGrid(Grid).Handle then
      ActivateKeyboardLayout(Screen.DefaultKbLayout, KLF_ACTIVATE);
  end;
{$ELSE}
  inherited;
{$ENDIF}
  CloseUp(False);
end;

procedure TRxInplaceEdit.WMLButtonDblClk(var Message: TWMLButtonDblClk);
begin
  with Message do
    if (FEditStyle <> ieSimple) and PtInRect(Rect(Width - FButtonWidth, 0,
      Width, Height), Point(XPos, YPos)) then
        Exit;
  inherited;
end;

procedure TRxInplaceEdit.WMPaint(var Message: TWMPaint);
begin
  PaintHandler(Message);
end;

procedure TRxInplaceEdit.WMSetCursor(var Message: TWMSetCursor);
var
  P: TPoint;
begin
  GetCursorPos(P);
  if (FEditStyle <> ieSimple) and
    PtInRect(Rect(Width - FButtonWidth, 0, Width, Height), ScreenToClient(P)) then
    Windows.SetCursor(LoadCursor(0, IDC_ARROW))
  else
    inherited;
end;

procedure TRxInplaceEdit.WndProc(var Message: TMessage);
begin
  case Message.Msg of
    WM_KEYDOWN, WM_SYSKEYDOWN, WM_CHAR:
      if EditStyle in [iePickList] then
        with TWMKey(Message) do
        begin
          DoDropDownKeys(CharCode, KeyDataToShiftState(KeyData));
          if (CharCode <> 0) and FListVisible then
          begin
            with TMessage(Message) do
              SendMessage(FActiveList.Handle, Msg, WParam, LParam);
            Exit;
          end;
        end;
  end;
  inherited;
end;

{ TRxDrawGrid }

constructor TRxDrawGrid.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  DefaultRowHeight := 18;
  Options := [goFixedVertLine, goFixedHorzLine, goVertLine, goHorzLine,
    goDrawFocusSelected, goColSizing];
  FIniLink := TIniLink.Create;
  FIniLink.OnSave := IniSave;
  FIniLink.OnLoad := IniLoad;
  FPressedCell.X := -1;
  FPressedCell.Y := -1;
end;

destructor TRxDrawGrid.Destroy;
begin
  FOnChangeFocus := nil;
  FIniLink.Free;
  inherited Destroy;
end;

function TRxDrawGrid.GetStorage: TFormPlacement;
begin
  Result := FIniLink.Storage;
end;

procedure TRxDrawGrid.SetStorage(Value: TFormPlacement);
begin
  FIniLink.Storage := Value;
end;

procedure TRxDrawGrid.IniSave(Sender: TObject);
begin
  if (Name <> '') and (FIniLink.IniObject <> nil) then
    InternalSaveGridLayout(Self, FIniLink.IniObject, FIniLink.RootSection +
      GetDefaultSection(Self));
end;

procedure TRxDrawGrid.IniLoad(Sender: TObject);
begin
  if (Name <> '') and (FIniLink.IniObject <> nil) then
    InternalRestoreGridLayout(Self, FIniLink.IniObject, FIniLink.RootSection +
      GetDefaultSection(Self));
end;

function TRxDrawGrid.CanEditAcceptKey(Key: Char): Boolean;
begin
  if Assigned(FOnAcceptEditKey) then
    Result := FOnAcceptEditKey(Self, Key)
  else
    Result := inherited CanEditAcceptKey(Key);
end;

function TRxDrawGrid.CanEditShow: Boolean;
begin
  Result := inherited CanEditShow;
  if Result and Assigned(FOnShowEditor) then
  begin
    FOnShowEditor(Self, Col, Row, Result);
    if not Result then
      EditorMode := False;
  end;
end;

procedure TRxDrawGrid.DrawPicture(ARect: TRect; Graphic: TGraphic);
begin
  DrawCellBitmap(Self, 0, 0, Graphic, ARect);
end;

procedure TRxDrawGrid.DrawMasked(ARect: TRect; Graphic: TBitmap);
var
  X, Y: Integer;
begin
  X := (ARect.Right + ARect.Left - Graphic.Width) div 2;
  Y := (ARect.Bottom + ARect.Top - Graphic.Height) div 2;
  DrawBitmapTransparent(Canvas, X, Y, Graphic, Graphic.TransparentColor
    and not PaletteMask);
end;

procedure TRxDrawGrid.DrawStr(ARect: TRect; const S: string;
  Align: TAlignment);
begin
  DrawCellTextEx(Self, 0, 0, S, ARect, Align, vaCenter, False
    {$IFDEF RX_D4}, IsRightToLeft {$ENDIF});
end;

procedure TRxDrawGrid.DrawMultiline(ARect: TRect; const S: string;
  Align: TAlignment);
begin
  DrawCellTextEx(Self, 0, 0, S, ARect, Align, vaTopJustify, True
    {$IFDEF RX_D4}, IsRightToLeft {$ENDIF});
end;

procedure TRxDrawGrid.InvalidateCell(ACol, ARow: Longint);
begin
  inherited InvalidateCell(ACol, ARow);
end;

procedure TRxDrawGrid.InvalidateCol(ACol: Longint);
begin
  inherited InvalidateCol(ACol);
end;

procedure TRxDrawGrid.InvalidateRow(ARow: Longint);
var
  I: Longint;
begin
  for I := 0 to ColCount - 1 do
    inherited InvalidateCell(I, ARow);
end;

procedure TRxDrawGrid.KeyDown(var Key: Word; Shift: TShiftState);
begin
  if not CanGridAcceptKey(Key, Shift) then
    Exit;
  if not (ssCtrl in Shift) and (Key = VK_ESCAPE) and EditorMode and
    (InplaceEditor <> nil) and InplaceEditor.Visible and
    not (goAlwaysShowEditor in Options) then
  begin
    FNoUpdateData := True;
    try
      HideEditor;
      if Assigned(FOnCancelEdit) then FOnCancelEdit(Self);
    finally
      FNoUpdateData := False;
    end;
  end
  else
    inherited KeyDown(Key, Shift);
end;

procedure TRxDrawGrid.WMCommand(var Message: TWMCommand);
begin
  if (Message.NotifyCode = EN_CHANGE) and
    not (goAlwaysShowEditor in Options) then
  begin
    if (InplaceEditor <> nil) and InplaceEditor.HandleAllocated and
      InplaceEditor.Visible then TRxInplaceEdit(InplaceEditor).Change;
    Message.NotifyCode := 0;
  end;
  inherited;
end;

procedure TRxDrawGrid.EditChanged(Sender: TObject);
begin
  if Assigned(FOnEditChange) then
    FOnEditChange(Self);
end;

function TRxDrawGrid.GetEditLimit: Integer;
begin
  Result := inherited GetEditLimit;
  if Assigned(FOnGetEditLimit) then
    FOnGetEditLimit(Self, Result);
end;

procedure TRxDrawGrid.SetEditText(ACol, ARow: Longint; const Value: string);
begin
  if not FNoUpdateData then
    inherited SetEditText(ACol, ARow, Value);
end;

procedure TRxDrawGrid.SetFixedButtons(Value: Boolean);
begin
  if FFixedCellsButtons <> Value then
  begin
    FFixedCellsButtons := Value;
    Invalidate;
  end;
end;

procedure TRxDrawGrid.DoFixedCellClick(ACol, ARow: Longint);
begin
  if Assigned(FOnFixedCellClick) then
    FOnFixedCellClick(Self, ACol, ARow);
end;

procedure TRxDrawGrid.CheckFixedCellButton(ACol, ARow: Longint; var Enabled: Boolean);
begin
  if (ACol >= 0) and (ARow >= 0) and ((ACol < FixedCols) or (ARow < FixedRows)) then
  begin
    if Assigned(FOnCheckButton) then
      FOnCheckButton(Self, ACol, ARow, Enabled);
  end
  else
    Enabled := False;
end;

procedure TRxDrawGrid.TopLeftChanged;
begin
  if (goRowSelect in Options) and DefaultDrawing then
    InvalidateRow(Self.Row);
  inherited TopLeftChanged;
  if FTracking then
    StopTracking;
end;

procedure TRxDrawGrid.ColWidthsChanged;
begin
  inherited ColWidthsChanged;
  if FTracking then
    StopTracking;
  if Assigned(FOnColumnSized) then
    FOnColumnSized(Self);
end;

procedure TRxDrawGrid.RowHeightsChanged;
begin
  inherited RowHeightsChanged;
  if FTracking then
    StopTracking;
  if Assigned(FOnRowSized) then
    FOnRowSized(Self);
end;

procedure TRxDrawGrid.StopTracking;
begin
  if FTracking then
  begin
    TrackButton(-1, -1);
    FTracking := False;
    MouseCapture := False;
  end;
end;

procedure TRxDrawGrid.TrackButton(X, Y: Integer);
var
  Cell: TGridCoord;
  NewPressed: Boolean;
begin
  Cell := MouseCoord(X, Y);
  NewPressed := PtInRect(Rect(0, 0, ClientWidth, ClientHeight), Point(X, Y))
    and (FPressedCell.X = Cell.X) and (FPressedCell.Y = Cell.Y);
  if FPressed <> NewPressed then
  begin
    FPressed := NewPressed;
    InvalidateCell(Cell.X, Cell.Y);
    InvalidateCell(FPressedCell.X, FPressedCell.Y);
  end;
end;

function TRxDrawGrid.IsActiveControl: Boolean;
var
  H: Hwnd;
  ParentForm: TCustomForm;
begin
  Result := False;
  ParentForm := GetParentForm(Self);
  if Assigned(ParentForm) then
  begin
    if (ParentForm.ActiveControl = Self) then
      Result := True;
  end
  else
  begin
    H := GetFocus;
    while IsWindow(H) and (Result = False) do
      if H = WindowHandle then
        Result := True
      else
        H := GetParent(H);
  end;
end;

procedure TRxDrawGrid.MouseDown(Button: TMouseButton; Shift: TShiftState;
  X, Y: Integer);
var
  Cell: TGridCoord;
  EnableClick, Fixed: Boolean;
begin
  HideEditor;
  if not (csDesigning in ComponentState) and (CanFocus or
    (GetParentForm(Self) = nil)) then
  begin
    SetFocus;
    if not IsActiveControl then
    begin
      MouseCapture := False;
      Exit;
    end;
  end;
  if (Button = mbLeft) and (ssDouble in Shift) then
  begin
    if FFixedCellsButtons then
    begin
      Cell := MouseCoord(X, Y);
      if not ((Cell.X >= 0) and (Cell.X < FixedCols)) and not
        ((Cell.Y >= 0) and (Cell.Y < FixedRows)) then
      begin
        DblClick;
        Exit;
      end;
    end
    else
    begin
      DblClick;
      Exit;
    end;
  end;
  if Sizing(X, Y) then
    inherited MouseDown(Button, Shift, X, Y)
  else
  begin
    Cell := MouseCoord(X, Y);
    Fixed := ((Cell.X >= 0) and (Cell.X < FixedCols)) or
      ((Cell.Y >= 0) and (Cell.Y < FixedRows));
    if FFixedCellsButtons and Fixed and not (csDesigning in ComponentState) then
    begin
      if ([goRowMoving, goColMoving] * Options <> []) and
        (Button = mbRight) then
      begin
        Button := mbLeft;
        FSwapButtons := True;
        MouseCapture := True;
      end
      else if (Button = mbLeft) then
      begin
        EnableClick := True;
        CheckFixedCellButton(Cell.X, Cell.Y, EnableClick);
        if EnableClick then
        begin
          MouseCapture := True;
          FTracking := True;
          FPressedCell := Cell;
          TrackButton(X, Y);
        end
        else
          Beep;
        Exit;
      end;
    end;
    inherited MouseDown(Button, Shift, X, Y);
  end;
end;

procedure TRxDrawGrid.MouseMove(Shift: TShiftState; X, Y: Integer);
begin
  if FTracking then
    TrackButton(X, Y);
  inherited MouseMove(Shift, X, Y);
end;

procedure TRxDrawGrid.MouseUp(Button: TMouseButton; Shift: TShiftState;
  X, Y: Integer);
var
  Cell: TGridCoord;
  ACol, ARow: Longint;
  DoClick: Boolean;
begin
  if FTracking and (FPressedCell.Y >= 0) and (FPressedCell.X >= 0) then
  begin
    Cell := MouseCoord(X, Y);
    DoClick := PtInRect(Rect(0, 0, ClientWidth, ClientHeight), Point(X, Y))
      and (Cell.Y = FPressedCell.Y) and (Cell.X = FPressedCell.X);
    StopTracking;
    if DoClick then
    begin
      ACol := Cell.X;
      ARow := Cell.Y;
      if (ARow < RowCount) and (ACol < ColCount) then
        DoFixedCellClick(ACol, ARow);
    end;
  end
  else
  if FSwapButtons then
  begin
    FSwapButtons := False;
    MouseCapture := False;
    if Button = mbRight then
      Button := mbLeft;
  end;
  inherited MouseUp(Button, Shift, X, Y);
end;

procedure TRxDrawGrid.Paint;
var
  R: TRect;
begin
  FDefaultDrawing := inherited DefaultDrawing;
  inherited DefaultDrawing := False;
  try
    inherited Paint;
  finally
    inherited DefaultDrawing := FDefaultDrawing;
  end;
  if not (csDesigning in ComponentState) and DefaultDrawing and Focused and
    ([goRowSelect, goRangeSelect] * Options = [goRowSelect]) then
  begin
    with Canvas do
    begin
      Font.Color := Self.Font.Color;
      Brush.Color := Self.Color;
    end;
    if Row >= FixedRows then
    begin
      R := BoxRect(FixedCols, Row, ColCount - 1, Row);
      if not (goHorzLine in Options) then
        Inc(R.Bottom, GridLineWidth);
      DrawFocusRect(Canvas.Handle, R);
    end;
  end;
end;

procedure TRxDrawGrid.CallDrawCellEvent(ACol, ARow: Longint; ARect: TRect;
  AState: TGridDrawState);
begin
  inherited DrawCell(ACol, ARow, ARect, AState);
end;

procedure TRxDrawGrid.DoDrawCell(ACol, ARow: Longint; ARect: TRect;
  AState: TGridDrawState);
begin
  CallDrawCellEvent(ACol, ARow, ARect, AState);
end;

procedure TRxDrawGrid.DrawCell(ACol, ARow: Longint; ARect: TRect;
  AState: TGridDrawState);
var
  Down: Boolean;
  TempRect: TRect;
  FrameFlags1, FrameFlags2: DWORD;
const
  EdgeFlag: array[Boolean] of UINT = (BDR_RAISEDINNER, BDR_SUNKENINNER);
begin
  if FDefaultDrawing or (csDesigning in ComponentState) then
    with Canvas do begin
      Font := Self.Font;
      if ([goRowSelect, goVertLine] * Options = [goRowSelect]) and
        not (gdFixed in AState) then Inc(ARect.Right, GridLineWidth);
      if ([goRowSelect, goHorzLine] * Options = [goRowSelect]) and
        not (gdFixed in AState) then Inc(ARect.Bottom, GridLineWidth);
      if (gdSelected in AState) and (not (gdFocused in AState) or
        ([goDrawFocusSelected, goRowSelect] * Options <> [])) then
      begin
        Brush.Color := clHighlight;
        Font.Color := clHighlightText;
      end
      else
      begin
        if gdFixed in AState then
          Brush.Color := FixedColor
        else
          Brush.Color := Color;
      end;
      FillRect(ARect);
    end;
  Down := FFixedCellsButtons and (gdFixed in AState) and Ctl3D and
    not (csLoading in ComponentState) and FPressed and FDefaultDrawing and
    (FPressedCell.X = ACol) and (FPressedCell.Y = ARow);
  inherited DefaultDrawing := FDefaultDrawing;
  if Down then
  begin
    Inc(ARect.Left, GridLineWidth);
    Inc(ARect.Top, GridLineWidth);
  end;
  try
    DoDrawCell(ACol, ARow, ARect, AState);
  finally
    inherited DefaultDrawing := False;
    if Down then
    begin
      Dec(ARect.Left, GridLineWidth);
      Dec(ARect.Top, GridLineWidth);
    end;
  end;
  if FDefaultDrawing and (gdFixed in AState) and Ctl3D then
  begin
    FrameFlags1 := 0;
    FrameFlags2 := 0;
    if goFixedVertLine in Options then
    begin
      FrameFlags1 := BF_RIGHT;
      FrameFlags2 := BF_LEFT;
    end;
    if goFixedHorzLine in Options then
    begin
      FrameFlags1 := FrameFlags1 or BF_BOTTOM;
      FrameFlags2 := FrameFlags2 or BF_TOP;
    end;
    if (FrameFlags1 or FrameFlags2) <> 0 then
    begin
      TempRect := ARect;
      if ((FrameFlags1 and BF_RIGHT) = 0) and
        (goFixedVertLine in Options) then
        Inc(TempRect.Right, GridLineWidth)
      else
      if ((FrameFlags1 and BF_BOTTOM) = 0) and
        (goFixedVertLine in Options) then
        Inc(TempRect.Bottom, GridLineWidth);
      DrawEdge(Canvas.Handle, TempRect, EdgeFlag[Down], FrameFlags1);
      DrawEdge(Canvas.Handle, TempRect, EdgeFlag[Down], FrameFlags2);
    end;
  end;
  if FDefaultDrawing and not (csDesigning in ComponentState) and
    (gdFocused in AState) and
    ([goEditing, goAlwaysShowEditor] * Options <>
    [goEditing, goAlwaysShowEditor])
    and not (goRowSelect in Options) then
      DrawFocusRect(Canvas.Handle, ARect);
end;

procedure TRxDrawGrid.WMRButtonUp(var Message: TWMMouse);
begin
  if not (FGridState in [gsColMoving, gsRowMoving]) then
    inherited
  else
  if not (csNoStdEvents in ControlStyle) then
    with Message do MouseUp(mbRight, KeysToShiftState(Keys), XPos, YPos);
end;

procedure TRxDrawGrid.WMLButtonDblClk(var Message: TWMLButtonDblClk);
var
  Cell: TGridCoord;
begin
  if FFixedCellsButtons then
  begin
    with Message do
      Cell := MouseCoord(XPos, YPos);
    if ((Cell.X >= 0) and (Cell.X < FixedCols)) or
      ((Cell.Y >= 0) and (Cell.Y < FixedRows)) then
    begin
      SendCancelMode(Self);
      if csCaptureMouse in ControlStyle then MouseCapture := True;
      if not (csNoStdEvents in ControlStyle) then
        with Message do
          MouseDown(mbLeft, KeysToShiftState(Keys) - [ssDouble], XPos, YPos);
      Exit;
    end;
  end;
  inherited;
end;

procedure TRxDrawGrid.WMKillFocus(var Msg: TWMKillFocus);
begin
  inherited;
  if Assigned(FOnChangeFocus) then
    FOnChangeFocus(Self);
end;

procedure TRxDrawGrid.WMSetFocus(var Msg: TWMSetFocus);
begin
  inherited;
  if Assigned(FOnChangeFocus) then
    FOnChangeFocus(Self);
end;

procedure TRxDrawGrid.WMCancelMode(var Message: TMessage);
begin
  StopTracking;
  inherited;
end;

function TRxDrawGrid.CreateEditor: TInplaceEdit;
begin
  Result := TRxInplaceEdit.Create(Self);
  TEdit(Result).OnChange := EditChanged;
end;

function TRxDrawGrid.GetEditAlignment(ACol, ARow: Longint): TAlignment;
begin
  Result := taLeftJustify;
  if Assigned(FOnGetEditAlign) then
    FOnGetEditAlign(Self, ACol, ARow, Result);
end;

function TRxDrawGrid.GetEditStyle(ACol, ARow: Longint): TInplaceEditStyle;
begin
  Result := ieSimple;
  if Assigned(FOnGetEditStyle) then
    FOnGetEditStyle(Self, ACol, ARow, Result);
end;

procedure TRxDrawGrid.GetPicklist(ACol, ARow: Longint; PickList: TStrings);
begin
  if Assigned(FOnGetPicklist) then
    FOnGetPicklist(Self, ACol, ARow, PickList);
end;

procedure TRxDrawGrid.EditButtonClick;
begin
  if Assigned(FOnEditButtonClick) then
    FOnEditButtonClick(Self);
end;

end.
