Subversion Repositories jumper

unit Main;

interface

uses

  Windows, SysUtils, Classes, Graphics, Dialogs, StdCtrls, Menus, Controls,

  ComCtrls, ExtCtrls, Forms, MMSystem, LevelFunctions, Registry;

type

  TField = record

    FieldType: TFieldType;

    Goal: Boolean;

    Panel: TPanel;

    Stone: TImage;

  end;

  TGoalStatus = (gsNoGoal, gsMultipleStonesRemaining, gsLastStoneInGoalRed, gsLastStoneInGoalYellow, gsLastStoneInGoalGreen, gsLastStoneOutsideGoal);

  TFieldState = (fsError, fsLocked, fsAvailable, fsStone);

  TPlayGroundMatrix = array of array of TField;

  TMainForm = class(TForm)

    Playground: TPanel;

    MainMenu: TMainMenu;

    Help1: TMenuItem;

    MExit: TMenuItem;

    Statistics: TStatusBar;

    Timer: TTimer;

    MNewGame: TMenuItem;

    Help2: TMenuItem;

    MAbout: TMenuItem;

    MHelp: TMenuItem;

    N5: TMenuItem;

    MJumpHistory: TMenuItem;

    N2: TMenuItem;

    N4: TMenuItem;

    MHighScores: TMenuItem;

    MRestartGame: TMenuItem;

    MSettings: TMenuItem;

    MEnableSound: TMenuItem;

    MPauseTime: TMenuItem;

    N1: TMenuItem;

    MUndo: TMenuItem;

    N3: TMenuItem;

    procedure MExitClick(Sender: TObject);

    procedure TimerTimer(Sender: TObject);

    procedure MNewGameClick(Sender: TObject);

    procedure MAboutClick(Sender: TObject);

    procedure FormShow(Sender: TObject);

    procedure FormCreate(Sender: TObject);

    procedure FormDestroy(Sender: TObject);

    procedure MJumpHistoryClick(Sender: TObject);

    procedure MRestartGameClick(Sender: TObject);

    procedure MHighScoresClick(Sender: TObject);

    procedure MPauseTimeClick(Sender: TObject);

    procedure FormClose(Sender: TObject; var Action: TCloseAction);

    procedure MHelpClick(Sender: TObject);

    procedure MEnableSoundClick(Sender: TObject);

    procedure MUndoClick(Sender: TObject);

  private

    CountedSeconds: Integer;

    LevelFile: String;

    LookupFieldCoordinateArray: array of TPoint;

    PrevPlaygroundMatrixes: array of TPlayGroundMatrix;

    PlaygroundMatrix: TPlayGroundMatrix;

    Points: Integer;

    LevelTotalStones: Integer;

    LevelRemovedStones: Integer;

    JumpHistory: TStringList;

    Level: TLevel;

    procedure LoadSettings;

    procedure SaveSettings;

    procedure RestartLevel;

    procedure SetNewPlayGroundMatrix(Matrix: TPlayGroundMatrix);

    procedure RedrawStonesFromMatrix(Matrix: TPlayGroundMatrix);

    function AskForLevel: String;

    function AreJumpsPossible: boolean;

    procedure StoneDraggingAllow(Stone: TImage; Allow: boolean);

    procedure NewGame(Filename: string);

    function LevelTime: String;

    procedure DestroyLevel;

    procedure RefreshTime;

    procedure RefreshPoints;

    procedure RefreshStonesRemoved;

    procedure CountPoints(t: TFieldType);

    procedure RemoveStone(x, y: integer; count_points: boolean);

    procedure DoJump(SourceTag, DestTag: integer);

    function CanJump(x, y: integer): boolean;

    function MayJump(SourceX, SourceY, DestX, DestY: integer): boolean; overload;

    function MayJump(SourceTag, DestTag: integer): boolean; overload;

    procedure StoneDragOver(Sender, Source: TObject; X,

      Y: Integer; State: TDragState; var Accept: Boolean);

    procedure StoneDragDrop(Sender, Source: TObject; X, Y: Integer);

    procedure DrawField(x, y: integer; t: TFieldProperties; halftabs: integer);

    function DrawStone(fieldtype: TFieldType; panel: TPanel): TImage;

    function DrawStoneBox(x, y, tag, halftabs: integer; isGoal: boolean): TPanel;

    procedure BuildPlayground(LevelArray: TLevelArray);

    function FieldState(t: TFieldType): TFieldState; overload;

    function FieldState(f: TField): TFieldState; overload;

    function FieldState(x, y: integer): TFieldState; overload;

    procedure ClearMatrix(Matrix: TPlayGroundMatrix; FreeVCL: boolean);

    function CloneMatrix(Source: TPlayGroundMatrix): TPlayGroundMatrix;

    function MatrixHasGoal(Matrix: TPlayGroundMatrix): boolean;

    procedure LoadPictureForType(FieldType: TFieldType; Picture: TPicture);

    function MatrixWorth(Matrix: TPlayGroundMatrix): integer;

    function GoalStatus: TGoalStatus;

    function GoalFieldType(Matrix: TPlayGroundMatrix): TFieldType;

  end;

var

  MainForm: TMainForm;

implementation

uses

  About, Finish, Choice, Functions, History, HighScore, Help, Constants;

{$R *.dfm}

function TMainForm.MatrixHasGoal(Matrix: TPlayGroundMatrix): boolean;

var

  i, j: integer;

begin

  result := false;

  for i := Low(Matrix) to High(Matrix) do

  begin

    for j := Low(Matrix[i]) to High(Matrix[i]) do

    begin

      result := result or Matrix[i][j].Goal;

    end;

  end;

end;

function TMainForm.GoalFieldType(Matrix: TPlayGroundMatrix): TFieldType;

var

  i, j: integer;

begin

  for i := Low(Matrix) to High(Matrix) do

  begin

    for j := Low(Matrix[i]) to High(Matrix[i]) do

    begin

      if Matrix[i][j].Goal then result := Matrix[i][j].FieldType

    end;

  end;

end;

function TMainForm.MatrixWorth(Matrix: TPlayGroundMatrix): integer;

var

  i, j: integer;

begin

  result := 0;

  for i := Low(Matrix) to High(Matrix) do

  begin

    for j := Low(Matrix[i]) to High(Matrix[i]) do

    begin

      Inc(result, FieldTypeWorth(Matrix[i][j].FieldType));

    end;

  end;

end;

procedure TMainForm.ClearMatrix(Matrix: TPlayGroundMatrix; FreeVCL: boolean);

var

  i, j: integer;

begin

  for i := Low(Matrix) to High(Matrix) do

  begin

    for j := Low(Matrix[i]) to High(Matrix[i]) do

    begin

      if FreeVCL then

      begin

        if Assigned(Matrix[i][j].Stone) then Matrix[i][j].Stone.Free;

        if Assigned(Matrix[i][j].Panel) then Matrix[i][j].Panel.Free;

      end;

    end;

    SetLength(Matrix[i], 0);

  end;

  SetLength(Matrix, 0);

end;

procedure TMainForm.RedrawStonesFromMatrix(Matrix: TPlayGroundMatrix);

var

  i, j: integer;

begin

  for i := Low(Matrix) to High(Matrix) do

  begin

    for j := Low(Matrix[i]) to High(Matrix[i]) do

    begin

      if Assigned(Matrix[i][j].Stone) then

      begin

        LoadPictureForType(Matrix[i][j].FieldType, Matrix[i][j].Stone.Picture);

        StoneDraggingAllow(Matrix[i][j].Stone, FieldState(Matrix[i][j].FieldType) <> fsAvailable);

      end;

    end;

  end;

end;

procedure TMainForm.DestroyLevel;

var

  i: Integer;

begin

  MPauseTime.Enabled := false;

  Timer.Enabled := false;

  MRestartGame.Enabled := false;

  LevelFile := '';

  CountedSeconds := 0;

  RefreshTime;

  Points := 0;

  RefreshPoints;

  LevelRemovedStones := 0;

  LevelTotalStones := 0;

  RefreshStonesRemoved;

  JumpHistory.Clear;

  ClearMatrix(PlayGroundMatrix, true);

  for i := 0 to Length(PrevPlaygroundMatrixes)-1 do

    ClearMatrix(PrevPlaygroundMatrixes[i], false);

  SetLength(PrevPlaygroundMatrixes, 0);

  MUndo.Enabled := false;

  SetLength(LookupFieldCoordinateArray, 0);

  if Assigned(Level) then FreeAndNil(Level);

end;

procedure TMainForm.LoadPictureForType(FieldType: TFieldType; Picture: TPicture);

begin

  case FieldType of

    ftEmpty:  Picture.Bitmap.LoadFromResourceName(HInstance, RES_EMPTY);

    ftGreen:  Picture.Bitmap.LoadFromResourceName(HInstance, RES_GREEN);

    ftYellow: Picture.Bitmap.LoadFromResourceName(HInstance, RES_YELLOW);

    ftRed:    Picture.Bitmap.LoadFromResourceName(HInstance, RES_RED);

  end;

end;

function TMainForm.DrawStone(fieldtype: TFieldType; panel: TPanel): TImage;

begin

  result := TImage.Create(panel);

  result.Parent := panel;

  LoadPictureForType(fieldtype, result.Picture);

  result.Width := panel.Width - 2*MET_SHAPE_MARGIN;

  result.Height := panel.Height - 2*MET_SHAPE_MARGIN;

  result.Left := MET_SHAPE_MARGIN;

  result.Top := MET_SHAPE_MARGIN;

  result.Center := true;

  result.Transparent := true;

  result.Tag := panel.Tag;

  result.OnDragOver := panel.OnDragOver;

  result.OnDragDrop := panel.OnDragDrop;

  StoneDraggingAllow(result, FieldState(fieldtype) <> fsAvailable);

end;

procedure TMainForm.StoneDraggingAllow(Stone: TImage; Allow: boolean);

begin

  if Allow then

  begin

    Stone.DragMode := dmAutomatic;

    (Stone.Parent as TPanel).DragMode := dmAutomatic;

  end

  else

  begin

    Stone.DragMode := dmManual;

    (Stone.Parent as TPanel).DragMode := dmManual;

  end;

end;

function TMainForm.DrawStoneBox(x, y, tag, halftabs: integer; isGoal: boolean): TPanel;

begin

  result := TPanel.Create(Playground);

  result.Parent := Playground;

  if isGoal then

  begin

    result.BevelInner := bvLowered;

  end;

  result.Color := Playground.Color;

  result.BevelOuter := bvLowered;

  result.Width := MET_FIELD_SIZE;

  result.Height := MET_FIELD_SIZE;

  result.Left := x * (MET_FIELD_SIZE+MET_FIELD_SPACE) + MET_FIELD_SPACE - (halftabs*MET_HALFTAB_SIZE);

  result.Top := y * (MET_FIELD_SIZE+MET_FIELD_SPACE) + MET_FIELD_SPACE;

  result.Tag := tag;

  result.OnDragOver := StoneDragOver;

  result.OnDragDrop := StoneDragDrop;

end;

procedure TMainForm.MExitClick(Sender: TObject);

begin

  Close;

end;

function TMainForm.FieldState(t: TFieldType): TFieldState;

begin

  result := fsError;

  case t of

    ftFullSpace:        result := fsLocked;

    ftHalfSpace: result := fsLocked;

    ftEmpty:         result := fsAvailable;

    ftGreen:         result := fsStone;

    ftYellow:        result := fsStone;

    ftRed:           result := fsStone;

  end;

end;

function TMainForm.FieldState(f: TField): TFieldState;

begin

  result := FieldState(f.FieldType);

end;

function TMainForm.FieldState(x, y: integer): TFieldState;

begin

  result := fsError;

  if (x < Low(PlayGroundMatrix)) or (x > High(PlayGroundMatrix)) then exit;

  if (y < Low(PlayGroundMatrix[x])) or (y > High(PlayGroundMatrix[x])) then exit;

  result := FieldState(PlayGroundMatrix[x][y]);

end;

procedure TMainForm.RefreshTime;

begin

  Statistics.Panels.Items[0].Text := Format(LNG_TIME, [LevelTime]);

end;

procedure TMainForm.RefreshStonesRemoved;

begin

  Statistics.Panels.Items[1].Text := Format(LNG_STONES_REMOVED, [LevelRemovedStones, LevelTotalStones]);

end;

procedure TMainForm.RefreshPoints;

begin

  Statistics.Panels.Items[2].Text := Format(LNG_POINTS, [Points]);

end;

procedure TMainForm.CountPoints(t: TFieldType);

begin

  inc(Points, FieldTypeWorth(t));

  RefreshPoints;

end;

procedure TMainForm.RemoveStone(x, y: integer; count_points: boolean);

begin

  if count_points then

  begin

    CountPoints(PlayGroundMatrix[x, y].FieldType);

    Inc(LevelRemovedStones);

    RefreshStonesRemoved;

  end;

  PlayGroundMatrix[x, y].FieldType := ftEmpty;

  LoadPictureForType(PlayGroundMatrix[x, y].FieldType, PlayGroundMatrix[x, y].Stone.Picture);

  StoneDraggingAllow(PlayGroundMatrix[x, y].Stone, false);

end;

function TMainForm.CanJump(x, y: integer): boolean;

begin

  if FieldState(x, y) <> fsStone then

  begin

    result := false;

    exit;

  end;

  result := true;

  if MayJump(x, y, x+2, y) then exit;

  if MayJump(x, y, x-2, y) then exit;

  if MayJump(x, y, x, y+2) then exit;

  if MayJump(x, y, x, y-2) then exit;

  if Level.GetGameMode = gmDiagonal then

  begin

    if MayJump(x, y, x-2, y-2) then exit;

    if MayJump(x, y, x+2, y-2) then exit;

    if MayJump(x, y, x-2, y+2) then exit;

    if MayJump(x, y, x+2, y+2) then exit;

  end;

  result := false;

end;

function TMainForm.AreJumpsPossible: boolean;

var

  i, j: integer;

begin

  result := false;

  for i := Low(PlayGroundMatrix) to High(PlayGroundMatrix) do

  begin

    for j := Low(PlayGroundMatrix[i]) to High(PlayGroundMatrix[i]) do

    begin

      if CanJump(i, j) then

      begin

        result := true;

        break;

      end;

      if result then break;

    end;

  end;

end;

procedure TMainForm.DoJump(SourceTag, DestTag: integer);

var

  d, s: TPoint;

  old_fieldtype: TFieldType;

  res: Integer;

begin

  if not MayJump(SourceTag, DestTag) then exit;

  d := LookupFieldCoordinateArray[DestTag];

  s := LookupFieldCoordinateArray[SourceTag];

  JumpHistory.Add(Format(LNG_JUMP_LOG, [SourceTag+1, s.x+1, s.y+1, DestTag+1, d.x+1, d.y+1]));

  {$REGION 'Stein entfernen und Punkte vergeben'}

  if Level.GetGameMode = gmDiagonal then

  begin

    if (s.X-2 = d.X) and (s.Y-2 = d.Y) and (FieldState(s.X-1, s.Y-1) = fsStone) then RemoveStone(s.X-1, s.Y-1, true);

    if (s.X-2 = d.X) and (s.Y+2 = d.Y) and (FieldState(s.X-1, s.Y+1) = fsStone) then RemoveStone(s.X-1, s.Y+1, true);

    if (s.X+2 = d.X) and (s.Y-2 = d.Y) and (FieldState(s.X+1, s.Y-1) = fsStone) then RemoveStone(s.X+1, s.Y-1, true);

    if (s.X+2 = d.X) and (s.Y+2 = d.Y) and (FieldState(s.X+1, s.Y+1) = fsStone) then RemoveStone(s.X+1, s.Y+1, true);

  end;

  if (s.X+2 = d.X) and (s.Y = d.Y) and (FieldState(s.X+1, s.Y  ) = fsStone) then RemoveStone(s.X+1, s.Y, true);

  if (s.X-2 = d.X) and (s.Y = d.Y) and (FieldState(s.X-1, s.Y  ) = fsStone) then RemoveStone(s.X-1, s.Y, true);

  if (s.X = d.X) and (s.Y+2 = d.Y) and (FieldState(s.X  , s.Y+1) = fsStone) then RemoveStone(s.X, s.Y+1, true);

  if (s.X = d.X) and (s.Y-2 = d.Y) and (FieldState(s.X  , s.Y-1) = fsStone) then RemoveStone(s.X, s.Y-1, true);

  {$ENDREGION}

  // Den Timer erst nach dem ersten Zug starten

  // oder nach einer Pause neustarten

  if not Timer.Enabled then

  begin

    MPauseTime.Enabled := true;

    Timer.Enabled := true;

  end;

  MRestartGame.Enabled := true;

  // Sound abspielen

  if MEnableSound.Checked then PlaySound(RES_JUMP, HInstance, SND_ASYNC or SND_NOWAIT or SND_RESOURCE);

  {$REGION 'Nun den Stein springen lassen'}

  old_fieldtype := PlayGroundMatrix[s.X, s.Y].FieldType; // Steinfarbe merken

  RemoveStone(s.X, s.Y, false); // Eigenen Stein entfernen. Keine Punkte zählen, da das unser eigener Stein ist, der springt

  PlayGroundMatrix[d.X, d.Y].FieldType := old_fieldtype; // Farbe wiederherstellen

  LoadPictureForType(PlayGroundMatrix[d.X, d.Y].FieldType, PlayGroundMatrix[d.X, d.Y].Stone.Picture); // Stein an neue Position malen

  StoneDraggingAllow(PlayGroundMatrix[d.X, d.Y].Stone, true); // Und die Drag-Eigenschaft erneuern

  {$ENDREGION}

  {$REGION 'Sind weitere Sprünge möglich oder ist das Spiel vorbei?'}

  if not AreJumpsPossible then

  begin

    MPauseTime.Enabled := false;

    Timer.Enabled := false;

    RefreshTime;

    if MEnableSound.Checked then

    begin

      if LevelRemovedStones = LevelTotalStones-1 then

      begin

        if GoalStatus in [gsLastStoneInGoalRed, gsLastStoneInGoalYellow, gsLastStoneInGoalGreen] then

          PlaySound(RES_WIN2, HInstance, SND_ASYNC or SND_NOWAIT or SND_RESOURCE)

        else

          PlaySound(RES_WIN1, HInstance, SND_ASYNC or SND_NOWAIT or SND_RESOURCE)

      end

      else

        PlaySound(RES_LOSE, HInstance, SND_ASYNC or SND_NOWAIT or SND_RESOURCE);

    end;

    res := FinishForm.Execute(ExtractFileNameWithoutExt(LevelFile), Points, LevelTotalStones, LevelRemovedStones, CountedSeconds, GoalStatus, JumpHistory);

    if (res = mrOK) and FinishForm.ReplayCheckbox.Checked then RestartLevel;

  end;

  {$ENDREGION}

  SetLength(PrevPlaygroundMatrixes, Length(PrevPlaygroundMatrixes)+1);

  PrevPlaygroundMatrixes[Length(PrevPlaygroundMatrixes)-1] := CloneMatrix(PlaygroundMatrix);

  MUndo.Enabled := true;

end;

function TMainForm.MayJump(SourceX, SourceY, DestX, DestY: integer): boolean;

begin

  result := false;

  // Check 1: Ist das Zielfeld überhaupt leer?

  if FieldState(DestX, DestY) <> fsAvailable then exit;

  // Check 2: Befindet sich ein Stein zwischen Source und Destination und ist der Abstand 2?

  if Level.GetGameMode = gmDiagonal then

  begin

    if (SourceX-2 = DestX) and (SourceY-2 = DestY) and (FieldState(SourceX-1, SourceY-1) = fsStone) then result := true;

    if (SourceX-2 = DestX) and (SourceY+2 = DestY) and (FieldState(SourceX-1, SourceY+1) = fsStone) then result := true;

    if (SourceX+2 = DestX) and (SourceY-2 = DestY) and (FieldState(SourceX+1, SourceY-1) = fsStone) then result := true;

    if (SourceX+2 = DestX) and (SourceY+2 = DestY) and (FieldState(SourceX+1, SourceY+1) = fsStone) then result := true;

  end;

  if (SourceX+2 = DestX) and (SourceY   = DestY) and (FieldState(SourceX+1, SourceY  ) = fsStone) then result := true;

  if (SourceX-2 = DestX) and (SourceY   = DestY) and (FieldState(SourceX-1, SourceY  ) = fsStone) then result := true;

  if (SourceX   = DestX) and (SourceY+2 = DestY) and (FieldState(SourceX  , SourceY+1) = fsStone) then result := true;

  if (SourceX   = DestX) and (SourceY-2 = DestY) and (FieldState(SourceX  , SourceY-1) = fsStone) then result := true;

end;

function TMainForm.MayJump(SourceTag, DestTag: integer): boolean;

var

  s, d: TPoint;

begin

  d := LookupFieldCoordinateArray[DestTag];

  s := LookupFieldCoordinateArray[SourceTag];

  result := MayJump(s.X, s.Y, d.X, d.Y);

end;

procedure TMainForm.StoneDragDrop(Sender, Source: TObject; X, Y: Integer);

begin

  DoJump(TComponent(Source).Tag, TComponent(Sender).Tag);

end;

procedure TMainForm.StoneDragOver(Sender, Source: TObject; X,

  Y: Integer; State: TDragState; var Accept: Boolean);

begin

  Accept := MayJump(TComponent(Source).Tag, TComponent(Sender).Tag);

end;

procedure TMainForm.DrawField(x, y: integer; t: TFieldProperties; halftabs: integer);

var

  newField: TField;

  index: integer;

begin

  if (t.Typ = ftFullSpace) or (t.Typ = ftHalfSpace) then exit;

  index := Length(LookupFieldCoordinateArray);

  newField.FieldType := t.Typ;

  newField.Goal := t.Goal;

  newField.Panel := DrawStoneBox(x, y, index, halftabs, t.Goal);

  newField.Stone := DrawStone(t.Typ, newField.Panel);

  if FieldState(t.Typ) = fsStone then Inc(LevelTotalStones);

  SetLength(LookupFieldCoordinateArray, index + 1);

  LookupFieldCoordinateArray[index].X := x;

  LookupFieldCoordinateArray[index].Y := y;

  if Length(PlayGroundMatrix) < x+1 then SetLength(PlayGroundMatrix, x+1);

  if Length(PlayGroundMatrix[x]) < y+1 then SetLength(PlayGroundMatrix[x], y+1);

  PlaygroundMatrix[x, y] := newField;

end;

function TMainForm.CloneMatrix(Source: TPlayGroundMatrix): TPlayGroundMatrix;

var

  i, j: integer;

begin

  SetLength(result, Length(Source));

  for i := Low(Source) to High(Source) do

  begin

    SetLength(result[i], Length(Source[i]));

    for j := Low(Source[i]) to High(Source[i]) do

    begin

      result[i][j].FieldType := Source[i][j].FieldType;

      result[i][j].Goal      := Source[i][j].Goal;

      result[i][j].Panel     := Source[i][j].Panel;

      result[i][j].Stone     := Source[i][j].Stone;

    end;

  end;

end;

procedure TMainForm.BuildPlayground(LevelArray: TLevelArray);

var

  i, j, halftabs, cur_x: integer;

  max_x, max_y, old_cw, old_ch: integer;

begin

  PlayGround.Visible := false;

  // Die Dimensionen ermitteln

  max_x := 0;

  for i := Low(LevelArray) to High(LevelArray) do

  begin

    halftabs := 0;

    for j := Low(LevelArray[i]) to High(LevelArray[i]) do

    begin

      if LevelArray[i][j].Typ = ftHalfSpace then inc(halftabs);

      DrawField(j, i, LevelArray[i][j], halftabs);

    end;

    cur_x := High(LevelArray[i]) + 1;

    if cur_x > max_x then max_x := cur_x;

  end;

  max_y := High(LevelArray) + 1;

  PlayGround.Visible := true;

  // Die aktuellen Dimensionen merken

  old_cw := ClientWidth;

  old_ch := ClientHeight;

  // Das Form an das Level anpassen

  PlayGround.Width := MET_FIELD_SPACE + max_x * (MET_FIELD_SPACE + MET_FIELD_SIZE);

  PlayGround.Height := MET_FIELD_SPACE + max_y * (MET_FIELD_SPACE + MET_FIELD_SIZE);

  ClientWidth := 2 * MET_OUTER_MARGIN + PlayGround.Width;

  ClientHeight := 2 * MET_OUTER_MARGIN + PlayGround.Height + Statistics.Height;

  Statistics.Panels.Items[0].Width := Round(ClientWidth*MET_PERCENT_PNL_TIME);

  Statistics.Panels.Items[1].Width := Round(ClientWidth*MET_PERCENT_PNL_STONES);

  // Wenn sich das Form vergrößert oder verkleinert hat, neu justieren

  if (old_cw <> ClientWidth) or (old_ch <> ClientHeight) then

  begin

    Left := Screen.Width div 2 - Width div 2;

    Top := Screen.Height div 2 - Height div 2;

    // Playground mittig setzen, falls die Mindestgröße für die

    // Punkteanzeige unterschritten wurde,

    PlayGround.Left := ClientWidth div 2 - PlayGround.Width div 2;

    PlayGround.Top := ClientHeight div 2 - PlayGround.Height div 2;

  end;

  SetLength(PrevPlaygroundMatrixes,1);

  PrevPlaygroundMatrixes[0] := CloneMatrix(PlayGroundMatrix);

  MUndo.Enabled := false;

end;

procedure TMainForm.TimerTimer(Sender: TObject);

begin

  if mainform.Focused then Inc(CountedSeconds);

  RefreshTime;

end;