LAB62

Unit Main;

Interface

Uses
    Winapi.Windows,
    Winapi.Messages,
    System.SysUtils,
    System.Variants,
    System.Classes,
    Vcl.Graphics,
    Clipbrd,
    Vcl.Controls,
    Vcl.Forms,
    Vcl.Dialogs,
    Vcl.StdCtrls,
    Vcl.Menus,
    Vcl.ExtCtrls,
    Vcl.Imaging.Pngimage;

Type
    TMainForm = Class(TForm)
        ResButton: TButton;
        CellNumber: TEdit;
        MainMenu1: TMainMenu;
        N1: TMenuItem;
        N2: TMenuItem;
        N3: TMenuItem;
        N4: TMenuItem;
        N5: TMenuItem;
        Y1: TLabel;
        Disk: TLabel;
        BalloonHint1: TBalloonHint;
        OpenDialog1: TOpenDialog;
        SaveDialog1: TSaveDialog;
        Output: TMemo;
        LabelTask: TLabel;
        Procedure ResButtonClick(Sender: TObject);
        Procedure N2Click(Sender: TObject);
        Procedure N5Click(Sender: TObject);
        Procedure CellNumberKeyPress(Sender: TObject; Var Key: Char);
        Procedure N3Click(Sender: TObject);
        Procedure GetPath(Var Path: String);
        Procedure N4Click(Sender: TObject);
        Procedure Checker(Var IsCorrect: Boolean);
        Procedure N1Click(Sender: TObject);
        Procedure CellNumberChange(Sender: TObject);
        Procedure FormMouseMove(Sender: TObject; Shift: TShiftState; X: Integer);
        Procedure FormCloseQuery(Sender: TObject; Var CanClose: Boolean);
        Procedure CellNumberContextPopup(Sender: TObject; MousePos: TPoint; Var Handled: Boolean);

    Private
        { Private declarations }
    Public
        { Public declarations }
    End;

Const
    NumSet = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', #8, #44, #45, #46];

Var
    MainForm: TMainForm;

Implementation

{$R *.dfm}

Uses
    Instruction,
    Information;

Procedure TmainForm.Checker(Var IsCorrect: Boolean);

Begin
    IsCorrect := True;

    Try
        StrtoFloat(CellNumber.Text);
    Except
        IsCorrect := False;
    End;

End;

Function CountWays(N: Integer): Integer;
Begin
    If N = 1 Then
        Result := 1
    Else
        If N = 2 Then
            Result := 2
        Else
            Result := CountWays(N - 1) + CountWays(N - 2);
End;

Procedure TMainForm.ResButtonClick(Sender: TObject);
Var
    NumDisks: Integer;
Begin
    Try
        NumDisks := StrToInt(CellNumber.Text);
    Except
        NumDisks := 0;
    End;

    Output.Lines.Clear;
    Output.Lines.Add('Количество способов продвижения на ' + IntToStr(NumDisks) + '-ю клетку: ' + IntToStr(CountWays(NumDisks)));
End;

Procedure TMainForm.FormCloseQuery(Sender: TObject; Var CanClose: Boolean);
Var
    Confirmation: Integer;
Begin
    Confirmation := Application.MessageBox('Вы действительно хотите выйти?', 'Выход', MB_YESNO);
    CanClose := Confirmation = IDYES;
End;

Procedure TMainForm.FormMouseMove(Sender: TObject; Shift: TShiftState; X: Integer);
Begin
    If (CellNumber.Text <> '') Then
        ResButton.Enabled := True
    Else
        ResButton.Enabled := False;
End;

Procedure TMainForm.CellNumberChange(Sender: TObject);
Var
    Value: Double;
Begin
    If TryStrToFloat(CellNumber.Text, Value) Then
    Begin
        If (Value < 1) Or (Value > 30) Then
        Begin
            BalloonHint1.Title := 'Неверное значение.';
            BalloonHint1.Description := 'N должно быть больше 0 и меньше 30.';
            BalloonHint1.ImageIndex := 1;
            BalloonHint1.ShowHint(CellNumber);
            CellNumber.Text := '';
        End;
    End;
    CellNumber.MaxLength := 2;
    If Length(CellNumber.Text) = 0 Then
    Begin
        Output.Lines.Clear;
    End;
End;

Procedure TMainForm.CellNumberContextPopup(Sender: TObject; MousePos: TPoint; Var Handled: Boolean);
Begin
    Handled := True;
End;

Procedure TMainForm.CellNumberKeyPress(Sender: TObject; Var Key: Char);
Begin

    If Key In NumSet Then
    Begin
        If Key = '0' Then
        Begin
            If Length(CellNumber.Text) = 1 Then
            Begin
                If CellNumber.Text[1] In ['0'] Then
                Begin
                    Key := #0;
                End;
            End;
            If Length(CellNumber.Text) = 2 Then
            Begin
                If (CellNumber.Text[1] = '-') AND (CellNumber.Text[2] = '0') Then
                Begin
                    Key := #0;
                End;
            End;
        End;

        If Key = #45 Then
        Begin
            If Length(CellNumber.Text) > 0 Then
            Begin
                BalloonHint1.Title := 'Недопустимый символ.';
                BalloonHint1.Description := 'Здесь можно ввести только число.';
                BalloonHint1.ImageIndex := 1;
                BalloonHint1.ShowHint(CellNumber);
                Key := #0;
            End;
        End;

        If Key In [',', '.'] Then
        Begin
            Key := FormatSettings.DecimalSeparator;
            If Pos(Key, CellNumber.Text) <> 0 Then
            Begin
                BalloonHint1.Title := 'Недопустимый символ.';
                BalloonHint1.Description := 'Здесь можно ввести только число.';
                BalloonHint1.ImageIndex := 1;
                BalloonHint1.ShowHint(CellNumber);
                Key := #0;
            End
            Else
                If Length(CellNumber.Text) > 0 Then
                Begin
                    If (CellNumber.Text[1] = '-') AND (Length(CellNumber.Text) = 1) Then
                    Begin
                        Key := #0;
                    End
                End
                Else
                    If CellNumber.SelStart = 0 Then
                    Begin
                        CellNumber.Text := '0' + CellNumber.Text;
                        CellNumber.SelStart := 1;
                    End;
        End;
    End
    Else
    Begin
        BalloonHint1.Title := 'Недопустимый символ.';
        BalloonHint1.Description := 'Здесь можно ввести только число.';
        BalloonHint1.ShowHint(CellNumber);
        Key := #0;
    End;
End;

Procedure TMainForm.N1Click(Sender: TObject);
Begin
    If Output.Lines.Count = 0 Then
    Begin
        N4.Enabled := False;
    End
    Else
    Begin
        N4.Enabled := True;
    End;
End;

Procedure TMainForm.N2Click(Sender: TObject);
Begin
    InstructionForm.ShowModal;
End;

Procedure TMainForm.GetPath(Var Path: String);
Begin
    If OpenDialog1.Execute Then
    Begin
        Path := OpenDialog1.FileName;
    End
    Else
    Begin
        ShowMessage('Открытие файла отменено!');
    End;
End;

Procedure TMainForm.N3Click(Sender: TObject);
Var
    IsCorrect, Fail: Boolean;
    Path, Number, Str: String;
    Count: Integer;
    FileElem: TextFile;
Begin
    GetPath(Path);

    AssignFile(FileElem, Path);
    Fail := False;
    IsCorrect := True;
    Count := 0;

    If Not FileExists(Path) Then
    Begin
        ShowMessage('Файл не найден!');
    End
    Else
    Begin
        Try
            Try
                Reset(FileElem);
            Except
                CloseFile(FileElem);
                IsCorrect := False;
                ShowMessage('Ошибка открытия файла.');
            End;

            If IsCorrect Then
            Begin
                While Not Eof(FileElem) Do
                Begin
                    ReadLn(FileElem, Str);
                    Inc(Count);
                End;

                CloseFile(FileElem);
                If Count <> 1 Then
                    Fail := True;
            End;

            If IsCorrect Then
            Begin
                Reset(FileElem);

                Try
                    Readln(FileElem, Number);
                    If Not TryStrToInt(Number, Count) Then
                        Fail := True;
                Except
                    Fail := True;
                End;
            End;
        Finally
            CloseFile(FileElem);
            If Fail Then
                ShowMessage('Проверьте введенные данные и повторите попытку!')
            Else
            Begin
                CellNumber.Text := Number;
            End;
            ShowMessage('Обработка завершена.');
        End;
    End;
End;

Procedure TMainForm.N4Click(Sender: TObject);
Begin

    If SaveDialog1.Execute Then
    Begin

        Output.Lines.SaveToFile(SaveDialog1.FileName);
    End
    Else

    Begin
        ShowMessage('Сохранение в файл отменено.');
    End;

End;

Procedure TMainForm.N5Click(Sender: TObject);
Begin
    InformationForm.ShowModal;
End;

End.