Тема: «Разработка GUI. Создание SDI-приложений обработка событий»

Новосибирский государственный технический университет

Кафедра вычислительной техники

Лабораторная работа 3

по дисциплине «Технология программирования и разработка

программного обеспечения»

Тема: «РАЗРАБОТКА GUI. СОЗДАНИЕ SDI-ПРИЛОЖЕНИЙ

ОБРАБОТКА СОБЫТИЙ»

Группа: АВТ-910

Студент:

Преподаватель:

Новосибирск 2011

Примеры кода

Пример 2. Два обработчика событий для MouseClick

namespace lab3 {

public partial class Form1 : Form {

float x, y;

// координаты

Brush pStdBrush;

// Кисть

Graphics poGraphics;

public Form1() {

x = 10; y = 20;

pStdBrush = new SolidBrush(Color. Black);

poGraphics = this. CreateGraphics();

this. Text = "Программа 1";

this. Show();

// добавление обработчиков событий нажатия кнопки мыши

this. MouseClick += new MouseEventHandler(this. Form1_MouseClick);

this. MouseClick += new MouseEventHandler(this. ShowClick);

// вывод строки в позиции x, y

poGraphics. DrawString("Hello, Window Forms", this. Font, pStdBrush, x, y);

}

private void Form1_MouseClick(object sender, MouseEventArgs e) {

x = (float)e. X; y = (float)e. Y; // получение координат мыши

// вывод строки в позиции x, y

poGraphics. DrawString("Hello, Window Forms", this. Font, pStdBrush, x, y);

}

void ShowClick(object pSender, MouseEventArgs e) {

MessageBox. Show("Mouse clicked!!'");

}

}

static class Program {

/// <summary>

/// The main entry point for the application.

/// </summary>

[STAThread]

static void Main() {

Application. EnableVisualStyles();

Application. SetCompatibleTextRenderingDefault(false);

*****n(new Form1());

}

}

}

Пример 3. Обработка событий от правой и левой кнопки мыши

namespace lab3 {

public partial class Form1 : Form {

float x, y;

// координаты

Brush pStdBrush;

// Кисть

Graphics poGraphics;

public Form1() {

x = 10; y = 20;

pStdBrush = new SolidBrush(Color. Black);

poGraphics = this. CreateGraphics();

this. Text = "Программа 1";

this. Show();

// добавление обработчиков событий нажатия кнопки мыши

this. MouseClick += new MouseEventHandler(this. Form1_MouseClick);

this. MouseClick += new MouseEventHandler(this. ShowClick);

// вывод строки в позиции x, y

poGraphics. DrawString("Hello, Window Forms", this. Font, pStdBrush, x, y);

}

private void Form1_MouseClick(object sender, MouseEventArgs e) {

// если левая кнопка

if (e. Button == System. Windows. Forms. MouseButtons. Left) {

x = (float)e. X; y = (float)e. Y;

poGraphics. DrawString("Hello, Window Forms", this. Font, pStdBrush, x, y);

}

}

void ShowClick(object pSender, MouseEventArgs e) {

// если правая кнопка

if (e. Button == System. Windows. Forms. MouseButtons. Right)

MessageBox. Show("Mouse clicked!!'");

}

}

static class Program {

/// <summary>

/// The main entry point for the application.

/// </summary>

[STAThread]

static void Main() {

Application. EnableVisualStyles();

Application. SetCompatibleTextRenderingDefault(false);

*****n(new Form1());

}

}

}

Пример 4. Компоненты

using System;

using System. Collections. Generic;

using ponentModel;

using System. Data;

using System. Drawing;

using System. Linq;

using System. Text;

using System. Windows. Forms;

namespace lab3 {

public partial class SocOpros : Form {

public SocOpros() {

InitializeComponent();

}

private void Btnyes_Click(object sender, EventArgs e) {

MessageBox. Show("Мы и не сомневались, что Вы так думаете!");

}

//В обработчике связываем движение мыши с координатами кнопки

//и устанавливаем координаты, куда она будет возвращаться, если во

//время своего движения выйдет за указанную область

private void Btnno_MouseMove(object sender, MouseEventArgs e) {

Btnno. Top -= e. Y; Btnno. Left += e. X;

if (Btnno. Top < -10 || Btnno. Top > 100) Btnno. Top = 60;

if (Btnno. Left < -80 || Btnno. Left > 250) Btnno. Left = 120;

}

private void MenuExit_Click(object sender, EventArgs e) {

Close(); //закрытие формы

}

private void SocOpros_FormClosing(object sender, FormClosingEventArgs e) {

//вывод диалога вопроса с кнопками Yes No

if (MessageBox. Show("Do you want to close", "SocOpros",

MessageBoxButtons. YesNo, MessageBoxIcon. Question)

== System. Windows. Forms. DialogResult. Yes)

//если выбрано Yes выйти из приложения

Application. Exit();

}

}

}

Пример 5. Диалоговые окна

namespace lab3 {

class Hotel {

public Hotel(String city, String name, int r, double m) {

City = city; HotelName = name;

Rooms = r; Rate = m;

}

public String City, HotelName;

public int Rooms;

public double Rate;

}

}

namespace lab3 {

public partial class AddHotelDialog : Form {

public AddHotelDialog() {

InitializeComponent();

}

public String City {

get { return txtCity. Text; }

set { txtCity. Text = value; }

}

public String HotelName {

get { return (txtHotelName. Text); }

set { txtHotelName. Text = value; }

}

public int Rooms {

get { return Convert. ToInt32(txtNumberRooms. Text); }

set { txtNumberRooms. Text = value. ToString(); }

}

public double Rate {

get { return Convert. ToDouble(txtRate. Text); }

set { txtRate. Text = value. ToString(); }

}

private void cmdOk_Click(object sender, EventArgs e) {

Close();

}

}

}

namespace lab3 {

public partial class AdminForm : Form {

public AdminForm() {

InitializeComponent();

}

ArrayList list = new ArrayList();

private void button1_Click(object sender, EventArgs e) {

AddHotelDialog dlg = new AddHotelDialog();

dlg. ShowDialog();

if (dlg. HotelName!= "") {

label1.Text = dlg. City;

label2.Text = dlg. HotelName;

label3.Text = dlg. Rooms. ToString();

label4.Text = dlg. Rate. ToString();

String s = dlg. City + ","

+ dlg. HotelName + ","

+ dlg. Rooms. ToString() + ","

+ dlg. Rate. ToString();

hotellist. Items. Add(s);

Hotel ob = new Hotel(dlg. City, dlg. HotelName, dlg. Rooms, dlg. Rate);

list. Add(ob);

} else {

MessageBox. Show("Введите данные", "Hotel Broker Administration",

MessageBoxButtons. OK, MessageBoxIcon. Exclamation);

return;

}

}

private void button2_Click(object sender, EventArgs e) {

if (MessageBox. Show("Do you want to close", "Warning",

MessageBoxButtons. YesNo, MessageBoxIcon. Question)

== System. Windows. Forms. DialogResult. Yes) {

Application. Exit();

}

}

private void AdminForm_Load(object sender, EventArgs e) {

Hotel ob1 = new Hotel("Москва", "Россия", 200, 1500);

list. Add(ob1);

Hotel ob2 = new Hotel("Москва", "Прага", 200, 3000);

list. Add(ob2);

Hotel ob3 = new Hotel("Новосибирск", "Объ", 150, 1500);

list. Add(ob3);

Hotel ob4 = new Hotel("Новосибирск", "Тратата", 300, 1200);

list. Add(ob4);

hotellist. Items. Clear();

if (list == null) { return; }

foreach (Hotel hotel in list) {

// строка для записи в элемент ListBox hotellist

String city = hotel. City. Trim();

String name = hotel. HotelName. Trim();

String rooms = hotel. Rooms. ToString();

String rate = hotel. Rate. ToString();

String str = city + "," + name + "," + rooms + "," + rate;

hotellist. Items. Add(str);

}

}

private void hotellist_SelectedIndexChanged(object sender, EventArgs e) {

if (hotellist. SelectedIndex!= -1) {

String selected = hotellist. SelectedItem. ToString();

String[] fields;

fields = selected. Split(','); // поля разбить;

label1.Text = fields[0];

label2.Text = fields[1];

label3.Text = fields[2];

label4.Text = fields[3];

} else { label1.Text = ""; }

}

}

}

1.Задание

1. Создать учебные примеры (программы 2–5) и разобрать принцип

их работы. Поместите в отчет примеры работы программ, их код с

комментариями.

2. Создать SDI-приложение (Single Document Interface, одно-

документный интерфейс) с элементами ввода и отображения полей

класса из задания к лабораторной работе 2. Для этого используйте раз-

личные элементы управления: текстовые поля, списки, независимые и

радиокнопки, а также панели и менеджеры компоновки.

3. Ввод новых данных осуществлять через дополнительную диало-

говую форму.

4. При изменении данных запрашивать подтверждение через окно

диалога. В случае неполных данных сообщать об ошибке.

5. Объекты сохранять в коллекции.

6. Реализовать просмотр всей коллекции объектов через список.

Для редактирования выбранного объекта создать дополнительную

форму модального диалога.

7. Добавить на форму меню, позволяющее работать с пунктами:

добавить, просмотреть, удалить, редактировать, справка.

8. Дублировать основные операции панелью инструментов.

2.Результат работы

Main форма

Выбор типа объекта

Заполнение журнала. Исключение на пустое название

Заполнение журнала. Исключение на пустого автора

Добавлен новый объект в список Main формы

Форма просмотра журнала

3.Исходный текст программы:

MainForm

using System;

using System. Collections. Generic;

using ponentModel;

using System. Data;

using System. Drawing;

using System. Linq;

using System. Text;

using System. Windows. Forms;

using print;

namespace printing

{

public partial class MainForm : Form

{

private List<Printing> printings = new List<Printing>();

public MainForm()

{

InitializeComponent();

listViewPrintings. Columns. Add("Title", 0, HorizontalAlignment. Center);

listViewPrintings. Columns. Add("Writer", 0, HorizontalAlignment. Center);

Test();

}

public void Test()

{

Printing objetcs0 = new Journal("fgf", "23rtfgf", 120, 256, 100);

objetcs0.addContentItem("1. Ololo", 3);

objetcs0.addContentItem("2. Rofl", 33);

objetcs0.addContentItem("3. Facepalm", 67);

Printing objetcs1 = new Book("C# 4.0", "Herbert Schildt", 430, 2011, 1056);

objetcs1.addContentItem("1. Ololo", 3);

Printing objetcs2 = new Journal("За рулём!", "2011", 150, 314, 124);

objetcs2.addContentItem("1. Nissan GT-R", 15);

objetcs2.addContentItem("2. Новый Gofl", 29);

objetcs2.addContentItem("3. Гонки по бездорожью...", 77);

printings. AddRange(new[] { objetcs0, objetcs1, objetcs2 });

printings. ForEach(AddMenuItem);

}

/// <summary>

/// Добаление объекта в список

/// </summary>

/// <param name="printing"></param>

private void AddMenuItem(Printing printing)

{

var item = new ListViewItem(printing. Title);

item. SubItems. Add(printing. Writer);

listViewPrintings. Items. Add(item);

}

/// <summary>

/// выход

/// </summary>

/// <param name="sender"></param>

/// <param name="e"></param>

private void close_Click(object sender, EventArgs e)

{

Application. Exit();

}

/// <summary>

/// Добавление объекта

/// </summary>

/// <param name="sender"></param>

/// <param name="e"></param>

private void addToolStripMenuItem_Click(object sender, EventArgs e)

{

Type select = new Type();

DialogResult res = select. ShowDialog();

if (res == DialogResult. OK)

{

int printType = select. GetType();

Printing printing = ShowInsertDialog(printType);

if (printing!= null)

{

printings. Add(printing);

AddMenuItem(printing);

RefreshListView();

}

}

}

/// <summary>

/// Выбор типа объекта при добавлении

/// </summary>

/// <param name="printType"></param>

/// <returns></returns>

private Printing ShowInsertDialog(int printType)

{

PrintingDialog printDialog;

if (printType == 1)

{

printDialog = new BookDialog();

}

else if (printType == 2)

{

printDialog = new JournalDialog();

}

else

{

MessageBox. Show("ERROR", "Error", MessageBoxButtons. OK, MessageBoxIcon. Error);

return null;

}

return printDialog. ShowDialog(this) == DialogResult. Cancel? null : printDialog. Printing;

}

/// <summary>

/// Изменение объекта

/// </summary>

/// <param name="sender"></param>

/// <param name="e"></param>

private void editToolStripMenuItem1_Click(object sender, EventArgs e)

{

if (listViewPrintings. SelectedIndices. Count == 0)

{

MessageBox. Show("Select object");

return;

}

int selected = listViewPrintings. SelectedIndices[0];

Printing selectedPrint = printings[selected];

ShowEditDialog(selectedPrint);

RefreshListView();

}

/// <summary>

/// Обновление списка

/// </summary>

private void RefreshListView()

{

listViewPrintings. Items. Clear();

printings. ForEach(AddMenuItem);

}

/// <summary>

/// Выбор формы заполнения

/// </summary>

/// <param name="selectedPrint"></param>

private void ShowEditDialog(Printing selectedPrint)

{

PrintingDialog printDialog;

if (selectedPrint is Book)

{

printDialog = new BookDialog(selectedPrint);

}

else if (selectedPrint is Journal)

{

printDialog = new JournalDialog(selectedPrint);

}

else

{

MessageBox. Show("Unknown type", "Error", MessageBoxButtons. OK, MessageBoxIcon. Error);

return;

}

printDialog. ShowDialog(this);

}

/// <summary>

///

/// </summary>

/// <param name="sender"></param>

/// <param name="e"></param>

private void ViewObj_Click(object sender, MouseEventArgs e)

{

int selected = listViewPrintings. SelectedIndices[0];

Printing selectedPrint = printings[selected];

ShowViewForm(selectedPrint);

}

/// <summary>

/// Выбор формы показа

/// </summary>

/// <param name="selectedPrint"></param>

private void ShowViewForm(Printing selectedPrint)

{

PrintingView printView;

if (selectedPrint is Book)

{

printView = new BookVeiw(selectedPrint);

}

else if (selectedPrint is Journal)

{

printView = new JournalVeiw(selectedPrint);

}

else

{

MessageBox. Show("Unknown type", "Error", MessageBoxButtons. OK, MessageBoxIcon. Error);

return;

}

printView. ShowDialog(this);

}

/// <summary>

/// Удаление объекта

/// </summary>

/// <param name="sender"></param>

/// <param name="e"></param>

private void deleteToolStripMenuItem_Click(object sender, EventArgs e)

{

if (listViewPrintings. SelectedIndices. Count == 0)

{

MessageBox. Show("Select object");

return;

}

int selected = listViewPrintings. SelectedIndices[0];

var confirmResult = MessageBox. Show("Do you want to delete this object?", "Confirmation dialog",

MessageBoxButtons. YesNo, MessageBoxIcon. Question);

if (confirmResult == DialogResult. Yes)

{

printings. RemoveAt(selected);

listViewPrintings. Items. RemoveAt(selected);

}

}

private void TileClick(object sender, EventArgs e)

{

listViewPrintings. View = View. Tile;

}

private void ListClick(object sender, EventArgs e)

{

listViewPrintings. View = View. List;

}

private void MainForm_Load(object sender, EventArgs e)

{

}

}

}

Type

using System;

using System. Collections. Generic;

using ponentModel;

using System. Data;

using System. Drawing;

using System. Linq;

using System. Text;

using System. Windows. Forms;

namespace printing

{

public partial class Type : Form

{

private RadioButton _selected;

public Type()

{

InitializeComponent();

}

private void Book_CheckedChanged(object sender, EventArgs e)

{

_selected = sender as RadioButton;

}

private void Journal_CheckedChanged(object sender, EventArgs e)

{

_selected = sender as RadioButton;

}

public int GetType()

{

//ShowDialog(parent);

if (_selected == book)

return 1;

if (_selected == journal)

return 2;

return 0;

}

private void Ok_Click(object sender, EventArgs e)

{

//Close();

}

private void Cancel_Click(object sender, EventArgs e)

{

//Close();

}

private void Type_Load(object sender, EventArgs e)

{

}

}

}

PrintingDialog

using System;

using System. Collections. Generic;

using ponentModel;

using System. Data;

using System. Drawing;

using System. Linq;

using System. Text;

using System. Windows. Forms;

using print;

namespace printing

{

public partial class PrintingDialog : Form

{

public PrintingDialog()

{

InitializeComponent();

}

public Printing Printing { get; set;}

/// <summary>

/// Конструктор для редактирования объекта

/// </summary>

/// <param name="Print"></param>

public PrintingDialog (Printing printing)

{

InitializeComponent();

Printing = printing;

FromContent();

}

public void FromContent()

{

Title. Text = Printing. Title;

Writer. Text = Printing. Writer;

Cost. Value = (decimal)Printing. Cost;

for (int i = 0; i < Printing. GetContentsLenght(); i++)

{

Contents. Items. Add(Printing. Contents[i]);

}

}

private void buttonAdd_Click(object sender, EventArgs e)

{

int listSize = Contents. Items. Count;

string content = Description. Text + "......" + Page. Value. ToString();

Contents. Items. Add(content);

Description. Clear();

}

private void buttonDelete_Click(object sender, EventArgs e)

{

Contents. Items. RemoveAt(Contents. SelectedIndex);

}

private void buttonCancel_Click(object sender, EventArgs e)

{

Close();

}

protected bool FillPrintingCommon()

{

try

{

Printing. Title = Title. Text;

Printing. Writer = Writer. Text;

Printing. Cost = (float)Cost. Value;

Printing. Contents = new List<string>();

for (int i = 0; i < Contents. Items. Count; i++)

{

Printing. addContentItemFromString(Contents. Items[i].ToString());

}

return true;

}

catch (MyException e)

{

MessageBox. Show(e. Message, "Error", MessageBoxButtons. OK, MessageBoxIcon. Error);

}

catch (Exception e)

{

MessageBox. Show(e. Message, "Error", MessageBoxButtons. OK, MessageBoxIcon. Error);

}

return false;

}

private void PrintingDialog_Load(object sender, EventArgs e)

{

}

protected virtual void buttonOk_Click(object sender, EventArgs e)

{

}

}

}

BookDialog

using System;

using System. Collections. Generic;

using ponentModel;

using System. Data;

using System. Drawing;

using System. Text;

using System. Windows. Forms;

using print;

namespace printing

{

public partial class BookDialog : printing. PrintingDialog

{

public BookDialog()

{

InitializeComponent();

Printing = new Book();

}

public BookDialog(Printing printing)

: base(printing)

{

InitializeComponent();

FromContentBook();

}

private void FromContentBook()

{

var printing = (Book)Printing;

NumberOfPages. Value = printing. Pages;

Year. Value = printing. Year;

}

protected override void buttonOk_Click(object sender, EventArgs e)

{

bool isFilled = FillPrintingCommon();

if (isFilled)

{

try

{

var printing = (Book)Printing;

printing. Pages = (int)NumberOfPages. Value;

printing. Year = (int)Year. Value;

}

catch (MyException exc)

{

MessageBox. Show(exc. Message, "Error", MessageBoxButtons. OK, MessageBoxIcon. Error);

return;

}

catch (Exception exc)

{

MessageBox. Show(exc. Message, "Error", MessageBoxButtons. OK, MessageBoxIcon. Error);

return;

}

DialogResult = DialogResult. OK;

Close();

}

}

private void BookDialog_Load(object sender, EventArgs e)

{

}

private void Year_ValueChanged(object sender, EventArgs e)

{

}

}

}

JournalDialog

using System;

using System. Collections. Generic;

using ponentModel;

using System. Data;

using System. Drawing;

using System. Text;

using System. Windows. Forms;

using print;

namespace printing

{

public partial class JournalDialog : printing. PrintingDialog

{

public JournalDialog()

{

InitializeComponent();

Printing = new Journal();

}

public JournalDialog(Printing printing):base(printing)

{

InitializeComponent();

FromContentJournal();

}

private void FromContentJournal()

{

var printing = (Journal)Printing;

NumberOfPages. Value = printing. Pages;

Number. Value = printing. Number;

}

protected override void buttonOk_Click(object sender, EventArgs e)

{

bool isFilled = FillPrintingCommon();

if (isFilled)

{

try

{

var printing = (Journal)Printing;

printing. Pages = (int)NumberOfPages. Value;

printing. Number = (int)Number. Value;

}

catch (MyException exc)

{

MessageBox. Show(exc. Message, "Error", MessageBoxButtons. OK, MessageBoxIcon. Error);

return;

}

catch (Exception exc)

{

MessageBox. Show(exc. Message, "Error", MessageBoxButtons. OK, MessageBoxIcon. Error);

return;

}

DialogResult = DialogResult. OK;

Close();

}

}

private void JournalDialog_Load(object sender, EventArgs e)

{

}

}

}

PrintingView

using System;

using System. Collections. Generic;

using ponentModel;

using System. Data;

using System. Drawing;

using System. Linq;

using System. Text;

using System. Windows. Forms;

using print;

namespace printing

{

public partial class PrintingView : Form

{

public Printing Print { get; set; }

public PrintingView()

{

InitializeComponent();

}

public PrintingView(Printing printing)

{

InitializeComponent();

Print = printing;

FromContent();

}

public void FromContent()

{

Title. Text = Print. Title;

Writer. Text = Print. Writer;

Cost. Text = Print. Cost. ToString();

int n = Print. GetContentsLenght();

for (int i = 0; i < n; i++)

{

Contents. Items. Add(Print. Contents[i]);

}

}

private void buttonClose_Click(object sender, EventArgs e)

{

Close();

}

private void PrintingView_Load(object sender, EventArgs e)

{

}

}

}

BookView

using System;

using System. Collections. Generic;

using ponentModel;

using System. Data;

using System. Drawing;

using System. Text;

using System. Windows. Forms;

using print;

namespace printing

{

public partial class BookVeiw : printing. PrintingView

{

public BookVeiw()

{

InitializeComponent();

}

public BookVeiw(Printing printing)

: base(printing)

{

InitializeComponent();

FromContentBook();

}

private void FromContentBook()

{

var printing = (Book)Print;

NumberOfPages. Text = printing. Pages. ToString();

Year. Text = printing. Year. ToString();

}

private void BookVeiw_Load(object sender, EventArgs e)

{

}

}

}

JournalView

using System;

using System. Collections. Generic;

using ponentModel;

using System. Data;

using System. Drawing;

using System. Text;

using System. Windows. Forms;

using print;

namespace printing

{

public partial class JournalVeiw : printing. PrintingView

{

public JournalVeiw()

{

InitializeComponent();

}

public JournalVeiw(Printing printing):base(printing)

{

InitializeComponent();

FromContentJournal();

}

private void FromContentJournal()

{

var printing = (Journal)Print;

NumberOfPages. Text = printing. Pages. ToString();

Number. Text = printing. Number. ToString();

}

private void JournalVeiw_Load(object sender, EventArgs e)

{

}

}

}

Program. cpp

using System;

using System. Collections. Generic;

using System. Linq;

using System. Windows. Forms;

namespace printing

{

static class Program

{

/// <summary>

/// The main entry point for the application.

/// </summary>

[STAThread]

static void Main()

{

Application. EnableVisualStyles();

Application. SetCompatibleTextRenderingDefault(false);

*****n(new MainForm());

}

}

}

Вывод

В ходе данной лабораторной работе я научился применять механизм событий, создавать графический интерфейс при помощи Windows Forms в среде Visual Studio, ознакомился с имеющимися компонентами, формами, их свойствами и событиями, научился создавать диалоговые окна и связывать их между собой.