Wrap-Up

Answers to Self Review Exercises

14.1

a) False. Menus provide groups of related commands. b) True. c) False. Both controls can have single or multiple selection. d) True. e) True. f) False. The user can select one or more items. g) True. h) False. Only an MDI parent window can have MDI children. An MDI parent window cannot be an MDI child. i) False. MDI child windows cannot be moved outside their parent window. j) False. There are three ways: 1) Derive from an existing control, 2) use a UserControl or 3) derive from Control and create a control from scratch.

14.2

a) Start. b) scrollbar. c) root. d) ListView, treeView. e) MdiList. f) UserControl. g) TabControl. h) Cascade. i) LinkLabels.

Exercises

14.3

Write a program that displays the names of 15 states in a ComboBox. When an item is selected from the ComboBox, remove it.

14.4

Modify your solution to the previous exercise to add a ListBox. When the user selects an item from the ComboBox, remove the item from the ComboBox and add it to the ListBox. Your program should check to ensure that the ComboBox contains at least one item. If it does not, print a message, using a message box, then terminate program execution when the user dismisses the message box.

14.5

Write a program that allows the user to enter strings in a TextBox. Each string input is added to a ListBox. As each string is added to the ListBox, ensure that the strings are in sorted order. [Note: Use property Sorted.]

14.6

Create a file browser (similar to Windows Explorer) based on the programs in Fig. 14.14, Fig. 14.28 and Fig. 14.31. The file browser should have a treeView, which allows the user to browse directories. There should also be a ListView, which displays the contents (all subdirectories and files) of the directory being browsed. Double clicking a file in the ListView should open it, and double clicking a directory in either the ListView or the TReeView should browse it. If a file or directory cannot be accessed because of its permission settings, notify the user.

14.7

Create an MDI text editor. Each child window should contain a multiline RichTextBox. The MDI parent should have a Format menu, with submenus to control the size, font and color of the text in the active child window. Each submenu should have at least three options. In addition, the parent should have a File menu, with menu items New (create a new child), Close (close the active child) and Exit (exit the application). The parent should have a Window menu to display a list of the open child windows and their layout options.

14.8

Create a UserControl called LoginPasswordUserControl. The LoginPasswordUserControl contains a Label (loginLabel) that displays string "Login:", a TextBox (loginTextBox) where the user inputs a login name, a Label (passwordLabel) that displays the string "Password:" and finally, a TextBox (passwordTextBox) where a user inputs a password (do not forget to set property PasswordChar to "*" in the TextBox's Properties window). LoginPasswordUserControl must provide Public read-only properties Login and Password that allow an application to retrieve the user input from loginTextBox and passwordTextBox. The UserControl must be exported to an application that displays the values input by the user in LoginPasswordUserControl.

14.9

A restaurant wants an application that calculates a table's bill. The application should display all the menu items from Fig. 14.53 in four ComboBoxes. Each ComboBox should contain a category of food offered by the restaurant (Beverage, Appetizer, Main Course and Dessert). The user can choose from one of these ComboBoxes to add an item to a table's bill. As each item is selected in the ComboBoxes, add the price of that item to the bill. The user can click the Clear Button to restore the Subtotal:, Tax: and Total: fields to $0.00.

Figure 14.53. Food items and prices.

Name	Category	Price
Soda	Beverage	$1.95
Tea	Beverage	$1.50
Coffee	Beverage	$1.25
Mineral Water	Beverage	$2.95
Juice	Beverage	$2.50
Milk	Beverage	$1.50
Buffalo Wings	Appetizer	$5.95
Buffalo Fingers	Appetizer	$6.95
Potato Skins	Appetizer	$8.95
Nachos	Appetizer	$8.95
Mushroom Caps	Appetizer	$10.95
Shrimp Cocktail	Appetizer	$12.95
Chips and Salsa	Appetizer	$6.95
Seafood Alfredo	Main Course	$15.95
Chicken Alfredo	Main Course	$13.95
Chicken Picatta	Main Course	$13.95
Turkey Club	Main Course	$11.95
Lobster Pie	Main Course	$19.95
Prime Rib	Main Course	$20.95
Shrimp Scampi	Main Course	$18.95
Turkey Dinner	Main Course	$13.95
Stuffed Chicken	Main Course	$14.95
Apple Pie	Dessert	$5.95
Sundae	Dessert	$3.95
Carrot Cake	Dessert	$5.95
Mud Pie	Dessert	$4.95
Apple Crisp	Dessert	$5.95

14.10

Create an application that contains three TabPages. On the first TabPage, place a CheckedListBox with six items. On the second TabPage, place six TextBoxes. On the last TabPage, place six LinkLabels. The user's selections on the first TabPage should specify which of the six LinkLabels will be displayed. To hide or display a LinkLabel's value, use its Visible property. Use the second TabPage to modify the Web page that is opened by the LinkLabels. [Note: To change the LinkLabels' Visible properties, you will need to change the currently displayed TabPage to the last one. To do this, use the TabPage's SelectedTab property.]

14.11

Create an MDI application with child windows that each have a Panel for drawing. Add menus to the MDI application that allow the user to modify the size and color of the paint brush. When running this application, be aware that if one of the windows overlaps another, the Panel will be cleared.

Multithreading