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The ListView and TreeView classes discussed in chapters 14 and 15 present a collection of objects within a single list or tree control. These are especially useful when creating an explorer-style interface such as our MyAlbumExplorer application, or the common Windows Explorer application. Another kind of interface is the multiple document interface, also called an MDI (normally pronounced em-dee-eye). An MDI application presents a collection of forms within a single application window. We will discuss MDI applications through the following discussion areas: Understanding various interface styles. Creating an MDI container window. Converting an SDI application into an MDI application. Using MDI-related class members of various controls. Merging two menus into a single merged menu. Managing menus and forms in an MDI application. These topics will be covered as we progress through the chapter, beginning with the concept of interface styles.

The terminate( ) and unexpected( ) functions simply call other functions to actually handle an error As just explained, by default terminate( ) calls abort( ), and unexpected( ) calls terminate( ) Thus, by default, both functions halt program execution when an exception handling error occurs However, you can change the functions that are called by terminate( ) and unexpected( ) Doing so allows your program to take full control of the exception handling subsystem To change the terminate handler, use set_terminate( ), shown here: terminate_handler set_terminate(terminate_handler newhandler); Here, newhandler is a pointer to the new terminate handler The function returns a pointer to the old terminate handler The new terminate handler must be of type terminate_handler, which is defined like this: typedef void (*terminate_handler) ( );

The Blu-ray Disc format is based on or has borrowed from dozens of standards developed over the years by many organizations Most of the standards in this appendix are a normative part of the format Some, such as CD and Video CD, are for players that choose to implement the format Many standards and specifications have been updated since most of the Blu-ray format was finalized in 2005 The best practice is for players to implement the latest version (as long as it does not change things in a way that would cause compatibility problems) and for discs to implement the older version specified here Blu-ray format updates after 2008 may refer to newer versions of the standards and specifications listed here

Before we discuss exactly how multiple document interfaces are created, let s take a step back and consider the various types of application interfaces used for Windows applications. Most Windows applications fall into one of three interface categories: Single document interfaces. Explorer interfaces. Multiple document interfaces. We will discuss each type of interface separately.

The only thing that your terminate handler must do is stop program execution It must not return to the program or resume it in any way To change the unexpected handler, use set_unexpected( ), as shown here: unexpected_handler set_unexpected(unexpected_handler newhandler); Here, newhandler is a pointer to the new unexpected handler The function returns a pointer to the old unexpected handler The new unexpected handler must be of type unexpected_handler, which is defined like this: typedef void (*unexpected_handler) ( ); This handler may itself throw an exception, stop the program, or call terminate( ) However, it must not return to the program Both set_terminate( ) and set_unexpected( ) require the header <exception> Here is an example that defines its own terminate( ) handler

// Set a new terminate handler #include <iostream> #include <cstdlib> #include <exception> using namespace std; void my_Thandler() { cout << "Inside new terminate handler\n"; abort(); } int main() { // set a new terminate handler set_terminate(my_Thandler); try { cout << "Inside try block\n"; throw 100; // throw an error } catch (double i) { // won't catch an int exception // } return 0; }

SINGLE DOCUMENT INTERFACES A single document interface, also called an SDI, is an interface that displays a single document or other encapsulated data within a single form. Our MyPhotos application, as shown in figure 16.1, is a good example of this style, in which a single photo album is displayed. The user can look at multiple photo albums only by examining one after another. The contents of two albums cannot be compared unless two copies of the program are running. In the Windows operation system, the Notepad and WordPad applications provide additional examples of the SDI style.