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These changes permit the ParentForm class to create a new child window containing an open album. Compile and run the application to verify that this works as expected. The File menu from our two classes is now fully merged, and all menus are fully implemented. As can be seen from this discussion, the ability to merge menus provides a powerful mechanism for controlling the menu bar in MDI applications. They permit the exact placement of menu items, and control over which class, the parent or child, will process each item. While we only merged a single menu here, you may find in your

own MDI applications that multiple menus must be merged. The principles and methods for doing this are identical to those utilized here. With our menus completed, the next item in the development of our MDI application is to tidy up other parts of the interface such as the toolbar and the pixel data dialog. This cleanup is our next topic.

Check out the faculty Visit the program s web site to see who it has on staff, then go to the faculty members web pages to find out their current areas of research If the whole program seems to consist of one or two people, beware; they may not be able to offer you the breadth or depth of experience they should Read the professors curriculum vitae (the academic name for a r sum ) to see how long they ve been teaching and what subjects If the faculty s interests don t seem to match any of your own, that s a warning sign Visit the campus If you live close by, contact the department or program and try to arrange for a tour most are happy to hear from prospective students Try to interview a professor or two if any are free while you re there Tell them what you want to learn and ask for their candid opinion whether this is the right program to learn it in Also take special note of any computer labs, video edit suites, or audio recording studios If the gear seems to be old and run-down, or has seen hard use, that tells you that the program doesn t have much money or any ongoing relationships with hardware vendors It s a sad fact that in high technology, richer is better The more new equipment and software they have for you to work with, the better prepared you will be to enter the job market However, don t let yourself be convinced by flashy facilities alone! A great lab won t much help if the faculty is uninterested in games

Our MDI application is coming along nicely. So far we have a parent form that contains MainForm class instances as child forms. Each form displays a new or existing album, and the menu bars have been integrated to present a logical set of choices for the user. There are additional members of the Form class that are related to the creation of MDI applications. This section will examine a few of these members as we correct some issues with our MyPhotos MDI application. If you have experimented with the MyPhotos interface created in the previous section, you may have found the following three issues that do not behave as you might expect. The toolbar control. The toolbar on the child form gives access to the New and Open menu in the MainForm class, which we are trying not to expose in the MDI version of our application. The pixel data form. This dialog appears separate from the MDI application, rather than as a child form within it. In addition, when multiple album windows are open, each window opens its own separate PixelDlg form, which can get rather confusing. Opening multiple albums. If you open the same album twice, you end up with two windows both showing the same album. Aside from the errors that can occur from having two instances operate on different versions of the same album simultaneously, it seems a bit strange to permit two copies of the same file to open in the same parent window. We will address each of these items separately, and make use of MDI-related members of the Form class as required.

REPLACING THE TOOLBAR Our toolbar was designed to interact with the menu bar for our MainForm class, and not the merged menu in our MDI application. As a result, it is no longer appropriate for our purposes. As a simple solution to this problem, we will simply hide the toolbar when the MainForm object is an MDI child form. While we are at it, we can create a very simple toolbar in the ParentForm class to demonstrate such a control in an MDI application. Figure 16.6 shows our application after these changes have been made.