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CHAPTER 2 NAVIGATING THE REALBASIC INTEGRATED DEVELOPMENT ENVIRONMENT Note This application uses REALbasic s HTMLViewer control to create a custom web browser. This control is different than most other REALbasic controls in that it depends on other software being installed to work correctly. For the RB Book Browser application to run on Windows, Internet Explorer (IE) must be installed. To run the RB Book Browser application on Mac OS X, the Apple WebKit must be installed. Mac OS X s default browser, Safari, also uses the Apple WebKit to run. To run on Linux OS, the Mozilla browser must be installed. While you can count on your Windows and Mac OS X users to have the required software already installed on their computers, you cannot count on all your Linux users having Mozilla installed. As you can see, cross- platform application development is a challenge. The RBBookFinder Browser The RBBookFinder Browser, shown in Figure 2-19, is a custom-designed web browser designed to assist the user in locating computer and Information Technology (IT) books on the Internet. Figure 2-19. A look at the finished RBBookFinder browser application As you learned in Chapter 1, you typically follow a distinct series of steps in the development of a new REALbasic application. These steps include developing the application s interface, modifying window and control properties, adding program code, and application testing. You follow this same basic design process as you work your way through the creation of the RBBookFinder Browser. Note As you work your way through the development of the RBBookFinder browser application, focus on your interaction with the IDE and its various components. The development of the RBBookFinder Browser involves little program code and, for now, you should simply type in program statements as instructed.
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CHAPTER 2 NAVIGATING THE REALBASIC INTEGRATED DEVELOPMENT ENVIRONMENT Figure 2-18. Searching the REALbasic Language Reference for information on errors, as shown here on Mac OS X. Building a Custom Web Browser One of the goals of this book is to ensure that you get the opportunity to create a new application in every chapter. So, before wrapping up your work on this chapter, take a few minutes to develop your next REALbasic application. To help streamline presentation, the demonstration of how to build this application is done entirely using REALbasic for Windows. As a result, some minor tweaking may be required to ensure it will run on Macintosh and Linux. Specifically, you may need to resize and adjust the location of controls a bit to make sure they display correctly on other versions of REALbasic.
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CHAPTER 2 NAVIGATING THE REALBASIC INTEGRATED DEVELOPMENT ENVIRONMENT Figure 2-17. Using the REALbasic Language Reference to learn about programming language keywords, as shown here on Mac OS X. At the top of the Language Reference dialog, you can see Forward and Back buttons that let you navigate through the data you ve viewed while using this dialog. The Home button returns back to the listing of categories you see when the Language Reference first opens. Just to the left of the Home button is the Location area. The Location area is used to locate information about a REALbasic object, such as a PushButton or EditField. As you start to type in the name of an object, REALbasic attempts to help you by anticipating the name of the object you are typing and displaying this text in light gray. To accept the REALbasic suggestion, press Tab. If REALbasic has more than one suggestion, it displays three gray dots. To view REALbasic s suggestions, press Tab and a pop-up menu appears, enabling you to use your keyboard s up and down arrows, and Enter or Return to select the appropriate choice. To the right of the Location area is the Search area, which you can use to perform a keyword search on any term. In response, REALbasic displays a list of matching topics from which you can select, as Figure 2-18 shows.
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CHAPTER 2 NAVIGATING THE REALBASIC INTEGRATED DEVELOPMENT ENVIRONMENT Figure 2-16. The REALbasic Language Reference provides easy access to information about REALbasic programming language elements, as shown here on Mac OS X. Tip In addition to accessing the Language Reference from the REALbasic Help menu, you can also open it by either pressing the F1 key or using CTRL-/ on Windows or Linux or by pressing the z-? key on Macintosh. The REALbasic Language Reference is organized into three panes. The left-most pane contains a listing of high-level categories where major programming language elements are logically grouped. When you select a category, a listing of available subcategories is displayed in the middle pane. When you select a subcategory entry, a list of topics is displayed in the right-most pane. To view the available information for any given topic, click its entry in the right pane. For example, Figure 2-17 shows an example of the reference information available for the If Then Else statement.
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CHAPTER 2 NAVIGATING THE REALBASIC INTEGRATED DEVELOPMENT ENVIRONMENT Figure 2-15. REALbasic makes it easy to report errors or submit enhancement requests, as shown here on Mac OS X. Working with REALbasic s Electronic Language Reference REALbasic s Help menu also provides you with access to an electronic copy of the REALbasic Language Reference, shown in Figure 2-16.
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CHAPTER 2 NAVIGATING THE REALBASIC INTEGRATED DEVELOPMENT ENVIRONMENT DOWNLOADING REALBASIC S DOCUMENTATION Copies of the Getting Started, Tutorial, and User s Guide manuals are available as free downloads from the REALbasic website at http://www.realsoftware.com/download/windows/, http:// www.realsoftware.com/download/mac/, and http://www.realsoftware.com/download/ linux/. In addition, you can download a copy of the PDF version of REALbasic s Language Reference manual from each of these web pages. Note REALbasic s online documentation is provided in PDF format. You ll need a copy of the Adobe Acrobat Reader or a similar application installed on your computer before you can view this documentation. Accessing REALbasic s Manuals REALbasic provides access to three manuals. Each of these manuals is designed to serve a different purpose. These manuals include Getting Started. A small REALbasic manual designed as an introduction to REALbasic by guiding the reader through the creation of a sample application. Tutorial. A REALbasic manual designed to provide the reader with a thorough introduction by demonstrating how to create a word-processing application. User s Guide. A REALbasic manual designed to provide a complete overview of REALbasic programming. Note REALbasic s Tutorial and User s Guide are not installed with REALbasic. Instead, you are prompted to download them the first time you try to access them from the Help menu. Accessing REALbasic Online Resources REALbasic s Help menu also provides easy access to two useful online links available at the REALbasic website. These resources include REALbasic on the Web. Opens your default web browser and loads www.realbasic.com, REALbasic s official website. REALbasic Feedback. Opens your default web browser and loads http:// www.realsoftware.com/feedback/, as Figure 2-15 shows. This web page enables you to report problems and submit enhancement requests.
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CHAPTER 2 NAVIGATING THE REALBASIC INTEGRATED DEVELOPMENT ENVIRONMENT REALbasic also uses the Tips bar to display syntax information as you type in your code statements. For example, Figure 2-14 shows an example of how REALbasic displays the syntax required to format a particular programming statement. Figure 2-14. REALbasic displays command syntax, as shown here on Linux, to help you properly formulate statements as you enter your program code. REALbasic s Integrated Help Features From time to time, even the most experienced programmer needs a little help. Fortunately, the REALbasic IDE provides easy access to all of REAL Software s REALbasic documentation. You can find these resources located on REALbasic s Help menu. These resources include access to electronic copies of REALbasic manuals and links to online resources at the REALbasic web- site, as well as access to REALbasic s Reference Manual.
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CHAPTER 2 NAVIGATING THE REALBASIC INTEGRATED DEVELOPMENT ENVIRONMENT REALbasic s Tips Bar One easily overlooked, but exceptionally helpful, feature of REALbasic is the Tips bar located at the bottom of the IDE. Each time you compile an application, REALbasic checks the syntax of your application s programming statements. If it detects an error, REALbasic displays a description of the error in the Tips bar. By looking for this error message, you may be able to quickly determine what went wrong without having to dig through your program code looking for the source of the problem. REALbasic uses the Tips bar to provide you with all kinds of additional information. For example, REALbasic keeps an eye on what you are doing as you work within the IDE and, when appropriate, displays hints in the Tips bar. For example, as Figure 2-13 demonstrates, REALbasic uses the Tips bar to display information about menu and icons, as well as other items found in the IDE. Figure 2-13. REALbasic uses the Tips bar, as shown here on Linux, to provide you with helpful information as you work within the IDE.
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CHAPTER 2 NAVIGATING THE REALBASIC INTEGRATED DEVELOPMENT ENVIRONMENT Figure 2-12. REALbasic s Code Editor, as shown on Windows, provides helpful features, such as automatic code indentation and keyword color coding. Note An event is an action initiated by the user or the application itself. REALbasic is able to detect the occurrence of these events and execute programming statements you associate with them. For example, if the user clicks a PushButton control you added to an application window, the Action event associated with that PushButton is executed. If you supplied any program code for that PushButton s Action event, it is automatically executed.
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CHAPTER 2 NAVIGATING THE REALBASIC INTEGRATED DEVELOPMENT ENVIRONMENT PREVIEWING OS-SPECIFIC VERSIONS OF YOUR MENU SYSTEM REALbasic displays a set of four icons on the left-hand side of the Project toolbar whenever the Menu Editor is displayed. Each of these icons represents one of the OSs supported by REALbasic (Windows, Mac OS X, Classic MAC OS, and Linux). By clicking these icons, you can get a sneak peek at how your application s menu will look when it s run on different OSs. By default, REALbasic automatically creates File and Edit menus for every new application. In addition, REALbasic automatically adds a number of menu items to these two menus, as shown in Table 2-1. As already noted, REALbasic also creates an Apple and REALbasic menu for REALbasic applications compiled to run on the Macintosh OS. Table 2-1. REALbasic Default Application Menu and Menu Items Menu Menu Item File Exit Edit Undo Cut Copy Paste Delete Select All For more detailed information on how to use the Menu Editor to create and work with REALbasic menus, read Chapter 4. The Code Editor You use the Code Editor to type in the program statements for your applications. The REAL- basic Code Editor is divided into two panes. The left pane has a browser-like feature that lets you view and select the objects that make up your application. The right pane provides the workspace where you type in your application s programming statements. In the Code Editor s browser area, shown in Figure 2-12, you see a listing of all the objects that make up your applications. Each object, be it a window or a control or any other object element, has a collection of events associated with it.
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