CHAPTER 5 STORING AND RETRIEVING APPLICATION DATA (Web design careers)
CHAPTER 5 STORING AND RETRIEVING APPLICATION DATA Figure 5-6. RBCalculator is a basic desktop calculator application, as shown on Macintosh. Note As you work your way through the creation of this application, you should be able to follow along and understand the interaction that occurs when the application accesses properties and variables. For pieces of code that have not yet been explained, go ahead and enter them exactly as shown. Once you finish reading Chapter 6, you may want to revisit this example. By that time, you should be ready to take another look at how this application works. Designing the User Interface Users interact with the RBCalculator application through PushButton controls placed on the main application window. Calculations and their results are displayed in an EditField control placed at the top of the window. In addition, a small menu system is available that enables the user to close the application or display additional information about it. To begin the development of this application, open a new project in REALbasic, add the controls listed in Table 5-3, and then modify the window and control properties as shown. Table 5-3. Window and Property Modifications for the RBCalculator Application Object Property Value Window1 Name MainWindow Title RBCalculator EditField1 Name OutputField ReadOnly Enabled Alignment Right Bold Enabled
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