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Actually, this exercise exposes some of the shortcomings of the Core Data Assistant. Apart from the interesting ordering of controls, there are a couple of problems with the controls themselves. First, the Notes field ought to be a Text View, not an Image Well. Second, the field where you are intending to put the subscription expiry date is a Text Field (albeit one with a Date Formatter), which is not the friendliest way to enter a date. These are indicated in Figure 5 8. These are easy enough to rectify. Just drag out a Text View control and a Date Picker control and drop them in a convenient place in the window. Don t delete the existing controls yet they have some useful information to impart! The biggest benefit of the Core Data Assistant is that it doesn t just create user interface objects for you it also creates and connects these controls to the appropriate controllers using Data Bindings. Let s see how this works. Select the Text Field for the date attribute (the little orange button that appears next to it, by the way, is the formatter use this to configure the format of the content of the Text Field) and then choose the Bindings tab in the Inspector. See Figure 5 9.

function Get-ComRSS { param($url = $(throw "You must specify a feed URL to read")) $objHTTP = new-object -com winhttp.winhttprequest.5.1 $objHTTP.Open("GET",$url,$false) $objHTTP.SetRequestHeader("Cache-Control", "no-store, no-cache, must-revalidate") $objHTTP.SetRequestHeader("Expires", "Mon, 26 Jul 1997 05:00:00 GMT")

Summary

DocumentException is the most general exception in iText. It can occur in step C or step E of listing 1.1. For example, if you try adding a Paragraph before you ve

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For the past several chapters, we ve been focusing on what could be considered the back end of Cocoa programming, the model and controller classes that provide functionality to help take care of your application s infrastructure. Now it s time to turn our attention to the front end of Cocoa, and pay more attention to the view part of the MVC architecture. In this chapter, we re going to focus on windows (not the Microsoft kind), menus (not the restaurant kind), and sheets (not the bed kind), all of which are high-level GUI objects that practically no Cocoa application can do without. Windows provide the foundation for view objects to do their drawing. In Cocoa, these are represented by NSWindow, its direct subclass NSPanel, and several specialized subclasses. Menus provide the familiar top-of-the-screen access to system-wide and application-specific user actions that most Mac applications have, and are represented by a hierarchy of NSMenu and NSMenuItem objects. Sheets provide an alternative to the classic free-floating modal window by letting you attach a modal window as an overlay on an existing window, giving the user a more coherent interface. We re going to explore each of these three areas in a lab, a toy application that has no real use, and is only created for demonstrating some functionality and letting you see how these things work.

Clearly, the holiday entries have a coding system all their own, and it wouldn t be fair to force code elsewhere in the application to deal with all the complexities of holiday date comparisons. So, let s add a public method to the class that indicates whether a given date matches the holiday stored in an instance.

finder method has the responsibility of returning all columns for a particular row, and that the row is identified using a unique identifier. This is often a primary key or other unique column. The IDEnumerator only returns the Identifier column. The ID Enumerator gets called first; every ID value is returned for the Identifier. This is then followed by the specific finder, which returns all of the other columns for each row that was identified. Each entity can only have one IDEnumerator. If you don t create an IDEnumerator, you won t be able to search the business data for that particular entity.

without any help from a visual designer because it can t currently handle templates. Listing 13.4 shows what the final style should look like.

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