Flash® Builder™ 4 and Flex® 4 Bible

Chapter 17. Working with Pop-up Windows

IN THIS CHAPTER

• Understanding pop-up windows

• Using the Alert class

• Using the PopUpMenuButton control

• Using the PopUpButton control

• Creating and displaying custom pop-up windows

In applications that are built for windows-style operating systems, such as Microsoft Windows, Mac OS X, and the various windowing interfaces on Linux and other operating systems, pop-up windows are commonly used to get the user's attention, provide information, and collect data. Not all Flex applications have or require pop-up windows, but the're a common interface that users of these operating systems easily recognize and know how to use.

Flex applications are able to present pop-up windows in a variety of forms. Whether you want to display a simple information message or create a more customized user experience, you have these options:

• The Alert class. This class creates a simple pop-up dialog box displaying simple String values. You can also use the Alert class to enable the user to confirm or cancel an operation before it's executed, and it can include a custom graphical icon.

• The PopUpMenuButton control. This control displays a two-part Button control that displays a single-level pop-up menu when clicked.

• The PopUpButton control. This control combines a Button with any other visual component that you want to display when clicked.

• Custom pop-up windows. These windows can be created with the TitleWindow container and presented and managed with the PopUpManager class.

In this ...