By Boydlee Pollentine
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Additional resources for Appcelerator Titanium Smartphone App Development Cookbook
Informing your users with dialogs and alerts There are a number of dialogs available for you to use in the Titanium API, but for the purposes of this recipe we will be concentrating on the two main ones—the AlertDialog and the OptionDialog. These two simple components perform two similar roles, but with a key difference. The AlertDialog is normally only used to show the user a message, while the OptionDialog shows the user a message plus requires a response from them from a number of buttons. Generally, an AlertDialog only allows two standard responses from the user, OK or Cancel, whereas the OptionDialog can contain many more.
These will be covered in a later chapter. Creating buttons and capturing click events In any given app, you will find that creating buttons and capturing their click events is one of the most common tasks you will do. This recipe will show you how to declare a Button control in Titanium and attach the click event to it. Within that click event, we will perform a task and log it to the Info window in Titanium Studio. This recipe will also demonstrate how to implement some of the default styling mechanisms available to you via the API.
Additionally, Keyboard Toolbars can be created to appear above the keyboard itself, which will allow you to provide the user with other options such as removing the keyboard from the Window, or allowing copy/paste operations via a simple button tap. In the following recipe, we are going to create a toolbar that contains both a system button, and another system component called FlexibleSpace. These will be added to the top of our numeric keyboard which will appear whenever the TextField for amount or interest rate gains focus.