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Data controls provide the abstraction of the business service. Like many artifacts in Oracle ADF, data controls are simply XML definitions of the underlying business services. The XML describes the business service, including what attributes it has and any operations it exposes. So, how do you generate a data control for your business service The good news is that for ADF Business Components, you don t have to. Because the definition of a business service developed using ADF Business Components, specifically the application module, is already XML, ADF Model knows how to work with that definition. Thus, ADF Business Components is already data control ready. All the information defined in the application module, such as the view object instances, their attributes, and their operations, define the fa ade for the business service in a way that ADF Model already understands. This is what you see in the Data Controls panel shown in Figure 11-1.

In this section, you will add a user interface to the script you created earlier Once you have made a task doable in Smile, you may want to make it available for nonscripters to use This interface will allow users to select the PDF they want to edit and specify the text they want to add to it Smile makes creating a graphical interface easy using custom dialog boxes When you save a custom dialog box, you get a document that will open in Smile when double-clicked: each graphical interface can be seen as a separate application able to run in Smile s environment For your first experience of a custom dialog box, you ll keep it simple: you ll have the user enter each quantity as a string, in text fields.

So far you identified the following inputs: the string, the font, the text size, and the location, which consists of two numbers, so you need five text entry fields (editable text boxes) and five static text boxes to let the user know what to type there In your tests, you obtained a reference to the graphic window (w) because you opened the PDF file yourself In a real situation, the user opens a PDF file, and then they may use the custom dialog box to edit the PDF So that the user is able to target any open PDF file (any graphic window), you ll add a sixth text field in which the user will type the name of the window to target.

Obviously, you could design a user-friendly way of targeting the desired window, but for the purposes of this example, let s restrict the tutorial to a simple tool The user will trigger the actions with buttons You won t update the window s display each time the user changes any quantity in the text fields, but rather you ll have the user decide when to show the result: a first button will display the new string with the current settings You also want to validate the current drawing before editing a new string; you need a second button for that To have the dialog box open with one click, you will install it in the User Scripts menu (the menu with a parchment icon).

Suppose you create some part of your business service and don t use ADF Business Components; how do you create a data control for that As you might expect, JDeveloper takes care of this for you. Let s take the simple example of a Java class (note, however, that you would follow the same steps even for something more advanced like a web service). You decide to write a Java class in your business service that returns, for example, the duty manager for today s shift. This is an essential part of the business service and needs to be exposed on the UI via ADF Model. First of all, in the Model project, create the class to implement the business functionality. Select File | New and, in the New Gallery dialog, select Java and then Java Class. Add the following code:

To install a new item in the User Scripts menu, you copy it into a specific location in the user s domain, namely, /User/<login>/Library/Application support/ Smile/User scripts/ This makes you ready to create your Smile tool In the first step, you ll build the interface the dialog box the user will see Then you ll provide the scripts that will bring the dialog box to life..