The Create ADF Swing Empty Panel/InternalFrame dialog lets you create either an empty panel or internal frame. Select P anel to create an empty panel. In the dialog, the name you enter becomes the Java class that defines the panel for containing databound UI components.
When you select the
Generate a runnable panel/frame
option, JDeveloper adds a
main statement to the Java class and generates a standard JPanel Swing container that is made runnable by the creation of a test frame in which to execute the panel. This allows you to test your ADF Swing panel individually (without the use of a frame that contains the ADF Swing bootstrap code).
When you click OK, JDeveloper does the following:
The initial panel in the visual editor is empty because it does not yet contain databound UI components. The Structure window also shows no component hierarchy under the UI node.
OrderItemsPanel.java source file contains several calls from the Oracle ADF Swing API that will enable data binding and interoperation with the Oracle ADF model layer. To see the code, click
Source at the bottom of the editor window.
Specifically, the generated source code contains:
JUPanelBindingobject and to load the metadata for the bindings on that object. The creation of the panel binding is an important part of the ADF Swing functionality, which enables data binding for Swing components.
Note: Initially, when an empty panel appears in the project no bindings have been defined. The metadata gets defined when the application developer lays out the empty panel using JDeveloper data binding tools.
main()method that calls
setBindingContext()on the panel. This method itself calls the method to start the test frame, which takes as an argument the
.cpxfile specifies a connection to the business service implementation instance (for example, an ADF Business Components application module instance) using the ADF data control for the instance, plus the ADF binding context. Ultimately,
setBindingContext()makes the ADF binding context available to the runnable panel.
Later you will use the Data Controls panel to lay out the detail panel with databound UI with ADF Swing components. But first, the detail panel requires its own layout manager setting. While JDeveloper does not prevent you from setting different layout managers across the various containers of your form, in actual practice you will probably want to work with the same type of layout manager used for the master form. Resizing behavior can differ between different types of layout managers, and this can create undesired effects in the UI as the user resizes the window.
In the next step you will use the Property Inspector to select BorderLayout as the layout manager for the empty panel you created.
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