The Page component
The application IDE home page usually leads us to the single most important component in our application the page. The following is a basic description of the application page and its main elements. Detailed discussions will follow throughout the book.
While discussing Session State, it was mentioned that the application page has two major phases in its life cycle; the Page Rendering phase, implemented through the SHOW procedure; and the Page Processing phase, implemented through the ACCEPT procedure. These two phases are clearly manifested in the Page Definition page layout.
The following is a screenshot of a Page Definition page:
The Page Rendering column
The left-hand column on the Page Definition page is all about the page rendering process. It includes six sections Page, Regions, Buttons, Items, Computations, and Processes that allow us, both declaratively and with manual coding, to specify all the parameters and database actions, that will influence the initial page...
