|Oracle® Application Express Application Builder User's Guide
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A Page Definition is the basic building block of a page. Each page can have buttons and fields (called items), which are grouped into containers called regions. Pages can also have application logic (or processes). You can branch from one page to the next using conditional navigation; perform calculations (called computations); perform validations (such as edit checks); and display reports, calendars, and charts. You view, create, and edit the controls that define a page by accessing the Page Definition.
Topics in this section include:
See Also:"Using the View List on the Page Definition", "Editing a Page Definition", "Editing Page Attributes", and "Using the Page Finder"
You can view, create, and edit the controls that define a page through the Page Definition.
To access the Page Definition for an existing page:
On the Workspace home page, click the Application Builder icon.
The Application Builder home page appears.
Select an application.
The Application home page appears.
Select a page.
The Page Definition appears.
See Also:"Using the Page Finder"
A Page Definition is the basic building block of a page. You use the Page Definition to view, create, and edit the controls and application logic that define a page. The sections that follow describe the different parts of the Page Definition.
Topics in this section include:
A navigation bar appears directly beneath the breadcrumb trail.
Available controls on the page navigation bar include:
View. Controls the current page view. To view alternative reports, make a selection from the list and click Go. See "Using the View List on the Page Definition".
The following buttons appear to the right of the navigation bar:
Run. Submits the current page to the Application Express engine to render viewable HTML. See "Running a Page or Application".
Create. Links to a wizard for creating a page. See "Creating a Page from the Page Definition".
The Run Page, Shared Components, Comment, Lock, Export Page, and Find icons display on the Action bar.
The Run Page icon resembles a small, light green traffic light. Click this icon to render the current page into viewable HTML. When you run a page, the Application Express engine dynamically renders the page based on data stored in the database. See "Running a Page or Application".
The Shared Components icon resembles a small mechanical gear. Click this icon to view a list of shared components and user interface controls that can display or be applied on every page within an application. See "Working with Shared Components".
The Developer Comment icon resembles a green balloon. Use this icon to add comments to an application, a page, or a group of pages. See "Adding Developer Comments".
The Lock icon indicates whether a page is available for editing. If a page is unlocked, the icon appears as an open padlock. If the page is locked, the icon appears as a locked padlock. Click this icon to change the lock status. See "Locking and Unlocking a Page".
The Export Page icon resembles a downward arrow. Click this icon to export the current page. See "Exporting a Page in an Application".
The Find icon resembles a flashlight. Click this icon to search for items, pages, queries, tables, PL/SQL, images, and cascading style sheets (CSS) within the current application or the schemas associated with the workspace. See "Using the Find Icon".
Every Page Definition is divided into three sections:
Page Rendering. Page rendering is the process of generating a page from the database. The Page Rendering section lists user interface controls and logic that execute when a page is rendered. See "About Page Rendering".
Page Processing. Page processing occurs once a page is submitted. Typically a page is submitted when a user clicks a button. The Page Processing section lists logic controls (such as computations and processes) that are evaluated and executed when the page is processed. See "About Page Processing".
Shared Components. The Shared Components section lists common components that can be used by one or more pages within an application. See "About Shared Components".