Wrapping Up Chrys`s Approach to Active Client Pages

Description

Let us look at a simple example here. The session begins with a master window. This master window has the possibility of producing only one window. The second window can produce two windows. One of these two windows can produce another window, while the other one can produce two documents. The second document produced can produce a window. The following tree represents this:

Fig. 12.1 An ACP Tree

From the diagram, at level 0 you have the master window. At level 1 you have a window that is produced by the master window. At level 2 you have two windows. At level 3 you have one window and two documents. At level 4 you have one window.

The window at level 0 (the master level) has a button. When this button is clicked, the window for level 1 will open. The window at level 1 can produce two windows. It has two buttons; each button produces a window. The windows produced are alternate windows. One of them is identified as page2_1, while the other is identified as page2_2.

Note that the two documents indicated can only be produced in sequence. The same window has to produce one document, before this document produces the other. The windows are represented by small discs and the documents are represented by small circles. This is my way of representing the windows and documents.

The use of a tree for ACP pages is just one of my enhancement to ACP. Note: apart from the master page (first window), any other window or document is produced at the client’s browser.

The window for page2_1 has a button, which, when clicked, would produce a window at level 3. This window at level 3 has a button that, when clicked, would display a value for a JavaScript variable residing in the master page, in an alert box.

The second document produced, at level 3, can produce a window. This document has a button that, when clicked, would produce a window at the fourth level. This document actually has two buttons; the other one will display the value of a JavaScript variable in the window of page2_2. The window at the fourth level does not have any buttons.