Composite Elements
Use
When you create BSP applications with BSP extensions, it may not be easy to use elements that are essentially simple BSP elements. To generate the layout you require, you often need a number of special elements. In such cases, you can create composite BSP elements to facilitate handling several special elements, and to minimize the amount of work required to develop BSP applications and their layouts.
The following uses a complex, typical task to display possible solutions. A simple BSP extension is presented and implemented.
Although the example is restricted to three simple input fields, the composite element solution is intended for cases where a number of variable input fields should be displayed, including labels and table-format displays.
Task
Three input fields with labels should be displayed on a screen. Users should enter their name, password and e-mail address in these input fields. The three fields should be arranged under each other.
You should use BSP extension
HTMLB to solve this task, with the following predefined layout elements:Process
Integration
Composite BSP elements use other, already existing BSP elements to generate the output within the layout framework by including and wrapping the BSP elements that already exist.
Prerequisites
You already understand the concept of
BSP extensions and their implementation.Activities
Create page before.htm Design solution Create a new BSP extension with elements Create page after.htm Dynamically process BSP elements Create a new BSP extension with composite elements Step 1 a) Implement <sf:SimpleFormItem> Step 1 b) Use <htmlb:SimpleFormItem> Step 2: Create <sf:SimpleForm> Step 3: Changes to the Look and Feel