OtfGenericScreen
Introduction
The HMI extension (Human Machine Interface) provides access for interacting with the user through the display of graphical screens. To achieve this goal, there are two ways to operate with screens:
- Basic Screen - A set of basic dialogs providing by the operating systems
- Custom Screens - Customizable screens that allow arbitrary flexibility
Custom screens only define an interface to a screen. The screen itself is externally created. The layout and functionality of this screen is not defined in the OTX. The interface to the screen is the OTX Screen Signature. A Screen Signature defines all IN-, OUT- and INOUT-Parameters of a screen. The OTX Runtime have to map the Screen Signature Parameters to the proper screen controls. The OTF supports two kinds of Custom Screens:
Generic Screen
As the name said, Generic Screen is completely data driven. Only the Screen Signature have to define. Via Data Binding mechanism the screen controls will be updated automatically and vice versa. Particular attention is paid to the category attributes of the parameters. Each category is mapped to a Pane inside the Form layout. The default layout can be used or the layout can be adapted. In most cases, the supplied default layout is sufficient. The next section shows how the layout can be changed.
Generic Screen Layout
The layout of the Generic Screen is stored in a XML file...
