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DSDP/MTJ/Change UI Style
Use-Case Specification: Change UI Style
1. BRIEF DESCRIPTION
The application allows the user to switch between different screen engines and UI styles (Look and Feel) for them.
2. FLOW OF EVENTS
2.1 Basic Flow of Events
- B1. The user opens the UI designer for the UI container class.
- a) The system lists the available UI styles for the user to select.
- B2. The user decides to switch the UI style which the UI designer currently uses.
- B3. The user selects the UI style he wants to use.
- a) The system redraws the UI for the selected UI style, move and zoom controls as needed, and visualises the new display area. Visualisation takes care of any possible overflow indications when all controls are not (fully) visible in the new UI style.
- b) If there are several screen sizes possible for the UI style, the default screen size is selected.
- B4. Additionally, the user can select the screen size for the UI style (when UI style offers more than one screen size).
2.2 Alternative Flows
- Alternative Flow 1: The new UI style has different resources, e.g. fonts
- A1. When switching the UI style, the new style doesn’t have some resources that the current style has.
- a) The system uses default resources.
- A1. When switching the UI style, the new style doesn’t have some resources that the current style has.
- Alternative Flow 2: The new UI style does not have the screen size of the current style
- A2. When switching the UI style, the new style does not have the screen size that the current style uses.
- a) The default screen size for the new UI style is selected and the UI is repainted accordingly.
- A2. When switching the UI style, the new style does not have the screen size that the current style uses.
3. SUBFLOWS
4. KEY SCENARIOS
5. PRECONDITIONS
5.1 Precondition 1: More than one UI style has been installed
To switch a UI style, the user must have more than one UI style installed. 5.2 Precondition 2: The UI designer is running
Switching between UI styles is only possible when the UI designer is running.
6. POSTCONDITIONS
6.1 Postcondition 1: The UI has been updated for a new UI style
UI components are redrawn according to the new UI style and its screen size.
6.2 Postcondition 2: The screen sizes list is updated
A list of available screen sizes is updated to show the screen sizes of the selected UI style.
7. EXTENSION POINTS
8. SPECIAL REQUIREMENTS
9. ADDITIONAL INFORMATION
Comments:
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