1. Interactive GUI Construction Reusing standards components vs. ad hoc graphics to better fit the affordances of the task

2. Direct Manipulation Display the available objects and their state Fast, incremental, reversible actions Display available actions

3. « Business Graphic Objects » Define the visual representation in a graphical editor Link graphic objects and data objects with relations The application is defined in a regular programming language

4. Synoptics, Process control

5. Specialized Editors Transformation Editor Brush Editor (24 attributes) Replace regular forms

6. Sample applications ATC Cartography

7. Drawing editor Draw the objects and access them by name in a script language

8. Relationships Expression Example: thermometer Export gauge.value Condition: if val>30 –gauge.color=“ Red” else gauge.color=“Blue” Condition: if val>60 –blink=True else –blink=False gauge scale ellipse

9. Models & Libraries Un BGO peut être utilisé tel quel (composition) ou instancié Une instance ne stocke que ses valeurs publiques Un prototype correspond à une classe de l’application Les BGO sont organisés en bibliothèques

10. BGOs summary Graphical Interface to define Graphical User interfaces Matches the application’s structural design –Regular Programming Environment for the logical part –GUI to build the graphical representation of objects Matches the design process –Separates clearly the logical model from the conceptual model and from the representation –Encourages creation of high quality GUIs