Chapter 1. A new design for the Web
Figure 1.1. This desktop spreadsheet application illustrates a variety of possibilities for user interaction. The headers for the selected rows and columns are highlighted; buttons offer tooltips on mouseover; toolbars contain a variety of rich widget types; and the cells can be interactively inspected and edited.
Figure 1.2. Schematic architectures for a standalone desktop application. The application runs in a process of its own, within which the data model and the program logic can “see” one another. A second running instance of the application on the same computer has no access to the data model of the first, except via the filesystem. Typically, the entire program state is stored in a single file, which is locked while the application is running, preventing any simultaneous exchange of information.