Interactors

A document is a body of information that is changed by a set of commands. The user interface for the application organizes these commands. Many commands are invoked non-interactively by way of the menus and other controls. Other commands are invoked during end-user interaction.

In GrafEdit all end-user interaction involves clicking and dragging the mouse on the canvas view to draw and modify canvas graphics. Cursor tools launch interaction by creating and starting interactors, and the interactors create and execute commands. Commands are described under "Commands" on page 82 and cursor tools are described under "Cursor tool handling" on page 96.


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