Classes for adding interactivity to the application components. Each DasCanvasComponent has a DasMouseInputAdapter that dispatches mouse events. MouseModules are plug into a DasMouseInputAdapter and receive the mouse events and perform a function based on the input. For example, the CrossHairMouseModule looks up the X and Y coordinates of the pointer during a mouse drag and displays them in a box. A VerticalSlicerMouseModule looks up the Table dataSet column under the click and plots it in a popup window. The MouseModules use DragRenderers to provide visual feedback about the pending operation.

A set of science abstraction level events is defined as well for communication between application components. These include, for example, TimeRangeSelectionEvent and BoxSelectionEvent. For example, a MouseModule might create a BoxSelectionEvent, then send the event off to another module that begins an analysis for the data within the selected box.

Each MouseModule has a DragRenderer which graphically hints at what action is to occur, and the state of the action. For example, the BoxRenderer draws a box where the MouseModule will perform some action (like summing all the data within the box, or resetting the two axes to these new ranges). DragRenderers should work in the pixel space, and the MouseModule does the job of promoting the abstraction from pixels to science data and data units.