Input Options

This chapter is about how grid elements can be selected with different input modalities.

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Clicking on Button “Input Options” in Main view opens a configuration modal:

input options

These are the possible options:

  1. Enable Scanning: enables the “scanning” method, which means that grid elements are consecutively highlighted and the user can select the desired element just by a single input channel, e.g. a single keyboard key or a tap anywhere on the touch-screen.
  2. Enable Hovering: enables the “hovering” input method, which means that grid elements selected by keeping the mouse cursor positioned on an element for a specific amount of time. On a touchscreen it means that elements are selected by tap-and-hold on them for some duration.
  3. Hover Time: the time in milliseconds to dwell on an element in order to select it (if hovering enabled)
  4. Select with mouse click: selects an element by just clicking on it (tap on touchscreen)
  5. Cancel: discard changes and close the modal
  6. OK: save changes and close the modal

Scanning options

If scanning is enabled there are several additional options for this input method:

input options

  1. Vertical scanning defines the direction of scanning:
    • vertical (checked): groups are built vertical, moving left to right
      vertical scanning
    • horizontal (unchecked): groups are built horizontal, moving top to bottom
      horizontal scanning
  2. Binary scanning defines if scanning groups are rows/columns or one half of existing elements:
    • binary (checked): groups are built by separating remaining elements in two halves each scanning step
      binary scanning
    • horizontal (unchecked): groups are built row/column by row/column
      non-binary scanning
  3. Scanning Time: time to wait between two scanning steps (in milliseconds)
  4. Time factor first element: the time to keep the first scanning group (e.g. first row/column) highlighted is “Scanning Time” multiplied with this factor. Increasing the time for the first group often improves usability.
  5. Scanning keyboard key: defines which key of the keyboard is used to select the currently highlighted scanning group (default: Space). To change press “Record other key” and press the desired key afterwards.
  6. Scanning ARE events: makes it possible to select the current scanning group by any event from the AsTeRICS Framework. Set it up this way:
    • Start the AsTeRICS Framework (ARE) with the desired model (e.g. a model generating an event when moving the head)
    • Click on “Record ARE Events” in AsTeRICS Grid
    • Trigger the desired event in the running model (AsTeRICS Framework), e.g. move the head
    • recored events are now listed in the AsTeRICS Grid input configuration, press OK in order to apply the changes
    • Scanning groups now can be selected by triggering the recorded event in the AsTeRICS Framework (e.g. moving the head)

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