© 2008 Sooloos LLC
Page Selection Behavior
Page 7
The Sooloos module controls three logical pages of data which every touch panel project should
implement.
•
Now Playing Page
The “Now Playing” page is where the system transport controls live. These allow the user to pause,
play, stop, change to the next or previous track, etc. The “Now Playing” page is displayed when the
page_transport output is pulsed high.
•
Browse Page
The “Browse” page is where the system allows the user to navigate through the various data within
the system and to perform actions on the data. The module refers to the data displayed on this
page as items within the various join names. Data is represented generically so that the user can
use the same interface for selecting songs, adding a playlist to the queue, deleting a collection,
swimming within a genre, or any other action the server exposes now and in the future. For each
data item, there are potentially actions which can be performed on that item, or the item itself can
be selected. Selecting an item is referred to as refining in the join nomenclature. The module in-
structs the touch panel what state each item is in (e.g. does not exist, exists, exists with actions) so
that the appropriate interface can be displayed to the user. This state is in the form of analog joins
named item#_button_state which is used in the Sooloos VT Pro-e projects to directly control but-
ton modes. The “Browse” page is displayed when the page_browse output is pulsed high.
•
Confirm Subpage
The “Confirm” page is used by the module whenever there is an action on an item which requires
confirmation due to its potential for unwanted side effects or loss of data (e.g. deleting a playlist).
The “Confirm” page is temporarily displayed whenever the page_confirm output is pulsed high.
When this output is high, the confirm_yes or confirm_no input is used to dismiss the page and
re-raise the page_browse output high. This subpage can be shown over the “Browse” page. The
module will only ever pulse page_confirm if page_browse was the last page to be pulsed high.
•
Zone Waiting Subpage
The “Zone Waiting” subpage is intended to be displayed to the user whenever the zone_valid
output is dropped low. This indicates that the module lost connection to the Sooloos server for
some reason. After reconnecting, the zone_valid output will be raised high again and the subpage
should be hidden. It is recommended that the subpage simply be a black background full-screen
subpage stating “Waiting for Sooloos Zone…”. This subpage can be shown over the “Now Playing”
page. The module will always pulse page_transport high prior to lowering zone_valid.
In order to join the zone_valid output to a subpage, it is necessary to negate it by using a NOT
symbol. The resulting zone_not_valid output from the NOT symbol can be used as the subpage
join in the VT Pro-e project.
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Module Guide
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