1. Updated the empty state of the all printers activity to show no printers message
if the user is searching and there are no matches and a searching for printers
message if the user is not filtering the printers list.
2. Adding the fake PDF printer after the historical printers are loaded to avoid the case
where we select the PDF printer and immediately after that the most used printer is
selected resulting in an undesirable UI flicker.
3. Fixed a bug where if the most used printer which is initially considered unavailable
is reported by the print service as available but the UI is not properly updated
leaving the user in no way to click on the print button.
bug: 10983508
Change-Id: I60fdb7761332850fd5b9ffc0cb572a6213024dba
1. The print dialog was resizable and as a result when printers
come and go its size changes which looks bad. The dialog is
now trying to be maximally large limited by a max size or the
screen - whichever is smaller. This required moving from
GridLayout to several LinearLayouts since the former does not
support distribution of empty space evently between the items
in a row. Also we want all items in a column of inputs to be
of equal size (the spinners specifically).
2. Added labeledBy attribute to associate a view with another one
that serves as its label for accessibility purposes. We have
lebelFor attribute but it is not useful in most layout files
since it has to refer the auto-generated id of a view which
usually appears later in the layout file, thus generating a
compilation error. This was needed for the accessibility support
of the print dialog.
bug:10631660
2. Disabling the spinners or the print button did not produce
visual feedback leading to user frustration.
bug:10741907
Change-Id: I0c12eddabc4035bc7becd1b86c1f1b8fdcf4289c
1. Added support for selecting a printer from the all printers activity
that is not in the initial printer selection drop down. The user
initially sees a sub set of the printers in the drop down and the
last option is to see all printers in a separate activity. Some
of the printers in the all printers activity are not shown in the
initial drop down.
2. Refactored printer discovery by adding (private for now) printer
discovery app facing APIs. These APIs are needed to support multiple
printer selection activities (print dialog and all printers activities)
and also the settings for showing all printers for a service.
Now multiple apps can request observing for printers and there is
a centralized mediator that ensures the same printer discovery
session is used. The mediator dispatches printer discovery specific
requests to print services. It also aggregates discovered printers
and delivers them to the interested apps. The mediator minimizes
printer discovery session creation and starting and stopping discovery
by sharing the same discovery session and discovery window with
multiple apps. Lastly, the mediator takes care of print services
enabled during discovery by bringing them up to the current
discovery state (create discovery session and start discovery if
needed). The mediator also reports disappearing of the printers
of a service removed during discovery and notifies a newly
registered observers for the currnet printers if the observers are
added during an active printer discovery session.
3. Fixed bugs in the print UI and implemented some UX tweaks.
Change-Id: I4d0b0c5a6c6f1809b2ba5dbc8e9d63ab3d48f1ef
1. Refreshed the print UI based on UX redlines.
2. Implemented tap outside cancel for the print job config activity
which is full-screen but pretends to be a dialog.
Change-Id: I5afc7cd40c696109d70af31536898cfcad91b2ab
