pull up r19860 from trunk

pull up r19860 from trunk

 r19860@cathode-dark-space:  jaltman | 2007-08-24 10:38:45 -0400
 ticket: new
 subject: NIM: Selection Issues
 component: windows

 Credentials selection in Network Identity Manager has usability
 issues due to the following causes:

 - The "cursor row" is not always selected.

   The "cursor row" is the row which the "cursor" is on. Navigating the
   credentials view using the keyboard or clicking the credentials
   display with the mouse will move the cursor to different rows.
   However, this cursor row is not always selected, especially when
   Network Identity Manager starts.

   Having the selection be independent of the cursor row is a
   requirement for supporting "toggle" selections (holding the 'ctrl'
   key while clicking), which is a standard way of doing multiple
   selections on Windows.

   The problem with the cursor row not being selected when Network
   Identity Manager starts is due to the delayed start of its plug-ins.
   Even though the first row is initially selected, when plug-ins
   complete initialization and notify the application about the
   credentials that they see, those credentials end up accumulating
   under different identities.  The existing code didn't enforce the
   selection state of the identity on the newly added
   credentials. Since there were unselected credentials under the
   selected outline level, the code would then turn off the selected
   bit for the outline (which usually is an outline level for an
   identity) for consistency.

   The patch changes the behavior to enforce the selection state of the
   enclosing outline on any new outline levels or credentials that are
   added under it.  This prevents an outline level from losing its
   selection state when new credentials are added under it.

 - Identities may have stale data associated with it.

   The credentials view maintains a set of cached properties for each
   identity that has credentials.  During each refresh cycle, it would
   go through the credentials and update the properties of each
   identity.  However it would not update the properties for identities
   that are not associated with any credentials.

   When the credentials associated an identity were deleted, the cached
   properties for that identity sometimes never got reset.  If the
   identity was marked as "always visible", then it would be listed in
   the credentials view along with the stale properties.

   This patch properly initializes the properties of identities which
   are not associated with any identities.

 - Selection state is not updated when switching views.

   The credentials view maintains selection state for individual
   credentials when switching views.  The same is not true for the
   outlines since the outline needs to be reconstructed during the
   switch.

   The exising code failed to update the selection state of the
   outlines after switching the view to reflect the the selection state
   of the credentials.  As a result, once a the user switched a view,
   she might see outline levels which do not appear to be selected even
   though all the credentials contained at the outline level appear
   selected.

   This patch properly adjusts the selection state of outline nodes to
   correspond to the selection state of the contained credentials.

 - Selection state may be inconsistent when more than one credential is
   associated with a single row.

   Some rows may represent more than one credential.  A collapsed
   outline represents all the credentials contained within that outline
   level.  In addition, two credentials that will appear the same to
   the user (because all the displayed properties are the same) will be
   represented by one row.

   The selection state of these rows should be consistent with the
   selection state of all the credentials that it represents.  The
   previous code did not enforce this constraint. This patch aims to
   fix this by enumerating all the credentials that are represented
   by each row and setting the selection state of each credential to
   match the selection state of the row.

ticket: 5681
version_fixed: 1.6.3

git-svn-id: svn://anonsvn.mit.edu/krb5/branches/krb5-1-6@19995 dc483132-0cff-0310-8789-dd5450dbe970