This ensures that we don't show a small black blob fading away
when the user clicks on the notification and it is removed.
Set HIDING state right away in _hideSummaryBoxPointer() so that
it is only called once. Update this._pointerInTray when the tray
is unlocked, so that we are not dependent on escapeTray() being
triggered by 'done-displaying-content' signal.
https://bugzilla.gnome.org/show_bug.cgi?id=645697
Use Meta.later_add() with BEFORE_REDRAW rather than Mainloop.idle_add()
to add the banner body so that the notification body is reliably added
after the first frame is drawn. This is important for notifications that
are expanded right away, such as the summary notifications that
were not shown as banners because the user was in the Busy mode or was
interacting with the summary. Otherwise, these notifications were sometimes
shown with an ellipsized banner and were only getting full content when
they were done animating.
Only add expanded content and signal the change once. Previously, we
used to signal the change numerous times and processing this signal was
holding up processing other things, such as the user moving the mouse
away from the notification so that the notification collapses.
https://bugzilla.gnome.org/show_bug.cgi?id=645719
Commit 31b12635d1 fixed links in notifications again, but blocked
clicks on normal labels getting through to the notification. Fix
this, so that both links and dismissing notifications work again.
https://bugzilla.gnome.org/show_bug.cgi?id=645839
The change to make Notification an StButton (06d2c0af, bug 642978)
broke links, because the link actor would ignore the
button-press-event, allowing the notification actor to receive it and
get a pointer grab, and so the link actor would never see the
button-release-event. Fix that by accepting and discarding the
button-press-event.
https://bugzilla.gnome.org/show_bug.cgi?id=645613
If a notification was updated while one of its widgets was focused,
it would lose the grab when that widget was destroyed. Fix that by
moving the focus to a safe place before destroying the old widgets.
https://bugzilla.gnome.org/show_bug.cgi?id=643687
We want to minimize focus stealing from the user. If a non-urgent notification
comes in while the user is interacting with the tray, we add it to the tray
and only show it after the user is done interacting with the tray. If an
urgent notification comes in while the user is interacting with the tray,
we hide the tray and show the urgent notification.
https://bugzilla.gnome.org/show_bug.cgi?id=636838
We want to allow the user to scroll through all notifications from
source by using a single scrollbar. We suppress the individual
scrollbars inside the notifications.
As one exception, we keep the original scrollbar for chat notifications
because it has a distinct look, ending above the text entry box.
https://bugzilla.gnome.org/show_bug.cgi?id=611611
Make summary sources look more clickable and highlight them when selected.
Highlighting the fully expanded summary source when selected matches the
highlighting in the top bar items and teaches the user that any part of the
expanded summary source can be clicked.
Based on the initial patches by Florian Müllner and Jonathan Strander.
https://bugzilla.gnome.org/show_bug.cgi?id=644788
If you have XFixes 5 (and corresponding xserver support) then we
add barriers on the panel and in the message tray corner so that
its easy to reach the corners even when there are monitors to the
sides of the primary monitor.
https://bugzilla.gnome.org/show_bug.cgi?id=622655
If the user clicks on the title of a trayicon's SummaryItem, forward
that click to the trayicon. Also adjust
gnome_shell_plugin_xevent_filter() so that if the trayicon takes a
grab as a result of this, we don't hide the message tray.
https://bugzilla.gnome.org/show_bug.cgi?id=630842
Specify x-fill and y-fill true for the bin that contains the status
icon so the status icon will always be sized to our specified icon
size (24x24). This prevents pathological behavior for legacy status
icons embedded in the tray where an initial allocation at 1x1 before
they had content would "stick", and the icon would permanently
end up 1x1.
https://bugzilla.gnome.org/show_bug.cgi?id=634820
Notification was connecting to button-release-event to decide when to
be dismissed, which caused problems with widgets inside the
notification that reacted to button-press-event but not
button-release-event. Fix this by wrapping the Notification's table in
an StButton and connecting to 'click'.
https://bugzilla.gnome.org/show_bug.cgi?id=642978
When new messages come in we want to scroll down so that the user
sees the incoming messages. The current implementation does not work
because it relies on a synchronous allocation hack which does not work
for unmapped notifications.
Fix that by connecting to adjustment::changed and scroll whenever the
adjustment changes which equals "new messages", "new timestamp" or
"presense change", but don't interference with the user's scroll actions
i.e when the user scrolls back to read something don't scroll to the bottom.
https://bugzilla.gnome.org/show_bug.cgi?id=614977
Remove the hack from Notification.scrollTo because it is unreliable,
the caller should make sure to call scrollTo when it will actually
have the desired effect.
https://bugzilla.gnome.org/show_bug.cgi?id=614977
Showing the right click menu causes errors when ungrabbing focus in this case.
It will soon be impossible to get to the right click menu anyway when a new
notification is showing, because we are never going to show the summary
and the new notification at the same time.
Unset this._expandedSummaryItem if it is the summary item that is being removed.
This avoids "this._sourceTitle.clutter_text is null" error.
Destroy the summary item actor only after calling _unsetClickedSummaryItem()
that disconnects from one of its signals.
https://bugzilla.gnome.org/show_bug.cgi?id=644043
This patch modifies MessageTray behaviour so that normal (not urgent)
notifications are not shown when the user is Busy (they're sent
immediately to the Summary area). When status is then changed,
notifications still pending are shown again.
Additionally, when status is modified from Idle to anything other than
Busy, the message tray is forced open for 4 seconds, so that summary
icons are visible.
https://bugzilla.gnome.org/show_bug.cgi?id=617225
This patch fixes the summary notification reappearing if you click on the
summary item to hide it and hover away. It also ensures that when you click
on any summary item which doesn't correspond to the summary notification
being shown, a new summary notification will replace it right away.
What used to happen is that we'd unset the clicked item in _unlock() that
was called when the focus was ungrabbed because the user clicked outside
of the summary notification, but then would have this._clickedSummaryItem
be null in _onSummaryItemClicked() , and set it to the clicked item all
over again. This patch ensures that we unset the clicked item only when
it is necessary.
We also needed to add the code to call _updateState() again to show a new
summary notification when a previous one was hidden, but
this._clickedSummaryItem was set.
https://bugzilla.gnome.org/show_bug.cgi?id=642005
That way it can be used when other components of the message tray need to
grab focus, such as the summary bubble with multiple notifications or the
summary item's right click menu.
https://bugzilla.gnome.org/show_bug.cgi?id=641810
St.Button 'clicked' signal now has two arguments, and because we are also
passing an action id as an argument to the _onActionInvoked() callback,
we need to have the number of the signal arguments reflected accurately in
the function arguments.
https://bugzilla.gnome.org/show_bug.cgi?id=641809
This makes the animation feel more stable and keeps the left-most item expanded
when you move the mouse to the left in the tray.
The following behavior details are implemented by this patch:
- we wait to collapse an expanded item till after the tray is hidden if
we are hiding the tray
- we don't collapse an expanded item if the summary notification associated
with it is being shown, unless a different summary item is hovered over
- we don't consider the mouse hovering over a summary notification as
hovering over the tray, which allows us to collapse an expanded summary
item if it is not associated with the summary notification being shown
https://bugzilla.gnome.org/show_bug.cgi?id=636930
There are multiple code passes that can result in Notification::destroy()
being called, such as a notification being closed by the application
when it exits and the associated source being removed at the same time.
However, we should only emit 'destroy' for the notification and
do the associated work once.
Notification::destroy() now takes 'reason' as an optional argument.
Calling Notification::destroy() directly when connecting to 'destroy'
on Source, as we did before, was inadvertently passing 'source' as an
argument to the function.
https://bugzilla.gnome.org/show_bug.cgi?id=640976
This fixes emitting NotificationClosed for resident notifications
that are clicked, but are not actually destroyed.
This also ensures that we emit NotificationClosed in all cases when
a notification is destroyed, which can happen when:
- a non-resident notification is clicked
- an action is invoked on a non-resident notification
- an application the notification was associated with is focused
- a transient notification is done showing
- a notification was requested to be closed by the application
- a tray icon the notification was associated with is removed
https://bugzilla.gnome.org/show_bug.cgi?id=638071
This fixes the problem of chat notifications collapsing and then expanding
again when receiving multiple messages in the expanded new notification.
https://bugzilla.gnome.org/show_bug.cgi?id=629557
Add Util.spawn, Util.spawnCommandLine, and Util.spawnDesktop for
spawning a command/argv/.desktop file in the background, automatically
handling errors via MessageTray.SystemNotificationSource(), and
Util.trySpawn, Util.trySpawnCommandLine, and Utils.trySpawnDesktop
that don't do automatic error handling (but do at least clean up the
error message in the exception a bit).
Update various other bits of code around the shell to use the new
methods.
https://bugzilla.gnome.org/show_bug.cgi?id=635089
Rename imports.misc.utils to imports.misc.util for more consistency
(eg, with shell-util).
Also, use the string-based RegExp() constructor rather than a RegExp
literal, since the literal is extremely difficult to parse correctly,
and confuses emacs and probably other editors and thus messes up
autoindentation, etc.
https://bugzilla.gnome.org/show_bug.cgi?id=635089
Actors in clutter are supposed to be re-allocated with
Clutter.AllocationFlags.ABSOLUTE_ORIGIN_CHANGED if they move relative
to the screen, even if they don't move relative to their parent.
Currently this does not work correctly for actors inside containers
with non-northwest gravity. This is probably a fixable bug, but
gravity has messed up other things in the past too, so let's just not
use it.
This change ensures that summary trayicons are re-allocated when the
summary animates, and is part of the fix for
https://bugzilla.gnome.org/show_bug.cgi?id=635695
Don't do the "slide" effect when moving from one menu to another; only
do it when opening the first menu, or closing a menu without opening
another one.
https://bugzilla.gnome.org/show_bug.cgi?id=634755
Until recently, the clutter keyboard focus was almost always kept on
the stage, and bits of code that wanted to do stuff with the keyboard
would just watch for key-press-events on the stage. In several places,
the code wasn't even bothering to ensure that the focus was on the
stage, which caused problems with other actors that explicitly grabbed
focus.
A previous fix for this (f21403fd) was to always reset the focus to
the stage after calling pushModal(), but a better fix is to just
actually make use of the keyboard focus everywhere rather than having
everyone try to read events off the stage.
Now pushModal(actor) also does actor.grab_key_focus(), and various
bits of code have been changed to read key events off their own
toplevels rather than off the stage, meaning there's no chance of them
accidentally getting someone else's events.
https://bugzilla.gnome.org/show_bug.cgi?id=618885
Transient notifications are removed after being shown. If the summary
is being shown while they appear, they are represented in it by a new
source icon.
We always create a new source for new transient notifications to
ensure that they don't replace the latest persistent notification
associated with the source. Because we generally don't want any
new or resident notifications to be replaced by others, associating
multiple notifications with a source is the next thing we will
implement.
https://bugzilla.gnome.org/show_bug.cgi?id=633412
Resident notifications don't get removed when they are clicked or
one of their actions is invoked, and are only removed when the app
that created them requests them to be removed or sends another
notification.
Remove the source when a notification associated with it is removed.
Except if the source is a tray icon.
Make sure that we pop down the tray when a notification is clicked
or one of the actions of a non-resident notification is selected.
Based on the initial patch by Jonathan Matthew.
https://bugzilla.gnome.org/show_bug.cgi?id=633412
When the last message is older than SCROLLBACK_IMMEDIATE_TIME (1
minutes), show a timestamp in the middle, indicating the time it
was sent.
Use the same style for presence changes, but show them on the left.
https://bugzilla.gnome.org/show_bug.cgi?id=617228
NotificationDaemon-based notifications have markup in the banner/body,
but Telepathy-based notifications don't. (Eg, an XMPP message
containing "<b>foo</b>" should show up angle brackets and all, not as
bold.) Fix MessageTray.Notification to allow explicitly specifying
where there should and shouldn't be markup, and use that
appropriately.
https://bugzilla.gnome.org/show_bug.cgi?id=610219
Switch from St.TextureCache.load_named_icon() to using St.Icon for named
icons. Along with the advantage of getting colorization right for symbolic
icons, this allows moving some icon sizes into the CSS.
In the CSS, the system status icon size is changed to be 1em (=16px for the
default font size), at the request of the artists. See bug 613448.
https://bugzilla.gnome.org/show_bug.cgi?id=633865
Action names sometimes unintentionally overlap with icon names, so
we should only create icon buttons if the message tray source requests
it. For the notification daemon, this is done by setting the
'action-icons' hint on the notification.
The previous notification server capability used to advertise this
feature, "x-gnome-icon-buttons", has been removed in favour of the
new capability described in the notification spec, "action-icons".
https://bugzilla.gnome.org/show_bug.cgi?id=624584
We shouldn't hide the tray as quickly if the user might have left it
unintentionally, such as when moving the mouse over to a different tray item or
using the scroll bar in the chat notification.
https://bugzilla.gnome.org/show_bug.cgi?id=630767
Although within St itself there are situations where the semantics of
these functions (return TRUE or FALSE and return the actual value in
an out parameter) is useful, it's mostly just annoying at the
application level, where you generally know that the CSS property is
going to specified, and there is no especially sane fallback if it's
not.
So rename the current methods to lookup_color, lookup_double, and
lookup_length, and add new get_color, get_double, and get_length
methods that don't take an "inherit" parameter, and return their
values directly. (Well, except for get_color, due to the lack of (out
caller-allocates) in gjs.)
And update the code to use either the old or new methods as appropriate.
https://bugzilla.gnome.org/show_bug.cgi?id=632590
Previously, when you clicked on a notification, it would call
this.source.clicked(), which would emit a 'clicked' signal on the
source, and then various other stuff would happen from there. This
used to make a little bit of sense, when clicking on a notification
was supposed to do the same thing as clicking on its source, but makes
less sense now, when clicking on the source itself *doesn't* call
source.clicked()...
Change it so that when you click on a notification, the notification
emits 'clicked' itself, and the source notices that and calls its
notificationClicked() method, and the various source subclasses do
what they need to do with that, and Source no longer has a clicked
method/signal.
https://bugzilla.gnome.org/show_bug.cgi?id=631042
Redo the way that the summary item expand/collapse animation works so
that the items all resize in unison so that when moving from one to
another, the summary area as a whole stays a constant width rather
than wobbling slightly.
(Also rename all references to the "minimum" summary item title width,
since it's not a minimum, it's just the width.)
https://bugzilla.gnome.org/show_bug.cgi?id=630546
This fixes the bug when the body would be missing from the expanded notification
that has a short body that used to fit in the one-line banner and is expandable
because it has action buttons.
We always want to add the banner to the body of an expandable notification,
unless the notification has custom content. We used to only do that when
creating this._scrollArea for the content. We should also do that when creating
this._actionArea .
https://bugzilla.gnome.org/show_bug.cgi?id=631566
It's possible that an item that was added to the summary got removed before
we had a chance to show the summary because the user has interacted with
the notification (e.g. clicked on an application ready notification). We should
not be showing the summary with an unchanged set of items in this case.
However, it is possible that multiple items were added to the summary before
we had a chance to show the summary, and only some of them got removed. In view
of this scenario, we can't just use a boolean flag to indicate if the summary
needs to be shown, but have to maintain an array of new summary items instead.
https://bugzilla.gnome.org/show_bug.cgi?id=630939
Having the summary pop up automatically after a source icon has been
removed is pretty useless ("Hey, there was something interesting going
on, but you missed it and it's gone now, kthxbye").
https://bugzilla.gnome.org/show_bug.cgi?id=630939
Icons can be loaded as St.Icon.SYMBOLIC, FULLCOLOR, APPLICATION or
DOCUMENT. The first will look for a symbolic equivalent, the second
looks for a full-color version (and does fallback, eg, from
"drive-harddisk-usb" to "drive-harddisk"). APPLICATION and DOCUMENT do
full-color icons without fallback (as specified by the icon spec).
And update various callers to use the right flags.
Based on a patch from Matt Novenstern.
https://bugzilla.gnome.org/show_bug.cgi?id=621311
Previously we were hiding the banner label if the title was too long,
but this causes queue_relayout() warnings. Instead, just set its
opacity to 0.
https://bugzilla.gnome.org/show_bug.cgi?id=629308
This patch ensures the following notifications behavior:
- Urgent notifications that have long title or banner text are auto-expanded
correctly.
- Single-line notifications that have _expandNotification() called (e.g.
because the user mouses over to them), are treated as expanded, which means
they get fully expanded if they are updated with more content and the user
can escape them.
- The position of expanded notifications is updated when they are updated.
- Notification banner is shown again on the first line if it can fully fit
there after a notification is updated, even if it was previously hidden
because the notification was expanded and the old banner did not fully fit.
- New notifications are immediately hidden if the user mouses away from them.
- If a new notification is updated while it is shown, we extend the time it
will be shown.
- If a new notification is updated while it is hiding, we stop hiding it and
show it again.
- If a summary notification is updated while it is hiding, we let it finish
hiding and show a new notification with the updated information.
Implementation details:
- Single-line notifications now have 4px bottom padding instead of 8px, which
means that their height matches the tray height, they are fully shown in the
banner mode, and don't pop out by 4px when the notification is expanded.
- Notification keeps a flag that indicates whether it is expanded, updates
its expanded look when it is updated, and emits an 'expanded' signal
indicating that its layout has possibly changed. The message tray connects
to this 'expanded' signal when it is showing a notification in the expanded
state and updates the position of the notification accordingly when this
signal is received so that the notification is fully shown. This is better
than connecting to 'notify::height' signal on the notification bin, since
it results in fewer callbacks.
https://bugzilla.gnome.org/show_bug.cgi?id=617209
Expanding notifications automatically just because they popped up where
the pointer is positioned distracts the user. It can also lead to a behavior
that is surprising to the user by, for example, making the user's input
switch to the notification's text entry box.
It is possible to expand a notification that popped up over the pointer
by mousing away from it and then mousing back in immediately.
https://bugzilla.gnome.org/show_bug.cgi?id=617209
We used to keep long titles ellipsized when a notification was expanded,
which was a bug. We now show them fully by line wrapping them.
Based on the original patch from Steven Van Bael.
https://bugzilla.gnome.org/show_bug.cgi?id=623970
We used 'bannerBody' flag to differentiate the case when we move the banner to
the body when the notification is expanded from the one when we don't do that
and only use the custom content set for the notification, as is the case for
Telepathy notifications. We also always cleared the content of the notification
on update when bannerBody was set to true.
Flag named 'customContent' reflects the use case for it more clearly. The
comments that accompany it were also updated and improved.
We now always add the banner text as the first element in the expanded
notification unless 'customContent' flag is set to true.
If the 'body' parameter is specified, we use it in addition to the banner
text. The earlier version of the code had a bug that resulted in the 'body'
parameter not being set only in the case when the 'bannerBody' was set to
true and the banner text had newlines in it.
https://bugzilla.gnome.org/show_bug.cgi?id=623970
The banner should not be appearing briefly when we are hiding the notification.
For that, we should only restore the opacity of the banner in popInCompleted()
when we are done hiding the notification. We do need to restore the opacity
in case the notification is updated and is shown in the banner mode again.
The banner should not be appearing briefly when we are showing the notification
in the summary mode. For that, we should not use the animation time to fade out
the banner in popOut() for summary notifications.
These two problems were particularly visible when the ANIMATION_TIME was increased.
https://bugzilla.gnome.org/show_bug.cgi?id=623970
The old calculation did not take into account the icon and the spacing
between columns. This resulted in the notifications that had a slightly
longer title/banner combination than could actually fit not being expandable.
The new calculation is done in _bannerBoxAllocate() so
that we don't need to hardcode which other elements are present.
https://bugzilla.gnome.org/show_bug.cgi?id=627985
A Source needs exactly one summary icon (which in the case of a
trayicon-based source won't even be just an image), but possibly many
notification icons, which may vary for successive notifications
(particularly in the case of NotificationDaemon notifications). So
differentiate these cases in the API.
https://bugzilla.gnome.org/show_bug.cgi?id=627303
The tray itself does not actually need them, and to make status icon
sources work correctly the NotificationDaemon will need to be tracking
its sources by two separate IDs, so the existing system won't work.
Also remove MessageTray.removeSourceByApp(), which is
NotificationDaemon-specific, and implement the functionality in
notificationDaemon.js instead.
https://bugzilla.gnome.org/show_bug.cgi?id=627303
When calling Notification.update, reuse the previous _bannerBox and
related labels (only changing the label content and relayouting), so
that the opacity set on popOut is preserved. As a consequence, updating
an opened notification no longer shows (or flicker) the banner at the
top.
https://bugzilla.gnome.org/show_bug.cgi?id=625502
It is not obvious that only the icon is clickable to activate the
default action - in fact, with the area being that tiny, many don't
even know that notifications can be clicked.
Just extend the clickable area to the whole notification.
https://bugzilla.gnome.org/show_bug.cgi?id=613932
In addition to already grabbing focus in the summary notifications,
we also want to grab focus in the new notifications when the user
hovers over them and expands them.
The notifications that expand automatically will only get focus once
the user hovers over them. The notifications that don't expand will
never grab focus because they don't need it.
Make sure that we toggle the way we grab focus when switching between
the overview and the main mode. This is necessary because, unlike
summary notifications that pop down when the user moves between the two
modes, new notifications keep being shown as long as the user hovers
over them or until they time out.
https://bugzilla.gnome.org/show_bug.cgi?id=617224
Because clicking on the summary item to have it display its notification
is a more deliberate action than hovering, we can now grab focus in that
notification. This makes chat notifications in the summary more convenient
to use because you don't need to click on the text entry there.
We pop down the notification when the user clicks anywhere outside of it,
triggers the overview, or the run dialog.
https://bugzilla.gnome.org/show_bug.cgi?id=617224
This ensures that the summary appears when we are showing a new
notification and switch to the overview at the same time.
Another effect of this patch is that the summary is shown if the
user moves the mouse to the bottom right corner while a notification
is being shown, which is ok.
We need to only connect to 'action-invoked' on notification once
when the notification is created. We were accumulating callbacks
otherwise, which resulted, for example, in the Rhythmbox skipping
through multiple tracks when the 'Next' button was hit.
Always be sure to destroy the notification when its source is
destroyed, which is the case when an action is invoked.
Note that in the future, we might not want to destroy the source
for some notifications when an action is invoked. For example,
it makes sense to keep Rhythmbox in the tray while the music is
playing and allow the user to use the controls from the summary
notification too.
This is part of the design update for the message tray.
Source now takes an extra argument called 'title'.
All expanded message tray items are same width, which is determined by
the width of the item with the longest title, up to MAX_SOURCE_TITLE_WIDTH.
This is done so that items don't move around too much when one is expanded
and another one is collapsed.
https://bugzilla.gnome.org/show_bug.cgi?id=617224
Currently we only relayout when the screen size changes, this gets
the cases where a monitor gets added/removed but not when the primary
monitor changes.
We need to relayout on all monitor layout changes.
Remove ShellGlobal::screen-size-changed signal as it is no longer used, Gdk is
used to track changes now.
A ShellGlobal::gdk-screen property is added for this purpose.
https://bugzilla.gnome.org/show_bug.cgi?id=620377
There are some places in the code where we use both fixed positioning
and CSS. Currently we use either a combination of ClutterGroup and StBin,
or we uses StBoxLayout with fixed positioning. Replace those with the new
StGroup container.
https://bugzilla.gnome.org/show_bug.cgi?id=613907
This is our convention.
The only exceptions are double quotes for words in comments that give
them a special meaning (though beware that these quotes are not truly
necessary most of the time) and double quotes that need to be a part
of the output string.
Previously we used a ClutterGroup containing a second ClutterGroup for
the non-visibleInOverview actors. Redo it using a single
ShellGenericContainer, and use set_skip_paint() to hide the
non-overview chrome when the overview is visible.
Also fix up the default values for trackActor().
https://bugzilla.gnome.org/show_bug.cgi?id=608667
If a notification is about to hide, but the user has moved the mouse
towards it, let it stick around for another second (and so on, until
the mouse either reaches the tray and causes it to be pinned, or stops
moving the mouse toward it).
https://bugzilla.gnome.org/show_bug.cgi?id=610071
Figure out if the banner is too long to fit as soon as the
notification's style is set, rather than waiting until allocation
time, since it's bad to add new table rows during allocation.
https://bugzilla.gnome.org/show_bug.cgi?id=611612
When the notificaionBin has an odd width this could result into
loosing pixel aligment (and ugly looking font).
As the notification is already reactive make it non reactive and
remove the use of garvity.
https://bugzilla.gnome.org/show_bug.cgi?id=614702
Also reorganizes the notification layout to use an StScrollView; very
tall notifications are now scrolled instead of just taking up more and
more of the screen.
https://bugzilla.gnome.org/show_bug.cgi?id=608999
Rather than having the notificationBin, summaryBin, and
summaryNotificationBin span the whole width of the screen and just
align their children to the right spot, set their anchor_gravity
appropriately, set their anchor point correctly, and let their width
vary with the width of their child.
Fixes the fact that the area to the left and right of an expanded
notification was reactive, because the notificationBin was invisibly
covering it.
https://bugzilla.gnome.org/show_bug.cgi?id=612072
St.Widget's new "hover" property takes reactive children into account
when deciding whether or not the pointer has actually left the actor,
so it works better than the code that used to be here.
https://bugzilla.gnome.org/show_bug.cgi?id=610726
