Move the back button and drawer opening logic into the app bar.
Move the tap-status-bar-to-scroll-to-top logic to using
ScrollControllers. Provide a PrimaryScrollController and a `primary`
flag on scroll views.
Make it possible to track when a route becomes or stops being poppable.
This reverts commit ea21d0c542d05a7738a8357db48fe9490c25c621 which
didn't resolve the pagination control overflow issue. Commit
7425940d5be153430f98aa5b0735545f4a4fc3e5 replaces this as an alternate
workaround. Once flutter/flutter#7980 is resolved, we should revert
7425940d5be153430f98aa5b0735545f4a4fc3e5 and scroll instead.
Once engine commit d49a6b110bced49fa318b0dd45bf409218df9ee5 rolls into
Flutter rolls in, we get correct font metrics for the Ahem font, used in
headless sky_shell test runs. Ahem has much wider glyphs than the system
font, which causes the PaginatedDataTable bottom bar to be much wider
and overflow the previous and next controls offscreen.
This commit reduces the number of rows such that the prev/next controls
are still just barely onscreen.
This patch improves PageView to the point where we can use it in the date
picker. Specifically, you now get onPageChanged notifications and you can
control which page is visible using a PageController.
Also, move the creation of the ScrollPosition to ScrollController.
Finally, remove TestScrollable in favor of CustomScrollView, which is the
production version of this widget.
If you pass a ScrollController to a Scrollable2, you can use the controller to
read and write the scroll offset without having to find the Scrollable2State
object.
* Small Flutter strong mode cleanup fixes.
These are cases where strong mode down cast composite errors
generally indicated cases that would performance or correctness
issues if Flutter code was run in a strong mode VM.
* Fix Command API so that it is always in terms of Map<String,String>.
* Fix typedef
This patch converts the Shrine home page to using a sliver-based grid.
This required using a CustomScrollView to mix the block at the top with
the grid below.
We now create a GridLayout object that memoizes the layout information
for a given SliverConstraints. This approach is both more efficient
(because the delegate no longer needs to re-solve its layout for each
child) and allows for more code sharing between delegates.
The SliverGridRegularTileLayout will also be useful for the date
picker.
Also, document the grid delegates.
This patch moves the resonsibility for wrapping repaint boundaries
around children to SliverChildDelegate, which means delegates can choose
whether or no to use repaint boundaries.
Also introduce SliverChildBuilderDelegate to make it easier to use the
builder pattern with sliver lists.
This functionality will be used by date picker, which wants to use a
SliverGrid but doesn't need a repaint boundary around every day in a
month grid.
* allow mulitple observers for Navigator and MaterialApp
* add test for the navigator observers
* fix style
* add test for adding/removing a navigator observer
