- make the ScrollBehavior instance long-lived, rather than recreating
it each time we update the list contents.
- have OverscrollBehavior track the total height of the contents and
the height of the scrollable region, so that it can determine when
to stop scrolling down.
- teach OverscrollBehavior about how to determine when to stop
scrolling down, and how to bounce when it's too far down.
- replace the 'energy' concept in Particles with a method that sets
the energy and direction at the same time, instead of assuming that
the direction is always positive when setting energy.
- make FixedHeightScrollable lists track the number of items in the
list and have them update their ScrollBehavior regarding this
information as it changes.
- track how many items are currently showing in the list stock list.
R=eseidel@chromium.org
Review URL: https://codereview.chromium.org/1097373002
Instead of hard-coding the stock data in the Dart file, this CL moves the data
to a JSON file and loads that file over the network. This change improves load
time for the Stocks app from 3 seconds to 2 seconds.
Also, this CL removes shake-to-reload from the Stocks app because that also
slows down load time (due to the two module systems fighting each other).
R=rafaelw@chromium.org, ojan@chromium.org
Review URL: https://codereview.chromium.org/1021723005
This patch adds a new (non-Render) StyleNode which takes two arguments: A (content) node, which it wraps and a Style object.
This allows for styles to be applied to Nodes which are constructed elsewhere (e.g. passed in as arguments).
R=abarth@chromium.org
Review URL: https://codereview.chromium.org/1027653002
This patch adds a base AnimatedComponent from which most components that animated should derive. It takes care of listening & unlistening from the animations during did(Un)mount as well as binding the animated value to a private field and scheduling the component for build.
Note that this patch removes the did(Un)mount overridable methods from Component and replaces them with a callback mechanism which is less brittle.
BUG=
R=abarth@chromium.org
Review URL: https://codereview.chromium.org/1027633003
This patch removes the mutable API to event handling (Nodes no longer have a events object with which to add listeners).
Instead, a new (non-Render) Node is introduced: EventTarget. This node represents a location in the Effen tree which can handle events as they bubble.
Note that this also changes the implementation to use event delegation (one set of listeners at the sky.document level) rather than direct listeners on leaf nodes.
R=abarth@chromium.org
Review URL: https://codereview.chromium.org/1019633004
This CL cleans up the sky/framework/animation as follows:
1) I've moved code that's used only by the custom elements framework into
sky/framework/elements/animation. This code is based on AnimationDelegates
rather than Streams.
2) Rename ScrollCurve to ScrollBehavior because it encapsulates more behavior
than just a curve.
3) Make the Generator interface explicit and mark subclasses as actual
subclasses.
4) Move Simulation into generators.dart because it implements the Generator
interface.
5) Move Animation out of generators.dart because it does not implement the
Generator interface.
R=eseidel@chromium.org
Review URL: https://codereview.chromium.org/1001373002
When using OverscrollCurve, we continue to scroll beyond the top of the
scrollable area but the scroll delta is reduced by 2x. A future CL will add an
animation at gesturescrollend to relax back to scroll position 0.0.
R=eseidel@chromium.org
Review URL: https://codereview.chromium.org/1002953003
Intead of hard-coding the notion of bounded scrolling into Scrollable, this CL
factors out a ScrollCurve class that applies the bounds. In the future, we'll
refine this mechanism to implement overflow scrolling.
R=eseidel@chromium.org
Review URL: https://codereview.chromium.org/1005633002
To accomplish this, I made the following changes:
1) Material is now in charge of drawing the material shadows.
2) In order to mix in the style for the shadow, Element now takes a list of
Styles instead of a single style.
3) Update all clients of Element#style to understand that we now have a list.
4) Update components that drawer shadows to have Material do that work instead.
a) One exception: FloatingActionButton draws its own shadow because of its
crazy clip requirements. We'll probably want to find a better way for
FloatingActionButton to clip in the future.
I've also added a widgets-fn example to demo the fn material widgets.
This CL introduces a bug into Drawer whereby you can get ink splashes
everywhere in the drawer. In the future, we'll need to separate out the
different material aspects to get non-splashable materials.
R=rafaelw@chromium.org
Review URL: https://codereview.chromium.org/1003553002
