This CL also refactors how animations work, particularly for the Drawer. I've
renamed DrawerAnimation to DrawerController and switched it from being an
Animation to having an Animation. I've also renamed Animation to AnimatedValue
to capture the idea that the class actually presents the value being animated.
Finally, I've factored AnimatedValueListener out of Drawer so that it can be
used by PopupMenuItem as well.
Finally, I've added a scheduleBuild convienence function to Component instead
of having to call setState(() {}), which has come up a couple times.
R=eseidel@chromium.org
Review URL: https://codereview.chromium.org/1016093002
This CL makes the drawer the correct size and use the correct animation curve.
Also, remove the hard-coded z-index values now that hit testing works again.
This CL adjusts the mask's opacity to match the drawer in Gmail.
R=eseidel@chromium.org
Review URL: https://codereview.chromium.org/1012463003
Previously, we had a problem with this physics simulation not actually hitting
the edge of the box and causing the scrollable contents to fall back down. To
avoid that problem, we enforced a minimum velocity for the particle to ensure
that it always hit the edge of the box. However, when that min velocity kicked
in, the results were visually unappealing.
This CL fixes the underlying problem. The fix is to apply the impluse from
gravity after updating the particle's position. In that way, we slightly over
estimate the particle's position in every step of the simulation, ensuring that
we don't miss the edge of the box due to errors in our simulation. With this
change, we no longer need the min velocity hack.
R=eseidel@chromium.org
Review URL: https://codereview.chromium.org/1008423002
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
This CL uses a simple physics simulation to drive overscroll animations.
We model settling the overscroll as a particle climbing a hill, which
gives us a pleasing parabolic trajectory.
This CL also includes machinery for spring-based simulations. We'll use
these to drive the drawer animation.
R=eseidel@chromium.org
Review URL: https://codereview.chromium.org/999423004
This CL teaches Scrollable how to settle back to a scroll offset of 0.0 after a
fling or a scroll. There's still some room for improvement:
1) Some of this logic should be factored out into the scroll curve object.
2) We don't produce the correct animation curves when we fling into the
overscroll region because we wait for the fling velocity to reach zero
before we start the settling animation.
R=ojan@chromium.org, eseidel@chromium.org
Review URL: https://codereview.chromium.org/1005753002
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
This patch allows for an initial delay before an animation begins and also adds an Animation class which encapsulates a value which is long-lived, can be explicitly set and also animated from its current value to another value.
BUG=
R=abarth@chromium.org
Review URL: https://codereview.chromium.org/994143002
- Removed out-of-date README.md
- Moved fling-curve into the animation directory because it's part of the
animation behavior of the system.
- Moved view-configuration into the theme directory because it's a collection
of constants similar in flavor to the colors and the shadows. Eventually
we'll want to make the theme configurable and have these all together will
hopefully make that easier.
- Moved dom-serializer into tests/resources because it is used only by tests.
R=eseidel@chromium.org
Review URL: https://codereview.chromium.org/980423002
