This lets it cooperate with other gestures like tap.
The way I implemented this was to refactor the entire Draggable gesture
logic to use a new kind of gesture detector called
MultiDragGestureRecognizer. It works a bit like
MultiTapGestureRecognizer but for drags.
Also some tweaks to the velocity estimator.
Each layer is supposed to reexport the parts of the previous layer
that are part of its API.
- In painting.dart, export from dart:ui all the Canvas-related APIs
that make sense to be used at higher levels, e.g. PaintingStyle.
- Delete painting/shadows.dart. It was dead code.
- In rendering/object.dart, export all of painting.dart.
- In widgets/basic.dart, export all of painting.dart and
animation.dart. Some classes in animation/ are renamed to make this
less disruptive and confusing to the namespace.
- Split out Stocks back into an import model rather than a part model,
so that it's easier to manage its dependencies on a per-file basis.
- Move Ticker to scheduler library.
- Remove as many redundant imports as possible now.
- Some minor nit picking cleanup in various files.
The asserting will continue until morale improves!
* Convert all assert(*.isNormalized) checks to use the new
debugAssertIsNormalized technology.
* Convert CustomMultiChildLayout to use the new RenderingError
technology to greatly improve the detail in errors you get when
writing CustomMultiChildLayout delegates.
* Add BoxConstraints.copyWith().
* Indent the descendants in the rendering exception data dump so that
when you have multiple children it's clearer what's going on.
Negative constraints never make sense, so catch those too.
Make RenderObject.layout's isNormalized assert use the newer more fancy
debug version of isNormalized.
This provides a fast way to iterate on changes to a Flutter app that only
involve updates to Dart code and do not require a full build and install
of the FLX and APK
Gallery Demos: button, dialog, snack bar
Added button, dialog, and snack bar gallery demos.
Split gallery main.dart into files in the lib/gallery subdirectory.
Enable TabBarSelectionState to deal with the PageStorage saved selected value no longer equalling any value.
Changed the color of Dialog text to match the theme's caption color.
Also: uppercased tab labels per #1617
