* Allow mouse hover to only respond to some mouse events but not all.

Adds a paint after detaching/attaching hover annotations to keep the annotation layers in sync with the annotations attached to the mouse detector.

Fixes #30744

This reverts commit a8211369.

* Remove pressure from PointerHoverEvent ctor

* Correctly synthesise buttons, and add tests

* Add constants `kPrimaryButton`, `kTouchContact` and `kStylusContact`
* PointerDownEvent and PointerMoveEvent will always set the 0x01 bit on buttons

* Fix: ui.PointerChange.remove might contain position change, but we used to expand it into a Cancel and Remove, neither of which allows position change. A Hover event is added, and a test is updated accordingly.
* Fixed the issue where a PointerMoveEvent and a PointerCancelEvent do not receive the correct pressure.
* Refactor the calculation of delta into deltaTo.

Refactors the logic of TapGestureRecognizer, making the calling dependency unidirectional between resolve(accept) and checkUp.

Avoids an implicit downcast + crash in MouseTracker, since the last
pointer event can be a Move or Down event, in addition to Hover.

* some space formattings

* always use blocks in if-else if a block is used

* format spaces in for and while

* allow multiline if conditions

* fix missing space

* Fix MouseTracker annotation leak

Map's remove method is typed `remove(Object key)`, which can cause bugs.

Modified the existing test to check if the annotation has been removed
from MouseTracker.

Adds support for discrete scroll events, such as those sent by a scroll wheel.

Includes the plumbing to convert, dispatch, and handle these events, as well as
Scrollable support for consuming them.

* First impl with StopwatchWithZone

* Clean up params and name

* Remove outdated TODO

* Fix style

* Fix a missing param. Add @require

* Fix import meta

* Fix code style

* Add missing require. Fix comment style.

* Fix code style

* Fix code style

* add trailing commas on list/map/parameters

* add trailing commas on Invocation with nb of arg>1

* add commas for widget containing widgets

* add trailing commas if instantiation contains trailing comma

* revert bad change

Breaks the moveBy call from drag and dragFrom into two separate calls and changes the default behavior of DragStartBehavior to DragStartBehavior.start (#26438)

* Breaking change which sets the default DragStartBehavior to DragStartBehavior.start and changes WidgetTester.drag and WidgetTester.dragFrom by breaking the moveBy function call into multiple pieces.

Rather than building a description string by hand, use Diagnosticable
properties. Simplifies output, since many fields have uninteresting
default values in many cases, and makes it easier to add more loggable
properties in subclasses.

Issue #28014

* Fix for nan pressure values and values outside min and max pressure ranges

This implements support for hovering mouse pointers, so that mice connected to Android devices, and ChromeOS devices running Android apps will work properly.

It teaches flutter_test about hover events, which required changing how they are created and used.

Also modifies AnnotatedRegion to allow a region that can be located someplace other than just the origin.

Along with tests for all of the above.

Fixes #5504

* fix some bad indentations

* remove suspicious line

* Fixes Android keyboard bug

* the onStart callback will report the location of the pointer where it wins the gesture arena by default instead of the pointer down location. Fixes all tests related to changing this default value.

This reverts commit 08538f91.

* Adds start behavior option to the drag gesture recognizer and makes it the default option when a drag gesture recognizer is created. Also fixes all the tests to work correctly with the new default behavior.

* adds Force Press gesture detector and recognizer