Support PointerDeviceKind other than touch

[dickermoshe]

Love this package, thanks so much for it!

I develop mobile app using Device Preview. It's much easier that dealing with android/ios emulators.

However, scroll on these devices uses the scroll wheel, not touch, so I use a ScrollConfiguration widget to add touch support

const MaterialScrollBehavior().copyWith(
  dragDevices: {
    PointerDeviceKind.touch,
    PointerDeviceKind.mouse
})

However SheetDraggable still wasn't working! But then I found this

smooth_sheets/lib/src/draggable/sheet_draggable.dart

Lines 84 to 98 in 1166df3

	Widget build(BuildContext context) {
	return RawGestureDetector(
	gestures: {
	VerticalDragGestureRecognizer:
	GestureRecognizerFactoryWithHandlers<VerticalDragGestureRecognizer>(
	() => VerticalDragGestureRecognizer(
	debugOwner: kDebugMode ? runtimeType : null,
	supportedDevices: const {PointerDeviceKind.touch},
	),
	(instance) => instance
	..onStart = _handleDragStart
	..onUpdate = _handleDragUpdate
	..onEnd = _handleDragEnd
	..onCancel = _handleDragCancel,
	),

@fujidaiti Why is this hardcoded to touch devices only?

[fujidaiti]

Hi @dickermoshe,

Why is this hardcoded to touch devices only?

To be honest, I hadn’t given much thought to the desktop platforms as the package was originally intended for mobile.
But it seems like it would be a good idea to reconsider.

[dickermoshe]

Is there a reason we couldn't just replace that with?

VerticalDragGestureRecognizer(
  debugOwner: kDebugMode ? runtimeType : null,
  supportedDevices: ScrollConfiguration.of(context).dragDevices,
)

[dickermoshe]

To support mouse wheels your gonna need to use a Listener
The code int SingleChildScrollView should help you

[fujidaiti]

To support mouse wheels your gonna need to use a Listener
The code int SingleChildScrollView should help you

It is difficult to support mouse wheels as it is incompatible with the momentum scrolling and the snapping effects of sheets. See this comment for more details.

Flutter treats mouse wheel scrolling as a series of tiny scrolls (onPointerDown → onPointerMove → onPointerUp → onPointerDown → onPointerMove → ...), which prevents momentum scrolling from working properly. This is particularly incompatible with the snapping effects.

[dickermoshe]

Hmmm, that's disappointing.
Thanks Again