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Clean up mouse region code (#96636)

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* Clean up mouse region code

* remove even more code
This commit is contained in:
chunhtai 2022-01-18 13:25:32 -08:00 committed by GitHub
parent f12c83ea3e
commit 0d221dc22e
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 21 additions and 53 deletions
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74
packages/flutter/lib/src/widgets/basic.dart
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@ -6185,7 +6185,7 @@ class Listener extends SingleChildRenderObjectWidget {
///
/// * [Listener], a similar widget that tracks pointer events when the pointer
/// has buttons pressed.
class MouseRegion extends StatefulWidget {
class MouseRegion extends SingleChildRenderObjectWidget {
/// Creates a widget that forwards mouse events to callbacks.
///
/// By default, all callbacks are empty, [cursor] is [MouseCursor.defer], and
@ -6197,10 +6197,10 @@ class MouseRegion extends StatefulWidget {
this.onHover,
this.cursor = MouseCursor.defer,
this.opaque = true,
this.child,
Widget? child,
}) : assert(cursor != null),
assert(opaque != null),
super(key: key);
super(key: key, child: child);
/// Triggered when a mouse pointer has entered this widget.
///
@ -6347,13 +6347,26 @@ class MouseRegion extends StatefulWidget {
/// This defaults to true.
final bool opaque;
/// The widget below this widget in the tree.
///
/// {@macro flutter.widgets.ProxyWidget.child}
final Widget? child;
@override
RenderMouseRegion createRenderObject(BuildContext context) {
return RenderMouseRegion(
onEnter: onEnter,
onHover: onHover,
onExit: onExit,
cursor: cursor,
opaque: opaque,
);
}
@override
State<MouseRegion> createState() => _MouseRegionState();
void updateRenderObject(BuildContext context, RenderMouseRegion renderObject) {
renderObject
..onEnter = onEnter
..onHover = onHover
..onExit = onExit
..cursor = cursor
..opaque = opaque;
}
@override
void debugFillProperties(DiagnosticPropertiesBuilder properties) {
@ -6371,51 +6384,6 @@ class MouseRegion extends StatefulWidget {
}
}
class _MouseRegionState extends State<MouseRegion> {
void handleExit(PointerExitEvent event) {
if (widget.onExit != null && mounted)
widget.onExit!(event);
}
PointerExitEventListener? getHandleExit() {
return widget.onExit == null ? null : handleExit;
}
@override
Widget build(BuildContext context) {
return _RawMouseRegion(this);
}
}
class _RawMouseRegion extends SingleChildRenderObjectWidget {
_RawMouseRegion(this.owner) : super(child: owner.widget.child);
final _MouseRegionState owner;
@override
RenderMouseRegion createRenderObject(BuildContext context) {
final MouseRegion widget = owner.widget;
return RenderMouseRegion(
onEnter: widget.onEnter,
onHover: widget.onHover,
onExit: owner.getHandleExit(),
cursor: widget.cursor,
opaque: widget.opaque,
);
}
@override
void updateRenderObject(BuildContext context, RenderMouseRegion renderObject) {
final MouseRegion widget = owner.widget;
renderObject
..onEnter = widget.onEnter
..onHover = widget.onHover
..onExit = owner.getHandleExit()
..cursor = widget.cursor
..opaque = widget.opaque;
}
}
/// A widget that creates a separate display list for its child.
///
/// This widget creates a separate display list for its child, which