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58 行
2.0 KiB

using Unity.UIWidgets.foundation;
using Unity.UIWidgets.painting;
namespace Unity.UIWidgets.widgets {
public class ScrollBehavior {
public Widget buildViewportChrome(BuildContext context, Widget child, AxisDirection axisDirection) {
return child;
}
public ScrollPhysics getScrollPhysics(BuildContext context) {
return new BouncingScrollPhysics();
}
public virtual bool shouldNotify(ScrollBehavior oldDelegate) {
return false;
}
public override string ToString() {
return this.GetType().ToString();
}
}
public class ScrollConfiguration : InheritedWidget {
public ScrollConfiguration(
Key key = null,
ScrollBehavior behavior = null,
Widget child = null
) : base(key: key, child: child) {
D.assert(behavior != null);
this.behavior = behavior;
}
public readonly ScrollBehavior behavior;
public static ScrollBehavior of(BuildContext context) {
ScrollConfiguration configuration =
(ScrollConfiguration) context.inheritFromWidgetOfExactType(typeof(ScrollConfiguration));
if (configuration != null) {
return configuration.behavior;
}
return new ScrollBehavior();
}
public override bool updateShouldNotify(InheritedWidget oldWidgetRaw) {
var oldWidget = (ScrollConfiguration) oldWidgetRaw;
D.assert(this.behavior != null);
return this.behavior.GetType() != oldWidget.behavior.GetType()
|| this.behavior != oldWidget.behavior && this.behavior.shouldNotify(oldWidget.behavior);
}
public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
base.debugFillProperties(properties);
properties.add(new DiagnosticsProperty<ScrollBehavior>("behavior", this.behavior));
}
}
}