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65 行
2.5 KiB
65 行
2.5 KiB
using Unity.UIWidgets.foundation;
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using Unity.UIWidgets.widgets;
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using System;
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using System.Collections.Generic;
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namespace Unity.UIWidgets.cupertino {
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public enum CupertinoUserInterfaceLevelData {
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baselayer,
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elevatedlayer,
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}
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public class CupertinoUserInterfaceLevel : InheritedWidget {
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public CupertinoUserInterfaceLevel(
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Key key = null,
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CupertinoUserInterfaceLevelData data = default,
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Widget child = null
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) : base(key: key, child: child)
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{
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D.assert(data != null);
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_data = data;
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}
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public CupertinoUserInterfaceLevelData _data;
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public static CupertinoUserInterfaceLevelData? of(BuildContext context, bool nullOk = false ) {
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D.assert(context != null);
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D.assert(nullOk != null);
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CupertinoUserInterfaceLevel query = context.dependOnInheritedWidgetOfExactType<CupertinoUserInterfaceLevel>(null);
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if (query != null)
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return query._data;
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//if (nullOk)
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// return ;
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throw new UIWidgetsError(
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"CupertinoUserInterfaceLevel.of() called with a context that does not contain a CupertinoUserInterfaceLevel.\n" +
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"No CupertinoUserInterfaceLevel ancestor could be found starting from the context that was passed "+
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"to CupertinoUserInterfaceLevel.of(). This can happen because you do not have a WidgetsApp or "+
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"MaterialApp widget (those widgets introduce a CupertinoUserInterfaceLevel), or it can happen "+
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"if the context you use comes from a widget above those widgets.\n"+
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"The context used was:\n"+
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context.ToString()
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);
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}
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public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
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base.debugFillProperties(properties);
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properties.add(new EnumProperty<CupertinoUserInterfaceLevelData>("user interface level", _data));
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}
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public override bool updateShouldNotify(InheritedWidget oldWidget) {
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//throw new System.NotImplementedException();
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//oldWidget._data != _data;
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/// ?????
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if (oldWidget.GetType() == typeof(CupertinoUserInterfaceLevel)) {
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return updateShouldNotify(oldWidget);
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}
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return false;
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}
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public bool updateShouldNotify(CupertinoUserInterfaceLevel oldWidget) => oldWidget._data != _data;
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}
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}
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