using System.Collections.Generic; using System.Linq; using Unity.UIWidgets.foundation; using Unity.UIWidgets.gestures; using Unity.UIWidgets.material; using Unity.UIWidgets.painting; using Unity.UIWidgets.rendering; using Unity.UIWidgets.ui; using Unity.UIWidgets.widgets; using UnityEngine; using Canvas = Unity.UIWidgets.ui.Canvas; using Color = Unity.UIWidgets.ui.Color; using Material = Unity.UIWidgets.material.Material; using Rect = Unity.UIWidgets.ui.Rect; namespace UIWidgetsGallery.gallery { public class BottomAppBarDemo : StatefulWidget { public const string routeName = "/material/bottom_app_bar"; public override State createState() { return new _BottomAppBarDemoState(); } } class _BottomAppBarDemoState : State { static readonly GlobalKey _scaffoldKey = GlobalKey.key(); static readonly _ChoiceValue kNoFab = new _ChoiceValue( title: "None", label: "do not show a floating action button", value: null ); static readonly _ChoiceValue kCircularFab = new _ChoiceValue( title: "Circular", label: "circular floating action button", value: new FloatingActionButton( onPressed: _showSnackbar, child: new Icon(Icons.add), backgroundColor: Colors.orange ) ); static readonly _ChoiceValue kDiamondFab = new _ChoiceValue( title: "Diamond", label: "diamond shape floating action button", value: new _DiamondFab( onPressed: _showSnackbar, child: new Icon(Icons.add) ) ); static readonly _ChoiceValue kShowNotchTrue = new _ChoiceValue( title: "On", label: "show bottom appbar notch", value: true ); static readonly _ChoiceValue kShowNotchFalse = new _ChoiceValue( title: "Off", label: "do not show bottom appbar notch", value: false ); static readonly _ChoiceValue kFabEndDocked = new _ChoiceValue( title: "Attached - End", label: "floating action button is docked at the end of the bottom app bar", value: FloatingActionButtonLocation.endDocked ); static readonly _ChoiceValue kFabCenterDocked = new _ChoiceValue( title: "Attached - Center", label: "floating action button is docked at the center of the bottom app bar", value: FloatingActionButtonLocation.centerDocked ); static readonly _ChoiceValue kFabEndFloat = new _ChoiceValue( title: "Free - End", label: "floating action button floats above the end of the bottom app bar", value: FloatingActionButtonLocation.endFloat ); static readonly _ChoiceValue kFabCenterFloat = new _ChoiceValue( title: "Free - Center", label: "floating action button is floats above the center of the bottom app bar", value: FloatingActionButtonLocation.centerFloat ); static void _showSnackbar() { const string text = "When the Scaffold's floating action button location changes, " + "the floating action button animates to its new position." + "The BottomAppBar adapts its shape appropriately."; _scaffoldKey.currentState.showSnackBar( new SnackBar(content: new Text(text)) ); } static readonly List<_NamedColor> kBabColors = new List<_NamedColor> { new _NamedColor(null, "Clear"), new _NamedColor(new Color(0xFFFFC100), "Orange"), new _NamedColor(new Color(0xFF91FAFF), "Light Blue"), new _NamedColor(new Color(0xFF00D1FF), "Cyan"), new _NamedColor(new Color(0xFF00BCFF), "Cerulean"), new _NamedColor(new Color(0xFF009BEE), "Blue") }; _ChoiceValue _fabShape = kCircularFab; _ChoiceValue _showNotch = kShowNotchTrue; _ChoiceValue _fabLocation = kFabEndDocked; Color _babColor = kBabColors.First().color; void _onShowNotchChanged(_ChoiceValue value) { this.setState(() => { this._showNotch = value; }); } void _onFabShapeChanged(_ChoiceValue value) { this.setState(() => { this._fabShape = value; }); } void _onFabLocationChanged(_ChoiceValue value) { this.setState(() => { this._fabLocation = value; }); } void _onBabColorChanged(Color value) { this.setState(() => { this._babColor = value; }); } public override Widget build(BuildContext context) { return new Scaffold( key: _scaffoldKey, appBar: new AppBar( title: new Text("Bottom app bar"), elevation: 0.0f, actions: new List { new MaterialDemoDocumentationButton(BottomAppBarDemo.routeName), new IconButton( icon: new Icon(Icons.sentiment_very_satisfied), onPressed: () => { this.setState(() => { this._fabShape = this._fabShape == kCircularFab ? kDiamondFab : kCircularFab; }); } ) } ), body: new ListView( padding: EdgeInsets.only(bottom: 88.0f), children: new List { new _AppBarDemoHeading("FAB Shape"), new _RadioItem(kCircularFab, this._fabShape, this._onFabShapeChanged), new _RadioItem(kDiamondFab, this._fabShape, this._onFabShapeChanged), new _RadioItem(kNoFab, this._fabShape, this._onFabShapeChanged), new Divider(), new _AppBarDemoHeading("Notch"), new _RadioItem(kShowNotchTrue, this._showNotch, this._onShowNotchChanged), new _RadioItem(kShowNotchFalse, this._showNotch, this._onShowNotchChanged), new Divider(), new _AppBarDemoHeading("FAB Position"), new _RadioItem(kFabEndDocked, this._fabLocation, this._onFabLocationChanged), new _RadioItem(kFabCenterDocked, this._fabLocation, this._onFabLocationChanged), new _RadioItem(kFabEndFloat, this._fabLocation, this._onFabLocationChanged), new _RadioItem(kFabCenterFloat, this._fabLocation, this._onFabLocationChanged), new Divider(), new _AppBarDemoHeading("App bar color"), new _ColorsItem(kBabColors, this._babColor, this._onBabColorChanged) } ), floatingActionButton: this._fabShape.value, floatingActionButtonLocation: this._fabLocation.value, bottomNavigationBar: new _DemoBottomAppBar( color: this._babColor, fabLocation: this._fabLocation.value, shape: this._selectNotch() ) ); } NotchedShape _selectNotch() { if (!this._showNotch.value) { return null; } if (this._fabShape == kCircularFab) { return new CircularNotchedRectangle(); } if (this._fabShape == kDiamondFab) { return new _DiamondNotchedRectangle(); } return null; } } class _ChoiceValue { public _ChoiceValue(T value, string title, string label) { this.value = value; this.title = title; this.label = label; } public readonly T value; public readonly string title; string label; // For the Semantics widget that contains title public override string ToString() { return $"{this.GetType()}('{this.title}')"; } } class _RadioItem : StatelessWidget { public _RadioItem(_ChoiceValue value, _ChoiceValue groupValue, ValueChanged<_ChoiceValue> onChanged) { this.value = value; this.groupValue = groupValue; this.onChanged = onChanged; } _ChoiceValue value; _ChoiceValue groupValue; ValueChanged<_ChoiceValue> onChanged; public override Widget build(BuildContext context) { ThemeData theme = Theme.of(context); return new Container( height: 56.0f, padding: EdgeInsets.only(left: 16.0f), alignment: Alignment.centerLeft, child: new Row( children: new List { new Radio<_ChoiceValue>( value: this.value, groupValue: this.groupValue, onChanged: this.onChanged ), new Expanded( child: new GestureDetector( behavior: HitTestBehavior.opaque, onTap: () => { this.onChanged(this.value); }, child: new Text(this.value.title, style: theme.textTheme.subhead ) ) ) } ) ); } } class _NamedColor { public _NamedColor(Color color, string name) { this.color = color; this.name = name; } public readonly Color color; public readonly string name; } class _ColorsItem : StatelessWidget { public _ColorsItem(List<_NamedColor> colors, Color selectedColor, ValueChanged onChanged) { this.colors = colors; this.selectedColor = selectedColor; this.onChanged = onChanged; } List<_NamedColor> colors; public readonly Color selectedColor; ValueChanged onChanged; public override Widget build(BuildContext context) { return new Row( mainAxisAlignment: MainAxisAlignment.spaceEvenly, children: this.colors.Select<_NamedColor, Widget>((_NamedColor namedColor) => { return new RawMaterialButton( onPressed: () => { this.onChanged(namedColor.color); }, constraints: BoxConstraints.tightFor( width: 32.0f, height: 32.0f ), fillColor: namedColor.color, shape: new CircleBorder( side: new BorderSide( color: namedColor.color == this.selectedColor ? Colors.black : new Color(0xFFD5D7DA), width: 2.0f ) ) ); }).ToList() ); } } class _AppBarDemoHeading : StatelessWidget { public _AppBarDemoHeading(string text) { this.text = text; } public readonly string text; public override Widget build(BuildContext context) { ThemeData theme = Theme.of(context); return new Container( height: 48.0f, padding: EdgeInsets.only(left: 56.0f), alignment: Alignment.centerLeft, child: new Text(this.text, style: theme.textTheme.body1.copyWith( color: theme.primaryColor ) ) ); } } class _DemoBottomAppBar : StatelessWidget { public _DemoBottomAppBar( Color color = null, FloatingActionButtonLocation fabLocation = null, NotchedShape shape = null ) { this.color = color; this.fabLocation = fabLocation; this.shape = shape; } public readonly Color color; public readonly FloatingActionButtonLocation fabLocation; public readonly NotchedShape shape; static readonly List kCenterLocations = new List { FloatingActionButtonLocation.centerDocked, FloatingActionButtonLocation.centerFloat }; public override Widget build(BuildContext context) { List rowContents = new List { new IconButton( icon: new Icon(Icons.menu), onPressed: () => { BottomSheetUtils.showModalBottomSheet( context: context, builder: (BuildContext _context) => new _DemoDrawer() ); } ) }; if (kCenterLocations.Contains(this.fabLocation)) { rowContents.Add( new Expanded(child: new SizedBox()) ); } rowContents.AddRange(new List { new IconButton( icon: new Icon(Icons.search), onPressed: () => { Scaffold.of(context).showSnackBar( new SnackBar(content: new Text("This is a dummy search action.")) ); } ), new IconButton( icon: new Icon( Theme.of(context).platform == RuntimePlatform.Android ? Icons.more_vert : Icons.more_horiz ), onPressed: () => { Scaffold.of(context).showSnackBar( new SnackBar(content: new Text("This is a dummy menu action.")) ); } ) }); return new BottomAppBar( color: this.color, child: new Row(children: rowContents), shape: this.shape ); } } class _DemoDrawer : StatelessWidget { public _DemoDrawer() { } public override Widget build(BuildContext context) { return new Drawer( child: new Column( children: new List { new ListTile( leading: new Icon(Icons.search), title: new Text("Search") ), new ListTile( leading: new Icon(Icons.threed_rotation), title: new Text("3D") ) } ) ); } } class _DiamondFab : StatelessWidget { public _DiamondFab( Widget child, VoidCallback onPressed ) { this.child = child; this.onPressed = onPressed; } public readonly Widget child; public readonly VoidCallback onPressed; public override Widget build(BuildContext context) { return new Material( shape: new _DiamondBorder(), color: Colors.orange, child: new InkWell( onTap: this.onPressed == null ? (GestureTapCallback) null : () => { this.onPressed(); }, child: new Container( width: 56.0f, height: 56.0f, child: IconTheme.merge( data: new IconThemeData(color: Theme.of(context).accentIconTheme.color), child: this.child ) ) ), elevation: 6.0f ); } } class _DiamondNotchedRectangle : NotchedShape { public _DiamondNotchedRectangle() { } public override Path getOuterPath(Rect host, Rect guest) { if (!host.overlaps(guest)) { Path path = new Path(); path.addRect(host); return path; } D.assert(guest.width > 0.0f); Rect intersection = guest.intersect(host); float notchToCenter = intersection.height * (guest.height / 2.0f) / (guest.width / 2.0f); Path ret = new Path(); ret.moveTo(host.left, host.top); ret.lineTo(guest.center.dx - notchToCenter, host.top); ret.lineTo(guest.left + guest.width / 2.0f, guest.bottom); ret.lineTo(guest.center.dx + notchToCenter, host.top); ret.lineTo(host.right, host.top); ret.lineTo(host.right, host.bottom); ret.lineTo(host.left, host.bottom); ret.close(); return ret; } } class _DiamondBorder : ShapeBorder { public _DiamondBorder() { } public override EdgeInsets dimensions { get { return EdgeInsets.only(); } } public override Path getInnerPath(Rect rect) { return this.getOuterPath(rect); } public override Path getOuterPath(Rect rect) { Path path = new Path(); path.moveTo(rect.left + rect.width / 2.0f, rect.top); path.lineTo(rect.right, rect.top + rect.height / 2.0f); path.lineTo(rect.left + rect.width / 2.0f, rect.bottom); path.lineTo(rect.left, rect.top + rect.height / 2.0f); path.close(); return path; } public override void paint(Canvas canvas, Rect rect) { } public override ShapeBorder scale(float t) { return null; } } }