using System; using System.Collections.Generic; using Unity.UIWidgets.animation; using Unity.UIWidgets.async2; using Unity.UIWidgets.foundation; using Unity.UIWidgets.gestures; using Unity.UIWidgets.painting; using Unity.UIWidgets.rendering; using Unity.UIWidgets.ui; using Unity.UIWidgets.widgets; using UnityEngine; using Color = Unity.UIWidgets.ui.Color; using Rect = Unity.UIWidgets.ui.Rect; using TextStyle = Unity.UIWidgets.painting.TextStyle; namespace Unity.UIWidgets.material { public partial class material_ { internal static readonly TimeSpan _kMenuDuration = new TimeSpan(0, 0, 0, 0, 300); internal const float _kMenuCloseIntervalEnd = 2.0f / 3.0f; internal const float _kMenuHorizontalPadding = 16.0f; internal const float _kMenuDividerHeight = 16.0f; internal const float _kMenuMaxWidth = 5.0f * _kMenuWidthStep; internal const float _kMenuMinWidth = 2.0f * _kMenuWidthStep; internal const float _kMenuVerticalPadding = 8.0f; internal const float _kMenuWidthStep = 56.0f; internal const float _kMenuScreenPadding = 8.0f; } public abstract class PopupMenuEntry : StatefulWidget { protected PopupMenuEntry(Key key = null) : base(key: key) { } public abstract float height { get; } public abstract bool represents(T value); } public class PopupMenuDivider : PopupMenuEntry { public PopupMenuDivider(Key key = null, float height = material_._kMenuDividerHeight) : base(key: key) { _height = height; } readonly float _height; public override float height { get { return _height; } } public override bool represents(T value) { return false; } public override State createState() { return new _PopupMenuDividerState(); } } class _PopupMenuDividerState : State> { public override Widget build(BuildContext context) { return new Divider(height: widget.height); } } class _MenuItem : SingleChildRenderObjectWidget { internal _MenuItem( Key key = null, ValueChanged onLayout = null, Widget child = null ) : base(key: key, child: child) { Debug.Log(onLayout != null); this.onLayout = onLayout; } public readonly ValueChanged onLayout; public override RenderObject createRenderObject(BuildContext context) { return new _RenderMenuItemDuplicated(onLayout); } public override void updateRenderObject(BuildContext context, RenderObject renderObject) { if (renderObject is _RenderMenuItemDuplicated renderMenuItemDuplicated) { renderMenuItemDuplicated.onLayout = onLayout; } } } class _RenderMenuItemDuplicated : RenderShiftedBox { internal _RenderMenuItemDuplicated( ValueChanged onLayout, RenderBox child = null ) : base(child) { D.assert(onLayout != null); this.onLayout = onLayout; } public ValueChanged onLayout; protected override void performLayout() { if (child == null) { size = Size.zero; } else { child.layout(constraints, parentUsesSize: true); size = constraints.constrain(child.size); } BoxParentData childParentData = child.parentData as BoxParentData; childParentData.offset = Offset.zero; onLayout(size); } } public class PopupMenuItem : PopupMenuEntry { public PopupMenuItem( Key key = null, T value = default, bool enabled = true, float height = material_.kMinInteractiveDimension, TextStyle textStyle = null, Widget child = null ) : base(key: key) { this.value = value; this.enabled = enabled; _height = height; this.textStyle = textStyle; this.child = child; } public readonly T value; public readonly bool enabled; readonly float _height; public readonly TextStyle textStyle; public override float height { get { return _height; } } public readonly Widget child; public override bool represents(T value) { return Equals(value, this.value); } public override State createState() { return new PopupMenuItemState>(); } } public class PopupMenuItemState : State where W : PopupMenuItem { protected virtual Widget buildChild() { return widget.child; } protected virtual void handleTap() { Navigator.pop(context, widget.value); } public override Widget build(BuildContext context) { ThemeData theme = Theme.of(context); PopupMenuThemeData popupMenuTheme = PopupMenuTheme.of(context); TextStyle style = widget.textStyle ?? popupMenuTheme.textStyle ?? theme.textTheme.subtitle1; if (!widget.enabled) { style = style.copyWith(color: theme.disabledColor); } Widget item = new AnimatedDefaultTextStyle( style: style, duration: material_.kThemeChangeDuration, child: new Container( alignment: AlignmentDirectional.centerStart, constraints: new BoxConstraints(minHeight: widget.height), padding: EdgeInsets.symmetric(horizontal: material_._kMenuHorizontalPadding), child: buildChild() ) ); if (!widget.enabled) { bool isDark = theme.brightness == Brightness.dark; item = IconTheme.merge( data: new IconThemeData(opacity: isDark ? 0.5f : 0.38f), child: item ); } return new InkWell( onTap: widget.enabled ? handleTap : (GestureTapCallback) null, canRequestFocus: widget.enabled, child: item ); } } public class PopupMenuItemSingleTickerProviderState : SingleTickerProviderStateMixin where W : PopupMenuItem { protected virtual Widget buildChild() { return widget.child; } protected virtual void handleTap() { Navigator.pop(context, widget.value); } public override Widget build(BuildContext context) { ThemeData theme = Theme.of(context); PopupMenuThemeData popupMenuTheme = PopupMenuTheme.of(context); TextStyle style = widget.textStyle ?? popupMenuTheme.textStyle ?? theme.textTheme.subtitle1; if (!widget.enabled) { style = style.copyWith(color: theme.disabledColor); } Widget item = new AnimatedDefaultTextStyle( style: style, duration: material_.kThemeChangeDuration, child: new Container( alignment: AlignmentDirectional.centerStart, constraints: new BoxConstraints(minHeight: widget.height), padding: EdgeInsets.symmetric(horizontal: material_._kMenuHorizontalPadding), child: buildChild() ) ); if (!widget.enabled) { bool isDark = theme.brightness == Brightness.dark; item = IconTheme.merge( data: new IconThemeData(opacity: isDark ? 0.5f : 0.38f), child: item ); } return new InkWell( onTap: widget.enabled ? handleTap : (GestureTapCallback) null, canRequestFocus: widget.enabled, child: item ); } } public class CheckedPopupMenuItem : PopupMenuItem { public CheckedPopupMenuItem( Key key = null, T value = default, bool isChecked = false, bool enabled = true, Widget child = null ) : base( key: key, value: value, enabled: enabled, child: child ) { this.isChecked = isChecked; } public readonly bool isChecked; public override State createState() { return new _CheckedPopupMenuItemState(); } } class _CheckedPopupMenuItemState : PopupMenuItemSingleTickerProviderState> { static readonly TimeSpan _fadeDuration = new TimeSpan(0, 0, 0, 0, 150); AnimationController _controller; Animation _opacity { get { return _controller.view; } } public override void initState() { base.initState(); _controller = new AnimationController(duration: _fadeDuration, vsync: this); _controller.setValue(widget.isChecked ? 1.0f : 0.0f); _controller.addListener(() => setState(() => { /* animation changed */ })); } protected override void handleTap() { if (widget.isChecked) { _controller.reverse(); } else { _controller.forward(); } base.handleTap(); } protected override Widget buildChild() { return new ListTile( enabled: widget.enabled, leading: new FadeTransition( opacity: _opacity, child: new Icon(_controller.isDismissed ? null : Icons.done) ), title: widget.child ); } } class _PopupMenu : StatelessWidget { public _PopupMenu( Key key = null, _PopupMenuRoute route = null ) : base(key: key) { this.route = route; } public readonly _PopupMenuRoute route; public override Widget build(BuildContext context) { float unit = 1.0f / (route.items.Count + 1.5f); List children = new List(); PopupMenuThemeData popupMenuTheme = PopupMenuTheme.of(context); for (int i = 0; i < route.items.Count; i += 1) { int index = i; float start = (index + 1) * unit; float end = (start + 1.5f * unit).clamp(0.0f, 1.0f); CurvedAnimation opacityCurvedAnimation = new CurvedAnimation( parent: route.animation, curve: new Interval(start, end) ); Widget item = route.items[index]; if (route.initialValue != null && route.items[index].represents((T) route.initialValue)) { item = new Container( color: Theme.of(context).highlightColor, child: item ); } children.Add( new _MenuItem( onLayout: (Size size) => { route.itemSizes[index] = size; }, child: new FadeTransition( opacity: opacityCurvedAnimation, child: item ) ) ); } CurveTween opacity = new CurveTween(curve: new Interval(0.0f, 1.0f / 3.0f)); CurveTween width = new CurveTween(curve: new Interval(0.0f, unit)); CurveTween height = new CurveTween(curve: new Interval(0.0f, unit * route.items.Count)); Widget child = new ConstrainedBox( constraints: new BoxConstraints( minWidth: material_._kMenuMinWidth, maxWidth: material_._kMenuMaxWidth ), child: new IntrinsicWidth( stepWidth: material_._kMenuWidthStep, child: new SingleChildScrollView( padding: EdgeInsets.symmetric( vertical: material_._kMenuVerticalPadding ), child: new ListBody(children: children) ) ) ); return new AnimatedBuilder( animation: route.animation, builder: (_, builderChild) => { return new Opacity( opacity: opacity.evaluate(route.animation), child: new Material( shape: route.shape ?? popupMenuTheme.shape, color: route.color ?? popupMenuTheme.color, type: MaterialType.card, elevation: route.elevation ?? popupMenuTheme.elevation ?? 8.0f, child: new Align( alignment: Alignment.topRight, widthFactor: width.evaluate(route.animation), heightFactor: height.evaluate(route.animation), child: builderChild ) ) ); }, child: child ); } } class _PopupMenuRouteLayout : SingleChildLayoutDelegate { public _PopupMenuRouteLayout(RelativeRect position, List itemSizes, int selectedItemIndex, TextDirection? textDirection) { this.position = position; this.itemSizes = itemSizes; this.selectedItemIndex = selectedItemIndex; this.textDirection = textDirection; } public readonly RelativeRect position; public List itemSizes; public readonly int selectedItemIndex; public readonly TextDirection? textDirection; public override BoxConstraints getConstraintsForChild(BoxConstraints constraints) { return BoxConstraints.loose( constraints.biggest - new Offset(material_._kMenuScreenPadding * 2.0f, material_._kMenuScreenPadding * 2.0f) ); } public override Offset getPositionForChild(Size size, Size childSize) { float y = position.top; if (selectedItemIndex != null && itemSizes != null) { float selectedItemOffset = material_._kMenuVerticalPadding; for (int index = 0; index < selectedItemIndex; index += 1) selectedItemOffset += itemSizes[index].height; selectedItemOffset += itemSizes[selectedItemIndex].height / 2; y = position.top + (size.height - position.top - position.bottom) / 2.0f - selectedItemOffset; } float x = 0; if (position.left > position.right) { x = size.width - position.right - childSize.width; } else if (position.left < position.right) { x = position.left; } else { D.assert(textDirection != null); switch (textDirection) { case TextDirection.rtl: x = size.width - position.right - childSize.width; break; case TextDirection.ltr: x = position.left; break; } } if (x < material_._kMenuScreenPadding) { x = material_._kMenuScreenPadding; } else if (x + childSize.width > size.width - material_._kMenuScreenPadding) { x = size.width - childSize.width - material_._kMenuScreenPadding; } if (y < material_._kMenuScreenPadding) { y = material_._kMenuScreenPadding; } else if (y + childSize.height > size.height - material_._kMenuScreenPadding) { y = size.height - childSize.height - material_._kMenuScreenPadding; } return new Offset(x, y); } public override bool shouldRelayout(SingleChildLayoutDelegate oldDelegate) { if (oldDelegate is _PopupMenuRouteLayout popupMenu) { D.assert(itemSizes.Count == popupMenu.itemSizes.Count); return position != popupMenu.position || selectedItemIndex != popupMenu.selectedItemIndex || textDirection != popupMenu.textDirection || !itemSizes.equalsList(popupMenu.itemSizes); } else { return false; } } } class _PopupMenuRoute : PopupRoute { public _PopupMenuRoute( RelativeRect position = null, List> items = null, T initialValue = default, float? elevation = 8.0f, ThemeData theme = null, PopupMenuThemeData popupMenuTheme = null, string barrierLabel = null, ShapeBorder shape = null, Color color = null, BuildContext showMenuContext = null, bool? captureInheritedThemes = null ) { this.position = position; this.items = items; this.initialValue = initialValue; this.elevation = elevation; this.theme = theme; this.popupMenuTheme = popupMenuTheme; this.barrierLabel = barrierLabel; this.shape = shape; this.color = color; this.showMenuContext = showMenuContext; this.captureInheritedThemes = captureInheritedThemes; itemSizes = new List(new Size[items.Count]); } public readonly RelativeRect position; public readonly List> items; public readonly List itemSizes; public readonly T initialValue; public readonly float? elevation; public readonly ThemeData theme; public readonly ShapeBorder shape; public readonly Color color; public readonly PopupMenuThemeData popupMenuTheme; public readonly BuildContext showMenuContext; public readonly bool? captureInheritedThemes; public override Animation createAnimation() { return new CurvedAnimation( parent: base.createAnimation(), curve: Curves.linear, reverseCurve: new Interval(0.0f, material_._kMenuCloseIntervalEnd) ); } public override TimeSpan transitionDuration { get { return material_._kMenuDuration; } } public override bool barrierDismissible { get { return true; } } public override Color barrierColor { get { return null; } } public override string barrierLabel { get; } public override Widget buildPage(BuildContext context, Animation animation, Animation secondaryAnimation) { int? selectedItemIndex = null; if (initialValue != null) { for (int index = 0; selectedItemIndex == null && index < items.Count; index += 1) { if (items[index].represents(initialValue)) selectedItemIndex = index; } } Widget menu = new _PopupMenu(route: this); if (captureInheritedThemes ?? false) { menu = InheritedTheme.captureAll(showMenuContext, menu); } else { if (theme != null) menu = new Theme(data: theme, child: menu); } return MediaQuery.removePadding( context: context, removeTop: true, removeBottom: true, removeLeft: true, removeRight: true, child: new Builder( builder: _ => new CustomSingleChildLayout( layoutDelegate: new _PopupMenuRouteLayout( position, itemSizes, selectedItemIndex ?? 0, Directionality.of(context) ), child: menu )) ); } } public partial class material_ { public static Future showMenu( BuildContext context, RelativeRect position, List> items, T initialValue, float? elevation, ShapeBorder shape, Color color, bool captureInheritedThemes = true, bool useRootNavigator = false ) { D.assert(context != null); D.assert(position != null); D.assert(items != null && items.isNotEmpty()); D.assert(material_.debugCheckHasMaterialLocalizations(context)); return Navigator.of(context, rootNavigator: useRootNavigator).push(new _PopupMenuRoute( position: position, items: items, initialValue: initialValue, elevation: elevation, theme: Theme.of(context, shadowThemeOnly: true), popupMenuTheme: PopupMenuTheme.of(context), barrierLabel: MaterialLocalizations.of(context).modalBarrierDismissLabel, shape: shape, color: color, showMenuContext: context, captureInheritedThemes: captureInheritedThemes )).to(); } } public delegate void PopupMenuItemSelected(T value); public delegate void PopupMenuCanceled(); public delegate List> PopupMenuItemBuilder(BuildContext context); public class PopupMenuButton : StatefulWidget { public PopupMenuButton( Key key = null, PopupMenuItemBuilder itemBuilder = null, T initialValue = default, PopupMenuItemSelected onSelected = null, PopupMenuCanceled onCanceled = null, string tooltip = null, float? elevation = null, EdgeInsetsGeometry padding = null, Widget child = null, Icon icon = null, Offset offset = null, bool enabled = true, ShapeBorder shape = null, Color color = null, bool captureInheritedThemes = true ) : base(key: key) { offset = offset ?? Offset.zero; D.assert(itemBuilder != null); D.assert(offset != null); D.assert(!(child != null && icon != null), () => "You can only pass [child] or [icon], not both."); this.itemBuilder = itemBuilder; this.initialValue = initialValue; this.onSelected = onSelected; this.onCanceled = onCanceled; this.tooltip = tooltip; this.elevation = elevation; this.padding = padding ?? EdgeInsets.all(8.0f); this.child = child; this.icon = icon; this.offset = offset; this.enabled = enabled; this.shape = shape; this.color = color; this.captureInheritedThemes = captureInheritedThemes; } public readonly PopupMenuItemBuilder itemBuilder; public readonly T initialValue; public readonly PopupMenuItemSelected onSelected; public readonly PopupMenuCanceled onCanceled; public readonly string tooltip; public readonly float? elevation; public readonly EdgeInsetsGeometry padding; public readonly Widget child; public readonly Widget icon; public readonly Offset offset; public readonly bool enabled; public readonly ShapeBorder shape; public readonly Color color; public readonly bool captureInheritedThemes; public override State createState() { return new PopupMenuButtonState(); } } public class PopupMenuButtonState : State> { void showButtonMenu() { PopupMenuThemeData popupMenuTheme = PopupMenuTheme.of(context); RenderBox button = (RenderBox) context.findRenderObject(); RenderBox overlay = (RenderBox) Overlay.of(context).context.findRenderObject(); RelativeRect position = RelativeRect.fromRect( Rect.fromPoints( button.localToGlobal(widget.offset, ancestor: overlay), button.localToGlobal(button.size.bottomRight(Offset.zero), ancestor: overlay) ), Offset.zero & overlay.size ); List> items = widget.itemBuilder(context); if (items.isNotEmpty()) { material_.showMenu( context: context, elevation: widget.elevation ?? popupMenuTheme.elevation, items: items, initialValue: widget.initialValue, position: position, shape: widget.shape ?? popupMenuTheme.shape, color: widget.color ?? popupMenuTheme.color, captureInheritedThemes: widget.captureInheritedThemes ) .then(newValue => { if (!mounted) return; if (newValue == null) { if (widget.onCanceled != null) widget.onCanceled(); return; } if (widget.onSelected != null) widget.onSelected((T) newValue); }); } } Icon _getIcon(RuntimePlatform platform) { switch (platform) { case RuntimePlatform.IPhonePlayer: case RuntimePlatform.OSXEditor: case RuntimePlatform.OSXPlayer: return new Icon(Icons.more_horiz); default: return new Icon(Icons.more_vert); } } public override Widget build(BuildContext context) { D.assert(material_.debugCheckHasMaterialLocalizations(context)); if (widget.child != null) return new Tooltip( message: widget.tooltip ?? MaterialLocalizations.of(context).showMenuTooltip, child: new InkWell( onTap: widget.enabled ? showButtonMenu : (GestureTapCallback) null, canRequestFocus: widget.enabled, child: widget.child ) ); return new IconButton( icon: widget.icon ?? _getIcon(Theme.of(context).platform), padding: widget.padding, tooltip: widget.tooltip ?? MaterialLocalizations.of(context).showMenuTooltip, onPressed: widget.enabled ? showButtonMenu : (VoidCallback) null ); } } }