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684 行
26 KiB
684 行
26 KiB
using System;
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using System.Collections.Generic;
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using Unity.UIWidgets.animation;
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using Unity.UIWidgets.foundation;
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using Unity.UIWidgets.painting;
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using Unity.UIWidgets.rendering;
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using Unity.UIWidgets.service;
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using Unity.UIWidgets.ui;
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using Unity.UIWidgets.widgets;
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using UnityEngine;
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using Color = Unity.UIWidgets.ui.Color;
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using TextStyle = Unity.UIWidgets.painting.TextStyle;
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namespace Unity.UIWidgets.material {
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static class AppBarUtils {
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internal const float _kLeadingWidth = Constants.kToolbarHeight;
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}
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class _ToolbarContainerLayout : SingleChildLayoutDelegate {
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public _ToolbarContainerLayout() {
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}
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public override BoxConstraints getConstraintsForChild(BoxConstraints constraints) {
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return constraints.tighten(height: Constants.kToolbarHeight);
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}
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public override Size getSize(BoxConstraints constraints) {
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return new Size(constraints.maxWidth, Constants.kToolbarHeight);
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}
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public override Offset getPositionForChild(Size size, Size childSize) {
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return new Offset(0.0f, size.height - childSize.height);
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}
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public override bool shouldRelayout(SingleChildLayoutDelegate oldDelegate) {
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return false;
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}
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}
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public class AppBar : PreferredSizeWidget {
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public AppBar(
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Key key = null,
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Widget leading = null,
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bool automaticallyImplyLeading = true,
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Widget title = null,
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List<Widget> actions = null,
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Widget flexibleSpace = null,
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PreferredSizeWidget bottom = null,
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float? elevation = null,
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Color backgroundColor = null,
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Brightness? brightness = null,
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IconThemeData iconTheme = null,
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TextTheme textTheme = null,
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bool primary = true,
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bool? centerTitle = null,
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float titleSpacing = NavigationToolbar.kMiddleSpacing,
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float toolbarOpacity = 1.0f,
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float bottomOpacity = 1.0f
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) : base(key: key) {
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D.assert(elevation == null || elevation >= 0.0);
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this.leading = leading;
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this.automaticallyImplyLeading = automaticallyImplyLeading;
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this.title = title;
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this.actions = actions;
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this.flexibleSpace = flexibleSpace;
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this.bottom = bottom;
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this.elevation = elevation;
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this.backgroundColor = backgroundColor;
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this.brightness = brightness;
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this.iconTheme = iconTheme;
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this.textTheme = textTheme;
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this.primary = primary;
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this.centerTitle = centerTitle;
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this.titleSpacing = titleSpacing;
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this.toolbarOpacity = toolbarOpacity;
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this.bottomOpacity = bottomOpacity;
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this.preferredSize = Size.fromHeight(Constants.kToolbarHeight + (bottom?.preferredSize?.height ?? 0.0f));
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}
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public readonly Widget leading;
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public readonly bool automaticallyImplyLeading;
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public readonly Widget title;
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public readonly List<Widget> actions;
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public readonly Widget flexibleSpace;
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public readonly PreferredSizeWidget bottom;
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public readonly float? elevation;
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public readonly Color backgroundColor;
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public readonly Brightness? brightness;
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public readonly IconThemeData iconTheme;
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public readonly TextTheme textTheme;
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public readonly bool primary;
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public readonly bool? centerTitle;
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public readonly float titleSpacing;
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public readonly float toolbarOpacity;
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public readonly float bottomOpacity;
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public override Size preferredSize { get; }
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public bool? _getEffectiveCenterTitle(ThemeData themeData) {
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if (this.centerTitle != null) {
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return this.centerTitle;
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}
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switch (themeData.platform) {
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case RuntimePlatform.IPhonePlayer:
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return this.actions == null || this.actions.Count < 2;
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default:
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return false;
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}
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}
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public override State createState() {
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return new _AppBarState();
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}
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}
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class _AppBarState : State<AppBar> {
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const float _defaultElevation = 4.0f;
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void _handleDrawerButton() {
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Scaffold.of(this.context).openDrawer();
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}
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void _handleDrawerButtonEnd() {
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Scaffold.of(this.context).openEndDrawer();
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}
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public override Widget build(BuildContext context) {
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D.assert(MaterialD.debugCheckHasMaterialLocalizations(context));
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ThemeData themeData = Theme.of(context);
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AppBarTheme appBarTheme = AppBarTheme.of(context);
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ScaffoldState scaffold = Scaffold.of(context, nullOk: true);
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ModalRoute parentRoute = ModalRoute.of(context);
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bool hasDrawer = scaffold?.hasDrawer ?? false;
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bool hasEndDrawer = scaffold?.hasEndDrawer ?? false;
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bool canPop = parentRoute?.canPop ?? false;
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bool useCloseButton = parentRoute is PageRoute && ((PageRoute) parentRoute).fullscreenDialog;
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IconThemeData appBarIconTheme = this.widget.iconTheme
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?? appBarTheme.iconTheme
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?? themeData.primaryIconTheme;
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TextStyle centerStyle = this.widget.textTheme?.title
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?? appBarTheme.textTheme?.title
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?? themeData.primaryTextTheme.title;
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TextStyle sideStyle = this.widget.textTheme?.body1
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?? appBarTheme.textTheme?.body1
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?? themeData.primaryTextTheme.body1;
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if (this.widget.toolbarOpacity != 1.0f) {
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float opacity =
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new Interval(0.25f, 1.0f, curve: Curves.fastOutSlowIn).transform(this.widget.toolbarOpacity);
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if (centerStyle?.color != null) {
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centerStyle = centerStyle.copyWith(color: centerStyle.color.withOpacity(opacity));
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}
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if (sideStyle?.color != null) {
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sideStyle = sideStyle.copyWith(color: sideStyle.color.withOpacity(opacity));
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}
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appBarIconTheme = appBarIconTheme.copyWith(
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opacity: opacity * (appBarIconTheme.opacity ?? 1.0f)
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);
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}
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Widget leading = this.widget.leading;
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if (leading == null && this.widget.automaticallyImplyLeading) {
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if (hasDrawer) {
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leading = new IconButton(
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icon: new Icon(Icons.menu),
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onPressed: this._handleDrawerButton,
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tooltip: MaterialLocalizations.of(context).openAppDrawerTooltip);
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}
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else {
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if (canPop) {
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leading = useCloseButton ? (Widget) new CloseButton() : new BackButton();
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}
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}
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}
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if (leading != null) {
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leading = new ConstrainedBox(
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constraints: BoxConstraints.tightFor(width: AppBarUtils._kLeadingWidth),
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child: leading);
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}
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Widget title = this.widget.title;
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if (title != null) {
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title = new DefaultTextStyle(
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style: centerStyle,
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softWrap: false,
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overflow: TextOverflow.ellipsis,
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child: title);
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}
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Widget actions = null;
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if (this.widget.actions != null && this.widget.actions.isNotEmpty()) {
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actions = new Row(
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mainAxisSize: MainAxisSize.min,
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crossAxisAlignment: CrossAxisAlignment.stretch,
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children: this.widget.actions);
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}
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else if (hasEndDrawer) {
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actions = new IconButton(
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icon: new Icon(Icons.menu),
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onPressed: this._handleDrawerButtonEnd,
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tooltip: MaterialLocalizations.of(context).openAppDrawerTooltip);
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}
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Widget toolbar = new NavigationToolbar(
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leading: leading,
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middle: title,
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trailing: actions,
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centerMiddle: this.widget._getEffectiveCenterTitle(themeData).Value,
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middleSpacing: this.widget.titleSpacing);
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Widget appBar = new ClipRect(
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child: new CustomSingleChildLayout(
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layoutDelegate: new _ToolbarContainerLayout(),
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child: IconTheme.merge(
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data: appBarIconTheme,
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child: new DefaultTextStyle(
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style: sideStyle,
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child: toolbar)
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)
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)
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);
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if (this.widget.bottom != null) {
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appBar = new Column(
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mainAxisAlignment: MainAxisAlignment.spaceBetween,
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children: new List<Widget> {
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new Flexible(
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child: new ConstrainedBox(
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constraints: new BoxConstraints(maxHeight: Constants.kToolbarHeight),
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child: appBar
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)
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),
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this.widget.bottomOpacity == 1.0f
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? (Widget) this.widget.bottom
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: new Opacity(
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opacity: new Interval(0.25f, 1.0f, curve: Curves.fastOutSlowIn).transform(this.widget
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.bottomOpacity),
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child: this.widget.bottom
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)
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}
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);
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}
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if (this.widget.primary) {
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appBar = new SafeArea(
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top: true,
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child: appBar);
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}
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appBar = new Align(
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alignment: Alignment.topCenter,
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child: appBar);
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if (this.widget.flexibleSpace != null) {
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appBar = new Stack(
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fit: StackFit.passthrough,
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children: new List<Widget> {
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this.widget.flexibleSpace,
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appBar
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}
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);
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}
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Brightness brightness = this.widget.brightness
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?? appBarTheme.brightness
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?? themeData.primaryColorBrightness;
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SystemUiOverlayStyle overlayStyle = brightness == Brightness.dark
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? SystemUiOverlayStyle.light
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: SystemUiOverlayStyle.dark;
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return new AnnotatedRegion<SystemUiOverlayStyle>(
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value: overlayStyle,
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child: new Material(
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color: this.widget.backgroundColor
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?? appBarTheme.color
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?? themeData.primaryColor,
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elevation: this.widget.elevation
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?? appBarTheme.elevation
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?? _defaultElevation,
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child: appBar
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));
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}
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}
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class _FloatingAppBar : StatefulWidget {
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public _FloatingAppBar(Key key = null, Widget child = null) : base(key: key) {
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this.child = child;
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}
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public readonly Widget child;
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public override State createState() {
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return new _FloatingAppBarState();
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}
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}
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class _FloatingAppBarState : State<_FloatingAppBar> {
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ScrollPosition _position;
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public _FloatingAppBarState() {
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}
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public override void didChangeDependencies() {
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base.didChangeDependencies();
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if (this._position != null) {
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this._position.isScrollingNotifier.removeListener(this._isScrollingListener);
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}
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this._position = Scrollable.of(this.context)?.position;
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if (this._position != null) {
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this._position.isScrollingNotifier.addListener(this._isScrollingListener);
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}
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}
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public override void dispose() {
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if (this._position != null) {
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this._position.isScrollingNotifier.removeListener(this._isScrollingListener);
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}
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base.dispose();
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}
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RenderSliverFloatingPersistentHeader _headerRenderer() {
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return (RenderSliverFloatingPersistentHeader) this.context.ancestorRenderObjectOfType(
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new TypeMatcher<RenderSliverFloatingPersistentHeader>());
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}
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void _isScrollingListener() {
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if (this._position == null) {
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return;
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}
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RenderSliverFloatingPersistentHeader header = this._headerRenderer();
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if (this._position.isScrollingNotifier.value) {
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header?.maybeStopSnapAnimation(this._position.userScrollDirection);
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}
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else {
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header?.maybeStartSnapAnimation(this._position.userScrollDirection);
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}
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}
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public override Widget build(BuildContext context) {
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return this.widget.child;
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}
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}
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class _SliverAppBarDelegate : SliverPersistentHeaderDelegate {
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public _SliverAppBarDelegate(
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Widget leading,
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bool automaticallyImplyLeading,
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Widget title,
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List<Widget> actions,
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Widget flexibleSpace,
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PreferredSizeWidget bottom,
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float? elevation,
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bool forceElevated,
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Color backgroundColor,
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Brightness? brightness,
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IconThemeData iconTheme,
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TextTheme textTheme,
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bool primary,
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bool? centerTitle,
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float titleSpacing,
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float? expandedHeight,
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float? collapsedHeight,
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float? topPadding,
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bool floating,
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bool pinned,
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FloatingHeaderSnapConfiguration snapConfiguration
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) {
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D.assert(primary || topPadding == 0.0);
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this.leading = leading;
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this.automaticallyImplyLeading = automaticallyImplyLeading;
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this.title = title;
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this.actions = actions;
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this.flexibleSpace = flexibleSpace;
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this.bottom = bottom;
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this.elevation = elevation;
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this.forceElevated = forceElevated;
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this.backgroundColor = backgroundColor;
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this.brightness = brightness;
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this.iconTheme = iconTheme;
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this.textTheme = textTheme;
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this.primary = primary;
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this.centerTitle = centerTitle;
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this.titleSpacing = titleSpacing;
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this.expandedHeight = expandedHeight;
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this.collapsedHeight = collapsedHeight;
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this.topPadding = topPadding;
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this.floating = floating;
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this.pinned = pinned;
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this._snapConfiguration = snapConfiguration;
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this._bottomHeight = bottom?.preferredSize?.height ?? 0.0f;
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}
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public readonly Widget leading;
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public readonly bool automaticallyImplyLeading;
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public readonly Widget title;
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public readonly List<Widget> actions;
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public readonly Widget flexibleSpace;
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public readonly PreferredSizeWidget bottom;
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public readonly float? elevation;
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public readonly bool forceElevated;
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public readonly Color backgroundColor;
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public readonly Brightness? brightness;
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public readonly IconThemeData iconTheme;
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public readonly TextTheme textTheme;
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public readonly bool primary;
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public readonly bool? centerTitle;
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public readonly float titleSpacing;
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public readonly float? expandedHeight;
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public readonly float? collapsedHeight;
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public readonly float? topPadding;
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public readonly bool floating;
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public readonly bool pinned;
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readonly float _bottomHeight;
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public override float? minExtent {
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get { return this.collapsedHeight ?? (this.topPadding + Constants.kToolbarHeight + this._bottomHeight); }
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}
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public override float? maxExtent {
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get {
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return Mathf.Max(
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(this.topPadding ?? 0.0f) + (this.expandedHeight ?? Constants.kToolbarHeight + this._bottomHeight),
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this.minExtent ?? 0.0f);
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}
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}
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public override FloatingHeaderSnapConfiguration snapConfiguration {
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get { return this._snapConfiguration; }
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}
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FloatingHeaderSnapConfiguration _snapConfiguration;
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public override Widget build(BuildContext context, float shrinkOffset, bool overlapsContent) {
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float? visibleMainHeight = this.maxExtent - shrinkOffset - this.topPadding;
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float toolbarOpacity = !this.pinned || (!this.floating && this.bottom != null)
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? ((visibleMainHeight - this._bottomHeight) / Constants.kToolbarHeight)?.clamp(0.0f, 1.0f) ?? 1.0f
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: 1.0f;
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Widget appBar = FlexibleSpaceBar.createSettings(
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minExtent: this.minExtent,
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maxExtent: this.maxExtent,
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currentExtent: Mathf.Max(this.minExtent ?? 0.0f, this.maxExtent ?? 0.0f - shrinkOffset),
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toolbarOpacity: toolbarOpacity,
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child: new AppBar(
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leading: this.leading,
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automaticallyImplyLeading: this.automaticallyImplyLeading,
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title: this.title,
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actions: this.actions,
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flexibleSpace: this.flexibleSpace,
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bottom: this.bottom,
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elevation: this.forceElevated || overlapsContent ||
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(this.pinned && shrinkOffset > this.maxExtent - this.minExtent)
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? this.elevation ?? 4.0f
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: 0.0f,
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backgroundColor: this.backgroundColor,
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brightness: this.brightness,
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iconTheme: this.iconTheme,
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textTheme: this.textTheme,
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primary: this.primary,
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centerTitle: this.centerTitle,
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titleSpacing: this.titleSpacing,
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toolbarOpacity: toolbarOpacity,
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bottomOpacity: this.pinned
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? 1.0f
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: (visibleMainHeight / this._bottomHeight)?.clamp(0.0f, 1.0f) ?? 1.0f
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)
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);
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return this.floating ? new _FloatingAppBar(child: appBar) : appBar;
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}
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public override bool shouldRebuild(SliverPersistentHeaderDelegate _oldDelegate) {
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_SliverAppBarDelegate oldDelegate = _oldDelegate as _SliverAppBarDelegate;
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return this.leading != oldDelegate.leading
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|| this.automaticallyImplyLeading != oldDelegate.automaticallyImplyLeading
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|| this.title != oldDelegate.title
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|| this.actions != oldDelegate.actions
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|| this.flexibleSpace != oldDelegate.flexibleSpace
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|| this.bottom != oldDelegate.bottom
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|| this._bottomHeight != oldDelegate._bottomHeight
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|| this.elevation != oldDelegate.elevation
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|| this.backgroundColor != oldDelegate.backgroundColor
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|| this.brightness != oldDelegate.brightness
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|| this.iconTheme != oldDelegate.iconTheme
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|| this.textTheme != oldDelegate.textTheme
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|| this.primary != oldDelegate.primary
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|| this.centerTitle != oldDelegate.centerTitle
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|| this.titleSpacing != oldDelegate.titleSpacing
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|| this.expandedHeight != oldDelegate.expandedHeight
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|| this.topPadding != oldDelegate.topPadding
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|| this.pinned != oldDelegate.pinned
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|| this.floating != oldDelegate.floating
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|| this.snapConfiguration != oldDelegate.snapConfiguration;
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}
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public override string ToString() {
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return
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$"{Diagnostics.describeIdentity(this)}(topPadding: {this.topPadding?.ToString("F1")}, bottomHeight: {this._bottomHeight.ToString("F1")}, ...)";
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}
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}
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public class SliverAppBar : StatefulWidget {
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public SliverAppBar(
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Key key = null,
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Widget leading = null,
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bool automaticallyImplyLeading = true,
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Widget title = null,
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List<Widget> actions = null,
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Widget flexibleSpace = null,
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PreferredSizeWidget bottom = null,
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float? elevation = null,
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bool forceElevated = false,
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Color backgroundColor = null,
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Brightness? brightness = null,
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IconThemeData iconTheme = null,
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TextTheme textTheme = null,
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bool primary = true,
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|
bool? centerTitle = null,
|
|
float titleSpacing = NavigationToolbar.kMiddleSpacing,
|
|
float? expandedHeight = null,
|
|
bool floating = false,
|
|
bool pinned = false,
|
|
bool snap = false
|
|
) : base(key: key) {
|
|
D.assert(floating || !snap, () => "The 'snap' argument only makes sense for floating app bars.");
|
|
this.leading = leading;
|
|
this.automaticallyImplyLeading = true;
|
|
this.title = title;
|
|
this.actions = actions;
|
|
this.flexibleSpace = flexibleSpace;
|
|
this.bottom = bottom;
|
|
this.elevation = elevation;
|
|
this.forceElevated = forceElevated;
|
|
this.backgroundColor = backgroundColor;
|
|
this.brightness = brightness;
|
|
this.iconTheme = iconTheme;
|
|
this.textTheme = textTheme;
|
|
this.primary = primary;
|
|
this.centerTitle = centerTitle;
|
|
this.titleSpacing = NavigationToolbar.kMiddleSpacing;
|
|
this.expandedHeight = expandedHeight;
|
|
this.floating = floating;
|
|
this.pinned = pinned;
|
|
this.snap = snap;
|
|
}
|
|
|
|
|
|
public readonly Widget leading;
|
|
|
|
public readonly bool automaticallyImplyLeading;
|
|
|
|
public readonly Widget title;
|
|
|
|
public readonly List<Widget> actions;
|
|
|
|
public readonly Widget flexibleSpace;
|
|
|
|
public readonly PreferredSizeWidget bottom;
|
|
|
|
public readonly float? elevation;
|
|
|
|
public readonly bool forceElevated;
|
|
|
|
public readonly Color backgroundColor;
|
|
|
|
public readonly Brightness? brightness;
|
|
|
|
public readonly IconThemeData iconTheme;
|
|
|
|
public readonly TextTheme textTheme;
|
|
|
|
public readonly bool primary;
|
|
|
|
public readonly bool? centerTitle;
|
|
|
|
public readonly float titleSpacing;
|
|
|
|
public readonly float? expandedHeight;
|
|
|
|
public readonly bool floating;
|
|
|
|
public readonly bool pinned;
|
|
|
|
public readonly bool snap;
|
|
|
|
public override State createState() {
|
|
return new _SliverAppBarState();
|
|
}
|
|
}
|
|
|
|
class _SliverAppBarState : TickerProviderStateMixin<SliverAppBar> {
|
|
FloatingHeaderSnapConfiguration _snapConfiguration;
|
|
|
|
void _updateSnapConfiguration() {
|
|
if (this.widget.snap && this.widget.floating) {
|
|
this._snapConfiguration = new FloatingHeaderSnapConfiguration(
|
|
vsync: this,
|
|
curve: Curves.easeOut,
|
|
duration: new TimeSpan(0, 0, 0, 0, 200)
|
|
);
|
|
}
|
|
else {
|
|
this._snapConfiguration = null;
|
|
}
|
|
}
|
|
|
|
public override void initState() {
|
|
base.initState();
|
|
this._updateSnapConfiguration();
|
|
}
|
|
|
|
public override void didUpdateWidget(StatefulWidget _oldWidget) {
|
|
base.didUpdateWidget(_oldWidget);
|
|
SliverAppBar oldWidget = _oldWidget as SliverAppBar;
|
|
if (this.widget.snap != oldWidget.snap || this.widget.floating != oldWidget.floating) {
|
|
this._updateSnapConfiguration();
|
|
}
|
|
}
|
|
|
|
public override Widget build(BuildContext context) {
|
|
D.assert(!this.widget.primary || WidgetsD.debugCheckHasMediaQuery(context));
|
|
float? topPadding = this.widget.primary ? MediaQuery.of(context).padding.top : 0.0f;
|
|
float? collapsedHeight = (this.widget.pinned && this.widget.floating && this.widget.bottom != null)
|
|
? this.widget.bottom.preferredSize.height + topPadding
|
|
: null;
|
|
|
|
return MediaQuery.removePadding(
|
|
context: context,
|
|
removeBottom: true,
|
|
child: new SliverPersistentHeader(
|
|
floating: this.widget.floating,
|
|
pinned: this.widget.pinned,
|
|
del: new _SliverAppBarDelegate(
|
|
leading: this.widget.leading,
|
|
automaticallyImplyLeading: this.widget.automaticallyImplyLeading,
|
|
title: this.widget.title,
|
|
actions: this.widget.actions,
|
|
flexibleSpace: this.widget.flexibleSpace,
|
|
bottom: this.widget.bottom,
|
|
elevation: this.widget.elevation,
|
|
forceElevated: this.widget.forceElevated,
|
|
backgroundColor: this.widget.backgroundColor,
|
|
brightness: this.widget.brightness,
|
|
iconTheme: this.widget.iconTheme,
|
|
textTheme: this.widget.textTheme,
|
|
primary: this.widget.primary,
|
|
centerTitle: this.widget.centerTitle,
|
|
titleSpacing: this.widget.titleSpacing,
|
|
expandedHeight: this.widget.expandedHeight,
|
|
collapsedHeight: collapsedHeight,
|
|
topPadding: topPadding,
|
|
floating: this.widget.floating,
|
|
pinned: this.widget.pinned,
|
|
snapConfiguration: this._snapConfiguration
|
|
)
|
|
)
|
|
);
|
|
}
|
|
}
|
|
}
|