awesome-uiwidgets/AwesomeUIWidgets/Assets/Scripts/DateAndTimePicker.cs

using System;
using System.Collections.Generic;
using uiwidgets;
using Unity.UIWidgets.cupertino;
using Unity.UIWidgets.engine;
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 Text = Unity.UIWidgets.widgets.Text;
using ui_ = Unity.UIWidgets.widgets.ui_;
using TextStyle = Unity.UIWidgets.painting.TextStyle;

namespace UIWidgetsSample
{
    
    
    public class DatePickerDemo : UIWidgetsPanel
    {
        protected void OnEnable()
        {
            base.OnEnable();
        }

        protected override void main()
        {
            ui_.runApp(new MyApp());
        }

        class MyApp : StatelessWidget
        {
            public override Widget build(BuildContext context)
            {
                return new CupertinoApp(
                    home: new DateAndTimePickerWidget()
                );
            }
        }
    }

    public class DateAndTimePickerWidget : StatefulWidget {
       
        public override State createState() {
            return new DateAndTimePickerWidgetState();
        }
    }
       

    public class DateAndTimePickerWidgetState : State<DateAndTimePickerWidget>
    {
      
        Widget _buildMenu(List<Widget> children) {
            return new Container(
                decoration: new BoxDecoration(
                    color: CupertinoTheme.of(this.context).scaffoldBackgroundColor,
                    border: new Border(
                        top: new BorderSide(color: new Color(0xFFBCBBC1), width: 0.0f),
                        bottom: new BorderSide(color: new Color(0xFFBCBBC1), width: 0.0f)
                    )
                ),
                height: 44.0f,
                child: new Padding(
                    padding: EdgeInsets.symmetric(horizontal: 16.0f),
                    child: new SafeArea(
                        top: false,
                        bottom: false,
                        child: new Row(
                            //mainAxisAlignment: MainAxisAlignment.spaceBetween,
                            children: children
                        )
                    )
                )
            );
        }
        DateTime dateTime = DateTime.Now;
        
        Widget _buildBottomPicker(Widget picker) {
            return new Container(
                height: 216f,
                width : 500f,
                padding: EdgeInsets.only(top: 6.0f),
                color: Colors.white,
                child: new DefaultTextStyle(
                    style: new TextStyle(
                        color: Colors.red,
                        fontSize: 12.0f
                    ),
                    child: new GestureDetector(
                        // Blocks taps from propagating to the modal sheet and popping.
                        onTap: () => { },
                        child: new SafeArea(
                            top: false,
                            child: picker
                        )
                    )
                )
            );
        }
         Widget _buildDateAndTimePicker(BuildContext context) {
            return new GestureDetector(
                onTap: () => {
                    CupertinoRouteUtils.showCupertinoModalPopup(
                        context: context,
                        builder: (BuildContext _context) => {
                            return this._buildBottomPicker(
                                new CupertinoTheme(
                                data: new CupertinoThemeData(
                                    textTheme: new CupertinoTextThemeData(
                                        dateTimePickerTextStyle: new TextStyle(
                                            fontSize: 16,
                                            color: Colors.white
                                        )
                                    )
                                ),
                                child :new CupertinoDatePicker(
                                    backgroundColor: Colors.black,
                                    mode: CupertinoDatePickerMode.dateAndTime,
                                    initialDateTime: this.dateTime,
                                    onDateTimeChanged: (DateTime newDateTime) => {
                                        this.setState(() => this.dateTime = newDateTime);
                                    }
                                )
                            ));
                        }
                    );
                },
                child: new Text(
                    this.dateTime.ToString("MMMM dd, yyyy h:mm tt"),
                    style: new TextStyle(color: Colors.white)
                
                )
            );
        }
        public override Widget build(BuildContext context)
        {
            return new Container(
                color : Colors.black,
                child : this._buildDateAndTimePicker(context)
            );
        }
    }
}