inabox/inabox.wpf/DynamicGrid/ColumnFilter/DateDynamicGridColumnFilter.cs

using InABox.Core;
using InABox.WPF;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using Xceed.Wpf.Toolkit;

namespace InABox.DynamicGrid;

public class DateDynamicGridColumnFilter(IBaseDynamicGrid grid, DynamicColumnBase column) : IDynamicGridColumnFilter, INotifyPropertyChanged
{
    public event Action<IDynamicGridColumnFilter>? FilterChanged;
    public event PropertyChangedEventHandler? PropertyChanged;

    private DateTime? _fromDate;
    public DateTime? FromDate
    {
        get => _fromDate;
        set
        {
            _fromDate = value;
            FilterChanged?.Invoke(this);
            OnPropertyChanged();
        }
    }

    private DateTime? _toDate;
    public DateTime? ToDate
    {
        get => _toDate;
        set
        {
            _toDate = value;
            FilterChanged?.Invoke(this);
            OnPropertyChanged();
        }
    }

    public void ClearFilter()
    {
        _fromDate = null;
        _toDate = null;
        FilterChanged?.Invoke(this);
    }

    public FrameworkElement CreateControl()
    {
        var grid = new Grid();
        grid.AddColumn(GridUnitType.Star);
        grid.AddColumn(GridUnitType.Auto);

        grid.AddRow(GridUnitType.Auto);
        grid.AddRow(GridUnitType.Auto);

        grid.AddChild(new Label
        {
            Content = "From: ",
            VerticalAlignment = VerticalAlignment.Center
        }, 0, 0);
        var fromPicker = new DateTimePicker
        {
            Format = DateTimeFormat.Custom,
            FormatString = "dd MMM yyyy HH:mm",
            VerticalAlignment = VerticalAlignment.Stretch,
            VerticalContentAlignment = VerticalAlignment.Center,
            HorizontalContentAlignment = HorizontalAlignment.Center,
            CalendarDisplayMode = CalendarMode.Month,
            ShowButtonSpinner = false,
            Height = 25,
            Width = 150
        };
        fromPicker.Bind(DateTimePicker.ValueProperty, this, x => x.FromDate, mode: BindingMode.TwoWay);
        grid.AddChild(fromPicker, 0, 1);

        grid.AddChild(new Label
        {
            Content = "To: ",
            VerticalAlignment = VerticalAlignment.Center,
            Margin = new(0, 5, 0, 0)
        }, 1, 0);
        var toPicker = new DateTimePicker
        {
            Format = DateTimeFormat.Custom,
            FormatString = "dd MMM yyyy HH:mm",
            VerticalAlignment = VerticalAlignment.Stretch,
            VerticalContentAlignment = VerticalAlignment.Center,
            HorizontalContentAlignment = HorizontalAlignment.Center,
            CalendarDisplayMode = CalendarMode.Month,
            ShowButtonSpinner = false,
            Width = 150,
            Height = 25,
            Margin = new(0, 5, 0, 0)
        };
        toPicker.Bind(DateTimePicker.ValueProperty, this, x => x.ToDate, mode: BindingMode.TwoWay);
        grid.AddChild(toPicker, 1, 1);

        return grid;
    }

    public bool FilterRow(CoreRow row)
    {
        if(grid.GetData(row, column) is DateTime date)
        {
            return (_fromDate is null || date >= _fromDate.Value)
                && (_toDate is null || date <= _toDate.Value);
        }
        else
        {
            return true;
        }
    }

    public bool IsFiltered()
    {
        return _fromDate is not null || _toDate is not null;
    }

    private void OnPropertyChanged([CallerMemberName] string? propertyName = null)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}