prs/prs.desktop/Panels/Meeting/MeetingTreeView.cs

using System;
using System.Linq;
using System.Linq.Expressions;
using System.Threading;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Forms;
using Comal.Classes;
using InABox.Clients;
using InABox.Core;
using InABox.DynamicGrid;
using InABox.Wpf;
using InABox.WPF;

namespace PRSDesktop;

public class MeetingItemTree : DynamicDataGrid<MeetingItem>
{
    protected override IDynamicGridUIComponent<MeetingItem> CreateUIComponent()
    {
        var component = new DynamicGridTreeUIComponent<MeetingItem, Guid>(
            x => x.ID,
            x => x.Parent.ID,
            Guid.Empty)
        {
            Parent = this,
            ShowHeader = false,
            MaxRowHeight = 30,
            ShowNumbers = true
        };

        component.OnContextMenuOpening += MeetingItemTree_OnContextMenuOpening;

        return component;
    }

    protected override DynamicGridColumns LoadColumns()
    {
        var columns = new DynamicGridColumns();
        columns.Add<MeetingItem>(x => x.Title, 0, "Title", "", Alignment.MiddleLeft);
        return columns;
    }

    public MeetingModel? Model { get; set; }
    
    private void MeetingItemTree_OnContextMenuOpening(CoreTreeNode<Guid>? node, ContextMenu menu)
    {
        if(node is not null && node.ID != CoreUtils.FullGuid && Options.AddRows)
        {
            menu.AddItem("Add Child Item", null, node, (n) =>
            {
                var item = CreateItem();
                item.Parent.ID = n.ID;
                if (EditItems(new[] { item }))
                {
                    DoChanged();
                    Refresh(false, true);
                }
            });
        }
    }

    protected override void Reload(
    	Filters<MeetingItem> criteria, Columns<MeetingItem> columns, ref SortOrder<MeetingItem>? sort,
    	CancellationToken token, Action<CoreTable?, Exception?> action)
    {
        if(Model != null)
        {
            criteria.Add(new Filter<MeetingItem>(x => x.Meeting.ID).IsEqualTo(Model.ID));
        }
        base.Reload(criteria, columns, ref sort, token, action);
    }

    protected override bool CanCreateItems()
    {
        if (Model is null)
        {
            MessageWindow.ShowMessage("Please select a meeting first!", "No meeting selected");
            return false;
        }
        else
        {
            return base.CanCreateItems();
        }
    }

    public override MeetingItem CreateItem()
    {
        var item = base.CreateItem();
        item.Meeting.ID = Model.ID;
        item.Title = "New Agenda Item";
        return item;
    }
}