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using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Data;
using Tango.BL;
using Tango.BL.Entities;
using Tango.Core.Commands;
using Tango.Core.DI;
using Tango.DragAndDrop;
using Tango.PPC.Common;
using Tango.PPC.Jobs.Messages;
using Tango.PPC.Jobs.Views;
namespace Tango.PPC.Jobs.ViewModels
{
/// <summary>
/// Represents the jobs view model.
/// </summary>
/// <seealso cref="Tango.PPC.Common.PPCViewModel" />
public class JobsViewVM : PPCViewModel
{
private ObservablesContext _jobsContext; //Holds the db context for the job list.
#region Properties
private ObservableCollection<Job> _jobs;
/// <summary>
/// Gets or sets the collection of jobs.
/// </summary>
public ObservableCollection<Job> Jobs
{
get { return _jobs; }
set { _jobs = value; RaisePropertyChangedAuto(); }
}
private ICollectionView _jobsCollectionView;
/// <summary>
/// Gets or sets the jobs collection view.
/// </summary>
public ICollectionView JobsCollectionView
{
get { return _jobsCollectionView; }
set
{
_jobsCollectionView = value;
RaisePropertyChangedAuto();
}
}
private bool _isLoadingJobs;
/// <summary>
/// Gets or sets a value indicating whether this instance is loading jobs.
/// </summary>
public bool IsLoadingJobs
{
get { return _isLoadingJobs; }
set { _isLoadingJobs = value; RaisePropertyChangedAuto(); }
}
#endregion
#region Commands
/// <summary>
/// Gets or sets the job selected command.
/// </summary>
public RelayCommand<Object> JobSelectedCommand { get; set; }
/// <summary>
/// Gets or sets the job drag and drop command.
/// </summary>
public RelayCommand<DropEventArgs> JobDragedDroppedCommand { get; set; }
#endregion
#region Constructors
/// <summary>
/// Initializes a new instance of the <see cref="JobsViewVM"/> class.
/// </summary>
public JobsViewVM()
{
Jobs = new ObservableCollection<Job>();
JobSelectedCommand = new RelayCommand<Object>((x) => JobSelected(x as Job));
JobDragedDroppedCommand = new RelayCommand<DropEventArgs>((e) =>
{
Job draggedJob = e.Draggable.DataContext as Job;
Job droppedJob = e.Droppable.DataContext as Job;
OnDragAndDropJob(draggedJob, droppedJob);
});
}
#endregion
#region Drag & Drop
/// <summary>
/// Called when a job has been dragged and dropped into another job.
/// </summary>
/// <param name="draggedJob">The dragged job.</param>
/// <param name="droppedJob">The dropped job.</param>
private void OnDragAndDropJob(Job draggedJob, Job droppedJob)
{
if (draggedJob.JobIndex > droppedJob.JobIndex)
{
draggedJob.JobIndex = droppedJob.JobIndex - 1;
}
else
{
draggedJob.JobIndex = droppedJob.JobIndex + 1;
}
int index = 1;
foreach (var job in Jobs.OrderBy(x => x.JobIndex))
{
job.JobIndex = index++;
}
JobsCollectionView.Refresh();
}
#endregion
#region Job Selection & Loading
/// <summary>
/// Handles the job selected command.
/// </summary>
/// <param name="job">The job.</param>
private void JobSelected(Job job)
{
NavigationManager.NavigateTo<JobsModule>(nameof(JobView));
RaiseMessage(new JobSelectedMessage() { Job = job });
}
/// <summary>
/// Loads the jobs the database.
/// </summary>
private void LoadJobs()
{
Task.Factory.StartNew(() =>
{
IsLoadingJobs = true;
Thread.Sleep(500);
if (_jobsContext != null)
{
_jobsContext.Dispose();
}
_jobsContext = ObservablesContext.CreateDefault();
Jobs = _jobsContext.Jobs.Where(x => x.Machine.SerialNumber == Settings.MachineSerialNumber).ToObservableCollection();
JobsCollectionView = CollectionViewSource.GetDefaultView(Jobs);
JobsCollectionView.SortDescriptions.Add(new SortDescription(nameof(Job.LastUpdated), ListSortDirection.Descending));
IsLoadingJobs = false;
});
}
#endregion
#region Override Methods
/// <summary>
/// Called when the application has been started.
/// </summary>
public override void OnApplicationStarted()
{
LoadJobs();
}
/// <summary>
/// Called when the navigation system has navigated to this VM view.
/// </summary>
public override void OnNavigatedTo()
{
base.OnNavigatedTo();
}
public override void OnNavigatedFrom()
{
base.OnNavigatedFrom();
}
#endregion
}
}
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