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using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using Tango.Core.ExtensionMethods;
using Tango.SharedUI.Components;
using Tango.SharedUI.Controls;
namespace Tango.FSE.Common.Controls
{
public class SelectionComboBox : Control
{
private bool _preventAllSelected = false;
private bool _preventSelection = false;
private ICollectionView _filterView;
private TextBox _filterTextBox;
private Popup _popup;
private Button _toggle;
private bool _preventToggle;
public bool? AllSelected
{
get { return (bool?)GetValue(AllSelectedProperty); }
set { SetValue(AllSelectedProperty, value); }
}
public static readonly DependencyProperty AllSelectedProperty =
DependencyProperty.Register("AllSelected", typeof(bool?), typeof(SelectionComboBox), new PropertyMetadata(null, (d, e) => (d as SelectionComboBox).OnAllSelectedChanged()));
public ISelectedObjectCollection ItemsSource
{
get { return (ISelectedObjectCollection)GetValue(ItemsSourceProperty); }
set { SetValue(ItemsSourceProperty, value); }
}
public static readonly DependencyProperty ItemsSourceProperty =
DependencyProperty.Register("ItemsSource", typeof(ISelectedObjectCollection), typeof(SelectionComboBox), new PropertyMetadata(null, (d, e) => (d as SelectionComboBox).OnItemsSourceChanged()));
public String DisplayMemberPath
{
get { return (String)GetValue(DisplayMemberPathProperty); }
set { SetValue(DisplayMemberPathProperty, value); }
}
public static readonly DependencyProperty DisplayMemberPathProperty =
DependencyProperty.Register("DisplayMemberPath", typeof(String), typeof(SelectionComboBox), new PropertyMetadata(null));
public String Filter
{
get { return (String)GetValue(FilterProperty); }
set { SetValue(FilterProperty, value); }
}
public static readonly DependencyProperty FilterProperty =
DependencyProperty.Register("Filter", typeof(String), typeof(SelectionComboBox), new PropertyMetadata(null, (d, e) => (d as SelectionComboBox).OnFilterChanged()));
public bool IsOpened
{
get { return (bool)GetValue(IsOpenedProperty); }
set { SetValue(IsOpenedProperty, value); }
}
public static readonly DependencyProperty IsOpenedProperty =
DependencyProperty.Register("IsOpened", typeof(bool), typeof(SelectionComboBox), new PropertyMetadata(false));
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
if (!this.IsInDesignMode())
{
_filterTextBox = GetTemplateChild("filterTextBox") as TextBox;
_popup = GetTemplateChild("popup") as Popup;
_toggle = GetTemplateChild("toggle") as Button;
_toggle.Click += _toggle_Click;
_popup.Opened += _popup_Opened;
_popup.Closed += _popup_Closed;
}
}
private void _toggle_Click(object sender, RoutedEventArgs e)
{
if (!_preventToggle)
{
if (!_popup.IsOpen)
{
_popup.IsOpen = true;
}
else
{
_popup.IsOpen = false;
}
}
_preventToggle = false;
}
private async void _popup_Closed(object sender, EventArgs e)
{
_preventToggle = true;
await Task.Delay(100);
_preventToggle = false;
}
private void _popup_Opened(object sender, EventArgs e)
{
_filterTextBox.Focus();
}
private void OnItemsSourceChanged()
{
if (ItemsSource != null)
{
_filterView = CollectionViewSource.GetDefaultView(ItemsSource);
_filterView.Filter = ApplyFilter;
ItemsSource.SelectionChanged += ItemsSource_SelectionChanged;
}
}
private void ItemsSource_SelectionChanged(object sender, EventArgs e)
{
if (!_preventSelection)
{
if (ItemsSource.GetItems().All(x => x.IsSelected))
{
_preventAllSelected = true;
AllSelected = true;
}
else if (ItemsSource.GetItems().All(x => !x.IsSelected))
{
_preventAllSelected = true;
AllSelected = false;
}
else
{
_preventAllSelected = true;
AllSelected = null;
}
}
_preventAllSelected = false;
}
private void OnAllSelectedChanged()
{
_preventSelection = true;
if (!_preventAllSelected && AllSelected != null)
{
foreach (var item in ItemsSource.GetItems())
{
item.IsSelected = AllSelected.Value;
}
}
_preventSelection = false;
}
private void OnFilterChanged()
{
_filterView?.Refresh();
}
private bool ApplyFilter(object obj)
{
if (Filter.IsNotNullOrEmpty())
{
if (obj is SelectedObject selectedObject)
{
try
{
return selectedObject.Data.GetPropertyValueByPath(DisplayMemberPath).ToStringSafe().ToLower().Contains(Filter.ToLower());
}
catch
{
return true;
}
}
else
{
return false;
}
}
else
{
return true;
}
}
static SelectionComboBox()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(SelectionComboBox), new FrameworkPropertyMetadata(typeof(SelectionComboBox)));
}
}
}
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