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using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Collections.Specialized;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
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.Commands;
using Tango.Touch.Controls;
namespace Tango.Explorer
{
public class ExplorerControl : Control
{
private bool _changing_current_path;
private TouchListBox _listBox;
public String CurrentPath
{
get { return (String)GetValue(CurrentPathProperty); }
set { SetValue(CurrentPathProperty, value); }
}
public static readonly DependencyProperty CurrentPathProperty =
DependencyProperty.Register("CurrentPath", typeof(String), typeof(ExplorerControl), new PropertyMetadata(null, (d, e) => (d as ExplorerControl).OnCurrentPathChanged()));
public ExplorerFolderItem CurrentFolder
{
get { return (ExplorerFolderItem)GetValue(CurrentFolderProperty); }
set { SetValue(CurrentFolderProperty, value); }
}
public static readonly DependencyProperty CurrentFolderProperty =
DependencyProperty.Register("CurrentFolder", typeof(ExplorerFolderItem), typeof(ExplorerControl), new PropertyMetadata(null, (d, e) => (d as ExplorerControl).OnCurrentFolderChanged()));
public ExplorerItem SelectedItem
{
get { return (ExplorerItem)GetValue(SelectedItemProperty); }
set { SetValue(SelectedItemProperty, value); }
}
public static readonly DependencyProperty SelectedItemProperty =
DependencyProperty.Register("SelectedItem", typeof(ExplorerItem), typeof(ExplorerControl), new PropertyMetadata(null, (d, e) => (d as ExplorerControl).OnSelectedItemChanged()));
public IEnumerable<ExplorerItem> SelectedItems
{
get { return (IEnumerable<ExplorerItem>)GetValue(SelectedItemsProperty); }
set { SetValue(SelectedItemsProperty, value); }
}
public static readonly DependencyProperty SelectedItemsProperty =
DependencyProperty.Register("SelectedItems", typeof(IEnumerable<ExplorerItem>), typeof(ExplorerControl), new PropertyMetadata(null, (d, e) => (d as ExplorerControl).OnSelectedItemsChanged()));
public RelayCommand BackCommand
{
get { return (RelayCommand)GetValue(BackCommandProperty); }
set { SetValue(BackCommandProperty, value); }
}
public static readonly DependencyProperty BackCommandProperty =
DependencyProperty.Register("BackCommand", typeof(RelayCommand), typeof(ExplorerControl), new PropertyMetadata(null));
public RelayCommand<ExplorerFileItem> FileSelectedCommand
{
get { return (RelayCommand<ExplorerFileItem>)GetValue(FileSelectedCommandProperty); }
set { SetValue(FileSelectedCommandProperty, value); }
}
public static readonly DependencyProperty FileSelectedCommandProperty =
DependencyProperty.Register("FileSelectedCommand", typeof(RelayCommand<ExplorerFileItem>), typeof(ExplorerControl), 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(ExplorerControl), new PropertyMetadata(null, (d, e) => (d as ExplorerControl).OnCurrentPathChanged()));
public bool EnableFileSelection
{
get { return (bool)GetValue(EnableFileSelectionProperty); }
set { SetValue(EnableFileSelectionProperty, value); }
}
public static readonly DependencyProperty EnableFileSelectionProperty =
DependencyProperty.Register("EnableFileSelection", typeof(bool), typeof(ExplorerControl), new PropertyMetadata(true));
public bool EnableMultiSelect
{
get { return (bool)GetValue(EnableMultiSelectProperty); }
set { SetValue(EnableMultiSelectProperty, value); }
}
public static readonly DependencyProperty EnableMultiSelectProperty =
DependencyProperty.Register("EnableMultiSelect", typeof(bool), typeof(ExplorerControl), new PropertyMetadata(false));
public bool IsMultiSelecting
{
get { return (bool)GetValue(IsMultiSelectingProperty); }
set { SetValue(IsMultiSelectingProperty, value); }
}
public static readonly DependencyProperty IsMultiSelectingProperty =
DependencyProperty.Register("IsMultiSelecting", typeof(bool), typeof(ExplorerControl), new PropertyMetadata(false));
static ExplorerControl()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(ExplorerControl), new FrameworkPropertyMetadata(typeof(ExplorerControl)));
}
public ExplorerControl()
{
BackCommand = new RelayCommand(NavigateBack);
}
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
_listBox = GetTemplateChild("PART_ListBox") as TouchListBox;
}
private void OnCurrentPathChanged()
{
if (_changing_current_path) return;
if (_listBox != null)
{
_listBox.IsMultiSelecting = false;
}
_changing_current_path = true;
if (CurrentPath == null)
{
CurrentFolder = null;
}
else if (Directory.Exists(CurrentPath))
{
CurrentFolder = ExplorerFolderItem.LoadFromPath(CurrentPath, Filter);
}
_changing_current_path = false;
}
private void OnCurrentFolderChanged()
{
if (_changing_current_path) return;
_changing_current_path = true;
CurrentPath = CurrentFolder.Path;
_changing_current_path = false;
}
private void OnSelectedItemChanged()
{
if (SelectedItem != null && _listBox != null)
{
if (SelectedItem is ExplorerFolderItem)
{
var folder = SelectedItem as ExplorerFolderItem;
folder = ExplorerFolderItem.LoadFromPath(folder.Path, Filter);
CurrentFolder = folder;
SelectedItem = null;
}
else if (SelectedItem is ExplorerFileItem && EnableFileSelection && !_listBox.IsMultiSelecting)
{
FileSelectedCommand?.Execute(SelectedItem);
}
}
}
private void OnSelectedItemsChanged()
{
if (SelectedItems != null)
{
if (SelectedItems is INotifyCollectionChanged)
{
(SelectedItems as INotifyCollectionChanged).CollectionChanged -= ExplorerControl_CollectionChanged;
(SelectedItems as INotifyCollectionChanged).CollectionChanged += ExplorerControl_CollectionChanged;
}
PreventMultiExtensionSelection();
}
}
private void ExplorerControl_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
PreventMultiExtensionSelection();
}
private void PreventMultiExtensionSelection()
{
if (_listBox != null && SelectedItems != null)
{
if (_listBox.IsMultiSelecting && _listBox.SelectedItems != null && _listBox.SelectedItems.Count > 1)
{
var firstItem = _listBox.SelectedItems.OfType<ExplorerFileItem>().FirstOrDefault();
if (firstItem != null)
{
foreach (var item in _listBox.SelectedItems.OfType<ExplorerFileItem>().ToList())
{
if (item.Extension.ToLower() != firstItem.Extension.ToLower())
{
var listBoxItem = _listBox.GetItems().FirstOrDefault(x => x.DataContext == item);
if (listBoxItem != null)
{
listBoxItem.IsSelected = false;
_listBox.SelectedItems.Remove(item);
}
}
}
}
}
}
}
public void NavigateBack()
{
if (CurrentFolder != null)
{
var parentPath = CurrentFolder.GetParentPath();
if (parentPath != null)
{
CurrentFolder = ExplorerFolderItem.LoadFromPath(parentPath, Filter);
}
}
}
}
}
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