protected virtual void OnNavigateForward(EventArgs e)
{
if (NavigateForward != null)
{
NavigateForward.Invoke(this, e);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="NavigationViewModel"/> class.
/// </summary>
public NavigationViewModel()
{
history = new ReactiveList <IPanePageViewModel>();
history.Changing.Subscribe(CollectionChanging);
history.Changed.Subscribe(CollectionChanged);
var pos = this.WhenAnyValue(
x => x.Index,
x => x.History.Count,
(i, c) => new { Index = i, Count = c });
content = pos
.Where(x => x.Index < x.Count)
.Select(x => x.Index != -1 ? history[x.Index] : null)
.StartWith((IPanePageViewModel)null)
.ToProperty(this, x => x.Content);
this.WhenAnyValue(x => x.Content)
.Buffer(2, 1)
.Subscribe(x => {
if (x[0] != null && history.Contains(x[0]))
{
x[0].Deactivated();
}
x[1]?.Activated();
});
NavigateBack = ReactiveCommand.Create(() => { }, pos.Select(x => x.Index > 0));
NavigateBack.Subscribe(_ => Back());
NavigateForward = ReactiveCommand.Create(() => { }, pos.Select(x => x.Index < x.Count - 1));
NavigateForward.Subscribe(_ => Forward());
}
/// <summary>
/// Initializes a new instance of the <see cref="NavigationViewModel"/> class.
/// </summary>
public NavigationViewModel()
{
history = new ReactiveList <IPanePageViewModel>();
history.BeforeItemsAdded.Subscribe(BeforeItemAdded);
history.CollectionChanged += CollectionChanged;
var pos = this.WhenAnyValue(
x => x.Index,
x => x.History.Count,
(i, c) => new { Index = i, Count = c });
content = pos
.Where(x => x.Index < x.Count)
.Select(x => x.Index != -1 ? history[x.Index] : null)
.StartWith((IPanePageViewModel)null)
.ToProperty(this, x => x.Content);
NavigateBack = ReactiveCommand.Create(pos.Select(x => x.Index > 0));
NavigateBack.Subscribe(_ => Back());
NavigateForward = ReactiveCommand.Create(pos.Select(x => x.Index < x.Count - 1));
NavigateForward.Subscribe(_ => Forward());
}
/// <summary>
/// Provides different key shortcuts
/// </summary>
/// <param name="key"></param>
public void KeyDown(VirtualKey key)
{
switch (key)
{
case VirtualKey.Left:
NavigateBack.ExecuteWhen();
break;
case VirtualKey.Right:
NavigateForward.ExecuteWhen();
break;
case VirtualKey.Back:
NavigateBack.ExecuteWhen();
break;
case VirtualKey.F5:
Refresh();
break;
case VirtualKey.F2:
RenameStorageItemSelectedAsync();
break;
case VirtualKey.Delete:
DeleteStorageItemSelected();
break;
}
var ctrlDown = Window.Current.CoreWindow.GetKeyState(VirtualKey.Control).HasFlag(CoreVirtualKeyStates.Down);
if (!ctrlDown)
{
return;
}
switch (key)
{
case VirtualKey.R:
Refresh();
break;
case VirtualKey.C:
CopyStorageItemSelected();
break;
case VirtualKey.X:
CutStorageItemSelected();
break;
case VirtualKey.V:
PasteStorageItemSelected();
break;
case VirtualKey.A:
if (SelectedItems.Count == FileSystemElements.Count)
{
SelectedItems.Clear();
}
else
{
for (int i = 0; i < FileSystemElements.Count; i++)
{
if (!SelectedItems.Contains(FileSystemElements[i]))
{
SelectedItems.Add(FileSystemElements[i]);
}
}
}
break;
}
}
public static void RaiseNavigateForward() => NavigateForward?.Invoke(null, EventArgs.Empty);
