public MainVM(INav nav, IVmFactory _vmf, IAuth _auth)
{
Nav = nav;
AuthService = _auth;
NavCommand = new NavCommand(nav, _vmf);
NavCommand.Execute(ViewType.Login);
}
// handle keyboard navigation (tabs and gamepad)
private void HamburgerMenu_KeyDown(object sender, KeyRoutedEventArgs e)
{
var currentItem = FocusManager.GetFocusedElement() as FrameworkElement;
var lastItem = LoadedNavButtons.FirstOrDefault(x => x.HamburgerButtonInfo == (SecondaryButtons.LastOrDefault(a => a != Selected) ?? PrimaryButtons.LastOrDefault(a => a != Selected)));
var focus = new Func <FocusNavigationDirection, bool>(d =>
{
if (d == FocusNavigationDirection.Next)
{
return(FocusManager.TryMoveFocus(d));
}
else if (d == FocusNavigationDirection.Previous)
{
return(FocusManager.TryMoveFocus(d));
}
else
{
var control = FocusManager.FindNextFocusableElement(d) as Control;
return(control?.Focus(FocusState.Programmatic) ?? false);
}
});
var escape = new Func <bool>(() =>
{
if (DisplayMode == SplitViewDisplayMode.CompactOverlay ||
DisplayMode == SplitViewDisplayMode.Overlay)
{
IsOpen = false;
}
if (Equals(ShellSplitView.PanePlacement, SplitViewPanePlacement.Left))
{
ShellSplitView.Content.RenderTransform = new TranslateTransform {
X = 48 + ShellSplitView.OpenPaneLength
};
focus(FocusNavigationDirection.Right);
ShellSplitView.Content.RenderTransform = null;
}
else
{
ShellSplitView.Content.RenderTransform = new TranslateTransform {
X = -48 - ShellSplitView.OpenPaneLength
};
focus(FocusNavigationDirection.Left);
ShellSplitView.Content.RenderTransform = null;
}
return(true);
});
var previous = new Func <bool>(() =>
{
if (Equals(currentItem, HamburgerButton))
{
return(true);
}
else if (focus(FocusNavigationDirection.Previous) || focus(FocusNavigationDirection.Up))
{
return(true);
}
else
{
return(escape());
}
});
var next = new Func <bool>(() =>
{
if (Equals(currentItem, HamburgerButton))
{
return(focus(FocusNavigationDirection.Down));
}
else if (focus(FocusNavigationDirection.Next) || focus(FocusNavigationDirection.Down))
{
return(true);
}
else
{
return(escape());
}
});
if (IsFullScreen)
{
return;
}
switch (e.Key)
{
case VirtualKey.Up:
case VirtualKey.GamepadDPadUp:
if (!(e.Handled = previous()))
{
Debugger.Break();
}
break;
case VirtualKey.Down:
case VirtualKey.GamepadDPadDown:
if (!(e.Handled = next()))
{
Debugger.Break();
}
break;
case VirtualKey.Right:
case VirtualKey.GamepadDPadRight:
if (SecondaryButtonContainer.Items.Contains(currentItem?.DataContext) &&
SecondaryButtonOrientation == Orientation.Horizontal)
{
if (Equals(lastItem.FrameworkElement, currentItem))
{
if (!(e.Handled = escape()))
{
Debugger.Break();
}
}
else
{
if (!(e.Handled = next()))
{
Debugger.Break();
}
}
}
else
{
if (!(e.Handled = escape()))
{
Debugger.Break();
}
}
break;
case VirtualKey.Left:
case VirtualKey.GamepadDPadLeft:
if (SecondaryButtonContainer.Items.Contains(currentItem?.DataContext) &&
SecondaryButtonOrientation == Orientation.Horizontal)
{
if (Equals(lastItem.FrameworkElement, currentItem))
{
if (!(e.Handled = escape()))
{
Debugger.Break();
}
}
else
{
if (!(e.Handled = previous()))
{
Debugger.Break();
}
}
}
else
{
if (!(e.Handled = escape()))
{
Debugger.Break();
}
}
break;
case VirtualKey.Space:
case VirtualKey.Enter:
case VirtualKey.GamepadA:
if (currentItem != null)
{
var info = new InfoElement(currentItem);
var hamburgerButtonInfo = info.HamburgerButtonInfo;
if (hamburgerButtonInfo != null)
{
NavCommand.Execute(hamburgerButtonInfo);
}
}
break;
case VirtualKey.Escape:
case VirtualKey.GamepadB:
if (!(e.Handled = escape()))
{
Debugger.Break();
}
break;
}
}