private static void CheckAccess()
{
if (!WindowsHelper.CheckAccess())
{
throw new InvalidOperationException("View model properties and methods must be accessed on UI thread.");
}
}
void IActivatable.OnDeactivate(bool close)
{
// Note: The method is an explicit interface implementation because it should never be
// called directly. It should only be called by an IConductor through the IActivatable
// interface.
Debug.Assert(WindowsHelper.CheckAccess(), "Screen conduction not called on UI thread.");
Debug.Assert(IsOpen || !IsActive, "Invalid state: An item can only be active when it is open.");
if (!IsOpen)
{
return;
}
if (!IsActive && !close)
{
return;
}
IsActive = false;
if (close)
{
IsOpen = false;
}
OnDeactivated(new DeactivationEventArgs(close));
}
/// <inheritdoc/>
public void Show(StatusViewModel viewModel)
{
if (!WindowsHelper.CheckAccess())
{
throw new InvalidOperationException("Cross-thread operation not valid: The method needs to be invoked on the UI thread.");
}
_statusConductor.ActivateItem(viewModel);
}
void IActivatable.OnActivate()
{
// Note: The method is an explicit interface implementation because it should never be
// called directly. It should only be called by an IConductor through the IActivatable
// interface.
Debug.Assert(WindowsHelper.CheckAccess(), "Screen conduction not called on UI thread.");
Debug.Assert(IsOpen || !IsActive, "Invalid state: An item can only be active when it is open.");
if (IsActive)
{
return;
}
bool opened = !IsOpen;
IsOpen = true;
IsActive = true;
OnActivated(new ActivationEventArgs(opened));
}
