void ViewsTab_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
e.Handled = true; // This avoids to call a parent's SelectionChanged event (such as in another Tab).
var Item = (sender as TabControl).SelectedItem as TabItem;
if (Item == null)
{
return;
}
if (e.RemovedItems != null && e.RemovedItems.Count > 0)
{
var PrevTab = e.RemovedItems[0] as TabItem;
if (PrevTab != null)
{
var PrevView = RegisteredViews.FirstOrDefault(view => view != null && view.GlobalId.Equals((Guid)PrevTab.Tag));
if (PrevView != null)
{
PrevView.ReactToDeactivation();
}
}
}
var Target = RegisteredViews.FirstOrDefault(view => view != null && view.GlobalId.Equals((Guid)Item.Tag));
if (Target != null && this.PostViewActivation != null)
{
this.ActiveView = Target;
}
}
public override void NavigateTo(IView view)
{
if (view == null)
{
throw new ArgumentNullException("view");
}
if (CurrentView == view)
{
return;
}
//if the view is already registered, then simply focus on it.
for (int i = 0; i < RegisteredViews.Count; i++)
{
if (RegisteredViews[i] == view)
{
int lastPos = Cursor;
Cursor = i;
ViewController.Focus(RegisteredViews[i]);
OnCurrentPositionChanged(lastPos);
return;
}
}
//this is a new view; it's never been opened before. If we are at the end of the row, then
//simply add the view to the list. Otherwise, we have to close all views in front of the current one.
if (!this.CanGoForward())
{
RegisteredViews.Add(view);
OnAddedView(view, this.CurrentPosition + 1);
GoForward();
}
else
{
//Get the views that will be closed
List <IView> forwards = new List <IView>(GetForwards());
//ask the ViewController to close the views
if (ViewController.CloseViewRange(forwards))
{
//remove the closed views from the list
foreach (IView v in forwards)
{
RegisteredViews.Remove(v);
}
OnClosedForwards();
//add the newly added item, and focus it
RegisteredViews.Add(view);
OnAddedView(view, this.CurrentPosition + 1);
GoForward();
}
}
}
private void AddRegisteredViews()
{
if (Region != null)
{
var viewEntries = RegisteredViews.Where(v => v.Metadata.RegionName == Region.Name).OrderBy(v => v.Metadata.ArrangeIndex);
foreach (var viewEntry in viewEntries)
{
var view = viewEntry.Value;
if (!Region.Views.Contains(view))
{
Region.Add(view);
}
}
}
}
public static void ProvideView(ViewModelBase vm, ViewModelBase parentVm = null)
{
IViewMap map = Maps.SingleOrDefault(x => x.ViewModelType == vm.GetType());
if (map == null)
{
return;
}
var viewInstance = Activator.CreateInstance(map.ViewType) as Window;
if (viewInstance == null)
{
throw new InvalidOperationException(string.Format("Can not create an instance of {0}", map.ViewType));
}
if (parentVm != null)
{
ViewInstance parent = RegisteredViews.SingleOrDefault(x => x.ViewModel == parentVm);
if (parent != null)
{
Window parentView = parent.View;
if (Application.Current.Windows.OfType <Window>().Any(x => Equals(x, parentView)))
{
viewInstance.Owner = parentView;
}
}
}
viewInstance.DataContext = vm;
RegisteredViews.Add(new ViewInstance(viewInstance, vm));
viewInstance.Show();
}
