protected override void OnAdd(RegionItem item)
{
_control.Controls.Add(item.HostControl);
item.HostControl.Dock = DockStyle.Fill;
item.HostControl.Visible = item.IsActive;
item.PropertyChanged += ItemPropertyChanged;
}
public void Add(object view)
{
Verify.ArgumentNotNull(view, "view");
object localView = view; // resharper wants a local copy because it is used in a lambda expression
RegionItem item = _regionItems.FirstOrDefault(x => x.Item == localView);
if (item != null)
{
throw new InvalidOperationException("View has already been added to the region");
}
Type type = view as Type;
if (type != null)
{
view = ServiceLocator.Current.GetInstance(type);
}
// Initialise the region item and add it to the appropriate collections. If
// the subclass fails its initialization for any reason, we will clean up.
Control hostControl;
try
{
hostControl = CreateHostControl();
}
catch (Exception ex)
{
_log.WarnFormat("Failed to add view to region", ex);
throw;
}
item = new RegionItem(this, view, hostControl);
item.PropertyChanged += Item_PropertyChanged;
_regionItems.Add(item);
_views.Add(item.Item);
try
{
OnAdd(item);
}
catch (Exception ex)
{
_log.WarnFormat("Failed to add view to region", ex);
Cleanup(item);
throw;
}
if (item.Task != null && !item.Task.IsRunning)
{
item.Task.Start(item.ViewManager);
}
}
protected override void OnRemove(RegionItem item)
{
TabPage tabPage = (TabPage) item.HostControl;
_control.TabPages.Remove(tabPage);
tabPage.Dispose();
}
protected override void OnAdd(RegionItem item)
{
TabPage tabPage = (TabPage) item.HostControl;
_control.TabPages.Add(tabPage);
item.PropertyChanged += ItemPropertyChanged;
}
/// <summary>
/// Cleanup a region item before discarding it forever
/// </summary>
/// <param name="item">Item to cleanup</param>
/// <remarks>
/// The item is being cleaned up either because it is no longer required, or because
/// the subclass failed to initialize properly. Careful, the item might not be in a
/// valid state.
/// </remarks>
private void Cleanup(RegionItem item)
{
_regionItems.Remove(item);
_views.Remove(item.Item);
_activeViews.Remove(item.Item);
item.PropertyChanged -= Item_PropertyChanged;
}
/// <summary>
/// Called by the derived class to inform that a region item has closed.
/// </summary>
/// <param name="item"></param>
protected void RegionItemClosed(RegionItem item)
{
Cleanup(item);
}
protected abstract void OnRemove(RegionItem item);
protected abstract void OnAdd(RegionItem item);
/// <summary>
/// Cleanup a region item before discarding it forever
/// </summary>
/// <param name="item">Item to cleanup</param>
/// <remarks>
/// The item is being cleaned up either because it is no longer required, or because
/// the subclass failed to initialize properly. Careful, the item might not be in a
/// valid state.
/// </remarks>
private void Cleanup(RegionItem item)
{
_regionItems.Remove(item);
_views.Remove(item.Item);
_activeViews.Remove(item.Item);
item.PropertyChanged -= Item_PropertyChanged;
if (item.Task != null && item.Task.IsRunning)
{
item.Task.EndTask();
}
}
protected override void OnRemove(RegionItem item)
{
_control.Controls.Remove(item.HostControl);
}
