public SelectionUIService(IDesignerHost host)
{
base.SetStyle(ControlStyles.OptimizedDoubleBuffer | ControlStyles.StandardClick | ControlStyles.Opaque, true);
this.host = host;
this.dragHandler = null;
this.dragComponents = null;
this.selectionItems = new Hashtable();
this.selectionHandlers = new Hashtable();
this.AllowDrop = true;
this.Text = "SelectionUIOverlay";
this.selSvc = (ISelectionService) host.GetService(typeof(ISelectionService));
if (this.selSvc != null)
{
this.selSvc.SelectionChanged += new EventHandler(this.OnSelectionChanged);
}
host.TransactionOpened += new EventHandler(this.OnTransactionOpened);
host.TransactionClosed += new DesignerTransactionCloseEventHandler(this.OnTransactionClosed);
if (host.InTransaction)
{
this.OnTransactionOpened(host, EventArgs.Empty);
}
IComponentChangeService service = (IComponentChangeService) host.GetService(typeof(IComponentChangeService));
if (service != null)
{
service.ComponentRemoved += new ComponentEventHandler(this.OnComponentRemove);
service.ComponentChanged += new ComponentChangedEventHandler(this.OnComponentChanged);
}
SystemEvents.DisplaySettingsChanged += new EventHandler(this.OnSystemSettingChanged);
SystemEvents.InstalledFontsChanged += new EventHandler(this.OnSystemSettingChanged);
SystemEvents.UserPreferenceChanged += new UserPreferenceChangedEventHandler(this.OnUserPreferenceChanged);
}
void ISelectionUIService.EndDrag(bool cancel)
{
this.containerDrag = null;
ISelectionUIHandler dragHandler = this.dragHandler;
object[] dragComponents = this.dragComponents;
this.dragHandler = null;
this.dragComponents = null;
this.dragRules = SelectionRules.None;
if (dragHandler == null)
{
throw new InvalidOperationException();
}
DesignerTransaction transaction = null;
try
{
IComponent component = dragComponents[0] as IComponent;
if ((dragComponents.Length > 1) || (((dragComponents.Length == 1) && (component != null)) && (component.Site == null)))
{
transaction = this.host.CreateTransaction(System.Design.SR.GetString("DragDropMoveComponents", new object[] { dragComponents.Length }));
}
else if ((dragComponents.Length == 1) && (component != null))
{
transaction = this.host.CreateTransaction(System.Design.SR.GetString("DragDropMoveComponent", new object[] { component.Site.Name }));
}
try
{
dragHandler.EndDrag(dragComponents, cancel);
}
catch (Exception)
{
}
}
finally
{
if (transaction != null)
{
transaction.Commit();
}
base.Visible = this.savedVisible;
((ISelectionUIService) this).SyncSelection();
if (this.dragTransaction != null)
{
this.dragTransaction.Commit();
this.dragTransaction = null;
}
this.EndMouseDrag(Control.MousePosition);
}
}
void ISelectionUIService.ClearSelectionUIHandler(object component, ISelectionUIHandler handler)
{
ISelectionUIHandler handler2 = (ISelectionUIHandler) this.selectionHandlers[component];
if (handler2 == handler)
{
this.selectionHandlers[component] = null;
}
}
bool ISelectionUIService.BeginDrag(SelectionRules rules, int initialX, int initialY)
{
if (this.dragHandler != null)
{
return false;
}
if (rules == SelectionRules.None)
{
return false;
}
if (this.selSvc == null)
{
return false;
}
this.savedVisible = base.Visible;
ICollection selectedComponents = this.selSvc.GetSelectedComponents();
object[] array = new object[selectedComponents.Count];
selectedComponents.CopyTo(array, 0);
array = ((ISelectionUIService) this).FilterSelection(array, rules);
if (array.Length == 0)
{
return false;
}
ISelectionUIHandler handler = null;
object primarySelection = this.selSvc.PrimarySelection;
if (primarySelection != null)
{
handler = this.GetHandler(primarySelection);
}
if (handler == null)
{
return false;
}
ArrayList list = new ArrayList();
for (int i = 0; i < array.Length; i++)
{
if ((this.GetHandler(array[i]) == handler) && ((handler.GetComponentRules(array[i]) & rules) == rules))
{
list.Add(array[i]);
}
}
if (list.Count == 0)
{
return false;
}
array = list.ToArray();
bool flag = false;
this.dragComponents = array;
this.dragRules = rules;
this.dragHandler = handler;
string transactionName = GetTransactionName(rules, array);
this.dragTransaction = this.host.CreateTransaction(transactionName);
try
{
if (!handler.QueryBeginDrag(array, rules, initialX, initialY) || (this.dragHandler == null))
{
return flag;
}
try
{
flag = handler.BeginDrag(array, rules, initialX, initialY);
}
catch (Exception)
{
flag = false;
}
}
finally
{
if (!flag)
{
this.dragComponents = null;
this.dragRules = SelectionRules.None;
this.dragHandler = null;
if (this.dragTransaction != null)
{
this.dragTransaction.Commit();
this.dragTransaction = null;
}
}
}
return flag;
}
void ISelectionUIService.AssignSelectionUIHandler(object component, ISelectionUIHandler handler)
{
ISelectionUIHandler handler2 = (ISelectionUIHandler) this.selectionHandlers[component];
if (handler2 != null)
{
if (handler != handler2)
{
throw new InvalidOperationException();
}
}
else
{
this.selectionHandlers[component] = handler;
if ((this.selSvc != null) && this.selSvc.GetComponentSelected(component))
{
SelectionUIItem item = new SelectionUIItem(this, component);
this.selectionItems[component] = item;
this.UpdateWindowRegion();
item.Invalidate();
}
}
}
public SelectionUIItem(SelectionUIService selUIsvc, object component)
{
this.selUIsvc = selUIsvc;
this.component = component;
this.selectionStyle = SelectionStyles.Selected;
this.handler = selUIsvc.GetHandler(component);
this.sizes = inactiveSizeArray;
this.cursors = inactiveCursorArray;
IComponent component2 = component as IComponent;
if (component2 != null)
{
ControlDesigner designer = selUIsvc.host.GetDesigner(component2) as ControlDesigner;
if (designer != null)
{
this.control = designer.Control;
}
}
this.UpdateRules();
this.UpdateGrabSettings();
this.UpdateSize();
}
