/// <summary>
/// Returns a value indicating if the active context can copy the selection to the clipboard</summary>
/// <returns>True iff the active context can copy to the clipboard</returns>
public bool CanCopy()
{
IInstancingContext instancingContext = m_contextRegistry.GetActiveContext <IInstancingContext>();
return
(instancingContext != null &&
instancingContext.CanCopy());
}
/// <summary>
/// Checks whether the client can do the command, if it handles it</summary>
/// <param name="commandTag">Command to be done</param>
/// <returns>True iff client can do the command</returns>
bool ICommandClient.CanDoCommand(object commandTag)
{
bool canDo = false;
IInstancingContext instancingContext = m_contextRegistry.GetActiveContext <IInstancingContext>();
switch ((StandardCommand)commandTag)
{
case StandardCommand.EditCut:
canDo =
instancingContext != null &&
instancingContext.CanCopy() &&
instancingContext.CanDelete();
break;
case StandardCommand.EditDelete:
canDo =
instancingContext != null &&
instancingContext.CanDelete();
break;
case StandardCommand.EditCopy:
canDo =
instancingContext != null &&
instancingContext.CanCopy();
break;
case StandardCommand.EditPaste:
canDo =
instancingContext != null &&
CanPaste();
break;
}
return(canDo);
}
/// <summary>
/// Copies the active context's selection to the clipboard</summary>
public void Copy()
{
IInstancingContext instancingContext = m_contextRegistry.GetActiveContext <IInstancingContext>();
if (instancingContext != null &&
instancingContext.CanCopy())
{
object rawObject = instancingContext.Copy();
IDataObject dataObject = rawObject as IDataObject ?? new DataObject(rawObject);
OnCopying(EventArgs.Empty);
Clipboard = dataObject;
OnCopied(EventArgs.Empty);
}
}
