public CommandHandlerWrapper GetCommandHandler(CommandDefinitionBase commandDefinition)
{
CommandHandlerWrapper commandHandler;
var shell = IoC.Get<IShell>();
var activeItemViewModel = shell.ActiveLayoutItem;
if (activeItemViewModel != null)
{
commandHandler = GetCommandHandlerForLayoutItem(commandDefinition, activeItemViewModel);
if (commandHandler != null)
return commandHandler;
}
var activeDocumentViewModel = shell.ActiveItem;
if (activeDocumentViewModel != null && !Equals(activeDocumentViewModel, activeItemViewModel))
{
commandHandler = GetCommandHandlerForLayoutItem(commandDefinition, activeDocumentViewModel);
if (commandHandler != null)
return commandHandler;
}
// If none of the objects in the DataContext hierarchy handle the command,
// fallback to the global handler.
if (!_globalCommandHandlerWrappers.TryGetValue(commandDefinition.GetType(), out commandHandler))
return null;
return commandHandler;
}
public CommandHandlerWrapper GetCommandHandler(CommandDefinitionBase commandDefinition)
{
CommandHandlerWrapper commandHandler;
var activeItemViewModel = IoC.Get<IShell>().ActiveLayoutItem;
if (activeItemViewModel != null)
{
var activeItemView = ViewLocator.LocateForModel(activeItemViewModel, null, null);
var activeItemWindow = Window.GetWindow(activeItemView);
if (activeItemWindow != null)
{
var startElement = FocusManager.GetFocusedElement(activeItemWindow);
// First, we look at the currently focused element, and iterate up through
// the tree, giving each DataContext a chance to handle the command.
commandHandler = FindCommandHandlerInVisualTree(commandDefinition, startElement);
if (commandHandler != null)
return commandHandler;
}
}
// If none of the objects in the DataContext hierarchy handle the command,
// fallback to the global handler.
if (!_globalCommandHandlerWrappers.TryGetValue(commandDefinition.GetType(), out commandHandler))
return null;
return commandHandler;
}
public CommandHandlerWrapper GetCommandHandler(CommandDefinitionBase commandDefinition)
{
CommandHandlerWrapper commandHandler;
var activeItemViewModel = IoC.Get <IShell>().ActiveLayoutItem;
if (activeItemViewModel != null)
{
var activeItemView = ViewLocator.LocateForModel(activeItemViewModel, null, null);
var activeItemWindow = Window.GetWindow(activeItemView);
if (activeItemWindow != null)
{
var startElement = FocusManager.GetFocusedElement(activeItemWindow);
// First, we look at the currently focused element, and iterate up through
// the tree, giving each DataContext a chance to handle the command.
commandHandler = FindCommandHandlerInVisualTree(commandDefinition, startElement);
if (commandHandler != null)
{
return(commandHandler);
}
}
}
// If none of the objects in the DataContext hierarchy handle the command,
// fallback to the global handler.
if (!_globalCommandHandlerWrappers.TryGetValue(commandDefinition.GetType(), out commandHandler))
{
return(null);
}
return(commandHandler);
}
private CommandHandlerWrapper FindCommandHandlerInVisualTree(CommandDefinitionBase commandDefinition, IInputElement target)
{
var visualObject = target as DependencyObject;
if (visualObject == null)
{
return(null);
}
object previousDataContext = null;
do
{
var frameworkElement = visualObject as FrameworkElement;
if (frameworkElement != null)
{
var dataContext = frameworkElement.DataContext;
if (dataContext != null && !ReferenceEquals(dataContext, previousDataContext))
{
if (dataContext is ICommandRerouter)
{
var commandRerouter = (ICommandRerouter)dataContext;
var commandTarget = commandRerouter.GetHandler(commandDefinition);
if (commandTarget != null)
{
if (IsCommandHandlerForCommandDefinitionType(commandTarget, commandDefinition.GetType()))
{
return(CreateCommandHandlerWrapper(commandDefinition.GetType(), commandTarget));
}
throw new InvalidOperationException("This object does not handle the specified command definition.");
}
}
if (IsCommandHandlerForCommandDefinitionType(dataContext, commandDefinition.GetType()))
{
return(CreateCommandHandlerWrapper(commandDefinition.GetType(), dataContext));
}
previousDataContext = dataContext;
}
}
visualObject = VisualTreeHelper.GetParent(visualObject);
} while (visualObject != null);
return(null);
}
public CommandHandlerWrapper GetCommandHandler(CommandDefinitionBase commandDefinition)
{
CommandHandlerWrapper commandHandler;
var shell = IoC.Get <IShell>();
var activeItemViewModel = shell.ActiveLayoutItem;
if (activeItemViewModel != null)
{
commandHandler = GetCommandHandlerForLayoutItem(commandDefinition, activeItemViewModel);
if (commandHandler != null)
{
return(commandHandler);
}
}
var activeDocumentViewModel = shell.ActiveItem;
if (activeDocumentViewModel != null && !Equals(activeDocumentViewModel, activeItemViewModel))
{
commandHandler = GetCommandHandlerForLayoutItem(commandDefinition, activeDocumentViewModel);
if (commandHandler != null)
{
return(commandHandler);
}
}
// If none of the objects in the DataContext hierarchy handle the command,
// fallback to the global handler.
if (!_globalCommandHandlerWrappers.TryGetValue(commandDefinition.GetType(), out commandHandler))
{
return(null);
}
return(commandHandler);
}
private CommandHandlerWrapper FindCommandHandlerInVisualTree(CommandDefinitionBase commandDefinition, IInputElement target)
{
var visualObject = target as DependencyObject;
if (visualObject == null)
return null;
object previousDataContext = null;
do
{
var frameworkElement = visualObject as FrameworkElement;
if (frameworkElement != null)
{
var dataContext = frameworkElement.DataContext;
if (dataContext != null && !ReferenceEquals(dataContext, previousDataContext))
{
if (dataContext is ICommandRerouter)
{
var commandRerouter = (ICommandRerouter) dataContext;
var commandTarget = commandRerouter.GetHandler(commandDefinition);
if (commandTarget != null)
{
if (IsCommandHandlerForCommandDefinitionType(commandTarget, commandDefinition.GetType()))
return CreateCommandHandlerWrapper(commandDefinition.GetType(), commandTarget);
throw new InvalidOperationException("This object does not handle the specified command definition.");
}
}
if (IsCommandHandlerForCommandDefinitionType(dataContext, commandDefinition.GetType()))
return CreateCommandHandlerWrapper(commandDefinition.GetType(), dataContext);
previousDataContext = dataContext;
}
}
visualObject = VisualTreeHelper.GetParent(visualObject);
} while (visualObject != null);
return null;
}