mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-16 19:32:07 +00:00
80 lines
2.8 KiB
C++
80 lines
2.8 KiB
C++
//
|
|
// EventTarget.h
|
|
//
|
|
// Library: XML
|
|
// Package: DOM
|
|
// Module: DOMEvents
|
|
//
|
|
// Definition of the DOM EventTarget interface.
|
|
//
|
|
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
|
|
// and Contributors.
|
|
//
|
|
// SPDX-License-Identifier: BSL-1.0
|
|
//
|
|
|
|
|
|
#ifndef DOM_EventTarget_INCLUDED
|
|
#define DOM_EventTarget_INCLUDED
|
|
|
|
|
|
#include "Poco/DOM/DOMObject.h"
|
|
#include "Poco/XML/XML.h"
|
|
#include "Poco/XML/XMLString.h"
|
|
|
|
|
|
namespace Poco
|
|
{
|
|
namespace XML
|
|
{
|
|
|
|
|
|
class EventListener;
|
|
class Event;
|
|
|
|
|
|
class XML_API EventTarget : public DOMObject
|
|
/// The EventTarget interface is implemented by all Nodes in an implementation
|
|
/// which supports the DOM Event Model. Therefore, this interface can be obtained
|
|
/// by using binding-specific casting methods on an instance of the Node interface.
|
|
/// The interface allows registration and removal of EventListeners on an EventTarget
|
|
/// and dispatch of events to that EventTarget.
|
|
{
|
|
public:
|
|
virtual void addEventListener(const XMLString & type, EventListener * listener, bool useCapture) = 0;
|
|
/// This method allows the registration of event listeners on
|
|
/// the event target. If an EventListener is added to an
|
|
/// EventTarget while it is processing an event, it will not
|
|
/// be triggered by the current actions but may be triggered
|
|
/// during a later stage of event flow, such as the bubbling phase.
|
|
/// If multiple identical EventListeners are registered on the same
|
|
/// EventTarget with the same parameters the duplicate instances are
|
|
/// discarded. They do not cause the EventListener to be called twice and since they are
|
|
/// discarded they do not need to be removed with the removeEventListener method.
|
|
|
|
virtual void removeEventListener(const XMLString & type, EventListener * listener, bool useCapture) = 0;
|
|
/// This method allows the removal of event listeners from the event
|
|
/// target. If an EventListener is removed from an EventTarget while it is
|
|
/// processing an event, it will not be triggered by the current actions.
|
|
/// EventListeners can never be invoked after being removed.
|
|
/// Calling removeEventListener with arguments which do not identify
|
|
/// any currently registered EventListener on the EventTarget has no effect.
|
|
|
|
virtual bool dispatchEvent(Event * evt) = 0;
|
|
/// This method allows the dispatch of events into the implementations
|
|
/// event model. Events dispatched in this manner will have the same capturing and
|
|
/// bubbling behavior as events dispatched directly by the
|
|
/// implementation. The target of the event is the EventTarget on
|
|
/// which dispatchEvent is called.
|
|
|
|
protected:
|
|
virtual ~EventTarget();
|
|
};
|
|
|
|
|
|
}
|
|
} // namespace Poco::XML
|
|
|
|
|
|
#endif // DOM_EventTarget_INCLUDED
|