Add Chromium-only Blender WebEngine parity work

blender-5.2.0/intern/ghost/GHOST_IEventConsumer.hh

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+/* SPDX-FileCopyrightText: 2001-2002 NaN Holding BV. All rights reserved.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later */
+
+/** \file
+ * \ingroup GHOST
+ * Declaration of GHOST_IEventConsumer interface class.
+ */
+
+#pragma once
+
+#include "GHOST_IEvent.hh"
+
+/**
+ * Interface class for objects interested in receiving events.
+ * Objects interested in events should inherit this class and implement the
+ * processEvent() method. They should then be registered with the system that
+ * they want to receive events. The system will call the processEvent() method
+ * for every installed event consumer to pass events.
+ * \see GHOST_ISystem#addEventConsumer
+ */
+class GHOST_IEventConsumer {
+ public:
+  /**
+   * Destructor.
+   */
+  virtual ~GHOST_IEventConsumer() = default;
+
+  /**
+   * This method is called by the system when it has events to dispatch.
+   * \see GHOST_ISystem#dispatchEvents
+   * \param event: The event that can be handled or ignored.
+   * \return Indication as to whether the event was handled.
+   */
+  virtual bool processEvent(const GHOST_IEvent *event) = 0;
+
+  MEM_CXX_CLASS_ALLOC_FUNCS("GHOST:GHOST_IEventConsumer")
+};