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/****************************************************************************
**
** Copyright (C) 1993-2009 NVIDIA Corporation.
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt 3D Studio.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#pragma once
#include "Qt3DSEvent.h"
#include "Qt3DSMemory.h"
//==============================================================================
// Namespace
//==============================================================================
namespace Q3DStudio {
//==============================================================================
// Typedefs
//==============================================================================
typedef void (*TEventCallback)(void *inContextData, SEventCommand &ioEvent);
//==============================================================================
/**
* Manages the various events callbacks in the system. It fires the
* registered callbacks when an event was triggered.
*/
class CEventCallbacks
{
//==============================================================================
// Structs
//==============================================================================
protected:
struct SCallbackEntry
{
TEventCallback m_Function; ///< Callback function pointer
void *m_ContextData; ///< User data
};
typedef CArray<SCallbackEntry> TCallbackList; ///< Array of callbacks regisgtered
struct SEventCallbackEntry
{
SEventCallbackEntry()
: m_EventHash(0)
{
}
~SEventCallbackEntry() {}
TEventCommandHash m_EventHash; ///< The event of interest
TCallbackList m_Callbacks; ///< List of callbacks listening to this event
private: // Disabled Copy Construction
SEventCallbackEntry(const SEventCallbackEntry &);
SEventCallbackEntry &operator=(const SEventCallbackEntry &);
};
typedef CArray<SEventCallbackEntry *> TEventCallbacksList; ///< Array of events with callback
struct SElementCallbackEntry
{
SElementCallbackEntry()
: m_Element(NULL)
{
}
~SElementCallbackEntry()
{
FOR_ARRAY(SEventCallbackEntry *, theEntry, m_EventEntries)
Q3DStudio_delete(*theEntry, SEventCallbackEntry);
}
TElement *m_Element; ///< Element to monitor for event
TEventCallbacksList m_EventEntries; ///< List of events listened on this element
private: // Disabled Copy Construction
SElementCallbackEntry(const SElementCallbackEntry &);
SElementCallbackEntry &operator=(const SElementCallbackEntry &);
};
typedef CArray<SElementCallbackEntry *>
TElementCallbacksList; ///< Array of elements with callbacks
//==============================================================================
// Fields
//==============================================================================
protected:
TElementCallbacksList m_EventCallbacksList; ///< List of event callbacks
TCallbackList m_CallbackList;
//==============================================================================
// Methods
//==============================================================================
public: // Construction
CEventCallbacks();
~CEventCallbacks();
public: // Registration
void RegisterCallback(TElement *inElement, const TEventCommandHash inEventHash,
const TEventCallback inCallback, void *inContextData);
BOOL UnregisterCallback(TElement *inElement, const TEventCommandHash inEventHash,
const TEventCallback inCallback, void *inContextData, BOOL &outLast);
void UnregisterAllCallbacks();
public: // Operation
void FireCallbacks(SEventCommand &ioEvent);
protected:
void PerformCallbacks(TCallbackList &inCallbackList, SEventCommand &ioEvent);
private: // Disabled Copy Construction
CEventCallbacks(const CEventCallbacks &);
CEventCallbacks &operator=(const CEventCallbacks &);
};
} // namespace Q3DStudio
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