//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
// $NoKeywords: $
//=============================================================================//

#ifndef PHANDLE_H
#define PHANDLE_H

#ifdef _WIN32
#pragma once
#endif

#include "../vgui/VGUI.h"

namespace vgui {

class Panel;

//-----------------------------------------------------------------------------
// Purpose: Safe pointer class for handling Panel or derived panel classes
//-----------------------------------------------------------------------------
class PHandle {
   public:
    PHandle()
        : m_iPanelID(INVALID_PANEL) {
    }  // m_iSerialNumber(0), m_pListEntry(0) {}

    Panel *Get();
    Panel *Set(Panel *pPanel);
    Panel *Set(HPanel hPanel);

    operator Panel *() { return Get(); }
    Panel *operator->() { return Get(); }
    Panel *operator=(Panel *pPanel) { return Set(pPanel); }

    bool operator==(Panel *pPanel) { return (Get() == pPanel); }
    operator bool() { return Get() != 0; }

   private:
    HPanel m_iPanelID;
};

//-----------------------------------------------------------------------------
// Purpose: Safe pointer class to just convert between VPANEL's and PHandle
//-----------------------------------------------------------------------------
class VPanelHandle {
   public:
    VPanelHandle() : m_iPanelID(INVALID_PANEL) {}

    VPANEL Get();
    VPANEL Set(VPANEL pPanel);

    operator VPANEL() { return Get(); }
    VPANEL operator=(VPANEL pPanel) { return Set(pPanel); }

    bool operator==(VPANEL pPanel) { return (Get() == pPanel); }
    operator bool() { return Get() != 0; }

   private:
    HPanel m_iPanelID;
};

//-----------------------------------------------------------------------------
// Purpose: DHANDLE is a templated version of PHandle
//-----------------------------------------------------------------------------
template <class PanelType>
class DHANDLE : public PHandle {
   public:
    PanelType *Get() { return (PanelType *)PHandle::Get(); }
    PanelType *Set(PanelType *pPanel) {
        return (PanelType *)PHandle::Set(pPanel);
    }
    PanelType *Set(HPanel hPanel) { return (PanelType *)PHandle::Set(hPanel); }

    operator PanelType *() { return (PanelType *)PHandle::Get(); }
    PanelType *operator->() { return (PanelType *)PHandle::Get(); }
    PanelType *operator=(PanelType *pPanel) {
        return (PanelType *)PHandle::Set(pPanel);
    }
    bool operator==(Panel *pPanel) { return (PHandle::Get() == pPanel); }
    operator bool() { return PHandle::Get() != NULL; }
};

};  // namespace vgui

#endif  // PHANDLE_H