window_visible_scope.hpp

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/* /////////////////////////////////////////////////////////////////////////
 * File:        winstl/window_visible_scope.hpp (formerly winstl_window_visible_scope.h)
 *
 * Purpose:     Window visible-state scoping class.
 *
 * Created:     26th May 2004
 * Updated:     10th June 2006
 *
 * Home:        http://stlsoft.org/
 *
 * Copyright (c) 2004-2006, Matthew Wilson and Synesis Software
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * - Neither the name(s) of Matthew Wilson and Synesis Software nor the names of
 *   any contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * ////////////////////////////////////////////////////////////////////// */


/// \file winstl/window_visible_scope.hpp
///
/// Window visible-state scoping class.

#ifndef WINSTL_INCL_WINSTL_HPP_WINDOW_VISIBLE_SCOPE
#define WINSTL_INCL_WINSTL_HPP_WINDOW_VISIBLE_SCOPE

#ifndef STLSOFT_DOCUMENTATION_SKIP_SECTION
# define WINSTL_VER_WINSTL_HPP_WINDOW_VISIBLE_SCOPE_MAJOR       3
# define WINSTL_VER_WINSTL_HPP_WINDOW_VISIBLE_SCOPE_MINOR       2
# define WINSTL_VER_WINSTL_HPP_WINDOW_VISIBLE_SCOPE_REVISION    1
# define WINSTL_VER_WINSTL_HPP_WINDOW_VISIBLE_SCOPE_EDIT        29
#endif /* !STLSOFT_DOCUMENTATION_SKIP_SECTION */

/* /////////////////////////////////////////////////////////////////////////
 * Includes
 */

#ifndef WINSTL_INCL_WINSTL_H_WINSTL
# include <winstl/winstl.h>
#endif /* !WINSTL_INCL_WINSTL_H_WINSTL */
#ifndef WINSTL_INCL_WINSTL_HPP_WINDOW_ACCESS
# include <winstl/window_access.hpp>
#endif /* !WINSTL_INCL_WINSTL_HPP_WINDOW_ACCESS */

/* /////////////////////////////////////////////////////////////////////////
 * Namespace
 */

#ifndef _WINSTL_NO_NAMESPACE
# if defined(_STLSOFT_NO_NAMESPACE) || \
     defined(STLSOFT_DOCUMENTATION_SKIP_SECTION)
/* There is no stlsoft namespace, so must define ::winstl */
namespace winstl
{
# else
/* Define stlsoft::winstl_project */

namespace stlsoft
{

namespace winstl_project
{

# endif /* _STLSOFT_NO_NAMESPACE */
#endif /* !_WINSTL_NO_NAMESPACE */

/* /////////////////////////////////////////////////////////////////////////
 * Classes
 */

// window_visible_scope
/// Provides scoping of the visible status of a window.
///
/// This class provides scoping of the visible status of a window via the API
/// function ShowWindow().
class window_visible_scope
{
public:
    typedef window_visible_scope class_type;

// Construction
public:
    /// \brief Toggles the window visible state
    ///
    /// Takes a HWND and changes it's current visible-status, which is set back to
    /// the original state in the destructor.
    ///
    /// \param wnd The window whose visible state is to be controlled
    ss_explicit_k window_visible_scope(HWND wnd)
        : m_hwnd(wnd)
        , m_stateOnDtor(::IsWindowVisible(m_hwnd) ? SW_SHOW : SW_HIDE)
    {
        ::ShowWindow(m_hwnd, (SW_SHOW == m_stateOnDtor) ? SW_HIDE : SW_SHOW);
    }

#ifdef STLSOFT_CF_MEMBER_TEMPLATE_CTOR_SUPPORT
    /// \brief Toggles the window visible state
    ///
    /// Takes a HWND and changes it's current visible-status, which is set back to
    /// the original state in the destructor.
    ///
    /// \param wnd The window whose visible state is to be controlled
    template <ss_typename_param_k W>
    ss_explicit_k window_visible_scope(W &wnd)
        : m_hwnd(get_hwnd(wnd))
        , m_stateOnDtor(::IsWindowVisible(m_hwnd) ? SW_SHOW : SW_HIDE)
    {
        ::ShowWindow(m_hwnd, (SW_SHOW == m_stateOnDtor) ? SW_HIDE : SW_SHOW);
    }
#endif /* STLSOFT_CF_MEMBER_TEMPLATE_CTOR_SUPPORT */

    /// Modifies the window visible state
    ///
    /// \param wnd The window whose visible state is to be controlled
    /// \param stateOnCtor The state to set in the constructor
    /// \param stateOnDtor The state it is reset to in the destructor
    window_visible_scope(HWND wnd, ws_int_t stateOnCtor, ws_int_t stateOnDtor)
        : m_hwnd(wnd)
        , m_stateOnDtor(stateOnDtor)
    {
        ::ShowWindow(m_hwnd, stateOnCtor);
    }
#ifdef STLSOFT_CF_MEMBER_TEMPLATE_CTOR_SUPPORT
    /// Modifies the window visible state
    ///
    /// \param wnd The window whose visible state is to be controlled
    /// \param stateOnCtor The state to set in the constructor
    /// \param stateOnDtor The state it is reset to in the destructor
    template <ss_typename_param_k W>
    window_visible_scope(W &wnd, ws_int_t stateOnCtor, ws_int_t stateOnDtor)
        : m_hwnd(get_hwnd(wnd))
        , m_stateOnDtor(stateOnDtor)
    {
        ::ShowWindow(m_hwnd, stateOnCtor);
    }
#endif /* STLSOFT_CF_MEMBER_TEMPLATE_CTOR_SUPPORT */

    /// Resets the visible status
    ~window_visible_scope() stlsoft_throw_0()
    {
#ifdef STLSOFT_CF_USE_RAW_OFFSETOF_IN_STATIC_ASSERT
        WINSTL_STATIC_ASSERT(STLSOFT_RAW_OFFSETOF(class_type, m_hwnd) < STLSOFT_RAW_OFFSETOF(class_type, m_stateOnDtor));
#endif /* STLSOFT_CF_USE_RAW_OFFSETOF_IN_STATIC_ASSERT */

        ::ShowWindow(m_hwnd, m_stateOnDtor);
    }

// Members
private:
    HWND const      m_hwnd;
    ws_int_t const  m_stateOnDtor;

// Not to be implemented
private:
    window_visible_scope(window_visible_scope const &rhs);
    window_visible_scope const &operator =(window_visible_scope const &rhs);
};

////////////////////////////////////////////////////////////////////////////
// Unit-testing

#ifdef STLSOFT_UNITTEST
# include "./unittest/window_visible_scope_unittest_.h"
#endif /* STLSOFT_UNITTEST */

/* ////////////////////////////////////////////////////////////////////// */

#ifndef _WINSTL_NO_NAMESPACE
# if defined(_STLSOFT_NO_NAMESPACE) || \
     defined(STLSOFT_DOCUMENTATION_SKIP_SECTION)
} // namespace winstl
# else
} // namespace winstl_project
} // namespace stlsoft
# endif /* _STLSOFT_NO_NAMESPACE */
#endif /* !_WINSTL_NO_NAMESPACE */

/* ////////////////////////////////////////////////////////////////////// */

#endif /* WINSTL_INCL_WINSTL_HPP_WINDOW_VISIBLE_SCOPE */

/* ////////////////////////////////////////////////////////////////////// */