/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qwindowstheme.h"
#include "qwindowsdialoghelpers.h"
#include "qwindowscontext.h"
#include "qt_windows.h"

#include <QtCore/QVariant>

QT_BEGIN_NAMESPACE

static inline bool booleanSystemParametersInfo(UINT what, bool defaultValue)
{
    BOOL result;
    if (SystemParametersInfo(what, 0, &result, 0))
        return result ? true : false;
    return defaultValue;
}

static inline bool dWordSystemParametersInfo(UINT what, DWORD defaultValue)
{
    DWORD result;
    if (SystemParametersInfo(what, 0, &result, 0))
        return result;
    return defaultValue;
}

QWindowsTheme::QWindowsTheme()
{
}

QVariant QWindowsTheme::themeHint(ThemeHint hint) const
{
    switch (hint) {
    case TextCursorWidth:
        return QVariant(int(dWordSystemParametersInfo(SPI_GETCARETWIDTH, 1u)));
    case DropShadow:
        return QVariant(booleanSystemParametersInfo(SPI_GETDROPSHADOW, false));
    case MaximumScrollBarDragDistance:
        return QVariant(qRound(qreal(QWindowsContext::instance()->defaultDPI()) * 1.375));
    }
    return QVariant();
}

bool QWindowsTheme::usePlatformNativeDialog(DialogType type) const
{
    return QWindowsDialogs::useHelper(type);
}

QPlatformDialogHelper *QWindowsTheme::createPlatformDialogHelper(DialogType type) const
{
    return QWindowsDialogs::createHelper(type);
}

QT_END_NAMESPACE