/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Designer of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qdesigner_widget_p.h"
#include "formwindowbase_p.h"
#include "grid_p.h"

#include <QtDesigner/QDesignerFormWindowInterface>
#include <QtGui/QPainter>
#include <QtWidgets/QStyle>
#include <QtWidgets/QStyleOption>
#include <QtGui/qevent.h>

QT_BEGIN_NAMESPACE

/* QDesignerDialog / QDesignerWidget are used to paint a grid on QDialog and QWidget main containers
 * and container extension pages.
 * The paint routines work as follows:
 * We need to clean the background here (to make the parent grid disappear in case we are a container page
 * and to make palette background settings take effect),
 * which would normally break style sheets with background settings.
 * So, we manually make the style paint after cleaning. On top comes the grid
 * In addition, this code works around
 * the QStyleSheetStyle setting Qt::WA_StyledBackground to false for subclasses of QWidget.
 */

QDesignerDialog::QDesignerDialog(QDesignerFormWindowInterface *fw, QWidget *parent) :
    QDialog(parent),
    m_formWindow(qobject_cast<qdesigner_internal::FormWindowBase*>(fw))
{
}

void QDesignerDialog::paintEvent(QPaintEvent *e)
{
    QPainter p(this);
    QStyleOption opt;
    opt.initFrom(this);
    p.fillRect(e->rect(), palette().brush(backgroundRole()));
    style()->drawPrimitive(QStyle::PE_Widget, &opt, &p, this);
    if (m_formWindow && m_formWindow->gridVisible())
        m_formWindow->designerGrid().paint(p, this, e);
}

QDesignerWidget::QDesignerWidget(QDesignerFormWindowInterface* formWindow, QWidget *parent)  :
    QWidget(parent),
    m_formWindow(qobject_cast<qdesigner_internal::FormWindowBase*>(formWindow))
{
}

QDesignerWidget::~QDesignerWidget()
{
}

QDesignerFormWindowInterface* QDesignerWidget::formWindow() const
{
    return m_formWindow;
}

void QDesignerWidget::paintEvent(QPaintEvent *e)
{
    QPainter p(this);
    QStyleOption opt;
    opt.initFrom(this);
    p.fillRect(e->rect(), palette().brush(backgroundRole()));
    style()->drawPrimitive(QStyle::PE_Widget, &opt, &p, this);
    if (m_formWindow && m_formWindow->gridVisible())
        m_formWindow->designerGrid().paint(p, this, e);
}

QT_END_NAMESPACE
