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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QGRAPHICSLAYOUT_P_H
#define QGRAPHICSLAYOUT_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of other Qt classes. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtCore/qglobal.h>
#if !defined(QT_NO_GRAPHICSVIEW) || (QT_EDITION & QT_MODULE_GRAPHICSVIEW) != QT_MODULE_GRAPHICSVIEW
#include "qgraphicslayout.h"
#include "qgraphicslayoutitem_p.h"
#include <QtGui/qstyle.h>
#include <QtGui/qwidget.h>
#include <QtGui/qstyleoption.h>
QT_BEGIN_NAMESPACE
class QGraphicsLayoutItem;
class QGraphicsWidget;
#ifdef QT_DEBUG
inline bool qt_graphicsLayoutDebug()
{
static int checked_env = -1;
if(checked_env == -1)
checked_env = !!qgetenv("QT_GRAPHICSLAYOUT_DEBUG").toInt();
return checked_env;
}
#endif
class QLayoutStyleInfo
{
public:
inline QLayoutStyleInfo() { invalidate(); }
inline QLayoutStyleInfo(QStyle *style, QWidget *widget)
: m_valid(true), m_style(style), m_widget(widget)
{
Q_ASSERT(style);
if (widget) //###
m_styleOption.initFrom(widget);
m_defaultSpacing[0] = style->pixelMetric(QStyle::PM_LayoutHorizontalSpacing);
m_defaultSpacing[1] = style->pixelMetric(QStyle::PM_LayoutVerticalSpacing);
}
inline void invalidate() { m_valid = false; m_style = 0; m_widget = 0; }
inline QStyle *style() const { return m_style; }
inline QWidget *widget() const { return m_widget; }
inline bool operator==(const QLayoutStyleInfo &other)
{ return m_style == other.m_style && m_widget == other.m_widget; }
inline bool operator!=(const QLayoutStyleInfo &other)
{ return !(*this == other); }
inline void setDefaultSpacing(Qt::Orientation o, qreal spacing){
if (spacing >= 0)
m_defaultSpacing[o - 1] = spacing;
}
inline qreal defaultSpacing(Qt::Orientation o) const {
return m_defaultSpacing[o - 1];
}
inline qreal perItemSpacing(QSizePolicy::ControlType control1,
QSizePolicy::ControlType control2,
Qt::Orientation orientation) const
{
Q_ASSERT(style());
return style()->layoutSpacing(control1, control2, orientation, &m_styleOption, widget());
}
private:
bool m_valid;
QStyle *m_style;
QWidget *m_widget;
QStyleOption m_styleOption;
qreal m_defaultSpacing[2];
};
class Q_AUTOTEST_EXPORT QGraphicsLayoutPrivate : public QGraphicsLayoutItemPrivate
{
Q_DECLARE_PUBLIC(QGraphicsLayout)
public:
QGraphicsLayoutPrivate() : QGraphicsLayoutItemPrivate(0, true), left(-1.0), top(-1.0), right(-1.0), bottom(-1.0),
activated(true) { }
void reparentChildItems(QGraphicsItem *newParent);
void getMargin(qreal *result, qreal userMargin, QStyle::PixelMetric pm) const;
Qt::LayoutDirection visualDirection() const;
void addChildLayoutItem(QGraphicsLayoutItem *item);
void activateRecursive(QGraphicsLayoutItem *item);
qreal left, top, right, bottom;
bool activated;
};
QT_END_NAMESPACE
#endif //QT_NO_GRAPHICSVIEW
#endif
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