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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#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 <QtWidgets/private/qtwidgetsglobal_p.h>
#include "qgraphicslayout.h"
#include "qgraphicslayoutitem_p.h"
#include <QtWidgets/qstyle.h>
#include <QtWidgets/qwidget.h>
#include <QtWidgets/qstyleoption.h>
QT_REQUIRE_CONFIG(graphicsview);
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 = !!qEnvironmentVariableIntValue("QT_GRAPHICSLAYOUT_DEBUG");
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_styleOption);
m_defaultSpacing[1] = style->pixelMetric(QStyle::PM_LayoutVerticalSpacing, &m_styleOption);
}
inline void invalidate() { m_valid = false; m_style = nullptr; m_widget = nullptr; }
inline QStyle *style() const { return m_style; }
inline QWidget *widget() const { return m_widget; }
inline bool operator==(const QLayoutStyleInfo &other) const
{ return m_style == other.m_style && m_widget == other.m_widget; }
inline bool operator!=(const QLayoutStyleInfo &other) const
{ return !(*this == other); }
inline void setDefaultSpacing(Qt::Orientation o, qreal spacing){
if (spacing >= 0)
m_defaultSpacing[int(o) - 1] = spacing;
}
inline qreal defaultSpacing(Qt::Orientation o) const {
return m_defaultSpacing[int(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(nullptr, 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
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