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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtQuick module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QQUICKANCHORS_P_P_H
#define QQUICKANCHORS_P_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include "qquickanchors_p.h"
#include "qquickitemchangelistener_p.h"
#include <private/qobject_p.h>
QT_BEGIN_NAMESPACE
class QQuickAnchorLine
{
public:
QQuickAnchorLine() {}
QQuickAnchorLine(QQuickItem *i, QQuickAnchors::Anchor l) : item(i), anchorLine(l) {}
QQuickAnchorLine(QQuickItem *i, uint l)
: item(i)
, anchorLine(static_cast<QQuickAnchors::Anchor>(l))
{ Q_ASSERT(l < ((QQuickAnchors::BaselineAnchor << 1) - 1)); }
QQuickItem *item = nullptr;
QQuickAnchors::Anchor anchorLine = QQuickAnchors::InvalidAnchor;
};
inline bool operator==(const QQuickAnchorLine& a, const QQuickAnchorLine& b)
{
return a.item == b.item && a.anchorLine == b.anchorLine;
}
class QQuickAnchorsPrivate : public QObjectPrivate, public QQuickItemChangeListener
{
Q_DECLARE_PUBLIC(QQuickAnchors)
public:
QQuickAnchorsPrivate(QQuickItem *i)
: leftMargin(0)
, rightMargin(0)
, topMargin(0)
, bottomMargin(0)
, margins(0)
, vCenterOffset(0)
, hCenterOffset(0)
, baselineOffset(0)
, item(i)
, fill(nullptr)
, centerIn(nullptr)
, leftAnchorItem(nullptr)
, rightAnchorItem(nullptr)
, topAnchorItem(nullptr)
, bottomAnchorItem(nullptr)
, vCenterAnchorItem(nullptr)
, hCenterAnchorItem(nullptr)
, baselineAnchorItem(nullptr)
, leftAnchorLine(QQuickAnchors::InvalidAnchor)
, leftMarginExplicit(false)
, rightAnchorLine(QQuickAnchors::InvalidAnchor)
, rightMarginExplicit(false)
, topAnchorLine(QQuickAnchors::InvalidAnchor)
, topMarginExplicit(false)
, bottomAnchorLine(QQuickAnchors::InvalidAnchor)
, bottomMarginExplicit(false)
, vCenterAnchorLine(QQuickAnchors::InvalidAnchor)
, updatingMe(false)
, hCenterAnchorLine(QQuickAnchors::InvalidAnchor)
, inDestructor(false)
, baselineAnchorLine(QQuickAnchors::InvalidAnchor)
, centerAligned(true)
, usedAnchors(QQuickAnchors::InvalidAnchor)
, componentComplete(true)
, updatingFill(0)
, updatingCenterIn(0)
, updatingHorizontalAnchor(0)
, updatingVerticalAnchor(0)
{
}
void clearItem(QQuickItem *);
QQuickGeometryChange calculateDependency(QQuickItem *) const;
void addDepend(QQuickItem *);
void remDepend(QQuickItem *);
bool isItemComplete() const;
void setItemHeight(qreal);
void setItemWidth(qreal);
void setItemX(qreal);
void setItemY(qreal);
void setItemPos(const QPointF &);
void setItemSize(const QSizeF &);
void update();
void updateOnComplete();
void updateMe();
// QQuickItemGeometryListener interface
void itemGeometryChanged(QQuickItem *, QQuickGeometryChange, const QRectF &) override;
QQuickAnchorsPrivate *anchorPrivate() override { return this; }
bool checkHValid() const;
bool checkVValid() const;
bool checkHAnchorValid(QQuickAnchorLine anchor) const;
bool checkVAnchorValid(QQuickAnchorLine anchor) const;
bool calcStretch(QQuickItem *edge1Item, QQuickAnchors::Anchor edge1Line,
QQuickItem *edge2Item, QQuickAnchors::Anchor edge2Line,
qreal offset1, qreal offset2, QQuickAnchors::Anchor line, qreal &stretch) const;
bool isMirrored() const;
void updateHorizontalAnchors();
void updateVerticalAnchors();
void fillChanged();
void centerInChanged();
qreal leftMargin;
qreal rightMargin;
qreal topMargin;
qreal bottomMargin;
qreal margins;
qreal vCenterOffset;
qreal hCenterOffset;
qreal baselineOffset;
QQuickItem *item;
QQuickItem *fill;
QQuickItem *centerIn;
QQuickItem *leftAnchorItem;
QQuickItem *rightAnchorItem;
QQuickItem *topAnchorItem;
QQuickItem *bottomAnchorItem;
QQuickItem *vCenterAnchorItem;
QQuickItem *hCenterAnchorItem;
QQuickItem *baselineAnchorItem;
// The bit fields below are carefully laid out in chunks of 1 byte, so the compiler doesn't
// need to generate 2 loads (and combining shifts/ors) to create a single field.
QQuickAnchors::Anchor leftAnchorLine : 7;
uint leftMarginExplicit : 1;
QQuickAnchors::Anchor rightAnchorLine : 7;
uint rightMarginExplicit : 1;
QQuickAnchors::Anchor topAnchorLine : 7;
uint topMarginExplicit : 1;
QQuickAnchors::Anchor bottomAnchorLine : 7;
uint bottomMarginExplicit : 1;
QQuickAnchors::Anchor vCenterAnchorLine : 7;
uint updatingMe : 1;
QQuickAnchors::Anchor hCenterAnchorLine : 7;
uint inDestructor : 1;
QQuickAnchors::Anchor baselineAnchorLine : 7;
uint centerAligned : 1;
uint usedAnchors : 7; // QQuickAnchors::Anchors
uint componentComplete : 1;
// Instead of using a mostly empty bit field, we can stretch the following fields up to be full
// bytes. The advantage is that incrementing/decrementing does not need any combining ands/ors.
qint8 updatingFill;
qint8 updatingCenterIn;
qint8 updatingHorizontalAnchor;
qint8 updatingVerticalAnchor;
static inline QQuickAnchorsPrivate *get(QQuickAnchors *o) {
return static_cast<QQuickAnchorsPrivate *>(QObjectPrivate::get(o));
}
};
QT_END_NAMESPACE
Q_DECLARE_METATYPE(QQuickAnchorLine)
#endif
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