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Jan Arve Saether authored
This happened only when the size of the layout didn't change. Task-number: QTBUG-31570 Change-Id: Ia090c0062fa8fc3eb6f648592529ee8fcd025593 Reviewed-by:J-P Nurmi <jpnurmi@digia.com>
05e492cf
/******************************************************************************** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).** Contact: http://www.qt-project.org/legal**** This file is part of the Qt Quick Layouts 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 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 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, 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.**** 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.****** $QT_END_LICENSE$******************************************************************************/#ifndef QQUICKGRIDLAYOUTENGINE_P_H#define QQUICKGRIDLAYOUTENGINE_P_H//// W A R N I N G// -------------//// This file is not part of the Qt API. It exists for the convenience// of the graphics view layout classes. This header// file may change from version to version without notice, or even be removed.//// We mean it.//#include "qgridlayoutengine_p.h"#include "qquickitem.h"#include "qquicklayout_p.h"#include "qdebug.h"QT_BEGIN_NAMESPACEclass QQuickGridLayoutItem : public QGridLayoutItem {public: QQuickGridLayoutItem(QQuickItem *item, int row, int column, int rowSpan = 1, int columnSpan = 1, Qt::Alignment alignment = 0) : QGridLayoutItem(row, column, rowSpan, columnSpan, alignment), m_item(item), sizeHintCacheDirty(true), useFallbackToWidthOrHeight(true) {} typedef qreal (QQuickLayoutAttached::*SizeGetter)() const;7172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140
QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
{
Q_UNUSED(constraint); // Quick Layouts does not support constraint atm
return effectiveSizeHints()[which];
}
static void effectiveSizeHints_helper(QQuickItem *item, QSizeF *cachedSizeHints, QQuickLayoutAttached **info, bool useFallbackToWidthOrHeight);
static QLayoutPolicy::Policy effectiveSizePolicy_helper(QQuickItem *item, Qt::Orientation orientation, QQuickLayoutAttached *info);
QSizeF *effectiveSizeHints() const
{
if (!sizeHintCacheDirty)
return cachedSizeHints;
effectiveSizeHints_helper(m_item, cachedSizeHints, 0, useFallbackToWidthOrHeight);
useFallbackToWidthOrHeight = false;
sizeHintCacheDirty = false;
return cachedSizeHints;
}
void setCachedSizeHints(QSizeF *sizeHints)
{
for (int i = 0; i < Qt::NSizeHints; ++i) {
cachedSizeHints[i] = sizeHints[i];
}
sizeHintCacheDirty = false;
}
void invalidate()
{
quickLayoutDebug() << "engine::invalidate()";
sizeHintCacheDirty = true;
}
QLayoutPolicy::Policy sizePolicy(Qt::Orientation orientation) const
{
return effectiveSizePolicy_helper(m_item, orientation, attachedLayoutObject(m_item, false));
}
void setGeometry(const QRectF &rect)
{
const QRect r(rect.toRect());
const QSize newSize(r.size());
m_item->setPosition(r.topLeft());
QSizeF oldSize(m_item->width(), m_item->height());
if (newSize == oldSize) {
if (QQuickLayout *lay = qobject_cast<QQuickLayout *>(m_item))
if (lay->arrangementIsDirty())
lay->rearrange(newSize);
} else {
m_item->setSize(newSize);
}
}
QQuickItem *layoutItem() const { return m_item; }
QQuickItem *m_item;
private:
mutable QSizeF cachedSizeHints[Qt::NSizeHints];
mutable unsigned sizeHintCacheDirty : 1;
mutable unsigned useFallbackToWidthOrHeight : 1;
};
class QQuickGridLayoutEngine : public QGridLayoutEngine {
public:
QQuickGridLayoutEngine() : QGridLayoutEngine() {} //### not needed
int indexOf(QQuickItem *item) const {
141142143144145146147148149150151152153154155156157158159160161162163164
for (int i = 0; i < q_items.size(); ++i) {
if (item == static_cast<QQuickGridLayoutItem*>(q_items.at(i))->layoutItem())
return i;
}
return -1;
}
QQuickGridLayoutItem *findLayoutItem(QQuickItem *layoutItem) const
{
for (int i = q_items.count() - 1; i >= 0; --i) {
QQuickGridLayoutItem *item = static_cast<QQuickGridLayoutItem*>(q_items.at(i));
if (item->layoutItem() == layoutItem)
return item;
}
return 0;
}
};
QT_END_NAMESPACE
#endif // QQUICKGRIDLAYOUTENGINE_P_H