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+/****************************************************************************
+**
+** Copyright (C) 2010 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial Usage
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Nokia.
+**
+** 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.
+**
+** 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.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QLAYOUTITEM_H
+#define QLAYOUTITEM_H
+
+#include <QtGui/qsizepolicy.h>
+#include <QtCore/qrect.h>
+
+#include <limits.h>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+QT_MODULE(Gui)
+
+static const int QLAYOUTSIZE_MAX = INT_MAX/256/16;
+
+class QLayout;
+class QLayoutItem;
+class QSpacerItem;
+class QWidget;
+class QSize;
+
+class Q_GUI_EXPORT QLayoutItem
+{
+public:
+ inline explicit QLayoutItem(Qt::Alignment alignment = 0);
+ virtual ~QLayoutItem();
+ virtual QSize sizeHint() const = 0;
+ virtual QSize minimumSize() const = 0;
+ virtual QSize maximumSize() const = 0;
+ virtual Qt::Orientations expandingDirections() const = 0;
+ virtual void setGeometry(const QRect&) = 0;
+ virtual QRect geometry() const = 0;
+ virtual bool isEmpty() const = 0;
+ virtual bool hasHeightForWidth() const;
+ virtual int heightForWidth(int) const;
+ virtual int minimumHeightForWidth(int) const;
+ virtual void invalidate();
+
+ virtual QWidget *widget();
+ virtual QLayout *layout();
+ virtual QSpacerItem *spacerItem();
+
+ Qt::Alignment alignment() const { return align; }
+ void setAlignment(Qt::Alignment a);
+ QSizePolicy::ControlTypes controlTypes() const;
+
+protected:
+ Qt::Alignment align;
+};
+
+inline QLayoutItem::QLayoutItem(Qt::Alignment aalignment)
+ : align(aalignment) { }
+
+class Q_GUI_EXPORT QSpacerItem : public QLayoutItem
+{
+public:
+ QSpacerItem(int w, int h,
+ QSizePolicy::Policy hData = QSizePolicy::Minimum,
+ QSizePolicy::Policy vData = QSizePolicy::Minimum)
+ : width(w), height(h), sizeP(hData, vData) { }
+ void changeSize(int w, int h,
+ QSizePolicy::Policy hData = QSizePolicy::Minimum,
+ QSizePolicy::Policy vData = QSizePolicy::Minimum);
+ QSize sizeHint() const;
+ QSize minimumSize() const;
+ QSize maximumSize() const;
+ Qt::Orientations expandingDirections() const;
+ bool isEmpty() const;
+ void setGeometry(const QRect&);
+ QRect geometry() const;
+ QSpacerItem *spacerItem();
+
+private:
+ int width;
+ int height;
+ QSizePolicy sizeP;
+ QRect rect;
+};
+
+class Q_GUI_EXPORT QWidgetItem : public QLayoutItem
+{
+ Q_DISABLE_COPY(QWidgetItem)
+
+public:
+ explicit QWidgetItem(QWidget *w) : wid(w) { }
+ QSize sizeHint() const;
+ QSize minimumSize() const;
+ QSize maximumSize() const;
+ Qt::Orientations expandingDirections() const;
+ bool isEmpty() const;
+ void setGeometry(const QRect&);
+ QRect geometry() const;
+ virtual QWidget *widget();
+
+ bool hasHeightForWidth() const;
+ int heightForWidth(int) const;
+
+protected:
+ QWidget *wid;
+};
+
+class Q_GUI_EXPORT QWidgetItemV2 : public QWidgetItem
+{
+public:
+ explicit QWidgetItemV2(QWidget *widget);
+ ~QWidgetItemV2();
+
+ QSize sizeHint() const;
+ QSize minimumSize() const;
+ QSize maximumSize() const;
+ int heightForWidth(int width) const;
+
+private:
+ enum { Dirty = -123, HfwCacheMaxSize = 3 };
+
+ inline bool useSizeCache() const;
+ void updateCacheIfNecessary() const;
+ inline void invalidateSizeCache() {
+ q_cachedMinimumSize.setWidth(Dirty);
+ q_hfwCacheSize = 0;
+ }
+
+ mutable QSize q_cachedMinimumSize;
+ mutable QSize q_cachedSizeHint;
+ mutable QSize q_cachedMaximumSize;
+ mutable QSize q_cachedHfws[HfwCacheMaxSize];
+ mutable short q_firstCachedHfw;
+ mutable short q_hfwCacheSize;
+ void *d;
+
+ friend class QWidgetPrivate;
+
+ Q_DISABLE_COPY(QWidgetItemV2)
+};
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif // QLAYOUTITEM_H