Long live Qt 4.5!

1 files changed, 182 insertions, 0 deletions

diff --git a/src/gui/kernel/qlayoutitem.h b/src/gui/kernel/qlayoutitem.h
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, 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 are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@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