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Diffstat (limited to 'src/widgets/kernel/qlayoutitem.h')
| -rw-r--r-- | src/widgets/kernel/qlayoutitem.h | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/src/widgets/kernel/qlayoutitem.h b/src/widgets/kernel/qlayoutitem.h new file mode 100644 index 0000000000..a75011f3ff --- /dev/null +++ b/src/widgets/kernel/qlayoutitem.h @@ -0,0 +1,182 @@ +/**************************************************************************** +** +** Copyright (C) 2011 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. +** +** $QT_BEGIN_LICENSE:LGPL$ +** 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 Technology Preview License Agreement accompanying +** this package. +** +** 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. +** +** 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 |