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Diffstat (limited to 'src/gui/kernel/qlayoutengine_p.h')
| -rw-r--r-- | src/gui/kernel/qlayoutengine_p.h | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/src/gui/kernel/qlayoutengine_p.h b/src/gui/kernel/qlayoutengine_p.h new file mode 100644 index 0000000..4a6b8bd --- /dev/null +++ b/src/gui/kernel/qlayoutengine_p.h @@ -0,0 +1,140 @@ +/**************************************************************************** +** +** 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 QLAYOUTENGINE_P_H +#define QLAYOUTENGINE_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 "QtGui/qlayoutitem.h" +#include "QtGui/qstyle.h" + +QT_BEGIN_NAMESPACE + +template <typename T> class QVector; + +struct QLayoutStruct +{ + inline void init(int stretchFactor = 0, int minSize = 0) { + stretch = stretchFactor; + minimumSize = sizeHint = minSize; + maximumSize = QLAYOUTSIZE_MAX; + expansive = false; + empty = true; + spacing = 0; + } + + int smartSizeHint() { + return (stretch > 0) ? minimumSize : sizeHint; + } + int effectiveSpacer(int uniformSpacer) const { + Q_ASSERT(uniformSpacer >= 0 || spacing >= 0); + return (uniformSpacer >= 0) ? uniformSpacer : spacing; + } + + // parameters + int stretch; + int sizeHint; + int maximumSize; + int minimumSize; + bool expansive; + bool empty; + int spacing; + + // temporary storage + bool done; + + // result + int pos; + int size; +}; + + +Q_GUI_EXPORT void qGeomCalc(QVector<QLayoutStruct> &chain, int start, int count, + int pos, int space, int spacer = -1); +Q_GUI_EXPORT QSize qSmartMinSize(const QSize &sizeHint, const QSize &minSizeHint, + const QSize &minSize, const QSize &maxSize, + const QSizePolicy &sizePolicy); +Q_GUI_EXPORT QSize qSmartMinSize(const QWidgetItem *i); +Q_GUI_EXPORT QSize qSmartMinSize(const QWidget *w); +Q_GUI_EXPORT QSize qSmartMaxSize(const QSize &sizeHint, + const QSize &minSize, const QSize &maxSize, + const QSizePolicy &sizePolicy, Qt::Alignment align = 0); +Q_GUI_EXPORT QSize qSmartMaxSize(const QWidgetItem *i, Qt::Alignment align = 0); +Q_GUI_EXPORT QSize qSmartMaxSize(const QWidget *w, Qt::Alignment align = 0); + +Q_GUI_EXPORT int qSmartSpacing(const QLayout *layout, QStyle::PixelMetric pm); + +/* + Modify total maximum (max), total expansion (exp), and total empty + when adding boxmax/boxexp. + + Expansive boxes win over non-expansive boxes. + Non-empty boxes win over empty boxes. +*/ +static inline void qMaxExpCalc(int & max, bool &exp, bool &empty, + int boxmax, bool boxexp, bool boxempty) +{ + if (exp) { + if (boxexp) + max = qMax(max, boxmax); + } else { + if (boxexp || (empty && (!boxempty || max == 0))) + max = boxmax; + else if (empty == boxempty) + max = qMin(max, boxmax); + } + exp = exp || boxexp; + empty = empty && boxempty; +} + +QT_END_NAMESPACE + +#endif // QLAYOUTENGINE_P_H |