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240 lines
8.4 KiB
240 lines
8.4 KiB
15 years ago
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/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the QtGui module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial Usage
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Nokia.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QSIZEPOLICY_H
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#define QSIZEPOLICY_H
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#include <QtCore/qobject.h>
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QT_BEGIN_HEADER
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QT_BEGIN_NAMESPACE
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QT_MODULE(Gui)
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class QVariant;
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class Q_GUI_EXPORT QSizePolicy
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{
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Q_GADGET
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Q_ENUMS(Policy)
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private:
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enum SizePolicyMasks {
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HSize = 4,
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HMask = 0x0f,
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VMask = HMask << HSize,
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CTShift = 9,
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CTSize = 5,
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WFHShift = CTShift + CTSize,
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CTMask = ((0x1 << CTSize) - 1) << CTShift,
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UnusedShift = CTShift + CTSize,
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UnusedSize = 2
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};
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public:
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enum PolicyFlag {
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GrowFlag = 1,
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ExpandFlag = 2,
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ShrinkFlag = 4,
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IgnoreFlag = 8
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};
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enum Policy {
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Fixed = 0,
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Minimum = GrowFlag,
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Maximum = ShrinkFlag,
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Preferred = GrowFlag | ShrinkFlag,
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MinimumExpanding = GrowFlag | ExpandFlag,
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Expanding = GrowFlag | ShrinkFlag | ExpandFlag,
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Ignored = ShrinkFlag | GrowFlag | IgnoreFlag
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};
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enum ControlType {
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DefaultType = 0x00000001,
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ButtonBox = 0x00000002,
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CheckBox = 0x00000004,
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ComboBox = 0x00000008,
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Frame = 0x00000010,
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GroupBox = 0x00000020,
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Label = 0x00000040,
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Line = 0x00000080,
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LineEdit = 0x00000100,
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PushButton = 0x00000200,
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RadioButton = 0x00000400,
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Slider = 0x00000800,
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SpinBox = 0x00001000,
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TabWidget = 0x00002000,
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ToolButton = 0x00004000
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};
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Q_DECLARE_FLAGS(ControlTypes, ControlType)
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QSizePolicy() : data(0) { }
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// ### Qt 5: merge these two constructors (with type == DefaultType)
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QSizePolicy(Policy horizontal, Policy vertical)
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: data(horizontal | (vertical << HSize)) { }
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QSizePolicy(Policy horizontal, Policy vertical, ControlType type)
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: data(horizontal | (vertical << HSize)) { setControlType(type); }
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Policy horizontalPolicy() const { return static_cast<Policy>(data & HMask); }
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Policy verticalPolicy() const { return static_cast<Policy>((data & VMask) >> HSize); }
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ControlType controlType() const;
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void setHorizontalPolicy(Policy d) { data = (data & ~HMask) | d; }
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void setVerticalPolicy(Policy d) { data = (data & ~(HMask << HSize)) | (d << HSize); }
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void setControlType(ControlType type);
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Qt::Orientations expandingDirections() const {
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Qt::Orientations result;
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if (verticalPolicy() & ExpandFlag)
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result |= Qt::Vertical;
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if (horizontalPolicy() & ExpandFlag)
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result |= Qt::Horizontal;
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return result;
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}
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void setHeightForWidth(bool b) { data = b ? (data | (1 << 2*HSize)) : (data & ~(1 << 2*HSize)); }
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bool hasHeightForWidth() const { return data & (1 << 2*HSize); }
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bool operator==(const QSizePolicy& s) const { return data == s.data; }
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bool operator!=(const QSizePolicy& s) const { return data != s.data; }
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operator QVariant() const; // implemented in qabstractlayout.cpp
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int horizontalStretch() const { return data >> 24; }
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int verticalStretch() const { return (data >> 16) & 0xff; }
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void setHorizontalStretch(uchar stretchFactor) { data = (data&0x00ffffff) | (uint(stretchFactor)<<24); }
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void setVerticalStretch(uchar stretchFactor) { data = (data&0xff00ffff) | (uint(stretchFactor)<<16); }
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void transpose();
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#ifdef QT3_SUPPORT
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typedef Policy SizeType;
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#ifndef qdoc
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typedef Qt::Orientations ExpandData;
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enum {
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NoDirection = 0,
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Horizontally = 1,
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Vertically = 2,
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BothDirections = Horizontally | Vertically
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};
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#else
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enum ExpandData {
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NoDirection = 0x0,
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Horizontally = 0x1,
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Vertically = 0x2,
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BothDirections = 0x3
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};
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#endif // qdoc
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inline QT3_SUPPORT bool mayShrinkHorizontally() const
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{ return horizontalPolicy() & ShrinkFlag; }
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inline QT3_SUPPORT bool mayShrinkVertically() const { return verticalPolicy() & ShrinkFlag; }
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inline QT3_SUPPORT bool mayGrowHorizontally() const { return horizontalPolicy() & GrowFlag; }
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inline QT3_SUPPORT bool mayGrowVertically() const { return verticalPolicy() & GrowFlag; }
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inline QT3_SUPPORT Qt::Orientations expanding() const { return expandingDirections(); }
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QT3_SUPPORT_CONSTRUCTOR QSizePolicy(Policy hor, Policy ver, bool hfw)
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: data(hor | (ver<<HSize) | (hfw ? (1U<<2*HSize) : 0)) { }
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QT3_SUPPORT_CONSTRUCTOR QSizePolicy(Policy hor, Policy ver, uchar hors, uchar vers, bool hfw = false)
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: data(hor | (ver<<HSize) | (hfw ? (1U<<2*HSize) : 0)) {
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setHorizontalStretch(hors);
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setVerticalStretch(vers);
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}
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inline QT3_SUPPORT Policy horData() const { return static_cast<Policy>(data & HMask); }
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inline QT3_SUPPORT Policy verData() const { return static_cast<Policy>((data & VMask) >> HSize); }
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inline QT3_SUPPORT void setHorData(Policy d) { setHorizontalPolicy(d); }
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inline QT3_SUPPORT void setVerData(Policy d) { setVerticalPolicy(d); }
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inline QT3_SUPPORT uint horStretch() const { return horizontalStretch(); }
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inline QT3_SUPPORT uint verStretch() const { return verticalStretch(); }
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inline QT3_SUPPORT void setHorStretch(uchar sf) { setHorizontalStretch(sf); }
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inline QT3_SUPPORT void setVerStretch(uchar sf) { setVerticalStretch(sf); }
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#endif
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private:
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#ifndef QT_NO_DATASTREAM
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friend Q_GUI_EXPORT QDataStream &operator<<(QDataStream &, const QSizePolicy &);
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friend Q_GUI_EXPORT QDataStream &operator>>(QDataStream &, QSizePolicy &);
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#endif
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QSizePolicy(int i) : data(i) { }
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quint32 data;
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/* use bit flags instead, keep it here for improved readability for now
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quint32 horzPolicy : 4;
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quint32 vertPolicy : 4;
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quint32 hfw : 1;
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quint32 ctype : 5;
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quint32 wfh : 1;
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quint32 padding : 1; // we cannot use the highest bit
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quint32 horStretch : 8;
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quint32 verStretch : 8;
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*/
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};
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Q_DECLARE_OPERATORS_FOR_FLAGS(QSizePolicy::ControlTypes)
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#ifndef QT_NO_DATASTREAM
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// implemented in qlayout.cpp
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Q_GUI_EXPORT QDataStream &operator<<(QDataStream &, const QSizePolicy &);
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Q_GUI_EXPORT QDataStream &operator>>(QDataStream &, QSizePolicy &);
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#endif
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inline void QSizePolicy::transpose() {
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Policy hData = horizontalPolicy();
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Policy vData = verticalPolicy();
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uchar hStretch = uchar(horizontalStretch());
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uchar vStretch = uchar(verticalStretch());
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setHorizontalPolicy(vData);
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setVerticalPolicy(hData);
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setHorizontalStretch(vStretch);
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setVerticalStretch(hStretch);
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}
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QT_END_NAMESPACE
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QT_END_HEADER
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#endif // QSIZEPOLICY_H
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