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00001 /**************************************************************************** 00002 ** $Id: qt/qsizepolicy.h 3.3.8 edited Jan 11 14:46 $ 00003 ** 00004 ** Definition of the QSizePolicy class 00005 ** 00006 ** Created : 980929 00007 ** 00008 ** Copyright (C) 1998-2007 Trolltech ASA. All rights reserved. 00009 ** 00010 ** This file is part of the kernel module of the Qt GUI Toolkit. 00011 ** 00012 ** This file may be distributed under the terms of the Q Public License 00013 ** as defined by Trolltech ASA of Norway and appearing in the file 00014 ** LICENSE.QPL included in the packaging of this file. 00015 ** 00016 ** This file may be distributed and/or modified under the terms of the 00017 ** GNU General Public License version 2 as published by the Free Software 00018 ** Foundation and appearing in the file LICENSE.GPL included in the 00019 ** packaging of this file. 00020 ** 00021 ** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition 00022 ** licenses may use this file in accordance with the Qt Commercial License 00023 ** Agreement provided with the Software. 00024 ** 00025 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE 00026 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 00027 ** 00028 ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for 00029 ** information about Qt Commercial License Agreements. 00030 ** See http://www.trolltech.com/qpl/ for QPL licensing information. 00031 ** See http://www.trolltech.com/gpl/ for GPL licensing information. 00032 ** 00033 ** Contact info@trolltech.com if any conditions of this licensing are 00034 ** not clear to you. 00035 ** 00036 **********************************************************************/ 00037 00038 #ifndef QSIZEPOLICY_H 00039 #define QSIZEPOLICY_H 00040 00041 #ifndef QT_H 00042 #include "qglobal.h" 00043 #endif // QT_H 00044 00045 // Documentation is in qabstractlayout.cpp. 00046 00047 class Q_EXPORT QSizePolicy 00048 { 00049 private: 00050 enum SizePolicy_Internal { HSize = 6, HMask = 0x3f, VMask = HMask << HSize, 00051 MayGrow = 1, ExpMask = 2, MayShrink = 4 }; 00052 public: 00053 enum SizeType { Fixed = 0, 00054 Minimum = MayGrow, 00055 Maximum = MayShrink, 00056 Preferred = MayGrow | MayShrink, 00057 MinimumExpanding = MayGrow | ExpMask, 00058 Expanding = MayGrow | MayShrink | ExpMask, 00059 Ignored = ExpMask /* magic value */ }; 00060 00061 enum ExpandData { NoDirection = 0, 00062 Horizontally = 1, 00063 Vertically = 2, 00064 #ifndef QT_NO_COMPAT 00065 Horizontal = Horizontally, 00066 Vertical = Vertically, 00067 #endif 00068 BothDirections = Horizontally | Vertically }; 00069 00070 QSizePolicy() : data( 0 ) { } 00071 00072 QSizePolicy( SizeType hor, SizeType ver, bool hfw = FALSE ) 00073 : data( hor | (ver<<HSize) | (hfw ? (Q_UINT32)(1<<2*HSize) : 0) ) { } 00074 QSizePolicy( SizeType hor, SizeType ver, uchar hors, uchar vers, bool hfw = FALSE ); 00075 00076 SizeType horData() const { return (SizeType)( data & HMask ); } 00077 SizeType verData() const { return (SizeType)( (data & VMask) >> HSize ); } 00078 00079 bool mayShrinkHorizontally() const { return horData() & MayShrink || horData() == Ignored; } 00080 bool mayShrinkVertically() const { return verData() & MayShrink || verData() == Ignored; } 00081 bool mayGrowHorizontally() const { return horData() & MayGrow || horData() == Ignored; } 00082 bool mayGrowVertically() const { return verData() & MayGrow || verData() == Ignored; } 00083 00084 ExpandData expanding() const 00085 { 00086 return (ExpandData)( (int)(verData() & ExpMask ? Vertically : 0) | 00087 (int)(horData() & ExpMask ? Horizontally : 0) ); 00088 } 00089 00090 void setHorData( SizeType d ) { data = (Q_UINT32)(data & ~HMask) | d; } 00091 void setVerData( SizeType d ) { data = (Q_UINT32)(data & ~(HMask << HSize)) | 00092 (d << HSize); } 00093 00094 void setHeightForWidth( bool b ) { data = b ? (Q_UINT32)( data | ( 1 << 2*HSize ) ) 00095 : (Q_UINT32)( data & ~( 1 << 2*HSize ) ); } 00096 bool hasHeightForWidth() const { return data & ( 1 << 2*HSize ); } 00097 00098 bool operator==( const QSizePolicy& s ) const { return data == s.data; } 00099 bool operator!=( const QSizePolicy& s ) const { return data != s.data; } 00100 00101 00102 uint horStretch() const { return data >> 24; } 00103 uint verStretch() const { return (data >> 16) & 0xff; } 00104 void setHorStretch( uchar sf ) { data = (data&0x00ffffff) | (uint(sf)<<24); } 00105 void setVerStretch( uchar sf ) { data = (data&0xff00ffff) | (uint(sf)<<16); } 00106 inline void transpose(); 00107 00108 private: 00109 QSizePolicy( int i ) : data( (Q_UINT32)i ) { } 00110 00111 Q_UINT32 data; 00112 }; 00113 00114 inline QSizePolicy::QSizePolicy( SizeType hor, SizeType ver, uchar hors, uchar vers, bool hfw ) 00115 : data( hor | (ver<<HSize) | (hfw ? (Q_UINT32)(1<<2*HSize) : 0) ) { 00116 setHorStretch( hors ); 00117 setVerStretch( vers ); 00118 } 00119 00120 inline void QSizePolicy::transpose() { 00121 *this = QSizePolicy( verData(), horData(), verStretch(), horStretch(), 00122 hasHeightForWidth() ); 00123 } 00124 00125 #endif // QSIZEPOLICY_H