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authorTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-07-10 15:17:53 -0500
committerTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-07-10 15:17:53 -0500
commitdda8474928bd7276e1fad8fb7a601e7c83ff2bc2 (patch)
tree7f83910598b33b12730035f086df20b5a53ab99c /tqtinterface/qt4/src/kernel/tqsize.cpp
parent6260b6178868c03aab1644bf93b0ef043654bdb0 (diff)
downloadexperimental-dda8474928bd7276e1fad8fb7a601e7c83ff2bc2.tar.gz
experimental-dda8474928bd7276e1fad8fb7a601e7c83ff2bc2.zip
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+/****************************************************************************
+**
+** Implementation of TQSize class
+**
+** Created : 931028
+**
+** Copyright (C) 2010 Timothy Pearson and (C) 1992-2008 Trolltech ASA.
+**
+** This file is part of the kernel module of the TQt GUI Toolkit.
+**
+** This file may be used under the terms of the GNU General
+** Public License versions 2.0 or 3.0 as published by the Free
+** Software Foundation and appearing in the files LICENSE.GPL2
+** and LICENSE.GPL3 included in the packaging of this file.
+** Alternatively you may (at your option) use any later version
+** of the GNU General Public License if such license has been
+** publicly approved by Trolltech ASA (or its successors, if any)
+** and the KDE Free TQt Foundation.
+**
+** Please review the following information to ensure GNU General
+** Public Licensing requirements will be met:
+** http://trolltech.com/products/qt/licenses/licensing/opensource/.
+** If you are unsure which license is appropriate for your use, please
+** review the following information:
+** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
+** or contact the sales department at sales@trolltech.com.
+**
+** This file may be used under the terms of the Q Public License as
+** defined by Trolltech ASA and appearing in the file LICENSE.TQPL
+** included in the packaging of this file. Licensees holding valid TQt
+** Commercial licenses may use this file in accordance with the TQt
+** Commercial License Agreement provided with the Software.
+**
+** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
+** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
+** herein.
+**
+**********************************************************************/
+
+#include "tqsize.h"
+#include "tqdatastream.h"
+
+#ifdef USE_QT4
+
+#else // USE_QT4
+
+/*!
+ \class TQSize
+ \brief The TQSize class defines the size of a two-dimensional object.
+
+ \ingroup images
+ \ingroup graphics
+
+ A size is specified by a width and a height.
+
+ The coordinate type is TQCOORD (defined in \c <tqwindowdefs.h> as \c int).
+ The minimum value of TQCOORD is TQCOORD_MIN (-2147483648) and the maximum
+ value is TQCOORD_MAX (2147483647).
+
+ The size can be set in the constructor and changed with setWidth()
+ and setHeight(), or using operator+=(), operator-=(), operator*=()
+ and operator/=(), etc. You can swap the width and height with
+ transpose(). You can get a size which holds the maximum height and
+ width of two sizes using expandedTo(), and the minimum height and
+ width of two sizes using boundedTo().
+
+
+ \sa TQPoint, TQRect
+*/
+
+
+/*****************************************************************************
+ TQSize member functions
+ *****************************************************************************/
+
+/*!
+ \fn TQSize::TQSize()
+ Constructs a size with invalid (negative) width and height.
+*/
+
+/*!
+ \fn TQSize::TQSize( int w, int h )
+ Constructs a size with width \a w and height \a h.
+*/
+
+/*!
+ \fn bool TQSize::isNull() const
+ Returns TRUE if the width is 0 and the height is 0; otherwise
+ returns FALSE.
+*/
+
+/*!
+ \fn bool TQSize::isEmpty() const
+ Returns TRUE if the width is less than or equal to 0, or the height is
+ less than or equal to 0; otherwise returns FALSE.
+*/
+
+/*!
+ \fn bool TQSize::isValid() const
+ Returns TRUE if the width is equal to or greater than 0 and the height is
+ equal to or greater than 0; otherwise returns FALSE.
+*/
+
+/*!
+ \fn int TQSize::width() const
+ Returns the width.
+ \sa height()
+*/
+
+/*!
+ \fn int TQSize::height() const
+ Returns the height.
+ \sa width()
+*/
+
+/*!
+ \fn void TQSize::setWidth( int w )
+ Sets the width to \a w.
+ \sa width(), setHeight()
+*/
+
+/*!
+ \fn void TQSize::setHeight( int h )
+ Sets the height to \a h.
+ \sa height(), setWidth()
+*/
+
+/*!
+ Swaps the values of width and height.
+*/
+
+void TQSize::transpose()
+{
+ TQCOORD tmp = wd;
+ wd = ht;
+ ht = tmp;
+}
+
+/*! \enum TQSize::ScaleMode
+
+ This enum type defines the different ways of scaling a size.
+
+ \img scaling.png
+
+ \value ScaleFree The size is scaled freely. The ratio is not preserved.
+ \value ScaleMin The size is scaled to a rectangle as large as possible
+ inside a given rectangle, preserving the aspect ratio.
+ \value ScaleMax The size is scaled to a rectangle as small as possible
+ outside a given rectangle, preserving the aspect ratio.
+
+ \sa TQSize::scale(), TQImage::scale(), TQImage::smoothScale()
+*/
+
+/*!
+ Scales the size to a rectangle of width \a w and height \a h according
+ to the ScaleMode \a mode.
+
+ \list
+ \i If \a mode is \c ScaleFree, the size is set to (\a w, \a h).
+ \i If \a mode is \c ScaleMin, the current size is scaled to a rectangle
+ as large as possible inside (\a w, \a h), preserving the aspect ratio.
+ \i If \a mode is \c ScaleMax, the current size is scaled to a rectangle
+ as small as possible outside (\a w, \a h), preserving the aspect ratio.
+ \endlist
+
+ Example:
+ \code
+ TQSize t1( 10, 12 );
+ t1.scale( 60, 60, TQSize::ScaleFree );
+ // t1 is (60, 60)
+
+ TQSize t2( 10, 12 );
+ t2.scale( 60, 60, TQSize::ScaleMin );
+ // t2 is (50, 60)
+
+ TQSize t3( 10, 12 );
+ t3.scale( 60, 60, TQSize::ScaleMax );
+ // t3 is (60, 72)
+ \endcode
+*/
+void TQSize::scale( int w, int h, ScaleMode mode )
+{
+ if ( mode == ScaleFree ) {
+ wd = (TQCOORD)w;
+ ht = (TQCOORD)h;
+ } else {
+ bool useHeight = TRUE;
+ int w0 = width();
+ int h0 = height();
+ int rw = h * w0 / h0;
+
+ if ( mode == ScaleMin ) {
+ useHeight = ( rw <= w );
+ } else { // mode == ScaleMax
+ useHeight = ( rw >= w );
+ }
+
+ if ( useHeight ) {
+ wd = (TQCOORD)rw;
+ ht = (TQCOORD)h;
+ } else {
+ wd = (TQCOORD)w;
+ ht = (TQCOORD)( w * h0 / w0 );
+ }
+ }
+}
+
+/*!
+ \overload
+
+ Equivalent to scale(\a{s}.width(), \a{s}.height(), \a mode).
+*/
+void TQSize::scale( const TQSize &s, ScaleMode mode )
+{
+ scale( s.width(), s.height(), mode );
+}
+
+/*!
+ \fn TQCOORD &TQSize::rwidth()
+ Returns a reference to the width.
+
+ Using a reference makes it possible to directly manipulate the width.
+
+ Example:
+ \code
+ TQSize s( 100, 10 );
+ s.rwidth() += 20; // s becomes (120,10)
+ \endcode
+
+ \sa rheight()
+*/
+
+/*!
+ \fn TQCOORD &TQSize::rheight()
+ Returns a reference to the height.
+
+ Using a reference makes it possible to directly manipulate the height.
+
+ Example:
+ \code
+ TQSize s( 100, 10 );
+ s.rheight() += 5; // s becomes (100,15)
+ \endcode
+
+ \sa rwidth()
+*/
+
+/*!
+ \fn TQSize &TQSize::operator+=( const TQSize &s )
+
+ Adds \a s to the size and returns a reference to this size.
+
+ Example:
+ \code
+ TQSize s( 3, 7 );
+ TQSize r( -1, 4 );
+ s += r; // s becomes (2,11)
+\endcode
+*/
+
+/*!
+ \fn TQSize &TQSize::operator-=( const TQSize &s )
+
+ Subtracts \a s from the size and returns a reference to this size.
+
+ Example:
+ \code
+ TQSize s( 3, 7 );
+ TQSize r( -1, 4 );
+ s -= r; // s becomes (4,3)
+ \endcode
+*/
+
+/*!
+ \fn TQSize &TQSize::operator*=( int c )
+ Multiplies both the width and height by \a c and returns a reference to
+ the size.
+*/
+
+/*!
+ \overload TQSize &TQSize::operator*=( double c )
+
+ Multiplies both the width and height by \a c and returns a reference to
+ the size.
+
+ Note that the result is truncated.
+*/
+
+/*!
+ \fn bool operator==( const TQSize &s1, const TQSize &s2 )
+ \relates TQSize
+ Returns TRUE if \a s1 and \a s2 are equal; otherwise returns FALSE.
+*/
+
+/*!
+ \fn bool operator!=( const TQSize &s1, const TQSize &s2 )
+ \relates TQSize
+ Returns TRUE if \a s1 and \a s2 are different; otherwise returns FALSE.
+*/
+
+/*!
+ \fn const TQSize operator+( const TQSize &s1, const TQSize &s2 )
+ \relates TQSize
+ Returns the sum of \a s1 and \a s2; each component is added separately.
+*/
+
+/*!
+ \fn const TQSize operator-( const TQSize &s1, const TQSize &s2 )
+ \relates TQSize
+ Returns \a s2 subtracted from \a s1; each component is
+ subtracted separately.
+*/
+
+/*!
+ \fn const TQSize operator*( const TQSize &s, int c )
+ \relates TQSize
+ Multiplies \a s by \a c and returns the result.
+*/
+
+/*!
+ \overload const TQSize operator*( int c, const TQSize &s )
+ \relates TQSize
+ Multiplies \a s by \a c and returns the result.
+*/
+
+/*!
+ \overload const TQSize operator*( const TQSize &s, double c )
+ \relates TQSize
+ Multiplies \a s by \a c and returns the result.
+*/
+
+/*!
+ \overload const TQSize operator*( double c, const TQSize &s )
+ \relates TQSize
+ Multiplies \a s by \a c and returns the result.
+*/
+
+/*!
+ \fn TQSize &TQSize::operator/=( int c )
+ Divides both the width and height by \a c and returns a reference to the
+ size.
+*/
+
+/*!
+ \fn TQSize &TQSize::operator/=( double c )
+ \overload
+ Divides both the width and height by \a c and returns a reference to the
+ size.
+
+ Note that the result is truncated.
+*/
+
+/*!
+ \fn const TQSize operator/( const TQSize &s, int c )
+ \relates TQSize
+ Divides \a s by \a c and returns the result.
+*/
+
+/*!
+ \fn const TQSize operator/( const TQSize &s, double c )
+ \relates TQSize
+ \overload
+ Divides \a s by \a c and returns the result.
+
+ Note that the result is truncated.
+*/
+
+/*!
+ \fn TQSize TQSize::expandedTo( const TQSize & otherSize ) const
+
+ Returns a size with the maximum width and height of this size and
+ \a otherSize.
+*/
+
+/*!
+ \fn TQSize TQSize::boundedTo( const TQSize & otherSize ) const
+
+ Returns a size with the minimum width and height of this size and
+ \a otherSize.
+*/
+
+
+void TQSize::warningDivByZero()
+{
+#if defined(TQT_CHECK_MATH)
+ qWarning( "TQSize: Division by zero error" );
+#endif
+}
+
+
+/*****************************************************************************
+ TQSize stream functions
+ *****************************************************************************/
+#ifndef TQT_NO_DATASTREAM
+/*!
+ \relates TQSize
+ Writes the size \a sz to the stream \a s and returns a reference to
+ the stream.
+
+ \sa \link datastreamformat.html Format of the TQDataStream operators \endlink
+*/
+
+TQDataStream &operator<<( TQDataStream &s, const TQSize &sz )
+{
+ if ( s.version() == 1 )
+ s << (TQ_INT16)sz.width() << (TQ_INT16)sz.height();
+ else
+ s << (TQ_INT32)sz.width() << (TQ_INT32)sz.height();
+ return s;
+}
+
+/*!
+ \relates TQSize
+ Reads the size from the stream \a s into size \a sz and returns a
+ reference to the stream.
+
+ \sa \link datastreamformat.html Format of the TQDataStream operators \endlink
+*/
+
+TQDataStream &operator>>( TQDataStream &s, TQSize &sz )
+{
+ if ( s.version() == 1 ) {
+ TQ_INT16 w, h;
+ s >> w; sz.rwidth() = w;
+ s >> h; sz.rheight() = h;
+ }
+ else {
+ TQ_INT32 w, h;
+ s >> w; sz.rwidth() = w;
+ s >> h; sz.rheight() = h;
+ }
+ return s;
+}
+#endif // TQT_NO_DATASTREAM
+
+#endif // USE_QT4 \ No newline at end of file