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371 lines
11 KiB
371 lines
11 KiB
'\" t
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.TH QSize 3qt "2 February 2007" "Trolltech AS" \" -*- nroff -*-
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.\" Copyright 1992-2007 Trolltech ASA. All rights reserved. See the
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.\" license file included in the distribution for a complete license
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.\" statement.
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.\"
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.ad l
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.nh
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.SH NAME
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QSize \- Defines the size of a two-dimensional object
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.SH SYNOPSIS
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\fC#include <ntqsize.h>\fR
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.PP
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.SS "Public Members"
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.in +1c
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.ti -1c
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.BI "enum \fBScaleMode\fR { ScaleFree, ScaleMin, ScaleMax }"
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.br
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.ti -1c
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.BI "\fBQSize\fR ()"
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.br
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.ti -1c
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.BI "\fBQSize\fR ( int w, int h )"
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.br
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.ti -1c
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.BI "bool \fBisNull\fR () const"
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.br
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.ti -1c
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.BI "bool \fBisEmpty\fR () const"
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.br
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.ti -1c
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.BI "bool \fBisValid\fR () const"
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.br
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.ti -1c
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.BI "int \fBwidth\fR () const"
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.br
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.ti -1c
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.BI "int \fBheight\fR () const"
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.br
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.ti -1c
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.BI "void \fBsetWidth\fR ( int w )"
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.br
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.ti -1c
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.BI "void \fBsetHeight\fR ( int h )"
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.br
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.ti -1c
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.BI "void \fBtranspose\fR ()"
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.br
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.ti -1c
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.BI "void \fBscale\fR ( int w, int h, ScaleMode mode )"
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.br
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.ti -1c
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.BI "void \fBscale\fR ( const QSize & s, ScaleMode mode )"
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.br
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.ti -1c
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.BI "QSize \fBexpandedTo\fR ( const QSize & otherSize ) const"
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.br
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.ti -1c
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.BI "QSize \fBboundedTo\fR ( const QSize & otherSize ) const"
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.br
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.ti -1c
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.BI "QCOORD & \fBrwidth\fR ()"
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.br
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.ti -1c
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.BI "QCOORD & \fBrheight\fR ()"
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.br
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.ti -1c
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.BI "QSize & \fBoperator+=\fR ( const QSize & s )"
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.br
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.ti -1c
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.BI "QSize & \fBoperator-=\fR ( const QSize & s )"
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.br
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.ti -1c
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.BI "QSize & \fBoperator*=\fR ( int c )"
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.br
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.ti -1c
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.BI "QSize & \fBoperator*=\fR ( double c )"
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.br
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.ti -1c
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.BI "QSize & \fBoperator/=\fR ( int c )"
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.br
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.ti -1c
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.BI "QSize & \fBoperator/=\fR ( double c )"
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.br
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.in -1c
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.SH RELATED FUNCTION DOCUMENTATION
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.in +1c
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.ti -1c
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.BI "bool \fBoperator==\fR ( const QSize & s1, const QSize & s2 )"
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.br
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.ti -1c
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.BI "bool \fBoperator!=\fR ( const QSize & s1, const QSize & s2 )"
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.br
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.ti -1c
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.BI "const QSize \fBoperator+\fR ( const QSize & s1, const QSize & s2 )"
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.br
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.ti -1c
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.BI "const QSize \fBoperator-\fR ( const QSize & s1, const QSize & s2 )"
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.br
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.ti -1c
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.BI "const QSize \fBoperator*\fR ( const QSize & s, int c )"
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.br
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.ti -1c
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.BI "const QSize \fBoperator*\fR ( int c, const QSize & s )"
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.br
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.ti -1c
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.BI "const QSize \fBoperator*\fR ( const QSize & s, double c )"
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.br
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.ti -1c
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.BI "const QSize \fBoperator*\fR ( double c, const QSize & s )"
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.br
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.ti -1c
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.BI "const QSize \fBoperator/\fR ( const QSize & s, int c )"
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.br
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.ti -1c
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.BI "const QSize \fBoperator/\fR ( const QSize & s, double c )"
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.br
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.ti -1c
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.BI "QDataStream & \fBoperator<<\fR ( QDataStream & s, const QSize & sz )"
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.br
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.ti -1c
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.BI "QDataStream & \fBoperator>>\fR ( QDataStream & s, QSize & sz )"
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.br
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.in -1c
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.SH DESCRIPTION
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The QSize class defines the size of a two-dimensional object.
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.PP
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A size is specified by a width and a height.
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.PP
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The coordinate type is QCOORD (defined in \fC<ntqwindowdefs.h>\fR as \fCint\fR). The minimum value of QCOORD is QCOORD_MIN (-2147483648) and the maximum value is QCOORD_MAX (2147483647).
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.PP
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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().
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.PP
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See also QPoint, QRect, Graphics Classes, and Image Processing Classes.
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.SS "Member Type Documentation"
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.SH "QSize::ScaleMode"
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This enum type defines the different ways of scaling a size.
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.PP
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<center>
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.ce 1
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.B "[Image Omitted]"
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.PP
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</center>
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.TP
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\fCQSize::ScaleFree\fR - The size is scaled freely. The ratio is not preserved.
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.TP
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\fCQSize::ScaleMin\fR - The size is scaled to a rectangle as large as possible inside a given rectangle, preserving the aspect ratio.
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.TP
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\fCQSize::ScaleMax\fR - The size is scaled to a rectangle as small as possible outside a given rectangle, preserving the aspect ratio.
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.PP
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See also QSize::scale(), QImage::scale(), and QImage::smoothScale().
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.SH MEMBER FUNCTION DOCUMENTATION
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.SH "QSize::QSize ()"
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Constructs a size with invalid (negative) width and height.
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.SH "QSize::QSize ( int w, int h )"
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Constructs a size with width \fIw\fR and height \fIh\fR.
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.SH "QSize QSize::boundedTo ( const QSize & otherSize ) const"
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Returns a size with the minimum width and height of this size and \fIotherSize\fR.
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.SH "QSize QSize::expandedTo ( const QSize & otherSize ) const"
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Returns a size with the maximum width and height of this size and \fIotherSize\fR.
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.PP
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Examples:
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.)l customlayout/card.cpp and customlayout/flow.cpp.
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.SH "int QSize::height () const"
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Returns the height.
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.PP
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See also width().
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.PP
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Examples:
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.)l movies/main.cpp, qfd/fontdisplayer.cpp, and qfd/qfd.cpp.
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.SH "bool QSize::isEmpty () const"
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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.
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.SH "bool QSize::isNull () const"
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Returns TRUE if the width is 0 and the height is 0; otherwise returns FALSE.
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.SH "bool QSize::isValid () const"
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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.
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.SH "QSize & QSize::operator*= ( int c )"
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Multiplies both the width and height by \fIc\fR and returns a reference to the size.
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.SH "QSize & QSize::operator*= ( double c )"
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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.PP
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Multiplies both the width and height by \fIc\fR and returns a reference to the size.
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.PP
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Note that the result is truncated.
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.SH "QSize & QSize::operator+= ( const QSize & s )"
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Adds \fIs\fR to the size and returns a reference to this size.
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.PP
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Example:
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.PP
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.nf
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.br
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QSize s( 3, 7 );
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.br
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QSize r( -1, 4 );
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.br
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s += r; // s becomes (2,11)
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.fi
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.SH "QSize & QSize::operator-= ( const QSize & s )"
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Subtracts \fIs\fR from the size and returns a reference to this size.
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.PP
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Example:
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.PP
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.nf
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.br
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QSize s( 3, 7 );
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.br
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QSize r( -1, 4 );
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.br
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s -= r; // s becomes (4,3)
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.br
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.fi
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.SH "QSize & QSize::operator/= ( int c )"
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Divides both the width and height by \fIc\fR and returns a reference to the size.
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.SH "QSize & QSize::operator/= ( double c )"
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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.PP
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Divides both the width and height by \fIc\fR and returns a reference to the size.
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.PP
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Note that the result is truncated.
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.SH "QCOORD & QSize::rheight ()"
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Returns a reference to the height.
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.PP
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Using a reference makes it possible to directly manipulate the height.
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.PP
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Example:
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.PP
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.nf
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.br
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QSize s( 100, 10 );
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.br
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s.rheight() += 5; // s becomes (100,15)
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.br
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.fi
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.PP
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See also rwidth().
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.SH "QCOORD & QSize::rwidth ()"
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Returns a reference to the width.
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.PP
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Using a reference makes it possible to directly manipulate the width.
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.PP
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Example:
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.PP
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.nf
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.br
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QSize s( 100, 10 );
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.br
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s.rwidth() += 20; // s becomes (120,10)
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.br
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.fi
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.PP
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See also rheight().
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.SH "void QSize::scale ( int w, int h, ScaleMode mode )"
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Scales the size to a rectangle of width \fIw\fR and height \fIh\fR according to the ScaleMode \fImode\fR.
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.TP
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If \fImode\fR is ScaleFree, the size is set to (\fIw\fR, \fIh\fR).
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.TP
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If \fImode\fR is ScaleMin, the current size is scaled to a rectangle as large as possible inside (\fIw\fR, \fIh\fR), preserving the aspect ratio.
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.TP
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If \fImode\fR is ScaleMax, the current size is scaled to a rectangle as small as possible outside (\fIw\fR, \fIh\fR), preserving the aspect ratio.
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.PP
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Example:
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.PP
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.nf
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.br
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QSize t1( 10, 12 );
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.br
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t1.scale( 60, 60, QSize::ScaleFree );
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.br
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// t1 is (60, 60)
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.br
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.br
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QSize t2( 10, 12 );
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.br
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t2.scale( 60, 60, QSize::ScaleMin );
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.br
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// t2 is (50, 60)
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.br
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.br
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QSize t3( 10, 12 );
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.br
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t3.scale( 60, 60, QSize::ScaleMax );
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.br
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// t3 is (60, 72)
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.br
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.fi
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.SH "void QSize::scale ( const QSize & s, ScaleMode mode )"
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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.PP
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Equivalent to scale(\fIs\fR.width(), \fIs\fR.height(), \fImode\fR).
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.SH "void QSize::setHeight ( int h )"
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Sets the height to \fIh\fR.
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.PP
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See also height() and setWidth().
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.SH "void QSize::setWidth ( int w )"
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Sets the width to \fIw\fR.
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.PP
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See also width() and setHeight().
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.SH "void QSize::transpose ()"
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Swaps the values of width and height.
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.SH "int QSize::width () const"
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Returns the width.
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.PP
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See also height().
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.PP
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Examples:
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.)l movies/main.cpp, qfd/fontdisplayer.cpp, and qfd/qfd.cpp.
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.SH RELATED FUNCTION DOCUMENTATION
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.SH "bool operator!= ( const QSize & s1, const QSize & s2 )"
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Returns TRUE if \fIs1\fR and \fIs2\fR are different; otherwise returns FALSE.
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.SH "const QSize operator* ( const QSize & s, int c )"
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Multiplies \fIs\fR by \fIc\fR and returns the result.
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.SH "const QSize operator* ( int c, const QSize & s )"
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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.PP
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Multiplies \fIs\fR by \fIc\fR and returns the result.
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.SH "const QSize operator* ( const QSize & s, double c )"
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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.PP
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Multiplies \fIs\fR by \fIc\fR and returns the result.
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.SH "const QSize operator* ( double c, const QSize & s )"
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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.PP
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Multiplies \fIs\fR by \fIc\fR and returns the result.
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.SH "const QSize operator+ ( const QSize & s1, const QSize & s2 )"
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Returns the sum of \fIs1\fR and \fIs2\fR; each component is added separately.
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.SH "const QSize operator- ( const QSize & s1, const QSize & s2 )"
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Returns \fIs2\fR subtracted from \fIs1\fR; each component is subtracted separately.
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.SH "const QSize operator/ ( const QSize & s, int c )"
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Divides \fIs\fR by \fIc\fR and returns the result.
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.SH "const QSize operator/ ( const QSize & s, double c )"
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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.PP
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Divides \fIs\fR by \fIc\fR and returns the result.
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.PP
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Note that the result is truncated.
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.SH "QDataStream & operator<< ( QDataStream & s, const QSize & sz )"
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Writes the size \fIsz\fR to the stream \fIs\fR and returns a reference to the stream.
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.PP
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See also Format of the QDataStream operators.
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.SH "bool operator== ( const QSize & s1, const QSize & s2 )"
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Returns TRUE if \fIs1\fR and \fIs2\fR are equal; otherwise returns FALSE.
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.SH "QDataStream & operator>> ( QDataStream & s, QSize & sz )"
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Reads the size from the stream \fIs\fR into size \fIsz\fR and returns a reference to the stream.
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.PP
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See also Format of the QDataStream operators.
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.SH "SEE ALSO"
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.BR http://doc.trolltech.com/ntqsize.html
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.BR http://www.trolltech.com/faq/tech.html
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.SH COPYRIGHT
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Copyright 1992-2007 Trolltech ASA, http://www.trolltech.com. See the
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license file included in the distribution for a complete license
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statement.
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.SH AUTHOR
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Generated automatically from the source code.
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.SH BUGS
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If you find a bug in Qt, please report it as described in
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.BR http://doc.trolltech.com/bughowto.html .
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Good bug reports help us to help you. Thank you.
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.P
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The definitive TQt documentation is provided in HTML format; it is
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located at $TQTDIR/doc/html and can be read using TQt Assistant or with
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a web browser. This man page is provided as a convenience for those
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users who prefer man pages, although this format is not officially
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supported by Trolltech.
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.P
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If you find errors in this manual page, please report them to
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.BR qt-bugs@trolltech.com .
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Please include the name of the manual page (tqsize.3qt) and the Qt
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version (3.3.8).
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