qrect.3qt

qt-embedded-2.3.8.tar.gz源码

.SH "bool QRect::isEmpty () const"
Returns TRUE if the rectangle is empty, otherwise FALSE.
.PP
An empty rectangle has a left() > right() or top() > bottom().
.PP
An empty rectangle is not valid.
.PP
.nf
.br
 isEmpty() == !isValid()
.fi
.PP
See also isNull() and isValid().
.SH "bool QRect::isNull () const"
Returns TRUE if the rectangle is a null rectangle, otherwise FALSE.
.PP
A null rectangle has both the width and the height set to 0, that is right() == left() - 1 and bottom() == top() - 1.
.PP
Remember that if right() == left() and bottom() == top(), then the rectangle has width 1 and height 1.
.PP
A null rectangle is also empty.
.PP
A null rectangle is not valid.
.PP
See also isEmpty() and isValid().
.SH "bool QRect::isValid () const"
Returns TRUE if the rectangle is valid, or FALSE if it is invalid (empty).
.PP
A valid rectangle has a left() <= right() and top() <= bottom().
.PP
.nf
.br
 isValid() == !isEmpty()
.fi
.PP
See also isNull(), isEmpty() and normalize().
.SH "int QRect::left () const"
Returns the left coordinate of the rectangle. Identical to x().
.PP
See also x(), top(), right(), setLeft(), topLeft() and bottomLeft().
.PP
Examples:
.(l
xform/xform.cpp desktop/desktop.cpp
.)l
.SH "void QRect::moveBottomLeft ( const QPoint & p )"
Sets the bottom left position of the rectangle to \fIp,\fR leaving the size unchanged.
.PP
See also bottomLeft(), moveBottomRight(), moveTopLeft(), moveTopRight(), setBottom() and setLeft().
.SH "void QRect::moveBottomRight ( const QPoint & p )"
Sets the bottom right position of the rectangle to \fIp,\fR leaving the size unchanged.
.PP
See also bottomRight(), moveBottomLeft(), moveTopLeft(), moveTopRight(), setBottom() and setRight().
.SH "void QRect::moveBy ( int dx, int dy )"
Moves the rectangle \fIdx\fR along the X axis and \fIdy\fR along the Y axis, relative to the current position. (Positive values moves the rectangle rightwards and/or downwards.).
.PP
Examples:
.(l
xform/xform.cpp
.)l
.SH "void QRect::moveCenter ( const QPoint & p )"
Sets the center point of the rectangle to \fIp,\fR leaving the size unchanged.
.PP
See also center(), moveTopLeft(), moveTopRight(), moveBottomLeft() and moveBottomRight().
.SH "void QRect::moveTopLeft ( const QPoint & p )"
Sets the top left position of the rectangle to \fIp,\fR leaving the size unchanged.
.PP
See also topLeft(), moveTopRight(), moveBottomLeft(), moveBottomRight(), setTop() and setLeft().
.PP
Examples:
.(l
xform/xform.cpp
.)l
.SH "void QRect::moveTopRight ( const QPoint & p )"
Sets the top right position of the rectangle to \fIp,\fR leaving the size unchanged.
.PP
See also topRight(), moveTopLeft(), moveBottomLeft(), moveBottomRight(), setTop() and setRight().
.SH "QRect QRect::normalize () const"
Returns a normalized rectangle, i.e. one that has a non-negative width and height.
.PP
It swaps left and right if left() > right(), and swaps top and bottom if top() > bottom().
.PP
See also isValid().
.SH "QRect QRect::operator& ( const QRect & r ) const"
Returns the intersection of this rectangle and \fIr.\fR
.PP
Returns an empty rectangle if there is no intersection.
.PP
See also operator&=(), operator|(), isEmpty(), intersects() and contains().
.SH "QRect& QRect::operator&= ( const QRect & r )"
Intersects this rectangle with \fIr.\fR
.SH "QRect QRect::operator| ( const QRect & r ) const"
Returns the bounding rectangle of this and \fIr.\fR
.PP
The bounding rectangle of a nonempty rectangle and an empty or invalid rectangle is defined to be the nonempty rectangle.
.PP
See also operator|=(), operator&(), intersects() and contains().
.SH "QRect& QRect::operator|= ( const QRect & r )"
Unites this rectangle with \fIr.\fR
.SH "QCOORD & QRect::rBottom ()"
Returns the reference to the bottom coordinate of the rectangle.
.PP
See also rLeft(), rTop() and rRight().
.SH "QCOORD & QRect::rLeft ()"
Returns the reference to the left coordinate of the rectangle.
.PP
See also rTop(), rRight() and rBottom().
.SH "QCOORD & QRect::rRight ()"
Returns the reference to the right coordinate of the rectangle.
.PP
See also rLeft(), rTop() and rBottom().
.SH "QCOORD & QRect::rTop ()"
Returns the reference to the top coordinate of the rectangle.
.PP
See also rLeft(), rRight() and rBottom().
.SH "void QRect::rect ( int * x, int * y, int * w, int * h ) const"
Extracts the rectangle parameters as the position and the size.
.PP
See also setRect() and coords().
.SH "int QRect::right () const"
Returns the right coordinate of the rectangle.
.PP
See also left(), setRight(), topRight() and bottomRight().
.PP
Examples:
.(l
desktop/desktop.cpp
.)l
.SH "void QRect::setBottom ( int pos )"
Sets the bottom edge of the rectangle. May change the height, but will never change the top edge of the rectangle.
.PP
See also bottom(), setTop() and setHeight().
.SH "void QRect::setCoords ( int xp1, int yp1, int xp2, int yp2 )"
Sets the coordinates of the rectangle's top left corner to \fI(xp1,yp1),\fR and the coordinates of its bottom right corner to \fI(xp2,yp2).\fR
.PP
See also coords() and setRect().
.SH "void QRect::setHeight ( int h )"
Sets the height of the rectangle to \fIh.\fR The top edge is not moved, but the bottom edge may be moved.
.PP
See also height(), setTop(), setBottom() and setSize().
.PP
Examples:
.(l
desktop/desktop.cpp
.)l
.SH "void QRect::setLeft ( int pos )"
Sets the left edge of the rectangle. May change the width, but will never change the right edge of the rectangle.
.PP
Identical to setX().
.PP
See also left(), setTop() and setWidth().
.SH "void QRect::setRect ( int x, int y, int w, int h )"
Sets the coordinates of the rectangle's top left corner to \fI(x,y),\fR and its size to (w,h).
.PP
See also rect() and setCoords().
.SH "void QRect::setRight ( int pos )"
Sets the right edge of the rectangle. May change the width, but will never change the left edge of the rectangle.
.PP
See also right(), setLeft() and setWidth().
.SH "void QRect::setSize ( const QSize & s )"
Sets the size of the rectangle to \fIs.\fR The top left corner is not moved.
.PP
See also size(), setWidth() and setHeight().
.PP
Examples:
.(l
xform/xform.cpp
.)l
.SH "void QRect::setTop ( int pos )"
Sets the top edge of the rectangle. May change the height, but will never change the bottom edge of the rectangle.
.PP
Identical to setY().
.PP
See also top(), setBottom() and setHeight().
.SH "void QRect::setWidth ( int w )"
Sets the width of the rectangle to \fIw.\fR The right edge is changed, but not the left edge.
.PP
See also width(), setLeft(), setRight() and setSize().
.PP
Examples:
.(l
desktop/desktop.cpp
.)l
.SH "void QRect::setX ( int x )"
Sets the x position of the rectangle (its left end). May change the width, but will never change the right edge of the rectangle.
.PP
Identical to setLeft().
.PP
See also x() and setY().
.SH "void QRect::setY ( int y )"
Sets the y position of the rectangle (its top). May change the height, but will never change the bottom edge of the rectangle.
.PP
Identical to setTop().
.PP
See also y() and setX().
.SH "QSize QRect::size () const"
Returns the size of the rectangle.
.PP
See also width() and height().
.PP
Examples:
.(l
movies/main.cpp desktop/desktop.cpp
.)l
.SH "int QRect::top () const"
Returns the top coordinate of the rectangle. Identical to y().
.PP
See also y(), left(), bottom(), setTop(), topLeft() and topRight().
.PP
Examples:
.(l
xform/xform.cpp desktop/desktop.cpp
.)l
.SH "QPoint QRect::topLeft () const"
Returns the top left position of the rectangle.
.PP
See also moveTopLeft(), topRight(), bottomLeft(), bottomRight(), left() and top().
.SH "QPoint QRect::topRight () const"
Returns the top right position of the rectangle.
.PP
See also moveTopRight(), topLeft(), bottomLeft(), bottomRight(), top() and right().
.SH "QRect QRect::unite ( const QRect & r ) const"
.nf
.br
 r.unite(s)
.fi
is equivalent to
.PP
.nf
.br
 r|s
.fi
.
.PP
Examples:
.(l
xform/xform.cpp
.)l
.SH "int QRect::width () const"
Returns the width of the rectangle. The width includes both the left and right edges, ie. width = right - left + 1.
.PP
See also height(), size() and setHeight().
.PP
Examples:
.(l
movies/main.cpp xform/xform.cpp desktop/desktop.cpp
.)l
.SH "int QRect::x () const"
Returns the left coordinate of the rectangle. Identical to left().
.PP
See also left(), y() and setX().
.PP
Examples:
.(l
movies/main.cpp xform/xform.cpp desktop/desktop.cpp
.)l
.SH "int QRect::y () const"
Returns the top coordinate of the rectangle. Identical to top().
.PP
See also top(), x() and setY().
.PP
Examples:
.(l
movies/main.cpp xform/xform.cpp desktop/desktop.cpp
.)l
.SH RELATED FUNCTION DOCUMENTATION
.SH "bool operator== (const QRect & r1, const QRect & r2)"
Returns TRUE if \fIr1\fR and \fIr2\fR are equal, or FALSE if they are different.
.SH "QDataStream & operator>> (QDataStream & s, QRect & r)"
Reads a QRect from the stream and returns a reference to the stream.
.PP
See also Format of the QDataStream operators
.SH "QDataStream & operator<< (QDataStream & s, const QRect & r)"
Writes a QRect to the stream and returns a reference to the stream.
.PP
See also Format of the QDataStream operators
.SH "bool operator!= (const QRect & r1, const QRect & r2)"
Returns TRUE if \fIr1\fR and \fIr2\fR are different, or FALSE if they are equal.
.SH "SEE ALSO"
.BR http://doc.trolltech.com/qrect.html
.BR http://www.trolltech.com/faq/tech.html
.SH COPYRIGHT
Copyright 1992-2001 Trolltech AS, http://www.trolltech.com.  See the
license file included in the distribution for a complete license
statement.
.SH AUTHOR
Generated automatically from the source code.
.SH BUGS
If you find a bug in Qt, please report it as described in
.BR http://doc.trolltech.com/bughowto.html .
Good bug reports make our job much simpler. Thank you.
.P
In case of content or formattting problems with this manual page, please
report them to
.BR [e-mail] .
Please include the name of the manual page (qrect.3qt) and the Qt
version (2.3.8).