qwttext.3

软件无线电的平台

.TH "QwtText" 3 "4 Nov 2003" "Qwt User's Guide" \" -*- nroff -*-
.ad l
.nh
.SH NAME
QwtText \- 
.SH SYNOPSIS
.br
.PP
Inherited by \fBQwtPlainText\fP, and \fBQwtRichText\fP.
.PP
.SH "Detailed Description"
.PP 
A virtual class to draw text. 

QwtText is an interface class for drawing plain and rich text. It provides also an interface for text classes that understand other text description languages such as LaTeX or LyX.
.PP
\fBWarning:\fP
.RS 4
Rich text in Qt-2.3.x does not understand sub- and super-scripts. Qt-3.x.x does a better job in rendering mathematics. 
.RE
.PP

.PP
.SS "Public Member Functions"

.in +1c
.ti -1c
.RI "virtual \fB~QwtText\fP ()"
.br
.ti -1c
.RI "virtual void \fBsetText\fP (const  QString &)"
.br
.ti -1c
.RI "QString \fBtext\fP () const "
.br
.ti -1c
.RI "bool \fBisNull\fP () const "
.br
.ti -1c
.RI "bool \fBisEmpty\fP () const "
.br
.ti -1c
.RI "bool \fBoperator!\fP () const "
.br
.ti -1c
.RI "virtual void \fBsetFont\fP (const  QFont &)"
.br
.ti -1c
.RI "QFont \fBfont\fP () const "
.br
.ti -1c
.RI "QFontMetrics \fBfontMetrics\fP () const "
.br
.ti -1c
.RI "virtual void \fBsetAlignment\fP (int align)"
.br
.ti -1c
.RI "int \fBalignment\fP () const "
.br
.ti -1c
.RI "virtual void \fBsetColor\fP (const  QColor &)"
.br
.ti -1c
.RI "QColor \fBcolor\fP () const "
.br
.ti -1c
.RI "virtual void \fBsetRectPen\fP (const  QPen &)"
.br
.ti -1c
.RI "QPen \fBrectPen\fP () const "
.br
.ti -1c
.RI "virtual void \fBsetRectBrush\fP (const  QBrush &)"
.br
.ti -1c
.RI "QBrush \fBrectBrush\fP () const "
.br
.ti -1c
.RI "virtual int \fBheightForWidth\fP (int width) const =0"
.br
.ti -1c
.RI "virtual QRect \fBboundingRect\fP (QPainter *painter=0) const =0"
.br
.ti -1c
.RI "virtual void \fBdraw\fP (QPainter *painter, const  QRect &rect) const =0"
.br
.ti -1c
.RI "virtual \fBQwtText\fP * \fBclone\fP () const =0"
.br
.in -1c
.SS "Static Public Member Functions"

.in +1c
.ti -1c
.RI "\fBQwtText\fP * \fBmakeText\fP (const  QString &, Qt::TextFormat, int align, const  QFont &, const  QColor &color=QColor(), const  QPen &pen=QPen(Qt::NoPen), const  QBrush &brush=QBrush(Qt::NoBrush))"
.br
.ti -1c
.RI "\fBQwtText\fP * \fBmakeText\fP (const  QString &, int align, const  QFont &, const  QColor &color=QColor(), const  QPen &pen=QPen(Qt::NoPen), const  QBrush &brush=QBrush(Qt::NoBrush))"
.br
.ti -1c
.RI "void \fBsetDefaultFormat\fP (Qt::TextFormat)"
.br
.ti -1c
.RI "Qt::TextFormat \fBdefaultFormat\fP ()"
.br
.in -1c
.SS "Protected Member Functions"

.in +1c
.ti -1c
.RI "\fBQwtText\fP (const  QString &text, const  QFont &, int align, const  QColor &, const  QPen &pen=QPen(Qt::NoPen), const  QBrush &brush=QBrush(Qt::NoBrush))"
.br
.in -1c
.SH "Constructor & Destructor Documentation"
.PP 
.SS "QwtText::~\fBQwtText\fP ()\fC [virtual]\fP"
.PP
Destructor. 
.SS "QwtText::QwtText (const QString & text, const QFont & font, int align, const QColor & color, const QPen & pen = QPen(Qt::NoPen), const QBrush & brush = QBrush(Qt::NoBrush))\fC [protected]\fP"
.PP
Constructor. \fBParameters:\fP
.RS 4
\fItext\fP Text 
.br
\fIfont\fP Font 
.br
\fIalign\fP Alignment flags 
.br
\fIcolor\fP Color 
.br
\fIpen\fP Pen 
.br
\fIbrush\fP Brush 
.RE
.PP

.SH "Member Function Documentation"
.PP 
.SS "int QwtText::alignment () const"
.PP
Get the alignment flags. 
.SS "virtual QRect QwtText::boundingRect (QPainter * painter = 0) const\fC [pure virtual]\fP"
.PP
Returns the bounding rectangle. The bounding rectangle is calculated with respect to (0, 0). The left and top border depend on the alignment flags:
.IP "\(bu" 2
the left border is at -width, -width/2 or 0 for Qt::AlignRight, Qt::AlignHCenter or Qt::AlignLeft respectively
.IP "\(bu" 2
the top border is at 0, -height/2 or -height for Qt::AlignTop, Qt::AlignVCenter or Qt::AlignBottom respectively
.PP
.PP
Use for instance QRect::moveBy(x,y), before drawing the text into the rectangle. Implemented in \fBQwtPlainText\fP, and \fBQwtRichText\fP.
.SS "virtual \fBQwtText\fP* QwtText::clone () const\fC [pure virtual]\fP"
.PP
Create a clone Implemented in \fBQwtPlainText\fP, and \fBQwtRichText\fP.
.SS "QColor QwtText::color () const"
.PP
Return the color. 
.SS "Qt::TextFormat QwtText::defaultFormat ()\fC [static]\fP"
.PP
Return default format for the QwtText factory. 
.SS "virtual void QwtText::draw (QPainter * painter, const QRect & rect) const\fC [pure virtual]\fP"
.PP
Draw the text in a clipping rectangle. \fBParameters:\fP
.RS 4
\fIpainter\fP Painter 
.br
\fIrect\fP Clipping rectangle 
.RE
.PP
Implemented in \fBQwtPlainText\fP, and \fBQwtRichText\fP.
.SS "QFont QwtText::font () const"
.PP
Return the font. 
.SS "QFontMetrics QwtText::fontMetrics () const"
.PP
Return the font metrics. 
.SS "virtual int QwtText::heightForWidth (int width) const\fC [pure virtual]\fP"
.PP
Find the height for a given width. \fBParameters:\fP
.RS 4
\fIwidth\fP Width 
.RE
.PP
\fBReturns:\fP
.RS 4
height Height 
.RE
.PP
Implemented in \fBQwtPlainText\fP, and \fBQwtRichText\fP.
.SS "\fBQwtText\fP * QwtText::makeText (const QString & text, int align, const QFont & font, const QColor & color = QColor(), const QPen & pen = QPen(Qt::NoPen), const QBrush & brush = QBrush(Qt::NoBrush))\fC [static]\fP"
.PP
Factory function for QwtText objects. Creates a text according to \fBQwtText::defaultFormat()\fP
.PP
\fBParameters:\fP
.RS 4
\fItext\fP Contents of the text 
.br
\fIalign\fP Or'd values of Qt::AlignmentFlags for drawing the text 
.br
\fIfont\fP Font of the text 
.br
\fIcolor\fP Color of the text 
.br
\fIpen\fP Pen to draw the enclosing rectangle 
.br
\fIbrush\fP Brush to draw the enclosing rectangle 
.RE
.PP
\fBReturns:\fP
.RS 4
Pointer to a new \fBQwtPlainText\fP or \fBQwtRichText\fP object 
.RE
.PP
\fBSee also:\fP
.RS 4
\fBQwtText::defaultFormat\fP, \fBQwtText::setDefaultFormat\fP 
.RE
.PP

.SS "\fBQwtText\fP * QwtText::makeText (const QString & text, Qt::TextFormat format, int align, const QFont & font, const QColor & color = QColor(), const QPen & pen = QPen(Qt::NoPen), const QBrush & brush = QBrush(Qt::NoBrush))\fC [static]\fP"
.PP
Factory function for QwtText objects.
.PP
\fBParameters:\fP
.RS 4
\fItext\fP Contents of the text 
.br
\fIformat\fP Format of the text 
.br
\fIalign\fP Or'd values of Qt::AlignmentFlags for drawing the text 
.br
\fIfont\fP Font of the text 
.br
\fIcolor\fP Color of the text 
.br
\fIpen\fP Pen to draw the enclosing rectangle 
.br
\fIbrush\fP Brush to draw the enclosing rectangle 
.RE
.PP
\fBReturns:\fP
.RS 4
Pointer to a new \fBQwtPlainText\fP or \fBQwtRichText\fP object 
.RE
.PP

.SS "QBrush QwtText::rectBrush () const"
.PP
Return the rectangle brush. 
.SS "QPen QwtText::rectPen () const"
.PP
Return the rectangle pen. 
.SS "void QwtText::setAlignment (int align)\fC [virtual]\fP"
.PP
Set the alignment flags. 
.PP
\fBParameters:\fP
.RS 4
\fIalign\fP Or'd Qt::Alignment flags 
.RE
.PP
Reimplemented in \fBQwtRichText\fP.
.SS "void QwtText::setColor (const QColor &)\fC [virtual]\fP"
.PP
Set the color. 
.SS "void QwtText::setDefaultFormat (Qt::TextFormat)\fC [static]\fP"
.PP
Set the default format for the QwtText factory. 
.SS "void QwtText::setFont (const QFont &)\fC [virtual]\fP"
.PP
Set the font. Reimplemented in \fBQwtRichText\fP.
.SS "void QwtText::setRectBrush (const QBrush &)\fC [virtual]\fP"
.PP
Set the rectangle brush. 
.SS "void QwtText::setRectPen (const QPen &)\fC [virtual]\fP"
.PP
Set the rectangle pen. 
.SS "void QwtText::setText (const QString &)\fC [virtual]\fP"
.PP
Set the text. Reimplemented in \fBQwtRichText\fP.
.SS "QString QwtText::text () const"
.PP
Return the text. 

.SH "Author"
.PP 
Generated automatically by Doxygen for Qwt User's Guide from the source code.