qbrush.3qt

Qt/Embedded是一个多平台的C++图形用户界面应用程序框架

.TH QBrush 3qt "10 November 2000" "Trolltech AS" \" -*- nroff -*-
.\" Copyright 1992-2000 Trolltech AS.  All rights reserved.  See the
.\" license file included in the distribution for a complete license
.\" statement.
.\"
.ad l
.nh
.SH NAME
QBrush \- Defines the fill pattern of shapes drawn by a QPainter
.SH SYNOPSIS
.br
.PP
\fC#include <qbrush.h>\fR
.PP
Inherits Qt.
.PP
.SS "Public Members"
.in +1c
.ti -1c
.BI "\fBQBrush\fR () "
.br
.ti -1c
.BI "\fBQBrush\fR ( BrushStyle ) "
.br
.ti -1c
.BI "\fBQBrush\fR ( const QColor &, BrushStyle=SolidPattern ) "
.br
.ti -1c
.BI "\fBQBrush\fR ( const QColor &, const QPixmap & ) "
.br
.ti -1c
.BI "\fBQBrush\fR ( const QBrush & ) "
.br
.ti -1c
.BI "\fB~QBrush\fR () "
.br
.ti -1c
.BI "QBrush& \fBoperator=\fR ( const QBrush & ) "
.br
.ti -1c
.BI "BrushStyle \fBstyle\fR () const"
.br
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.BI "void \fBsetStyle\fR ( BrushStyle ) "
.br
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.BI "const QColor& \fBcolor\fR () const"
.br
.ti -1c
.BI "void \fBsetColor\fR ( const QColor & ) "
.br
.ti -1c
.BI "QPixmap* \fBpixmap\fR () const"
.br
.ti -1c
.BI "void \fBsetPixmap\fR ( const QPixmap & ) "
.br
.ti -1c
.BI "bool \fBoperator==\fR ( const QBrush & p ) const"
.br
.ti -1c
.BI "bool \fBoperator!=\fR ( const QBrush & b ) const"
.br
.in -1c
.SH RELATED FUNCTION DOCUMENTATION
(Note that these are not member functions.)
.in +1c
.ti -1c
.BI "QDataStream & \fBoperator>>\fR (QDataStream & " "s" ", QBrush & " "b" ")"
.br
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.BI "QDataStream & \fBoperator<<\fR (QDataStream & " "s" ", const QBrush & " "b" ")"
.br
.in -1c
.SH DESCRIPTION
The QBrush class defines the fill pattern of shapes drawn by a QPainter.
.PP
A brush has a style and a color. One of the brush styles is a custom pattern, which is defined by a QPixmap.
.PP
The brush style defines the fill pattern. The default brush style is \fCNoBrush\fR (depends on how you construct a brush). This style tells the painter to not fill shapes. The standard style for filling is called \fCSolidPattern.\fR
.PP
The brush color defines the color of the fill pattern. The QColor documentation lists the predefined colors.
.PP
Use the QPen class for specifying line/outline styles.
.PP
Example:
.PP
.nf
.br
    QPainter painter;
.br
    QBrush   brush( yellow );           // yellow solid pattern
.br
    painter.begin( &anyPaintDevice );   // paint something
.br
    painter.setBrush( brush );          // set the yellow brush
.br
    painter.setPen( NoPen );            // do not draw outline
.br
    painter.drawRect( 40,30, 200,100 ); // draw filled rectangle
.br
    painter.setBrush( NoBrush );        // do not fill
.br
    painter.setPen( black );            // set black pen, 0 pixel width
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    painter.drawRect( 10,10, 30,20 );   // draw rectangle outline
.br
    painter.end();                      // painting done
.fi
.PP
See the setStyle() function for a complete list of brush styles.
.PP
See also QPainter, QPainter::setBrush() and QPainter::setBrushOrigin().
.PP
Examples:
.(l
drawdemo/drawdemo.cpp picture/picture.cpp
.)l
.SH MEMBER FUNCTION DOCUMENTATION
.SH "QBrush::QBrush ()"
Constructs a default black brush with the style \fCNoBrush\fR (will not fill shapes).
.SH "QBrush::QBrush ( BrushStyle style )"
Constructs a black brush with the specified style.
.PP
See also setStyle().
.SH "QBrush::QBrush ( const QColor & color, BrushStyle style=SolidPattern )"
Constructs a brush with a specified color and style.
.PP
See also setColor() and setStyle().
.SH "QBrush::QBrush ( const QColor & color, const QPixmap & pixmap )"
Constructs a brush with a specified color and a custom pattern.
.PP
The color will only have an effect for monochrome pixmaps, i.e. QPixmap::depth() == 1.
.PP
See also setColor() and setPixmap().
.SH "QBrush::QBrush ( const QBrush & b )"
Constructs a brush which is a shallow copy of \fIb.\fR
.SH "QBrush::~QBrush ()"
Destructs the brush.
.SH "const QColor & QBrush::color () const"
Returns the brush color.
.PP
See also setColor().
.SH "bool QBrush::operator!= ( const QBrush & b ) const"
Returns TRUE if the brush is different from \fIb,\fR or FALSE if the brushes are equal.
.PP
Two brushes are different if they have different styles, colors or pixmaps.
.PP
See also operator==().
.SH "QBrush & QBrush::operator= ( const QBrush & b )"
Assigns \fIb\fR to this brush and returns a reference to this brush.
.SH "bool QBrush::operator== ( const QBrush & b ) const"
Returns TRUE if the brush is equal to \fIb,\fR or FALSE if the brushes are different.
.PP
Two brushes are equal if they have equal styles, colors and pixmaps.
.PP
See also operator!=().
.SH "QPixmap * QBrush::pixmap () const"
Returns a pointer to the custom brush pattern.
.PP
A null pointer is returned if no custom brush pattern has been set.
.PP
See also setPixmap().
.SH "void QBrush::setColor ( const QColor & c )"
Sets the brush color to \fIc.\fR
.PP
See also color() and setStyle().
.PP
Examples:
.(l
picture/picture.cpp
.)l
.SH "void QBrush::setPixmap ( const QPixmap & pixmap )"
Sets the brush pixmap. The style is set to \fCCustomPattern.\fR
.PP
The current brush color will only have an effect for monochrome pixmaps, i.e. QPixmap::depth() == 1.
.PP
See also pixmap() and color().
.SH "void QBrush::setStyle ( BrushStyle s )"
Sets the brush style to \fIs.\fR
.PP
The brush styles are:
.TP
\fCNoBrush\fR will not fill shapes (default).
.TP
\fCSolidPattern\fR solid (100%) fill pattern.
.TP
\fCDense1Pattern\fR 94% fill pattern.
.TP
\fCDense2Pattern\fR 88% fill pattern.
.TP
\fCDense3Pattern\fR 63% fill pattern.
.TP
\fCDense4Pattern\fR 50% fill pattern.
.TP
\fCDense5Pattern\fR 37% fill pattern.
.TP
\fCDense6Pattern\fR 12% fill pattern.
.TP
\fCDense7Pattern\fR 6% fill pattern.
.TP
\fCHorPattern\fR horizontal lines pattern.
.TP
\fCVerPattern\fR vertical lines pattern.
.TP
\fCCrossPattern\fR crossing lines pattern.
.TP
\fCBDiagPattern\fR diagonal lines (directed / ) pattern.
.TP
\fCFDiagPattern\fR diagonal lines (directed \\ ) pattern.
.TP
\fCDiagCrossPattern\fR diagonal crossing lines pattern.
.TP
\fCCustomPattern\fR set when a pixmap pattern is being used.
.PP
See also style().
.SH "BrushStyle QBrush::style () const"
Returns the brush style.
.PP
See also setStyle().
.SH RELATED FUNCTION DOCUMENTATION
.SH "QDataStream & operator>> (QDataStream & s, QBrush & b)"
Reads a brush from the stream and returns a reference to the stream.
.PP
See also Format of the QDataStream operators
.SH "QDataStream & operator<< (QDataStream & s, const QBrush & b)"
Writes a brush to the stream and returns a reference to the stream.
.PP
See also  Format of the QDataStream operators
.SH "SEE ALSO"
.BR http://doc.trolltech.com/qbrush.html
.SH COPYRIGHT
Copyright 1992-2000 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.