Question

The QBrush class defines the fill pattern of shapes drawn by a QPainter. More...

#include <qbrush.h>

Inherits Qt.

List of all member functions.

Public Members

• QBrush ()
• QBrush ( BrushStylestyle )
• QBrush ( constQColor&color, BrushStylestyle = SolidPattern )
• QBrush ( constQColor&color, constQPixmap&pixmap )
• QBrush ( constQBrush&b )
• ~QBrush ()
• QBrush & operator= ( constQBrush&b )
• BrushStyle style () const
• void setStyle ( BrushStyles )
• const QColor & color () const
• void setColor ( constQColor&c )
• QPixmap * pixmap () const
• void setPixmap ( constQPixmap&pixmap )
• bool operator== ( constQBrush&b ) const
• bool operator!= ( constQBrush&b ) const

Related Functions

• QDataStream & operator<< ( QDataStream&s, constQBrush&b )
• QDataStream & operator>> ( QDataStream&s, QBrush&b )

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Detailed Description

The QBrush class defines the fill pattern of shapes drawn by a QPainter.

A brush has a style and a color. One of the brush styles is a custom pattern, which is defined by a QPixmap.

The brush style defines the fill pattern. The default brush style is NoBrush (depending on how you construct a brush). This style tells the painter to not fill shapes. The standard style for filling is SolidPattern.

The brush color defines the color of the fill pattern. The QColor documentation lists the predefined colors.

Use the QPen class for specifying line/outline styles.

Example:

        QPainter painter;
        QBrush   brush( yellow );           // yellow solid pattern
        painter.begin( &anyPaintDevice );   // paint something
        painter.setBrush( brush );          // set the yellow brush
        painter.setPen( NoPen );            // do not draw outline
        painter.drawRect( 40,30, 200,100 ); // draw filled rectangle
        painter.setBrush( NoBrush );        // do not fill
        painter.setPen( black );            // set black pen, 0 pixel width
        painter.drawRect( 10,10, 30,20 );   // draw rectangle outline
        painter.end();                      // painting done
    

See the setStyle() function for a complete list of brush styles.

See also QPainter, QPainter::setBrush(), QPainter::setBrushOrigin(), Graphics Classes, Image Processing Classes and Implicitly and Explicitly Shared Classes.

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Member Function Documentation

QBrush::QBrush ()

Constructs a default black brush with the style NoBrush (will not fill shapes).

QBrush::QBrush ( BrushStylestyle )

Constructs a black brush with the style style.

See also setStyle().

QBrush::QBrush ( constQColor&color, BrushStylestyle = SolidPattern )

Constructs a brush with the color color and the style style.

See also setColor() and setStyle().

QBrush::QBrush ( constQColor&color, constQPixmap&pixmap )

Constructs a brush with the color color and a custom pattern stored in pixmap.

The color will only have an effect for monochrome pixmaps, i.e. for QPixmap::depth() == 1.

See also setColor() and setPixmap().

QBrush::QBrush ( constQBrush&b )

Constructs a brush that is a shallow copy of b.

QBrush::~QBrush ()

Destroys the brush.

constQColor& QBrush::color () const

Returns the brush color.

See also setColor().

bool QBrush::operator!= ( constQBrush&b ) const

Returns TRUE if the brush is different from b; otherwise returns FALSE.

Two brushes are different if they have different styles, colors or pixmaps.

See also operator==().

QBrush& QBrush::operator= ( constQBrush&b )

Assigns b to this brush and returns a reference to this brush.

bool QBrush::operator== ( constQBrush&b ) const

Returns TRUE if the brush is equal to b; otherwise returns FALSE.

Two brushes are equal if they have equal styles, colors and pixmaps.

See also operator!=().

QPixmap* QBrush::pixmap () const

Returns a pointer to the custom brush pattern, or 0 if no custom brush pattern has been set.

See also setPixmap().

Example: richtext/richtext.cpp.

void QBrush::setColor ( constQColor&c )

Sets the brush color to c.

See also color() and setStyle().

Example: picture/picture.cpp.

void QBrush::setPixmap ( constQPixmap&pixmap )

Sets the brush pixmap to pixmap. The style is set to CustomPattern.

The current brush color will only have an effect for monochrome pixmaps, i.e. for QPixmap::depth() == 1.

See also pixmap() and color().

Example: richtext/richtext.cpp.

void QBrush::setStyle ( BrushStyles )

Sets the brush style to s.

The brush styles are:

Pattern	Meaning
NoBrush	will not fill shapes (default).
SolidPattern	solid (100%) fill pattern.
Dense1Pattern	94% fill pattern.
Dense2Pattern	88% fill pattern.
Dense3Pattern	63% fill pattern.
Dense4Pattern	50% fill pattern.
Dense5Pattern	37% fill pattern.
Dense6Pattern	12% fill pattern.
Dense7Pattern	6% fill pattern.
HorPattern	horizontal lines pattern.
VerPattern	vertical lines pattern.
CrossPattern	crossing lines pattern.
BDiagPattern	diagonal lines (directed /) pattern.
FDiagPattern	diagonal lines (directed \) pattern.
DiagCrossPattern	diagonal crossing lines pattern.
CustomPattern	set when a pixmap pattern is being used.

On Windows, only the dense patterns are transparent.

See the Detailed Description for a picture of all the styles.

See also style().

BrushStyle QBrush::style () const

Returns the brush style.

See also setStyle().

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Related Functions

QDataStream& operator<< ( QDataStream&s, constQBrush&b )

Writes the brush b to the stream s and returns a reference to the stream.

See also Format of the QDataStream operators.

QDataStream& operator>> ( QDataStream&s, QBrush&b )

Reads the brush b from the stream s and returns a reference to the stream.

See also Format of the QDataStream operators.