Compatibility Members for QPainter

以下成员源于类 QPainter are part of the Qt compatibility layer. We advise against using them in new code.

公共函数

const QColor &	backgroundColor () const
bool	begin (QPaintDevice * device , const QWidget * init )
QRect	boundingRect (const QRect & rectangle , int flags , const QString & text , int length )
QRect	boundingRect (int x , int y , int width , int height , int flags , const QString & text , int length )
void	drawConvexPolygon (const QPolygonF & polygon , int index , int count = -1)
void	drawConvexPolygon (const QPolygon & polygon , int index , int count = -1)
void	drawCubicBezier (const QPolygon & controlPoints , int index = 0)
void	drawLineSegments (const QPolygon & polygon , int index = 0, int count = -1)
void	drawPoints (const QPolygon & polygon , int index , int count = -1)
void	drawPolygon (const QPolygonF & polygon , bool winding , int index = 0, int count = -1)
void	drawPolygon (const QPolygon & polygon , bool winding , int index = 0, int count = -1)
void	drawPolyline (const QPolygon & polygon , int index , int count = -1)
void	drawText (int x , int y , const QString & text , int pos , int length )
void	drawText (const QPoint & point , const QString & text , int pos , int length )
void	drawText (int x , int y , const QString & text , int length )
void	drawText (const QPoint & point , const QString & text , int length )
void	drawText (const QRect & rectangle , int flags , const QString & text , int length , QRect * br = 0)
void	drawText (int x , int y , int width , int height , int flags , const QString & text , int length , QRect * br = 0)
bool	hasViewXForm () const
bool	hasWorldXForm () const
void	resetXForm ()
void	setBackgroundColor (const QColor & color )
void	setViewXForm (bool enabled )
void	setWorldXForm (bool enabled )
QPoint	xForm (const QPoint & point ) const
QRect	xForm (const QRect & rectangle ) const
QPolygon	xForm (const QPolygon & polygon ) const
QPolygon	xForm (const QPolygon & polygon , int index , int count ) const

静态公共成员

void	redirect (QPaintDevice * pdev , QPaintDevice * replacement )
QPaintDevice *	redirect (QPaintDevice * pdev )

成员函数文档编制

const QColor & QPainter:: backgroundColor () const

使用 background () 和 QBrush::color () 代替。

例如，若有代码像

QColor myColor = backgroundColor();
					

可以把它重写成

QColor myColor = background().color();
					

Note that the background can be a complex brush such as a texture or a gradient.

另请参阅 setBackgroundColor ().

bool QPainter:: begin ( QPaintDevice * device , const QWidget * init )

使用 begin () 代替。

If the paint device 是 QWidget , QPainter is initialized after the widget's settings automatically. Otherwise, you must call the initFrom () function to initialize the painters pen, background and font to the same as any given widget.

例如，若有代码像

QPainter painter(this);
painter.begin(device, init);
					

可以把它重写成

QPainter painter(this);
painter.begin(device);
painter.initFrom(init);
					

QRect QPainter:: boundingRect (const QRect & rectangle , int flags , const QString & text , int length )

Returns the bounding rectangle for the given length 的 text constrained by the provided rectangle .

使用 boundingRect () combined with QString::left () 代替。

例如，若有代码像

QRect rectangle = boundingRect(rect, flags, text, length);
					

可以把它重写成

QRect rectangle = boundingRect(rect, flags, text.left(length));
					

QRect QPainter:: boundingRect ( int x , int y , int width , int height , int flags , const QString & text , int length )

Returns the bounding rectangle for the given length 的 text constrained by the rectangle that begins at point ( x , y ) 采用给定 width and height .

使用 boundingRect () combined with QString::left () 代替。

例如，若有代码像

QRect rectangle = boundingRect(x, y, width, height, flags, text, length);
					

可以把它重写成

QRect rectangle = boundingRect(x, y, width, height, flags, text.left(length));
					

void QPainter:: drawConvexPolygon (const QPolygonF & polygon , int index , int count = -1)

这是重载函数。

使用 drawConvexPolygon () combined with QPolygonF::constData () 代替。

例如，若有代码像

QPainter painter(this);
painter.drawConvexPolygon(polygon, index, count);
					

可以把它重写成

int pointCount = (count == -1) ?  polygon.size() - index : count;
QPainter painter(this);
painter.drawConvexPolygon(polygon.constData() + index, pointCount);
					

void QPainter:: drawConvexPolygon (const QPolygon & polygon , int index , int count = -1)

这是重载函数。

使用 drawConvexPolygon () combined with QPolygon::constData () 代替。

例如，若有代码像

QPainter painter(this);
painter.drawConvexPolygon(polygon, index, count);
					

可以把它重写成

int pointCount = (count == -1) ?  polygon.size() - index : count;
QPainter painter(this);
painter.drawConvexPolygon(polygon.constData() + index, pointCount);
					

void QPainter:: drawCubicBezier (const QPolygon & controlPoints , int index = 0)

Draws a cubic Bezier curve defined by the controlPoints , starting at controlPoints [index] ( index defaults to 0). Points after controlPoints [index + 3] are ignored. Nothing happens if there aren't enough control points.

使用 strokePath () 代替。

例如，若有代码像

QPainter painter(this);
painter.drawCubicBezier(controlPoints, index)
					

可以把它重写成

QPainterPath path;
path.moveTo(controlPoints.at(index));
path.cubicTo(controlPoints.at(index+1),
                    controlPoints.at(index+2),
                    controlPoints.at(index+3));
QPainter painter(this);
painter.strokePath(path, painter.pen());
					

void QPainter:: drawLineSegments (const QPolygon & polygon , int index = 0, int count = -1)

Draws count separate lines from points defined by the polygon , starting at polygon [index] ( index defaults to 0). If count is -1 (the default) all points until the end of the array are used.

使用 drawLines () combined with QPolygon::constData () 代替。

例如，若有代码像

QPainter painter(this);
painter.drawLineSegments(polygon, index, count);
					

可以把它重写成

int lineCount = (count == -1) ?  (polygon.size() - index) / 2  : count;
QPainter painter(this);
painter.drawLines(polygon.constData() + index * 2, lineCount);
					

void QPainter:: drawPoints (const QPolygon & polygon , int index , int count = -1)

这是重载函数。

Draws count points in the vector polygon starting on index 使用当前钢笔。

使用 drawPoints () combined with QPolygon::constData () 代替。

例如，若有代码像

QPainter painter(this);
painter.drawPoints(polygon, index, count);
					

可以把它重写成

int pointCount = (count == -1) ?  polygon.size() - index : count;
QPainter painter(this);
painter.drawPoints(polygon.constData() + index, pointCount);
					

void QPainter:: drawPolygon (const QPolygonF & polygon , bool winding , int index = 0, int count = -1)

这是重载函数。

使用 drawPolygon () combined with QPolygonF::constData () 代替。

例如，若有代码像

QPainter painter(this);
painter.drawPolygon(polygon, winding, index, count);
					

可以把它重写成

int pointCount = (count == -1) ?  polygon.size() - index : count;
int fillRule = winding ? Qt::WindingFill : Qt::OddEvenFill;
QPainter painter(this);
painter.drawPolygon( polygon.constData() + index, pointCount, fillRule);
					

void QPainter:: drawPolygon (const QPolygon & polygon , bool winding , int index = 0, int count = -1)

这是重载函数。

使用 drawPolygon () combined with QPolygon::constData () 代替。

例如，若有代码像

QPainter painter(this);
painter.drawPolygon(polygon, winding, index, count);
					

可以把它重写成

int pointCount = (count == -1) ?  polygon.size() - index : count;
int fillRule = winding ? Qt::WindingFill : Qt::OddEvenFill;
QPainter painter(this);
painter.drawPolygon( polygon.constData() + index, pointCount, fillRule);
					

void QPainter:: drawPolyline (const QPolygon & polygon , int index , int count = -1)

这是重载函数。

Draws the polyline defined by the count lines of the given polygon starting at index ( index defaults to 0).

使用 drawPolyline () combined with QPolygon::constData () 代替。

例如，若有代码像

QPainter painter(this);
painter.drawPolyline(polygon, index, count);
					

可以把它重写成

int pointCount = (count == -1) ?  polygon.size() - index : count;
QPainter painter(this);
painter.drawPolyline(polygon.constData() + index, pointCount);
					

void QPainter:: drawText ( int x , int y , const QString & text , int pos , int length )

使用 drawText () combined with QString::mid () 代替。

例如，若有代码像

QPainter painter(this);
painter.drawText(x, y, text, pos, length);
					

可以把它重写成

QPainter painter(this);
painter.drawText(x, y, text.mid(pos, length));
					

void QPainter:: drawText (const QPoint & point , const QString & text , int pos , int length )

使用 drawText () combined with QString::mid () 代替。

例如，若有代码像

QPainter painter(this);
painter.drawText(point, text, pos, length);
					

可以把它重写成

QPainter painter(this);
painter.drawText(point, text.mid(pos, length));
					

void QPainter:: drawText ( int x , int y , const QString & text , int length )

使用 drawText () combined with QString::left () 代替。

例如，若有代码像

QPainter painter(this);
painter.drawText(x, y, text, length);
					

可以把它重写成

QPainter painter(this);
painter.drawText(x, y, text.left(length));
					

void QPainter:: drawText (const QPoint & point , const QString & text , int length )

使用 drawText () combined with QString::left () 代替。

例如，若有代码像

QPainter painter(this);
painter.drawText(point, text, length);
					

可以把它重写成

QPainter painter(this);
painter.drawText(point, text.left(length));
					

void QPainter:: drawText (const QRect & rectangle , int flags , const QString & text , int length , QRect * br = 0)

使用 drawText () combined with QString::left () 代替。

例如，若有代码像

QPainter painter(this);
painter.drawText(rectangle, flags, text, length, br );
					

可以把它重写成

QPainter painter(this);
painter.drawText(rectangle, flags, text.left(length), br );
					

void QPainter:: drawText ( int x , int y , int width , int height , int flags , const QString & text , int length , QRect * br = 0)

使用 drawText () combined with QString::left () 代替。

例如，若有代码像

QPainter painter(this);
painter.drawText(x, y, width, height, flags, text, length, br );
					

可以把它重写成

QPainter painter(this);
painter.drawText(x, y, width, height, flags, text.left(length), br );
					

bool QPainter:: hasViewXForm () const

使用 viewTransformEnabled () 代替。

bool QPainter:: hasWorldXForm () const

使用 worldMatrixEnabled () 代替。

[static] void QPainter:: redirect ( QPaintDevice * pdev , QPaintDevice * replacement )

Use setRedirected() instead.

[static] QPaintDevice * QPainter:: redirect ( QPaintDevice * pdev )

Use redirected() instead.

void QPainter:: resetXForm ()

使用 resetTransform () 代替。

void QPainter:: setBackgroundColor (const QColor & color )

使用 setBackground () 代替。

另请参阅 backgroundColor ().

void QPainter:: setViewXForm ( bool enabled )

使用 setViewTransformEnabled () 代替。

另请参阅 hasViewXForm ().

void QPainter:: setWorldXForm ( bool enabled )

使用 setWorldMatrixEnabled () 代替。

另请参阅 hasWorldXForm ().

QPoint QPainter:: xForm (const QPoint & point ) const

使用 combinedTransform () 代替。

QRect QPainter:: xForm (const QRect & rectangle ) const

这是重载函数。

使用 combinedTransform () instead of this function and call mapRect() on the result to obtain a QRect .

QPolygon QPainter:: xForm (const QPolygon & polygon ) const

这是重载函数。

使用 combinedTransform () 代替。

QPolygon QPainter:: xForm (const QPolygon & polygon , int index , int count ) const

这是重载函数。

使用 combinedTransform () combined with QPolygon::mid () 代替。

例如，若有代码像

QPainter painter(this);
QPolygon transformed = painter.xForm(polygon, index, count)
					

可以把它重写成

QPainter painter(this);
QPolygon transformed = polygon.mid(index, count) * painter.combinedTransform();