Qt 3 Support Members for QPainter The following class members are part of the Qt 3 support layer . They are provided to help you port old code to Qt 4. We advise against using them in new code.
Public Functions
const QColor & backgroundColor bool begin device , const QWidget * init )QRect boundingRect rectangle , int flags , const QString & text , int length )QRect boundingRect x , int y , int width , int height , int flags , const QString & text , int length )void drawConvexPolygon polygon , int index , int count = -1 )void drawConvexPolygon polygon , int index , int count = -1 )void drawCubicBezier controlPoints , int index = 0 )void drawLineSegments polygon , int index = 0, int count = -1 )void drawPoints polygon , int index , int count = -1 )void drawPolygon polygon , bool winding , int index = 0, int count = -1 )void drawPolygon polygon , bool winding , int index = 0, int count = -1 )void drawPolyline polygon , int index , int count = -1 )void drawText x , int y , const QString & text , int pos , int length )void drawText point , const QString & text , int pos , int length )void drawText x , int y , const QString & text , int length )void drawText point , const QString & text , int length )void drawText rectangle , int flags , const QString & text , int length , QRect * br = 0 )void drawText x , int y , int width , int height , int flags , const QString & text , int length , QRect * br = 0 )bool hasViewXForm bool hasWorldXForm void resetXForm void setBackgroundColor color )void setViewXForm enabled )void setWorldXForm enabled )qreal translationX qreal translationY QPoint xForm point ) constQRect xForm rectangle ) constQPolygon xForm polygon ) constQPolygon xForm polygon , int index , int count ) constQPoint xFormDev point ) constQRect xFormDev rectangle ) constQPolygon xFormDev polygon ) constQPolygon xFormDev polygon , int index , int count ) const
Static Public Members
void redirect pdev , QPaintDevice * replacement )QPaintDevice * redirect pdev )
Member Function Documentation
QColor & QPainter::backgroundColor () constUse background () and QBrush::color () instead.
For example, if you have code like
QColor myColor = backgroundColor(); you can rewrite it as
QColor myColor = background().color();
Note that the background can be a complex brush such as a texture or a gradient.
See also setBackgroundColor ().
QPaintDevice * device , const QWidget * init )Use begin () instead.
If the paint device is a 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.
For example, if you have code like
QPainter painter(this);
painter.begin(device, init); you can rewrite it as
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 of the text constrained by the provided rectangle .
Use boundingRect () combined with QString::left () instead.
For example, if you have code like
QRect rectangle = boundingRect(rect, flags, text, length); you can rewrite it as
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 of the text constrained by the rectangle that begins at point (x , y ) with the given width and height .
Use boundingRect () combined with QString::left () instead.
For example, if you have code like
QRect rectangle = boundingRect(x, y, width, height, flags, text, length); you can rewrite it as
QRect rectangle = boundingRect(x, y, width, height, flags, text.left(length));
QPolygonF & polygon , int index , int count = -1 )This is an overloaded function.
Use drawConvexPolygon () combined with QPolygonF::constData () instead.
For example, if you have code like
QPainter painter(this);
painter.drawConvexPolygon(polygon, index, count); you can rewrite it as
int pointCount = (count == -1) ? polygon.size() - index : count;
QPainter painter(this);
painter.drawConvexPolygon(polygon.constData() + index, pointCount);
QPolygon & polygon , int index , int count = -1 )This is an overloaded function.
Use drawConvexPolygon () combined with QPolygon::constData () instead.
For example, if you have code like
QPainter painter(this);
painter.drawConvexPolygon(polygon, index, count); you can rewrite it as
int pointCount = (count == -1) ? polygon.size() - index : count;
QPainter painter(this);
painter.drawConvexPolygon(polygon.constData() + index, pointCount);
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.
Use strokePath () instead.
For example, if you have code like
QPainter painter(this);
painter.drawCubicBezier(controlPoints, index) you can rewrite it as
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());
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.
Use drawLines () combined with QPolygon::constData () instead.
For example, if you have code like
QPainter painter(this);
painter.drawLineSegments(polygon, index, count); you can rewrite it as
int lineCount = (count == -1) ? (polygon.size() - index) / 2 : count;
QPainter painter(this);
painter.drawLines(polygon.constData() + index * 2, lineCount);
QPolygon & polygon , int index , int count = -1 )This is an overloaded function.
Draws count points in the vector polygon starting on index using the current pen.
Use drawPoints () combined with QPolygon::constData () instead.
For example, if you have code like
QPainter painter(this);
painter.drawPoints(polygon, index, count); you can rewrite it as
int pointCount = (count == -1) ? polygon.size() - index : count;
QPainter painter(this);
painter.drawPoints(polygon.constData() + index, pointCount);
QPolygonF & polygon , bool winding , int index = 0, int count = -1 )This is an overloaded function.
Use drawPolygon () combined with QPolygonF::constData () instead.
For example, if you have code like
QPainter painter(this);
painter.drawPolygon(polygon, winding, index, count); you can rewrite it as
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);
QPolygon & polygon , bool winding , int index = 0, int count = -1 )This is an overloaded function.
Use drawPolygon () combined with QPolygon::constData () instead.
For example, if you have code like
QPainter painter(this);
painter.drawPolygon(polygon, winding, index, count); you can rewrite it as
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);
QPolygon & polygon , int index , int count = -1 )This is an overloaded function.
Draws the polyline defined by the count lines of the given polygon starting at index (index defaults to 0).
Use drawPolyline () combined with QPolygon::constData () instead.
For example, if you have code like
QPainter painter(this);
painter.drawPolyline(polygon, index, count); you can rewrite it as
int pointCount = (count == -1) ? polygon.size() - index : count;
QPainter painter(this);
painter.drawPolyline(polygon.constData() + index, pointCount);
x , int y , const QString & text , int pos , int length )Use drawText () combined with QString::mid () instead.
For example, if you have code like
QPainter painter(this);
painter.drawText(x, y, text, pos, length); you can rewrite it as
QPainter painter(this);
painter.drawText(x, y, text.mid(pos, length));
QPoint & point , const QString & text , int pos , int length )Use drawText () combined with QString::mid () instead.
For example, if you have code like
QPainter painter(this);
painter.drawText(point, text, pos, length); you can rewrite it as
QPainter painter(this);
painter.drawText(point, text.mid(pos, length));
x , int y , const QString & text , int length )Use drawText () combined with QString::left () instead.
For example, if you have code like
QPainter painter(this);
painter.drawText(x, y, text, length); you can rewrite it as
QPainter painter(this);
painter.drawText(x, y, text.left(length));
QPoint & point , const QString & text , int length )Use drawText () combined with QString::left () instead.
For example, if you have code like
QPainter painter(this);
painter.drawText(point, text, length); you can rewrite it as
QPainter painter(this);
painter.drawText(point, text.left(length));
QRect & rectangle , int flags , const QString & text , int length , QRect * br = 0 )Use drawText () combined with QString::left () instead.
For example, if you have code like
QPainter painter(this);
painter.drawText(rectangle, flags, text, length, br ); you can rewrite it as
QPainter painter(this);
painter.drawText(rectangle, flags, text.left(length), br );
x , int y , int width , int height , int flags , const QString & text , int length , QRect * br = 0 )Use drawText () combined with QString::left () instead.
For example, if you have code like
QPainter painter(this);
painter.drawText(x, y, width, height, flags, text, length, br ); you can rewrite it as
QPainter painter(this);
painter.drawText(x, y, width, height, flags, text.left(length), br );
Use viewTransformEnabled () instead.
Use worldMatrixEnabled () instead.
QPaintDevice * pdev , QPaintDevice * replacement ) [static] Use setRedirected () instead.
Use redirected () instead.
Use resetTransform () instead.
QColor & color )Use setBackground () instead.
See also backgroundColor ().
enabled )Use setViewTransformEnabled () instead.
See also hasViewXForm ().
enabled )Use setWorldMatrixEnabled () instead.
See also hasWorldXForm ().
qreal QPainter::translationX () constUse the worldTransform () combined with QTransform::dx () instead.
For example, if you have code like
QPainter painter(this);
qreal x = painter.translationX(); you can rewrite it as
QPainter painter(this);
qreal x = painter.worldTransform().dx();
qreal QPainter::translationY () constUse the worldTransform () combined with QTransform::dy () instead.
For example, if you have code like
QPainter painter(this);
qreal y = painter.translationY(); you can rewrite it as
QPainter painter(this);
qreal y = painter.worldTransform().dy();
QPoint QPainter::xForm ( const QPoint & point ) constUse combinedTransform () instead.
QRect QPainter::xForm ( const QRect & rectangle ) constThis is an overloaded function.
Use combinedTransform () instead of this function and call mapRect() on the result to obtain a QRect .
QPolygon QPainter::xForm ( const QPolygon & polygon ) constThis is an overloaded function.
Use combinedTransform () instead.
QPolygon QPainter::xForm ( const QPolygon & polygon , int index , int count ) constThis is an overloaded function.
Use combinedTransform () combined with QPolygon::mid () instead.
For example, if you have code like
QPainter painter(this);
QPolygon transformed = painter.xForm(polygon, index, count) you can rewrite it as
QPainter painter(this);
QPolygon transformed = polygon.mid(index, count) * painter.combinedTransform();
QPoint QPainter::xFormDev ( const QPoint & point ) constThis is an overloaded function.
Use combinedTransform () combined with QTransform::inverted () instead.
For example, if you have code like
QPainter painter(this);
QPoint transformed = painter.xFormDev(point); you can rewrite it as
QPainter painter(this);
QPoint transformed = point * painter.combinedTransform().inverted();
QRect QPainter::xFormDev ( const QRect & rectangle ) constThis is an overloaded function.
Use combinedTransform () combined with QTransform::inverted () instead.
For example, if you have code like
QPainter painter(this);
QRect transformed = painter.xFormDev(rectangle); you can rewrite it as
QPainter painter(this);
QRegion region = QRegion(rectangle) * painter.combinedTransform().inverted();
QRect transformed = region.boundingRect();
QPolygon QPainter::xFormDev ( const QPolygon & polygon ) constThis is an overloaded function.
Use combinedTransform () combined with QTransform::inverted () instead.
For example, if you have code like
QPainter painter(this);
QPolygon transformed = painter.xFormDev(rectangle); you can rewrite it as
QPainter painter(this);
QPolygon transformed = polygon * painter.combinedTransform().inverted();
QPolygon QPainter::xFormDev ( const QPolygon & polygon , int index , int count ) constThis is an overloaded function.
Use combinedTransform () combined with QPolygon::mid () and QTransform::inverted () instead.
For example, if you have code like
QPainter painter(this);
QPolygon transformed = painter.xFormDev(polygon, index, count); you can rewrite it as
QPainter painter(this);
QPolygon transformed = polygon.mid(index, count) * painter.combinedTransform().inverted();
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