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java.lang.Object com.trolltech.qt.internal.QSignalEmitterInternal com.trolltech.qt.QSignalEmitter com.trolltech.qt.QtJambiObject com.trolltech.qt.gui.QPainterPath
public class QPainterPath
The QPainterPath class provides a container for painting operations, enabling graphical shapes to be constructed and reused. A painter path is an object composed of a number of graphical building blocks, such as rectangles, ellipses, lines, and curves. Building blocks can be joined in closed subpaths, for example as a rectangle or an ellipse. A closed path has coinciding start and end points. Or they can exist independently as unclosed subpaths, such as lines and curves.
A QPainterPath object can be used for filling, outlining, and clipping. To generate fillable outlines for a given painter path, use the QPainterPathStroker
class. The main advantage of painter paths over normal drawing operations is that complex shapes only need to be created once; then they can be drawn many times using only calls to the QPainter::drawPath()
function.
QPainterPath provides a collection of functions that can be used to obtain information about the path and its elements. In addition it is possible to reverse the order of the elements using the toReversed()
function. There are also several functions to convert this painter path object into a polygon representation.
lineTo()
, arcTo()
, cubicTo()
and quadTo()
functions. The lines and curves stretch from the currentPosition()
to the position passed as argument. The currentPosition()
of the QPainterPath object is always the end position of the last subpath that was added (or the initial start point). Use the moveTo()
function to move the currentPosition()
without adding a component. The moveTo()
function implicitly starts a new subpath, and closes the previous one. Another way of starting a new subpath is to call the closeSubpath()
function which closes the current path by adding a line from the currentPosition()
back to the path's start position. Note that the new path will have (0, 0) as its initial currentPosition()
.
QPainterPath class also provides several convenience functions to add closed subpaths to a painter path: addEllipse()
, addPath()
, addRect()
, addRegion()
and addText()
. The addPolygon()
function adds an unclosed subpath. In fact, these functions are all collections of moveTo()
, lineTo()
and cubicTo()
operations.
In addition, a path can be added to the current path using the connectPath()
function. But note that this function will connect the last element of the current path to the first element of given one by adding a line.
Below is a code snippet that shows how a QPainterPath object can be used:
 QPainterPath path = new QPainterPath(); path.addRect(20, 20, 60, 60); path.moveTo(0, 0); path.cubicTo(99, 0, 50, 50, 99, 99); path.cubicTo(0, 99, 50, 50, 0, 0); QPainter painter = new QPainter(this); painter.fillRect(0, 0, 100, 100, new QBrush(QColor.white)); painter.setPen(new QPen(new QColor(79, 106, 25), 1, Qt.PenStyle.SolidLine, Qt.PenCapStyle.FlatCap, Qt.PenJoinStyle.MiterJoin)); painter.setBrush(new QColor(122, 163, 39)); painter.drawPath(path); 
Qt::OddEvenFill
. Qt provides two methods for filling paths:  
Qt::OddEvenFill  Qt::WindingFill 

Qt::FillRule
documentation for the definition of the rules. A painter path's currently set fill rule can be retrieved using the fillRule()
function, and altered using the setFillRule()
function.The currentPosition()
function returns the end point of the last subpath that was added (or the initial start point). The elementAt()
function can be used to retrieve the various subpath elements, the number of elements can be retrieved using the elementCount()
function, and the isEmpty()
function tells whether this QPainterPath object contains any elements at all.
The controlPointRect()
function returns the rectangle containing all the points and control points in this path. This function is significantly faster to compute than the exact boundingRect()
which returns the bounding rectangle of this painter path with floating point precision.
Finally, QPainterPath provides the contains()
function which can be used to determine whether a given point or rectangle is inside the path, and the intersects()
function which determines if any of the points inside a given rectangle also are inside this path.
toFillPolygon()
, toFillPolygons()
and toSubpathPolygons()
functions which convert the painter path into a polygon. The toFillPolygon()
returns the painter path as one single polygon, while the two latter functions return a list of polygons. The toFillPolygons()
and toSubpathPolygons()
functions are provided because it is usually faster to draw several small polygons than to draw one large polygon, even though the total number of points drawn is the same. The difference between the two is the number of polygons they return: The toSubpathPolygons()
creates one polygon for each subpath regardless of intersecting subpaths (i.e. overlapping bounding rectangles), while the toFillPolygons()
functions creates only one polygon for overlapping subpaths.
The toFillPolygon()
and toFillPolygons()
functions first convert all the subpaths to polygons, then uses a rewinding technique to make sure that overlapping subpaths can be filled using the correct fill rule. Note that rewinding inserts additional lines in the polygon so the outline of the fill polygon does not match the outline of the path.
The Painter Paths Example shows how painter paths can be used to build complex shapes for rendering and lets the user experiment with the filling and stroking. The Vector Deformation Demo shows how to use QPainterPath to draw text.
 
QPainterPathStroker
, QPainter
, QRegion
, and Painter Paths Example.
Nested Class Summary  

static class 
QPainterPath.ElementType
This enum describes the types of elements used to connect vertices in subpaths. 
Nested classes/interfaces inherited from class com.trolltech.qt.internal.QSignalEmitterInternal 

com.trolltech.qt.internal.QSignalEmitterInternal.AbstractSignalInternal 
Field Summary 

Fields inherited from class com.trolltech.qt.internal.QSignalEmitterInternal 

currentSender 
Constructor Summary  

QPainterPath()
Constructs an empty QPainterPath object. 

QPainterPath(QPainterPath other)
Creates a QPainterPath object that is a copy of the given path. 

QPainterPath(QPointF startPoint)
Creates a QPainterPath object with the given startPoint as its current position. 
Method Summary  

void 
addEllipse(double x,
double y,
double w,
double h)
This is an overloaded member function, provided for convenience. 
void 
addEllipse(QPointF center,
double rx,
double ry)
This is an overloaded member function, provided for convenience. 
void 
addEllipse(QRectF rect)
Creates an ellipse within the the specified boundingRectangle and adds it to the painter path as a closed subpath. 
void 
addPath(QPainterPath path)
Adds the given path to this path as a closed subpath. 
void 
addPolygon(QPolygonF polygon)
Adds the given polygon to the path as an (unclosed) subpath. 
void 
addRect(double x,
double y,
double w,
double h)
This is an overloaded member function, provided for convenience. 
void 
addRect(QRectF rect)
Adds the given rectangle to this path as a closed subpath. 
void 
addRegion(QRegion region)
Adds the given region to the path by adding each rectangle in the region as a separate closed subpath. 
void 
addRoundedRect(double x,
double y,
double w,
double h,
double xRadius,
double yRadius)
This is an overloaded member function, provided for convenience. 
void 
addRoundedRect(double x,
double y,
double w,
double h,
double xRadius,
double yRadius,
Qt.SizeMode mode)
This is an overloaded member function, provided for convenience. 
void 
addRoundedRect(QRectF rect,
double xRadius,
double yRadius)
Adds the given rectangle rect with rounded corners to the path. 
void 
addRoundedRect(QRectF rect,
double xRadius,
double yRadius,
Qt.SizeMode mode)
Adds the given rectangle rect with rounded corners to the path. 
void 
addRoundRect(double x,
double y,
double w,
double h,
int roundness)
This is an overloaded member function, provided for convenience. 
void 
addRoundRect(double x,
double y,
double w,
double h,
int xRnd,
int yRnd)
This is an overloaded member function, provided for convenience. 
void 
addRoundRect(QRectF rect,
int roundness)
This is an overloaded member function, provided for convenience. 
void 
addRoundRect(QRectF rect,
int xRnd,
int yRnd)
Adds a rectangle r with rounded corners to the path. 
void 
addText(double x,
double y,
QFont f,
java.lang.String text)
This is an overloaded member function, provided for convenience. 
void 
addText(QPointF point,
QFont f,
java.lang.String text)
Adds the given text to this path as a set of closed subpaths created from the font supplied. 
double 
angleAtPercent(double t)
Returns the angle of the path tangent at the percentage t. 
void 
arcMoveTo(double x,
double y,
double w,
double h,
double angle)
This is an overloaded member function, provided for convenience. 
void 
arcMoveTo(QRectF rect,
double angle)
Creates a move to that lies on the arc that occupies the given rectangle at angle. 
void 
arcTo(double x,
double y,
double w,
double h,
double startAngle,
double arcLength)
This is an overloaded member function, provided for convenience. 
void 
arcTo(QRectF rect,
double startAngle,
double arcLength)
Creates an arc that occupies the given rectangle, beginning at the specified startAngle and extending sweepLength degrees counterclockwise. 
QRectF 
boundingRect()
Returns the bounding rectangle of this painter path as a rectangle with floating point precision. 
QPainterPath 
clone()
This method is reimplemented for internal reasons 
void 
closeSubpath()
Closes the current subpath by drawing a line to the beginning of the subpath, automatically starting a new path. 
void 
connectPath(QPainterPath path)
Connects the given path to this path by adding a line from the last element of this path to the first element of the given path. 
boolean 
contains(QPainterPath p)
Returns true if the given path p is contained within the current path. 
boolean 
contains(QPointF pt)
Returns true if the given point is inside the path, otherwise returns false. 
boolean 
contains(QRectF rect)
Returns true if the given rectangle is inside the path, otherwise returns false. 
QRectF 
controlPointRect()
Returns the rectangle containing all the points and control points in this path. 
void 
cubicTo(double ctrlPt1x,
double ctrlPt1y,
double ctrlPt2x,
double ctrlPt2y,
double endPtx,
double endPty)
This is an overloaded member function, provided for convenience. 
void 
cubicTo(QPointF ctrlPt1,
QPointF ctrlPt2,
QPointF endPt)
Adds a cubic Bezier curve between the current position and the given endPoint using the control points specified by c1, and c2. 
QPointF 
currentPosition()
Returns the current position of the path. 
QPainterPath_Element 
elementAt(int i)
Returns the element at the given index in the painter path. 
int 
elementCount()
Returns the number of path elements in the painter path. 
Qt.FillRule 
fillRule()
Returns the painter path's currently set fill rule. 
QPainterPath 
intersected(QPainterPath r)
Returns a path which is the intersection of this path's fill area and p's fill area. 
boolean 
intersects(QPainterPath p)
Returns true if the current path intersects at any point the given path p. 
boolean 
intersects(QRectF rect)
Returns true if any point in the given rectangle intersects the path; otherwise returns false. 
boolean 
isEmpty()
Returns true if either there are no elements in this path, or if the only element is a MoveToElement ; otherwise returns false. 
double 
length()
Returns the length of the current path. 
void 
lineTo(double x,
double y)
This is an overloaded member function, provided for convenience. 
void 
lineTo(QPointF p)
Adds a straight line from the current position to the given endPoint. 
void 
moveTo(double x,
double y)
This is an overloaded member function, provided for convenience. 
void 
moveTo(QPointF p)
Moves the current point to the given point, implicitly starting a new subpath and closing the previous one. 
QPainterPath 
operator_add(QPainterPath other)
Returns the union of this path and the other path. 
QPainterPath 
operator_and(QPainterPath other)

QPainterPath 
operator_or(QPainterPath other)
Returns the union of this path and the other path. 
QPainterPath 
operator_subtract(QPainterPath other)
Subtracts the other path from a copy of this path, and returns the copy. 
double 
percentAtLength(double t)
Returns percentage of the whole path at the specified length len. 
QPointF 
pointAtPercent(double t)
Returns the point at at the percentage t of the current path. 
void 
quadTo(double ctrlPtx,
double ctrlPty,
double endPtx,
double endPty)
This is an overloaded member function, provided for convenience. 
void 
quadTo(QPointF ctrlPt,
QPointF endPt)
Adds a quadratic Bezier curve between the current position and the given endPoint with the control point specified by c. 
void 
readFrom(QDataStream arg__1)

void 
setElementPositionAt(int i,
double x,
double y)
Sets the x and y coordinate of the element at index index to x and y. 
void 
setFillRule(Qt.FillRule fillRule)
Sets the fill rule of the painter path to the given fillRule. 
QPainterPath 
simplified()
Returns a simplified version of this path. 
double 
slopeAtPercent(double t)
Returns the slope of the path at the percentage t. 
QPainterPath 
subtracted(QPainterPath r)
Returns a path which is p's fill area subtracted from this path's fill area. 
QPainterPath 
subtractedInverted(QPainterPath r)
Use subtracted() instead. 
QPolygonF 
toFillPolygon()
This is an overloaded member function, provided for convenience. 
QPolygonF 
toFillPolygon(QMatrix matrix)
This is an overloaded member function, provided for convenience. 
QPolygonF 
toFillPolygon(QTransform matrix)
Converts the path into a polygon using the QTransform matrix, and returns the polygon. 
java.util.List 
toFillPolygons()
This is an overloaded method provided for convenience. 
java.util.List 
toFillPolygons(QMatrix matrix)
Converts the path into a list of polygons using the QMatrix matrix, and returns the list. 
java.util.List 
toFillPolygons(QTransform matrix)
Converts the path into a list of polygons using the QTransform matrix, and returns the list. 
QPainterPath 
toReversed()
Creates and returns a reversed copy of the path. 
java.lang.String 
toString()

java.util.List 
toSubpathPolygons()
This is an overloaded method provided for convenience. 
java.util.List 
toSubpathPolygons(QMatrix matrix)
Converts the path into a list of polygons using the QMatrix matrix, and returns the list. 
java.util.List 
toSubpathPolygons(QTransform matrix)
Converts the path into a list of polygons using the QTransform matrix, and returns the list. 
QPainterPath 
united(QPainterPath r)
Returns a path which is the union of this path's fill area and p's fill area. 
void 
writeTo(QDataStream arg__1)

Methods inherited from class com.trolltech.qt.QtJambiObject 

dispose, disposed, equals, finalize, reassignNativeResources, tr, tr, tr 
Methods inherited from class com.trolltech.qt.QSignalEmitter 

blockSignals, disconnect, disconnect, signalsBlocked, signalSender, thread 
Methods inherited from class com.trolltech.qt.internal.QSignalEmitterInternal 

__qt_signalInitialization 
Methods inherited from class java.lang.Object 

getClass, hashCode, notify, notifyAll, wait, wait, wait 
Methods inherited from interface com.trolltech.qt.QtJambiInterface 

disableGarbageCollection, nativeId, nativePointer, reenableGarbageCollection, setJavaOwnership 
Constructor Detail 

public QPainterPath()
public QPainterPath(QPainterPath other)
public QPainterPath(QPointF startPoint)
Method Detail 

public final void addEllipse(QPointF center, double rx, double ry)
Creates an ellipse positioned at center with radii rx and ry, and adds it to the painter path as a closed subpath.
public final void addEllipse(QRectF rect)
The ellipse is composed of a clockwise curve, starting and finishing at zero degrees (the 3 o'clock position).
 QLinearGradient myGradient = new QLinearGradient(); QPen myPen = new QPen(); QRectF boundingRectangle = new QRectF(); QPainterPath myPath = new QPainterPath(); myPath.addEllipse(boundingRectangle); QPainter painter = new QPainter(this); painter.setBrush(myGradient); painter.setPen(myPen); painter.drawPath(myPath); 
arcTo()
, QPainter::drawEllipse()
, and Composing a QPainterPath.
public final void addEllipse(double x, double y, double w, double h)
Creates an ellipse within the bounding rectangle defined by its topleft corner at (x, y), width and height, and adds it to the painter path as a closed subpath.
public final void addPath(QPainterPath path)
connectPath()
, and Composing a QPainterPath.
public final void addPolygon(QPolygonF polygon)
Note that the current position after the polygon has been added, is the last point in polygon. To draw a line back to the first point, use the closeSubpath()
function.
 QLinearGradient myGradient = new QLinearGradient(); QPen myPen = new QPen(); QPolygonF myPolygon = new QPolygonF(); QPainterPath myPath = new QPainterPath(); myPath.addPolygon(myPolygon); QPainter painter = new QPainter(this); painter.setBrush(myGradient); painter.setPen(myPen); painter.drawPath(myPath); 
lineTo()
, and Composing a QPainterPath.
public final void addRect(QRectF rect)
The rectangle is added as a clockwise set of lines. The painter path's current position after the rectangle has been added is at the topleft corner of the rectangle.
 QLinearGradient myGradient = new QLinearGradient(); QPen myPen = new QPen(); QRectF myRectangle = new QRectF(); QPainterPath myPath = new QPainterPath(); myPath.addRect(myRectangle); QPainter painter = new QPainter(this); painter.setBrush(myGradient); painter.setPen(myPen); painter.drawPath(myPath); 
addRegion()
, lineTo()
, and Composing a QPainterPath.
public final void addRect(double x, double y, double w, double h)
Adds a rectangle at position (x, y), with the given width and height, as a closed subpath.
public final void addRegion(QRegion region)
addRect()
, and Composing a QPainterPath.
public final void addRoundRect(QRectF rect, int roundness)
Adds a rounded rectangle, rect, to the path.
The roundness argument specifies uniform roundness for the rectangle. Vertical and horizontal roundness factors will be adjusted accordingly to act uniformly around both axes. Use this method if you want a rectangle equally rounded across both the X and Y axis.
addRoundedRect()
.
public final void addRoundRect(QRectF rect, int xRnd, int yRnd)
The xRnd and yRnd arguments specify how rounded the corners should be. 0 is angled corners, 99 is maximum roundedness.
addRoundedRect()
.
public final void addRoundRect(double x, double y, double w, double h, int roundness)
Adds a rounded rectangle to the path, defined by the coordinates x and y with the specified width and height.
The roundness argument specifies uniform roundness for the rectangle. Vertical and horizontal roundness factors will be adjusted accordingly to act uniformly around both axes. Use this method if you want a rectangle equally rounded across both the X and Y axis.
addRoundedRect()
.
public final void addRoundRect(double x, double y, double w, double h, int xRnd, int yRnd)
Adds a rectangle with rounded corners to the path. The rectangle is constructed from x, y, and the width and height w and h.
The xRnd and yRnd arguments specify how rounded the corners should be. 0 is angled corners, 99 is maximum roundedness.
addRoundedRect()
.
public final void addRoundedRect(QRectF rect, double xRadius, double yRadius)
The xRadius and yRadius arguments specify the radii of the ellipses defining the corners of the rounded rectangle. When mode is Qt::RelativeSize
, xRadius and yRadius are specified in percentage of half the rectangle's width and height respectively, and should be in the range 0.0 to 100.0.
addRect()
.
public final void addRoundedRect(QRectF rect, double xRadius, double yRadius, Qt.SizeMode mode)
The xRadius and yRadius arguments specify the radii of the ellipses defining the corners of the rounded rectangle. When mode is Qt::RelativeSize
, xRadius and yRadius are specified in percentage of half the rectangle's width and height respectively, and should be in the range 0.0 to 100.0.
addRect()
.
public final void addRoundedRect(double x, double y, double w, double h, double xRadius, double yRadius)
Adds the given rectangle x, y, w, h with rounded corners to the path.
public final void addRoundedRect(double x, double y, double w, double h, double xRadius, double yRadius, Qt.SizeMode mode)
Adds the given rectangle x, y, w, h with rounded corners to the path.
public final void addText(QPointF point, QFont f, java.lang.String text)
 QLinearGradient myGradient = new QLinearGradient(); QPen myPen = new QPen(); QFont myFont = font(); QPointF baseline = new QPointF(x, y); QPainterPath myPath = new QPainterPath(); myPath.addText(baseline, myFont, tr("Qt")); QPainter painter = new QPainter(this); painter.setBrush(myGradient); painter.setPen(myPen); painter.drawPath(myPath); 
QPainter::drawText()
, and Composing a QPainterPath.
public final void addText(double x, double y, QFont f, java.lang.String text)
Adds the given text to this path as a set of closed subpaths created from the font supplied. The subpaths are positioned so that the left end of the text's baseline lies at the point specified by (x, y).
public final double angleAtPercent(double t)
Positive values for the angles mean counterclockwise while negative values mean the clockwise direction. Zero degrees is at the 3 o'clock position.
Note that similarly to the other percent methods, the percentage measurment is not linear with regards to the length if curves are present in the path. When curves are present the percentage argument is mapped to the t parameter of the Bezier equations.
public final void arcMoveTo(QRectF rect, double angle)
Angles are specified in degrees. Clockwise arcs can be specified using negative angles.
moveTo()
, and arcTo()
.
public final void arcMoveTo(double x, double y, double w, double h, double angle)
Creates a move to that lies on the arc that occupies the QRectF
(x, y, width, height) at angle.
public final void arcTo(QRectF rect, double startAngle, double arcLength)
Angles are specified in degrees. Clockwise arcs can be specified using negative angles.
Note that this function connects the starting point of the arc to the current position if they are not already connected. After the arc has been added, the current position is the last point in arc. To draw a line back to the first point, use the closeSubpath()
function.
 QLinearGradient myGradient = new QLinearGradient(); QPen myPen = new QPen(); QPointF center = new QPointF(); QPainterPath myPath = new QPainterPath(); myPath.moveTo(center); myPath.arcTo(boundingRect, startAngle, sweepLength); QPainter painter = new QPainter(this); painter.setBrush(myGradient); painter.setPen(myPen); painter.drawPath(myPath); 
arcMoveTo()
, addEllipse()
, QPainter::drawArc()
, QPainter::drawPie()
, and Composing a QPainterPath.
public final void arcTo(double x, double y, double w, double h, double startAngle, double arcLength)
Creates an arc that occupies the rectangle QRectF
(x, y, width, height), beginning at the specified startAngle and extending sweepLength degrees counterclockwise.
public final QRectF boundingRect()
controlPointRect()
.
public final void closeSubpath()
If the subpath does not contain any elements, this function does nothing.
moveTo()
, and Composing a QPainterPath.
public final void connectPath(QPainterPath path)
addPath()
, and Composing a QPainterPath.
public final boolean contains(QPainterPath p)
Set operations on paths will treat the paths as areas. Nonclosed paths will be treated as implicitly closed.
intersects()
.
public final boolean contains(QPointF pt)
intersects()
.
public final boolean contains(QRectF rect)
public final QRectF controlPointRect()
This function is significantly faster to compute than the exact boundingRect()
, and the returned rectangle is always a superset of the rectangle returned by boundingRect()
.
boundingRect()
.
public final void cubicTo(QPointF ctrlPt1, QPointF ctrlPt2, QPointF endPt)
After the curve is added, the current position is updated to be at the end point of the curve.
 QLinearGradient myGradient = new QLinearGradient(); QPen myPen = new QPen(); QPainterPath myPath = new QPainterPath(); myPath.cubicTo(c1, c2, endPoint); QPainter painter = new QPainter(this); painter.setBrush(myGradient); painter.setPen(myPen); painter.drawPath(myPath); 
quadTo()
, and Composing a QPainterPath.
public final void cubicTo(double ctrlPt1x, double ctrlPt1y, double ctrlPt2x, double ctrlPt2y, double endPtx, double endPty)
Adds a cubic Bezier curve between the current position and the end point (endPointX, endPointY) with control points specified by (c1X, c1Y) and (c2X, c2Y).
public final QPointF currentPosition()
public final QPainterPath_Element elementAt(int i)
ElementType
, elementCount()
, and isEmpty()
.
public final int elementCount()
ElementType
, elementAt()
, and isEmpty()
.
public final Qt.FillRule fillRule()
setFillRule()
.
public final QPainterPath intersected(QPainterPath r)
public final boolean intersects(QPainterPath p)
Set operations on paths will treat the paths as areas. Nonclosed paths will be treated as implicitly closed.
contains()
.
public final boolean intersects(QRectF rect)
There is an intersection if any of the lines making up the rectangle crosses a part of the path or if any part of the rectangle overlaps with any area enclosed by the path. This function respects the current fillRule to determine what is considered inside the path.
contains()
.
public final boolean isEmpty()
MoveToElement
; otherwise returns false. elementCount()
.
public final double length()
public final void lineTo(QPointF p)
addPolygon()
, addRect()
, and Composing a QPainterPath.
public final void lineTo(double x, double y)
Draws a line from the current position to the point (x, y).
public final void moveTo(QPointF p)
closeSubpath()
, and Composing a QPainterPath.
public final void moveTo(double x, double y)
Moves the current position to (x, y) and starts a new subpath, implicitly closing the previous path.
public final QPainterPath operator_and(QPainterPath other)
public final QPainterPath operator_add(QPainterPath other)
united()
, operator+=(), and operator().
public final QPainterPath operator_subtract(QPainterPath other)
subtracted()
, operator=(), and operator+().
public final void writeTo(QDataStream arg__1)
public final void readFrom(QDataStream arg__1)
public final QPainterPath operator_or(QPainterPath other)
united()
, operator=(), intersected()
, and operator&().
public final double percentAtLength(double t)
Note that similarly to other percent methods, the percentage measurment is not linear with regards to the length, if curves are present in the path. When curves are present the percentage argument is mapped to the t parameter of the Bezier equations.
public final QPointF pointAtPercent(double t)
Note that similarly to other percent methods, the percentage measurment is not linear with regards to the length, if curves are present in the path. When curves are present the percentage argument is mapped to the t parameter of the Bezier equations.
public final void quadTo(QPointF ctrlPt, QPointF endPt)
After the curve is added, the current point is updated to be at the end point of the curve.
cubicTo()
, and Composing a QPainterPath.
public final void quadTo(double ctrlPtx, double ctrlPty, double endPtx, double endPty)
Adds a quadratic Bezier curve between the current point and the endpoint (endPointX, endPointY) with the control point specified by (cx, cy).
public final void setElementPositionAt(int i, double x, double y)
public final void setFillRule(Qt.FillRule fillRule)
 
Qt::OddEvenFill (default)  Qt::WindingFill 

fillRule()
.
public final QPainterPath simplified()
Qt::OddEvenFill
.
public final double slopeAtPercent(double t)
Note that similarly to other percent methods, the percentage measurment is not linear with regards to the length, if curves are present in the path. When curves are present the percentage argument is mapped to the t parameter of the Bezier equations.
public final QPainterPath subtracted(QPainterPath r)
Set operations on paths will treat the paths as areas. Nonclosed paths will be treated as implicitly closed.
public final QPainterPath subtractedInverted(QPainterPath r)
subtracted()
instead. subtracted()
.
public final QPolygonF toFillPolygon()
public final QPolygonF toFillPolygon(QMatrix matrix)
public final QPolygonF toFillPolygon(QTransform matrix)
QTransform
matrix, and returns the polygon. The polygon is created by first converting all subpaths to polygons, then using a rewinding technique to make sure that overlapping subpaths can be filled using the correct fill rule.
Note that rewinding inserts addition lines in the polygon so the outline of the fill polygon does not match the outline of the path.
toSubpathPolygons()
, toFillPolygons()
, and QPainterPath Conversion.
public final java.util.List toFillPolygons()
public final java.util.List toFillPolygons(QMatrix matrix)
The function differs from the toFillPolygon() function in that it creates several polygons. It is provided because it is usually faster to draw several small polygons than to draw one large polygon, even though the total number of points drawn is the same.
The toFillPolygons() function differs from the toSubpathPolygons() function in that it create only polygon for subpaths that have overlapping bounding rectangles.
Like the toFillPolygon() function, this function uses a rewinding technique to make sure that overlapping subpaths can be filled using the correct fill rule. Note that rewinding inserts addition lines in the polygons so the outline of the fill polygon does not match the outline of the path.
public final java.util.List toFillPolygons(QTransform matrix)
QTransform
matrix, and returns the list. The function differs from the toFillPolygon()
function in that it creates several polygons. It is provided because it is usually faster to draw several small polygons than to draw one large polygon, even though the total number of points drawn is the same.
The toFillPolygons()
function differs from the toSubpathPolygons()
function in that it create only polygon for subpaths that have overlapping bounding rectangles.
Like the toFillPolygon()
function, this function uses a rewinding technique to make sure that overlapping subpaths can be filled using the correct fill rule. Note that rewinding inserts addition lines in the polygons so the outline of the fill polygon does not match the outline of the path.
toSubpathPolygons()
, toFillPolygon()
, and QPainterPath Conversion.
public final QPainterPath toReversed()
It is the order of the elements that is reversed: If a QPainterPath is composed by calling the moveTo()
, lineTo()
and cubicTo()
functions in the specified order, the reversed copy is composed by calling cubicTo()
, lineTo()
and moveTo()
.
public final java.util.List toSubpathPolygons()
public final java.util.List toSubpathPolygons(QMatrix matrix)
This function creates one polygon for each subpath regardless of intersecting subpaths (i.e. overlapping bounding rectangles). To make sure that such overlapping subpaths are filled correctly, use the toFillPolygons() function instead.
public final java.util.List toSubpathPolygons(QTransform matrix)
QTransform
matrix, and returns the list. This function creates one polygon for each subpath regardless of intersecting subpaths (i.e. overlapping bounding rectangles). To make sure that such overlapping subpaths are filled correctly, use the toFillPolygons()
function instead.
toFillPolygons()
, toFillPolygon()
, and QPainterPath Conversion.
public final QPainterPath united(QPainterPath r)
Set operations on paths will treat the paths as areas. Nonclosed paths will be treated as implicitly closed.
intersected()
, subtracted()
, and subtractedInverted().
public java.lang.String toString()
toString
in class java.lang.Object
public QPainterPath clone()
clone
in class java.lang.Object


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