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SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Objectcom.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.
QPainterPath
object can be constructed as an empty path, with a given start point, or as a copy of another QPainterPath
object. Once created, lines and curves can be added to the path using the 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: See the 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.QPainterPath
class provides a collection of functions that returns information about the path and its elements. 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.QPainterPath Conversion
For compatibility reasons, it might be required to simplify the representation of a painter path: QPainterPath
provides the 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.Examples
Qt provides the Painter Paths Example and the Vector Deformation Demo which are located in Qt's example and demo directories respectively.
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.QSignalEmitter |
---|
QSignalEmitter.Signal0, QSignalEmitter.Signal1, QSignalEmitter.Signal2, QSignalEmitter.Signal3, QSignalEmitter.Signal4, QSignalEmitter.Signal5, QSignalEmitter.Signal6, QSignalEmitter.Signal7, QSignalEmitter.Signal8, QSignalEmitter.Signal9 |
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)
Creates an ellipse within the bounding rectangle defined by its top-left corner at (x, y), width and height, and adds it to the painter path as a closed subpath. |
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. |
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)
Adds a rectangle at position (x, y), with the given width and height, as a closed subpath. |
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)
Adds the given rectangle x, y, w, h with rounded corners to the path. |
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. |
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)
Adds a rounded rectangle to the path, defined by the coordinates x and y with the specified width and height. |
void |
addRoundRect(double x,
double y,
double w,
double h,
int xRnd,
int yRnd)
Adds a rectangle with rounded corners to the path. |
void |
addRoundRect(QRectF rect,
int roundness)
Adds a rounded rectangle, rect, to the path. |
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)
Adds the given text to this path as a set of closed subpaths created from the font supplied. |
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)
Creates a move to that lies on the arc that occupies the QRectF (x, y, width, height) at angle. |
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)
Creates an arc that occupies the rectangle QRectF (x, y, width, height), beginning at the specified startAngle and extending sweepLength degrees counter-clockwise. |
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 counter-clockwise. |
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)
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). |
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. |
static QPainterPath |
fromNativePointer(QNativePointer nativePointer)
|
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)
Draws a line from the current position to the point (x, y). |
void |
lineTo(QPointF p)
Adds a straight line from the current position to the given endPoint. |
void |
moveTo(double x,
double y)
Moves the current position to (x, y) and starts a new subpath, implicitly closing the previous path. |
void |
moveTo(QPointF p)
Moves the current point to the given point, implicitly starting a new subpath and closing the previous one. |
static QNativePointer |
nativePointerArray(QPainterPath[] array)
|
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)
Adds a quadratic Bezier curve between the current point and the endpoint (endPointX, endPointY) with the control point specified by (cx, cy). |
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()
|
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 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()
QPainterPath
object.
public QPainterPath(QPainterPath other)
QPainterPath
object that is a copy of the given path.
public QPainterPath(QPointF startPoint)
QPainterPath
object with the given startPoint as its current position.
Method Detail |
---|
public final void addEllipse(QPointF center, double rx, double ry)
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)
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 top-left 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)
public final void addRegion(QRegion region)
addRect()
, and Composing a QPainterPath
.
public final void addRoundRect(QRectF rect, int roundness)
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)
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)
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)
public final void addRoundedRect(double x, double y, double w, double h, double xRadius, double yRadius, Qt.SizeMode mode)
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)
public final double angleAtPercent(double t)
Positive values for the angles mean counter-clockwise 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)
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)
QRectF
(x, y, width, height), beginning at the specified startAngle and extending sweepLength degrees counter-clockwise.
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)
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)
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)
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)
public final void moveTo(QPointF p)
closeSubpath()
, and Composing a QPainterPath
.
public final void moveTo(double x, double y)
public final void writeTo(QDataStream arg__1)
public final void readFrom(QDataStream arg__1)
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)
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)
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)
intersected()
, subtracted()
, and subtractedInverted().
public static QPainterPath fromNativePointer(QNativePointer nativePointer)
public static QNativePointer nativePointerArray(QPainterPath[] array)
public java.lang.String toString()
toString
in class java.lang.Object
public QPainterPath clone()
clone
in class java.lang.Object
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