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QPainter Class Reference
[QtGui module]

The QPainter class performs low-level painting on widgets and other paint devices. More...

Inherited by QStylePainter.

Types

Methods

Static Methods

Special Methods

Detailed Description

The QPainter class performs low-level painting on widgets and other paint devices.

QPainter provides highly optimized functions to do most of the drawing GUI programs require. It can draw everything from simple lines to complex shapes like pies and chords. It can also draw aligned text and pixmaps. Normally, it draws in a "natural" coordinate system, but it can also do view and world transformation. QPainter can operate on any object that inherits the QPaintDevice class.

The common use of QPainter is inside a widget's paint event: Construct and customize (e.g. set the pen or the brush) the painter. Then draw. Remember to destroy the QPainter object after drawing. For example:

 void SimpleExampleWidget.paintEvent(QPaintEvent *)
 {
     QPainter painter(this);
     painter.setPen(Qt.blue);
     painter.setFont(QFont("Arial", 30));
     painter.drawText(rect(), Qt.AlignCenter, "Qt");
 }

The core functionality of QPainter is drawing, but the class also provide several functions that allows you to customize QPainter's settings and its rendering quality, and others that enable clipping. In addition you can control how different shapes are merged together by specifying the painter's composition mode.

The isActive() function indicates whether the painter is active. A painter is activated by the begin() function and the constructor that takes a QPaintDevice argument. The end() function, and the destructor, deactivates it.

Together with the QPaintDevice and QPaintEngine classes, QPainter form the basis for Qt's paint system. QPainter is the class used to perform drawing operations. QPaintDevice represents a device that can be painted on using a QPainter. QPaintEngine provides the interface that the painter uses to draw onto different types of devices. If the painter is active, device() returns the paint device on which the painter paints, and paintEngine() returns the paint engine that the painter is currently operating on. For more information, see the Paint System.

Sometimes it is desirable to make someone else paint on an unusual QPaintDevice. QPainter supports a static function to do this, setRedirected().

Warning: When the paintdevice is a widget, QPainter can only be used inside a paintEvent() function or in a function called by paintEvent(); that is unless the Qt.WA_PaintOutsidePaintEvent widget attribute is set. On Mac OS X and Windows, you can only paint in a paintEvent() function regardless of this attribute's setting.

Settings

There are several settings that you can customize to make QPainter draw according to your preferences:

Note that some of these settings mirror settings in some paint devices, e.g. QWidget.font(). The QPainter.begin() function (or equivalently the QPainter constructor) copies these attributes from the paint device.

You can at any time save the QPainter's state by calling the save() function which saves all the available settings on an internal stack. The restore() function pops them back.

Drawing

QPainter provides functions to draw most primitives: drawPoint(), drawPoints(), drawLine(), drawRect(), drawRoundedRect(), drawEllipse(), drawArc(), drawPie(), drawChord(), drawPolyline(), drawPolygon(), drawConvexPolygon() and drawCubicBezier(). The two convenience functions, drawRects() and drawLines(), draw the given number of rectangles or lines in the given array of QRects or QLines using the current pen and brush.

The QPainter class also provides the fillRect() function which fills the given QRect, with the given QBrush, and the eraseRect() function that erases the area inside the given rectangle.

All of these functions have both integer and floating point versions.

Basic Drawing Example

The Basic Drawing example shows how to display basic graphics primitives in a variety of styles using the QPainter class.

If you need to draw a complex shape, especially if you need to do so repeatedly, consider creating a QPainterPath and drawing it using drawPath().

Painter Paths example

The QPainterPath class provides a container for painting operations, enabling graphical shapes to be constructed and reused.

The Painter Paths example shows how painter paths can be used to build complex shapes for rendering.

QPainter also provides the fillPath() function which fills the given QPainterPath with the given QBrush, and the strokePath() function that draws the outline of the given path (i.e. strokes the path).

See also the Vector Deformation demo which shows how to use advanced vector techniques to draw text using a QPainterPath, the Gradients demo which shows the different types of gradients that are available in Qt, and the Path Stroking demo which shows Qt's built-in dash patterns and shows how custom patterns can be used to extend the range of available patterns.

Vector Deformation Gradients Path Stroking

There are functions to draw pixmaps/images, namely drawPixmap(), drawImage() and drawTiledPixmap(). Both drawPixmap() and drawImage() produce the same result, except that drawPixmap() is faster on-screen while drawImage() may be faster on a QPrinter or other devices.

Text drawing is done using drawText(). When you need fine-grained positioning, boundingRect() tells you where a given drawText() command will draw.

There is a drawPicture() function that draws the contents of an entire QPicture. The drawPicture() function is the only function that disregards all the painter's settings as QPicture has its own settings.

Rendering Quality

To get the optimal rendering result using QPainter, you should use the platform independent QImage as paint device; i.e. using QImage will ensure that the result has an identical pixel representation on any platform.

The QPainter class also provides a means of controlling the rendering quality through its RenderHint enum and the support for floating point precision: All the functions for drawing primitives has a floating point version. These are often used in combination with the QPainter.Antialiasing render hint.

Concentric Circles Example

The Concentric Circles example shows the improved rendering quality that can be obtained using floating point precision and anti-aliasing when drawing custom widgets.

The application's main window displays several widgets which are drawn using the various combinations of precision and anti-aliasing.

The RenderHint enum specifies flags to QPainter that may or may not be respected by any given engine. QPainter.Antialiasing indicates that the engine should antialias edges of primitives if possible, QPainter.TextAntialiasing indicates that the engine should antialias text if possible, and the QPainter.SmoothPixmapTransform indicates that the engine should use a smooth pixmap transformation algorithm. HighQualityAntialiasing is an OpenGL-specific rendering hint indicating that the engine should use fragment programs and offscreen rendering for antialiasing.

The renderHints() function returns a flag that specifies the rendering hints that are set for this painter. Use the setRenderHint() function to set or clear the currently set RenderHints.

Coordinate Transformations

Normally, the QPainter operates on the device's own coordinate system (usually pixels), but QPainter has good support for coordinate transformations.

nop rotate() scale() translate()

The most commonly used transformations are scaling, rotation, translation and shearing. Use the scale() function to scale the coordinate system by a given offset, the rotate() function to rotate it clockwise and translate() to translate it (i.e. adding a given offset to the points). You can also twist the coordinate system around the origin using the shear() function. See the Affine Transformations demo for a visualization of a sheared coordinate system.

See also the Transformations example which shows how transformations influence the way that QPainter renders graphics primitives. In particular it shows how the order of transformations affects the result.

Affine Transformations Demo

The Affine Transformations demo show Qt's ability to perform affine transformations on painting operations. The demo also allows the user to experiment with the transformation operations and see the results immediately.

All the tranformation operations operate on the transformation worldTransform(). A matrix transforms a point in the plane to another point. For more information about the transformation matrix, see the Coordinate System and QTransform documentation.

The setWorldTransform() function can replace or add to the currently set worldTransform(). The resetTransform() function resets any transformations that were made using translate(), scale(), shear(), rotate(), setWorldTransform(), setViewport() and setWindow() functions. The deviceTransform() returns the matrix that transforms from logical coordinates to device coordinates of the platform dependent paint device. The latter function is only needed when using platform painting commands on the platform dependent handle, and the platform does not do transformations nativly.

When drawing with QPainter, we specify points using logical coordinates which then are converted into the physical coordinates of the paint device. The mapping of the logical coordinates to the physical coordinates are handled by QPainter's combinedTransform(), a combination of viewport() and window() and worldTransform(). The viewport() represents the physical coordinates specifying an arbitrary rectangle, the window() describes the same rectangle in logical coordinates, and the worldTransform() is identical with the transformation matrix.

See also Coordinate System

Clipping

QPainter can clip any drawing operation to a rectangle, a region, or a vector path. The current clip is available using the functions clipRegion() and clipPath(). Whether paths or regions are preferred (faster) depends on the underlying paintEngine(). For example, the QImage paint engine prefers paths while the X11 paint engine prefers regions. Setting a clip is done in the painters logical coordinates.

After QPainter's clipping, the paint device may also clip. For example, most widgets clip away the pixels used by child widgets, and most printers clip away an area near the edges of the paper. This additional clipping is not reflected by the return value of clipRegion() or hasClipping().

Composition Modes

QPainter provides the CompositionMode enum which defines the Porter-Duff rules for digital image compositing; it describes a model for combining the pixels in one image, the source, with the pixels in another image, the destination.

The two most common forms of composition are Source and SourceOver. Source is used to draw opaque objects onto a paint device. In this mode, each pixel in the source replaces the corresponding pixel in the destination. In SourceOver composition mode, the source object is transparent and is drawn on top of the destination.

Note that composition transformation operates pixelwise. For that reason, there is a difference between using the graphic primitive itself and its bounding rectangle: The bounding rect contains pixels with alpha == 0 (i.e the pixels surrounding the primitive). These pixels will overwrite the other image's pixels, affectively clearing those, while the primitive only overwrites its own area.

Composition Modes Demo

The Composition Modes demo, available in Qt's demo directory, allows you to experiment with the various composition modes and see the results immediately.

Limitations

If you are using coordinates with Qt's raster-based paint engine, it is important to note that, while coordinates greater than +/- 215 can be used, any painting performed with coordinates outside this range is not guaranteed to be shown; the drawing may be clipped. This is due to the use of short int in the implementation.

The outlines generated by Qt's stroker are only an approximation when dealing with curved shapes. It is in most cases impossible to represent the outline of a bezier curve segment using another bezier curve segment, and so Qt approximates the curve outlines by using several smaller curves. For performance reasons there is a limit to how many curves Qt uses for these outlines, and thus when using large pen widths or scales the outline error increases. To generate outlines with smaller errors it is possible to use the QPainterPathStroker class, which has the setCurveThreshold member function which let's the user specify the error tolerance. Another workaround is to convert the paths to polygons first and then draw the polygons instead.

Performance

QPainter is a rich framework that allows developers to do a great variety of graphical operations, such as gradients, composition modes and vector graphics. And QPainter can do this across a variety of different hardware and software stacks. Naturally the underlying combination of hardware and software has some implications for performance, and ensuring that every single operation is fast in combination with all the various combinations of composition modes, brushes, clipping, transformation, etc, is close to an impossible task because of the number of permutations. As a compromise we have selected a subset of the QPainter API and backends, where performance is guaranteed to be as good as we can sensibly get it for the given combination of hardware and software.

The backends we focus on as high-performance engines are:

These operations are:

This list gives an indication of which features to safely use in an application where performance is critical. For certain setups, other operations may be fast too, but before making extensive use of them, it is recommended to benchmark and verify them on the system where the software will run in the end. There are also cases where expensive operations are ok to use, for instance when the result is cached in a QPixmap.

Type Documentation

QPainter.CompositionMode

Defines the modes supported for digital image compositing. Composition modes are used to specify how the pixels in one image, the source, are merged with the pixel in another image, the destination.

Please note that the bitwise raster operation modes, denoted with a RasterOp prefix, are only natively supported in the X11 and raster paint engines. This means that the only way to utilize these modes on the Mac is via a QImage. The RasterOp denoted blend modes are not supported for pens and brushes with alpha components. Also, turning on the QPainter.Antialiasing render hint will effectively disable the RasterOp modes.

The most common type is SourceOver (often referred to as just alpha blending) where the source pixel is blended on top of the destination pixel in such a way that the alpha component of the source defines the translucency of the pixel.

When the paint device is a QImage, the image format must be set to Format_ARGB32Premultiplied or Format_ARGB32 for the composition modes to have any effect. For performance the premultiplied version is the preferred format.

When a composition mode is set it applies to all painting operator, pens, brushes, gradients and pixmap/image drawing.

Constant Value Description
QPainter.CompositionMode_SourceOver 0 This is the default mode. The alpha of the source is used to blend the pixel on top of the destination.
QPainter.CompositionMode_DestinationOver 1 The alpha of the destination is used to blend it on top of the source pixels. This mode is the inverse of CompositionMode_SourceOver.
QPainter.CompositionMode_Clear 2 The pixels in the destination are cleared (set to fully transparent) independent of the source.
QPainter.CompositionMode_Source 3 The output is the source pixel. (This means a basic copy operation and is identical to SourceOver when the source pixel is opaque).
QPainter.CompositionMode_Destination 4 The output is the destination pixel. This means that the blending has no effect. This mode is the inverse of CompositionMode_Source.
QPainter.CompositionMode_SourceIn 5 The output is the source, where the alpha is reduced by that of the destination.
QPainter.CompositionMode_DestinationIn 6 The output is the destination, where the alpha is reduced by that of the source. This mode is the inverse of CompositionMode_SourceIn.
QPainter.CompositionMode_SourceOut 7 The output is the source, where the alpha is reduced by the inverse of destination.
QPainter.CompositionMode_DestinationOut 8 The output is the destination, where the alpha is reduced by the inverse of the source. This mode is the inverse of CompositionMode_SourceOut.
QPainter.CompositionMode_SourceAtop 9 The source pixel is blended on top of the destination, with the alpha of the source pixel reduced by the alpha of the destination pixel.
QPainter.CompositionMode_DestinationAtop 10 The destination pixel is blended on top of the source, with the alpha of the destination pixel is reduced by the alpha of the destination pixel. This mode is the inverse of CompositionMode_SourceAtop.
QPainter.CompositionMode_Xor 11 The source, whose alpha is reduced with the inverse of the destination alpha, is merged with the destination, whose alpha is reduced by the inverse of the source alpha. CompositionMode_Xor is not the same as the bitwise Xor.
QPainter.CompositionMode_Plus 12 Both the alpha and color of the source and destination pixels are added together.
QPainter.CompositionMode_Multiply 13 The output is the source color multiplied by the destination. Multiplying a color with white leaves the color unchanged, while multiplying a color with black produces black.
QPainter.CompositionMode_Screen 14 The source and destination colors are inverted and then multiplied. Screening a color with white produces white, whereas screening a color with black leaves the color unchanged.
QPainter.CompositionMode_Overlay 15 Multiplies or screens the colors depending on the destination color. The destination color is mixed with the source color to reflect the lightness or darkness of the destination.
QPainter.CompositionMode_Darken 16 The darker of the source and destination colors is selected.
QPainter.CompositionMode_Lighten 17 The lighter of the source and destination colors is selected.
QPainter.CompositionMode_ColorDodge 18 The destination color is brightened to reflect the source color. A black source color leaves the destination color unchanged.
QPainter.CompositionMode_ColorBurn 19 The destination color is darkened to reflect the source color. A white source color leaves the destination color unchanged.
QPainter.CompositionMode_HardLight 20 Multiplies or screens the colors depending on the source color. A light source color will lighten the destination color, whereas a dark source color will darken the destination color.
QPainter.CompositionMode_SoftLight 21 Darkens or lightens the colors depending on the source color. Similar to CompositionMode_HardLight.
QPainter.CompositionMode_Difference 22 Subtracts the darker of the colors from the lighter. Painting with white inverts the destination color, whereas painting with black leaves the destination color unchanged.
QPainter.CompositionMode_Exclusion 23 Similar to CompositionMode_Difference, but with a lower contrast. Painting with white inverts the destination color, whereas painting with black leaves the destination color unchanged.
QPainter.RasterOp_SourceOrDestination 24 Does a bitwise OR operation on the source and destination pixels (src OR dst).
QPainter.RasterOp_SourceAndDestination 25 Does a bitwise AND operation on the source and destination pixels (src AND dst).
QPainter.RasterOp_SourceXorDestination 26 Does a bitwise XOR operation on the source and destination pixels (src XOR dst).
QPainter.RasterOp_NotSourceAndNotDestination 27 Does a bitwise NOR operation on the source and destination pixels ((NOT src) AND (NOT dst)).
QPainter.RasterOp_NotSourceOrNotDestination 28 Does a bitwise NAND operation on the source and destination pixels ((NOT src) OR (NOT dst)).
QPainter.RasterOp_NotSourceXorDestination 29 Does a bitwise operation where the source pixels are inverted and then XOR'ed with the destination ((NOT src) XOR dst).
QPainter.RasterOp_NotSource 30 Does a bitwise operation where the source pixels are inverted (NOT src).
QPainter.RasterOp_NotSourceAndDestination 31 Does a bitwise operation where the source is inverted and then AND'ed with the destination ((NOT src) AND dst).
QPainter.RasterOp_SourceAndNotDestination 32 Does a bitwise operation where the source is AND'ed with the inverted destination pixels (src AND (NOT dst)).

See also compositionMode(), setCompositionMode(), Composition Modes, and Image Composition Example.

QPainter.PixmapFragmentHint

Constant Value Description
QPainter.OpaqueHint 0x01 Indicates that the pixmap fragments to be drawn are opaque. Opaque fragments are potentially faster to draw.

This enum was introduced or modified in Qt 4.7.

The PixmapFragmentHints type is a typedef for QFlags<PixmapFragmentHint>. It stores an OR combination of PixmapFragmentHint values.

See also QPainter.drawPixmapFragments() and QPainter.PixmapFragment.

QPainter.RenderHint

Renderhints are used to specify flags to QPainter that may or may not be respected by any given engine.

Constant Value Description
QPainter.Antialiasing 0x01 Indicates that the engine should antialias edges of primitives if possible.
QPainter.TextAntialiasing 0x02 Indicates that the engine should antialias text if possible. To forcibly disable antialiasing for text, do not use this hint. Instead, set QFont.NoAntialias on your font's style strategy.
QPainter.SmoothPixmapTransform 0x04 Indicates that the engine should use a smooth pixmap transformation algorithm (such as bilinear) rather than nearest neighbor.
QPainter.HighQualityAntialiasing 0x08 An OpenGL-specific rendering hint indicating that the engine should use fragment programs and offscreen rendering for antialiasing.
QPainter.NonCosmeticDefaultPen 0x10 The engine should interpret pens with a width of 0 (which otherwise enables QPen.isCosmetic()) as being a non-cosmetic pen with a width of 1.

The RenderHints type is a typedef for QFlags<RenderHint>. It stores an OR combination of RenderHint values.

See also renderHints(), setRenderHint(), Rendering Quality, and Concentric Circles Example.

Method Documentation

QPainter.__init__ (self)

Constructs a painter.

See also begin() and end().

QPainter.__init__ (self, QPaintDevice)

Constructs a painter that begins painting the paint device immediately.

This constructor is convenient for short-lived painters, e.g. in a QWidget.paintEvent() and should be used only once. The constructor calls begin() for you and the QPainter destructor automatically calls end().

Here's an example using begin() and end():

 void MyWidget.paintEvent(QPaintEvent *)
 {
     QPainter p;
     p.begin(this);
     p.drawLine(...);        // drawing code
     p.end();
 }

The same example using this constructor:

 void MyWidget.paintEvent(QPaintEvent *)
 {
     QPainter p(this);
     p.drawLine(...);        // drawing code
 }

Since the constructor cannot provide feedback when the initialization of the painter failed you should rather use begin() and end() to paint on external devices, e.g. printers.

See also begin() and end().

QBrush QPainter.background (self)

Returns the current background brush.

See also setBackground() and Settings.

Qt.BGMode QPainter.backgroundMode (self)

Returns the current background mode.

See also setBackgroundMode() and Settings.

bool QPainter.begin (self, QPaintDevice)

Begins painting the paint device and returns true if successful; otherwise returns false.

Notice that all painter settings (setPen(), setBrush() etc.) are reset to default values when begin() is called.

The errors that can occur are serious problems, such as these:

 painter->begin(0); // impossible - paint device cannot be 0

 QPixmap image(0, 0);
 painter->begin(&image); // impossible - image.isNull() == true;

 painter->begin(myWidget);
 painter2->begin(myWidget); // impossible - only one painter at a time

Note that most of the time, you can use one of the constructors instead of begin(), and that end() is automatically done at destruction.

Warning: A paint device can only be painted by one painter at a time.

Warning: Painting on a QImage with the format QImage.Format_Indexed8 is not supported.

See also end() and QPainter().

QPainter.beginNativePainting (self)

Flushes the painting pipeline and prepares for the user issuing commands directly to the underlying graphics context. Must be followed by a call to endNativePainting().

Note that only the states the underlying paint engine changes will be reset to their respective default states. The states we reset may change from release to release. The following states are currently reset in the OpenGL 2 engine:

If, for example, the OpenGL polygon mode is changed by the user inside a beginNativePaint()/endNativePainting() block, it will not be reset to the default state by endNativePainting(). Here is an example that shows intermixing of painter commands and raw OpenGL commands:

 QPainter painter(this);
 painter.fillRect(0, 0, 128, 128, Qt.green);
 painter.beginNativePainting();

 glEnable(GL_SCISSOR_TEST);
 glScissor(0, 0, 64, 64);

 glClearColor(1, 0, 0, 1);
 glClear(GL_COLOR_BUFFER_BIT);

 glDisable(GL_SCISSOR_TEST);

 painter.endNativePainting();

This function was introduced in Qt 4.6.

See also endNativePainting().

QRectF QPainter.boundingRect (self, QRectF rect, int flags, QString text)

Returns the bounding rectangle of the text as it will appear when drawn inside the given rectangle with the specified flags using the currently set font(); i.e the function tells you where the drawText() function will draw when given the same arguments.

If the text does not fit within the given rectangle using the specified flags, the function returns the required rectangle.

The flags argument is a bitwise OR of the following flags:

If several of the horizontal or several of the vertical alignment flags are set, the resulting alignment is undefined.

See also drawText(), Qt.Alignment, and Qt.TextFlag.

QRect QPainter.boundingRect (self, QRect rect, int flags, QString text)

QRectF QPainter.boundingRect (self, QRectF rectangle, QString text, QTextOption option = QTextOption())

QRect QPainter.boundingRect (self, int x, int y, int w, int h, int flags, QString text)

This is an overloaded function.

Returns the bounding rectangle of the text as it will appear when drawn inside the given rectangle with the specified flags using the currently set font().

QBrush QPainter.brush (self)

Returns the painter's current brush.

See also QPainter.setBrush() and Settings.

QPoint QPainter.brushOrigin (self)

Returns the currently set brush origin.

See also setBrushOrigin() and Settings.

QRectF QPainter.clipBoundingRect (self)

Returns the bounding rectangle of the current clip if there is a clip; otherwise returns an empty rectangle. Note that the clip region is given in logical coordinates.

The bounding rectangle is not guaranteed to be tight.

This function was introduced in Qt 4.8.

See also setClipRect(), setClipPath(), and setClipRegion().

QPainterPath QPainter.clipPath (self)

Returns the currently clip as a path. Note that the clip path is given in logical coordinates.

Warning: QPainter does not store the combined clip explicitly as this is handled by the underlying QPaintEngine, so the path is recreated on demand and transformed to the current logical coordinate system. This is potentially an expensive operation.

See also setClipPath(), clipRegion(), and setClipping().

QRegion QPainter.clipRegion (self)

Returns the currently set clip region. Note that the clip region is given in logical coordinates.

Warning: QPainter does not store the combined clip explicitly as this is handled by the underlying QPaintEngine, so the path is recreated on demand and transformed to the current logical coordinate system. This is potentially an expensive operation.

See also setClipRegion(), clipPath(), and setClipping().

QMatrix QPainter.combinedMatrix (self)

QTransform QPainter.combinedTransform (self)

Returns the transformation matrix combining the current window/viewport and world transformation.

See also setWorldTransform(), setWindow(), and setViewport().

CompositionMode QPainter.compositionMode (self)

Returns the current composition mode.

See also CompositionMode and setCompositionMode().

QPaintDevice QPainter.device (self)

Returns the paint device on which this painter is currently painting, or 0 if the painter is not active.

See also isActive().

QMatrix QPainter.deviceMatrix (self)

QTransform QPainter.deviceTransform (self)

Returns the matrix that transforms from logical coordinates to device coordinates of the platform dependent paint device.

This function is only needed when using platform painting commands on the platform dependent handle (Qt.HANDLE), and the platform does not do transformations nativly.

The QPaintEngine.PaintEngineFeature enum can be queried to determine whether the platform performs the transformations or not.

See also worldTransform() and QPaintEngine.hasFeature().

QPainter.drawArc (self, QRectF rect, int a, int alen)

Draws the arc defined by the given rectangle, startAngle and spanAngle.

The startAngle and spanAngle must be specified in 1/16th of a degree, i.e. a full circle equals 5760 (16 * 360). Positive values for the angles mean counter-clockwise while negative values mean the clockwise direction. Zero degrees is at the 3 o'clock position.

 QRectF rectangle(10.0, 20.0, 80.0, 60.0);
 int startAngle = 30 * 16;
 int spanAngle = 120 * 16;

 QPainter painter(this);
 painter.drawArc(rectangle, startAngle, spanAngle);

See also drawPie(), drawChord(), and Coordinate System.

QPainter.drawArc (self, QRect r, int a, int alen)

This is an overloaded function.

Draws the arc defined by the given rectangle, startAngle and spanAngle.

QPainter.drawArc (self, int x, int y, int w, int h, int a, int alen)

This is an overloaded function.

Draws the arc defined by the rectangle beginning at (x, y) with the specified width and height, and the given startAngle and spanAngle.

QPainter.drawChord (self, QRectF rect, int a, int alen)

Draws the chord defined by the given rectangle, startAngle and spanAngle. The chord is filled with the current brush().

The startAngle and spanAngle must be specified in 1/16th of a degree, i.e. a full circle equals 5760 (16 * 360). Positive values for the angles mean counter-clockwise while negative values mean the clockwise direction. Zero degrees is at the 3 o'clock position.

 QRectF rectangle(10.0, 20.0, 80.0, 60.0);
 int startAngle = 30 * 16;
 int spanAngle = 120 * 16;

 QPainter painter(this);
 painter.drawChord(rect, startAngle, spanAngle);

See also drawArc(), drawPie(), and Coordinate System.

QPainter.drawChord (self, QRect rect, int a, int alen)

This is an overloaded function.

Draws the chord defined by the given rectangle, startAngle and spanAngle.

QPainter.drawChord (self, int x, int y, int w, int h, int a, int alen)

This is an overloaded function.

Draws the chord defined by the rectangle beginning at (x, y) with the specified width and height, and the given startAngle and spanAngle.

QPainter.drawConvexPolygon (self, QPointF point, ...)

Draws the convex polygon defined by the first pointCount points in the array points using the current pen.

 static const QPointF points[4] = {
     QPointF(10.0, 80.0),
     QPointF(20.0, 10.0),
     QPointF(80.0, 30.0),
     QPointF(90.0, 70.0)
 };

 QPainter painter(this);
 painter.drawConvexPolygon(points, 4);

The first point is implicitly connected to the last point, and the polygon is filled with the current brush(). If the supplied polygon is not convex, i.e. it contains at least one angle larger than 180 degrees, the results are undefined.

On some platforms (e.g. X11), the drawConvexPolygon() function can be faster than the drawPolygon() function.

See also drawPolygon(), drawPolyline(), and Coordinate System.

QPainter.drawConvexPolygon (self, QPolygonF poly)

This is an overloaded function.

Draws the convex polygon defined by the first pointCount points in the array points using the current pen.

QPainter.drawConvexPolygon (self, QPoint point, ...)

This is an overloaded function.

Draws the convex polygon defined by polygon using the current pen and brush.

QPainter.drawConvexPolygon (self, QPolygon poly)

This is an overloaded function.

Draws the convex polygon defined by polygon using the current pen and brush.

QPainter.drawEllipse (self, QRectF r)

Draws the ellipse defined by the given rectangle.

A filled ellipse has a size of rectangle.size(). A stroked ellipse has a size of rectangle.size() plus the pen width.

 QRectF rectangle(10.0, 20.0, 80.0, 60.0);

 QPainter painter(this);
 painter.drawEllipse(rectangle);

See also drawPie() and Coordinate System.

QPainter.drawEllipse (self, QRect r)

This is an overloaded function.

Draws the ellipse defined by the given rectangle.

QPainter.drawEllipse (self, int x, int y, int w, int h)

This is an overloaded function.

Draws the ellipse defined by the rectangle beginning at (x, y) with the given width and height.

QPainter.drawEllipse (self, QPointF center, float rx, float ry)

This is an overloaded function.

Draws the ellipse positioned at center with radii rx and ry.

This function was introduced in Qt 4.4.

QPainter.drawEllipse (self, QPoint center, int rx, int ry)

This is an overloaded function.

Draws the ellipse positioned at center with radii rx and ry.

This function was introduced in Qt 4.4.

QPainter.drawGlyphRun (self, QPointF position, QGlyphRun glyphRun)

Draws the specified glyphs at the given position. The position gives the edge of the baseline for the string of glyphs. The glyphs will be retrieved from the font selected by glyphs and at offsets given by the positions in glyphs.

This function was introduced in Qt 4.8.

See also QGlyphRun.setRawFont(), QGlyphRun.setPositions(), and QGlyphRun.setGlyphIndexes().

QPainter.drawImage (self, QRectF targetRect, QImage image, QRectF sourceRect, Qt.ImageConversionFlags flags = Qt.AutoColor)

Draws the rectangular portion source of the given image into the target rectangle in the paint device.

Note: The image is scaled to fit the rectangle, if both the image and rectangle size disagree.

If the image needs to be modified to fit in a lower-resolution result (e.g. converting from 32-bit to 8-bit), use the flags to specify how you would prefer this to happen.

 QRectF target(10.0, 20.0, 80.0, 60.0);
 QRectF source(0.0, 0.0, 70.0, 40.0);
 QImage image(":/images/myImage.png");

 QPainter painter(this);
 painter.drawImage(target, image, source);

See also drawPixmap().

QPainter.drawImage (self, QRect targetRect, QImage image, QRect sourceRect, Qt.ImageConversionFlags flags = Qt.AutoColor)

This is an overloaded function.

Draws the rectangular portion source of the given image into the target rectangle in the paint device.

Note: The image is scaled to fit the rectangle, if both the image and rectangle size disagree.

QPainter.drawImage (self, QPointF p, QImage image, QRectF sr, Qt.ImageConversionFlags flags = Qt.AutoColor)

This is an overloaded function.

Draws the given image at the given point.

QPainter.drawImage (self, QPoint p, QImage image, QRect sr, Qt.ImageConversionFlags flags = Qt.AutoColor)

This is an overloaded function.

Draws the given image at the given point.

QPainter.drawImage (self, QRectF r, QImage image)

This is an overloaded function.

Draws the rectangular portion source of the given image with its origin at the given point.

QPainter.drawImage (self, QRect r, QImage image)

This is an overloaded function.

Draws the rectangular portion source of the given image with its origin at the given point.

QPainter.drawImage (self, QPointF p, QImage image)

This is an overloaded function.

Draws the given image into the given rectangle.

Note: The image is scaled to fit the rectangle, if both the image and rectangle size disagree.

QPainter.drawImage (self, QPoint p, QImage image)

This is an overloaded function.

Draws the given image into the given rectangle.

Note: The image is scaled to fit the rectangle, if both the image and rectangle size disagree.

QPainter.drawImage (self, int x, int y, QImage image, int sx = 0, int sy = 0, int sw = -1, int sh = -1, Qt.ImageConversionFlags flags = Qt.AutoColor)

This is an overloaded function.

Draws an image at (x, y) by copying a part of image into the paint device.

(x, y) specifies the top-left point in the paint device that is to be drawn onto. (sx, sy) specifies the top-left point in image that is to be drawn. The default is (0, 0).

(sw, sh) specifies the size of the image that is to be drawn. The default, (0, 0) (and negative) means all the way to the bottom-right of the image.

QPainter.drawLine (self, QLineF l)

Draws a line defined by line.

 QLineF line(10.0, 80.0, 90.0, 20.0);

 QPainter(this);
 painter.drawLine(line);

See also drawLines(), drawPolyline(), and Coordinate System.

QPainter.drawLine (self, QLine line)

This is an overloaded function.

Draws a line defined by line.

QPainter.drawLine (self, int x1, int y1, int x2, int y2)

This is an overloaded function.

Draws a line from p1 to p2.

QPainter.drawLine (self, QPoint p1, QPoint p2)

This is an overloaded function.

Draws a line from p1 to p2.

QPainter.drawLine (self, QPointF p1, QPointF p2)

This is an overloaded function.

Draws a line from (x1, y1) to (x2, y2) and sets the current pen position to (x2, y2).

QPainter.drawLines (self, QLineF line, ...)

Draws the first lineCount lines in the array lines using the current pen.

See also drawLine() and drawPolyline().

QPainter.drawLines (self, unknown-type lines)

This is an overloaded function.

Draws the first lineCount lines in the array lines using the current pen.

QPainter.drawLines (self, QPointF pointPair, ...)

This is an overloaded function.

Draws the first lineCount lines in the array pointPairs using the current pen. The lines are specified as pairs of points so the number of entries in pointPairs must be at least lineCount * 2.

QPainter.drawLines (self, unknown-type pointPairs)

This is an overloaded function.

Draws the first lineCount lines in the array pointPairs using the current pen.

QPainter.drawLines (self, QLine line, ...)

This is an overloaded function.

Draws a line for each pair of points in the vector pointPairs using the current pen. If there is an odd number of points in the array, the last point will be ignored.

QPainter.drawLines (self, unknown-type lines)

This is an overloaded function.

Draws a line for each pair of points in the vector pointPairs using the current pen.

QPainter.drawLines (self, QPoint pointPair, ...)

This is an overloaded function.

Draws the set of lines defined by the list lines using the current pen and brush.

QPainter.drawLines (self, unknown-type pointPairs)

This is an overloaded function.

Draws the set of lines defined by the list lines using the current pen and brush.

QPainter.drawPath (self, QPainterPath path)

Draws the given painter path using the current pen for outline and the current brush for filling.

 QPainterPath path;
 path.moveTo(20, 80);
 path.lineTo(20, 30);
 path.cubicTo(80, 0, 50, 50, 80, 80);

 QPainter painter(this);
 painter.drawPath(path);

See also the Painter Paths example and the Vector Deformation demo.

QPainter.drawPicture (self, QPointF p, QPicture picture)

Replays the given picture at the given point.

The QPicture class is a paint device that records and replays QPainter commands. A picture serializes the painter commands to an IO device in a platform-independent format. Everything that can be painted on a widget or pixmap can also be stored in a picture.

This function does exactly the same as QPicture.play() when called with point = QPoint(0, 0).

 QPicture picture;
 QPointF point(10.0, 20.0)
 picture.load("drawing.pic");

 QPainter painter(this);
 painter.drawPicture(0, 0, picture);

See also QPicture.play().

QPainter.drawPicture (self, int x, int y, QPicture p)

This is an overloaded function.

Replays the given picture at the given point.

QPainter.drawPicture (self, QPoint pt, QPicture p)

This is an overloaded function.

Draws the given picture at point (x, y).

QPainter.drawPie (self, QRectF rect, int a, int alen)

Draws a pie defined by the given rectangle, startAngle and and spanAngle.

The pie is filled with the current brush().

The startAngle and spanAngle must be specified in 1/16th of a degree, i.e. a full circle equals 5760 (16 * 360). Positive values for the angles mean counter-clockwise while negative values mean the clockwise direction. Zero degrees is at the 3 o'clock position.

 QRectF rectangle(10.0, 20.0, 80.0, 60.0);
 int startAngle = 30 * 16;
 int spanAngle = 120 * 16;

 QPainter painter(this);
 painter.drawPie(rectangle, startAngle, spanAngle);

See also drawEllipse(), drawChord(), and Coordinate System.

QPainter.drawPie (self, QRect rect, int a, int alen)

This is an overloaded function.

Draws a pie defined by the given rectangle, startAngle and and spanAngle.

QPainter.drawPie (self, int x, int y, int w, int h, int a, int alen)

This is an overloaded function.

Draws the pie defined by the rectangle beginning at (x, y) with the specified width and height, and the given startAngle and spanAngle.

QPainter.drawPixmap (self, QRectF targetRect, QPixmap pixmap, QRectF sourceRect)

Draws the rectangular portion source of the given pixmap into the given target in the paint device.

Note: The pixmap is scaled to fit the rectangle, if both the pixmap and rectangle size disagree.

 QRectF target(10.0, 20.0, 80.0, 60.0);
 QRectF source(0.0, 0.0, 70.0, 40.0);
 QPixmap pixmap(":myPixmap.png");

 QPainter(this);
 painter.drawPixmap(target, image, source);

If pixmap is a QBitmap it is drawn with the bits that are "set" using the pens color. If backgroundMode is Qt.OpaqueMode, the "unset" bits are drawn using the color of the background brush; if backgroundMode is Qt.TransparentMode, the "unset" bits are transparent. Drawing bitmaps with gradient or texture colors is not supported.

See also drawImage().

QPainter.drawPixmap (self, QRect targetRect, QPixmap pixmap, QRect sourceRect)

This is an overloaded function.

Draws the rectangular portion source of the given pixmap into the given target in the paint device.

Note: The pixmap is scaled to fit the rectangle, if both the pixmap and rectangle size disagree.

QPainter.drawPixmap (self, QPointF p, QPixmap pm)

This is an overloaded function.

Draws the rectangular portion source of the given pixmap with its origin at the given point.

QPainter.drawPixmap (self, QPoint p, QPixmap pm)

This is an overloaded function.

Draws the rectangular portion source of the given pixmap with its origin at the given point.

QPainter.drawPixmap (self, QRect r, QPixmap pm)

This is an overloaded function.

Draws the given pixmap with its origin at the given point.

QPainter.drawPixmap (self, int x, int y, QPixmap pm)

This is an overloaded function.

Draws the given pixmap with its origin at the given point.

QPainter.drawPixmap (self, int x, int y, int w, int h, QPixmap pm)

This is an overloaded function.

Draws the given pixmap at position (x, y).

QPainter.drawPixmap (self, int x, int y, int w, int h, QPixmap pm, int sx, int sy, int sw, int sh)

This is an overloaded function.

Draws the given pixmap into the given rectangle.

Note: The pixmap is scaled to fit the rectangle, if both the pixmap and rectangle size disagree.

QPainter.drawPixmap (self, int x, int y, QPixmap pm, int sx, int sy, int sw, int sh)

This is an overloaded function.

Draws the pixmap into the rectangle at position (x, y) with the given width and height.

QPainter.drawPixmap (self, QPointF p, QPixmap pm, QRectF sr)

This is an overloaded function.

Draws the rectangular portion with the origin (sx, sy), width sw and height sh, of the given pixmap , at the point (x, y), with a width of w and a height of h. If sw or sh are equal to zero the width/height of the pixmap is used and adjusted by the offset sx/sy;

QPainter.drawPixmap (self, QPoint p, QPixmap pm, QRect sr)

This is an overloaded function.

Draws a pixmap at (x, y) by copying a part of the given pixmap into the paint device.

(x, y) specifies the top-left point in the paint device that is to be drawn onto. (sx, sy) specifies the top-left point in pixmap that is to be drawn. The default is (0, 0).

(sw, sh) specifies the size of the pixmap that is to be drawn. The default, (0, 0) (and negative) means all the way to the bottom-right of the pixmap.

QPainter.drawPixmapFragments (self, list fragments, QPixmap pixmap, PixmapFragmentHints hints = 0)

This function is used to draw pixmap, or a sub-rectangle of pixmap, at multiple positions with different scale, rotation and opacity. fragments is an array of fragmentCount elements specifying the parameters used to draw each pixmap fragment. The hints parameter can be used to pass in drawing hints.

This function is potentially faster than multiple calls to drawPixmap(), since the backend can optimize state changes.

This function was introduced in Qt 4.7.

See also QPainter.PixmapFragment and QPainter.PixmapFragmentHint.

QPainter.drawPixmapFragments (self, list targetRects, list sourceRects, QPixmap pixmap, PixmapFragmentHints hints = 0)

The sourceRects argument may also be None.

This function is used to draw the same pixmap with multiple target and source rectangles specified by targetRects. If sourceRects is 0, the whole pixmap will be rendered at each of the target rectangles. The hints parameter can be used to pass in drawing hints.

This function is potentially faster than multiple calls to drawPixmap(), since the backend can optimize state changes.

This function was introduced in Qt 4.8.

See also QPainter.PixmapFragmentHint.

QPainter.drawPoint (self, QPointF p)

Draws a single point at the given position using the current pen's color.

See also Coordinate System.

QPainter.drawPoint (self, int x, int y)

This is an overloaded function.

Draws a single point at the given position using the current pen's color.

QPainter.drawPoint (self, QPoint p)

This is an overloaded function.

Draws a single point at position (x, y).

QPainter.drawPoints (self, QPointF point, ...)

Draws the first pointCount points in the array points using the current pen's color.

See also Coordinate System.

QPainter.drawPoints (self, QPolygonF points)

This is an overloaded function.

Draws the first pointCount points in the array points using the current pen's color.

QPainter.drawPoints (self, QPoint point, ...)

This is an overloaded function.

Draws the points in the vector points.

QPainter.drawPoints (self, QPolygon points)

This is an overloaded function.

Draws the points in the vector points.

QPainter.drawPolygon (self, QPointF point, ...)

Draws the polygon defined by the first pointCount points in the array points using the current pen and brush.

 static const QPointF points[4] = {
     QPointF(10.0, 80.0),
     QPointF(20.0, 10.0),
     QPointF(80.0, 30.0),
     QPointF(90.0, 70.0)
 };

 QPainter painter(this);
 painter.drawPolygon(points, 4);

The first point is implicitly connected to the last point, and the polygon is filled with the current brush().

If fillRule is Qt.WindingFill, the polygon is filled using the winding fill algorithm. If fillRule is Qt.OddEvenFill, the polygon is filled using the odd-even fill algorithm. See Qt.FillRule for a more detailed description of these fill rules.

See also drawConvexPolygon(), drawPolyline(), and Coordinate System.

QPainter.drawPolygon (self, QPolygonF points, Qt.FillRule fillRule = Qt.OddEvenFill)

This is an overloaded function.

Draws the polygon defined by the first pointCount points in the array points.

QPainter.drawPolygon (self, QPoint point, ...)

QPainter.drawPolygon (self, QPolygon points, Qt.FillRule fillRule = Qt.OddEvenFill)

QPainter.drawPolyline (self, QPointF point, ...)

Draws the polyline defined by the first pointCount points in points using the current pen.

Note that unlike the drawPolygon() function the last point is not connected to the first, neither is the polyline filled.

 static const QPointF points[3] = {
     QPointF(10.0, 80.0),
     QPointF(20.0, 10.0),
     QPointF(80.0, 30.0),
 };

 QPainter painter(this);
 painter.drawPolyline(points, 3);

See also drawLines(), drawPolygon(), and Coordinate System.

QPainter.drawPolyline (self, QPolygonF polyline)

This is an overloaded function.

Draws the polyline defined by the first pointCount points in points using the current pen.

QPainter.drawPolyline (self, QPoint point, ...)

QPainter.drawPolyline (self, QPolygon polyline)

This is an overloaded function.

Draws the polyline defined by the given points using the current pen.

QPainter.drawRect (self, QRectF rect)

Draws the current rectangle with the current pen and brush.

A filled rectangle has a size of rectangle.size(). A stroked rectangle has a size of rectangle.size() plus the pen width.

 QRectF rectangle(10.0, 20.0, 80.0, 60.0);

 QPainter painter(this);
 painter.drawRect(rectangle);

See also drawRects(), drawPolygon(), and Coordinate System.

QPainter.drawRect (self, int x, int y, int w, int h)

This is an overloaded function.

Draws the current rectangle with the current pen and brush.

QPainter.drawRect (self, QRect r)

This is an overloaded function.

Draws a rectangle with upper left corner at (x, y) and with the given width and height.

QPainter.drawRects (self, QRectF rect, ...)

Draws the first rectCount of the given rectangles using the current pen and brush.

See also drawRect().

QPainter.drawRects (self, unknown-type rects)

This is an overloaded function.

Draws the first rectCount of the given rectangles using the current pen and brush.

QPainter.drawRects (self, QRect rect, ...)

This is an overloaded function.

Draws the given rectangles using the current pen and brush.

QPainter.drawRects (self, unknown-type rects)

This is an overloaded function.

Draws the given rectangles using the current pen and brush.

QPainter.drawRoundedRect (self, QRectF rect, float xRadius, float yRadius, Qt.SizeMode mode = Qt.AbsoluteSize)

Draws the given rectangle rect with rounded corners.

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.

A filled rectangle has a size of rect.size(). A stroked rectangle has a size of rect.size() plus the pen width.

 QRectF rectangle(10.0, 20.0, 80.0, 60.0);

 QPainter painter(this);
 painter.drawRoundedRect(rectangle, 20.0, 15.0);

This function was introduced in Qt 4.4.

See also drawRect() and QPen.

QPainter.drawRoundedRect (self, int x, int y, int w, int h, float xRadius, float yRadius, Qt.SizeMode mode = Qt.AbsoluteSize)

This is an overloaded function.

Draws the given rectangle rect with rounded corners.

This function was introduced in Qt 4.4.

QPainter.drawRoundedRect (self, QRect rect, float xRadius, float yRadius, Qt.SizeMode mode = Qt.AbsoluteSize)

This is an overloaded function.

Draws the given rectangle x, y, w, h with rounded corners.

This function was introduced in Qt 4.4.

QPainter.drawRoundRect (self, QRectF r, int xRound = 25, int yRound = 25)

QPainter.drawRoundRect (self, int x, int y, int w, int h, int xRound = 25, int yRound = 25)

QPainter.drawRoundRect (self, QRect r, int xRound = 25, int yRound = 25)

QPainter.drawStaticText (self, QPointF topLeftPosition, QStaticText staticText)

Draws the given staticText at the given topLeftPosition.

The text will be drawn using the font and the transformation set on the painter. If the font and/or transformation set on the painter are different from the ones used to initialize the layout of the QStaticText, then the layout will have to be recalculated. Use QStaticText.prepare() to initialize staticText with the font and transformation with which it will later be drawn.

If topLeftPosition is not the same as when staticText was initialized, or when it was last drawn, then there will be a slight overhead when translating the text to its new position.

Note: If the painter's transformation is not affine, then staticText will be drawn using regular calls to drawText(), losing any potential for performance improvement.

Note: The y-position is used as the top of the font.

This function was introduced in Qt 4.7.

See also QStaticText.

QPainter.drawStaticText (self, QPoint p, QStaticText staticText)

This is an overloaded function.

Draws the staticText at the topLeftPosition.

Note: The y-position is used as the top of the font.

This function was introduced in Qt 4.7.

QPainter.drawStaticText (self, int x, int y, QStaticText staticText)

This is an overloaded function.

Draws the staticText at coordinates left and top.

Note: The y-position is used as the top of the font.

This function was introduced in Qt 4.7.

QPainter.drawText (self, QPointF p, QString s)

Draws the given text with the currently defined text direction, beginning at the given position.

This function does not handle the newline character (\n), as it cannot break text into multiple lines, and it cannot display the newline character. Use the QPainter.drawText() overload that takes a rectangle instead if you want to draw multiple lines of text with the newline character, or if you want the text to be wrapped.

By default, QPainter draws text anti-aliased.

Note: The y-position is used as the baseline of the font.

QRectF boundingRect QPainter.drawText (self, QRectF rectangle, int flags, QString text)

QRect boundingRect QPainter.drawText (self, QRect rectangle, int flags, QString text)

QPainter.drawText (self, QRectF rectangle, QString text, QTextOption option = QTextOption())

QPainter.drawText (self, QPoint p, QString s)

QRect boundingRect QPainter.drawText (self, int x, int y, int width, int height, int flags, QString text)

QPainter.drawText (self, int x, int y, QString s)

QPainter.drawTiledPixmap (self, QRectF rectangle, QPixmap pixmap, QPointF pos = QPointF())

Draws a tiled pixmap, inside the given rectangle with its origin at the given position.

Calling drawTiledPixmap() is similar to calling drawPixmap() several times to fill (tile) an area with a pixmap, but is potentially much more efficient depending on the underlying window system.

See also drawPixmap().

QPainter.drawTiledPixmap (self, QRect rectangle, QPixmap pixmap, QPoint pos = QPoint())

This is an overloaded function.

Draws a tiled pixmap, inside the given rectangle with its origin at the given position.

QPainter.drawTiledPixmap (self, int x, int y, int width, int height, QPixmap pixmap, int sx = 0, int sy = 0)

This is an overloaded function.

Draws a tiled pixmap in the specified rectangle.

(x, y) specifies the top-left point in the paint device that is to be drawn onto; with the given width and height. (sx, sy) specifies the top-left point in the pixmap that is to be drawn; this defaults to (0, 0).

bool QPainter.end (self)

Ends painting. Any resources used while painting are released. You don't normally need to call this since it is called by the destructor.

Returns true if the painter is no longer active; otherwise returns false.

See also begin() and isActive().

QPainter.endNativePainting (self)

Restores the painter after manually issuing native painting commands. Lets the painter restore any native state that it relies on before calling any other painter commands.

This function was introduced in Qt 4.6.

See also beginNativePainting().

QPainter.eraseRect (self, QRectF)

Erases the area inside the given rectangle. Equivalent to calling

 fillRect(rectangle, background()).

See also fillRect().

QPainter.eraseRect (self, QRect rect)

This is an overloaded function.

Erases the area inside the given rectangle.

QPainter.eraseRect (self, int x, int y, int w, int h)

This is an overloaded function.

Erases the area inside the rectangle beginning at (x, y) with the given width and height.

QPainter.fillPath (self, QPainterPath path, QBrush brush)

Fills the given path using the given brush. The outline is not drawn.

Alternatively, you can specify a QColor instead of a QBrush; the QBrush constructor (taking a QColor argument) will automatically create a solid pattern brush.

See also drawPath().

QPainter.fillRect (self, QRectF, QBrush)

Fills the given rectangle with the brush specified.

Alternatively, you can specify a QColor instead of a QBrush; the QBrush constructor (taking a QColor argument) will automatically create a solid pattern brush.

See also drawRect().

QPainter.fillRect (self, QRect, QBrush)

This is an overloaded function.

Fills the rectangle beginning at (x, y) with the given width and height, using the brush style specified.

This function was introduced in Qt 4.5.

QPainter.fillRect (self, int x, int y, int w, int h, QBrush b)

This is an overloaded function.

Fills the given rectangle with the brush style specified.

This function was introduced in Qt 4.5.

QPainter.fillRect (self, QRectF, QColor color)

This is an overloaded function.

Fills the given rectangle with the brush style specified.

This function was introduced in Qt 4.5.

QPainter.fillRect (self, QRect, QColor color)

This is an overloaded function.

Fills the given rectangle with the specified brush.

QPainter.fillRect (self, int x, int y, int w, int h, QColor b)

This is an overloaded function.

Fills the given rectangle with the color specified.

This function was introduced in Qt 4.5.

QPainter.fillRect (self, int x, int y, int w, int h, Qt.GlobalColor c)

This is an overloaded function.

Fills the given rectangle with the color specified.

This function was introduced in Qt 4.5.

QPainter.fillRect (self, QRect r, Qt.GlobalColor c)

This is an overloaded function.

Fills the rectangle beginning at (x, y) with the given width and height, using the given brush.

QPainter.fillRect (self, QRectF r, Qt.GlobalColor c)

This is an overloaded function.

Fills the rectangle beginning at (x, y) with the given width and height, using the given color.

This function was introduced in Qt 4.5.

QPainter.fillRect (self, int x, int y, int w, int h, Qt.BrushStyle style)

This is an overloaded function.

Fills the rectangle beginning at (x, y) with the given width and height, using the given color.

This function was introduced in Qt 4.5.

QPainter.fillRect (self, QRect r, Qt.BrushStyle style)

This is an overloaded function.

Fills the given rectangle with the specified color.

This function was introduced in Qt 4.5.

QPainter.fillRect (self, QRectF r, Qt.BrushStyle style)

This is an overloaded function.

Fills the given rectangle with the specified color.

This function was introduced in Qt 4.5.

QFont QPainter.font (self)

Returns the currently set font used for drawing text.

See also setFont(), drawText(), and Settings.

QFontInfo QPainter.fontInfo (self)

Returns the font info for the painter if the painter is active. Otherwise, the return value is undefined.

See also font(), isActive(), and Settings.

QFontMetrics QPainter.fontMetrics (self)

Returns the font metrics for the painter if the painter is active. Otherwise, the return value is undefined.

See also font(), isActive(), and Settings.

bool QPainter.hasClipping (self)

Returns true if clipping has been set; otherwise returns false.

See also setClipping() and Clipping.

QPainter.initFrom (self, QWidget widget)

Initializes the painters pen, background and font to the same as the given widget. This function is called automatically when the painter is opened on a QWidget.

See also begin() and Settings.

bool QPainter.isActive (self)

Returns true if begin() has been called and end() has not yet been called; otherwise returns false.

See also begin() and QPaintDevice.paintingActive().

Qt.LayoutDirection QPainter.layoutDirection (self)

Returns the layout direction used by the painter when drawing text.

See also QTextOption.textDirection(), setLayoutDirection(), drawText(), and Settings.

QMatrix QPainter.matrix (self)

bool QPainter.matrixEnabled (self)

float QPainter.opacity (self)

Returns the opacity of the painter. The default value is 1.

This function was introduced in Qt 4.2.

See also setOpacity().

QPaintEngine QPainter.paintEngine (self)

Returns the paint engine that the painter is currently operating on if the painter is active; otherwise 0.

See also isActive().

QPen QPainter.pen (self)

Returns the painter's current pen.

See also setPen() and Settings.

QPaintDevice QPainter.redirected (QPaintDevice device, QPoint offset = None)

RenderHints QPainter.renderHints (self)

Returns a flag that specifies the rendering hints that are set for this painter.

See also setRenderHints(), testRenderHint(), and Rendering Quality.

QPainter.resetMatrix (self)

QPainter.resetTransform (self)

Resets any transformations that were made using translate(), scale(), shear(), rotate(), setWorldTransform(), setViewport() and setWindow().

See also Coordinate Transformations.

QPainter.restore (self)

Restores the current painter state (pops a saved state off the stack).

See also save().

QPainter.restoreRedirected (QPaintDevice device)

QPainter.rotate (self, float a)

Rotates the coordinate system the given angle clockwise.

See also setWorldTransform() and Coordinate Transformations.

QPainter.save (self)

Saves the current painter state (pushes the state onto a stack). A save() must be followed by a corresponding restore(); the end() function unwinds the stack.

See also restore().

QPainter.scale (self, float sx, float sy)

Scales the coordinate system by (sx, sy).

See also setWorldTransform() and Coordinate Transformations.

QPainter.setBackground (self, QBrush bg)

Sets the background brush of the painter to the given brush.

The background brush is the brush that is filled in when drawing opaque text, stippled lines and bitmaps. The background brush has no effect in transparent background mode (which is the default).

See also background(), setBackgroundMode(), and Settings.

QPainter.setBackgroundMode (self, Qt.BGMode mode)

Sets the background mode of the painter to the given mode

Qt.TransparentMode (the default) draws stippled lines and text without setting the background pixels. Qt.OpaqueMode fills these space with the current background color.

Note that in order to draw a bitmap or pixmap transparently, you must use QPixmap.setMask().

See also backgroundMode(), setBackground(), and Settings.

QPainter.setBrush (self, QBrush brush)

Sets the painter's brush to the given brush.

The painter's brush defines how shapes are filled.

See also brush() and Settings.

QPainter.setBrush (self, Qt.BrushStyle style)

This is an overloaded function.

Sets the painter's brush to black color and the specified style.

QPainter.setBrushOrigin (self, QPointF)

Sets the brush origin to position.

The brush origin specifies the (0, 0) coordinate of the painter's brush.

Note that while the brushOrigin() was necessary to adopt the parent's background for a widget in Qt 3, this is no longer the case since the Qt 4 painter doesn't paint the background unless you explicitly tell it to do so by setting the widget's autoFillBackground property to true.

See also brushOrigin() and Settings.

QPainter.setBrushOrigin (self, int x, int y)

This is an overloaded function.

Sets the brush's origin to the given position.

QPainter.setBrushOrigin (self, QPoint p)

This is an overloaded function.

Sets the brush's origin to point (x, y).

QPainter.setClipPath (self, QPainterPath path, Qt.ClipOperation operation = Qt.ReplaceClip)

Enables clipping, and sets the clip path for the painter to the given path, with the clip operation.

Note that the clip path is specified in logical (painter) coordinates.

See also clipPath(), clipRegion(), and Clipping.

QPainter.setClipping (self, bool enable)

Enables clipping if enable is true, or disables clipping if enable is false.

See also hasClipping() and Clipping.

QPainter.setClipRect (self, QRectF rectangle, Qt.ClipOperation operation = Qt.ReplaceClip)

Enables clipping, and sets the clip region to the given rectangle using the given clip operation. The default operation is to replace the current clip rectangle.

Note that the clip rectangle is specified in logical (painter) coordinates.

See also clipRegion(), setClipping(), and Clipping.

QPainter.setClipRect (self, int x, int y, int width, int height, Qt.ClipOperation operation = Qt.ReplaceClip)

Enables clipping, and sets the clip region to the rectangle beginning at (x, y) with the given width and height.

QPainter.setClipRect (self, QRect rectangle, Qt.ClipOperation operation = Qt.ReplaceClip)

This is an overloaded function.

Enables clipping, and sets the clip region to the given rectangle using the given clip operation.

QPainter.setClipRegion (self, QRegion region, Qt.ClipOperation operation = Qt.ReplaceClip)

Sets the clip region to the given region using the specified clip operation. The default clip operation is to replace the current clip region.

Note that the clip region is given in logical coordinates.

See also clipRegion(), setClipRect(), and Clipping.

QPainter.setCompositionMode (self, CompositionMode mode)

Sets the composition mode to the given mode.

Warning: Only a QPainter operating on a QImage fully supports all composition modes. The RasterOp modes are supported for X11 as described in compositionMode().

See also compositionMode().

QPainter.setFont (self, QFont f)

Sets the painter's font to the given font.

This font is used by subsequent drawText() functions. The text color is the same as the pen color.

If you set a font that isn't available, Qt finds a close match. font() will return what you set using setFont() and fontInfo() returns the font actually being used (which may be the same).

See also font(), drawText(), and Settings.

QPainter.setLayoutDirection (self, Qt.LayoutDirection direction)

Sets the layout direction used by the painter when drawing text, to the specified direction.

The default is Qt.LayoutDirectionAuto, which will implicitly determine the direction from the text drawn.

See also QTextOption.setTextDirection(), layoutDirection(), drawText(), and Settings.

QPainter.setMatrix (self, QMatrix matrix, bool combine = False)

QPainter.setMatrixEnabled (self, bool enabled)

QPainter.setOpacity (self, float opacity)

Sets the opacity of the painter to opacity. The value should be in the range 0.0 to 1.0, where 0.0 is fully transparent and 1.0 is fully opaque.

Opacity set on the painter will apply to all drawing operations individually.

This function was introduced in Qt 4.2.

See also opacity().

QPainter.setPen (self, QColor color)

Sets the painter's pen to be the given pen.

The pen defines how to draw lines and outlines, and it also defines the text color.

See also pen() and Settings.

QPainter.setPen (self, QPen pen)

This is an overloaded function.

Sets the painter's pen to have style Qt.SolidLine, width 0 and the specified color.

QPainter.setPen (self, Qt.PenStyle style)

This is an overloaded function.

Sets the painter's pen to have the given style, width 0 and black color.

QPainter.setRedirected (QPaintDevice device, QPaintDevice replacement, QPoint offset = QPoint())

QPainter.setRenderHint (self, RenderHint hint, bool on = True)

Sets the given render hint on the painter if on is true; otherwise clears the render hint.

See also setRenderHints(), renderHints(), and Rendering Quality.

QPainter.setRenderHints (self, RenderHints hints, bool on = True)

Sets the given render hints on the painter if on is true; otherwise clears the render hints.

This function was introduced in Qt 4.2.

See also setRenderHint(), renderHints(), and Rendering Quality.

QPainter.setTransform (self, QTransform transform, bool combine = False)

Sets the world transformation matrix. If combine is true, the specified transform is combined with the current matrix; otherwise it replaces the current matrix.

This function was introduced in Qt 4.3.

See also transform() and setWorldTransform().

QPainter.setViewport (self, QRect viewport)

Sets the painter's viewport rectangle to the given rectangle, and enables view transformations.

The viewport rectangle is part of the view transformation. The viewport specifies the device coordinate system. Its sister, the window(), specifies the logical coordinate system.

The default viewport rectangle is the same as the device's rectangle.

See also viewport(), viewTransformEnabled(), and Window-Viewport Conversion.

QPainter.setViewport (self, int x, int y, int w, int h)

This is an overloaded function.

Sets the painter's viewport rectangle to be the rectangle beginning at (x, y) with the given width and height.

QPainter.setViewTransformEnabled (self, bool enable)

Enables view transformations if enable is true, or disables view transformations if enable is false.

See also viewTransformEnabled() and Window-Viewport Conversion.

QPainter.setWindow (self, QRect window)

Sets the painter's window to the given rectangle, and enables view transformations.

The window rectangle is part of the view transformation. The window specifies the logical coordinate system. Its sister, the viewport(), specifies the device coordinate system.

The default window rectangle is the same as the device's rectangle.

See also window(), viewTransformEnabled(), and Window-Viewport Conversion.

QPainter.setWindow (self, int x, int y, int w, int h)

This is an overloaded function.

Sets the painter's window to the rectangle beginning at (x, y) and the given width and height.

QPainter.setWorldMatrix (self, QMatrix matrix, bool combine = False)

QPainter.setWorldMatrixEnabled (self, bool enabled)

Enables transformations if enable is true, or disables transformations if enable is false. The world transformation matrix is not changed.

This function was introduced in Qt 4.2.

See also worldMatrixEnabled(), worldTransform(), and Coordinate Transformations.

QPainter.setWorldTransform (self, QTransform matrix, bool combine = False)

Sets the world transformation matrix. If combine is true, the specified matrix is combined with the current matrix; otherwise it replaces the current matrix.

See also worldTransform(), transform(), and setTransform().

QPainter.shear (self, float sh, float sv)

Shears the coordinate system by (sh, sv).

See also setWorldTransform() and Coordinate Transformations.

QPainter.strokePath (self, QPainterPath path, QPen pen)

Draws the outline (strokes) the path path with the pen specified by pen

See also fillPath() and Drawing.

bool QPainter.testRenderHint (self, RenderHint hint)

Returns true if hint is set; otherwise returns false.

This function was introduced in Qt 4.3.

See also renderHints() and setRenderHint().

QTransform QPainter.transform (self)

Returns the world transformation matrix.

See also setTransform() and worldTransform().

QPainter.translate (self, QPointF offset)

Translates the coordinate system by the given offset; i.e. the given offset is added to points.

See also setWorldTransform() and Coordinate Transformations.

QPainter.translate (self, float dx, float dy)

This is an overloaded function.

Translates the coordinate system by the given offset.

QPainter.translate (self, QPoint offset)

This is an overloaded function.

Translates the coordinate system by the vector (dx, dy).

QRect QPainter.viewport (self)

Returns the viewport rectangle.

See also setViewport() and setViewTransformEnabled().

bool QPainter.viewTransformEnabled (self)

Returns true if view transformation is enabled; otherwise returns false.

See also setViewTransformEnabled() and worldTransform().

QRect QPainter.window (self)

Returns the window rectangle.

See also setWindow() and setViewTransformEnabled().

QMatrix QPainter.worldMatrix (self)

bool QPainter.worldMatrixEnabled (self)

Returns true if world transformation is enabled; otherwise returns false.

This function was introduced in Qt 4.2.

See also setWorldMatrixEnabled(), worldTransform(), and Coordinate System.

QTransform QPainter.worldTransform (self)

Returns the world transformation matrix.

See also setWorldTransform().

object QPainter.__enter__ (self)

QPainter.__exit__ (self, object type, object value, object traceback)

PyQt 4.12.1 for X11Copyright © Riverbank Computing Ltd and The Qt Company 2015Qt 4.8.7