QPainter

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

Inheritance diagram of PySide2.QtGui.QPainter

Inherited by: QStylePainter

Synopsis

Functions

Static functions

Detailed Description

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:

def paintEvent(self, paintEvent):
    painter = QPainter(self)
    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().

Settings

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

  • font() is the font used for drawing text. If the painter isActive() , you can retrieve information about the currently set font, and its metrics, using the fontInfo() and fontMetrics() functions respectively.

  • brush() defines the color or pattern that is used for filling shapes.

  • pen() defines the color or stipple that is used for drawing lines or boundaries.

  • backgroundMode() defines whether there is a background() or not, i.e it is either OpaqueMode or TransparentMode .

  • background() only applies when backgroundMode() is OpaqueMode and pen() is a stipple. In that case, it describes the color of the background pixels in the stipple.

  • brushOrigin() defines the origin of the tiled brushes, normally the origin of widget’s background.

  • viewport() , window() , worldTransform() make up the painter’s coordinate transformation system. For more information, see the Coordinate Transformations section and the Coordinate System documentation.

  • hasClipping() tells whether the painter clips at all. (The paint device clips, too.) If the painter clips, it clips to clipRegion() .

  • layoutDirection() defines the layout direction used by the painter when drawing text.

  • worldMatrixEnabled() tells whether world transformation is enabled.

  • viewTransformEnabled() tells whether view transformation is enabled.

Note that some of these settings mirror settings in some paint devices, e.g. font() . The 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.

qpainter-basicdrawing1

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-painterpaths2

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 example which shows how to use advanced vector techniques to draw text using a QPainterPath , the Gradients example which shows the different types of gradients that are available in Qt, and the Path Stroking example 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

qpainter-vectordeformation3

qpainter-gradients4

qpainter-pathstroking5

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

Drawing Pixmaps and Images

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.

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.

Drawing High Resolution Versions of Pixmaps and Images

High resolution versions of pixmaps have a device pixel ratio value larger than 1 (see QImageReader , devicePixelRatio() ). Should it match the value of the underlying QPaintDevice , it is drawn directly onto the device with no additional transformation applied.

This is for example the case when drawing a QPixmap of 64x64 pixels size with a device pixel ratio of 2 onto a high DPI screen which also has a device pixel ratio of 2. Note that the pixmap is then effectively 32x32 pixels in user space . Code paths in Qt that calculate layout geometry based on the pixmap size will use this size. The net effect of this is that the pixmap is displayed as high DPI pixmap rather than a large pixmap.

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 Antialiasing render hint.

qpainter-concentriccircles6

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. Antialiasing indicates that the engine should antialias edges of primitives if possible, TextAntialiasing indicates that the engine should antialias text if possible, and the SmoothPixmapTransform indicates that the engine should use a smooth pixmap transformation algorithm.

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()

qpainter-clock7

qpainter-rotation8

qpainter-scale9

qpainter-translation10

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 example 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 Example

The Affine Transformations example shows 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.

qpainter-affinetransformations11

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, effectively clearing those, while the primitive only overwrites its own area.

qpainter-compositiondemo12

Composition Modes Example

The Composition Modes example, available in Qt’s examples 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 +/- 2 15 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:

  • Raster - This backend implements all rendering in pure software and is always used to render into QImages. For optimal performance only use the format types Format_ARGB32_Premultiplied , Format_RGB32 or Format_RGB16 . Any other format, including Format_ARGB32 , has significantly worse performance. This engine is used by default for QWidget and QPixmap .

  • OpenGL 2.0 (ES) - This backend is the primary backend for hardware accelerated graphics. It can be run on desktop machines and embedded devices supporting the OpenGL 2.0 or OpenGL/ES 2.0 specification. This includes most graphics chips produced in the last couple of years. The engine can be enabled by using QPainter onto a QOpenGLWidget .

These operations are:

  • Simple transformations, meaning translation and scaling, pluss 0, 90, 180, 270 degree rotations.

  • drawPixmap() in combination with simple transformations and opacity with non-smooth transformation mode (QPainter::SmoothPixmapTransform not enabled as a render hint).

  • Rectangle fills with solid color, two-color linear gradients and simple transforms.

  • Rectangular clipping with simple transformations and intersect clip.

  • Composition Modes QPainter::CompositionMode_Source and CompositionMode_SourceOver .

  • Rounded rectangle filling using solid color and two-color linear gradients fills.

  • 3x3 patched pixmaps, via .

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 .

See also

QPaintDevice QPaintEngine Qt SVG Basic Drawing Example Drawing Utility Functions

class PySide2.QtGui.QPainter

PySide2.QtGui.QPainter(arg__1)

param arg__1:

PySide2.QtGui.QPaintDevice

Constructs a painter.

See also

begin() end()

Constructs a painter that begins painting the paint device immediately.

This constructor is convenient for short-lived painters, e.g. in a 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() :

def paintEvent(self, paintEvent):
    p = QPainter()
    p.begin(self)
    p.drawLine(...)         # drawing code
    p.end()

The same example using this constructor:

self paintEvent(self, paintEvent):
    p = QPainter(self)
    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() end()

PySide2.QtGui.QPainter.RenderHint

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

Constant

Description

QPainter.Antialiasing

Indicates that the engine should antialias edges of primitives if possible.

QPainter.TextAntialiasing

Indicates that the engine should antialias text if possible. To forcibly disable antialiasing for text, do not use this hint. Instead, set NoAntialias on your font’s style strategy.

QPainter.SmoothPixmapTransform

Indicates that the engine should use a smooth pixmap transformation algorithm (such as bilinear) rather than nearest neighbor.

QPainter.HighQualityAntialiasing

This value is obsolete and will be ignored, use the Antialiasing render hint instead.

QPainter.NonCosmeticDefaultPen

This value is obsolete, the default for QPen is now non-cosmetic.

QPainter.Qt4CompatiblePainting

Compatibility hint telling the engine to use the same X11 based fill rules as in Qt 4, where aliased rendering is offset by slightly less than half a pixel. Also will treat default constructed pens as cosmetic. Potentially useful when porting a Qt 4 application to Qt 5.

QPainter.LosslessImageRendering

Use a lossless image rendering, whenever possible. Currently, this hint is only used when QPainter is employed to output a PDF file through QPrinter or QPdfWriter , where drawImage() / drawPixmap() calls will encode images using a lossless compression algorithm instead of lossy JPEG compression. This value was added in Qt 5.13.

See also

renderHints() setRenderHint() Rendering Quality Concentric Circles Example

PySide2.QtGui.QPainter.PixmapFragmentHint

Constant

Description

QPainter.OpaqueHint

Indicates that the pixmap fragments to be drawn are opaque. Opaque fragments are potentially faster to draw.

See also

drawPixmapFragments() PixmapFragment

New in version 4.7.

PySide2.QtGui.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 Antialiasing render hint will effectively disable the RasterOp modes.

../../_images/qpainter-compositionmode1.png ../../_images/qpainter-compositionmode2.png

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.

Several composition modes require an alpha channel in the source or target images to have an effect. For optimal performance the image format Format_ARGB32_Premultiplied is preferred.

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

Constant

Description

QPainter.CompositionMode_SourceOver

This is the default mode. The alpha of the source is used to blend the pixel on top of the destination.

QPainter.CompositionMode_DestinationOver

The alpha of the destination is used to blend it on top of the source pixels. This mode is the inverse of .

QPainter.CompositionMode_Clear

The pixels in the destination are cleared (set to fully transparent) independent of the source.

QPainter.CompositionMode_Source

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

The output is the destination pixel. This means that the blending has no effect. This mode is the inverse of .

QPainter.CompositionMode_SourceIn

The output is the source, where the alpha is reduced by that of the destination.

QPainter.CompositionMode_DestinationIn

The output is the destination, where the alpha is reduced by that of the source. This mode is the inverse of .

QPainter.CompositionMode_SourceOut

The output is the source, where the alpha is reduced by the inverse of destination.

QPainter.CompositionMode_DestinationOut

The output is the destination, where the alpha is reduced by the inverse of the source. This mode is the inverse of .

QPainter.CompositionMode_SourceAtop

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

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 .

QPainter.CompositionMode_Xor

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. is not the same as the bitwise Xor.

QPainter.CompositionMode_Plus

Both the alpha and color of the source and destination pixels are added together.

QPainter.CompositionMode_Multiply

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

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

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

The darker of the source and destination colors is selected.

QPainter.CompositionMode_Lighten

The lighter of the source and destination colors is selected.

QPainter.CompositionMode_ColorDodge

The destination color is brightened to reflect the source color. A black source color leaves the destination color unchanged.

QPainter.CompositionMode_ColorBurn

The destination color is darkened to reflect the source color. A white source color leaves the destination color unchanged.

QPainter.CompositionMode_HardLight

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

Darkens or lightens the colors depending on the source color. Similar to .

QPainter.CompositionMode_Difference

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

Similar to , but with a lower contrast. Painting with white inverts the destination color, whereas painting with black leaves the destination color unchanged.

QPainter.RasterOp_SourceOrDestination

Does a bitwise OR operation on the source and destination pixels (src OR dst).

QPainter.RasterOp_SourceAndDestination

Does a bitwise AND operation on the source and destination pixels (src AND dst).

QPainter.RasterOp_SourceXorDestination

Does a bitwise XOR operation on the source and destination pixels (src XOR dst).

QPainter.RasterOp_NotSourceAndNotDestination

Does a bitwise NOR operation on the source and destination pixels ((NOT src) AND (NOT dst)).

QPainter.RasterOp_NotSourceOrNotDestination

Does a bitwise NAND operation on the source and destination pixels ((NOT src) OR (NOT dst)).

QPainter.RasterOp_NotSourceXorDestination

Does a bitwise operation where the source pixels are inverted and then XOR’ed with the destination ((NOT src) XOR dst).

QPainter.RasterOp_NotSource

Does a bitwise operation where the source pixels are inverted (NOT src).

QPainter.RasterOp_NotSourceAndDestination

Does a bitwise operation where the source is inverted and then AND’ed with the destination ((NOT src) AND dst).

QPainter.RasterOp_SourceAndNotDestination

Does a bitwise operation where the source is AND’ed with the inverted destination pixels (src AND (NOT dst)).

QPainter.RasterOp_NotSourceOrDestination

Does a bitwise operation where the source is inverted and then OR’ed with the destination ((NOT src) OR dst).

QPainter.RasterOp_ClearDestination

The pixels in the destination are cleared (set to 0) independent of the source.

QPainter.RasterOp_SetDestination

The pixels in the destination are set (set to 1) independent of the source.

QPainter.RasterOp_NotDestination

Does a bitwise operation where the destination pixels are inverted (NOT dst).

QPainter.RasterOp_SourceOrNotDestination

Does a bitwise operation where the source is OR’ed with the inverted destination pixels (src OR (NOT dst)).

See also

compositionMode() setCompositionMode() Composition Modes Image Composition Example

PySide2.QtGui.QPainter.background()
Return type:

PySide2.QtGui.QBrush

Returns the current background brush.

See also

setBackground() Settings

PySide2.QtGui.QPainter.backgroundMode()
Return type:

BGMode

Returns the current background mode.

See also

setBackgroundMode() Settings

PySide2.QtGui.QPainter.begin(arg__1)
Parameters:

arg__1 – PySide2.QtGui.QPaintDevice

Return type:

bool

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 is called.

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

painter.begin(0)  # impossible - paint device cannot be 0

image = QPixmap(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 , 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 Format_Indexed8 is not supported.

See also

end() QPainter()

PySide2.QtGui.QPainter.beginNativePainting()

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:

  • blending is disabled

  • the depth, stencil and scissor tests are disabled

  • the active texture unit is reset to 0

  • the depth mask, depth function and the clear depth are reset to their default values

  • the stencil mask, stencil operation and stencil function are reset to their default values

  • the current color is reset to solid white

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:

painter = QPainter(self)
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()

See also

endNativePainting()

PySide2.QtGui.QPainter.boundingRect(rect, flags, text)
Parameters:
Return type:

PySide2.QtCore.QRect

PySide2.QtGui.QPainter.boundingRect(rect, text[, o=QTextOption()])
Parameters:
Return type:

PySide2.QtCore.QRectF

PySide2.QtGui.QPainter.boundingRect(rect, flags, text)
Parameters:
Return type:

PySide2.QtCore.QRectF

PySide2.QtGui.QPainter.boundingRect(x, y, w, h, flags, text)
Parameters:

  • x – int

  • y – int

  • w – int

  • h – int

  • flags – int

  • text – str

Return type:

PySide2.QtCore.QRect

This is an overloaded function.

Returns the bounding rectangle of the given text as it will appear when drawn inside the rectangle beginning at the point (x , y ) with width w and height h .

PySide2.QtGui.QPainter.brush()
Return type:

PySide2.QtGui.QBrush

Returns the painter’s current brush.

See also

setBrush() Settings

PySide2.QtGui.QPainter.brushOrigin()
Return type:

PySide2.QtCore.QPoint

Returns the currently set brush origin.

See also

setBrushOrigin() Settings

PySide2.QtGui.QPainter.clipBoundingRect()
Return type:

PySide2.QtCore.QRectF

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.

See also

setClipRect() setClipPath() setClipRegion()

PySide2.QtGui.QPainter.clipPath()
Return type:

PySide2.QtGui.QPainterPath

Returns the current clip path 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() setClipping()

PySide2.QtGui.QPainter.clipRegion()
Return type:

PySide2.QtGui.QRegion

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() setClipping()

PySide2.QtGui.QPainter.combinedMatrix()
Return type:

PySide2.QtGui.QMatrix

Note

This function is deprecated.

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

It is advisable to use combinedTransform() instead of this function to preserve the properties of perspective transformations.

See also

setWorldTransform() setWindow() setViewport()

PySide2.QtGui.QPainter.combinedTransform()
Return type:

PySide2.QtGui.QTransform

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

See also

setWorldTransform() setWindow() setViewport()

PySide2.QtGui.QPainter.compositionMode()
Return type:

CompositionMode

Returns the current composition mode.

See also

CompositionMode setCompositionMode()

PySide2.QtGui.QPainter.device()
Return type:

PySide2.QtGui.QPaintDevice

Returns the paint device on which this painter is currently painting, or None if the painter is not active.

See also

isActive()

PySide2.QtGui.QPainter.deviceMatrix()
Return type:

PySide2.QtGui.QMatrix

Note

This function is deprecated.

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

Note

It is advisable to use deviceTransform() instead of this function to preserve the properties of perspective transformations.

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

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

See also

worldMatrix() hasFeature()

PySide2.QtGui.QPainter.deviceTransform()
Return type:

PySide2.QtGui.QTransform

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 ( HANDLE ), and the platform does not do transformations nativly.

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

See also

worldTransform() hasFeature()

PySide2.QtGui.QPainter.drawArc(arg__1, a, alen)
Parameters:
PySide2.QtGui.QPainter.drawArc(rect, a, alen)
Parameters:
PySide2.QtGui.QPainter.drawArc(x, y, w, h, a, alen)
Parameters:

  • x – int

  • y – int

  • w – int

  • h – int

  • a – int

  • alen – int

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 .

PySide2.QtGui.QPainter.drawChord(arg__1, a, alen)
Parameters:
PySide2.QtGui.QPainter.drawChord(rect, a, alen)
Parameters:
PySide2.QtGui.QPainter.drawChord(x, y, w, h, a, alen)
Parameters:

  • x – int

  • y – int

  • w – int

  • h – int

  • a – int

  • alen – int

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 .

PySide2.QtGui.QPainter.drawConvexPolygon(arg__1)
Parameters:

arg__1 –

PySide2.QtGui.QPainter.drawConvexPolygon(polygon)
Parameters:

polygon – PySide2.QtGui.QPolygonF

PySide2.QtGui.QPainter.drawConvexPolygon(polygon)
Parameters:

polygon – PySide2.QtGui.QPolygon

PySide2.QtGui.QPainter.drawConvexPolygon(arg__1)
Parameters:

arg__1 –

PySide2.QtGui.QPainter.drawEllipse(center, rx, ry)
Parameters:
PySide2.QtGui.QPainter.drawEllipse(center, rx, ry)
Parameters:
PySide2.QtGui.QPainter.drawEllipse(r)
Parameters:

r – PySide2.QtCore.QRect

PySide2.QtGui.QPainter.drawEllipse(r)
Parameters:

r – PySide2.QtCore.QRectF

PySide2.QtGui.QPainter.drawEllipse(x, y, w, h)
Parameters:

  • x – int

  • y – int

  • w – int

  • h – int

This is an overloaded function.

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

PySide2.QtGui.QPainter.drawImage(targetRect, image, sourceRect[, flags=Qt.AutoColor])
Parameters:
PySide2.QtGui.QPainter.drawImage(x, y, image[, sx=0[, sy=0[, sw=-1[, sh=-1[, flags=Qt.AutoColor]]]]])
Parameters:

  • x – int

  • y – int

  • image – PySide2.QtGui.QImage

  • sx – int

  • sy – int

  • sw – int

  • sh – int

  • flags – ImageConversionFlags

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.

PySide2.QtGui.QPainter.drawImage(targetRect, image, sourceRect[, flags=Qt.AutoColor])
Parameters:
PySide2.QtGui.QPainter.drawImage(r, image)
Parameters:
PySide2.QtGui.QPainter.drawImage(r, image)
Parameters:
PySide2.QtGui.QPainter.drawImage(p, image, sr[, flags=Qt.AutoColor])
Parameters:
PySide2.QtGui.QPainter.drawImage(p, image)
Parameters:
PySide2.QtGui.QPainter.drawImage(p, image, sr[, flags=Qt.AutoColor])
Parameters:
PySide2.QtGui.QPainter.drawImage(p, image)
Parameters:
PySide2.QtGui.QPainter.drawLine(line)
Parameters:

line – PySide2.QtCore.QLine

PySide2.QtGui.QPainter.drawLine(line)
Parameters:

line – PySide2.QtCore.QLineF

PySide2.QtGui.QPainter.drawLine(p1, p2)
Parameters:
PySide2.QtGui.QPainter.drawLine(p1, p2)
Parameters:
PySide2.QtGui.QPainter.drawLine(x1, y1, x2, y2)
Parameters:

  • x1 – int

  • y1 – int

  • x2 – int

  • y2 – int

This is an overloaded function.

Draws a line from (x1 , y1 ) to (x2 , y2 ).

PySide2.QtGui.QPainter.drawLines(lines)
Parameters:

lines –

PySide2.QtGui.QPainter.drawLines(pointPairs)
Parameters:

pointPairs –

PySide2.QtGui.QPainter.drawLines(pointPairs)
Parameters:

pointPairs –

PySide2.QtGui.QPainter.drawLines(lines)
Parameters:

lines –

PySide2.QtGui.QPainter.drawPath(path)
Parameters:

path – PySide2.QtGui.QPainterPath

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

qpainter-path1

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

painter = QPainter(self)
painter.drawPath(path)

See also

the Painter Paths example the Vector Deformation example

PySide2.QtGui.QPainter.drawPicture(p, picture)
Parameters:
PySide2.QtGui.QPainter.drawPicture(p, picture)
Parameters:
PySide2.QtGui.QPainter.drawPicture(x, y, picture)
Parameters:

This is an overloaded function.

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

PySide2.QtGui.QPainter.drawPie(arg__1, a, alen)
Parameters:
PySide2.QtGui.QPainter.drawPie(x, y, w, h, a, alen)
Parameters:

  • x – int

  • y – int

  • w – int

  • h – int

  • a – int

  • alen – int

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 .

PySide2.QtGui.QPainter.drawPie(rect, a, alen)
Parameters:
PySide2.QtGui.QPainter.drawPixmap(p, pm, sr)
Parameters:
PySide2.QtGui.QPainter.drawPixmap(x, y, w, h, pm, sx, sy, sw, sh)
Parameters:

  • x – int

  • y – int

  • w – int

  • h – int

  • pm – PySide2.QtGui.QPixmap

  • sx – int

  • sy – int

  • sw – int

  • sh – int

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;

PySide2.QtGui.QPainter.drawPixmap(x, y, w, h, pm)
Parameters:

This is an overloaded function.

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

PySide2.QtGui.QPainter.drawPixmap(x, y, pm, sx, sy, sw, sh)
Parameters:

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.

PySide2.QtGui.QPainter.drawPixmap(x, y, pm)
Parameters:
PySide2.QtGui.QPainter.drawPixmap(targetRect, pixmap, sourceRect)
Parameters:
PySide2.QtGui.QPainter.drawPixmap(targetRect, pixmap, sourceRect)
Parameters:
PySide2.QtGui.QPainter.drawPixmap(r, pm)
Parameters:
PySide2.QtGui.QPainter.drawPixmap(p, pm)
Parameters:
PySide2.QtGui.QPainter.drawPixmap(p, pm, sr)
Parameters:
PySide2.QtGui.QPainter.drawPixmap(p, pm)
Parameters:
PySide2.QtGui.QPainter.drawPixmapFragments(fragments, fragmentCount, pixmap[, hints=QPainter.PixmapFragmentHints()])
Parameters:

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.

See also

PixmapFragment PixmapFragmentHint

PySide2.QtGui.QPainter.drawPoint(p)
Parameters:

p – PySide2.QtCore.QPoint

PySide2.QtGui.QPainter.drawPoint(pt)
Parameters:

pt – PySide2.QtCore.QPointF

PySide2.QtGui.QPainter.drawPoint(x, y)
Parameters:

  • x – int

  • y – int

This is an overloaded function.

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

PySide2.QtGui.QPainter.drawPoints(points)
Parameters:

points – PySide2.QtGui.QPolygonF

PySide2.QtGui.QPainter.drawPoints(points)
Parameters:

points – PySide2.QtGui.QPolygon

PySide2.QtGui.QPainter.drawPoints(arg__1)
Parameters:

arg__1 –

PySide2.QtGui.QPainter.drawPoints(arg__1)
Parameters:

arg__1 –

PySide2.QtGui.QPainter.drawPolygon(arg__1, arg__2)
Parameters:
PySide2.QtGui.QPainter.drawPolygon(arg__1, arg__2)
Parameters:
PySide2.QtGui.QPainter.drawPolygon(polygon[, fillRule=Qt.OddEvenFill])
Parameters:
PySide2.QtGui.QPainter.drawPolygon(polygon[, fillRule=Qt.OddEvenFill])
Parameters:
PySide2.QtGui.QPainter.drawPolyline(polyline)
Parameters:

polyline – PySide2.QtGui.QPolygonF

PySide2.QtGui.QPainter.drawPolyline(polygon)
Parameters:

polygon – PySide2.QtGui.QPolygon

PySide2.QtGui.QPainter.drawPolyline(arg__1)
Parameters:

arg__1 –

PySide2.QtGui.QPainter.drawPolyline(arg__1)
Parameters:

arg__1 –

PySide2.QtGui.QPainter.drawRect(rect)
Parameters:

rect – PySide2.QtCore.QRect

PySide2.QtGui.QPainter.drawRect(rect)
Parameters:

rect – PySide2.QtCore.QRectF

PySide2.QtGui.QPainter.drawRect(x1, y1, w, h)
Parameters:

  • x1 – int

  • y1 – int

  • w – int

  • h – int

This is an overloaded function.

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

PySide2.QtGui.QPainter.drawRects(rectangles)
Parameters:

rectangles –

PySide2.QtGui.QPainter.drawRects(rectangles)
Parameters:

rectangles –

PySide2.QtGui.QPainter.drawRoundRect(r[, xround=25[, yround=25]])
Parameters:

Note

This function is deprecated.

PySide2.QtGui.QPainter.drawRoundRect(r[, xround=25[, yround=25]])
Parameters:

Note

This function is deprecated.

PySide2.QtGui.QPainter.drawRoundRect(x, y, w, h[, xRound=25[, yRound=25]])
Parameters:

  • x – int

  • y – int

  • w – int

  • h – int

  • xRound – int

  • yRound – int

Note

This function is deprecated.

This is an overloaded function.

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

PySide2.QtGui.QPainter.drawRoundedRect(x, y, w, h, xRadius, yRadius[, mode=Qt.AbsoluteSize])
Parameters:

  • x – int

  • y – int

  • w – int

  • h – int

  • xRadius – float

  • yRadius – float

  • mode – SizeMode

This is an overloaded function.

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

PySide2.QtGui.QPainter.drawRoundedRect(rect, xRadius, yRadius[, mode=Qt.AbsoluteSize])
Parameters:
PySide2.QtGui.QPainter.drawRoundedRect(rect, xRadius, yRadius[, mode=Qt.AbsoluteSize])
Parameters:
PySide2.QtGui.QPainter.drawStaticText(topLeftPosition, staticText)
Parameters:
PySide2.QtGui.QPainter.drawStaticText(left, top, staticText)
Parameters:

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.

PySide2.QtGui.QPainter.drawStaticText(topLeftPosition, staticText)
Parameters:
PySide2.QtGui.QPainter.drawText(p, s)
Parameters:
PySide2.QtGui.QPainter.drawText(p, s)
Parameters:
PySide2.QtGui.QPainter.drawText(r, flags, text)
Parameters:
PySide2.QtGui.QPainter.drawText(r, text[, o=QTextOption()])
Parameters:
PySide2.QtGui.QPainter.drawText(r, flags, text)
Parameters:
PySide2.QtGui.QPainter.drawText(x, y, s)
Parameters:

  • x – int

  • y – int

  • s – str

PySide2.QtGui.QPainter.drawText(x, y, w, h, flags, text)
Parameters:

  • x – int

  • y – int

  • w – int

  • h – int

  • flags – int

  • text – str

This is an overloaded function.

Draws the given text within the rectangle with origin (x , y ), width and height .

The boundingRect (if not null) is set to the what the bounding rectangle should be in order to enclose the whole text. For example, in the following image, the dotted line represents boundingRect as calculated by the function, and the dashed line represents the rectangle defined by x , y , width and height :

qpainter-text-bounds1

 
QPainter painter(this);
QFont font = painter.font();
font.setPixelSize(48);
painter.setFont(font);

const QRect rectangle = QRect(0, 0, 100, 50);
QRect boundingRect;
painter.drawText(rectangle, 0, tr("Hello"), &boundingRect);

QPen pen = painter.pen();
pen.setStyle(Qt::DotLine);
painter.setPen(pen);
painter.drawRect(boundingRect.adjusted(0, 0, -pen.width(), -pen.width()));

pen.setStyle(Qt::DashLine);
painter.setPen(pen);
painter.drawRect(rectangle.adjusted(0, 0, -pen.width(), -pen.width()));

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

  • AlignLeft

  • AlignRight

  • AlignHCenter

  • AlignJustify

  • AlignTop

  • AlignBottom

  • AlignVCenter

  • AlignCenter

  • TextSingleLine

  • TextExpandTabs

  • TextShowMnemonic

  • TextWordWrap

By default, QPainter draws text anti-aliased.

Note

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

See also

AlignmentFlag TextFlag setFont() setPen()

PySide2.QtGui.QPainter.drawTextItem(p, ti)
Parameters:
PySide2.QtGui.QPainter.drawTextItem(p, ti)
Parameters:
PySide2.QtGui.QPainter.drawTextItem(x, y, ti)
Parameters:
PySide2.QtGui.QPainter.drawTiledPixmap(x, y, w, h, arg__5[, sx=0[, sy=0]])
Parameters:

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).

PySide2.QtGui.QPainter.drawTiledPixmap(rect, pm[, offset=QPointF()])
Parameters:
PySide2.QtGui.QPainter.drawTiledPixmap(arg__1, arg__2[, pos=QPoint()])
Parameters:
PySide2.QtGui.QPainter.end()
Return type:

bool

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() isActive()

PySide2.QtGui.QPainter.endNativePainting()

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.

See also

beginNativePainting()

PySide2.QtGui.QPainter.eraseRect(arg__1)
Parameters:

arg__1 – PySide2.QtCore.QRect

PySide2.QtGui.QPainter.eraseRect(arg__1)
Parameters:

arg__1 – PySide2.QtCore.QRectF

PySide2.QtGui.QPainter.eraseRect(x, y, w, h)
Parameters:

  • x – int

  • y – int

  • w – int

  • h – int

This is an overloaded function.

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

PySide2.QtGui.QPainter.fillPath(path, brush)
Parameters:

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()

PySide2.QtGui.QPainter.fillRect(arg__1, arg__2)
Parameters:
PySide2.QtGui.QPainter.fillRect(x, y, w, h, color)
Parameters:
PySide2.QtGui.QPainter.fillRect(x, y, w, h, arg__5)
Parameters:
PySide2.QtGui.QPainter.fillRect(x, y, w, h, c)
Parameters:

  • x – int

  • y – int

  • w – int

  • h – int

  • c – GlobalColor

This is an overloaded function.

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

PySide2.QtGui.QPainter.fillRect(x, y, w, h, style)
Parameters:

  • x – int

  • y – int

  • w – int

  • h – int

  • style – BrushStyle

This is an overloaded function.

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

PySide2.QtGui.QPainter.fillRect(x, y, w, h, preset)
Parameters:

  • x – int

  • y – int

  • w – int

  • h – int

  • preset – Preset

This is an overloaded function.

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

PySide2.QtGui.QPainter.fillRect(r, c)
Parameters:
PySide2.QtGui.QPainter.fillRect(r, style)
Parameters:
PySide2.QtGui.QPainter.fillRect(arg__1, color)
Parameters:
PySide2.QtGui.QPainter.fillRect(r, c)
Parameters:
PySide2.QtGui.QPainter.fillRect(r, style)
Parameters:
PySide2.QtGui.QPainter.fillRect(r, preset)
Parameters:
PySide2.QtGui.QPainter.fillRect(arg__1, color)
Parameters:
PySide2.QtGui.QPainter.fillRect(arg__1, arg__2)
Parameters:
PySide2.QtGui.QPainter.fillRect(r, preset)
Parameters:
PySide2.QtGui.QPainter.font()
Return type:

PySide2.QtGui.QFont

Returns the currently set font used for drawing text.

See also

setFont() drawText() Settings

PySide2.QtGui.QPainter.fontInfo()
Return type:

PySide2.QtGui.QFontInfo

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

See also

font() isActive() Settings

PySide2.QtGui.QPainter.fontMetrics()
Return type:

PySide2.QtGui.QFontMetrics

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

See also

font() isActive() Settings

PySide2.QtGui.QPainter.hasClipping()
Return type:

bool

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

See also

setClipping() Clipping

PySide2.QtGui.QPainter.initFrom(device)
Parameters:

device – PySide2.QtGui.QPaintDevice

Note

This function is deprecated.

Initializes the painters pen, background and font to the same as the given device .

See also

begin() Settings

PySide2.QtGui.QPainter.isActive()
Return type:

bool

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

See also

begin() paintingActive()

PySide2.QtGui.QPainter.layoutDirection()
Return type:

LayoutDirection

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

See also

textDirection() setLayoutDirection() drawText() Settings

PySide2.QtGui.QPainter.matrix()
Return type:

PySide2.QtGui.QMatrix

Note

This function is deprecated.

Use worldTransform() instead.

See also

setMatrix() worldTransform()

PySide2.QtGui.QPainter.matrixEnabled()
Return type:

bool

Note

This function is deprecated.

Use worldMatrixEnabled() instead

See also

setMatrixEnabled() worldMatrixEnabled()

PySide2.QtGui.QPainter.opacity()
Return type:

float

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

See also

setOpacity()

PySide2.QtGui.QPainter.paintEngine()
Return type:

PySide2.QtGui.QPaintEngine

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

See also

isActive()

PySide2.QtGui.QPainter.pen()
Return type:

PySide2.QtGui.QPen

Returns the painter’s current pen.

See also

setPen() Settings

static PySide2.QtGui.QPainter.redirected(device[, offset=None])
Parameters:
Return type:

PySide2.QtGui.QPaintDevice

Note

This function is deprecated.

Using render() obsoletes the use of this function.

Returns the replacement for given device . The optional out parameter offset returns the offset within the replaced device.

Warning

Making use of redirections in the QPainter API implies that begin() and QPaintDevice destructors need to hold a mutex for a short period. This can impact performance. Use of render is strongly encouraged.

See also

setRedirected() restoreRedirected()

PySide2.QtGui.QPainter.renderHints()
Return type:

RenderHints

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

See also

setRenderHints() testRenderHint() Rendering Quality

PySide2.QtGui.QPainter.resetMatrix()

Note

This function is deprecated.

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

It is advisable to use resetTransform() instead of this function to preserve the properties of perspective transformations.

See also

Coordinate Transformations

PySide2.QtGui.QPainter.resetTransform()

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

See also

Coordinate Transformations

PySide2.QtGui.QPainter.restore()

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

See also

save()

static PySide2.QtGui.QPainter.restoreRedirected(device)
Parameters:

device – PySide2.QtGui.QPaintDevice

Note

This function is deprecated.

Using render() obsoletes the use of this function.

Restores the previous redirection for the given device after a call to setRedirected() .

Warning

Making use of redirections in the QPainter API implies that begin() and QPaintDevice destructors need to hold a mutex for a short period. This can impact performance. Use of render is strongly encouraged.

See also

redirected()

PySide2.QtGui.QPainter.rotate(a)
Parameters:

a – float

Rotates the coordinate system clockwise. The given angle parameter is in degrees.

See also

setWorldTransform() Coordinate Transformations

PySide2.QtGui.QPainter.save()

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

See also

restore()

PySide2.QtGui.QPainter.scale(sx, sy)
Parameters:

  • sx – float

  • sy – float

Scales the coordinate system by (sx , sy ).

See also

setWorldTransform() Coordinate Transformations

PySide2.QtGui.QPainter.setBackground(bg)
Parameters:

bg – PySide2.QtGui.QBrush

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() Settings

PySide2.QtGui.QPainter.setBackgroundMode(mode)
Parameters:

mode – BGMode

Sets the background mode of the painter to the given mode

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

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

See also

backgroundMode() setBackground() Settings

PySide2.QtGui.QPainter.setBrush(style)
Parameters:

style – BrushStyle

This is an overloaded function.

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

PySide2.QtGui.QPainter.setBrush(brush)
Parameters:

brush – PySide2.QtGui.QBrush

PySide2.QtGui.QPainter.setBrushOrigin(arg__1)
Parameters:

arg__1 – PySide2.QtCore.QPoint

PySide2.QtGui.QPainter.setBrushOrigin(arg__1)
Parameters:

arg__1 – PySide2.QtCore.QPointF

PySide2.QtGui.QPainter.setBrushOrigin(x, y)
Parameters:

  • x – int

  • y – int

This is an overloaded function.

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

PySide2.QtGui.QPainter.setClipPath(path[, op=Qt.ReplaceClip])
Parameters:

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() Clipping

PySide2.QtGui.QPainter.setClipRect(arg__1[, op=Qt.ReplaceClip])
Parameters:
PySide2.QtGui.QPainter.setClipRect(x, y, w, h[, op=Qt.ReplaceClip])
Parameters:

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

PySide2.QtGui.QPainter.setClipRect(arg__1[, op=Qt.ReplaceClip])
Parameters:
PySide2.QtGui.QPainter.setClipRegion(arg__1[, op=Qt.ReplaceClip])
Parameters:

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() Clipping

PySide2.QtGui.QPainter.setClipping(enable)
Parameters:

enable – bool

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

See also

hasClipping() Clipping

PySide2.QtGui.QPainter.setCompositionMode(mode)
Parameters:

mode – CompositionMode

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()

PySide2.QtGui.QPainter.setFont(f)
Parameters:

f – PySide2.QtGui.QFont

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 and fontInfo() returns the font actually being used (which may be the same).

See also

font() drawText() Settings

PySide2.QtGui.QPainter.setLayoutDirection(direction)
Parameters:

direction – LayoutDirection

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

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

See also

setTextDirection() layoutDirection() drawText() Settings

PySide2.QtGui.QPainter.setMatrix(matrix[, combine=false])
Parameters:

Note

This function is deprecated.

Use setWorldTransform() instead.

See also

matrix() setWorldTransform()

PySide2.QtGui.QPainter.setMatrixEnabled(enabled)
Parameters:

enabled – bool

Note

This function is deprecated.

Use setWorldMatrixEnabled() instead.

See also

matrixEnabled() setWorldMatrixEnabled()

PySide2.QtGui.QPainter.setOpacity(opacity)
Parameters:

opacity – float

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.

See also

opacity()

PySide2.QtGui.QPainter.setPen(pen)
Parameters:

pen – PySide2.QtGui.QPen

PySide2.QtGui.QPainter.setPen(color)
Parameters:

color – PySide2.QtGui.QColor

PySide2.QtGui.QPainter.setPen(style)
Parameters:

style – PenStyle

This is an overloaded function.

Sets the painter’s pen to have the given style , width 1 and black color.

static PySide2.QtGui.QPainter.setRedirected(device, replacement[, offset=QPoint()])
Parameters:

Note

This function is deprecated.

Please use render() instead.

Redirects all paint commands for the given paint device , to the replacement device. The optional point offset defines an offset within the source device.

The redirection will not be effective until the begin() function has been called; make sure to call end() for the given device ‘s painter (if any) before redirecting. Call restoreRedirected() to restore the previous redirection.

Warning

Making use of redirections in the QPainter API implies that begin() and QPaintDevice destructors need to hold a mutex for a short period. This can impact performance. Use of render is strongly encouraged.

See also

redirected() restoreRedirected()

PySide2.QtGui.QPainter.setRenderHint(hint[, on=true])
Parameters:

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

See also

setRenderHints() renderHints() Rendering Quality

PySide2.QtGui.QPainter.setRenderHints(hints[, on=true])
Parameters:

  • hints – RenderHints

  • on – bool

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

See also

setRenderHint() renderHints() Rendering Quality

PySide2.QtGui.QPainter.setTransform(transform[, combine=false])
Parameters:

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

See also

transform() setWorldTransform()

PySide2.QtGui.QPainter.setViewTransformEnabled(enable)
Parameters:

enable – bool

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

See also

viewTransformEnabled() Window-Viewport Conversion

PySide2.QtGui.QPainter.setViewport(viewport)
Parameters:

viewport – PySide2.QtCore.QRect

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() Window-Viewport Conversion

PySide2.QtGui.QPainter.setViewport(x, y, w, h)
Parameters:

  • x – int

  • y – int

  • w – int

  • h – int

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 .

PySide2.QtGui.QPainter.setWindow(window)
Parameters:

window – PySide2.QtCore.QRect

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() Window-Viewport Conversion

PySide2.QtGui.QPainter.setWindow(x, y, w, h)
Parameters:

  • x – int

  • y – int

  • w – int

  • h – int

This is an overloaded function.

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

PySide2.QtGui.QPainter.setWorldMatrix(matrix[, combine=false])
Parameters:

Note

This function is deprecated.

Sets the transformation matrix to matrix and enables transformations.

Note

It is advisable to use setWorldTransform() instead of this function to preserve the properties of perspective transformations.

If combine is true, then matrix is combined with the current transformation matrix; otherwise matrix replaces the current transformation matrix.

If matrix is the identity matrix and combine is false, this function calls setWorldMatrixEnabled (false). (The identity matrix is the matrix where m11() and m22() are 1.0 and the rest are 0.0.)

The following functions can transform the coordinate system without using a QMatrix :

They operate on the painter’s worldMatrix() and are implemented like this:

def rotate(self, angle):
    matrix = QMatrix()
    matrix.rotate(angle)
    setWorldMatrix(matrix, true)

Note that when using function you should always have combine be true when you are drawing into a QPicture . Otherwise it may not be possible to replay the picture with additional transformations; using the translate() , scale() , etc. convenience functions is safe.

For more information about the coordinate system, transformations and window-viewport conversion, see Coordinate System .

See also

worldMatrix() setWorldTransform() QTransform

PySide2.QtGui.QPainter.setWorldMatrixEnabled(enabled)
Parameters:

enabled – bool

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

See also

worldMatrixEnabled() worldTransform() Coordinate Transformations

PySide2.QtGui.QPainter.setWorldTransform(matrix[, combine=false])
Parameters:

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() setTransform()

PySide2.QtGui.QPainter.shear(sh, sv)
Parameters:

  • sh – float

  • sv – float

Shears the coordinate system by (sh , sv ).

See also

setWorldTransform() Coordinate Transformations

PySide2.QtGui.QPainter.strokePath(path, pen)
Parameters:

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

See also

fillPath() Drawing

PySide2.QtGui.QPainter.testRenderHint(hint)
Parameters:

hint – RenderHint

Return type:

bool

Returns true if hint is set; otherwise returns false .

See also

renderHints() setRenderHint()

PySide2.QtGui.QPainter.transform()
Return type:

PySide2.QtGui.QTransform

Alias for worldTransform() . Returns the world transformation matrix.

See also

setTransform() worldTransform()

PySide2.QtGui.QPainter.translate(offset)
Parameters:

offset – PySide2.QtCore.QPoint

PySide2.QtGui.QPainter.translate(offset)
Parameters:

offset – PySide2.QtCore.QPointF

PySide2.QtGui.QPainter.translate(dx, dy)
Parameters:

  • dx – float

  • dy – float

This is an overloaded function.

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

PySide2.QtGui.QPainter.viewTransformEnabled()
Return type:

bool

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

See also

setViewTransformEnabled() worldTransform()

PySide2.QtGui.QPainter.viewport()
Return type:

PySide2.QtCore.QRect

Returns the viewport rectangle.

See also

setViewport() setViewTransformEnabled()

PySide2.QtGui.QPainter.window()
Return type:

PySide2.QtCore.QRect

Returns the window rectangle.

See also

setWindow() setViewTransformEnabled()

PySide2.QtGui.QPainter.worldMatrix()
Return type:

PySide2.QtGui.QMatrix

Note

This function is deprecated.

Returns the world transformation matrix.

It is advisable to use worldTransform() because does not preserve the properties of perspective transformations.

See also

setWorldMatrix() Coordinate Transformations Coordinate System

PySide2.QtGui.QPainter.worldMatrixEnabled()
Return type:

bool

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

See also

setWorldMatrixEnabled() worldTransform() Coordinate System

PySide2.QtGui.QPainter.worldTransform()
Return type:

PySide2.QtGui.QTransform

Returns the world transformation matrix.

See also

setWorldTransform()