It can draw everything from simple lines to complex shapes like pies and chords. QPainter class is is used for drawing different shapes in PyQt5. It can also draw aligned text and pixmaps. The follow code reproduces shows the different results. Priority: P2: Important . The current clip is available using the functions clipRegion()and clipPath(). in this method first we have created the QPainter class object and we have set the QBrush and QPen for our QPainter class and for drawing of QPolygon we need some QPoints and at the end we draw our polygon.

QPainter performs low-level painting on widgets and other paint devices. The painting is done within the paintEvent method. After that the user clicks any four points on the screen. For compatibility reasons, it might be required to simplify the representation of a painter path: QPainterPath provides the toFillPolygon(), toFillPolygons() and toSubpathPolygons() functions which convert the painter path into a polygon. Details. An output polygon feature will be created for each input feature; the resulting polygons may overlap. Labels: None. drawLine ... QPoint (130, 140) << QPoint (180, 170) << QPoint (180, 140) << QPoint (220, 110) << QPoint (140, 100); painter.

Converts the path into a polygon using the QTransform matrix, and returns the polygon. The thing is that on calling func_draw_polygon() multiple times with different polygon, I see that the previous draw is still there (unless using fill in func_draw_polygon() - which works fine).

When the fourth point is clicked, all the 4 points will be connected to form a polygon. The paintEvent method. But this seems a bit strange, why should color of pen be Qt::color0? The painting code is placed between the begin and end methods of the QPainter object. QPainterPath and QPolygon. QPainter. I would like to draw a simple shape on the screen, and I have selected PyQt as the package to use, as it seems to be the most established.

Normally, it draws in a “natural” coordinate system, but it can also do view and world transformation. QPainter performs low-level painting on widgets and other paint devices. And QPainter can do this across a variety of different hardware and software stacks. Normally, it draws in a "natural" coordinate system, but it can … Naturally the underlying combination of hardware … Log In. QPainter provides highly optimized functions to do most of the drawing GUI programs require. C++ (Cpp) QPainter - 30 examples found. It seems to be over complicated to just draw a simple shape like for example a polygon on the screen. First the user needs to enable this function by clicking a button.

These are the top rated real world C++ (Cpp) examples of QPainter extracted from open source projects. Another workaround is to convert the paths to polygons first and then draw the polygons instead.

Resolution: Done Affects Version/s: 4.3.4. First the user needs to enable this function by clicking a button. XML Word Printable. – Kenly Nov 17 '15 at 13:17