WebAug 24, 2015 · To obtain the correct result using transformations: QGraphicsItem * item = ....; QGraphicsRotation rot; QGraphicsScale scale; auto center = item->boundingRect ().center (); rot.setOrigin (QVector3D (center)); scale.setOrigin (QVector3D (center ())); item->setTransformations (QList () << &rot << &scale); Finally, the … WebFeb 8, 2024 · I have checked that the boundingRect has the correct size, by replacing the paint code with (basically) painter->drawRect(boundingRect()); The size is exactly as expected, before and after scaling the x-axis. ... Also, all my pens are hairline (1 px cosmetic), and GraphicsView normally takes that one pixel around the boundingRect …
qtuiotouch/graphicsview.cpp at master · dancasimiro/qtuiotouch
Web首先需要继承QGraphicsItem,必须重写 boundingRect() 和paint()函数,如果图形为非矩形的话,还需要再重写一下shape()函数boundingRect()返回要绘制图形项的矩形区域,所有绘画都必须限制在项目的边界内paint()用来绘制图形项shape()用来更精准的描述图形的区域,以便更好地进行碰撞检测。 WebNov 13, 2011 · sceneRect = graphicsView.mapToScene (graphicsView.rect ()).boundingRect () In case there is a shear or rotation transformation present it gives you the bounding rectangle of the visible scene area. If you do not have such transformations (only shift or zoom) the returned rectangle is the exact scene area. lithocarpus chromosome
python - PySide6 How to move QGraphicsWidget? - Stack Overflow
WebJan 29, 2015 · 1 Answer. Reimplement mousePressEvent on the scene, rather than the view. That way, the event argument will be a QGraphicsSceneMouseEvent, which has several useful additional functions - including scenePos, which does exactly what you want: class graphicsScene (QtGui.QGraphicsScene): def __init__ (self, parent=None): super … WebC++ (Cpp) QGraphicsTextItem::boundingRect - 30 examples found. These are the top rated real world C++ (Cpp) examples of QGraphicsTextItem::boundingRect extracted … WebOct 20, 2014 · The problem is that my custom arrows (they inherit QGraphicsPathItem) disappear from the scene whenever it's boundingRect () center is scrolled off the view. Everytime the scene expands, both it's sceneRect () and the view's sceneRect () are updated as well. I've: set ui->graphicsView->setViewportUpdateMode … lithocarpus corneus