WebBy passing a point to centerOn () , QGraphicsView will scroll its viewport to ensure that the point is centered in the view. An overload is provided for scrolling to a QGraphicsItem , in … WebContribute to sebastianp265/edge-detection-image-viewer development by creating an account on GitHub.

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Webvoid QGraphicsView:: centerOn (const QPointF &pos) Scrolls the contents of the viewport to ensure that the scene coordinate pos, is centered in the view. Because pos is a … WebJul 20, 2012 · 6. I have a custom class derived from QGraphicsView that implements a slot call scrollHorizontal (int dx), inside the code is simply. void CustomView::scrollHorizontal (int dx) { scrollContentsBy (dx, 0); } My problem is, scrolling like this works but doesn't update the scene properly, instead any pixels found on the edge of the view are ... bird of prey drawings

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WebSep 16, 2013 · Then implement the mouseMoveEvent of the object in this class. class MyBezierCurve : public QGraphicsItem { protected: void mousePressEvent (QGraphicsSceneMouseEvent*); void mouseMoveEvent (QGraphicsSceneMouseEvent*); void mouseReleaseEvent (QGraphicsSceneMouseEvent*); }; This way, the object can … WebOct 28, 2014 · To get the scene's centre position, you can use QGraphicsScene::width () and QGraphicsScene::height (): -. // Assuming pScene is a pointer to the QGraphicsScene line->setPos (pScene->width ()/2, pScene->height ()/2); The QGraphicsView is just a window looking into a scene, so it can be smaller than the scene In this case, the item … WebApr 16, 2014 · 3. I can't figure out how to make centerOn () to move viewport around the item (or the item around the port, not sure which way it is). The following code does work … damming a stream