Hi Alexander, Il giorno Thu, 29 Oct 2009 16:53:04 +0100 Alexander Borghgraef <alexander.borghgraef....@gmail.com> ha scritto:
> Hi all, > > > I've been writing an app which displays sequences of images, and > allows for the selection of regions of interest in them. > Display/playback works like a charm, basically I use a > QGraphicsScene/View setup with a QGraphicsPixmapItem in the scene, > which is then updated upon receiving the timeout signal of a timer. > Pretty basic stuff. > > Now for selection: one approach would be to subclass either the > QGraphicsView or the QGraphicsPixmapItem, overload the mouse > events, get the selection coordinates from that for further use and > put a QGraphicsRectItem on the scene on top of the selection. Yes, one solution is subclassing, another could be using eventFilter(s). > Now, I noticed that QGraphicsView already has rubberband selection > implemented: when I set the View's DragMode to > QGraphicsView.RubberBandDrag, I get a nice rubberband rectangle when > I drag the mouse across the View. My problem here is > that I can't seem to figure out how to access the selection > coordinates of that rectangle. Is there some way of accessing this > data? There doesn't seem to be any getDragSelection( ) or some such > function, but then how does this work? Do I need to get it from the > underlying QGraphicsScene object? Help would be appreciated. I have the same problem. At the moment I have a solution based on event filters but I'm very interested in a solution exploiting built-in features so please keep updated. Best regards -- Antonio Valentino _______________________________________________ PyQt mailing list PyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
