Hi Buddy,
Il giorno Sun, 17 Jan 2010 11:14:29 -0700 (MST) [email protected] ha scritto: > I just updated my windows machine to the latest Qt and PyQt versions > and I've been having a problem with my custom subclasses of > QGraphicsItems. When I reimplement the paint method it gets passed > several option as a QStyleOptionGraphicsItem object. The exposedRect > member of that is suppose to contain the area the needs to be > repainted, however I always get a null rectangle. Attached is a starting from Qt 4.6 exposedRect should contain the bounding box of the item unless you set the QGraphicsItem::ItemUsesExtendedStyleOptions: see http://qt.gitorious.org/qt/qt/blobs/d16ba0a93d611689bce9a2732a1cc8c9a317f5bf/dist/changes-4.6.0#line1075 and http://www.riverbankcomputing.com/pipermail/pyqt/2010-January/025521.html > simple example I put together to illustrate the problem. The example > attached is suppose to draw a 3x3 rectangle under the mouse cursor > when the mouse button is pressed down, but since the exposedRect is > always null it does nothing. It also prints out the rectangle and I > always get lines of all zeroes. I think this may be a bug, but > please tell me if I'm just doing something wrong or if something is > messed up with my PyQt install. In your specific case I think you forgot to implement the boundingRect method in yout custom QGraphicsItem. Best regards -- Antonio Valentino _______________________________________________ PyQt mailing list [email protected] http://www.riverbankcomputing.com/mailman/listinfo/pyqt
