[SOLVED] emit crashes on QGraphicsView

mohsen

i've added a signal in a QGraphicsView deriven class. when i call "emit" i get crashes.
can't resolve it :(

EDITED: (code added)

@class editor: public QGraphicsView
{
Q_OBJECT

public:
editor(QWidget *parent);

signals:
void rectSizeChanged(int w, int h);
};@

sierdzio

That should work. Perhaps moc info has not been updated? Please clean your project, run qmake and rebuild it.

mohsen

tried that hundred times, not works :(

it should be added that i get that crash in cpp code

@
emit rectSizeChanged(100, 100); //POWW
@

sierdzio

Weird. Perhaps you are running a threaded application? Maybe the signal is sent to some thread with a DirectCall instead of a Qt::QueuedConnection?

SGaist

Hi,

To add to sierdzio, are you sure it's not on the receiver's end that the crash happens (thinking of a direct connection) ?

mohsen

@SGalst: yeah ;)

@slerdzlo: you were right. actually that "emit" was called within a function which was controlled from another friend class of "QGraphicsItem". i didn't care about the thready work of QGraphicsView and the scenes inside it.

so i moved signals into the graphics item class and added a getter function to the graphics view which returns a pointer to that graphics item. now, main widget will get signals directly from the graphics item.

thank you very much.