Massimo Redaelli wrote: > Hi! > > Thanks for the quick answer :) > > On Fri, Jul 24, 2009 at 6:01 AM, Jonathon Jongsma<[email protected]> > wrote: >> You should not cache the Cairo context between expose events. That will not >> work as you expect it to. You should simply create a new context in each >> expose handler > > Ok. > >>> bool eWriteWin::onExposeEvent ( GdkEventExpose *event) >>> { >>> std::cerr << "Expose!" << std::endl; >>> // cr = pda->get_window()->create_cairo_context(); >> As this commented-out-code does here ^ >> >>> I tried to create a new context, but I have no idea if that's the >>> right thing to do (afterall, the ols context works if I draw *after* >>> the ExposeEvent), and even if it is, how do I get create a c++ Context >>> (or how do I get the c++ Gtk::Window from event->window)? >> first of all: I assume that the expose event that you're handling is the >> drawing area's expose event and not some parent widget's expose event (?). >> If so, then the commented-out code above should work fine. > > Yes, it is the drawing area event. But that line doesn't change > anything: still nothing appears. > Do I maybe have to get (how?) the window handler through the > GdkEventExpose parameter of the handler?
no, from what I can tell, your code should work properly. If you can provide a *minimal* compilable example that still exhibits the problem, I might be able to provide more insight. Also, please reply on-list so others with input can chime in if they want to -- jonner _______________________________________________ gtkmm-list mailing list [email protected] http://mail.gnome.org/mailman/listinfo/gtkmm-list
