Re: Dragging a window

[Adam Chyła <adam chyla tk>]

Don't do that:

> >
> > get_window()->set_cursor(cursor);
> >

What about error checking?

Glib::RefPtr<Gdk::Window> window = get_window();
  if (window)
    window->set_cursor(...);


Dnia 2011-12-11, o godz. 04:50:25
lecas malecas <darkiiiiii gmail com> napisał(a):

> It does work... was running the code in the wrong place, sorry :)
> 
> 
> On Sun, Dec 11, 2011 at 4:31 AM, lecas malecas <darkiiiiii gmail com>
> wrote:
> > Yep, that works. thanks!
> >
> > Just another doubt, to change the cursor of the mouse (the image).
> >
> >
> > I think its something like this:
> >
> > const Glib::RefPtr< Gdk::Cursor > cursor =
> > Gdk::Cursor::create(Gdk::HAND1);
> >
> > get_window()->set_cursor(cursor);
> >
> > but I'm getting a seg. fault in the last line :(
> >
> >
> > On Sun, Dec 11, 2011 at 3:30 AM, Adam Chyła <adam chyla tk> wrote:
> >>  Hi,
> >> Take a look at that code
> >>
> >> // http://paste.org/42104
> >> // GTKmm 2.4
> >>
> >> #include <gtkmm.h>
> >>
> >> using namespace Gtk;
> >>
> >> class window : public Window
> >> {
> >> public:
> >>
> >>    window()
> >>    {
> >>        set_title("Example");
> >>        show_all_children();
> >>
> >>        add_events(Gdk::BUTTON_PRESS_MASK);
> >>        add_events(Gdk::POINTER_MOTION_MASK);
> >>    }
> >>
> >> private:
> >>    int mouse_beg_x, mouse_beg_y;
> >>    int win_pos_beg_x, win_pos_beg_y;
> >>
> >>    bool on_button_press_event(GdkEventButton* event)
> >>    {
> >>        mouse_beg_x = event->x_root;
> >>        mouse_beg_y = event->y_root;
> >>
> >>        get_position(win_pos_beg_x, win_pos_beg_y);
> >>
> >>        return true;
> >>    }
> >>
> >>    bool on_motion_notify_event(GdkEventMotion* event)
> >>    {
> >>        if (event->state & GDK_BUTTON1_MASK)
> >>        {
> >>            int x = win_pos_beg_x + (event->x_root - mouse_beg_x);
> >>            int y = win_pos_beg_y + (event->y_root - mouse_beg_y);
> >>
> >>            move(x, y);
> >>        }
> >>        return true;
> >>    }
> >> };
> >>
> >> int main(int argc, char **argv)
> >> {
> >>    Gtk::Main kit(argc, argv);
> >>
> >>    window win;
> >>    Gtk::Main::run(win);
> >>
> >>    return 0;
> >> }
> >>
> >>
> >> Good luck
> >> Adam