/**
* \brief Check that the userdata at the specified index is a drawable
* object (surface, text surface of sprite) and returns it.
* \param l a Lua context
* \param index an index in the stack
* \return The drawable.
*/
DrawablePtr LuaContext::check_drawable(lua_State* l, int index) {
if (is_drawable(l, index)) {
const ExportableToLuaPtr& userdata = *(static_cast<ExportableToLuaPtr*>(
lua_touserdata(l, index)
));
return std::static_pointer_cast<Drawable>(userdata);
}
else {
LuaTools::type_error(l, index, "drawable");
throw;
}
}
bool GrBx::Area::on_motion_notify_event (GdkEventMotion *_motion)
{
bool ret = GrBx::Widget::on_motion_notify_event (_motion);
if (_motion && window && is_drawable ())
{
double width = get_width (), height = get_height ();
const Glib::RefPtr<Gdk::GC> black_gc = get_style ()->get_black_gc ();
if (pixbuf) window->draw_pixbuf (pixbuf, 0, 0, 0, 0, width, height, Gdk::RGB_DITHER_NONE, 0, 0);
window->draw_line (black_gc, _motion->x, 0, _motion->x, height);
window->draw_line (black_gc, 0, _motion->y, width, _motion->y);
}
return ret;
}
/**
* \brief Check that the userdata at the specified index is a drawable
* object (surface, text surface of sprite) and returns it.
* \param l a Lua context
* \param index an index in the stack
* \return the surface
*/
Drawable& LuaContext::check_drawable(lua_State* l, int index) {
Drawable** drawable = NULL;
if (is_drawable(l, index)) {
drawable = static_cast<Drawable**>(lua_touserdata(l, index));
}
else {
luaL_typerror(l, index, "drawable");
}
return **drawable;
}
void GrBx::Area::draw_graphs ()
{
if (window && is_drawable ())
{
window->draw_rectangle (get_style ()->get_fg_gc (Gtk::STATE_NORMAL), true, 0, 0, get_width (), get_height ());
Cairo::RefPtr<Cairo::Context> cr = window->create_cairo_context ();
Cairo::Matrix matrix (1, 0, 0, -1, - hadjustment.get_value (), get_height () + vadjustment.get_value ());
cr->transform (matrix);
for (Graphs::iterator gitr = graphs.begin (); gitr != graphs.end (); ++gitr)
if ((*gitr)->get_visible ()) (*gitr)->draw (cr, sx, sy);
update_pixbuf ();
}
}