func _msgBox(parent *Window, primarytext string, secondarytext string, msgtype C.GtkMessageType, buttons C.GtkButtonsType) (result C.gint) {
ret := make(chan C.gint)
defer close(ret)
uitask <- func() {
var pwin *C.GtkWindow = nil
// to implement parent, we need to put the GtkMessageDialog into a new window group along with parent
// a GtkWindow can only be part of one group
// so we use this to save the parent window group (if there is one) and store the new window group
// after showing the message box, we restore the previous window group, so future parent == nil can work properly
// thanks to pbor and mclasen in irc.gimp.net/#gtk+
var prevgroup *C.GtkWindowGroup = nil
var newgroup *C.GtkWindowGroup
if parent != nil {
pwin = togtkwindow(parent.sysData.widget)
// we can't remove a window from the "default window group"; otherwise this throws up Gtk-CRITICAL warnings
if C.gtk_window_has_group(pwin) != C.FALSE {
prevgroup = C.gtk_window_get_group(pwin)
C.gtk_window_group_remove_window(prevgroup, pwin)
}
newgroup = C.gtk_window_group_new()
C.gtk_window_group_add_window(newgroup, pwin)
}
cprimarytext := C.CString(primarytext)
defer C.free(unsafe.Pointer(cprimarytext))
csecondarytext := (*C.char)(nil)
if secondarytext != "" {
csecondarytext = C.CString(secondarytext)
defer C.free(unsafe.Pointer(csecondarytext))
}
box := C.gtkNewMsgBox(pwin, msgtype, buttons, cprimarytext, csecondarytext)
response := C.gtk_dialog_run((*C.GtkDialog)(unsafe.Pointer(box)))
C.gtk_widget_destroy(box)
if parent != nil {
C.gtk_window_group_remove_window(newgroup, pwin)
C.g_object_unref(C.gpointer(unsafe.Pointer(newgroup))) // free the group
if prevgroup != nil {
C.gtk_window_group_add_window(prevgroup, pwin)
} // otherwise it'll go back into the default group on its own
}
ret <- response
}
return <-ret
}
func (d *dialog) run(mk func() *C.GtkWidget) {
d.prepare()
box := mk()
if d.parent == dialogWindow {
go func() {
res := make(chan C.gint)
defer close(res)
uitask <- func() {
r := C.gtk_dialog_run((*C.GtkDialog)(unsafe.Pointer(box)))
d.cleanup(box)
res <- r
}
d.send(<-res)
}()
return
}
// otherwise just connect the delete signal
g_signal_connect_pointer(box, "response", dialog_response_callback, unsafe.Pointer(d))
C.gtk_widget_show_all(box)
}