Some Gtk functions take string parameters that can be null, such as the one below.
GtkWidget * gtk_frame_new (const gchar *label);
Creates a new GtkFrame, with optional label label . If label is NULL, the label is omitted.
In the above case we are unable to omit/disable the label widget, as we are unable to pass NULL to the C function.
Gobbi's implementation currently does'nt take into account the nullable string parameters.
func FrameNew(label string) *Frame {
c_label := C.CString(label)
defer C.free(unsafe.Pointer(c_label))
retC := C.gtk_frame_new(c_label)
retGo := FrameNewFromC(unsafe.Pointer(retC))
return retGo
}
The Gotk3 library handles this correctly.
func FrameNew(label string) (*Frame, error) {
var cstr *C.char
if label != "" {
cstr = C.CString(label)
defer C.free(unsafe.Pointer(cstr))
}
c := C.gtk_frame_new((*C.gchar)(cstr))
if c == nil {
return nil, nilPtrErr
}
obj := glib.Take(unsafe.Pointer(c))
return wrapFrame(obj), nil
}
The Gir files do indicate nullable parameters (nullable="1"). So code generation should be possible.
<parameter name="label"
transfer-ownership="none"
nullable="1"
allow-none="1">
<doc xml:space="preserve">the text to use as the label of the frame</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
Would appreciate if you could get this working and a possible workaround if possible until then :)
Some Gtk functions take string parameters that can be null, such as the one below.
In the above case we are unable to omit/disable the label widget, as we are unable to pass NULL to the C function.
Gobbi's implementation currently does'nt take into account the nullable string parameters.
The Gotk3 library handles this correctly.
The Gir files do indicate nullable parameters (
nullable="1"). So code generation should be possible.Would appreciate if you could get this working and a possible workaround if possible until then :)