// ClosureNew creates a new GClosure and adds its callback function
// to the internally-maintained map. It's exported for visibility to other
// gotk3 packages and shouldn't be used in application code.
func ClosureNew(f interface{}, marshalData ...interface{}) (*C.GClosure, error) {
// Create a reflect.Value from f. This is called when the
// returned GClosure runs.
rf := reflect.ValueOf(f)
// Create closure context which points to the reflected func.
cc := closureContext{rf: rf}
// Closures can only be created from funcs.
if rf.Type().Kind() != reflect.Func {
return nil, errors.New("value is not a func")
}
if len(marshalData) > 0 {
rv := reflect.ValueOf(marshalData[0])
cc.userData = &rv
}
c := C._g_closure_new()
// Associate the GClosure with rf. rf will be looked up in this
// map by the closure when the closure runs.
closures.Lock()
closures.m[c] = cc
closures.Unlock()
return c, nil
}
// ClosureNew creates a new GClosure and adds its callback function
// to the internally-maintained map. It's exported for visibility to other
// gotk3 packages and shouldn't be used in application code.
func ClosureNew(f interface{}, marshalData ...interface{}) (*C.GClosure, error) {
// Create a reflect.Value from f. This is called when the
// returned GClosure runs.
rf := reflect.ValueOf(f)
// Closures can only be created from funcs.
if rf.Type().Kind() != reflect.Func {
return nil, errors.New("value is not a func")
}
var c *C.GClosure
if len(marshalData) == 0 {
c = C._g_closure_new()
} else {
p, err := reflectGValue(marshalData[0])
if err != nil {
return nil, err
}
// TODO: data needs to stay in scope until the source func is gone.
c = C._g_closure_new_with_data((C.gpointer)(p))
}
// Associate the GClosure with rf. rf will be looked up in this
// map by the closure when the closure runs.
closures.Lock()
closures.m[c] = rf
closures.Unlock()
return c, nil
}