gstreamer-rs/gstreamer-editing-services/src/timeline_element.rs
2018-11-04 11:35:54 -03:00

67 lines
2.1 KiB
Rust

// Copyright (C) 2018 Thibault Saunier <tsaunier@igalia.com>
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use ffi;
use glib;
use glib::object::IsA;
use glib::translate::*;
use std::ptr;
use TimelineElement;
pub trait TimelineElementExtManual {
fn get_child_property(&self, name: &str) -> Option<glib::Value>;
fn set_child_property(&self, name: &str, value: &glib::ToValue) -> Result<(), glib::BoolError>;
}
impl<O: IsA<TimelineElement>> TimelineElementExtManual for O {
fn get_child_property(&self, name: &str) -> Option<glib::Value> {
unsafe {
let found: bool = from_glib(ffi::ges_timeline_element_lookup_child(
self.to_glib_none().0,
name.to_glib_none().0,
ptr::null_mut(),
ptr::null_mut(),
));
if !found {
return None;
}
let mut value = glib::Value::uninitialized();
ffi::ges_timeline_element_get_child_property(
self.to_glib_none().0,
name.to_glib_none().0,
value.to_glib_none_mut().0,
);
Some(value)
}
}
fn set_child_property(&self, name: &str, value: &glib::ToValue) -> Result<(), glib::BoolError> {
unsafe {
let found: bool = from_glib(ffi::ges_timeline_element_lookup_child(
self.to_glib_none().0,
name.to_glib_none().0,
ptr::null_mut(),
ptr::null_mut(),
));
if !found {
return Err(glib::BoolError("Child property not found"));
}
let value = value.to_value();
ffi::ges_timeline_element_set_child_property(
self.to_glib_none().0,
name.to_glib_none().0,
value.to_glib_none().0,
);
Ok(())
}
}
}