Add WidgetExt::add_tick_callback binding

src/widget.rs

@@ -2,19 +2,23 @@
 // See the COPYRIGHT file at the top-level directory of this distribution.
 // Licensed under the MIT license, see the LICENSE file or <http://opensource.org/licenses/MIT>
 
+use std::cell::RefCell;
 use std::mem::transmute;
 use std::ptr;
 
 use glib::object::{Downcast, IsA};
 use glib::signal::{SignalHandlerId, connect};
 use glib::translate::*;
-use glib_ffi::gboolean;
+use glib_ffi::{gboolean, gpointer};
 use gdk::{DragAction, Event, ModifierType};
+#[cfg(any(feature = "v3_8", feature = "dox"))]
+use gdk::FrameClock;
 use gdk_ffi;
 use pango;
 use ffi;
 
 use {
+    Continue,
     DestDefaults,
     Inhibit,
     Object,
@@ -32,6 +36,11 @@ pub trait WidgetExtManual {
 
     fn override_font(&self, font: &pango::FontDescription);
 
+    #[cfg(any(feature = "v3_8", feature = "dox"))]
+    fn add_tick_callback<F>(&self, func: F) -> u32
+    where
+        F: FnMut(&Self, &FrameClock) -> Continue + 'static;
+
     fn connect_map_event<F: Fn(&Self, &Event) -> Inhibit + 'static>(&self, f: F) -> SignalHandlerId;
 
     fn connect_unmap_event<F: Fn(&Self, &Event) -> Inhibit + 'static>(&self, f: F) -> SignalHandlerId;
@@ -98,6 +107,23 @@ impl<O: IsA<Widget> + IsA<Object>> WidgetExtManual for O {
         }
     }
 
+    #[cfg(any(feature = "v3_8", feature = "dox"))]
+    fn add_tick_callback<F>(&self, func: F) -> u32
+    where
+        F: FnMut(&Self, &FrameClock) -> Continue + 'static,
+    {
+        unsafe {
+            let func: Box<RefCell<Box<FnMut(&Self, &FrameClock) -> Continue + 'static>>> =
+                Box::new(RefCell::new(Box::new(func)));
+            ffi::gtk_widget_add_tick_callback(
+                self.to_glib_none().0,
+                Some(trampoline_add_tick_callback),
+                Box::into_raw(func) as gpointer,
+                Some(destroy_closure),
+            )
+        }
+    }
+
    fn connect_map_event<F: Fn(&Self, &Event) -> Inhibit + 'static>(&self, f: F) -> SignalHandlerId {
         unsafe {
             let f: Box<Box<Fn(&Self, &Event) -> Inhibit + 'static>> = Box::new(Box::new(f));
@@ -115,6 +141,24 @@ impl<O: IsA<Widget> + IsA<Object>> WidgetExtManual for O {
     }
 }
 
+#[cfg(any(feature = "v3_8", feature = "dox"))]
+unsafe extern "C" fn trampoline_add_tick_callback(
+    widget: *mut ffi::GtkWidget,
+    frame_clock: *mut gdk_ffi::GdkFrameClock,
+    func: gpointer,
+) -> gboolean {
+    callback_guard!();
+    let func: &RefCell<Box<FnMut(&Widget, &FrameClock) -> Continue + 'static>> = transmute(func);
+
+    (&mut *func.borrow_mut())(&from_glib_borrow(widget), &from_glib_borrow(frame_clock)).to_glib()
+}
+
+#[cfg(any(feature = "v3_8", feature = "dox"))]
+unsafe extern "C" fn destroy_closure(ptr: gpointer) {
+    callback_guard!();
+    Box::<RefCell<Box<FnMut(&Widget, &FrameClock) -> Continue + 'static>>>::from_raw(ptr as *mut _);
+}
+
 unsafe extern "C" fn event_any_trampoline<T>(this: *mut ffi::GtkWidget,
                                              event: *mut gdk_ffi::GdkEventAny,
                                              f: &&(Fn(&T, &Event) -> Inhibit + 'static)) -> gboolean