Update manual code

examples/css/main.rs

@@ -37,11 +37,11 @@ fn build_ui(application: &gtk::Application) {
     let label = gtk::Button::with_label("hover me!");
     // We need to name it in order to be able to use its name as a CSS label to
     // apply CSS on it.
-    gtk::WidgetExt::set_widget_name(&label, "label1");
+    label.set_widget_name("label1");
 
     let entry = gtk::Entry::new();
     // We need to name it in order to apply CSS on it.
-    gtk::WidgetExt::set_widget_name(&entry, "entry1");
+    entry.set_widget_name("entry1");
     entry.set_text("Some text");
 
     let combo = gtk::ComboBoxText::new();

examples/gio_task/file_size/ffi.rs

@@ -1,9 +1,6 @@
 use gtk::glib::subclass::prelude::*;
 use gtk::glib::translate::*;
-use gtk::prelude::AsyncResultExt;
-use gtk::prelude::Cast;
-use gtk::prelude::FileExt;
-use gtk::prelude::ToValue;
+use gtk::prelude::*;
 use gtk::{gio, glib};
 
 pub type FileSize = <super::imp::FileSize as ObjectSubclass>::Instance;

examples/gio_task/file_size/mod.rs

@@ -2,10 +2,7 @@ pub mod ffi;
 mod imp;
 
 use gtk::glib::subclass::prelude::*;
-use gtk::prelude::AsyncResultExt;
-use gtk::prelude::Cast;
-use gtk::prelude::FileExt;
-use gtk::prelude::ToValue;
+use gtk::prelude::*;
 use gtk::{gio, glib};
 
 glib::wrapper! {

examples/overlay/main.rs

@@ -21,7 +21,7 @@ fn build_ui(application: &gtk::Application) {
     // The overlay label.
     let overlay_text = gtk::Label::new(Some("0"));
     // We need to name it in order to apply CSS on it.
-    gtk::WidgetExt::set_widget_name(&overlay_text, "overlay-label");
+    overlay_text.set_widget_name("overlay-label");
     // We put the overlay in the top-right corner of the window.
     overlay_text.set_halign(gtk::Align::End);
     overlay_text.set_valign(gtk::Align::Start);

gio/src/cancellable.rs

@@ -1,6 +1,6 @@
 // Take a look at the license at the top of the repository in the LICENSE file.
 
-use crate::CancellableExt;
+use crate::prelude::*;
 
 #[test]
 fn check_callback() {

gio/src/file_enumerator.rs

@@ -1,7 +1,7 @@
 // Take a look at the license at the top of the repository in the LICENSE file.
 
+use crate::prelude::*;
 use crate::FileEnumerator;
-use crate::FileEnumeratorExt;
 use crate::FileInfo;
 use std::iter::Iterator;
 

gio/src/gio_future.rs

@@ -5,8 +5,8 @@ use futures_core::task::{Context, Poll};
 use std::future::Future;
 use std::pin::{self, Pin};
 
+use crate::prelude::*;
 use crate::Cancellable;
-use crate::CancellableExt;
 
 pub struct GioFuture<F, O, T, E> {
     obj: O,

gio/src/inet_address.rs

@@ -1,7 +1,7 @@
 // Take a look at the license at the top of the repository in the LICENSE file.
 
+use crate::prelude::*;
 use crate::InetAddress;
-use crate::InetAddressExt;
 use crate::SocketFamily;
 use glib::object::IsA;
 use glib::translate::*;

gio/src/inet_socket_address.rs

@@ -1,8 +1,8 @@
 // Take a look at the license at the top of the repository in the LICENSE file.
 
+use crate::prelude::*;
 use crate::InetAddress;
 use crate::InetSocketAddress;
-use crate::InetSocketAddressExt;
 
 use std::net::SocketAddr;
 

gio/src/input_stream.rs

@@ -1,10 +1,10 @@
 // Take a look at the license at the top of the repository in the LICENSE file.
 
 use crate::error::to_std_io_result;
+use crate::prelude::*;
 use crate::Cancellable;
 use crate::InputStream;
 use crate::Seekable;
-use crate::SeekableExt;
 use futures_core::task::{Context, Poll};
 use futures_io::{AsyncBufRead, AsyncRead};
 use glib::object::IsA;

gio/src/io_stream.rs

@@ -1,9 +1,7 @@
 // Take a look at the license at the top of the repository in the LICENSE file.
 
-use crate::pollable_input_stream::PollableInputStreamExtManual;
-use crate::pollable_output_stream::PollableOutputStreamExtManual;
+use crate::prelude::*;
 use crate::IOStream;
-use crate::IOStreamExt;
 use crate::InputStreamAsyncRead;
 use crate::OutputStreamAsyncWrite;
 use crate::PollableInputStream;

gio/src/output_stream.rs

@@ -5,7 +5,6 @@ use crate::prelude::*;
 use crate::Cancellable;
 use crate::OutputStream;
 use crate::Seekable;
-use crate::SeekableExt;
 use glib::object::IsA;
 use glib::translate::*;
 use glib::Priority;

gio/src/pollable_input_stream.rs

@@ -1,8 +1,8 @@
 // Take a look at the license at the top of the repository in the LICENSE file.
 
+use crate::prelude::*;
 use crate::Cancellable;
 use crate::PollableInputStream;
-use crate::PollableInputStreamExt;
 use futures_core::task::{Context, Poll};
 use futures_io::AsyncRead;
 use glib::object::{Cast, IsA};

gio/src/pollable_output_stream.rs

@@ -1,10 +1,9 @@
 // Take a look at the license at the top of the repository in the LICENSE file.
 
 use crate::error::to_std_io_result;
+use crate::prelude::*;
 use crate::Cancellable;
-use crate::OutputStreamExt;
 use crate::PollableOutputStream;
-use crate::PollableOutputStreamExt;
 use futures_channel::oneshot;
 use futures_core::task::{Context, Poll};
 use futures_core::Future;

gio/src/settings.rs

@@ -1,7 +1,7 @@
 // Take a look at the license at the top of the repository in the LICENSE file.
 
-use crate::{Settings, SettingsBindFlags, SettingsExt};
-use glib::prelude::*;
+use crate::prelude::*;
+use crate::{Settings, SettingsBindFlags};
 use glib::translate::{from_glib_borrow, from_glib_none, ToGlib, ToGlibPtr};
 use glib::variant::FromVariant;
 use glib::{BoolError, IsA, ToVariant};

gio/src/task.rs

@@ -90,10 +90,8 @@ impl Task {
 #[cfg(test)]
 mod test {
     use super::*;
+    use crate::prelude::*;
     use crate::test_util::run_async_local;
-    use crate::CancellableExt;
-    use glib::Cast;
-    use glib::ToValue;
 
     #[test]
     fn test_int_async_result() {

gio/src/tls_connection.rs

@@ -1,8 +1,8 @@
 // Take a look at the license at the top of the repository in the LICENSE file.
 
 #[cfg(any(feature = "v2_66", feature = "dox"))]
-use crate::auto::TlsChannelBindingType;
-use crate::auto::TlsConnection;
+use crate::TlsChannelBindingType;
+use crate::TlsConnection;
 #[cfg(any(feature = "v2_66", feature = "dox"))]
 use glib::translate::*;
 use glib::IsA;

gio/src/unix_socket_address.rs

@@ -1,10 +1,9 @@
 // Take a look at the license at the top of the repository in the LICENSE file.
 
+use crate::prelude::*;
 use crate::SocketAddress;
 use crate::UnixSocketAddress;
-use crate::UnixSocketAddressExt;
 use crate::UnixSocketAddressType;
-use glib::object::{Cast, IsA};
 use glib::translate::*;
 #[cfg(not(feature = "dox"))]
 use std::ffi::OsStr;

gtk/src/application.rs

@@ -2,11 +2,10 @@
 
 use crate::rt;
 use crate::Application;
-use gio::ApplicationExt;
+use gio::prelude::*;
 use gio::ApplicationFlags;
 use glib::signal::SignalHandlerId;
 use glib::translate::*;
-use glib::ObjectExt;
 
 use std::cell::RefCell;
 use std::rc::Rc;

gtk/src/builder.rs

@@ -1,11 +1,10 @@
 // Take a look at the license at the top of the repository in the LICENSE file.
 
 use crate::Builder;
-use glib::object::{Cast, IsA};
+use glib::prelude::*;
 use glib::translate::*;
 use glib::GString;
 use glib::Object;
-use glib::ObjectExt;
 use std::path::Path;
 
 impl Builder {

gtk/src/dialog.rs

@@ -1,16 +1,12 @@
 // Take a look at the license at the top of the repository in the LICENSE file.
 
-use crate::auto::DialogExt;
+use crate::prelude::*;
 use crate::Dialog;
 use crate::DialogFlags;
 use crate::ResponseType;
 use crate::Widget;
-use crate::WidgetExt;
 use crate::Window;
-use glib::object::Cast;
 use glib::translate::*;
-use glib::IsA;
-use glib::ObjectExt;
 use std::cell::Cell;
 use std::future::Future;
 use std::pin::Pin;

gtk/src/style_context.rs

@@ -2,8 +2,7 @@
 
 use crate::StateFlags;
 use crate::StyleContext;
-use crate::StyleContextExt;
-use glib::object::IsA;
+use glib::prelude::*;
 use pango::FontDescription;
 
 pub trait StyleContextExtManual: 'static {
@@ -12,7 +11,7 @@ pub trait StyleContextExtManual: 'static {
 
 impl<O: IsA<StyleContext>> StyleContextExtManual for O {
     fn font(&self, state: StateFlags) -> FontDescription {
-        self.property("font", state)
+        <Self as crate::prelude::StyleContextExt>::property(self, "font", state)
             .get()
             .expect("font property is not pango::FontDescription")
     }

gtk/src/subclass/widget.rs

@@ -7,8 +7,9 @@ use glib::translate::*;
 
 use glib::prelude::*;
 use glib::subclass::prelude::*;
-use glib::{Cast, Object};
+use glib::Object;
 
+use crate::prelude::*;
 use crate::Allocation;
 use crate::DragResult;
 use crate::Inhibit;
@@ -17,7 +18,6 @@ use crate::SelectionData;
 use crate::SizeRequestMode;
 use crate::TextDirection;
 use crate::Widget;
-use crate::WidgetExt;
 
 pub trait WidgetImpl: WidgetImplExt + ObjectImpl {
     fn adjust_baseline_allocation(&self, widget: &Self::Type, baseline: &mut i32) {

gtk/src/widget.rs

@@ -2,19 +2,18 @@
 
 use gdk::{DragAction, Event, ModifierType};
 use glib::ffi::gboolean;
-use glib::object::{Cast, IsA, WeakRef};
 use glib::signal::{connect_raw, Inhibit, SignalHandlerId};
 use glib::translate::*;
 use glib::Continue;
-use glib::ObjectExt;
 use std::mem::transmute;
 use std::ptr;
 
-use crate::{DestDefaults, Rectangle, TargetEntry, Widget, WidgetExt};
+use crate::prelude::*;
+use crate::{DestDefaults, Rectangle, TargetEntry, Widget};
 
 pub struct TickCallbackId {
     id: u32,
-    widget: WeakRef<Widget>,
+    widget: glib::WeakRef<Widget>,
 }
 
 impl TickCallbackId {