gdk4/auto/

surface.rs

// This file was generated by gir (https://github.com/gtk-rs/gir)
// from gir-files (https://github.com/gtk-rs/gir-files)
// DO NOT EDIT
#![allow(deprecated)]

use crate::{
    ffi, CairoContext, Cursor, Device, Display, Event, FrameClock, GLContext, ModifierType,
    Monitor, VulkanContext,
};
use glib::{
    object::ObjectType as _,
    prelude::*,
    signal::{connect_raw, SignalHandlerId},
    translate::*,
};
use std::boxed::Box as Box_;

glib::wrapper! {
    /// Represents a rectangular region on the screen.
    ///
    /// It’s a low-level object, used to implement high-level objects
    /// such as [GtkWindow](../gtk4/class.Window.html).
    ///
    /// The surfaces you see in practice are either [`Toplevel`][crate::Toplevel] or
    /// [`Popup`][crate::Popup], and those interfaces provide much of the required
    /// API to interact with these surfaces. Other, more specialized surface
    /// types exist, but you will rarely interact with them directly.
    ///
    /// This is an Abstract Base Class, you cannot instantiate it.
    ///
    /// ## Properties
    ///
    ///
    /// #### `cursor`
    ///  The mouse pointer for the [`Surface`][crate::Surface].
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `display`
    ///  The [`Display`][crate::Display] connection of the surface.
    ///
    /// Readable | Writeable | Construct Only
    ///
    ///
    /// #### `frame-clock`
    ///  The [`FrameClock`][crate::FrameClock] of the surface.
    ///
    /// Readable | Writeable | Construct Only
    ///
    ///
    /// #### `height`
    ///  The height of the surface, in pixels.
    ///
    /// Readable
    ///
    ///
    /// #### `mapped`
    ///  Whether the surface is mapped.
    ///
    /// Readable
    ///
    ///
    /// #### `scale`
    ///  The scale of the surface.
    ///
    /// Readable
    ///
    ///
    /// #### `scale-factor`
    ///  The scale factor of the surface.
    ///
    /// The scale factor is the next larger integer,
    /// compared to [`scale`][struct@crate::Surface#scale].
    ///
    /// Readable
    ///
    ///
    /// #### `width`
    ///  The width of the surface in pixels.
    ///
    /// Readable
    ///
    /// ## Signals
    ///
    ///
    /// #### `enter-monitor`
    ///  Emitted when @surface starts being present on the monitor.
    ///
    ///
    ///
    ///
    /// #### `event`
    ///  Emitted when GDK receives an input event for @surface.
    ///
    ///
    ///
    ///
    /// #### `layout`
    ///  Emitted when the size of @surface is changed, or when relayout should
    /// be performed.
    ///
    /// Surface size is reported in ”application pixels”, not
    /// ”device pixels” (see gdk_surface_get_scale_factor()).
    ///
    ///
    ///
    ///
    /// #### `leave-monitor`
    ///  Emitted when @surface stops being present on the monitor.
    ///
    ///
    ///
    ///
    /// #### `render`
    ///  Emitted when part of the surface needs to be redrawn.
    ///
    ///
    ///
    /// # Implements
    ///
    /// [`SurfaceExt`][trait@crate::prelude::SurfaceExt], [`SurfaceExtManual`][trait@crate::prelude::SurfaceExtManual]
    #[doc(alias = "GdkSurface")]
    pub struct Surface(Object<ffi::GdkSurface, ffi::GdkSurfaceClass>);

    match fn {
        type_ => || ffi::gdk_surface_get_type(),
    }
}

impl Surface {
    pub const NONE: Option<&'static Surface> = None;

    /// Create a new popup surface.
    ///
    /// The surface will be attached to @parent and can be positioned
    /// relative to it using [`PopupExt::present()`][crate::prelude::PopupExt::present()].
    /// ## `parent`
    /// the parent surface to attach the surface to
    /// ## `autohide`
    /// whether to hide the surface on outside clicks
    ///
    /// # Returns
    ///
    /// a new [`Surface`][crate::Surface]
    #[doc(alias = "gdk_surface_new_popup")]
    pub fn new_popup(parent: &impl IsA<Surface>, autohide: bool) -> Surface {
        skip_assert_initialized!();
        unsafe {
            from_glib_full(ffi::gdk_surface_new_popup(
                parent.as_ref().to_glib_none().0,
                autohide.into_glib(),
            ))
        }
    }

    /// Creates a new toplevel surface.
    /// ## `display`
    /// the display to create the surface on
    ///
    /// # Returns
    ///
    /// the new [`Surface`][crate::Surface]
    #[doc(alias = "gdk_surface_new_toplevel")]
    pub fn new_toplevel(display: &impl IsA<Display>) -> Surface {
        skip_assert_initialized!();
        unsafe {
            from_glib_full(ffi::gdk_surface_new_toplevel(
                display.as_ref().to_glib_none().0,
            ))
        }
    }
}

/// Trait containing all [`struct@Surface`] methods.
///
/// # Implementors
///
/// [`DragSurface`][struct@crate::DragSurface], [`Popup`][struct@crate::Popup], [`Surface`][struct@crate::Surface], [`Toplevel`][struct@crate::Toplevel]
pub trait SurfaceExt: IsA<Surface> + 'static {
    /// Emits a short beep associated to @self.
    ///
    /// If the display of @self does not support per-surface beeps,
    /// emits a short beep on the display just as [`DisplayExt::beep()`][crate::prelude::DisplayExt::beep()].
    #[doc(alias = "gdk_surface_beep")]
    fn beep(&self) {
        unsafe {
            ffi::gdk_surface_beep(self.as_ref().to_glib_none().0);
        }
    }

    /// Creates a new [`CairoContext`][crate::CairoContext] for rendering on @self.
    ///
    /// # Deprecated since 4.18
    ///
    /// Drawing content with Cairo should be done via
    ///   Cairo rendernodes, not by using the Cairo renderer.
    ///
    /// # Returns
    ///
    /// the newly created [`CairoContext`][crate::CairoContext]
    #[cfg_attr(feature = "v4_18", deprecated = "Since 4.18")]
    #[allow(deprecated)]
    #[doc(alias = "gdk_surface_create_cairo_context")]
    fn create_cairo_context(&self) -> CairoContext {
        unsafe {
            from_glib_full(ffi::gdk_surface_create_cairo_context(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Creates a new [`GLContext`][crate::GLContext] for the [`Surface`][crate::Surface].
    ///
    /// The context is disconnected from any particular surface or surface.
    /// If the creation of the [`GLContext`][crate::GLContext] failed, @error will be set.
    /// Before using the returned [`GLContext`][crate::GLContext], you will need to
    /// call [`GLContextExt::make_current()`][crate::prelude::GLContextExt::make_current()] or [`GLContextExt::realize()`][crate::prelude::GLContextExt::realize()].
    ///
    /// # Returns
    ///
    /// the newly created [`GLContext`][crate::GLContext]
    #[doc(alias = "gdk_surface_create_gl_context")]
    fn create_gl_context(&self) -> Result<GLContext, glib::Error> {
        unsafe {
            let mut error = std::ptr::null_mut();
            let ret =
                ffi::gdk_surface_create_gl_context(self.as_ref().to_glib_none().0, &mut error);
            if error.is_null() {
                Ok(from_glib_full(ret))
            } else {
                Err(from_glib_full(error))
            }
        }
    }

    /// Sets an error and returns [`None`].
    ///
    /// # Deprecated since 4.14
    ///
    /// GTK does not expose any Vulkan internals. This
    ///   function is a leftover that was accidentally exposed.
    ///
    /// # Returns
    ///
    /// [`None`]
    #[cfg_attr(feature = "v4_14", deprecated = "Since 4.14")]
    #[allow(deprecated)]
    #[doc(alias = "gdk_surface_create_vulkan_context")]
    fn create_vulkan_context(&self) -> Result<VulkanContext, glib::Error> {
        unsafe {
            let mut error = std::ptr::null_mut();
            let ret =
                ffi::gdk_surface_create_vulkan_context(self.as_ref().to_glib_none().0, &mut error);
            if error.is_null() {
                Ok(from_glib_full(ret))
            } else {
                Err(from_glib_full(error))
            }
        }
    }

    #[doc(alias = "gdk_surface_destroy")]
    fn destroy(&self) {
        unsafe {
            ffi::gdk_surface_destroy(self.as_ref().to_glib_none().0);
        }
    }

    /// Retrieves a [`Cursor`][crate::Cursor] pointer for the cursor currently set on the
    /// [`Surface`][crate::Surface].
    ///
    /// If the return value is [`None`] then there is no custom cursor set on
    /// the surface, and it is using the cursor for its parent surface.
    ///
    /// Use [`set_cursor()`][Self::set_cursor()] to unset the cursor of the surface.
    ///
    /// # Returns
    ///
    /// a [`Cursor`][crate::Cursor]
    #[doc(alias = "gdk_surface_get_cursor")]
    #[doc(alias = "get_cursor")]
    fn cursor(&self) -> Option<Cursor> {
        unsafe { from_glib_none(ffi::gdk_surface_get_cursor(self.as_ref().to_glib_none().0)) }
    }

    /// Retrieves a [`Cursor`][crate::Cursor] pointer for the @device currently set on the
    /// specified [`Surface`][crate::Surface].
    ///
    /// If the return value is [`None`] then there is no custom cursor set on the
    /// specified surface, and it is using the cursor for its parent surface.
    ///
    /// Use [`set_cursor()`][Self::set_cursor()] to unset the cursor of the surface.
    /// ## `device`
    /// a pointer [`Device`][crate::Device]
    ///
    /// # Returns
    ///
    /// a [`Cursor`][crate::Cursor]
    #[doc(alias = "gdk_surface_get_device_cursor")]
    #[doc(alias = "get_device_cursor")]
    fn device_cursor(&self, device: &impl IsA<Device>) -> Option<Cursor> {
        unsafe {
            from_glib_none(ffi::gdk_surface_get_device_cursor(
                self.as_ref().to_glib_none().0,
                device.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Obtains the current device position and modifier state.
    ///
    /// The position is given in coordinates relative to the upper
    /// left corner of @self.
    /// ## `device`
    /// pointer [`Device`][crate::Device] to query to
    ///
    /// # Returns
    ///
    /// [`true`] if the device is over the surface
    ///
    /// ## `x`
    /// return location for the X coordinate of @device
    ///
    /// ## `y`
    /// return location for the Y coordinate of @device
    ///
    /// ## `mask`
    /// return location for the modifier mask
    #[doc(alias = "gdk_surface_get_device_position")]
    #[doc(alias = "get_device_position")]
    fn device_position(&self, device: &impl IsA<Device>) -> Option<(f64, f64, ModifierType)> {
        unsafe {
            let mut x = std::mem::MaybeUninit::uninit();
            let mut y = std::mem::MaybeUninit::uninit();
            let mut mask = std::mem::MaybeUninit::uninit();
            let ret = from_glib(ffi::gdk_surface_get_device_position(
                self.as_ref().to_glib_none().0,
                device.as_ref().to_glib_none().0,
                x.as_mut_ptr(),
                y.as_mut_ptr(),
                mask.as_mut_ptr(),
            ));
            if ret {
                Some((
                    x.assume_init(),
                    y.assume_init(),
                    from_glib(mask.assume_init()),
                ))
            } else {
                None
            }
        }
    }

    /// Gets the [`Display`][crate::Display] associated with a [`Surface`][crate::Surface].
    ///
    /// # Returns
    ///
    /// the [`Display`][crate::Display] associated with @self
    #[doc(alias = "gdk_surface_get_display")]
    #[doc(alias = "get_display")]
    fn display(&self) -> Display {
        unsafe { from_glib_none(ffi::gdk_surface_get_display(self.as_ref().to_glib_none().0)) }
    }

    /// Gets the frame clock for the surface.
    ///
    /// The frame clock for a surface never changes unless the surface is
    /// reparented to a new toplevel surface.
    ///
    /// # Returns
    ///
    /// the frame clock
    #[doc(alias = "gdk_surface_get_frame_clock")]
    #[doc(alias = "get_frame_clock")]
    #[doc(alias = "frame-clock")]
    fn frame_clock(&self) -> FrameClock {
        unsafe {
            from_glib_none(ffi::gdk_surface_get_frame_clock(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Returns the height of the given @self.
    ///
    /// Surface size is reported in ”application pixels”, not
    /// ”device pixels” (see [`scale_factor()`][Self::scale_factor()]).
    ///
    /// # Returns
    ///
    /// The height of @self
    #[doc(alias = "gdk_surface_get_height")]
    #[doc(alias = "get_height")]
    fn height(&self) -> i32 {
        unsafe { ffi::gdk_surface_get_height(self.as_ref().to_glib_none().0) }
    }

    /// Checks whether the surface has been mapped.
    ///
    /// A surface is mapped with [`ToplevelExt::present()`][crate::prelude::ToplevelExt::present()]
    /// or [`PopupExt::present()`][crate::prelude::PopupExt::present()].
    ///
    /// # Returns
    ///
    /// [`true`] if the surface is mapped
    #[doc(alias = "gdk_surface_get_mapped")]
    #[doc(alias = "get_mapped")]
    #[doc(alias = "mapped")]
    fn is_mapped(&self) -> bool {
        unsafe { from_glib(ffi::gdk_surface_get_mapped(self.as_ref().to_glib_none().0)) }
    }

    /// Returns the internal scale that maps from surface coordinates
    /// to the actual device pixels.
    ///
    /// When the scale is bigger than 1, the windowing system prefers to get
    /// buffers with a resolution that is bigger than the surface size (e.g.
    /// to show the surface on a high-resolution display, or in a magnifier).
    ///
    /// Compare with [`scale_factor()`][Self::scale_factor()], which returns the
    /// next larger integer.
    ///
    /// The scale may change during the lifetime of the surface.
    ///
    /// # Returns
    ///
    /// the scale
    #[cfg(feature = "v4_12")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_12")))]
    #[doc(alias = "gdk_surface_get_scale")]
    #[doc(alias = "get_scale")]
    fn scale(&self) -> f64 {
        unsafe { ffi::gdk_surface_get_scale(self.as_ref().to_glib_none().0) }
    }

    /// Returns the internal scale factor that maps from surface coordinates
    /// to the actual device pixels.
    ///
    /// On traditional systems this is 1, but on very high density outputs
    /// this can be a higher value (often 2). A higher value means that drawing
    /// is automatically scaled up to a higher resolution, so any code doing
    /// drawing will automatically look nicer. However, if you are supplying
    /// pixel-based data the scale value can be used to determine whether to
    /// use a pixel resource with higher resolution data.
    ///
    /// The scale factor may change during the lifetime of the surface.
    ///
    /// # Returns
    ///
    /// the scale factor
    #[doc(alias = "gdk_surface_get_scale_factor")]
    #[doc(alias = "get_scale_factor")]
    #[doc(alias = "scale-factor")]
    fn scale_factor(&self) -> i32 {
        unsafe { ffi::gdk_surface_get_scale_factor(self.as_ref().to_glib_none().0) }
    }

    /// Returns the width of the given @self.
    ///
    /// Surface size is reported in ”application pixels”, not
    /// ”device pixels” (see [`scale_factor()`][Self::scale_factor()]).
    ///
    /// # Returns
    ///
    /// The width of @self
    #[doc(alias = "gdk_surface_get_width")]
    #[doc(alias = "get_width")]
    fn width(&self) -> i32 {
        unsafe { ffi::gdk_surface_get_width(self.as_ref().to_glib_none().0) }
    }

    /// Hide the surface.
    ///
    /// For toplevel surfaces, withdraws them, so they will no longer be
    /// known to the window manager; for all surfaces, unmaps them, so
    /// they won’t be displayed. Normally done automatically as
    /// part of [gtk_widget_hide()](../gtk4/method.Widget.hide.html).
    #[doc(alias = "gdk_surface_hide")]
    fn hide(&self) {
        unsafe {
            ffi::gdk_surface_hide(self.as_ref().to_glib_none().0);
        }
    }

    /// Check to see if a surface is destroyed.
    ///
    /// # Returns
    ///
    /// [`true`] if the surface is destroyed
    #[doc(alias = "gdk_surface_is_destroyed")]
    fn is_destroyed(&self) -> bool {
        unsafe {
            from_glib(ffi::gdk_surface_is_destroyed(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Forces a [`render`][struct@crate::Surface#render] signal emission for @self
    /// to be scheduled.
    ///
    /// This function is useful for implementations that track invalid
    /// regions on their own.
    #[doc(alias = "gdk_surface_queue_render")]
    fn queue_render(&self) {
        unsafe {
            ffi::gdk_surface_queue_render(self.as_ref().to_glib_none().0);
        }
    }

    /// Request a layout phase from the surface's frame clock.
    ///
    /// See [`FrameClock::request_phase()`][crate::FrameClock::request_phase()].
    #[doc(alias = "gdk_surface_request_layout")]
    fn request_layout(&self) {
        unsafe {
            ffi::gdk_surface_request_layout(self.as_ref().to_glib_none().0);
        }
    }

    /// Sets the default mouse pointer for a [`Surface`][crate::Surface].
    ///
    /// Passing [`None`] for the @cursor argument means that @self will use
    /// the cursor of its parent surface. Most surfaces should use this default.
    /// Note that @cursor must be for the same display as @self.
    ///
    /// Use [`Cursor::from_name()`][crate::Cursor::from_name()] or [`Cursor::from_texture()`][crate::Cursor::from_texture()]
    /// to create the cursor. To make the cursor invisible, use `GDK_BLANK_CURSOR`.
    /// ## `cursor`
    /// a [`Cursor`][crate::Cursor]
    #[doc(alias = "gdk_surface_set_cursor")]
    #[doc(alias = "cursor")]
    fn set_cursor(&self, cursor: Option<&Cursor>) {
        unsafe {
            ffi::gdk_surface_set_cursor(self.as_ref().to_glib_none().0, cursor.to_glib_none().0);
        }
    }

    /// Sets a specific [`Cursor`][crate::Cursor] for a given device when it gets inside @self.
    ///
    /// Passing [`None`] for the @cursor argument means that @self will use the
    /// cursor of its parent surface. Most surfaces should use this default.
    ///
    /// Use [`Cursor::from_name()`][crate::Cursor::from_name()] or [`Cursor::from_texture()`][crate::Cursor::from_texture()]
    /// to create the cursor. To make the cursor invisible, use `GDK_BLANK_CURSOR`.
    /// ## `device`
    /// a pointer [`Device`][crate::Device]
    /// ## `cursor`
    /// a [`Cursor`][crate::Cursor]
    #[doc(alias = "gdk_surface_set_device_cursor")]
    fn set_device_cursor(&self, device: &impl IsA<Device>, cursor: &Cursor) {
        unsafe {
            ffi::gdk_surface_set_device_cursor(
                self.as_ref().to_glib_none().0,
                device.as_ref().to_glib_none().0,
                cursor.to_glib_none().0,
            );
        }
    }

    /// Apply the region to the surface for the purpose of event
    /// handling.
    ///
    /// Mouse events which happen while the pointer position corresponds
    /// to an unset bit in the mask will be passed on the surface below
    /// @self.
    ///
    /// An input region is typically used with RGBA surfaces. The alpha
    /// channel of the surface defines which pixels are invisible and
    /// allows for nicely antialiased borders, and the input region
    /// controls where the surface is “clickable”.
    ///
    /// Use [`DisplayExt::supports_input_shapes()`][crate::prelude::DisplayExt::supports_input_shapes()] to find out if
    /// a particular backend supports input regions.
    /// ## `region`
    /// region of surface to be reactive,
    ///   or [`None`] to make the entire surface reactive
    #[doc(alias = "gdk_surface_set_input_region")]
    fn set_input_region(&self, region: Option<&cairo::Region>) {
        unsafe {
            ffi::gdk_surface_set_input_region(
                self.as_ref().to_glib_none().0,
                mut_override(region.to_glib_none().0),
            );
        }
    }

    /// Marks a region of the [`Surface`][crate::Surface] as opaque.
    ///
    /// For optimisation purposes, compositing window managers may
    /// like to not draw obscured regions of surfaces, or turn off blending
    /// during for these regions. With RGB windows with no transparency,
    /// this is just the shape of the window, but with ARGB32 windows, the
    /// compositor does not know what regions of the window are transparent
    /// or not.
    ///
    /// This function only works for toplevel surfaces.
    ///
    /// GTK will update this property automatically if the @self background
    /// is opaque, as we know where the opaque regions are. If your surface
    /// background is not opaque, please update this property in your
    /// [GtkWidgetClass.css_changed](../gtk4/vfunc.Widget.css_changed.html) handler.
    ///
    /// # Deprecated since 4.16
    ///
    /// GDK can figure out the opaque parts of a window itself
    ///   by inspecting the contents that are drawn.
    /// ## `region`
    /// a region, or [`None`] to make the entire
    ///   surface opaque
    #[cfg_attr(feature = "v4_16", deprecated = "Since 4.16")]
    #[allow(deprecated)]
    #[doc(alias = "gdk_surface_set_opaque_region")]
    fn set_opaque_region(&self, region: Option<&cairo::Region>) {
        unsafe {
            ffi::gdk_surface_set_opaque_region(
                self.as_ref().to_glib_none().0,
                mut_override(region.to_glib_none().0),
            );
        }
    }

    /// Emitted when @surface starts being present on the monitor.
    /// ## `monitor`
    /// the monitor
    #[doc(alias = "enter-monitor")]
    fn connect_enter_monitor<F: Fn(&Self, &Monitor) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn enter_monitor_trampoline<
            P: IsA<Surface>,
            F: Fn(&P, &Monitor) + 'static,
        >(
            this: *mut ffi::GdkSurface,
            monitor: *mut ffi::GdkMonitor,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(
                Surface::from_glib_borrow(this).unsafe_cast_ref(),
                &from_glib_borrow(monitor),
            )
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                c"enter-monitor".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    enter_monitor_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    /// Emitted when GDK receives an input event for @surface.
    /// ## `event`
    /// an input event
    ///
    /// # Returns
    ///
    /// [`true`] to indicate that the event has been handled
    #[doc(alias = "event")]
    fn connect_event<F: Fn(&Self, &Event) -> bool + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn event_trampoline<
            P: IsA<Surface>,
            F: Fn(&P, &Event) -> bool + 'static,
        >(
            this: *mut ffi::GdkSurface,
            event: *mut ffi::GdkEvent,
            f: glib::ffi::gpointer,
        ) -> glib::ffi::gboolean {
            let f: &F = &*(f as *const F);
            f(
                Surface::from_glib_borrow(this).unsafe_cast_ref(),
                &from_glib_borrow(event),
            )
            .into_glib()
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                c"event".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    event_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    /// Emitted when the size of @surface is changed, or when relayout should
    /// be performed.
    ///
    /// Surface size is reported in ”application pixels”, not
    /// ”device pixels” (see gdk_surface_get_scale_factor()).
    /// ## `width`
    /// the current width
    /// ## `height`
    /// the current height
    #[doc(alias = "layout")]
    fn connect_layout<F: Fn(&Self, i32, i32) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn layout_trampoline<P: IsA<Surface>, F: Fn(&P, i32, i32) + 'static>(
            this: *mut ffi::GdkSurface,
            width: std::ffi::c_int,
            height: std::ffi::c_int,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(
                Surface::from_glib_borrow(this).unsafe_cast_ref(),
                width,
                height,
            )
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                c"layout".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    layout_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    /// Emitted when @surface stops being present on the monitor.
    /// ## `monitor`
    /// the monitor
    #[doc(alias = "leave-monitor")]
    fn connect_leave_monitor<F: Fn(&Self, &Monitor) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn leave_monitor_trampoline<
            P: IsA<Surface>,
            F: Fn(&P, &Monitor) + 'static,
        >(
            this: *mut ffi::GdkSurface,
            monitor: *mut ffi::GdkMonitor,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(
                Surface::from_glib_borrow(this).unsafe_cast_ref(),
                &from_glib_borrow(monitor),
            )
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                c"leave-monitor".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    leave_monitor_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    /// Emitted when part of the surface needs to be redrawn.
    /// ## `region`
    /// the region that needs to be redrawn
    ///
    /// # Returns
    ///
    /// [`true`] to indicate that the signal has been handled
    #[doc(alias = "render")]
    fn connect_render<F: Fn(&Self, &cairo::Region) -> bool + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn render_trampoline<
            P: IsA<Surface>,
            F: Fn(&P, &cairo::Region) -> bool + 'static,
        >(
            this: *mut ffi::GdkSurface,
            region: *mut cairo::ffi::cairo_region_t,
            f: glib::ffi::gpointer,
        ) -> glib::ffi::gboolean {
            let f: &F = &*(f as *const F);
            f(
                Surface::from_glib_borrow(this).unsafe_cast_ref(),
                &from_glib_borrow(region),
            )
            .into_glib()
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                c"render".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    render_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "cursor")]
    fn connect_cursor_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_cursor_trampoline<P: IsA<Surface>, F: Fn(&P) + 'static>(
            this: *mut ffi::GdkSurface,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(Surface::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                c"notify::cursor".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    notify_cursor_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "height")]
    fn connect_height_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_height_trampoline<P: IsA<Surface>, F: Fn(&P) + 'static>(
            this: *mut ffi::GdkSurface,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(Surface::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                c"notify::height".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    notify_height_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "mapped")]
    fn connect_mapped_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_mapped_trampoline<P: IsA<Surface>, F: Fn(&P) + 'static>(
            this: *mut ffi::GdkSurface,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(Surface::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                c"notify::mapped".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    notify_mapped_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[cfg(feature = "v4_12")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_12")))]
    #[doc(alias = "scale")]
    fn connect_scale_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_scale_trampoline<P: IsA<Surface>, F: Fn(&P) + 'static>(
            this: *mut ffi::GdkSurface,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(Surface::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                c"notify::scale".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    notify_scale_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "scale-factor")]
    fn connect_scale_factor_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_scale_factor_trampoline<
            P: IsA<Surface>,
            F: Fn(&P) + 'static,
        >(
            this: *mut ffi::GdkSurface,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(Surface::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                c"notify::scale-factor".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    notify_scale_factor_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "width")]
    fn connect_width_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_width_trampoline<P: IsA<Surface>, F: Fn(&P) + 'static>(
            this: *mut ffi::GdkSurface,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(Surface::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                c"notify::width".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    notify_width_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }
}

impl<O: IsA<Surface>> SurfaceExt for O {}