gtk4/auto/

print_settings.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

use crate::{
    NumberUpLayout, PageOrientation, PageRange, PageSet, PaperSize, PrintDuplex, PrintPages,
    PrintQuality, Unit, ffi,
};
use glib::translate::*;

glib::wrapper! {
    /// t have
    /// to re-set all his settings.
    ///
    /// Its also possible to enumerate the settings so that you can easily save
    /// the settings for the next time your app runs, or even store them in a
    /// document. The predefined keys try to use shared values as much as possible
    /// so that moving such a document between systems still works.
    ///
    /// # Implements
    ///
    /// [`trait@glib::ObjectExt`]
    #[doc(alias = "GtkPrintSettings")]
    pub struct PrintSettings(Object<ffi::GtkPrintSettings>);

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

impl PrintSettings {
    /// Creates a new [`PrintSettings`][crate::PrintSettings] object.
    ///
    /// # Returns
    ///
    /// a new [`PrintSettings`][crate::PrintSettings] object
    #[doc(alias = "gtk_print_settings_new")]
    pub fn new() -> PrintSettings {
        assert_initialized_main_thread!();
        unsafe { from_glib_full(ffi::gtk_print_settings_new()) }
    }

    /// Reads the print settings from @file_name.
    ///
    /// Returns a new [`PrintSettings`][crate::PrintSettings] object with the restored settings,
    /// or [`None`] if an error occurred. If the file could not be loaded then
    /// error is set to either a `GFileError` or `GKeyFileError`.
    ///
    /// See [`to_file()`][Self::to_file()].
    /// ## `file_name`
    /// the filename to read the settings from
    ///
    /// # Returns
    ///
    /// the restored [`PrintSettings`][crate::PrintSettings]
    #[doc(alias = "gtk_print_settings_new_from_file")]
    #[doc(alias = "new_from_file")]
    pub fn from_file(file_name: impl AsRef<std::path::Path>) -> Result<PrintSettings, glib::Error> {
        assert_initialized_main_thread!();
        unsafe {
            let mut error = std::ptr::null_mut();
            let ret = ffi::gtk_print_settings_new_from_file(
                file_name.as_ref().to_glib_none().0,
                &mut error,
            );
            if error.is_null() {
                Ok(from_glib_full(ret))
            } else {
                Err(from_glib_full(error))
            }
        }
    }

    /// Deserialize print settings from an a{sv} variant.
    ///
    /// The variant must be in the format produced by
    /// [`to_gvariant()`][Self::to_gvariant()].
    /// ## `variant`
    /// an a{sv} `GVariant`
    ///
    /// # Returns
    ///
    /// a new [`PrintSettings`][crate::PrintSettings] object
    #[doc(alias = "gtk_print_settings_new_from_gvariant")]
    #[doc(alias = "new_from_gvariant")]
    pub fn from_gvariant(variant: &glib::Variant) -> PrintSettings {
        assert_initialized_main_thread!();
        unsafe {
            from_glib_full(ffi::gtk_print_settings_new_from_gvariant(
                variant.to_glib_none().0,
            ))
        }
    }

    /// Reads the print settings from the group @group_name in @key_file.
    ///
    /// Returns a new [`PrintSettings`][crate::PrintSettings] object with the restored settings,
    /// or [`None`] if an error occurred. If the file could not be loaded then
    /// error is set to either `GFileError` or `GKeyFileError`.
    /// ## `key_file`
    /// the `GKeyFile` to retrieve the settings from
    /// ## `group_name`
    /// Print Settings
    ///
    /// # Returns
    ///
    /// the restored [`PrintSettings`][crate::PrintSettings]
    #[doc(alias = "gtk_print_settings_new_from_key_file")]
    #[doc(alias = "new_from_key_file")]
    pub fn from_key_file(
        key_file: &glib::KeyFile,
        group_name: Option<&str>,
    ) -> Result<PrintSettings, glib::Error> {
        assert_initialized_main_thread!();
        unsafe {
            let mut error = std::ptr::null_mut();
            let ret = ffi::gtk_print_settings_new_from_key_file(
                key_file.to_glib_none().0,
                group_name.to_glib_none().0,
                &mut error,
            );
            if error.is_null() {
                Ok(from_glib_full(ret))
            } else {
                Err(from_glib_full(error))
            }
        }
    }

    #[doc(alias = "gtk_print_settings_copy")]
    #[must_use]
    pub fn copy(&self) -> PrintSettings {
        unsafe { from_glib_full(ffi::gtk_print_settings_copy(self.to_glib_none().0)) }
    }

    /// Calls @func for each key-value pair of @self.
    /// ## `func`
    /// the function to call
    #[doc(alias = "gtk_print_settings_foreach")]
    pub fn foreach<P: FnMut(&str, &str)>(&self, func: P) {
        let mut func_data: P = func;
        unsafe extern "C" fn func_func<P: FnMut(&str, &str)>(
            key: *const std::ffi::c_char,
            value: *const std::ffi::c_char,
            user_data: glib::ffi::gpointer,
        ) {
            unsafe {
                let key: Borrowed<glib::GString> = from_glib_borrow(key);
                let value: Borrowed<glib::GString> = from_glib_borrow(value);
                let callback = user_data as *mut P;
                (*callback)(key.as_str(), value.as_str())
            }
        }
        let func = Some(func_func::<P> as _);
        let super_callback0: &mut P = &mut func_data;
        unsafe {
            ffi::gtk_print_settings_foreach(
                self.to_glib_none().0,
                func,
                super_callback0 as *mut _ as *mut _,
            );
        }
    }

    /// Looks up the string value associated with @key.
    /// ## `key`
    /// a key
    ///
    /// # Returns
    ///
    /// the string value for @key
    #[doc(alias = "gtk_print_settings_get")]
    pub fn get(&self, key: &str) -> Option<glib::GString> {
        unsafe {
            from_glib_none(ffi::gtk_print_settings_get(
                self.to_glib_none().0,
                key.to_glib_none().0,
            ))
        }
    }

    ///  represents [`true`], any other
    /// string [`false`].
    /// ## `key`
    /// a key
    ///
    /// # Returns
    ///
    /// [`true`], if @key maps to a true value.
    #[doc(alias = "gtk_print_settings_get_bool")]
    #[doc(alias = "get_bool")]
    pub fn bool(&self, key: &str) -> bool {
        unsafe {
            from_glib(ffi::gtk_print_settings_get_bool(
                self.to_glib_none().0,
                key.to_glib_none().0,
            ))
        }
    }

    /// Gets the value of [`PRINT_SETTINGS_COLLATE`][crate::PRINT_SETTINGS_COLLATE].
    ///
    /// # Returns
    ///
    /// whether to collate the printed pages
    #[doc(alias = "gtk_print_settings_get_collate")]
    #[doc(alias = "get_collate")]
    pub fn is_collate(&self) -> bool {
        unsafe { from_glib(ffi::gtk_print_settings_get_collate(self.to_glib_none().0)) }
    }

    /// Gets the value of [`PRINT_SETTINGS_DEFAULT_SOURCE`][crate::PRINT_SETTINGS_DEFAULT_SOURCE].
    ///
    /// # Returns
    ///
    /// the default source
    #[doc(alias = "gtk_print_settings_get_default_source")]
    #[doc(alias = "get_default_source")]
    pub fn default_source(&self) -> Option<glib::GString> {
        unsafe {
            from_glib_none(ffi::gtk_print_settings_get_default_source(
                self.to_glib_none().0,
            ))
        }
    }

    /// Gets the value of [`PRINT_SETTINGS_DITHER`][crate::PRINT_SETTINGS_DITHER].
    ///
    /// # Returns
    ///
    /// the dithering that is used
    #[doc(alias = "gtk_print_settings_get_dither")]
    #[doc(alias = "get_dither")]
    pub fn dither(&self) -> Option<glib::GString> {
        unsafe { from_glib_none(ffi::gtk_print_settings_get_dither(self.to_glib_none().0)) }
    }

    /// Returns the double value associated with @key, or 0.
    /// ## `key`
    /// a key
    ///
    /// # Returns
    ///
    /// the double value of @key
    #[doc(alias = "gtk_print_settings_get_double")]
    #[doc(alias = "get_double")]
    pub fn double(&self, key: &str) -> f64 {
        unsafe { ffi::gtk_print_settings_get_double(self.to_glib_none().0, key.to_glib_none().0) }
    }

    /// Returns the floating point number represented by
    /// the value that is associated with @key, or @default_val
    /// if the value does not represent a floating point number.
    ///
    /// Floating point numbers are parsed with g_ascii_strtod().
    /// ## `key`
    /// a key
    /// ## `def`
    /// the default value
    ///
    /// # Returns
    ///
    /// the floating point number associated with @key
    #[doc(alias = "gtk_print_settings_get_double_with_default")]
    #[doc(alias = "get_double_with_default")]
    pub fn double_with_default(&self, key: &str, def: f64) -> f64 {
        unsafe {
            ffi::gtk_print_settings_get_double_with_default(
                self.to_glib_none().0,
                key.to_glib_none().0,
                def,
            )
        }
    }

    /// Gets the value of [`PRINT_SETTINGS_DUPLEX`][crate::PRINT_SETTINGS_DUPLEX].
    ///
    /// # Returns
    ///
    /// whether to print the output in duplex.
    #[doc(alias = "gtk_print_settings_get_duplex")]
    #[doc(alias = "get_duplex")]
    pub fn duplex(&self) -> PrintDuplex {
        unsafe { from_glib(ffi::gtk_print_settings_get_duplex(self.to_glib_none().0)) }
    }

    /// Gets the value of [`PRINT_SETTINGS_FINISHINGS`][crate::PRINT_SETTINGS_FINISHINGS].
    ///
    /// # Returns
    ///
    /// the finishings
    #[doc(alias = "gtk_print_settings_get_finishings")]
    #[doc(alias = "get_finishings")]
    pub fn finishings(&self) -> Option<glib::GString> {
        unsafe {
            from_glib_none(ffi::gtk_print_settings_get_finishings(
                self.to_glib_none().0,
            ))
        }
    }

    /// Returns the integer value of @key, or 0.
    /// ## `key`
    /// a key
    ///
    /// # Returns
    ///
    /// the integer value of @key
    #[doc(alias = "gtk_print_settings_get_int")]
    #[doc(alias = "get_int")]
    pub fn int(&self, key: &str) -> i32 {
        unsafe { ffi::gtk_print_settings_get_int(self.to_glib_none().0, key.to_glib_none().0) }
    }

    /// Returns the value of @key, interpreted as
    /// an integer, or the default value.
    /// ## `key`
    /// a key
    /// ## `def`
    /// the default value
    ///
    /// # Returns
    ///
    /// the integer value of @key
    #[doc(alias = "gtk_print_settings_get_int_with_default")]
    #[doc(alias = "get_int_with_default")]
    pub fn int_with_default(&self, key: &str, def: i32) -> i32 {
        unsafe {
            ffi::gtk_print_settings_get_int_with_default(
                self.to_glib_none().0,
                key.to_glib_none().0,
                def,
            )
        }
    }

    /// Returns the value associated with @key, interpreted
    /// as a length.
    ///
    /// The returned value is converted to @units.
    /// ## `key`
    /// a key
    /// ## `unit`
    /// the unit of the return value
    ///
    /// # Returns
    ///
    /// the length value of @key, converted to @unit
    #[doc(alias = "gtk_print_settings_get_length")]
    #[doc(alias = "get_length")]
    pub fn length(&self, key: &str, unit: Unit) -> f64 {
        unsafe {
            ffi::gtk_print_settings_get_length(
                self.to_glib_none().0,
                key.to_glib_none().0,
                unit.into_glib(),
            )
        }
    }

    /// Gets the value of [`PRINT_SETTINGS_MEDIA_TYPE`][crate::PRINT_SETTINGS_MEDIA_TYPE].
    ///
    /// The set of media types is defined in PWG 5101.1-2002 PWG.
    ///
    /// # Returns
    ///
    /// the media type
    #[doc(alias = "gtk_print_settings_get_media_type")]
    #[doc(alias = "get_media_type")]
    pub fn media_type(&self) -> Option<glib::GString> {
        unsafe {
            from_glib_none(ffi::gtk_print_settings_get_media_type(
                self.to_glib_none().0,
            ))
        }
    }

    /// Gets the value of [`PRINT_SETTINGS_N_COPIES`][crate::PRINT_SETTINGS_N_COPIES].
    ///
    /// # Returns
    ///
    /// the number of copies to print
    #[doc(alias = "gtk_print_settings_get_n_copies")]
    #[doc(alias = "get_n_copies")]
    pub fn n_copies(&self) -> i32 {
        unsafe { ffi::gtk_print_settings_get_n_copies(self.to_glib_none().0) }
    }

    /// Gets the value of [`PRINT_SETTINGS_NUMBER_UP`][crate::PRINT_SETTINGS_NUMBER_UP].
    ///
    /// # Returns
    ///
    /// the number of pages per sheet
    #[doc(alias = "gtk_print_settings_get_number_up")]
    #[doc(alias = "get_number_up")]
    pub fn number_up(&self) -> i32 {
        unsafe { ffi::gtk_print_settings_get_number_up(self.to_glib_none().0) }
    }

    /// Gets the value of [`PRINT_SETTINGS_NUMBER_UP_LAYOUT`][crate::PRINT_SETTINGS_NUMBER_UP_LAYOUT].
    ///
    /// # Returns
    ///
    /// layout of page in number-up mode
    #[doc(alias = "gtk_print_settings_get_number_up_layout")]
    #[doc(alias = "get_number_up_layout")]
    pub fn number_up_layout(&self) -> NumberUpLayout {
        unsafe {
            from_glib(ffi::gtk_print_settings_get_number_up_layout(
                self.to_glib_none().0,
            ))
        }
    }

    /// Get the value of [`PRINT_SETTINGS_ORIENTATION`][crate::PRINT_SETTINGS_ORIENTATION],
    /// converted to a [`PageOrientation`][crate::PageOrientation].
    ///
    /// # Returns
    ///
    /// the orientation
    #[doc(alias = "gtk_print_settings_get_orientation")]
    #[doc(alias = "get_orientation")]
    pub fn orientation(&self) -> PageOrientation {
        unsafe {
            from_glib(ffi::gtk_print_settings_get_orientation(
                self.to_glib_none().0,
            ))
        }
    }

    /// Gets the value of [`PRINT_SETTINGS_OUTPUT_BIN`][crate::PRINT_SETTINGS_OUTPUT_BIN].
    ///
    /// # Returns
    ///
    /// the output bin
    #[doc(alias = "gtk_print_settings_get_output_bin")]
    #[doc(alias = "get_output_bin")]
    pub fn output_bin(&self) -> Option<glib::GString> {
        unsafe {
            from_glib_none(ffi::gtk_print_settings_get_output_bin(
                self.to_glib_none().0,
            ))
        }
    }

    /// Gets the value of [`PRINT_SETTINGS_PAGE_RANGES`][crate::PRINT_SETTINGS_PAGE_RANGES].
    ///
    /// # Returns
    ///
    /// an array
    ///   of [`PageRange`][crate::PageRange]s. Use g_free() to free the array when
    ///   it is no longer needed.
    #[doc(alias = "gtk_print_settings_get_page_ranges")]
    #[doc(alias = "get_page_ranges")]
    pub fn page_ranges(&self) -> Vec<PageRange> {
        unsafe {
            let mut num_ranges = std::mem::MaybeUninit::uninit();
            let ret = FromGlibContainer::from_glib_full_num(
                ffi::gtk_print_settings_get_page_ranges(
                    self.to_glib_none().0,
                    num_ranges.as_mut_ptr(),
                ),
                num_ranges.assume_init() as _,
            );
            ret
        }
    }

    /// Gets the value of [`PRINT_SETTINGS_PAGE_SET`][crate::PRINT_SETTINGS_PAGE_SET].
    ///
    /// # Returns
    ///
    /// the set of pages to print
    #[doc(alias = "gtk_print_settings_get_page_set")]
    #[doc(alias = "get_page_set")]
    pub fn page_set(&self) -> PageSet {
        unsafe { from_glib(ffi::gtk_print_settings_get_page_set(self.to_glib_none().0)) }
    }

    /// Gets the value of [`PRINT_SETTINGS_PAPER_HEIGHT`][crate::PRINT_SETTINGS_PAPER_HEIGHT],
    /// converted to @unit.
    /// ## `unit`
    /// the unit for the return value
    ///
    /// # Returns
    ///
    /// the paper height, in units of @unit
    #[doc(alias = "gtk_print_settings_get_paper_height")]
    #[doc(alias = "get_paper_height")]
    pub fn paper_height(&self, unit: Unit) -> f64 {
        unsafe { ffi::gtk_print_settings_get_paper_height(self.to_glib_none().0, unit.into_glib()) }
    }

    /// Gets the value of [`PRINT_SETTINGS_PAPER_FORMAT`][crate::PRINT_SETTINGS_PAPER_FORMAT],
    /// converted to a [`PaperSize`][crate::PaperSize].
    ///
    /// # Returns
    ///
    /// the paper size
    #[doc(alias = "gtk_print_settings_get_paper_size")]
    #[doc(alias = "get_paper_size")]
    pub fn paper_size(&self) -> Option<PaperSize> {
        unsafe {
            from_glib_full(ffi::gtk_print_settings_get_paper_size(
                self.to_glib_none().0,
            ))
        }
    }

    /// Gets the value of [`PRINT_SETTINGS_PAPER_WIDTH`][crate::PRINT_SETTINGS_PAPER_WIDTH],
    /// converted to @unit.
    /// ## `unit`
    /// the unit for the return value
    ///
    /// # Returns
    ///
    /// the paper width, in units of @unit
    #[doc(alias = "gtk_print_settings_get_paper_width")]
    #[doc(alias = "get_paper_width")]
    pub fn paper_width(&self, unit: Unit) -> f64 {
        unsafe { ffi::gtk_print_settings_get_paper_width(self.to_glib_none().0, unit.into_glib()) }
    }

    /// Gets the value of [`PRINT_SETTINGS_PRINT_PAGES`][crate::PRINT_SETTINGS_PRINT_PAGES].
    ///
    /// # Returns
    ///
    /// which pages to print
    #[doc(alias = "gtk_print_settings_get_print_pages")]
    #[doc(alias = "get_print_pages")]
    pub fn print_pages(&self) -> PrintPages {
        unsafe {
            from_glib(ffi::gtk_print_settings_get_print_pages(
                self.to_glib_none().0,
            ))
        }
    }

    /// Convenience function to obtain the value of
    /// [`PRINT_SETTINGS_PRINTER`][crate::PRINT_SETTINGS_PRINTER].
    ///
    /// # Returns
    ///
    /// the printer name
    #[doc(alias = "gtk_print_settings_get_printer")]
    #[doc(alias = "get_printer")]
    pub fn printer(&self) -> Option<glib::GString> {
        unsafe { from_glib_none(ffi::gtk_print_settings_get_printer(self.to_glib_none().0)) }
    }

    /// Gets the value of [`PRINT_SETTINGS_PRINTER_LPI`][crate::PRINT_SETTINGS_PRINTER_LPI].
    ///
    /// # Returns
    ///
    /// the resolution in lpi (lines per inch)
    #[doc(alias = "gtk_print_settings_get_printer_lpi")]
    #[doc(alias = "get_printer_lpi")]
    pub fn printer_lpi(&self) -> f64 {
        unsafe { ffi::gtk_print_settings_get_printer_lpi(self.to_glib_none().0) }
    }

    /// Gets the value of [`PRINT_SETTINGS_QUALITY`][crate::PRINT_SETTINGS_QUALITY].
    ///
    /// # Returns
    ///
    /// the print quality
    #[doc(alias = "gtk_print_settings_get_quality")]
    #[doc(alias = "get_quality")]
    pub fn quality(&self) -> PrintQuality {
        unsafe { from_glib(ffi::gtk_print_settings_get_quality(self.to_glib_none().0)) }
    }

    /// Gets the value of [`PRINT_SETTINGS_RESOLUTION`][crate::PRINT_SETTINGS_RESOLUTION].
    ///
    /// # Returns
    ///
    /// the resolution in dpi
    #[doc(alias = "gtk_print_settings_get_resolution")]
    #[doc(alias = "get_resolution")]
    pub fn resolution(&self) -> i32 {
        unsafe { ffi::gtk_print_settings_get_resolution(self.to_glib_none().0) }
    }

    /// Gets the value of [`PRINT_SETTINGS_RESOLUTION_X`][crate::PRINT_SETTINGS_RESOLUTION_X].
    ///
    /// # Returns
    ///
    /// the horizontal resolution in dpi
    #[doc(alias = "gtk_print_settings_get_resolution_x")]
    #[doc(alias = "get_resolution_x")]
    pub fn resolution_x(&self) -> i32 {
        unsafe { ffi::gtk_print_settings_get_resolution_x(self.to_glib_none().0) }
    }

    /// Gets the value of [`PRINT_SETTINGS_RESOLUTION_Y`][crate::PRINT_SETTINGS_RESOLUTION_Y].
    ///
    /// # Returns
    ///
    /// the vertical resolution in dpi
    #[doc(alias = "gtk_print_settings_get_resolution_y")]
    #[doc(alias = "get_resolution_y")]
    pub fn resolution_y(&self) -> i32 {
        unsafe { ffi::gtk_print_settings_get_resolution_y(self.to_glib_none().0) }
    }

    /// Gets the value of [`PRINT_SETTINGS_REVERSE`][crate::PRINT_SETTINGS_REVERSE].
    ///
    /// # Returns
    ///
    /// whether to reverse the order of the printed pages
    #[doc(alias = "gtk_print_settings_get_reverse")]
    #[doc(alias = "get_reverse")]
    pub fn is_reverse(&self) -> bool {
        unsafe { from_glib(ffi::gtk_print_settings_get_reverse(self.to_glib_none().0)) }
    }

    /// Gets the value of [`PRINT_SETTINGS_SCALE`][crate::PRINT_SETTINGS_SCALE].
    ///
    /// # Returns
    ///
    /// the scale in percent
    #[doc(alias = "gtk_print_settings_get_scale")]
    #[doc(alias = "get_scale")]
    pub fn scale(&self) -> f64 {
        unsafe { ffi::gtk_print_settings_get_scale(self.to_glib_none().0) }
    }

    /// Gets the value of [`PRINT_SETTINGS_USE_COLOR`][crate::PRINT_SETTINGS_USE_COLOR].
    ///
    /// # Returns
    ///
    /// whether to use color
    #[doc(alias = "gtk_print_settings_get_use_color")]
    #[doc(alias = "get_use_color")]
    pub fn uses_color(&self) -> bool {
        unsafe { from_glib(ffi::gtk_print_settings_get_use_color(self.to_glib_none().0)) }
    }

    /// Returns [`true`], if a value is associated with @key.
    /// ## `key`
    /// a key
    ///
    /// # Returns
    ///
    /// [`true`], if @key has a value
    #[doc(alias = "gtk_print_settings_has_key")]
    pub fn has_key(&self, key: &str) -> bool {
        unsafe {
            from_glib(ffi::gtk_print_settings_has_key(
                self.to_glib_none().0,
                key.to_glib_none().0,
            ))
        }
    }

    /// Reads the print settings from @file_name.
    ///
    /// If the file could not be loaded then error is set to either
    /// a `GFileError` or `GKeyFileError`.
    ///
    /// See [`to_file()`][Self::to_file()].
    /// ## `file_name`
    /// the filename to read the settings from
    ///
    /// # Returns
    ///
    /// [`true`] on success
    #[doc(alias = "gtk_print_settings_load_file")]
    pub fn load_file(&self, file_name: impl AsRef<std::path::Path>) -> Result<(), glib::Error> {
        unsafe {
            let mut error = std::ptr::null_mut();
            let is_ok = ffi::gtk_print_settings_load_file(
                self.to_glib_none().0,
                file_name.as_ref().to_glib_none().0,
                &mut error,
            );
            debug_assert_eq!(is_ok == glib::ffi::GFALSE, !error.is_null());
            if error.is_null() {
                Ok(())
            } else {
                Err(from_glib_full(error))
            }
        }
    }

    /// Reads the print settings from the group @group_name in @key_file.
    ///
    /// If the file could not be loaded then error is set to either a
    /// `GFileError` or `GKeyFileError`.
    /// ## `key_file`
    /// the `GKeyFile` to retrieve the settings from
    /// ## `group_name`
    /// Print Settings
    ///
    /// # Returns
    ///
    /// [`true`] on success
    #[doc(alias = "gtk_print_settings_load_key_file")]
    pub fn load_key_file(
        &self,
        key_file: &glib::KeyFile,
        group_name: Option<&str>,
    ) -> Result<(), glib::Error> {
        unsafe {
            let mut error = std::ptr::null_mut();
            let is_ok = ffi::gtk_print_settings_load_key_file(
                self.to_glib_none().0,
                key_file.to_glib_none().0,
                group_name.to_glib_none().0,
                &mut error,
            );
            debug_assert_eq!(is_ok == glib::ffi::GFALSE, !error.is_null());
            if error.is_null() {
                Ok(())
            } else {
                Err(from_glib_full(error))
            }
        }
    }

    /// Associates @value with @key.
    /// ## `key`
    /// a key
    /// ## `value`
    /// a string value
    #[doc(alias = "gtk_print_settings_set")]
    pub fn set(&self, key: &str, value: Option<&str>) {
        unsafe {
            ffi::gtk_print_settings_set(
                self.to_glib_none().0,
                key.to_glib_none().0,
                value.to_glib_none().0,
            );
        }
    }

    /// Sets @key to a boolean value.
    /// ## `key`
    /// a key
    /// ## `value`
    /// a boolean
    #[doc(alias = "gtk_print_settings_set_bool")]
    pub fn set_bool(&self, key: &str, value: bool) {
        unsafe {
            ffi::gtk_print_settings_set_bool(
                self.to_glib_none().0,
                key.to_glib_none().0,
                value.into_glib(),
            );
        }
    }

    /// Sets the value of [`PRINT_SETTINGS_COLLATE`][crate::PRINT_SETTINGS_COLLATE].
    /// ## `collate`
    /// whether to collate the output
    #[doc(alias = "gtk_print_settings_set_collate")]
    pub fn set_collate(&self, collate: bool) {
        unsafe {
            ffi::gtk_print_settings_set_collate(self.to_glib_none().0, collate.into_glib());
        }
    }

    /// Sets the value of [`PRINT_SETTINGS_DEFAULT_SOURCE`][crate::PRINT_SETTINGS_DEFAULT_SOURCE].
    /// ## `default_source`
    /// the default source
    #[doc(alias = "gtk_print_settings_set_default_source")]
    pub fn set_default_source(&self, default_source: &str) {
        unsafe {
            ffi::gtk_print_settings_set_default_source(
                self.to_glib_none().0,
                default_source.to_glib_none().0,
            );
        }
    }

    /// Sets the value of [`PRINT_SETTINGS_DITHER`][crate::PRINT_SETTINGS_DITHER].
    /// ## `dither`
    /// the dithering that is used
    #[doc(alias = "gtk_print_settings_set_dither")]
    pub fn set_dither(&self, dither: &str) {
        unsafe {
            ffi::gtk_print_settings_set_dither(self.to_glib_none().0, dither.to_glib_none().0);
        }
    }

    /// Sets @key to a double value.
    /// ## `key`
    /// a key
    /// ## `value`
    /// a double value
    #[doc(alias = "gtk_print_settings_set_double")]
    pub fn set_double(&self, key: &str, value: f64) {
        unsafe {
            ffi::gtk_print_settings_set_double(self.to_glib_none().0, key.to_glib_none().0, value);
        }
    }

    /// Sets the value of [`PRINT_SETTINGS_DUPLEX`][crate::PRINT_SETTINGS_DUPLEX].
    /// ## `duplex`
    /// a [`PrintDuplex`][crate::PrintDuplex] value
    #[doc(alias = "gtk_print_settings_set_duplex")]
    pub fn set_duplex(&self, duplex: PrintDuplex) {
        unsafe {
            ffi::gtk_print_settings_set_duplex(self.to_glib_none().0, duplex.into_glib());
        }
    }

    /// Sets the value of [`PRINT_SETTINGS_FINISHINGS`][crate::PRINT_SETTINGS_FINISHINGS].
    /// ## `finishings`
    /// the finishings
    #[doc(alias = "gtk_print_settings_set_finishings")]
    pub fn set_finishings(&self, finishings: &str) {
        unsafe {
            ffi::gtk_print_settings_set_finishings(
                self.to_glib_none().0,
                finishings.to_glib_none().0,
            );
        }
    }

    /// Sets @key to an integer value.
    /// ## `key`
    /// a key
    /// ## `value`
    /// an integer
    #[doc(alias = "gtk_print_settings_set_int")]
    pub fn set_int(&self, key: &str, value: i32) {
        unsafe {
            ffi::gtk_print_settings_set_int(self.to_glib_none().0, key.to_glib_none().0, value);
        }
    }

    /// Associates a length in units of @unit with @key.
    /// ## `key`
    /// a key
    /// ## `value`
    /// a length
    /// ## `unit`
    /// the unit of @length
    #[doc(alias = "gtk_print_settings_set_length")]
    pub fn set_length(&self, key: &str, value: f64, unit: Unit) {
        unsafe {
            ffi::gtk_print_settings_set_length(
                self.to_glib_none().0,
                key.to_glib_none().0,
                value,
                unit.into_glib(),
            );
        }
    }

    /// Sets the value of [`PRINT_SETTINGS_MEDIA_TYPE`][crate::PRINT_SETTINGS_MEDIA_TYPE].
    ///
    /// The set of media types is defined in PWG 5101.1-2002 PWG.
    /// ## `media_type`
    /// the media type
    #[doc(alias = "gtk_print_settings_set_media_type")]
    pub fn set_media_type(&self, media_type: &str) {
        unsafe {
            ffi::gtk_print_settings_set_media_type(
                self.to_glib_none().0,
                media_type.to_glib_none().0,
            );
        }
    }

    /// Sets the value of [`PRINT_SETTINGS_N_COPIES`][crate::PRINT_SETTINGS_N_COPIES].
    /// ## `num_copies`
    /// the number of copies
    #[doc(alias = "gtk_print_settings_set_n_copies")]
    pub fn set_n_copies(&self, num_copies: i32) {
        unsafe {
            ffi::gtk_print_settings_set_n_copies(self.to_glib_none().0, num_copies);
        }
    }

    /// Sets the value of [`PRINT_SETTINGS_NUMBER_UP`][crate::PRINT_SETTINGS_NUMBER_UP].
    /// ## `number_up`
    /// the number of pages per sheet
    #[doc(alias = "gtk_print_settings_set_number_up")]
    pub fn set_number_up(&self, number_up: i32) {
        unsafe {
            ffi::gtk_print_settings_set_number_up(self.to_glib_none().0, number_up);
        }
    }

    /// Sets the value of [`PRINT_SETTINGS_NUMBER_UP_LAYOUT`][crate::PRINT_SETTINGS_NUMBER_UP_LAYOUT].
    /// ## `number_up_layout`
    /// a [`NumberUpLayout`][crate::NumberUpLayout] value
    #[doc(alias = "gtk_print_settings_set_number_up_layout")]
    pub fn set_number_up_layout(&self, number_up_layout: NumberUpLayout) {
        unsafe {
            ffi::gtk_print_settings_set_number_up_layout(
                self.to_glib_none().0,
                number_up_layout.into_glib(),
            );
        }
    }

    /// Sets the value of [`PRINT_SETTINGS_ORIENTATION`][crate::PRINT_SETTINGS_ORIENTATION].
    /// ## `orientation`
    /// a page orientation
    #[doc(alias = "gtk_print_settings_set_orientation")]
    pub fn set_orientation(&self, orientation: PageOrientation) {
        unsafe {
            ffi::gtk_print_settings_set_orientation(self.to_glib_none().0, orientation.into_glib());
        }
    }

    /// Sets the value of [`PRINT_SETTINGS_OUTPUT_BIN`][crate::PRINT_SETTINGS_OUTPUT_BIN].
    /// ## `output_bin`
    /// the output bin
    #[doc(alias = "gtk_print_settings_set_output_bin")]
    pub fn set_output_bin(&self, output_bin: &str) {
        unsafe {
            ffi::gtk_print_settings_set_output_bin(
                self.to_glib_none().0,
                output_bin.to_glib_none().0,
            );
        }
    }

    /// Sets the value of [`PRINT_SETTINGS_PAGE_SET`][crate::PRINT_SETTINGS_PAGE_SET].
    /// ## `page_set`
    /// a [`PageSet`][crate::PageSet] value
    #[doc(alias = "gtk_print_settings_set_page_set")]
    pub fn set_page_set(&self, page_set: PageSet) {
        unsafe {
            ffi::gtk_print_settings_set_page_set(self.to_glib_none().0, page_set.into_glib());
        }
    }

    /// Sets the value of [`PRINT_SETTINGS_PAPER_HEIGHT`][crate::PRINT_SETTINGS_PAPER_HEIGHT].
    /// ## `height`
    /// the paper height
    /// ## `unit`
    /// the units of @height
    #[doc(alias = "gtk_print_settings_set_paper_height")]
    pub fn set_paper_height(&self, height: f64, unit: Unit) {
        unsafe {
            ffi::gtk_print_settings_set_paper_height(
                self.to_glib_none().0,
                height,
                unit.into_glib(),
            );
        }
    }

    /// Sets the value of [`PRINT_SETTINGS_PAPER_FORMAT`][crate::PRINT_SETTINGS_PAPER_FORMAT],
    /// [`PRINT_SETTINGS_PAPER_WIDTH`][crate::PRINT_SETTINGS_PAPER_WIDTH] and
    /// [`PRINT_SETTINGS_PAPER_HEIGHT`][crate::PRINT_SETTINGS_PAPER_HEIGHT].
    /// ## `paper_size`
    /// a paper size
    #[doc(alias = "gtk_print_settings_set_paper_size")]
    pub fn set_paper_size(&self, paper_size: &PaperSize) {
        unsafe {
            ffi::gtk_print_settings_set_paper_size(
                self.to_glib_none().0,
                mut_override(paper_size.to_glib_none().0),
            );
        }
    }

    /// Sets the value of [`PRINT_SETTINGS_PAPER_WIDTH`][crate::PRINT_SETTINGS_PAPER_WIDTH].
    /// ## `width`
    /// the paper width
    /// ## `unit`
    /// the units of @width
    #[doc(alias = "gtk_print_settings_set_paper_width")]
    pub fn set_paper_width(&self, width: f64, unit: Unit) {
        unsafe {
            ffi::gtk_print_settings_set_paper_width(self.to_glib_none().0, width, unit.into_glib());
        }
    }

    /// Sets the value of [`PRINT_SETTINGS_PRINT_PAGES`][crate::PRINT_SETTINGS_PRINT_PAGES].
    /// ## `pages`
    /// a [`PrintPages`][crate::PrintPages] value
    #[doc(alias = "gtk_print_settings_set_print_pages")]
    pub fn set_print_pages(&self, pages: PrintPages) {
        unsafe {
            ffi::gtk_print_settings_set_print_pages(self.to_glib_none().0, pages.into_glib());
        }
    }

    /// Convenience function to set [`PRINT_SETTINGS_PRINTER`][crate::PRINT_SETTINGS_PRINTER]
    /// to @printer.
    /// ## `printer`
    /// the printer name
    #[doc(alias = "gtk_print_settings_set_printer")]
    pub fn set_printer(&self, printer: &str) {
        unsafe {
            ffi::gtk_print_settings_set_printer(self.to_glib_none().0, printer.to_glib_none().0);
        }
    }

    /// Sets the value of [`PRINT_SETTINGS_PRINTER_LPI`][crate::PRINT_SETTINGS_PRINTER_LPI].
    /// ## `lpi`
    /// the resolution in lpi (lines per inch)
    #[doc(alias = "gtk_print_settings_set_printer_lpi")]
    pub fn set_printer_lpi(&self, lpi: f64) {
        unsafe {
            ffi::gtk_print_settings_set_printer_lpi(self.to_glib_none().0, lpi);
        }
    }

    /// Sets the value of [`PRINT_SETTINGS_QUALITY`][crate::PRINT_SETTINGS_QUALITY].
    /// ## `quality`
    /// a [`PrintQuality`][crate::PrintQuality] value
    #[doc(alias = "gtk_print_settings_set_quality")]
    pub fn set_quality(&self, quality: PrintQuality) {
        unsafe {
            ffi::gtk_print_settings_set_quality(self.to_glib_none().0, quality.into_glib());
        }
    }

    /// Sets the values of [`PRINT_SETTINGS_RESOLUTION`][crate::PRINT_SETTINGS_RESOLUTION],
    /// [`PRINT_SETTINGS_RESOLUTION_X`][crate::PRINT_SETTINGS_RESOLUTION_X] and
    /// [`PRINT_SETTINGS_RESOLUTION_Y`][crate::PRINT_SETTINGS_RESOLUTION_Y].
    /// ## `resolution`
    /// the resolution in dpi
    #[doc(alias = "gtk_print_settings_set_resolution")]
    pub fn set_resolution(&self, resolution: i32) {
        unsafe {
            ffi::gtk_print_settings_set_resolution(self.to_glib_none().0, resolution);
        }
    }

    /// Sets the values of [`PRINT_SETTINGS_RESOLUTION`][crate::PRINT_SETTINGS_RESOLUTION],
    /// [`PRINT_SETTINGS_RESOLUTION_X`][crate::PRINT_SETTINGS_RESOLUTION_X] and
    /// [`PRINT_SETTINGS_RESOLUTION_Y`][crate::PRINT_SETTINGS_RESOLUTION_Y].
    /// ## `resolution_x`
    /// the horizontal resolution in dpi
    /// ## `resolution_y`
    /// the vertical resolution in dpi
    #[doc(alias = "gtk_print_settings_set_resolution_xy")]
    pub fn set_resolution_xy(&self, resolution_x: i32, resolution_y: i32) {
        unsafe {
            ffi::gtk_print_settings_set_resolution_xy(
                self.to_glib_none().0,
                resolution_x,
                resolution_y,
            );
        }
    }

    /// Sets the value of [`PRINT_SETTINGS_REVERSE`][crate::PRINT_SETTINGS_REVERSE].
    /// ## `reverse`
    /// whether to reverse the output
    #[doc(alias = "gtk_print_settings_set_reverse")]
    pub fn set_reverse(&self, reverse: bool) {
        unsafe {
            ffi::gtk_print_settings_set_reverse(self.to_glib_none().0, reverse.into_glib());
        }
    }

    /// Sets the value of [`PRINT_SETTINGS_SCALE`][crate::PRINT_SETTINGS_SCALE].
    /// ## `scale`
    /// the scale in percent
    #[doc(alias = "gtk_print_settings_set_scale")]
    pub fn set_scale(&self, scale: f64) {
        unsafe {
            ffi::gtk_print_settings_set_scale(self.to_glib_none().0, scale);
        }
    }

    /// Sets the value of [`PRINT_SETTINGS_USE_COLOR`][crate::PRINT_SETTINGS_USE_COLOR].
    /// ## `use_color`
    /// whether to use color
    #[doc(alias = "gtk_print_settings_set_use_color")]
    pub fn set_use_color(&self, use_color: bool) {
        unsafe {
            ffi::gtk_print_settings_set_use_color(self.to_glib_none().0, use_color.into_glib());
        }
    }

    /// This function saves the print settings from @self to @file_name.
    ///
    /// If the file could not be written then error is set to either a
    /// `GFileError` or `GKeyFileError`.
    /// ## `file_name`
    /// the file to save to
    ///
    /// # Returns
    ///
    /// [`true`] on success
    #[doc(alias = "gtk_print_settings_to_file")]
    pub fn to_file(&self, file_name: impl AsRef<std::path::Path>) -> Result<(), glib::Error> {
        unsafe {
            let mut error = std::ptr::null_mut();
            let is_ok = ffi::gtk_print_settings_to_file(
                self.to_glib_none().0,
                file_name.as_ref().to_glib_none().0,
                &mut error,
            );
            debug_assert_eq!(is_ok == glib::ffi::GFALSE, !error.is_null());
            if error.is_null() {
                Ok(())
            } else {
                Err(from_glib_full(error))
            }
        }
    }

    /// Serialize print settings to an a{sv} variant.
    ///
    /// # Returns
    ///
    /// a new, floating, `GVariant`
    #[doc(alias = "gtk_print_settings_to_gvariant")]
    pub fn to_gvariant(&self) -> glib::Variant {
        unsafe { from_glib_none(ffi::gtk_print_settings_to_gvariant(self.to_glib_none().0)) }
    }

    /// This function adds the print settings from @self to @key_file.
    /// ## `key_file`
    /// the `GKeyFile` to save the print settings to
    /// ## `group_name`
    /// Print Settings
    #[doc(alias = "gtk_print_settings_to_key_file")]
    pub fn to_key_file(&self, key_file: &glib::KeyFile, group_name: Option<&str>) {
        unsafe {
            ffi::gtk_print_settings_to_key_file(
                self.to_glib_none().0,
                key_file.to_glib_none().0,
                group_name.to_glib_none().0,
            );
        }
    }

    /// Removes any value associated with @key.
    ///
    /// This has the same effect as setting the value to [`None`].
    /// ## `key`
    /// a key
    #[doc(alias = "gtk_print_settings_unset")]
    pub fn unset(&self, key: &str) {
        unsafe {
            ffi::gtk_print_settings_unset(self.to_glib_none().0, key.to_glib_none().0);
        }
    }
}

impl Default for PrintSettings {
    fn default() -> Self {
        Self::new()
    }
}