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// 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::Range; use glib::object::Cast; use glib::object::IsA; use glib::signal::connect_raw; use glib::signal::SignalHandlerId; use glib::translate::*; use std::boxed::Box as Box_; use std::fmt; use std::mem; use std::mem::transmute; use std::ptr; glib::wrapper! { /// [`Value`][crate::Value] should be implemented for components which either display /// a value from a bounded range, or which allow the user to specify a /// value from a bounded range, or both. For instance, most sliders and /// range controls, as well as dials, should have [`Object`][crate::Object] /// representations which implement [`Value`][crate::Value] on the component's /// behalf. `AtKValues` may be read-only, in which case attempts to /// alter the value return would fail. /// /// <refsect1 id="current-value-text"> /// `<title>`On the subject of current value text`</title>` /// `<para>` /// In addition to providing the current value, implementors can /// optionally provide an end-user-consumable textual description /// associated with this value. This description should be included /// when the numeric value fails to convey the full, on-screen /// representation seen by users. /// `</para>` /// /// `<example>` /// `<title>`Password strength`</title>` /// A password strength meter whose value changes as the user types /// their new password. Red is used for values less than 4.0, yellow /// for values between 4.0 and 7.0, and green for values greater than /// 7.0. In this instance, value text should be provided by the /// implementor. Appropriate value text would be "weak", "acceptable," /// and "strong" respectively. /// `</example>` /// /// A level bar whose value changes to reflect the battery charge. The /// color remains the same regardless of the charge and there is no /// on-screen text reflecting the fullness of the battery. In this /// case, because the position within the bar is the only indication /// the user has of the current charge, value text should not be /// provided by the implementor. /// /// <refsect2 id="implementor-notes"> /// `<title>`Implementor Notes`</title>` /// `<para>` /// Implementors should bear in mind that assistive technologies will /// likely prefer the value text provided over the numeric value when /// presenting a widget's value. As a result, strings not intended for /// end users should not be exposed in the value text, and strings /// which are exposed should be localized. In the case of widgets which /// display value text on screen, for instance through a separate label /// in close proximity to the value-displaying widget, it is still /// expected that implementors will expose the value text using the /// above API. /// `</para>` /// /// `<para>` /// [`Value`][crate::Value] should NOT be implemented for widgets whose displayed /// value is not reflective of a meaningful amount. For instance, a /// progress pulse indicator whose value alternates between 0.0 and 1.0 /// to indicate that some process is still taking place should not /// implement [`Value`][crate::Value] because the current value does not reflect /// progress towards completion. /// `</para>` /// `</refsect2>` /// `</refsect1>` /// /// <refsect1 id="ranges"> /// `<title>`On the subject of ranges`</title>` /// `<para>` /// In addition to providing the minimum and maximum values, /// implementors can optionally provide details about subranges /// associated with the widget. These details should be provided by the /// implementor when both of the following are communicated visually to /// the end user: /// `</para>` /// `<itemizedlist>` /// `<listitem>`The existence of distinct ranges such as "weak", /// "acceptable", and "strong" indicated by color, bar tick marks, /// and/or on-screen text.`</listitem>` /// `<listitem>`Where the current value stands within a given subrange, /// for instance illustrating progression from very "weak" towards /// nearly "acceptable" through changes in shade and/or position on /// the bar within the "weak" subrange.`</listitem>` /// `</itemizedlist>` /// `<para>` /// If both of the above do not apply to the widget, it should be /// sufficient to expose the numeric value, along with the value text /// if appropriate, to make the widget accessible. /// `</para>` /// /// <refsect2 id="ranges-implementor-notes"> /// `<title>`Implementor Notes`</title>` /// `<para>` /// If providing subrange details is deemed necessary, all possible /// values of the widget are expected to fall within one of the /// subranges defined by the implementor. /// `</para>` /// `</refsect2>` /// `</refsect1>` /// /// <refsect1 id="localization"> /// `<title>`On the subject of localization of end-user-consumable text /// values`</title>` /// `<para>` /// Because value text and subrange descriptors are human-consumable, /// implementors are expected to provide localized strings which can be /// directly presented to end users via their assistive technology. In /// order to simplify this for implementors, implementors can use /// [`ValueType::localized_name()`][crate::ValueType::localized_name()] with the following /// already-localized constants for commonly-needed values can be used: /// `</para>` /// /// `<itemizedlist>` /// `<listitem>`ATK_VALUE_VERY_WEAK`</listitem>` /// `<listitem>`ATK_VALUE_WEAK`</listitem>` /// `<listitem>`ATK_VALUE_ACCEPTABLE`</listitem>` /// `<listitem>`ATK_VALUE_STRONG`</listitem>` /// `<listitem>`ATK_VALUE_VERY_STRONG`</listitem>` /// `<listitem>`ATK_VALUE_VERY_LOW`</listitem>` /// `<listitem>`ATK_VALUE_LOW`</listitem>` /// `<listitem>`ATK_VALUE_MEDIUM`</listitem>` /// `<listitem>`ATK_VALUE_HIGH`</listitem>` /// `<listitem>`ATK_VALUE_VERY_HIGH`</listitem>` /// `<listitem>`ATK_VALUE_VERY_BAD`</listitem>` /// `<listitem>`ATK_VALUE_BAD`</listitem>` /// `<listitem>`ATK_VALUE_GOOD`</listitem>` /// `<listitem>`ATK_VALUE_VERY_GOOD`</listitem>` /// `<listitem>`ATK_VALUE_BEST`</listitem>` /// `<listitem>`ATK_VALUE_SUBSUBOPTIMAL`</listitem>` /// `<listitem>`ATK_VALUE_SUBOPTIMAL`</listitem>` /// `<listitem>`ATK_VALUE_OPTIMAL`</listitem>` /// `</itemizedlist>` /// `<para>` /// Proposals for additional constants, along with their use cases, /// should be submitted to the GNOME Accessibility Team. /// `</para>` /// `</refsect1>` /// /// <refsect1 id="changes"> /// `<title>`On the subject of changes`</title>` /// `<para>` /// Note that if there is a textual description associated with the new /// numeric value, that description should be included regardless of /// whether or not it has also changed. /// `</para>` /// `</refsect1>` /// /// # Implements /// /// [`ValueExt`][trait@crate::prelude::ValueExt] #[doc(alias = "AtkValue")] pub struct Value(Interface<ffi::AtkValue, ffi::AtkValueIface>); match fn { type_ => || ffi::atk_value_get_type(), } } pub const NONE_VALUE: Option<&Value> = None; /// Trait containing all [`struct@Value`] methods. /// /// # Implementors /// /// [`NoOpObject`][struct@crate::NoOpObject], [`Value`][struct@crate::Value] pub trait ValueExt: 'static { /// Gets the value of this object. /// /// # Deprecated /// /// Since 2.12. Use [`value_and_text()`][Self::value_and_text()] /// instead. /// /// # Returns /// /// /// ## `value` /// a [`glib::Value`][crate::glib::Value] representing the current accessible value #[doc(alias = "atk_value_get_current_value")] #[doc(alias = "get_current_value")] fn current_value(&self) -> glib::Value; /// Gets the minimum increment by which the value of this object may be /// changed. If zero, the minimum increment is undefined, which may /// mean that it is limited only by the floating point precision of the /// platform. /// /// # Returns /// /// the minimum increment by which the value of this /// object may be changed. zero if undefined. #[doc(alias = "atk_value_get_increment")] #[doc(alias = "get_increment")] fn increment(&self) -> f64; /// Gets the maximum value of this object. /// /// # Deprecated /// /// Since 2.12. Use [`range()`][Self::range()] instead. /// /// # Returns /// /// /// ## `value` /// a [`glib::Value`][crate::glib::Value] representing the maximum accessible value #[doc(alias = "atk_value_get_maximum_value")] #[doc(alias = "get_maximum_value")] fn maximum_value(&self) -> glib::Value; /// Gets the minimum increment by which the value of this object may be changed. If zero, /// the minimum increment is undefined, which may mean that it is limited only by the /// floating point precision of the platform. /// /// # Deprecated /// /// Since 2.12. Use [`increment()`][Self::increment()] instead. /// /// # Returns /// /// /// ## `value` /// a [`glib::Value`][crate::glib::Value] representing the minimum increment by which the accessible value may be changed #[doc(alias = "atk_value_get_minimum_increment")] #[doc(alias = "get_minimum_increment")] fn minimum_increment(&self) -> glib::Value; /// Gets the minimum value of this object. /// /// # Deprecated /// /// Since 2.12. Use [`range()`][Self::range()] instead. /// /// # Returns /// /// /// ## `value` /// a [`glib::Value`][crate::glib::Value] representing the minimum accessible value #[doc(alias = "atk_value_get_minimum_value")] #[doc(alias = "get_minimum_value")] fn minimum_value(&self) -> glib::Value; /// Gets the range of this object. /// /// # Returns /// /// a newly allocated [`Range`][crate::Range] /// that represents the minimum, maximum and descriptor (if available) /// of `self`. NULL if that range is not defined. #[doc(alias = "atk_value_get_range")] #[doc(alias = "get_range")] fn range(&self) -> Option<Range>; /// Gets the list of subranges defined for this object. See [`Value`][crate::Value] /// introduction for examples of subranges and when to expose them. /// /// # Returns /// /// an `GSList` of /// [`Range`][crate::Range] which each of the subranges defined for this object. Free /// the returns list with `g_slist_free()`. #[doc(alias = "atk_value_get_sub_ranges")] #[doc(alias = "get_sub_ranges")] fn sub_ranges(&self) -> Vec<Range>; /// Gets the current value and the human readable text alternative of /// `self`. `text` is a newly created string, that must be freed by the /// caller. Can be NULL if no descriptor is available. /// /// # Returns /// /// /// ## `value` /// address of `gdouble` to put the current value of `self` /// /// ## `text` /// address of `gchar` to put the human /// readable text alternative for `value` #[doc(alias = "atk_value_get_value_and_text")] #[doc(alias = "get_value_and_text")] fn value_and_text(&self) -> (f64, glib::GString); /// Sets the value of this object. /// /// # Deprecated /// /// Since 2.12. Use [`set_value()`][Self::set_value()] instead. /// ## `value` /// a [`glib::Value`][crate::glib::Value] which is the desired new accessible value. /// /// # Returns /// /// [`true`] if new value is successfully set, [`false`] otherwise. #[doc(alias = "atk_value_set_current_value")] fn set_current_value(&self, value: &glib::Value) -> bool; /// Sets the value of this object. /// /// This method is intended to provide a way to change the value of the /// object. In any case, it is possible that the value can't be /// modified (ie: a read-only component). If the value changes due this /// call, it is possible that the text could change, and will trigger /// an `signal::Value::value-changed` signal emission. /// /// Note for implementors: the deprecated [`set_current_value()`][Self::set_current_value()] /// method returned TRUE or FALSE depending if the value was assigned /// or not. In the practice several implementors were not able to /// decide it, and returned TRUE in any case. For that reason it is not /// required anymore to return if the value was properly assigned or /// not. /// ## `new_value` /// a double which is the desired new accessible value. #[doc(alias = "atk_value_set_value")] fn set_value(&self, new_value: f64); /// The 'value-changed' signal is emitted when the current value /// that represent the object changes. `value` is the numerical /// representation of this new value. `text` is the human /// readable text alternative of `value`, and can be NULL if it is /// not available. Note that if there is a textual description /// associated with the new numeric value, that description /// should be included regardless of whether or not it has also /// changed. /// /// Example: a password meter whose value changes as the user /// types their new password. Appropiate value text would be /// "weak", "acceptable" and "strong". /// ## `value` /// the new value in a numerical form. /// ## `text` /// human readable text alternative (also called /// description) of this object. NULL if not available. #[doc(alias = "value-changed")] fn connect_value_changed<F: Fn(&Self, f64, &str) + 'static>(&self, f: F) -> SignalHandlerId; } impl<O: IsA<Value>> ValueExt for O { fn current_value(&self) -> glib::Value { unsafe { let mut value = glib::Value::uninitialized(); ffi::atk_value_get_current_value( self.as_ref().to_glib_none().0, value.to_glib_none_mut().0, ); value } } fn increment(&self) -> f64 { unsafe { ffi::atk_value_get_increment(self.as_ref().to_glib_none().0) } } fn maximum_value(&self) -> glib::Value { unsafe { let mut value = glib::Value::uninitialized(); ffi::atk_value_get_maximum_value( self.as_ref().to_glib_none().0, value.to_glib_none_mut().0, ); value } } fn minimum_increment(&self) -> glib::Value { unsafe { let mut value = glib::Value::uninitialized(); ffi::atk_value_get_minimum_increment( self.as_ref().to_glib_none().0, value.to_glib_none_mut().0, ); value } } fn minimum_value(&self) -> glib::Value { unsafe { let mut value = glib::Value::uninitialized(); ffi::atk_value_get_minimum_value( self.as_ref().to_glib_none().0, value.to_glib_none_mut().0, ); value } } fn range(&self) -> Option<Range> { unsafe { from_glib_full(ffi::atk_value_get_range(self.as_ref().to_glib_none().0)) } } fn sub_ranges(&self) -> Vec<Range> { unsafe { FromGlibPtrContainer::from_glib_full(ffi::atk_value_get_sub_ranges( self.as_ref().to_glib_none().0, )) } } fn value_and_text(&self) -> (f64, glib::GString) { unsafe { let mut value = mem::MaybeUninit::uninit(); let mut text = ptr::null_mut(); ffi::atk_value_get_value_and_text( self.as_ref().to_glib_none().0, value.as_mut_ptr(), &mut text, ); let value = value.assume_init(); (value, from_glib_full(text)) } } fn set_current_value(&self, value: &glib::Value) -> bool { unsafe { from_glib(ffi::atk_value_set_current_value( self.as_ref().to_glib_none().0, value.to_glib_none().0, )) } } fn set_value(&self, new_value: f64) { unsafe { ffi::atk_value_set_value(self.as_ref().to_glib_none().0, new_value); } } fn connect_value_changed<F: Fn(&Self, f64, &str) + 'static>(&self, f: F) -> SignalHandlerId { unsafe extern "C" fn value_changed_trampoline< P: IsA<Value>, F: Fn(&P, f64, &str) + 'static, >( this: *mut ffi::AtkValue, value: libc::c_double, text: *mut libc::c_char, f: glib::ffi::gpointer, ) { let f: &F = &*(f as *const F); f( Value::from_glib_borrow(this).unsafe_cast_ref(), value, &glib::GString::from_glib_borrow(text), ) } unsafe { let f: Box_<F> = Box_::new(f); connect_raw( self.as_ptr() as *mut _, b"value-changed\0".as_ptr() as *const _, Some(transmute::<_, unsafe extern "C" fn()>( value_changed_trampoline::<Self, F> as *const (), )), Box_::into_raw(f), ) } } } impl fmt::Display for Value { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { f.write_str("Value") } }