Struct android_activity::input::KeyCharacterMap

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pub struct KeyCharacterMap { /* private fields */ }
Expand description

Describes the keys provided by a keyboard device and their associated labels.

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impl KeyCharacterMap

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pub fn get( &self, key_code: Keycode, meta_state: MetaState ) -> Result<KeyMapChar, AppError>

Gets the Unicode character generated by the specified Keycode and MetaState combination.

Returns KeyMapChar::None if the key is not one that is used to type Unicode characters.

Returns KeyMapChar::CombiningAccent if the key is a “dead key” that should be combined with another to actually produce a character – see KeyCharacterMap::get_dead_char.

§Errors

Since this API needs to use JNI internally to call into the Android JVM it may return a AppError::JavaError in case there is a spurious JNI error or an exception is caught.

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pub fn get_dead_char( &self, accent_char: char, base_char: char ) -> Result<Option<char>, AppError>

Get the character that is produced by combining the dead key producing accent with the key producing character c.

For example, get_dead_char('`', 'e') returns ‘è’. get_dead_char('^', ' ') returns ‘^’ and get_dead_char('^', '^') returns ‘^’.

§Errors

Since this API needs to use JNI internally to call into the Android JVM it may return a AppError::JavaError in case there is a spurious JNI error or an exception is caught.

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pub fn get_keyboard_type(&self) -> Result<KeyboardType, AppError>

Gets the keyboard type.

Different keyboard types have different semantics. See KeyboardType for details.

§Errors

Since this API needs to use JNI internally to call into the Android JVM it may return a AppError::JavaError in case there is a spurious JNI error or an exception is caught.

Trait Implementations§

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impl Clone for KeyCharacterMap

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fn clone(&self) -> KeyCharacterMap

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for KeyCharacterMap

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.