Trait cacao::input::TextFieldDelegate

source · [−]

pub trait TextFieldDelegate {
    const NAME: &'static str;

    fn subclass_name(&self) -> &'static str { ... }
    fn did_load(&mut self, view: TextField) { ... }
    fn text_did_end_editing(&self, value: &str) { ... }
    fn text_should_begin_editing(&self, value: &str) -> bool { ... }
    fn text_did_begin_editing(&self, value: &str) { ... }
    fn text_did_change(&self, value: &str) { ... }
    fn text_should_end_editing(&self, value: &str) -> bool { ... }
}

Expand description

This trait can be used for implementing custom text field behavior.

Required Associated Constants

const NAME: &'static str

Used to cache subclass creations on the Objective-C side. You can just set this to be the name of your view type. This value must be unique per-type.

Provided Methods

fn subclass_name(&self) -> &'static str

You should rarely (read: probably never) need to implement this yourself. It simply acts as a getter for the associated NAME const on this trait.

fn did_load(&mut self, view: TextField)

Called when the text field is loaded. You’re passed a reference to the underlying text field for future local use.

fn text_did_end_editing(&self, value: &str)

Posts a notification when the text is no longer in edit mode.

fn text_should_begin_editing(&self, value: &str) -> bool

Requests permission to begin editing a text object.

fn text_did_begin_editing(&self, value: &str)

Posts a notification to the default notification center that the text is about to go into edit mode.

fn text_did_change(&self, value: &str)

Posts a notification when the text changes, and forwards the message to the text field’s cell if it responds.

fn text_should_end_editing(&self, value: &str) -> bool

Performs validation on the text field’s new value.

Implementors