Struct yew_styles::forms::form_textarea::FormTextArea

pub struct FormTextArea { /* fields omitted */ }

Form Textearea

Example

use yew::prelude::*;
use yew_styles::forms::form_textarea::FormTextArea;
use yew_styles::styles::{Palette, Size};

pub struct FormTextAreaExample {
    pub link: ComponentLink<Self>,
    pub value: String,
}

pub enum Msg {
    Input(String),
}

impl Component for FormTextAreaExample {
    type Message = Msg;
    type Properties = ();
    fn create(_: Self::Properties, link: ComponentLink<Self>) -> Self {
        FormTextAreaExample {
            link,
            value: "".to_string(),
        }
    }
    fn update(&mut self, msg: Self::Message) -> ShouldRender {
        match msg {
            Msg::Input(value) => {
                self.value = value;
            }
        }
        true
    }
    fn change(&mut self, _props: Self::Properties) -> ShouldRender {
        false
    }

    fn view(&self) -> Html {
        html!{
            <FormTextArea placeholder="write here"
                value=form_page.value.clone()
                textarea_size=Size::Small
                textarea_style=Palette::Info
                oninput_signal=form_page.link.callback(|e: InputData| Msg::Input(e.value))
            />
        }
    }

Trait Implementations

impl Component for FormTextArea

type Message = Msg

Messages are used to make Components dynamic and interactive. Simple Component's can declare their Message type to be (). Complex Component's commonly use an enum to declare multiple Message types.

type Properties = Props

Properties are the inputs to a Component and should not mutated within a Component. They are passed to a Component using a JSX-style syntax. # use yew::{Html, Component, Properties, ComponentLink, html}; # struct Model; # #[derive(Clone, Properties)] # struct Props { # prop: String, # } # impl Component for Model { # type Message = ();type Properties = Props; # fn create(props: Self::Properties,link: ComponentLink<Self>) -> Self {unimplemented!()} # fn update(&mut self,msg: Self::Message) -> bool {unimplemented!()} # fn change(&mut self, _: Self::Properties) -> bool {unimplemented!()} # fn view(&self) -> Html { html! { <Model prop="value" /> } # }}

fn create(props: Self::Properties, link: ComponentLink<Self>) -> Self

Components are created with their properties as well as a ComponentLink which can be used to send messages and create callbacks for triggering updates.

fn update(&mut self, msg: Self::Message) -> ShouldRender

Components handle messages in their update method and commonly use this method to update their state and (optionally) re-render themselves.

fn change(&mut self, props: Self::Properties) -> ShouldRender

When the parent of a Component is re-rendered, it will either be re-created or receive new properties in the change lifecycle method. Component's can choose to re-render if the new properties are different than the previously received properties. Most Component's will use props with a PartialEq impl and will be implemented like this: # use yew::{Html, Component, ComponentLink, html, ShouldRender}; # struct Model{props: ()}; # impl Component for Model { # type Message = ();type Properties = (); # fn create(props: Self::Properties,link: ComponentLink<Self>) -> Self {unimplemented!()} # fn update(&mut self,msg: Self::Message) -> bool {unimplemented!()} # fn view(&self) -> Html {unimplemented!()} fn change(&mut self, props: Self::Properties) -> ShouldRender { if self.props != props { self.props = props; true } else { false } } # } Components which don't have properties should always return false.

fn view(&self) -> Html

Components define their visual layout using a JSX-style syntax through the use of the html! procedural macro. The full guide to using the macro can be found in Yew's documentation.

fn rendered(&mut self, _first_render: bool)

The rendered method is called after each time a Component is rendered but before the browser updates the page. ## Examples ```rust # use yew::{Html, Component, ComponentLink, html, ShouldRender}; # struct Model{props: ()}; # impl Model { fn setup_element(&self) { } } # impl Component for Model { # type Message = ();type Properties = (); # fn create(props: Self::Properties,link: ComponentLink) -> Self {unimplemented!()} # fn update(&mut self,msg: Self::Message) -> bool {unimplemented!()} # fn view(&self) -> Html {unimplemented!()} # fn change(&mut self, _props: Self::Properties) -> ShouldRender { unimplemented!() } fn rendered(&mut self, first_render: bool) { if first_render { self.setup_element(); // Similar to 'mounted' in other frameworks } } # }

fn destroy(&mut self)

The destroy method is called right before a Component is unmounted.