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virtual_view_dom
a virtual view transaction renderer for the dom
Build Examples
$ cargo install -f cargo-web
$ make
Counter Example
extern crate serde_json;
extern crate stdweb;
#[macro_use]
extern crate virtual_view;
extern crate virtual_view_dom;
use stdweb::web::{document, IEventTarget};
use virtual_view::{Children, Component, Event, Instance, EventManager, Props, Renderer, Updater, View};
use virtual_view_dom::{Handler, Patcher, TransactionEvent};
struct Button;
impl Component for Button {
fn render(&self, _: &Instance, props: &Props, children: &Children) -> View {
view! {
<button class="Button" ... { props }>{ each children }</button>
}
}
}
struct Counter;
impl Counter {
fn on_add_count(updater: &Updater, _: &mut Event) {
updater.update(|current| {
let mut next = current.clone();
next.update("count", |count| {
if let Some(c) = count.number() {
*count = (c + 1.0).into();
}
});
next
});
}
fn on_sub_count(updater: &Updater, _: &mut Event) {
updater.update(|current| {
let mut next = current.clone();
next.update("count", |count| {
if let Some(c) = count.number() {
*count = (c - 1.0).into();
}
});
next
});
}
}
impl Component for App {
#[inline]
fn name(&self) -> &'static str {
"App"
}
#[inline]
fn initial_state(&self, props: &Props) -> Props {
props! {
"count": props.take("count").unwrap_or(0.into())
}
}
#[inline]
fn render(&self, instance: &Instance, _: &Props, _: &Children) -> View {
let count = instance.state.get("count");
view! {
<div class="Counter">
<p>{format!("Count {}", count)}</p>
<{Button} onclick={ instance.wrap(App::on_add_count) }>
{"Add"}
</{Button}>
<{Button} onclick={ instance.wrap(App::on_sub_count) }>
{"Sub"}
</{Button}>
</div>
}
}
}
fn main() {
stdweb::initialize();
let event_manager = EventManager::new();
let handler = Handler::new(document());
let mut patcher = Patcher::new(
document().get_element_by_id("app").unwrap().into(),
document(),
event_manager.clone(),
);
document().add_event_listener::<TransactionEvent, _>(move |e| {
patcher.patch(&e.transaction());
});
let _renderer = Renderer::new(
view! {
<{Counter} count=0/>
},
event_manager,
handler,
);
stdweb::event_loop();
}