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////////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2018, the Perspective Authors.
//
// This file is part of the Perspective library, distributed under the terms
// of the Apache License 2.0. The full license can be found in the LICENSE
// file.
use web_sys::*;
use yew::prelude::*;
use super::modal::*;
use super::InPlaceColumn;
use crate::utils::WeakScope;
use crate::*;
static CSS: &str = include_str!("../../../target/css/column-dropdown.css");
pub enum ColumnDropDownMsg {
SetValues(Vec<InPlaceColumn>, f64),
SetCallback(Callback<InPlaceColumn>),
ItemDown,
ItemUp,
ItemSelect,
}
pub struct ColumnDropDown {
values: Option<Vec<InPlaceColumn>>,
selected: usize,
width: f64,
on_select: Option<Callback<InPlaceColumn>>,
}
#[derive(Properties, PartialEq)]
pub struct ColumnDropDownProps {
#[prop_or_default]
pub weak_link: WeakScope<ColumnDropDown>,
}
impl ModalLink<ColumnDropDown> for ColumnDropDownProps {
fn weak_link(&self) -> &'_ WeakScope<ColumnDropDown> {
&self.weak_link
}
}
impl Component for ColumnDropDown {
type Message = ColumnDropDownMsg;
type Properties = ColumnDropDownProps;
fn create(ctx: &Context<Self>) -> Self {
ctx.set_modal_link();
Self {
values: Some(vec![]),
selected: 0,
width: 0.0,
on_select: None,
}
}
fn update(&mut self, _ctx: &Context<Self>, msg: Self::Message) -> bool {
match msg {
ColumnDropDownMsg::SetCallback(callback) => {
self.on_select = Some(callback);
false
}
ColumnDropDownMsg::SetValues(values, width) => {
self.values = Some(values);
self.selected = 0;
self.width = width;
true
}
ColumnDropDownMsg::ItemSelect => {
if let Some(ref values) = self.values {
match values.get(self.selected) {
None => {
console::error_1(&"Selected out-of-bounds".into());
false
}
Some(x) => {
self.on_select.as_ref().unwrap().emit(x.clone());
false
}
}
} else {
console::error_1(&"No Values".into());
false
}
}
ColumnDropDownMsg::ItemDown => {
self.selected += 1;
if let Some(ref values) = self.values {
if self.selected >= values.len() {
self.selected = 0;
};
};
true
}
ColumnDropDownMsg::ItemUp => {
if let Some(ref values) = self.values {
if self.selected < 1 {
self.selected = values.len();
}
}
self.selected -= 1;
true
}
}
}
fn changed(&mut self, _ctx: &Context<Self>, _old: &Self::Properties) -> bool {
false
}
fn view(&self, _ctx: &Context<Self>) -> Html {
let body = html! {
if let Some(ref values) = self.values {
if !values.is_empty() {
{
for values
.iter()
.enumerate()
.map(|(idx, value)| {
let click = self.on_select.as_ref().unwrap().reform({
let value = value.clone();
move |_: MouseEvent| value.clone()
});
let row = match value {
InPlaceColumn::Column(col) => html! {
<span>{ col }</span>
},
InPlaceColumn::Expression(col) => html! {
<span id="add-expression">{ col }</span>
},
};
html! {
if idx == self.selected {
<span onmousedown={ click } class="selected">{ row }</span>
} else {
<span onmousedown={ click }>{ row }</span>
}
}
})
}
} else {
<span class="no-results">{ "Invalid Column" }</span>
}
}
};
let position = format!(
":host{{min-width:{}px;max-width:{}px}}",
self.width, self.width
);
html_template! {
<style>
{ &CSS }
</style>
<style>
{ position }
</style>
{ body }
}
}
}