perspective 2.0.0

A data visualization and analytics component, especially well-suited for large and/or streaming datasets.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107

////////////////////////////////////////////////////////////////////////////////
//
// 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 std::marker::PhantomData;
use std::rc::Rc;

use web_sys::*;
use yew::prelude::*;

use super::select::SelectItem;
use crate::components::style::LocalStyle;
use crate::*;

pub type DropDownMenuItem<T> = SelectItem<T>;

pub type DropDownMenuMsg = ();

#[derive(Properties, PartialEq)]
pub struct DropDownMenuProps<T>
where
    T: Into<Html> + Clone + PartialEq + 'static,
{
    pub values: Rc<Vec<DropDownMenuItem<T>>>,
    pub callback: Callback<T>,
}

pub struct DropDownMenu<T>
where
    T: Into<Html> + Clone + PartialEq + 'static,
{
    _props: PhantomData<T>,
}

impl<T> Component for DropDownMenu<T>
where
    T: Into<Html> + Clone + PartialEq + 'static,
{
    type Message = DropDownMenuMsg;
    type Properties = DropDownMenuProps<T>;

    fn create(_ctx: &Context<Self>) -> Self {
        Self {
            _props: Default::default(),
        }
    }

    fn update(&mut self, _ctx: &Context<Self>, _msg: Self::Message) -> bool {
        false
    }

    fn view(&self, ctx: &Context<Self>) -> Html {
        let values = &ctx.props().values;
        let body = if !values.is_empty() {
            values
                .iter()
                .map(|value| match value {
                    DropDownMenuItem::Option(x) => {
                        let click = ctx.props().callback.reform({
                            let value = x.clone();
                            move |_: MouseEvent| value.clone()
                        });

                        html! {
                            <span onmousedown={ click }class="selected">
                                { x.clone().into() }
                            </span>
                        }
                    }
                    DropDownMenuItem::OptGroup(name, xs) => {
                        html_template! {
                            <span class="dropdown-group-label">{ name }</span>
                            <div class="dropdown-group-container">
                                {
                                    xs.iter().map(|x| {
                                        let click = ctx.props().callback.reform({
                                            let value = x.clone();
                                            move |_: MouseEvent| value.clone()
                                        });
                                        html! {
                                            <span onmousedown={ click }>
                                                { x.clone().into() }
                                            </span>
                                        }
                                    }).collect::<Html>()
                                }
                            </div>
                        }
                    }
                })
                .collect::<Html>()
        } else {
            html! {
                <span class="no-results">{ "No Completions" }</span>
            }
        };

        html_template! {
            <LocalStyle href={ css!("containers/dropdown-menu") } />
            { body }
        }
    }
}