A data visualisation for the South African elections as a Svelte component. It accepts data as a JSON property from the IEC's NPE Seat Calculation Results API and renders a hemicycle chart.
See the hemicycle with South African national elections data here
npm install svelte-hemicycle<script>
import Hemicycle from 'svelte-hemicycle';
const data = [
{
"id": 1,
"text": "UDFMP",
"count": 160,
"color": "#FF0000"
},
{
"id": 2,
"text": "PDMF",
"count": 150,
"color": "#00FF00"
},
{
"id": 3,
"text": "DA",
"count": 40,
"color": "#0000FF"
},
{
"id": 4,
"text": "PDP",
"count": 30,
"color": "#FFFF00"
},
{
"id": 5,
"text": "APC",
"count": 20,
"color": "#00FFFF"
}
]
const total_seats = 400;
const rows= 12;
</script>
<Hemicycle {data} {total_seats} {rows} />The data to display on the hemicycle. This is an array of objects, each representing a party or group of seats.
Required.
data = [{
"id": 1, // Unique identifier
"text": "UDFMP (60 seats)", // Text to display on the hemicycle
"count": 60, // Number of seats
"color": "#FF0000" // Colour of the hemicycle segment
}]The total number of seats in the legislature. This can be greater than the total number of seats in the data.
Required.
total_seats = 400;The radius of the hemicycle.
Default: 300
r = 300;The number of rows of seats to display.
Default: 12
rows = 12;The size of the dots representing seats.
Default: 5
The angle of the hemicycle, in degrees.
Default: 180 Minimum: 10 Maximum: 360
The padding between the hemicycle and the edge of the SVG.
padding = 30;
padding = [30, 30]; // top, bottom
padding = [30, 30, 30, 30]; // top, right, bottom, leftThe colour of the text and optional markings.
Default: "white"
The font size of the text.
Default: 12
The position of the text.
Defaults to center.
text_position = {
x: 0,
y: 0
}An array of strings representing what to display on the hemicycle.
Defaults to ["points", "text"]
"points" - Display the dots of seats "text" - Display the text on mouseover and click "arc" - Display the arcs of the hemicycle "numbers" - Display the seats in order "voronoi" - Display the voronoi diagram "referencePoints" - Display some reference points
display = ["points", "text"]; // Default
display = ["points", "text", "arc", "numbers", "voronoi", "referencePoints"]; // AllChoose between circle and hexagon.
Default: "circle"
shape = "circle";
shape = "hexagon";The colour of the stroke around the shapes (Currently hexagon only).
default: "#444444"
stroke = "white";The width and height of the SVG.
Default: 600w x 300h
Tip: For 180 degree arcs, you might want to set the height as half the width. For acute or obtuse angles, you might want to tend towards square.
display_width = 600;
display_height = 300;MIT
Copyright 2024 Jason Norwood-Young
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