Parliament chart
Updated 6 years ago to v3.0.0 by Flourish team
How to use this template
This template is ideal for showing the number of parliament seats owned by each party. It provides you with the ability to examine the difference in seats held between two elections, with an option to have a nice animation when displaying the change. The chart is accompanied by a table and a legend, both of which are optional. The table provides a summary of the seat change between the two elections. The legend on default is turned off, but can be added, and has a mouseover effect when hovering over one of the party names. The chart will also flip vertically on mobile.
Data requirements
You must have at least two columns. One with the party name, and another with the total number of seats for the current election. There is also an optional column which can represent the previous election.
Tips
You can adjust the number of seats in the parliament chart to your liking. By default, the number of seats is at 650, but you can change it to 435 seats, for example, if you're making a chart about US parliament seating.
Tweak the colours with the Automatic colour scheme, or change the colour for one party, or all the parties with the Custom party colours.
You can add/remove the table, the legend, the buttons, the animation.
Credits
Created by the Flourish team. Want to see additional features? Let us know at support@flourish.studio.
API information
This section documents API usage specific to this template, so for an introduction we suggest you refer to the generic API documentation instead.
template: @flourish/parliament-chart
version: 3
Template data
There are three different formats in which you can supply data to this template. The most convenient for you to use likely depends on the source of your data, as described below.
1. Array of arrays, and a bindings object
You can supply arrays of arrays to opts.data, which might look
like:
{
data: {
data: [
[ "DataColumn1Value1", "DataColumn2Value1",
[ "DataColumn1Value2", "DataColumn2Value2",
[ "DataColumn1Value3", "DataColumn2Value3",
...
]
}
}
where each array of arrays represents the rows in a data sheet.
To tell the API how the values from each column should be
associated with the keys that the template is expecting, you must also supply
an object attached to opts.bindings. (The meanings of the
keys in the bindings object are documented
below.) The minimal bindings you can
supply for this template are as shown in this example:
{
template: "@flourish/parliament-chart",
version: "3",
bindings: {
data: {
party: 0, // index of a column in your data
}
},
data: {
data: [
[ "DataColumn1Value1", "DataColumn2Value1",
[ "DataColumn1Value2", "DataColumn2Value2",
[ "DataColumn1Value3", "DataColumn2Value3",
...
]
}
}
All possible bindings that you can supply are shown in this example:
{
template: "@flourish/parliament-chart",
version: "3",
bindings: {
data: {
party: 0, // index of a column in your data
seats: [1, 2, ...], // index(es) of column(s) in your data
}
},
data: {
data: [
[ "DataColumn1Value1", "DataColumn2Value1",
[ "DataColumn1Value2", "DataColumn2Value2",
[ "DataColumn1Value3", "DataColumn2Value3",
...
]
}
}
2. Array of objects with arbitrary keys, and a bindings object
This format is most likely useful when you have data from an external source,
such as CSV data loaded from d3-dsv.
You should supply this attached to the opts.data, which might look
like:
{
data: [
{ "DataHeader1": ..., "DataHeader2": ..., ... },
{ "DataHeader1": ..., "DataHeader2": ..., ... },
{ "DataHeader1": ..., "DataHeader2": ..., ... },
...
]
}
... but with the keys being the column headers from your
source data instead. You must also supply an object attached to
opts.bindings. The minimal bindings you can
supply for this template are as shown in this example:
{
template: "@flourish/parliament-chart",
version: "3",
bindings: {
data: {
party: "DataHeader1",
}
},
data: {
data: [
{ "DataHeader1": ..., "DataHeader2": ..., ... },
{ "DataHeader1": ..., "DataHeader2": ..., ... },
{ "DataHeader1": ..., "DataHeader2": ..., ... },
...
]
}
}
All possible bindings that you can supply are shown in this example:
{
template: "@flourish/parliament-chart",
version: "3",
bindings: {
data: {
party: "DataHeader1",
seats: ["DataHeader2", "DataHeader3", ...],
}
},
data: {
data: [
{ "DataHeader1": ..., "DataHeader2": ..., ... },
{ "DataHeader1": ..., "DataHeader2": ..., ... },
{ "DataHeader1": ..., "DataHeader2": ..., ... },
...
]
}
}
(As before, the keys containing "Header" would be replaced by column names from your data source.)
3. Array of objects with template-defined keys
There is an alternative format you can use, which is likely to be easier to
use if your data is not from a spreadsheet source. With this alternative format
you supply your data to the template as
an array of objects, attached to opts.data, where the keys must
be those used by the template, as documented below. In this case
there is no need to supply a bindings object, since the key names are already
those expected by the template. The required properties in the data
object are as follows (scroll down for a
description of what each property is):
{
template: "@flourish/parliament-chart",
version: "3",
data: {
data: [
{
party: ...,
seats: [...]
},
...
]
},
...
}
And the full list of all possible properties is as follows:
{
template: "@flourish/parliament-chart",
version: "3",
data: {
data: [
{
party: ...,
seats: [...]
},
...
]
},
...
}
Meanings of the template data keys:
- data.party: party
- data.seats: This should point to the column with election data
Template settings
Options for opts.state.
Parliament layout
num_of_seats number
Number of seats. Min: 1 Max: 40000
hemicycle_arc number
Size of arc. Min: 10 Max: 360
circle_inner number
Inner space. Max: 90
manual_row_count boolean
Number of rows. Allowed values:
num_of_rows number
Rows. Min: 1
Colours
color.palette colors
Palette.
color.extend boolean
Auto-extend. Automatically generate additional colours when needed to avoid the palette colours being used more than once. Added colours are based on the average lightness and chroma values of the palette. This works best if the palette’s colours do not have very high or low saturation.
color.advanced boolean
Fine tune. Fine tune how additional colours are added to the palette.
color.hue_rotation_angle number
Hue rotation for added colours. Angle, in degrees in HCL colourspace, between one generated colour and the next. The default value, ~360/(Golden ratio), ensures adjacent hues are not too similar. Max: 360
color.custom_palette text
Custom overrides. Type the name of the entity whose colour you want to set, a colon and then a colour (using a name, hex-code or rgb declaration). Multiple colours can be set using multiple lines. For example:
Party 1: red
Party 2: #4455AA
Party 3: rgb(30,168,26)
opacity number
Opacity. Max: 1
unassigned_color color
Unassigned.
Legend
show_legend boolean
Show legend.
use_hover_animation boolean
Filter dots when hovering over legend. If unchecked then there will no longer be a hover animation
legend_align string
Align legend. Allowed values:
Table
show_table boolean
Show table.
gain_color color
Gain color.
loss_color color
Loss color.
default_text_color color
Default color.
header_weight string
Header text. Allowed values:
margin_table number
Margin.
show_seat_change string
This adds a new column that shows the change between 2 columns. "Auto" will compare the last 2 columns in your data "Custom" will allow you to handpick 2 columns to compare Allowed values:
seat_change_before string
Seat change before. Add the name of the column you want to compare with
seat_change_after string
Seat change after. Add the name of the column you want to compare with
seat_change_label string
Column name.
seat_format.prefix string
Prefix. Text to place in front of number
seat_format.suffix string
Suffix. Text to place after number
seat_format.n_dec number
Decimal places. Use negative integers to round to positive powers of ten (eg -2 rounds to the nearest 100) Min: -10 Max: 10
seat_format.strip_zeros boolean
Remove trailing zeros.
seat_format.strip_separator boolean
Hide thousands separator below 10,000. Turn off if you want four-digit numbers to include a separator, e.g. “1,234” rather than “1234”.
seat_format.transform_labels boolean
Multiply/divide values.
seat_format.transform string
Allowed values:
- multiply (Multiply by)
- divide (Divide by)
- exponentiate (×10 to the power of)
seat_format.multiply_divide_constant number
seat_format.exponentiate_constant number
Animations
animation_duration number
Animation duration. How long the seats take to "flip" when changing party, in seconds
animation_stagger number
Animation spread. How many seconds to spread the seat animations across
animate_on_load boolean
Animate on load. Whether to animate the seats when the visualisations first loads
Number formatting
localization.input_decimal_separator string
Decimal separator in data sheet. Used for interpreting your data. Only change if data is not displaying on the chart as expected. Allowed values:
localization.output_separators string
Number format to display. How the numbers should appear on chart labels Allowed values:
Page
Layout
layout.body_font font
Font.
layout.max_width number
Maximum width. Leave blank to stretch to container width Min: 50
layout.background_color color
Background.
layout.margin number
Margin.
layout.layout_order string
Layout order. Allowed values:
layout.space_between_sections string
Space between sections. Allowed values:
layout.space_between_sections_custom number
Custom. Max: 100
Header
layout.header_align string
Alignment. Allowed values:
layout.title string
layout.title_styling boolean
Change title styles.
layout.title_size string
Size. Allowed values:
layout.title_size_custom number
Custom. Specify a custom responsive font size. Best results will be with values between 1.2 and 3
layout.title_weight string
Weight. Allowed values:
layout.title_color color
Color.
layout.title_line_height number
Line height. Max: 3
layout.subtitle string
layout.subtitle_styling boolean
Change subtitle styles.
layout.subtitle_size string
Size. Allowed values:
layout.subtitle_size_custom number
Custom. Specify a custom responsive font size. Best results will be with values between 1.2 and 3
layout.subtitle_weight string
Weight. Allowed values:
layout.subtitle_color color
Color.
layout.subtitle_line_height number
Line height. Max: 3
layout.subtitle_space_above string
Space above. Allowed values:
layout.subtitle_space_above_custom number
Custom. Max: 100
layout.text string
layout.text_styling boolean
Change text styles.
layout.text_size string
Size. Allowed values:
layout.text_size_custom number
Custom. Specify a custom responsive font size. Best results will be with values between 1.2 and 3
layout.text_weight string
Weight. Allowed values:
layout.text_color color
Color.
layout.text_line_height number
Line height. Max: 3
layout.text_space_above string
Space above. Allowed values:
layout.text_space_above_custom number
Custom. Max: 100
Footer
layout.source_name string
Source name.
layout.source_url string
Source url.
layout.multiple_sources boolean
Multiple sources.
layout.source_name_2 string
Source name.
layout.source_url_2 string
Source url.
layout.source_name_3 string
Source name.
layout.source_url_3 string
Source url.
layout.source_label string
Source label.
layout.note string
Note.
layout.size number
Size.
layout.color color
Color.
layout.footer_align string
Alignment. Allowed values:
layout.logo_url url
Image.
layout.logo_link_url string
Link.
layout.logo_height number
Height.
layout.logo_margin number
Margin.
layout.logo_order string
Position. Allowed values:
layout.footer_align_vertical string
V. align. Allowed values:
