react-native-slide-charts

react-native-slide-charts uses react-native-svg, d3, and react-native-gesture-handler to create highly customizable interactive charts that animate smoothly via Direct Manipulation.

Check out the demo on expo 📊📈

Features

Bar Chart

Area Chart

Installation

$ npm install react-native-slide-charts --save

or

$ yarn add react-native-slide-charts

Peer Dependencies

Expo

All peerDependencies are included with Expo so installation of peerDependencies isn't required.

React Native

react-native-slide-charts depends on two peer dependencies with native modules that must be installed alongside it. Follow the installation instructions for both iOS and Android both packages.

| Package | Minimum Version | Maximum Version | | ----------------------------------------------------------------------------------------------------- | --------------- | --------------- | | react-native-svg | 7.0.0 | 11.x | | react-native-gesture-handler | 1.1.0 | 1.x |

NOTICE:

Make sure the version of the native module packages chosen works with the react-native version of the project. Manually linking the projects may be required depending on the version and platform.

Usage

react-native-slide-charts exports two types of charts, SlideAreaChart and SlideBarChart along with the type definitions for the Charts, Props, and Enums.

import {
  SlideAreaChart,
  SlideBarChart,
  SlideBarChartProps,
  SlideAreaChartProps,
  YAxisProps,
  XAxisProps,
  XAxisLabelAlignment,
  YAxisLabelAlignment,
  CursorProps,
  ToolTipProps,
  ToolTipTextRenderersInput,
  GradientProps,
} from 'react-native-slide-charts'

To get started you can render an empty chart:

<SlideAreaChart />

But it will be more visually useful for configuring to use some test data.

<SlideBarChart
  data={[
    { x: 0, y: 0 },
    { x: 1, y: 1 },
    { x: 2, y: 2 },
    { x: 3, y: 3 },
    { x: 4, y: 4 },
  ]}
/>

The Props, Types, Enums, and Defaults are defined below:

• Charts
  • Common Props
  • Bar Chart Props
  • Area Chart Props
• Axis
  • Common Props
  • X-Axis Props
  • Y-Axis
• Cursor
  • Cursor Props
• Tool Tip
  • Tool Tip Props
• Types
  • Tool Tip Text Renderers Input
  • Gradient Props
• Enums
  • XAxisLabelAlignment
  • YAxisLabelAlignment
• Gradients
  • Default Area Chart Fill Gradient
  • Default Bar Chart Fill Gradient
  • Default Bar Chart Selected Fill Gradient
  • Default Vertical Line Gradient
  • Default Horizontal Line Gradient

Charts

Common Bar and Area Chart Props:

alwaysShowIndicator

boolean

true

Determines if the indicator for the chart should be visible always or just when being touched.For SlideAreaChart the indicator is the CursorMarker, CursorLine, and ToolTip.For SlideBarChart the indicator is the barSelectedColor or renderSelectedFillGradient and ToolTip.

animated

boolean

true

Animates the charts on mounting and between prop updates.

axisHeight

number

0

Height of the area below the chart for the X-Axis markers and label to render in.

axisWidth

number

0

Width of the area left of the chart for the Y-Axis markers and label to render in.

callbackWithX

(x: number
| Date)
=> void

undefined

Callback function that provides the current Cursor position x. As this is firing off of a continuous animation and not state the usage should match appropriately.e.g. This can be used in conjunction with an array of timed gps points to move an indicator along a path on a map.

callbackWithY

(y: number)
=> void

undefined

Callback function that provides the current Cursor position y. As this is firing off of a continuous animation and not state the usage should match appropriately.e.g. This can be used with direct manipulation on a TextInput to display the current value outside the chart.

chartPaddingTop

number

16

Pushes the rendered height of the data within the chart down to make room for the ToolTip at the max. The ToolTip will render outside of the chart component if desired so this can be set to 0, or adjusted for using paddingTop or style instead if desired.

data

Array<{
  x: number
  | Date,
  y: number
}>

[]

Data that will be displayed on the chart. This must be an array of objects with x and y values with the x increasing from index 0 onward as the chart does not sort the array before use and will render incorrectly otherwise.

fillColor

string

undefined

Color to fill the bars of the bar chart or area of the area chart. Takes precedence over renderFillGradient when applied.

height

number

200

Height of the entire chart component.

onPress

() => void

undefined

If provided the chart will not be interactive and instead can be pressed.

paddingBottom

number

0

Bottom padding as it can not be applied via style to the chart component.

paddingLeft

number

8

Left padding as it can not be applied via style to the chart component.

paddingRight

number

8

Right padding as it can not be applied via style to the chart component.

paddingTop

number

0

Top padding as it can not be applied via style to the chart component.

renderFillGradient

(props:
GradientProps)
=> JSX.Element
| null

Default Area Chart Default Bar Chart

Function that takes GradientProps and returns a custom gradient to fill the bars of the bar chart or area of the area chart.

scrollable

boolean

false

Ensure touch is passed to scrollView on y movement if component is inside scrollView.

shouldCancelWhenOutside

boolean

true

Terminates touch outside the chart component.

showIndicatorCallback

(opacity: number)
=> void

undefined

If alwaysShowIndicator is false this function is fired with the current indicator opacity whenever the indicator appears or disappears.

style

ViewStyle

{backgroundColor:
'#fff'}

Style of chart component.

throttleAndroid

boolean

false

On some slower Android devices there may be too many calls across the bridge that it can cause some lagging of the indicator movement, this limits the calls to the queue on Android with little noticeable change in the interaction.

toolTipProps

ToolTipProps

undefined

Props for rendering the ToolTip.

width

number

Dimensions
.get('window')
.width

Width of the entire chart.

xAxisProps

XAxisProps

undefined

Props for rendering the XAxis.

xRange

[number, number]
| [Date, Date]

Value of x in first and last object in data array.

The range for the XAxis of the chart to be rendered.

xScale

'time' | 'linear'

'linear'

Determines the applied d3 scale of the chart.

yAxisProps

YAxisProps

undefined

Props for rendering the YAxis.

yRange

[number, number]

Max and Min value of y in data array

The range for the YAxis of the chart to be rendered.

Bar Chart Props:

barSelectedColor

string

undefined

Sets the bar color for the selected bar. Takes precedence over renderSelectedFillGradient.

barSpacing

number

1

Sets the space that should be rendered between each bar on the bar chart.

barWidth

number

undefined

Sets the width of each bar, takes precedence over barSpacing when applied.

hideSelection

boolean

false

Prevents fillColor or renderSelectedFillGradient from being applied to the selected bar.

renderSelectedFillGradient

(props:
GradientProps)
=> JSX.Element
| null

Default Selected Fill Gradient

Function that takes GradientProps and returns a custom gradient to fill the selected bar.

selectionChangedCallback

(bar: number)
=> void

undefined

This callback is fired when the bar selection has changed via touch. This can be used to fire off haptic feedback to the user, or for other side effects. If using expo selection feedback on iOS using expo-haptics is suggested.

Area Chart Props:

cursorProps

CursorProps

{cursorMarkerHeight: 24,
cursorMarkerWidth: 24,
cursorWidth: 2}

Props for Cursor that follows the touch.

curveType

shape.CurveFactory
| shape
.CurveFactoryLineOnly

shape.curveMonotoneX

Type of curve to use for the area chart from d3-shape.

chartLineColor

string

'#0081EB'

Color for the line designating the data charted.

chartLineWidth

number

3

Stroke width of the line designating the data charted.

Axis

Common X and Y Axis Props:

axisLabel

string

undefined

Label for the axis.

axisLabelStyle

TSpanProps &
{ color: string }

{fontSize: 13,
color: '#777'}

Styling for axisLabel, extends TSpanProps from react-native-svg with type color.

labelTopPadding

number

4

Space above the label to offset it from either the top of the component (Y-Axis) or the bottom of the chart (X-Axis).

X-Axis Props:

adjustForSpecialMarkers

boolean

false

If specialStartmarker or specialEndMarker are set it adjusts the text to left or right align to the edge of the chart.

axisLabelAlignment

XAxisLabelAlignment

right

Position for the axisLabel below the chart.

axisMarkerLabels

string[]

[]

Array of labels placed below the chart, these will line up with the bars if there are an adequate amount, or space evenly otherwise.

labelBottomOffset

number

0

If axisMarkerLabels and axisLabel the axisLabel will bottom justify and this offset will apply to it.

markerSpacing

number

undefined

If axisMarkerLabels are overcrowded a number of empty marker spaces can be given to set between each marker shown.

markerTopPadding

number

4

The axis marker labels are top justified below the chart, this is the space between the marker and the chart.

minimumSpacing

number

0

The first and last marker are always shown then the rest are laid out left to right; if the marker before the final one would layout closer than markerSpacing to the final marker, this can be avoided with minimum spacing. This is also useful in making room for a specialEndMarker.

specialEndMarker

string

undefined

The right hand marker of the chart can be set to a special marker.e.g. 'end'

specialStartMarker

string

undefined

The left hand marker of the chart can be set to a special marker.e.g. 'start'

Y-Axis Props:

averageLineColor

string

'#77777780'

Color for average line.

averageMarkerDecimals

number

0

Number of decimal places to show in the average marker if markAverageLine is true.

axisAverageMarkerStyle

TSpanProps &
{ color:
string }

{
fontSize:
13,
color:
'#77777780'
}

Styling for marker, extends TSpanProps from react-native-svg with type color.

axisLabelAlignment

YAxisLabelAlignment

aboveTicks

Position for the axis label left of the chart.

axisMarkerStyle

TSpanProps &
{ color:
string }

{fontSize:
13,
color:
'#222'}

Styling for markers, extends TSpanProps from react-native-svg with type color.

fullBaseLine

boolean

false

Extends bottom line of chart to left edge.

hideMarkers

boolean

undefined

Hides the markers on the Y-Axis without hiding the tick lines.

horizontalLineColor

string

undefined

Color for horizontal lines, overrides renderHorizontalLineGradient.

horizontalLineWidth

number

1

Stroke width for horizontal lines.

interval

number

undefined

Spacing for the Y-Axis ticks, this is determined using numberOfTicks and yRange if not defined while numberOfTicks is given.

labelLeftOffset

number

0

If there are ticks with labels and an axisLabel the axisLabel will left justify and this offset will apply to it.

markAverageLine

boolean

undefined

Show marker next to the average of the data.

markerChartOffset

number

4

Spacing between the markers and the chart to the left of the chart i.e. right of the markers.

markFirstLine

boolean

false

Show marker next to bottom line, often 0 and not visually needed.

numberOfTicks

number

undefined

Number of ticks the chart should have, spaced via interval.

renderHorizontalLineGradient

(props:
GradientProps
& { count:
number }) =>
JSX.Element
| null

Default Horizontal Line Gradient

Function that takes GradientProps and returns a custom gradient for the horizontal lines. The Defs prop key must match the default, i.e. key={props.id}.

renderVerticalLineGradient

(props:
GradientProps)
=> JSX.Element
| null

Default Vertical Line Gradient

Function that takes GradientProps and returns a custom gradient for the vertical side lines. The Defs prop key must match the default, i.e. key={'verticalLineGradient'}.

rotateAxisLabel

boolean

false

Rotates the Y-Axis label vertically.

showAverageLine

boolean

undefined

Shows the average line.

showBaseLine

boolean

true

Shows the base line of the chart.

verticalLineColor

string

undefined

Color for vertical lines, overrides renderVerticallLineGradient.

verticalLineWidth

number

1

Stroke width of the vertial side lines.

Cursor

Cursor Props:

cursorBorderColor

string

'#fff'

Border color for default cursor.

cursorColor

string

'#F4B700'

Internal color for default cursor.

cursorLine

boolean

true

Display line to bottom of chart below cursor.

cursorMarkerHeight

number

24

Height of the cursor, you need to adjust this is you use a custom cursor or want to change the default cursor size.

cursorMarkerWidth

number

24

Width of the cursor, you need to adjust this is you use a custom cursor or want to change the default cursor size.

cursorWidth

number

2

Width of the cursor line.

displayCursor

boolean

true

Display the cursor.

renderCursorMarker

(props:
CursorProps & { ref:
React.RefObject<any>
}) =>
React.ReactNode | null

undefined

Function that returns a custom cursor marker with ref assigned to outer most View.

Tool Tip

Tool Tip Props:

backgroundColor

string

'#fff'

Background color of tool tip.

borderRadius

number

2

Border radius of tool tip corners.

displayToolTip

boolean

true

Display tool tip if toolTipTextRenderers given.

displayTriangle

boolean

true

Display tool tip triangle on bottom of tool tip.

fontSize

number

13

Default font size of tool tip text.

height

number

undefined

Height of the tool tip, you should set this if there are minimal changes to the height across the data as the measurements for setting this can cause jitteriness on Android at times.

lockTriangleCenter

boolean

false

Set the tool tip triangle centered instead of moving to adjust for the position within the chart.

textStyles

TextStyle[]

[]

Array of text styles that match up with toolTipTextRenderers array for styling.

toolTipTextRenderers

Array<(
toolTipTextRenderersInput:
ToolTipTextRenderersInput
) => { text: string }
>

[]

Array of functions that take toolTipTextRenderersInput and return an object that has a text key with a string value.

width

number

undefined

Width of the tool tip, you should set this if there are minimal changes to the width across the data as the measurements for setting this can cause jitteriness on Android at times.

Types

Tool Tip Text Renderers Input:

scaleX

ScaleTime<number, number> |
ScaleLinear<number, number>

The scaleX function used to draw the chart, combined with .invert and x a value can be determined for any cursor position.

scaleY

ScaleLinear<number, number>

The scaleY function used to draw the chart, combined with .invert and y a value can be determined for any cursor position.

selectedBarNumber

number

The selectedBarNumber of the bar chart, this is always 0 for the area chart.

x

number

Current x value of the cursor, use in combination with scaleX.

y

number

Current y value of the cursor, use in combination with scaleY.

Gradient Props:

id

string

The id can be used as the key on the gradient Defs returned to designate it for use by the the chart as shown in the example.

Enums

XAxisLabelAlignment:

enum XAxisLabelAlignment {
  right = 'right',
  left = 'left',
  center = 'center',
}

YAxisLabelAlignment:

enum YAxisLabelAlignment {
  top = 'top',
  bottom = 'bottom',
  middle = 'middle',
  aboveTicks = 'aboveTicks',
}

Gradients

Default Area Chart Fill Gradient:

const defaultAreaChartFillGradient = (props: GradientProps) => {
  return (
    <LinearGradient x1='50%' y1='0%' x2='50%' y2='100%' {...props}>
      <Stop stopColor='#0081EB' offset='0%' stopOpacity='0.2' />
      <Stop stopColor='#FFFFFF' offset='100%' stopOpacity='0.2' />
    </LinearGradient>
  )
}

Default Bar Chart Fill Gradient:

const defaultBarChartFillGradient = (props: GradientProps) => {
  return (
    <LinearGradient x1='50%' y1='0%' x2='50%' y2='100%' {...props}>
      <Stop stopColor='#0081EB' offset='0%' stopOpacity='0.4' />
      <Stop stopColor='#0081EB' offset='100%' stopOpacity='0.4' />
    </LinearGradient>
  )
}

Default Bar Chart Selected Fill Gradient:

const defaultBarChartSelectedFillGradient = (props: GradientProps) => {
  return (
    <LinearGradient x1='50%' y1='0%' x2='50%' y2='100%' {...props}>
      <Stop stopColor='#0081EB' offset='0%' stopOpacity='1' />
      <Stop stopColor='#0081EB' offset='100%' stopOpacity='1' />
    </LinearGradient>
  )
}

Default Vertical Line Gradient:

export const verticalLineGradient = (props: GradientProps) => (
  <Defs key={'verticalLineGradient'}>
    <LinearGradient x1='50%' y1='0%' x2='50%' y2='100%' {...props}>
      <Stop stopColor='#ffffff' offset='0%' stopOpacity='1' />
      <Stop stopColor='#dadada' offset='30%' stopOpacity='1' />
      <Stop stopColor='#dadada' offset='100%' stopOpacity='1' />
    </LinearGradient>
  </Defs>
)

Default Horizontal Line Gradient:

export const horizontalLineGradient = (
  props: GradientProps & { count: number }
) => (
  <Defs key={props.id}>
    <LinearGradient x1='0%' y1='0%' x2='100%' y2='0%' id={props.id}>
      <Stop stopColor='#dadada' offset='0%' stopOpacity='1' />
      <Stop stopColor='#dadada' offset='50%' stopOpacity='1' />
      <Stop stopColor='#dadada' offset='100%' stopOpacity='1' />
    </LinearGradient>
  </Defs>
)