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suiss/ui · Chart

Line Chart Forecast

A solid line for actual values that continues as a dashed forecast over a shaded future range.

Line Chart Forecast is an open-source chart from suiss/ui for React, React Native, SwiftUI and Jetpack Compose. The @esuiss/ui CLI copies its source into your project, so you own the code.

components/charts/line-chart-forecast.tsx
"use client"

import { CartesianGrid, Line, LineChart, ReferenceArea, XAxis } from "recharts"

import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card"
import {
  type ChartConfig,
  ChartContainer,
  ChartTooltip,
  ChartTooltipContent,

Actual values drawn as a solid line that continues as a dashed forecast over a shaded future period. Use it whenever you show projections next to history and need readers to tell them apart.

Installation

CLI

$ pnpm dlx shadcn@latest add @esuiss/line-chart-forecast

Works in any project with a components.json. See Installation for the one-line registry setup. Or use the suiss/ui CLI:

$ pnpm dlx @esuiss/ui@latest add charts line-chart-forecast

Manual

  1. Install the dependencies:
$ pnpm add recharts

  1. Add the pieces it builds on: Card, Chart.

  2. Copy the source into components/charts/line-chart-forecast.tsx:

components/charts/line-chart-forecast.tsx
"use client"

import { CartesianGrid, Line, LineChart, ReferenceArea, XAxis } from "recharts"

import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card"
import {
  type ChartConfig,
  ChartContainer,
  ChartTooltip,
  ChartTooltipContent,
  1. Update the import paths to match your project.

Usage

import { LineChartForecast } from "@/components/charts/line-chart-forecast"
<LineChartForecast />

Fill the actual and forecast arrays; the forecast should start with the last actual value so the two lines meet. Move the shaded period by changing x1 and x2 on the reference area to match your first and last forecast labels. Both series share one color in chartConfig.

Notes

Since actual and forecast use the same color, the dash pattern and shading carry the distinction; the tooltip also names each series. At the handover point the tooltip lists both values.

iOS
Line (forecast) on iOS in light modeLine (forecast) on iOS in dark mode
uniwind/components/charts/line-chart-forecast.tsx
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card"
import {
  CartesianGrid,
  type ChartConfig,
  ChartContainer,
  ChartTooltip,
  ChartTooltipContent,
  Line,
  LineChart,
  ReferenceArea,
swift/Charts/LineChartForecast.swift
import Charts
import SwiftUI

private let actual: [Double] = [12, 14, 13, 17, 19, 22, 24, 23, 26]
private let forecast: [Double] = [26, 28, 30, 33]
private let months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]

private let chartConfig: ChartConfig = [
  "actual": .init("Actual", color: EsuissColor.chart1),
  "forecast": .init("Forecast", color: EsuissColor.chart1),
]

private func value(_ key: String, _ index: Int) -> Double? {
  if key == "actual" { return actual.indices.contains(index) ? actual[index] : nil }
  return index >= 8 ? forecast[index - 8] : nil
}
kotlin/charts/LineChartForecast.kt
package com.esuiss.ui.charts

import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.unit.dp
import com.esuiss.ui.components.Card
import com.esuiss.ui.components.CardContent
import com.esuiss.ui.components.CardHeader
import com.esuiss.ui.components.CardSize
import com.esuiss.ui.components.CardVariant
import com.esuiss.ui.components.ChartConfig
import com.esuiss.ui.components.ChartConfigItem
import com.esuiss.ui.components.ChartContainer
import com.esuiss.ui.components.ChartCurve

Two series share one axis: actual fills the first nine months and forecast continues from September, drawn with strokeDasharray. A ReferenceArea shades September to December to mark the forecast period. Missing values are null, so each line stops where its data ends.

Installation

$ pnpm dlx shadcn@latest add @esuiss-rn/line-chart-forecast

See Installation for the components.json setup. Or use the suiss/ui CLI:

$ pnpm dlx @esuiss/ui@latest add line-chart-forecast
$ pnpm dlx @esuiss/ui@latest add line-chart-forecast --platform swift
$ pnpm dlx @esuiss/ui@latest add line-chart-forecast --platform kotlin

The CLI also adds what it builds on: Card, Chart.

Manual

  1. Add the pieces it builds on: Card, Chart.

  2. Copy the source into components/charts/line-chart-forecast.tsx:

uniwind/components/charts/line-chart-forecast.tsx
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card"
import {
  CartesianGrid,
  type ChartConfig,
  ChartContainer,
  ChartTooltip,
  ChartTooltipContent,
  Line,
  LineChart,
  ReferenceArea,
  1. Update the import paths to match your project.

  1. Add the pieces it builds on: Card, Chart.

  2. Copy the source into components/charts/line-chart-forecast.tsx:

nativewind/components/charts/line-chart-forecast.tsx
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card"
import {
  CartesianGrid,
  type ChartConfig,
  ChartContainer,
  ChartTooltip,
  ChartTooltipContent,
  Line,
  LineChart,
  ReferenceArea,
  1. Update the import paths to match your project.

  1. Add the pieces it builds on: Card, Chart.

  2. Copy the source into components/charts/line-chart-forecast.tsx:

stylesheet/components/charts/line-chart-forecast.tsx
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card"
import {
  CartesianGrid,
  type ChartConfig,
  ChartContainer,
  ChartTooltip,
  ChartTooltipContent,
  Line,
  LineChart,
  ReferenceArea,
  1. Update the import paths to match your project.

  1. Target iOS 17 or later.

  2. Copy the theme files every view uses:

swift/Theme/Theme.swift
import SwiftUI
import UIKit

struct RGBA: Sendable {
  let red: CGFloat
  let green: CGFloat
  let blue: CGFloat
  let alpha: CGFloat

  init(_ hex: UInt32, _ alpha: CGFloat = 1) {
    red = CGFloat((hex >> 16) & 0xFF) / 255
    green = CGFloat((hex >> 8) & 0xFF) / 255
    blue = CGFloat(hex & 0xFF) / 255
    self.alpha = alpha
  }
swift/Theme/Tokens.swift
import SwiftUI

public enum EsuissColor {
  public static let background = Color.adaptive(light: .init(0xFFFFFF), dark: .init(0x000000))
  public static let foreground = Color.adaptive(light: .init(0x1D1D1F), dark: .init(0xF5F5F7))
  public static let card = Color.adaptive(light: .init(0xFFFFFF), dark: .init(0x1D1D1F))
  public static let cardForeground = Color.adaptive(light: .init(0x1D1D1F), dark: .init(0xF5F5F7))
  public static let popover = Color.adaptive(light: .init(0xFFFFFF), dark: .init(0x1D1D1F))
  public static let popoverForeground = Color.adaptive(light: .init(0x1D1D1F), dark: .init(0xF5F5F7))
  public static let primary = Color.adaptive(light: .init(0x0071E3), dark: .init(0x2997FF))
  public static let primaryForeground = Color.adaptive(light: .init(0xFFFFFF), dark: .init(0xFFFFFF))
  public static let secondary = Color.adaptive(light: .init(0x000000, 0.04), dark: .init(0xFFFFFF, 0.1))
  public static let secondaryForeground = Color.adaptive(light: .init(0x1D1D1F), dark: .init(0xF5F5F7))
  public static let muted = Color.adaptive(light: .init(0xF5F5F7), dark: .init(0x161617))
  public static let mutedForeground = Color.adaptive(light: .init(0x6E6E73), dark: .init(0xA1A1A6))
  public static let accent = Color.adaptive(light: .init(0x000000, 0.06), dark: .init(0xFFFFFF, 0.1))
  1. Copy the source and every file it uses:
swift/Charts/LineChartForecast.swift
import Charts
import SwiftUI

private let actual: [Double] = [12, 14, 13, 17, 19, 22, 24, 23, 26]
private let forecast: [Double] = [26, 28, 30, 33]
private let months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]

private let chartConfig: ChartConfig = [
  "actual": .init("Actual", color: EsuissColor.chart1),
  "forecast": .init("Forecast", color: EsuissColor.chart1),
]

private func value(_ key: String, _ index: Int) -> Double? {
  if key == "actual" { return actual.indices.contains(index) ? actual[index] : nil }
  return index >= 8 ? forecast[index - 8] : nil
}
swift/Components/Card.swift
import SwiftUI

public struct Card<Content: View>: View {
  public enum Variant: CaseIterable, Sendable {
    case `default`, filled
  }

  public enum Size: CaseIterable, Sendable {
    case `default`, sm

    var spacing: CGFloat {
      switch self {
      case .default: 24
      case .sm: 16
      }
    }
swift/Components/Chart.swift
import Charts
import SwiftUI

public struct ChartConfig: ExpressibleByDictionaryLiteral, Sendable {
  public struct Item: Sendable {
    public var label: String?
    public var color: Color?
    public var icon: Image?

    public init(_ label: String? = nil, color: Color? = nil, icon: Image? = nil) {
      self.label = label
      self.color = color
      self.icon = icon
    }
  }
swift/Components/Haptics.swift
import SwiftUI

extension EnvironmentValues {
  @Entry public var hapticsEnabled = true
}

extension View {
  public func haptics(_ enabled: Bool) -> some View {
    environment(\.hapticsEnabled, enabled)
  }

  func hapticFeedback<Trigger: Equatable>(_ feedback: SensoryFeedback, trigger: Trigger) -> some View {
    modifier(HapticFeedbackModifier(feedback: feedback, trigger: trigger) { _, _ in true })
  }

  func hapticFeedback<Trigger: Equatable>(
swift/Components/Item.swift
import SwiftUI

public enum ItemVariant: CaseIterable, Sendable {
  case `default`, outline, muted
}

public enum ItemSize: CaseIterable, Sendable {
  case `default`, sm, xs

  var horizontalPadding: CGFloat {
    switch self {
    case .default: 16
    case .sm: 14
    case .xs: 12
    }
  }
swift/Components/Separator.swift
import SwiftUI

public struct Separator: View {
  let orientation: Axis

  public init(_ orientation: Axis = .horizontal) {
    self.orientation = orientation
  }

  public var body: some View {
    Rectangle()
      .fill(EsuissColor.border)
      .frame(width: orientation == .vertical ? 1 : nil, height: orientation == .horizontal ? 1 : nil)
      .frame(maxWidth: orientation == .horizontal ? .infinity : nil, maxHeight: orientation == .vertical ? .infinity : nil)
      .accessibilityHidden(true)
  }
swift/Components/TextVariant.swift
import SwiftUI

public enum TextVariant: CaseIterable, Sendable {
  case `default`, h1, h2, h3, h4, p, blockquote, code, lead, large, small, muted

  var style: TextStyle {
    switch self {
    case .h1: .xl3
    case .h2: .xl2
    case .h3: .xl
    case .h4, .lead, .large: .lg
    case .code, .small, .muted: .sm
    default: .base
    }
  }
  1. Add the files to your app target.
  1. Set minSdk to 24 or higher and add the dependencies:
build.gradle.kts
implementation(platform("androidx.compose:compose-bom:2026.09.00"))
implementation("androidx.compose.foundation:foundation")
implementation("androidx.compose.ui:ui")
  1. Copy the theme files every view uses:
kotlin/theme/Theme.kt
package com.esuiss.ui.theme

import androidx.compose.foundation.isSystemInDarkTheme
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.Immutable
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.dropShadow
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.Shape
import androidx.compose.ui.graphics.shadow.Shadow as DropShadow
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.text.style.LineHeightStyle
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.DpOffset
kotlin/theme/Tokens.kt
package com.esuiss.ui.theme

import androidx.compose.runtime.Immutable
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.unit.dp

@Immutable
data class Colors(
    val background: Color,
    val foreground: Color,
    val card: Color,
    val cardForeground: Color,
    val popover: Color,
    val popoverForeground: Color,
    val primary: Color,
    val primaryForeground: Color,
  1. Copy the source and every file it uses:
kotlin/charts/LineChartForecast.kt
package com.esuiss.ui.charts

import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.unit.dp
import com.esuiss.ui.components.Card
import com.esuiss.ui.components.CardContent
import com.esuiss.ui.components.CardHeader
import com.esuiss.ui.components.CardSize
import com.esuiss.ui.components.CardVariant
import com.esuiss.ui.components.ChartConfig
import com.esuiss.ui.components.ChartConfigItem
import com.esuiss.ui.components.ChartContainer
import com.esuiss.ui.components.ChartCurve
kotlin/components/Card.kt
package com.esuiss.ui.components

import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.ColumnScope
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.RowScope
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.foundation.text.BasicText
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.compositionLocalOf
kotlin/components/Chart.kt
package com.esuiss.ui.components

import androidx.compose.animation.core.Animatable
import androidx.compose.animation.core.CubicBezierEasing
import androidx.compose.animation.core.Easing
import androidx.compose.animation.core.LinearEasing
import androidx.compose.animation.core.tween
import androidx.compose.foundation.Canvas
import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.gestures.detectHorizontalDragGestures
import androidx.compose.foundation.gestures.detectTapGestures
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.BoxScope
import androidx.compose.foundation.layout.BoxWithConstraints
kotlin/components/Content.kt
package com.esuiss.ui.components

import androidx.compose.runtime.compositionLocalOf
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.dp

val LocalContentStyle = compositionLocalOf { TextStyle.Default }

val LocalContentColor = compositionLocalOf { Color.Unspecified }

val LocalIconSize = compositionLocalOf { 20.dp }
kotlin/components/FormSupport.kt
package com.esuiss.ui.components

import android.provider.Settings
import androidx.compose.animation.core.CubicBezierEasing
import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.gestures.Orientation
import androidx.compose.foundation.text.selection.TextSelectionColors
import androidx.compose.runtime.Composable
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.alpha
import androidx.compose.ui.draw.clip
import androidx.compose.ui.draw.drawWithContent
import androidx.compose.ui.geometry.Offset
kotlin/components/Haptics.kt
package com.esuiss.ui.components

import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.remember
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.hapticfeedback.HapticFeedback
import androidx.compose.ui.hapticfeedback.HapticFeedbackType
import androidx.compose.ui.platform.LocalHapticFeedback

val LocalHapticsEnabled = staticCompositionLocalOf { true }

@Composable
fun ProvideHaptics(enabled: Boolean, content: @Composable () -> Unit) {
    CompositionLocalProvider(LocalHapticsEnabled provides enabled, content = content)
}
kotlin/components/Icon.kt
package com.esuiss.ui.components

import androidx.compose.foundation.Image
import androidx.compose.foundation.layout.size
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.ColorFilter
import androidx.compose.ui.graphics.takeOrElse
import androidx.compose.ui.graphics.vector.ImageVector
import androidx.compose.ui.unit.Dp
import com.esuiss.ui.theme.EsuissTheme

@Composable
fun Icon(
    imageVector: ImageVector,
  1. Update the com.esuiss.ui package names to match your project.

Usage

import { LineChartForecast } from "@/components/charts/line-chart-forecast"
<LineChartForecast />

Replace the actual and forecast arrays; the forecast starts at the index set in chartData. Move the ReferenceArea x1 and x2 to match your forecast range. The component takes no props.

NextLine Chart GoalPreviousLine Chart Dots

On this page

  1. 01Installation
    • CLI
    • Manual
  2. 02Usage
  3. 03Notes
  4. 04Installation
    • Manual
  5. 05Usage