Class HighContrastService

HighContrastService manages the high contrast accessibility mode.

Key behaviors:

Captures original colors in constructor (before any transformations)
Applies high contrast on focus-in via initializeHighContrast()
Restores original colors on blur via suspendHighContrast()
Responds to settings changes (toggle via keyboard/UI)

Implements

Disposable

Index

Constructors

Methods

setFigure initializeHighContrast suspendHighContrast dispose toggleHighContrast interpolateColors

Constructors

constructor

new HighContrastService(
    settings: SettingsService,
    notification: NotificationService,
    displayService: DisplayService,
    figure: Figure,
    context: Context,
): HighContrastService
Parameters
- settings: SettingsService
- notification: NotificationService
- displayService: DisplayService
- figure: Figure
- context: Context
Returns HighContrastService
- Defined in service/highContrast.ts:141

Methods

setFigure

setFigure(figure: Figure): void
Points this service at a rebuilt figure after a live data update and re-captures original element colors. When high contrast is active, it is re-applied to the new model's elements.
Parameters
- figure: Figure
  The replacement figure
Returns void
- Defined in service/highContrast.ts:186

initializeHighContrast

initializeHighContrast(): void
Initialize high contrast mode after the Controller is fully set up. Call this from the Controller after construction to apply high contrast if enabled.

Returns void
- Defined in service/highContrast.ts:199

suspendHighContrast

suspendHighContrast(): void
Suspend high contrast mode visually (restore original colors). Called on blur to return the chart to its original appearance. The setting remains ON - this just hides the visual effect while unfocused.

Returns void
- Defined in service/highContrast.ts:210

dispose

dispose(): void
Returns void
Implementation of Disposable.dispose
- Defined in service/highContrast.ts:256

toggleHighContrast

toggleHighContrast(): void
Toggle high contrast mode on/off. Called from keyboard shortcut (C key).

Returns void
- Defined in service/highContrast.ts:294

interpolateColors

interpolateColors(startColor: string, endColor: string, count: number): string[]
Parameters
- startColor: string
- endColor: string
- count: number
Returns string[]
- Defined in service/highContrast.ts:806

src