Interface: ITimeScaleApi<HorzScaleItem>

Interface to chart time scale

Type parameters

• HorzScaleItem

Methods

scrollPosition()

scrollPosition(): number

Return the distance from the right edge of the time scale to the lastest bar of the series measured in bars.

Returns

number

---

scrollToPosition()

scrollToPosition(position, animated): void

Scrolls the chart to the specified position.

Parameters

• position: number

Target data position

• animated: boolean

Setting this to true makes the chart scrolling smooth and adds animation

Returns

void

---

scrollToRealTime()

scrollToRealTime(): void

Restores default scroll position of the chart. This process is always animated.

Returns

void

---

getVisibleRange()

getVisibleRange(): Range<HorzScaleItem>

Returns current visible time range of the chart.

Note that this method cannot extrapolate time and will use the only currently existent data. To get complete information about current visible range, please use getVisibleLogicalRange and ISeriesApi.barsInLogicalRange.

Returns

Range<HorzScaleItem>

Visible range or null if the chart has no data at all.

---

setVisibleRange()

setVisibleRange(range): void

Sets visible range of data.

Note that this method cannot extrapolate time and will use the only currently existent data. Thus, for example, if currently a chart doesn't have data prior 2018-01-01 date and you set visible range with from date 2016-01-01, it will be automatically adjusted to 2018-01-01 (and the same for to date).

But if you can approximate indexes on your own - you could use setVisibleLogicalRange instead.

Parameters

• range: Range<HorzScaleItem>

Target visible range of data.

Returns

void

Example

chart.timeScale().setVisibleRange({
    from: (new Date(Date.UTC(2018, 0, 1, 0, 0, 0, 0))).getTime() / 1000,
    to: (new Date(Date.UTC(2018, 1, 1, 0, 0, 0, 0))).getTime() / 1000,
});

---

getVisibleLogicalRange()

getVisibleLogicalRange(): LogicalRange

Returns the current visible logical range of the chart as an object with the first and last time points of the logical range, or returns null if the chart has no data.

Returns

LogicalRange

Visible range or null if the chart has no data at all.

---

setVisibleLogicalRange()

setVisibleLogicalRange(range): void

Sets visible logical range of data.

Parameters

• range: Range<number>

Target visible logical range of data.

Returns

void

Example

chart.timeScale().setVisibleLogicalRange({ from: 0, to: 10 });

---

resetTimeScale()

resetTimeScale(): void

Restores default zoom level and scroll position of the time scale.

Returns

void

---

fitContent()

fitContent(): void

Automatically calculates the visible range to fit all data from all series.

Returns

void

---

logicalToCoordinate()

logicalToCoordinate(logical): Coordinate

Converts a logical index to local x coordinate.

Parameters

• logical: Logical

Logical index needs to be converted

Returns

Coordinate

x coordinate of that time or null if the chart doesn't have data

---

coordinateToLogical()

coordinateToLogical(x): Logical

Converts a coordinate to logical index.

Parameters

• x: number

Coordinate needs to be converted

Returns

Logical

Logical index that is located on that coordinate or null if the chart doesn't have data

---

timeToCoordinate()

timeToCoordinate(time): Coordinate

Converts a time to local x coordinate.

Parameters

• time: HorzScaleItem

Time needs to be converted

Returns

Coordinate

X coordinate of that time or null if no time found on time scale

---

coordinateToTime()

coordinateToTime(x): HorzScaleItem

Converts a coordinate to time.

Parameters

• x: number

Coordinate needs to be converted.

Returns

HorzScaleItem

Time of a bar that is located on that coordinate or null if there are no bars found on that coordinate.

---

width()

width(): number

Returns a width of the time scale.

Returns

number

---

height()

height(): number

Returns a height of the time scale.

Returns

number

---

subscribeVisibleTimeRangeChange()

subscribeVisibleTimeRangeChange(handler): void

Subscribe to the visible time range change events.

The argument passed to the handler function is an object with from and to properties of type Time, or null if there is no visible data.

Parameters

• handler: TimeRangeChangeEventHandler<HorzScaleItem>

Handler (function) to be called when the visible indexes change.

Returns

void

Example

function myVisibleTimeRangeChangeHandler(newVisibleTimeRange) {
    if (newVisibleTimeRange === null) {
        // handle null
    }

    // handle new logical range
}

chart.timeScale().subscribeVisibleTimeRangeChange(myVisibleTimeRangeChangeHandler);

---

unsubscribeVisibleTimeRangeChange()

unsubscribeVisibleTimeRangeChange(handler): void

Unsubscribe a handler that was previously subscribed using subscribeVisibleTimeRangeChange.

Parameters

• handler: TimeRangeChangeEventHandler<HorzScaleItem>

Previously subscribed handler

Returns

void

Example

chart.timeScale().unsubscribeVisibleTimeRangeChange(myVisibleTimeRangeChangeHandler);

---

subscribeVisibleLogicalRangeChange()

subscribeVisibleLogicalRangeChange(handler): void

Subscribe to the visible logical range change events.

The argument passed to the handler function is an object with from and to properties of type number, or null if there is no visible data.

Parameters

• handler: LogicalRangeChangeEventHandler

Handler (function) to be called when the visible indexes change.

Returns

void

Example

function myVisibleLogicalRangeChangeHandler(newVisibleLogicalRange) {
    if (newVisibleLogicalRange === null) {
        // handle null
    }

    // handle new logical range
}

chart.timeScale().subscribeVisibleLogicalRangeChange(myVisibleLogicalRangeChangeHandler);

---

unsubscribeVisibleLogicalRangeChange()

unsubscribeVisibleLogicalRangeChange(handler): void

Unsubscribe a handler that was previously subscribed using subscribeVisibleLogicalRangeChange.

Parameters

• handler: LogicalRangeChangeEventHandler

Previously subscribed handler

Returns

void

Example

chart.timeScale().unsubscribeVisibleLogicalRangeChange(myVisibleLogicalRangeChangeHandler);

---

subscribeSizeChange()

subscribeSizeChange(handler): void

Adds a subscription to time scale size changes

Parameters

• handler: SizeChangeEventHandler

Handler (function) to be called when the time scale size changes

Returns

void

---

unsubscribeSizeChange()

unsubscribeSizeChange(handler): void

Removes a subscription to time scale size changes

Parameters

• handler: SizeChangeEventHandler

Previously subscribed handler

Returns

void

---

applyOptions()

applyOptions(options): void

Applies new options to the time scale.

Parameters

• options: DeepPartial <HorzScaleOptions>

Any subset of options.

Returns

void

---

options()

options(): Readonly <HorzScaleOptions>

Returns current options

Returns

Readonly <HorzScaleOptions>

Currently applied options