DevExtreme React - Zooming and Scrolling

Zooming and scrolling is an efficient way to navigate a chart that contains many series points. A user can zoom and scroll the chart using mouse commands or touch gestures, the scrollbar, or the RangeSelector widget. Each of these cases are detailed in this topic.

Using Mouse Commands or Touch Gestures

Users can zoom the chart by rotating the mouse wheel and scroll it by dragging its plot. On touch-enabled devices, users can zoom the chart using the spread and pinch gestures and scroll the chart using the drag gesture.

DevExtreme HTML5 JavaScript Charts Zooming Scrolling

Zooming and scrolling are configured separately as well as their support for mouse commands and touch gestures. Use the zoomingMode and scrollingMode options to specify whether a user can zoom and scroll the chart using mouse commands, touch gestures, or both.

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Using the Scroll Bar

The scrollbar is a chart element used for scrolling.

DevExtreme HTML5 JavaScript Charts ScrollBar

You can configure the scrollbar using the scrollBar object. To display the scrollbar, set this object's visible option to true after enabling scrolling and zooming in the Chart.

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Using the RangeSelector Widget

The Chart can be zoomed and scrolled using the RangeSelector widget. The following code shows how to bind these widgets. Note that the Chart and RangeSelector have a common data source and may have the same series configuration if the RangeSelector should display the Chart in the background.

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If you need to fix the zoom window and allow users to only move it along the scale, set the scale object's minRange and maxRange options to a single value defining the zoom window's length. Make sure to specify the initial zoom using the value option.

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Set the Initial Zoom

To zoom a standalone Chart initially, call its zoomArgument(startValue, endValue) method after the Chart is created.

If the Chart is bound to the RangeSelector, specify the Chart's initial zoom by setting the RangeSelector's value option.