iOS & macOS Charting Documentation - SciChart iOS & macOS Charts SDK v4.x

The SCIZoomPanModifier

SciChart iOS provides an inertial scrolling / panning behavior via the SCIZoomPanModifier, available out of the box.

Besides common features which are inherited from the SCIChartModifierBase class, the SCIZoomPanModifier allows to control its specific features via the following properties:

SCIZoomPanModifier.direction - allows to restrict zooming to the horizontal or vertical direction only if needed.
SCIZoomPanModifier.zoomExtentsY - allows to to keep series’ peeks always in viewport.
SCIZoomPanModifier.clipModeX - allows to specify the behavior when scrolling reaches data extents in X direction via the SCIClipMode enumeration.

There are several modes defined by the SCIClipMode enumeration:

None - Means you can pan right off the edge of the data into uncharted space.
StretchAtExtents - Causes a zooming (stretch) action when you reach the edge of the data.
ClipAtMin - Forces the panning operation to stop suddenly at the minimum of the data, but expand at the maximum.
ClipAtMax - Forces the panning operation to stop suddenly at the maximum of the data, but expand at the minimum.
ClipAtExtents - Forces the panning operation to stop suddenly at the extents of the data.

Adding a SCIZoomPanModifier to a Chart

Any Chart Modifier can be added to a SCIChartSurface via theISCIChartSurface.chartModifiers property and SCIZoomPanModifier is no difference:

    // Assume a surface has been created and configured somewhere
    id<ISCIChartSurface> surface;

    // Create a Modifier
    SCIZoomPanModifier *zoomPanModifier = [SCIZoomPanModifier new];
    zoomPanModifier.direction = SCIDirection2D_XDirection;
    zoomPanModifier.clipModeX = SCIClipMode_StretchAtExtents;
    zoomPanModifier.clipModeY = SCIClipMode_None;
    zoomPanModifier.zoomExtentsY = YES;

    // Add the modifier to the surface
    [self.surface.chartModifiers add:zoomPanModifier];

    // Assume a surface has been created and configured somewhere
    let surface: ISCIChartSurface

    // Create a Modifier
    let zoomPanModifier = SCIZoomPanModifier()
    zoomPanModifier.direction = .xDirection
    zoomPanModifier.clipModeX = .stretchAtExtents
    zoomPanModifier.clipModeY = .none
    zoomPanModifier.zoomExtentsY = true

    // Add the modifier to the surface
    self.surface.chartModifiers.add(zoomPanModifier)

    // Assume a surface has been created and configured somewhere
    IISCIChartSurface surface;

    // Create a Modifier
    var zoomPanModifier = new SCIZoomPanModifier();
    zoomPanModifier.Direction = SCIDirection2D.XDirection;
    zoomPanModifier.ClipModeX = SCIClipMode.StretchAtExtents;
    zoomPanModifier.ClipModeY = SCIClipMode.None;
    zoomPanModifier.ZoomExtentsY = true;

    // Add the modifier to the surface
    Surface.ChartModifiers.Add(zoomPanModifier);

NOTE: To learn more about features available, please visit the Chart Modifier APIs article.