Inherits from NSObject
Declared in TKChartTrackball.h

Overview

The trackball used in TKChart.

Tasks

Properties

hideMode

The trackball hide mode.

@property (nonatomic, assign) TKChartTrackballHideMode hideMode

Discussion

The available hide modes are specified below:

typedef enum { TKChartTrackballHideOnTouchUp, TKChartTrackballHideOnSecondTouch } TKChartTrackballHideMode

Declared In

TKChartTrackball.h

isVisible

Returns a value indicating whether the trackball is currently visible (read-only).

@property (nonatomic, readonly) BOOL isVisible

Declared In

TKChartTrackball.h

line

Returns the line annotation used to present the trackball (read-only).

@property (nonatomic, strong, readonly) TKChartTrackballLineAnnotation *line

Declared In

TKChartTrackball.h

marginForHitDetection

If set to a nonzero value the trackball will show only when the touch event occured in the specified distance to an actual point in chart.

@property (nonatomic, assign) CGFloat marginForHitDetection

Declared In

TKChartTrackball.h

minimumPressDuration

Default is 0.5. Time in seconds the fingers must be held down for the gesture to be recognized

@property (nonatomic, assign) CGFloat minimumPressDuration

Declared In

TKChartTrackball.h

orientation

The trackball orientation.

@property (nonatomic, assign) TKChartTrackballOrientation orientation

Discussion

The available orientation modes are specified below:

typedef enum { TKChartTrackballOrientationHorizontal, // The trackball will search for points with equal x coordinates. TKChartTrackballOrientationVertical, // The trackball will search for points with equal y coordinates. } TKChartTrackballOrientation;

Declared In

TKChartTrackball.h

snapMode

Gets or sets the trackball snap mode.

@property (nonatomic, assign) TKChartTrackballSnapMode snapMode

Discussion

The available snap modes are specified below:

typedef enum { TKChartTrackballSnapModeClosestPoint, // Only the closest point is selected TKChartTrackballSnapModeAllClosestPoints, // All points within the specified range are selected } TKChartTrackballSnapMode;

Declared In

TKChartTrackball.h

tooltip

Returns the tooltip annotation used to present the trackball (read-only).

@property (nonatomic, strong, readonly) TKChartTrackballTooltipAnnotation *tooltip

Declared In

TKChartTrackball.h

Instance Methods

hide

Hides the trackball.

- (void)hide

Declared In

TKChartTrackball.h

initWithChart:

Initializes the trackball with a TKChart instance.

- (instancetype __nonnull)initWithChart:(TKChart *__nonnull)chart

Parameters

chart

The chart which owns this annotation.

Declared In

TKChartTrackball.h

showAtPoint:

Displayes the trackball by specifying a plot area coordinates.

- (void)showAtPoint:(CGPoint)point

Parameters

point

The point where the trackball should locate.

Declared In

TKChartTrackball.h