SparkChartTrackball class
Enables and customizes the trackball.
Trackball feature displays the tooltip for the data points that are closer to the point where you touch on the chart area. This feature can be enabled by creating an instance of SparkChartTrackball.
Provides option to customizes the activationMode, width, color, labelStyle, backgroundColor, borderColor, borderWidth.
- Annotations
Constructors
-
SparkChartTrackball({double width = 2, Color? color, List<
double> ? dashArray, SparkChartActivationMode activationMode = SparkChartActivationMode.tap, TextStyle? labelStyle, SparkChartTooltipCallback<String> ? tooltipFormatter, Color? backgroundColor, bool shouldAlwaysShow = false, double hideDelay = 0, Color? borderColor, double borderWidth = 0, BorderRadius borderRadius = const BorderRadius.all(Radius.circular(5))}) -
Creates an instance of spark chart trackball to enable the trackball
on the closest data point from the touch position.
const
Properties
- activationMode → SparkChartActivationMode
-
Defines the gesture for activating the trackball to the closest data point.
final
- backgroundColor → Color?
-
Customizes the background color of the trackball tooltip.
The color is set based on the current application theme, if its value is
set to null.
final
- borderColor → Color?
-
Customizes the border color of the trackball tooltip.
To make border visible for plot band, need to set both the border
color and border width.
final
- borderRadius → BorderRadius
-
Customizes the border radius of trackball tooltip.
final
- borderWidth → double
-
Customizes the border width of the plot band. To make border visible for
plot band, need to set both the border color and border width.
final
- color → Color?
-
Customizes the color of the trackball line.
The color is set based on the current application theme,
if its value is set to null.
final
-
dashArray
→ List<
double> ? -
Dashes of the trackball line. Any number of values can be provided on the
list. Odd value is considered as rendering size and even value is
considered a gap.
final
- hashCode → int
-
The hash code for this object.
no setteroverride
- hideDelay → double
-
Provides the time delay to disappear the trackball on touch.
The provided value will be considered as milliseconds.
When
`shouldAlwaysShow`is set as false, the value provided to this property will be considered as a delay.final - labelStyle → TextStyle?
-
Customizes the data label text style.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- shouldAlwaysShow → bool
-
Shows or hides the trackball..
final
-
tooltipFormatter
→ SparkChartTooltipCallback<
String> ? -
Callback that gets triggered when a trackball tooltip text is created.
final
- width → double
-
Customizes the width of the trackball line.
final
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
override