LineTouchData class
Holds data to handle touch events, and touch responses in the LineChart.
There is a touch flow, explained here in a simple way, each chart's renderer captures the touch events, and passes the pointerEvent to the painter, and gets touched spot, and wraps it into a concrete LineTouchResponse.
- Inheritance
-
- Object
- FlTouchData<
LineTouchResponse> - LineTouchData
Constructors
-
LineTouchData({bool enabled = true, BaseTouchCallback<
LineTouchResponse> ? touchCallback, MouseCursorResolver<LineTouchResponse> ? mouseCursorResolver, Duration? longPressDuration, LineTouchTooltipData touchTooltipData = const LineTouchTooltipData(), GetTouchedSpotIndicator getTouchedSpotIndicator = defaultTouchedIndicators, double touchSpotThreshold = 10, CalculateTouchDistance distanceCalculator = _xDistance, bool handleBuiltInTouches = true, GetTouchLineY getTouchLineStart = defaultGetTouchLineStart, GetTouchLineY getTouchLineEnd = defaultGetTouchLineEnd}) -
You can disable or enable the touch system using
enabled
flag,const
Properties
- distanceCalculator → CalculateTouchDistance
-
Distance function used when finding closest points to touch point
final
- enabled → bool
-
You can disable or enable the touch system using enabled flag,
finalinherited
- getTouchedSpotIndicator → GetTouchedSpotIndicator
-
Configs of how touch indicator looks like.
final
- getTouchLineEnd → GetTouchLineY
-
The end point on y axis of the touch line. By default, line ends at the touched point.
If line end is overlap with the dot, it will be automatically adjusted to the edge of the dot.
final
- getTouchLineStart → GetTouchLineY
-
The starting point on y axis of the touch line. By default, line starts on the bottom of
the chart.
final
- handleBuiltInTouches → bool
-
Determines to handle default built-in touch responses,
LineTouchResponse shows a tooltip popup above the touched spot.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- longPressDuration → Duration?
-
This property that allows to customize the duration of the longPress gesture.
default to 500 milliseconds refer to kLongPressTimeout.
finalinherited
-
mouseCursorResolver
→ MouseCursorResolver<
LineTouchResponse> ? -
Using mouseCursorResolver you can change the mouse cursor
based on the provided FlTouchEvent and BaseTouchResponse
finalinherited
-
props
→ List<
Object?> -
Used for equality check, see
EquatableMixin
.no setteroverride - runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- stringify → bool?
-
If set to
true
, the toString method will be overridden to output this instance's props.no setterinherited -
touchCallback
→ BaseTouchCallback<
LineTouchResponse> ? -
touchCallback notifies you about the happened touch/pointer events.
It gives you a FlTouchEvent which is the happened event such as FlPointerHoverEvent, FlTapUpEvent, ...
It also gives you a BaseTouchResponse which is the chart specific type and contains information
about the elements that has touched.
finalinherited
- touchSpotThreshold → double
-
Distance threshold to handle the touch event.
final
- touchTooltipData → LineTouchTooltipData
-
Configs of how touch tooltip popup.
final
Methods
-
copyWith(
{bool? enabled, BaseTouchCallback< LineTouchResponse> ? touchCallback, MouseCursorResolver<LineTouchResponse> ? mouseCursorResolver, Duration? longPressDuration, LineTouchTooltipData? touchTooltipData, GetTouchedSpotIndicator? getTouchedSpotIndicator, double? touchSpotThreshold, CalculateTouchDistance? distanceCalculator, GetTouchLineY? getTouchLineStart, GetTouchLineY? getTouchLineEnd, bool? handleBuiltInTouches}) → LineTouchData - Copies current LineTouchData to a new LineTouchData, and replaces provided values.
-
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.
inherited