BarTouchData constructor
- bool? enabled,
- BaseTouchCallback<
BarTouchResponse> ? touchCallback, - MouseCursorResolver<
BarTouchResponse> ? mouseCursorResolver, - Duration? longPressDuration,
- BarTouchTooltipData? touchTooltipData,
- EdgeInsets? touchExtraThreshold,
- bool? allowTouchBarBackDraw,
- bool? handleBuiltInTouches,
You can disable or enable the touch system using enabled
flag,
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 BarTouchResponse which contains information
about the elements that has touched.
Using mouseCursorResolver
you can change the mouse cursor
based on the provided FlTouchEvent and BarTouchResponse
if handleBuiltInTouches
is true, BarChart shows a tooltip popup on top of the bars if
touch occurs (or you can show it manually using, BarChartGroupData.showingTooltipIndicators),
You can customize this tooltip using touchTooltipData
.
If you need to have a distance threshold for handling touches, use touchExtraThreshold
.
If allowTouchBarBackDraw
sets to true, touches will work
on BarChartRodData.backDrawRodData too (by default it only works on the main rods).
Implementation
BarTouchData({
bool? enabled,
BaseTouchCallback<BarTouchResponse>? touchCallback,
MouseCursorResolver<BarTouchResponse>? mouseCursorResolver,
Duration? longPressDuration,
BarTouchTooltipData? touchTooltipData,
EdgeInsets? touchExtraThreshold,
bool? allowTouchBarBackDraw,
bool? handleBuiltInTouches,
}) : touchTooltipData = touchTooltipData ?? BarTouchTooltipData(),
touchExtraThreshold = touchExtraThreshold ?? const EdgeInsets.all(4),
allowTouchBarBackDraw = allowTouchBarBackDraw ?? false,
handleBuiltInTouches = handleBuiltInTouches ?? true,
super(
enabled ?? true,
touchCallback,
mouseCursorResolver,
longPressDuration,
);