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Added autocenter to timeline widget #8

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Added autocenter to timeline widget #8

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14 changes: 14 additions & 0 deletions lib/src/widgets/time_line_widget/timeline_widget.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,7 @@ class TimeLineWidget extends StatefulWidget {
required this.focusedDate,
required this.activeDayTextColor,
required this.activeDayColor,
this.autoCenter = true,
}) : assert(timeLineProps.hPadding > -1,
"Can't set timeline hPadding less than zero."),
assert(timeLineProps.separatorPadding > -1,
Expand Down Expand Up @@ -59,6 +60,11 @@ class TimeLineWidget extends StatefulWidget {
/// The background color of the selected day.
final Color activeDayColor;

/// Automatically centers the selected day in the timeline.
/// If set to `true`, the timeline will automatically scroll to center the selected day.
/// If set to `false`, the timeline will not scroll when the selected day changes.
final bool autoCenter;

@override
State<TimeLineWidget> createState() => _TimeLineWidgetState();
}
Expand Down Expand Up @@ -181,5 +187,13 @@ class _TimeLineWidgetState extends State<TimeLineWidget> {
void _onDayChanged(bool isSelected, DateTime currentDate) {
// A date is selected
widget.onDateChange?.call(currentDate);
// Mantain the selected day in the center of the timeline
if (widget.autoCenter)
_controller.animateTo(
_calculateDateOffset(currentDate) -
(MediaQuery.of(context).size.width - _dayOffsetConstrains) / 2.09,
duration: Duration(milliseconds: 500),
curve: Curves.decelerate,
);
}
}