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Add pageSnapping option for customizing horizontal scroll #721

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@coragx coragx commented Jul 27, 2022

Purpose: expose the pageSnapping property of horizontal PageView

@coragx coragx closed this Jul 29, 2022
@coragx coragx reopened this Aug 1, 2022
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coragx commented Aug 1, 2022

Example:

  1. Set availableGestures: AvailableGestures.none to disable inner gestures.
  2. Wrap TableCalendar in a GestureDetector to define custom behaviors.
      GestureDetector(
        child: TableCalendar(
          availableGestures: AvailableGestures.none,
          pageSnapping: false,
          ...
        ),
        onHorizontalDragStart: (details) {
          dragStartOffsetX = details.localPosition.dx;
          initialOffsetX = calendarOffset;
        },
        onVerticalDragStart: (details) {
          dragStartOffsetY = details.localPosition.dy;
        },
        onHorizontalDragUpdate: (details) {
          dragDistance = dragStartOffsetX - details.localPosition.dx;
          _pageController.jumpTo(initialOffsetX + dragDistance);
        },
        onVerticalDragUpdate: (details) {
            dragDistance = dragStartOffsetY - details.localPosition.dy;
            if (dragDistance > 0) {
              /// Change height
            }
        },
        onHorizontalDragEnd: (details) {
        },
        onVerticalDragEnd: (details) {
        },
      ),

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