/// <summary>
/// Moves an event to a new start date (preserving duration) and updates labels.
/// </summary>
/// <param name="ev">Event to move</param>
/// <param name="newStartDate">New start date for event</param>
private void MoveEvent(Event ev, DateTime newStartDate)
{
var newRange = new TimeRange(ev.Start, ev.End);
newRange.MoveToDate(newStartDate);
UpdateEvent(ev, newRange);
}
/// <summary>
/// Highlights destination cells during drag
/// </summary>
private void HandleDragging(object sender, DragEventArgs args)
{
var label = sender as DraggableView;
if (label == null)
{
return;
}
var ev = label.BindingContext as Event;
if (ev == null)
{
return;
}
var destinationPoint = GetDragDestinationPoint(args.Center, label);
var newDate = GetDateAtPoint(destinationPoint);
if (newDate.HasValue)
{
// Offset for this not being the first label of the event
newDate = newDate.Value.AddDays(-_dragLabelDayOffset);
var newRange = new TimeRange(ev.Start, ev.End);
newRange.MoveToDate(newDate.Value);
// Highlight target cells, un-highlight previously-targeted cells
//
HighlightCells(newRange.StartDate, newRange.EndDate);
}
}