private void changeStartTime(CGPoint point)
{
if (!isActive || itemIndexPath == null)
{
return;
}
if (point.Y < 0 || point.Y >= Layout.ContentViewHeight)
{
return;
}
LastPoint = point;
var now = timeService.CurrentDateTime;
var newStartTime = NewStartTimeWithDynamicDuration(point, allItemsStartAndEndTime);
var newDuration = calendarItem.Duration.HasValue ? calendarItem.EndTime(now) - newStartTime : null as TimeSpan?;
if (newDuration != null && newDuration <= TimeSpan.Zero ||
newDuration == null && newStartTime > now)
{
return;
}
calendarItem = calendarItem
.WithStartTime(newStartTime)
.WithDuration(newDuration);
itemIndexPath = dataSource.UpdateItemView(itemIndexPath, calendarItem.StartTime, calendarItem.Duration(now));
if (previousStartTime != newStartTime)
{
selectionFeedback.SelectionChanged();
previousStartTime = newStartTime;
}
if (point.Y < TopAutoScrollLine && !CollectionView.IsAtTop())
{
StartAutoScrollUp(changeStartTime);
}
else if (point.Y > BottomAutoScrollLine && calendarItem.Duration > defaultDuration)
{
StartAutoScrolDown(changeStartTime);
}
else
{
StopAutoScroll();
}
}
private void changeOffset(CGPoint point)
{
if (!isActive || itemIndexPath == null)
{
return;
}
var currentPointWithOffest = new CGPoint(point.X, point.Y - verticalOffset);
var newStartTime = NewStartTimeWithStaticDuration(currentPointWithOffest, allItemsStartAndEndTime, calendarItem.Duration);
LastPoint = point;
var now = timeService.CurrentDateTime;
if (newStartTime + calendarItem.Duration > newStartTime.Date.AddDays(1))
{
return;
}
calendarItem = calendarItem
.WithStartTime(newStartTime);
itemIndexPath = dataSource.UpdateItemView(itemIndexPath, calendarItem.StartTime, calendarItem.Duration(now));
if (previousStartTime != newStartTime)
{
selectionFeedback.SelectionChanged();
previousStartTime = newStartTime;
}
var topY = Layout.PointAtDate(calendarItem.StartTime).Y;
var bottomY = Layout.PointAtDate(calendarItem.EndTime(now)).Y;
if (topY < TopAutoScrollLine && !CollectionView.IsAtTop() && didDragUp)
{
StartAutoScrollUp(changeOffset);
}
else if (bottomY > BottomAutoScrollLine && !CollectionView.IsAtBottom() && didDragDown)
{
StartAutoScrolDown(changeOffset);
}
else
{
StopAutoScroll();
}
}