private void UpdateTickPoints()
{
if (_TickPoints == null)
{
return;
}
if (Ticks == null)
{
return;
}
_TickPoints.Clear();
var TotalWidth = (PART_Ticks.ActualWidth - PART_Ticks.Margin.Right - PART_Ticks.Margin.Left);
var ItemWidth = TotalWidth / (Ticks.Count - 1);
int index = 0;
foreach (var Value in Ticks)
{
var TickPoint = new TTickPoint(this, Value);
TickPoint.Left = (int)(index * ItemWidth);
_TickPoints.Add(TickPoint);
index++;
}
if (PART_Ticks != null)
{
PART_Ticks.ItemsSource = _TickPoints;
}
SnapToNearestFromValue();
}
private void SnapToNearestFromLocation()
{
var location = ThumbLeft;
TTickPoint previous = null;
foreach (var item in _TickPoints)
{
if (item.Previous == null)
{
continue;
}
previous = item.Previous;
if (location >= previous.Left && location <= item.Left)
{
double LeftDelta = location - previous.Left;
double RightDelta = item.Left - location;
if (LeftDelta < RightDelta)
{
SnapTo(previous);
}
else
{
SnapTo(item);
}
break;
}
else if (item.Next == null)
{
SnapTo(item);
break;
}
}
}
private void SnapTo(TTickPoint tick)
{
if (Value != tick.Value)
{
Value = tick.Value;
}
if (ThumbLeft != tick.Left)
{
AnimateToLocation(tick.Left);
}
}
private void SnapToNearestFromValue()
{
double value = Value;
TTickPoint previous = null;
if (!_TickPoints.Any())
{
return;
}
var FirstTick = _TickPoints.FirstOrDefault();
var LastTick = _TickPoints.LastOrDefault();
if (value < FirstTick.Value)
{
SnapTo(FirstTick);
return;
}
if (value > LastTick.Value)
{
SnapTo(LastTick);
return;
}
foreach (var item in _TickPoints)
{
if (item.Previous == null)
{
continue;
}
previous = item.Previous;
if (value >= previous.Value && value <= item.Value)
{
double LeftDelta = value - previous.Value;
double RightDelta = item.Value - value;
if (LeftDelta < RightDelta)
{
SnapTo(previous);
}
else
{
SnapTo(item);
}
return;
}
}
}
private void Part_LeftButton_Click(object sender, RoutedEventArgs e)
{
TTickPoint Current = _TickPoints.FirstOrDefault(t => t.Value == Value);
if (Current == null)
{
return;
}
if (sender == Part_LeftButton && Current.Previous != null)
{
Value = Current.Previous.Value;
}
else if (sender == Part_RightButton && Current.Next != null)
{
Value = Current.Next.Value;
}
}
