//Event handlers
private void scrubberGrid_MouseDown(object sender, MouseButtonEventArgs e)
{
if (e.ChangedButton != MouseButton.Left)
{
return;
}
//change the scrub pos to the place we clicked on
double clickedPos = e.GetPosition(this).X;
SelectedTime = IPannableZoomableUtils.GlobalToLocalPos(clickedPos, this);
}
private void UpdateScrubber()
{
//Update the handle's position
double pos = IPannableZoomableUtils.LocalToGlobalPos((double)SelectedTime, this);
Thickness margin = scrubHandle.Margin;
margin.Left = pos - scrubHandle.Width / 2;
scrubHandle.Margin = margin;
//Update the seek line's position
margin = scrubberRedLine.Margin;
margin.Left = pos;
margin.Top = scrubHandle.Margin.Top + scrubHandle.Height;
scrubberRedLine.Margin = margin;
}
private void SnapToPoint()
{
//Get all the snap points
double[] snapPoints = GetSnapPoints();
//Don't go on if there are no snap points
if (snapPoints.Length == 0)
{
return;
}
//Find the closest snap point
double closestSnapPoint = 0;
double closestSnapDistance = double.MaxValue;
foreach (double point in snapPoints)
{
//Update the closest snap point
double dist = Math.Abs(point - scrubberTargetTime);
if (dist < closestSnapDistance)
{
closestSnapDistance = dist;
closestSnapPoint = point;
}
}
//Find the scrubber's physical distance from the snap point
double physicalScrubberPos = IPannableZoomableUtils.LocalToGlobalPos(scrubberTargetTime, this);
double physicalSnapPos = IPannableZoomableUtils.LocalToGlobalPos(closestSnapPoint, this);
double physicalDistance = Math.Abs(physicalScrubberPos - physicalSnapPos);
//Snap to the point if it's close enough
const double SNAP_MARGIN = 5;
if (physicalDistance < SNAP_MARGIN)
{
SelectedTime = closestSnapPoint;
}
}