private static object CoerceValue(DependencyObject element, object value)
{
double newValue = (double)value;
KnobControl control = (KnobControl)element;
return(newValue);
}
/*
* Methods that make the ValueChange event in this control
*/
protected static void OnValueChanged(DependencyObject obj, DependencyPropertyChangedEventArgs args)
{
KnobControl control = (KnobControl)obj;
RoutedPropertyChangedEventArgs <double> e = new RoutedPropertyChangedEventArgs <double>((double)args.OldValue, (double)args.NewValue, ValueChangedEvent);
control.OnValueChanged(e);
}
/*
* Method that will move the central frequency of a filter and will make the transfer function curve represent again.
*/
private void Knob_ValueChanged(object sender, RoutedPropertyChangedEventArgs <double> e)
{
//Get the sender element as a KnobControl
KnobControl cknob = (KnobControl)sender;
//The value of the KnobControl set the central frequency of its band
eq.GetFilter(Knobtoint(cknob.Name)).SetFrequency(cknob.Value);
//Make an instance of Equalizer drawer and calculate the points
EqualizerDrawer drawer = EqualizerDrawer.Instance(eq);
drawer.CalculatePoints();
List <Point> listPoints = drawer.GetPoints();
if (this.Points == null)
{
this.Points = new List <DataPoint>();
}
//If there is not curve we add new points
//else we change the points
if (this.Points.Count == 0)
{
for (int i = 0; i < listPoints.Count; i++)
{
this.Points.Add(new DataPoint(listPoints[i].X, listPoints[i].Y));
}
}
else
{
for (int i = 0; i < this.Points.Count; i++)
{
this.Points[i] = new DataPoint(listPoints[i].X, listPoints[i].Y);
}
}
//Points refering the filter properties
if (this.CirclePoint == null)
{
this.CirclePoint = new List <DataPoint>();
}
if (this.CirclePoint.Count == 0)
{
for (int band = 0; band < eq.GetNumberOfBands(); band++)
{
this.CirclePoint.Add(new DataPoint(eq.GetFilter(band).GetFrequency(), eq.GetFilter(band).GetBoost()));
}
}
else
{
for (int band = 0; band < eq.GetNumberOfBands(); band++)
{
this.CirclePoint[band] = new DataPoint(eq.GetFilter(band).GetFrequency(), eq.GetFilter(band).GetBoost());
}
}
//Redrawing
if (plotter != null)
{
plotter.InvalidatePlot();
}
}