protected void TimerCallback()
{
try
{
if (IsHandleCreated)
{
BeginInvoke(new MethodInvoker(Refresh));
}
else
{
return;
}
}
catch { }
int nDecValue = _MaxRangeValue / _LEDCount;
bool noUpdate = true;
Monitor.Enter(_meterData);
for (int i = 0; i < _meterData.Length; i++)
{
PeakMeterData pm = _meterData[i];
if (pm.Value > 0)
{
pm.Value -= (_LEDCount > 1 ? nDecValue : (_MaxRangeValue * DecrementPercent) / 100);
if (pm.Value < 0)
{
pm.Value = 0;
}
noUpdate = false;
}
if (pm.Speed > 0)
{
pm.Speed -= 1;
noUpdate = false;
}
if (pm.Speed == 0 && pm.Falloff > 0)
{
pm.Falloff -= (_LEDCount > 1 ? nDecValue >> 1 : 5);
if (pm.Falloff < 0)
{
pm.Falloff = 0;
}
noUpdate = false;
}
// re-assign PeakMeterData
_meterData[i] = pm;
}
Monitor.Exit(_meterData);
if (noUpdate) // Stop timer if no more data but do not reset ID
{
StopAnimation();
}
}
/// <summary>
/// Set meter band value
/// </summary>
/// <param name="arrayValue">Array value for the bands</param>
/// <param name="offset">Starting offset position</param>
/// <param name="size">Number of values to set</param>
/// <returns></returns>
public void SetData(int[] arrayValue, int offset, int size)
{
if (arrayValue == null)
{
throw new ArgumentNullException("arrayValue");
}
if (arrayValue.Length < (offset + size))
{
throw new ArgumentOutOfRangeException("arrayValue");
}
if (_animationTimer == null)
{
throw new InvalidOperationException("Peak meter must have been started before setting data.");
}
if (InvokeRequired)
{
BeginInvoke((Action <int[], int, int>)SetData, arrayValue, offset, size);
return;
}
Monitor.Enter(this._meterData);
int maxIndex = offset + size;
for (int i = offset; i < maxIndex; i++)
{
if (i < this._meterData.Length)
{
PeakMeterData pm = this._meterData[i];
pm.Value = Math.Min(arrayValue[i], this._MaxRangeValue);
pm.Value = Math.Max(pm.Value, 0);
if (pm.Falloff < pm.Value)
{
pm.Falloff = pm.Value;
pm.Speed = this._FalloffSpeed;
}
_meterData[i] = pm;
}
}
Monitor.Exit(_meterData);
// check that timer should be restarted
if (!_animationTimer.Enabled)
{
_animationTimer.Start();
}
else
{
Refresh();
}
}