private void UpdateLowerValue(double value)
{
CoercedValues cv = this.GetCoercedValues();
double newValue = Math.Max(cv.Minimum, Math.Min(cv.Maximum, value));
newValue = Math.Min(newValue, cv.HigherValue);
this.SetLowerSliderValues(newValue, null, null);
this.LowerValue = newValue;
}
private void UpdateHigherValue(double?value)
{
CoercedValues cv = this.GetCoercedValues();
double newValue = Math.Max(cv.Minimum, Math.Min(cv.Maximum, value.HasValue ? value.Value : 0d));
newValue = Math.Max(newValue, cv.LowerValue);
this.SetHigherSliderValues(newValue, null, null);
this.HigherValue = newValue;
}
private void HigherSlider_ValueChanged(object sender, RoutedPropertyChangedEventArgs <double> e)
{
if (_higherSlider.IsLoaded)
{
CoercedValues cv = this.GetCoercedValues();
double newValue = Math.Max(cv.Minimum, Math.Min(cv.Maximum, e.NewValue));
newValue = Math.Max(newValue, cv.LowerValue);
this.SetHigherSliderValues(newValue, null, null);
this.HigherValue = newValue;
}
}
private CoercedValues GetCoercedValues()
{
CoercedValues cv = new CoercedValues();
cv.Minimum = Math.Min(this.Minimum, this.Maximum);
cv.Maximum = Math.Max(cv.Minimum, this.Maximum);
cv.LowerValue = Math.Max(cv.Minimum, Math.Min(cv.Maximum, this.LowerValue));
cv.HigherValue = Math.Max(cv.Minimum, Math.Min(cv.Maximum, this.HigherValue));
cv.HigherValue = Math.Max(cv.LowerValue, cv.HigherValue);
return(cv);
}
private void HigherRange_Click(object sender, RoutedEventArgs e)
{
CoercedValues cv = this.GetCoercedValues();
//When Maximum is not greater than Minimum, the
//slider display is in an inconsistant state. Don't
//consider any operation from the user
if (cv.Minimum < cv.Maximum)
{
double newValue = cv.HigherValue + this.Step;
this.HigherValue = Math.Min(cv.Maximum, Math.Max(cv.Minimum, newValue));
}
}
private void AdjustView()
{
//Coerce values to make them consistent.
CoercedValues cv = this.GetCoercedValues();
double actualWidth = 0;
double lowerSliderThumbWidth = 0d;
double higherSliderThumbWidth = 0d;
if (this.Orientation == Orientation.Horizontal)
{
actualWidth = this.ActualWidth;
lowerSliderThumbWidth = RangeSlider.GetThumbWidth(_lowerSlider);
higherSliderThumbWidth = RangeSlider.GetThumbWidth(_higherSlider);
}
else if (this.Orientation == Orientation.Vertical)
{
actualWidth = this.ActualHeight;
lowerSliderThumbWidth = RangeSlider.GetThumbHeight(_lowerSlider);
higherSliderThumbWidth = RangeSlider.GetThumbHeight(_higherSlider);
}
actualWidth -= (lowerSliderThumbWidth + higherSliderThumbWidth);
this.SetLowerSliderValues(cv.LowerValue, cv.Minimum, cv.Maximum);
this.SetHigherSliderValues(cv.HigherValue, cv.Minimum, cv.Maximum);
double entireRange = cv.Maximum - cv.Minimum;
if (entireRange > 0)
{
this.HigherRangeWidth = (actualWidth * (cv.Maximum - cv.HigherValue)) / entireRange;
this.RangeWidth = (actualWidth * (cv.HigherValue - cv.LowerValue)) / entireRange;
this.LowerRangeWidth = (actualWidth * (cv.LowerValue - cv.Minimum)) / entireRange;
}
else
{
this.HigherRangeWidth = 0d;
this.RangeWidth = 0d;
this.LowerRangeWidth = actualWidth;
}
}
private CoercedValues GetCoercedValues()
{
CoercedValues cv = new CoercedValues();
cv.Minimum = Math.Min( this.Minimum, this.Maximum );
cv.Maximum = Math.Max( cv.Minimum, this.Maximum );
cv.LowerValue = Math.Max( cv.Minimum, Math.Min( cv.Maximum, this.LowerValue ) );
cv.HigherValue = Math.Max( cv.Minimum, Math.Min( cv.Maximum, this.HigherValue ) );
cv.HigherValue = Math.Max( cv.LowerValue, cv.HigherValue );
return cv;
}
