public void SlopeChanged_To_String_Test()
{
SlopeChanged sChanged = new SlopeChanged();
string expected = string.Format("Delta: 0, NewSlope: 0");
Assert.AreEqual(expected, sChanged.ToString());
}
public void SlopeChanged_Nothing_Set_Test()
{
SlopeChanged sChanged = new SlopeChanged();
int expectedSlope = 0;
int expectedDelta = 0;
Assert.IsTrue(expectedSlope == sChanged.NewSlope);
Assert.IsTrue(expectedDelta == sChanged.NewSlope);
}
public void SlopeChanged_NewSlope_GetterSetter_Test()
{
SlopeChanged sChanged = new SlopeChanged()
{
NewSlope = 3
};
int expected = 3;
Assert.AreEqual(expected, sChanged.NewSlope);
}
public void SlopeChanged_Delta_GetterSetter_Test()
{
SlopeChanged sChanged = new SlopeChanged()
{
Delta = 4
};
int expected = 4;
Assert.AreEqual(expected, sChanged.Delta);
}
public IReturnType Calculate(ValidSetOfTouchPoints set)
{
SlopeChanged sc = new SlopeChanged();
if (set.Count != 2)
throw new InvalidDataSetException("Slope can only be calculated for two touch points!");
// Calculate current slope
sc.NewSlope = TrigonometricCalculationHelper.GetSlopeBetweenPoints(set[0].Position, set[1].Position) * 180 / 3.14;
// Check if enough history data is available
if (set[0].Stroke.StylusPoints.Count > 1 && set[1].Stroke.StylusPoints.Count > 1)
{
// Calculate slope for last position
double prevSlope = TrigonometricCalculationHelper.GetSlopeBetweenPoints(
set[0].Stroke.StylusPoints[set[0].Stroke.StylusPoints.Count - 2],
set[1].Stroke.StylusPoints[set[1].Stroke.StylusPoints.Count - 2]) * 180 / 3.14;
sc.Delta = sc.NewSlope - prevSlope;
}
return sc;
}
