public void CommandChangeOpacityTest()
{
Pentagon pentagon = new Pentagon();
double opacity = 7;
double expectedOpacity = pentagon.Opacity;
UndoRedoManager undoRedoManager = new UndoRedoManager();
ChangeOpacity changeOpacity = new ChangeOpacity(pentagon, opacity);
undoRedoManager.Execute(changeOpacity);
Assert.AreEqual(pentagon.Opacity, opacity);
undoRedoManager.Undo();
Assert.AreEqual(pentagon.Opacity, expectedOpacity);
}
private void FadeStep()
{
switch (state)
{
case FadingState.Show:
if (!visible)
{
visible = true;
Show?.Invoke();
opacity = 0;
ChangeOpacity?.Invoke(this, opacity);
}
else if (opacity < ShownMinus)
{
opacity += StepIn;
ChangeOpacity?.Invoke(this, opacity);
}
else if (opacity != Shown)
{
opacity = Shown;
ChangeOpacity?.Invoke(this, Shown);
StartStopTimer(FadingState.Idle);
}
break;
case FadingState.ShowTransparent:
if (!visible)
{
visible = true;
Show?.Invoke();
opacity = 0;
ChangeOpacity?.Invoke(this, opacity);
}
else if (opacity < TransparentMinus)
{
opacity += StepIn;
ChangeOpacity?.Invoke(this, opacity);
}
else if (opacity > TransparentPlus)
{
opacity -= StepOut;
ChangeOpacity?.Invoke(this, opacity);
}
else if (opacity != Transparent)
{
ChangeOpacity?.Invoke(this, Transparent);
StartStopTimer(FadingState.Idle);
}
break;
case FadingState.Hide:
if (opacity > StepOut)
{
opacity -= StepOut;
ChangeOpacity?.Invoke(this, opacity);
}
else if (visible)
{
opacity = 0;
ChangeOpacity?.Invoke(this, opacity);
visible = false;
Hide?.Invoke();
StartStopTimer(FadingState.Idle);
}
break;
case FadingState.Idle:
default:
StartStopTimer(FadingState.Idle);
break;
}
}