Animating Fill Colour

Aspose.Slides Product Family
1

The documentation on animation on PPTX is really, really, lacking.

We're trying to animate a point from A to B, which must change colour depending on where it ends up.

Animating the motion path is ok :

EffectEx fxUserPath = pres.Slides[0].Timeline.MainSequence.AddEffect(circle, EffectTypeEx.PathUser, EffectSubtypeEx.None, EffectTriggerTypeEx.OnClick);

//Now extract the behaviour we just added

MotionEffectEx motionBhv = ((MotionEffectEx)fxUserPath.Behaviors[0]);

PointF[] pts = new PointF[1];

.....

motionBhv.Path.Add(MotionCommandPathTypeEx.LineTo, pts, MotionPathPointsTypeEx.Auto, true);

motionBhv.Path.Add(MotionCommandPathTypeEx.End, null, MotionPathPointsTypeEx.Auto, false);

The problem is then how to do the animation of color....

I'm GUESSING that I need to do something like this first :

EffectEx colourChange = pres.Slides[0].Timeline.MainSequence.AddEffect(circle, EffectTypeEx.ChangeFillColor, EffectSubtypeEx.None, EffectTriggerTypeEx.WithPrevious);

i.e. to say that I want to animate a "ChangeFillColor" and that it should happend "WithPrevious" i.e. at the same time as the move effect.

I GUESS that I should now extract something from "colourChange" which will let me determine what the fill colour should change to... something like EffectFillTypeEx, but I do not understand HOW.

Please enlighten us how better to use these (hopefully) powerful features you have build into Aspose.

2

For anybody wondering how to do this... forget using the documentation and turn to inspection by debugging ;-)

EffectEx colourChange = pres.Slides[0].Timeline.MainSequence.AddEffect(circle, EffectTypeEx.ChangeFillColor, EffectSubtypeEx.None, EffectTriggerTypeEx.WithPrevious);

ColorEffectEx colourEffect = (colourChange.Behaviors[0] as ColorEffectEx);

colourEffect.From.Color = Color.Black;

colourEffect.To.Color = Color.Red;