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1 using System;
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2 using System.Collections.Generic;
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3 using System.Linq;
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4 using System.Text;
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5 using System.Windows.Forms;
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6 using System.Diagnostics;
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7
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8 namespace Implab.Fx
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9 {
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10 public static class AnimationHelpers
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11 {
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12 public static Animation<TTarget> AnimateProperty<TTarget,TVal>(this Animation<TTarget> animation, Action<TTarget,TVal> setter, Func<TTarget,TVal> getter, TVal newValue, Func<TVal,TVal,int,int,TVal> fx) where TTarget: class
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13 {
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14 if (animation == null)
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15 throw new ArgumentNullException("animation");
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16
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17 TVal oldValue = getter(animation.Traget);
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18
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19 animation.Step += (target, elaped, duration) =>
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20 {
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21 var value = fx(oldValue, newValue, elaped, duration);
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22 setter(target, value);
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23 };
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24
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25 return animation;
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26 }
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27
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28 public static Animation<Form> AnimateTransparency(this Form ctl, float newValue)
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29 {
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30 var anim = new Animation<Form>(ctl);
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31
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32 anim.AnimateProperty(
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33 (target, value) => target.Opacity = value,
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34 target => target.Opacity,
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35 newValue,
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36 (ov, nv, el, du) => ov + ((float)el / du) * (nv - ov)
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37 );
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38 return anim;
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39 }
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40 }
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41 }
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