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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Windows.Forms;
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using System.Diagnostics;
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namespace Implab.Fx
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{
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public static class AnimationHelpers
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{
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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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{
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if (animation == null)
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throw new ArgumentNullException("animation");
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TVal oldValue = getter(animation.Traget);
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animation.Step += (target, elaped, duration) =>
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{
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var value = fx(oldValue, newValue, elaped, duration);
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setter(target, value);
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};
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return animation;
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}
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public static Animation<T> AnimateTransparency<T>(this T ctl, float newValue) where T : Form
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{
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var anim = new Animation<T>(ctl);
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anim.AnimateProperty(
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(target, value) => target.Opacity = value,
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target => target.Opacity,
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newValue,
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(ov, nv, el, du) => ov + ((float)el / du) * (nv - ov)
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);
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return anim;
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}
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public static Promise<T> CloseFadeOut<T>(this T ctl) where T : Form
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{
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var anim = ctl.AnimateTransparency(0);
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return anim.Play().DispatchToControl(ctl).Then(frm => frm.Close());
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}
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public static Promise<T> OverlayFadeIn<T>(this Form that, T overlay) where T : Form
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{
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if (that == null)
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throw new ArgumentNullException("that");
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if (overlay == null)
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throw new ArgumentNullException("overlay");
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// setup overlay
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overlay.Opacity = 0;
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overlay.FormBorderStyle = FormBorderStyle.None;
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overlay.ShowInTaskbar = false;
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that.AddOwnedForm(overlay);
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EventHandler handler = (object sender, EventArgs args) =>
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{
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overlay.Bounds = that.RectangleToScreen(that.ClientRectangle);
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};
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// attach handlers
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that.Move += handler;
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that.Resize += handler;
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that.Shown += handler;
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// remove handlers to release overlay
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overlay.FormClosed += (sender, args) =>
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{
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that.Move -= handler;
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that.Resize -= handler;
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that.Shown -= handler;
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};
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overlay.Show(that);
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overlay.Bounds = that.RectangleToScreen(that.ClientRectangle);
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return overlay
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.AnimateTransparency(1)
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.Play()
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.DispatchToControl(overlay);
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}
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}
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}
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