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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.Timers;
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using System.ComponentModel;
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using System.Diagnostics;
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namespace Implab.Fx
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{
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public delegate void AnimationStep<T>(T target, int elapsed, int duration);
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public class Animation<TArg> where TArg: class
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{
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int m_duration;
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int m_delay;
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int m_elapsed;
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int m_prevTicks;
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TArg m_arg;
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ISynchronizeInvoke m_syncronizationObject;
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public event AnimationStep<TArg> Step;
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Promise<TArg> m_promise;
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public Animation(TArg target, int duration, int delay)
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{
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if (duration <= 0)
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throw new ArgumentOutOfRangeException("duration");
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if (delay <= 0)
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throw new ArgumentOutOfRangeException("delay");
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m_arg = target;
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m_syncronizationObject = target as ISynchronizeInvoke;
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m_duration = duration;
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m_delay = delay;
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m_promise = new Promise<TArg>();
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}
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public Animation(TArg target)
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: this(target, 500, 30)
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{
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}
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public TArg Traget
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{
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get { return m_arg; }
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}
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public Promise<TArg> Play()
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{
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var timer = new Timer(m_delay);
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timer.AutoReset = true;
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timer.SynchronizingObject = m_syncronizationObject;
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timer.Elapsed += new ElapsedEventHandler(timer_Elapsed);
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m_prevTicks = Environment.TickCount;
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timer.Start();
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return m_promise;
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}
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void timer_Elapsed(object sender, ElapsedEventArgs args)
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{
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var timer = sender as Timer;
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var dt = Environment.TickCount - m_prevTicks;
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m_prevTicks = Environment.TickCount;
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m_elapsed += dt;
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if (m_elapsed > m_duration)
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m_elapsed = m_duration;
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try
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{
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var handler = Step;
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if (handler != null)
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handler(m_arg, m_elapsed, m_duration);
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}
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catch (Exception e)
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{
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Trace.TraceError(e.ToString());
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}
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if (m_elapsed < m_duration)
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timer.Start();
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else
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{
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timer.Dispose();
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m_promise.Resolve(m_arg);
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}
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}
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}
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}
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