animatectl.cs

介于在网上没有相关的完整实例可供参考

using System;
using System.Windows.Forms;
using System.Drawing;
using System.Drawing.Imaging;

namespace gifTest
{
    public class AnimateCtl : System.Windows.Forms.Control
    {
        System.Windows.Forms.Timer fTimer = null;    //创建一个Time类对象fTime
        protected Graphics graphics = null;    //前台绘图表面
        private int loopCount =0;    //定义动画循环控制变量
        private int loopCounter = 0;    //定义停止动画循环变量
        private int count = 0;    //定义动画宽度
        private int currentFrame = 0;    //定义动画帧变量
        
        // 动画类构造方法
        public AnimateCtl()
        {
            //缓存 Graphics 对象
            this.graphics = this.CreateGraphics();
            //实例化 Timer
            fTimer = new System.Windows.Forms.Timer();
            //与 Timer 的 Tick 事件挂钩
            fTimer.Tick += new System.EventHandler(this.timer1_Tick);

        }

        private Bitmap bitmap;
        public Bitmap Bitmap
        {
            get
            {
                return bitmap;
            }
            set
            {
                bitmap = value;
            }
        }

        private void Draw(int iframe)
        {
            //计算图形框的左边位置
            int XLocation = iframe * Width;
            Rectangle rect = new Rectangle(XLocation, 0, Width,Height);
            //绘制图像 
            graphics.DrawImage(bitmap, 0, 0, rect, GraphicsUnit.Pixel);
        }

        public void StartAnimation(int frWidth, int DelayInterval, int LoopCount)
        {
            Width = frWidth;
            //循环次数
            loopCount = LoopCount;
            //重置循环计数器
            loopCounter = 0;
            //计算 count
            count = bitmap.Width / Width;
            Height = bitmap.Height;
            //向计时器指定延迟间隔
            fTimer.Interval = DelayInterval;
            //启动计时器
            fTimer.Enabled = true;
        }

        private void timer1_Tick(object sender, System.EventArgs e)
        {
            if (loopCount == -1)      //不停地循环
            {
                this.DrawFrame();
            }
            else
            {
                if (loopCount == loopCounter) //停止动画
                    fTimer.Enabled = false;
                else
                    this.DrawFrame();
            }
        }
        private void DrawFrame()
        {
            if (currentFrame < count - 1)
            {
                //移到下一个帧
                currentFrame++;
            }
            else
            {
                //递增 loopCounter
                loopCounter++;
                currentFrame = 0;
            }
            Draw(currentFrame);
        }

        //动画停止方法
        public void StopAnimation()
        {
            fTimer.Enabled = false;
        }
    }
}