Win10等待控件

原文的地址:https://www.codeproject.com/Articles/648664/Win-ProgressRing-Control

最终的效果：

自己画的原理图：

下面需要用到的字段名称

        const double Indicators_Offet = 11.25; //每个指示器中间的间隔
        const int Control_Height = 100;        //默认的控件高度
        const int Control_Offset = 20;         
        const int Indicator_Size = 6;           //制丝器的数量
        const double Start_At = 120.0;          //开始的角度
        //三角函数数组
        double[] sine = new double[1440];
        double[] cosine = new double[1440];
        Indicator[] indicators = new Indicator[Indicator_Size]
        System.Timers.Timer time = null;
           int indicator_diameter = 0; //指示器的直径
        int indicator_radius = 0; //指示器的半径
        int outer_radius = 0;     //外半径
        int inner_radius = 0;     //内半径
        int indicator_center_radius = 0; //两个圆心的距离

方法：

        public Win10Process()
        {
            InitializeComponent();
            initialize_trigonometry_tables();
            adjust_control_dimensions_from_height(Control_Height);
            initialize_indicators();

            time = new System.Timers.Timer();
            this.time.Elapsed += new ElapsedEventHandler(tick);
            time.Interval = 100.0;
            time.Enabled = true;            
        }

        private void Win10Process_Paint(object sender, PaintEventArgs e)
        {
            Graphics graphics = e.Graphics;
            draw_background_graphic( graphics);
        }

方法2：

        void initialize_trigonometry_tables() 
        {
            for (int i = 0; i < sine.Length; i++)
            {
                double degree = i * 0.25;
                double radian = CovertRadian(degree);

                cosine[i] = Math.Cos(radian);
                sine[i] = Math.Sin(radian);
            }
        }        
        void adjust_control_dimensions_from_height(int height)
        {
            indicator_radius = height / Control_Offset;//半径
            indicator_diameter = indicator_radius * 2; //直径


            int control_height = indicator_radius * Control_Offset; //经过修改过之后的高度
            int control_width  = control_height;    //经过修改之后的宽度

            outer_radius = control_height / 2;
            inner_radius = outer_radius - indicator_diameter;

            indicator_center_radius = outer_radius - indicator_radius;


            this.Height = control_height;
            this.Width = control_width;
        }

        //初始化指示器
        void initialize_indicators() 
        {
            double degree = Start_At;
            for (int i = 0; i < Indicator_Size; i++)
            {
                indicators[i] = new Indicator(degree);
                if (degree < 0)
                {
                    degree += 360;
                }
                degree -= Indicators_Offet;
            }
        }

       void draw_background_graphic(Graphics graphics)
        {

            Rectangle rect = new Rectangle();
            Brush brush = new SolidBrush(Color.Red);

            for (int i = 0; i < Indicator_Size; i++)
            {
                double degree = indicators[i].Degree;
                if (degree < 0)
                {
                    
                }

                int dx = indicator_center_radius + round(indicator_center_radius * cos(degree));
                int dy = indicator_center_radius - round(indicator_center_radius * sin(degree));

                rect.Size = new Size(indicator_diameter, indicator_diameter);
                rect.Location = new Point(dx, dy);
               // graphics.DrawLine(Pens.Red, 0,100,dx,dy);

                graphics.FillEllipse(brush, rect);
                degree -= Indicators_Offet * indicators[i].Fast;


                if (indicators[i].Fast > 1.0)
                {
                    indicators[i].Fast += 0.25;
                }
                if (degree < 0.0)
                {
                    degree += 360;
                    indicators[i].Fast = 1.25;
                }
                else if (degree < Start_At)
                {
                   indicators[i].Fast = 1.0;

                }
                indicators[i].Degree = degree;
            }
            brush.Dispose();

        }

小函数：

      int round( double value)
        {
            return (int)(value + 0.5);
        }
        double cos(double degree)
        {
            int index = round(degree / 0.25);
            return cosine[index];
        }
        double sin(double degree)
        {
            int index = round(degree / 0.25);
            return sine[index];
        }
        //转化为弧
        double CovertRadian( double degree) 
        {
            return Math.PI * degree / 180;
        }

源代码下载的地址：

https://download.csdn.net/download/wangtiewei/10375895

备注： 

double INDICATOR_OFFSET = 11.25

圆可以分为4个象限，每个象限可以分为8个指示器， 90/8 = 11.25。 为什么是除以8而不是除以6呢？ 代码画出来的效果是6个指示器。因为如果是除以6的话，圆点之间的距离就会按着比较近。