Steema Central

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Steema.TeeChart.TChart tChart1 = new Steema.TeeChart.TChart();
        Steema.TeeChart.Styles.FastLine line1 = new Steema.TeeChart.Styles.FastLine();
        Steema.TeeChart.Styles.FastLine line2 = new Steema.TeeChart.Styles.FastLine();
        private bool clicked;
        private int origX, origY, X, Y, Index;
        Bitmap bitmap;

        public Form1()
        {
            InitializeComponent();
            this.Controls.Add(tChart1);
            tChart1.Dock = DockStyle.Fill;
            tChart1.Aspect.View3D = false;
            tChart1.Zoom.Allow = false;
            tChart1.Series.Add(line1);
            tChart1.Series.Add(line2);
            tChart1.MouseMove +=new MouseEventHandler(tChart1_MouseMove);
            tChart1.MouseUp +=new MouseEventHandler(tChart1_MouseUp);

            line1.FillSampleValues(600000);
            line2.FillSampleValues(600000);

            for (int i = 0; i < tChart1.Series.Count; i++)
            {
                tChart1[i].Click += new MouseEventHandler(Series_Click);
            }
        }

        // user clickes on a series
        void Series_Click(object sender, MouseEventArgs e)
        {
            SetClicked(e.X, e.Y, tChart1.Series.IndexOf(sender as Steema.TeeChart.Styles.Series));
        }

        // create thread to create a bitmap of this series
        private void SetClicked(int X, int Y, int i)
        {
            clicked = true;
            origX = X;
            origY = Y;
            if (i != Index)
            {
                bitmap = null;
                Index = i;
            }
            if (bitmap == null)
            {
                System.Threading.Thread ta = new System.Threading.Thread(delegate()
                            {
                                CreateBitmap();
                            });

                ta.IsBackground = true;
                ta.Start();
            }
        }

        // create a bitmap of the current selected series
        private void CreateBitmap()
        {
            Bitmap tempBitmap = new Bitmap((int)(tChart1.Width - tChart1.Panel.MarginLeft - tChart1.Panel.MarginRight), (int)(tChart1.Height - tChart1.Panel.MarginTop - tChart1.Panel.MarginBottom));
            Graphics g = Graphics.FromImage(tempBitmap);

            Steema.TeeChart.Styles.Series s = tChart1[Index];
            Pen pen = new Pen(s.Color);
            for (int j = 0; j < s.Count - 1; j++)
            {
                Point p0 = new Point(s.CalcXPos(j), s.CalcYPos(j));
                Point p1 = new Point(s.CalcXPos(j + 1), s.CalcYPos(j + 1));
                g.DrawLine(pen, p0, p1);
            }

            bitmap = tempBitmap;            
        }

        private void tChart1_MouseMove(object sender, MouseEventArgs e)
        {
            if (clicked)
            {
                X = e.X;
                Y = e.Y;
                if (bitmap != null)
                {
                    tChart1.Graphics3D.BackBuffer.Render(); // draw the chart without the dragged and moved series (bitmap)
                    tChart1.Graphics3D.Draw(X - origX, Y - origY, bitmap); // draw the bitmap of the selected series                    
                }
            }
        }

        // user drops a series
        private void tChart1_MouseUp(object sender, MouseEventArgs e)
        {
            clicked = false;
            if (X != origX || Y != origY)
            {
                System.Threading.Thread ta = new System.Threading.Thread(delegate()
                               {
                                   MoveChart();
                               });

                ta.IsBackground = true;
                ta.Start();
            }
        }

        // move each point with the new offset
        private void MoveChart()
        {
            double xDiff = tChart1.Axes.Bottom.CalcPosPoint(X) - tChart1.Axes.Bottom.CalcPosPoint(origX);
            double yDiff = tChart1[Index].GetVertAxis.CalcPosPoint(Y) - tChart1[Index].GetVertAxis.CalcPosPoint(origY);

            tChart1.AutoRepaint = false;
            tChart1.SuspendLayout();
            tChart1[Index].BeginUpdate();
            for (int i = 0; i < tChart1[Index].XValues.Count; i++)
            {
                tChart1[Index].XValues[i] += xDiff;
                tChart1[Index].YValues[i] += yDiff;
            }

            tChart1[Index].EndUpdate();
            tChart1.ResumeLayout();
            tChart1.AutoRepaint = true;
            tChart1.Invalidate();
        }