Alsing.Windows.Forms.CoreLib.SplitViewControl.Center_MouseMove C# (CSharp) Метод

        private void Center_MouseMove(object sender, MouseEventArgs e)
        {
            if (Action == SizeAction.SizeA && e.Button == MouseButtons.Left)
            {
                Point start;
                int x = e.X - Center.Width/2;
                int y = e.Y - Center.Height/2;

                // ROB: Added fix for graphics splatter when sizing both splitters.
                if (y + Horizontal.Top > Height - 4)
                    y = Height - 4 - Horizontal.Top;
                if (y + Horizontal.Top < 0)
                    y = 0 - Horizontal.Top;

                if (x + Vertical.Left > Width - 4)
                    x = Width - 4 - Vertical.Left;
                if (x + Vertical.Left < 0)
                    x = 0 - Vertical.Left;
                // END-ROB


                if (!FirstTime)
                {
                    start = PointToScreen(Location);
                    start.X += PrevPos.X + Vertical.Location.X;
                    ControlPaint.FillReversibleRectangle(new Rectangle(start.X, start.Y, 3, Height), Color.Black);

                    start = PointToScreen(Location);
                    start.Y += PrevPos.Y + Horizontal.Location.Y;
                    ControlPaint.FillReversibleRectangle(new Rectangle(start.X, start.Y, Width, 3),
                                                         SystemColors.ControlDark);
                }
                else
                    FirstTime = false;

                start = PointToScreen(Location);
                start.X += x + Vertical.Location.X;
                ControlPaint.FillReversibleRectangle(new Rectangle(start.X, start.Y, 3, Height), Color.Black);

                start = PointToScreen(Location);
                start.Y += y + Horizontal.Location.Y;
                ControlPaint.FillReversibleRectangle(new Rectangle(start.X, start.Y, Width, 3), SystemColors.ControlDark);


                PrevPos = new Point(x, y);
            }
        }