ImageGlass.frmMain.mnuMainWindowAdaptImage_Click C# (CSharp) Method

        private void mnuMainWindowAdaptImage_Click(object sender, EventArgs e)
        {
            if (picMain.Image == null)
            {
                return;
            }

            Rectangle screen = Screen.FromControl(this).WorkingArea;
            WindowState = FormWindowState.Normal;

            //if image size is bigger than screen
            if (picMain.Image.Width >= screen.Width || picMain.Height >= screen.Height)
            {
                Left = Top = 0;
                Width = screen.Width;
                Height = screen.Height;
            }
            else
            {
                Size = new Size(Width += picMain.Image.Width - picMain.Width,
                                Height += picMain.Image.Height - picMain.Height);

                picMain.Bounds = new Rectangle(Point.Empty, picMain.Image.Size);
                Top = (screen.Height - Height) / 2 + screen.Top;
                Left = (screen.Width - Width) / 2 + screen.Left;
            }
        }