AGS.Editor.Utilities.IsControlPressed C# (CSharp) Метод

        public static bool IsControlPressed()
        {
            return (System.Windows.Forms.Control.ModifierKeys & Keys.Control) == Keys.Control;
        }

        private void palettePanel_MouseDown(object sender, MouseEventArgs e)
        {
            if ((e.X > 30) && (e.X < 30 + 16 * 20) && (e.Y > 0) && (e.Y < 16 * 20))
            {
                int selectedIndex = (e.X - 30) / 20 + (e.Y / 20) * 16;

                if (e.Button == MouseButtons.Right)
                {
                    ShowContextMenu(selectedIndex, e.Location);
                }
                else if (Utilities.IsControlPressed())
                {
                    ToggleColourSelected(selectedIndex);
                }
                else if (Utilities.IsShiftPressed())
                {
                    AddRangeToSelection(selectedIndex);
                }
                else
                {
                    _selectedIndexes.Clear();
                    _selectedIndexes.Add(selectedIndex);
                }

                UpdatePropertyGrid();
                palettePanel.Invalidate();
            }
        }