コード例 #1
0
        /// <summary>
        /// Overriden draw method that doesn't allow highlighting of the selected item since that obscures the item's text color which has desired meaning.  But the
        /// selected item is still known to the user by the focus rectangle being displayed.
        /// </summary>
        /// <param name="e"></param>
        protected override void OnDrawItem(DrawItemEventArgs e)
        {
            if (this.DesignMode)
            {
                base.OnDrawItem(e);
            }
            else
            {
                if (e.Index == -1)
                {
                    return;
                }
                Color textColor = this.GetItemCheckState(e.Index) == CheckState.Unchecked ? UncheckedColor : (this.GetItemCheckState(e.Index) == CheckState.Checked ? CheckedColor : IndeterminateColor);

                DrawItemEventArgs e2 = new DrawItemEventArgs
                                           (e.Graphics,
                                           e.Font,
                                           new Rectangle(e.Bounds.Location, e.Bounds.Size),
                                           e.Index,
                                           (e.State & DrawItemState.Focus) == DrawItemState.Focus ? DrawItemState.Focus : DrawItemState.None, /* Remove 'selected' state so that the base.OnDrawItem doesn't obliterate the work we are doing here. */
                                           textColor,
                                           this.BackColor);

                base.OnDrawItem(e2);
                e2.Dispose();
            }
        }