BExplorer.Shell.ShellComboBox.m_Combo_DrawItem C# (CSharp) Method

m_Combo_DrawItem() private method

private m_Combo_DrawItem ( object sender, DrawItemEventArgs e ) : void
sender object
e System.Windows.Forms.DrawItemEventArgs
return void
        void m_Combo_DrawItem(object sender, DrawItemEventArgs e)
        {
            int iconWidth = SystemInformation.SmallIconSize.Width;
            int indent = ((e.State & DrawItemState.ComboBoxEdit) == 0) ? (iconWidth / 2) : 0;

            if (e.Index != -1)
            {
                string display;
                ComboItem item = (ComboItem)m_Combo.Items[e.Index];
                Color textColor = SystemColors.WindowText;
                Rectangle textRect;
                int textOffset;
                SizeF size;

                if ((e.State & DrawItemState.ComboBoxEdit) != 0)
                {
                    // Don't draw the folder location in the edit box when
                    // the control is Editable as the edit control will
                    // take care of that.
                    display = m_Editable ? string.Empty : GetEditString();
                }
                else
                {
                    display = item.Folder.DisplayName;
                }

                size = TextRenderer.MeasureText(display, m_Combo.Font);

                textRect = new Rectangle(e.Bounds.Left + iconWidth + (item.Indent * indent) + 3, e.Bounds.Y, (int)size.Width, e.Bounds.Height);
                textOffset = (int)((e.Bounds.Height - size.Height) / 2);

                // If the text is being drawin in the main combo box edit area,
                // draw the text 1 pixel higher - this is how it looks in Windows.
                if ((e.State & DrawItemState.ComboBoxEdit) != 0)
                {
                    textOffset -= 1;
                }

                if ((e.State & DrawItemState.Selected) != 0)
                {
                    e.Graphics.FillRectangle(SystemBrushes.Highlight, textRect);
                    textColor = SystemColors.HighlightText;
                }
                else
                {
                    e.DrawBackground();
                }

                if ((e.State & DrawItemState.Focus) != 0)
                {
                    ControlPaint.DrawFocusRectangle(e.Graphics, textRect);
                }

                SystemImageList.DrawSmallImage(
                    e.Graphics,
                    new Point(e.Bounds.Left + (item.Indent * indent), e.Bounds.Top),
                    item.Folder.GetSystemImageListIndex(ShellIconType.SmallIcon,
                    ShellIconFlags.OverlayIndex),
                    (e.State & DrawItemState.Selected) != 0
                );

                TextRenderer.DrawText(e.Graphics, display, m_Combo.Font, new Point(textRect.Left, textRect.Top + textOffset), textColor);
            }
        }