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I have derived from a GridComboBoxCellRenderer, and I want to enable the mouse wheel for scrolling thru the items. I added the following code:
public override bool ProcessMouseWheel(MouseEventArgs e) { if (this.IsDroppedDown) { if (e.Delta < 0) this.ListBoxPart.TopIndex++; else this.ListBoxPart.TopIndex--; return true; } return false; }
But when I use the wheel nothing happens. During a debug session I found out, that the ListBoxPart.TopIndex++ or -- doesn't have any influence on the value - it remains 0.
