How to Scroll Multiple Items with Page Up and Down
Environment
| Product Version | 2020.3.817 |
| Product | RadAutoCompleteBox for WPF |
Description
How to enable the scrolling of multiple items using the Page Up and Page Down keys.
Solution
As of version 2020.3.817 the RadAutoCompleteBox exposes a protected HighlightedIndex property which can be used to set the highlighted item. This property can be used in the HandleKeyDown method of the control to enable custom keyboard navigation with the Page Up and Page Down keys.
public class CustomAutoCompleteBox : RadAutoCompleteBox
{
protected override bool HandleKeyDown(Key systemKey)
{
if (systemKey == Key.PageDown)
{
this.HighlightedIndex += 10;
return true;
}
if (systemKey == Key.PageUp)
{
this.HighlightedIndex -= 10;
return true;
}
return base.HandleKeyDown(systemKey);
}
}