private void FlagSearchMatches()
{
if (string.IsNullOrEmpty(SearchTerm))
{
foreach (XukSpineItemWrapper wrapper in XukSpineItems)
{
wrapper.SearchMatch = false;
}
return;
}
bool atLeastOneFound = false;
foreach (XukSpineItemWrapper wrapper in XukSpineItems)
{
bool found = !string.IsNullOrEmpty(wrapper.FullDescription)
&& wrapper.FullDescription.IndexOf(SearchTerm, StringComparison.OrdinalIgnoreCase) >= 0;
wrapper.SearchMatch = found;
if (found)
{
atLeastOneFound = true;
}
}
if (atLeastOneFound)
{
XukSpineItemWrapper sw = FindNext(false);
if (sw == null)
{
sw = FindPrevious(false);
}
}
}
private XukSpineItemWrapper FindNextSetting()
{
ICollectionView dataView = CollectionViewSource.GetDefaultView(XukSpineItemsList.ItemsSource);
IEnumerator enumerator = dataView.GetEnumerator();
XukSpineItemWrapper firstMatch = null;
while (enumerator.MoveNext())
{
var current = (XukSpineItemWrapper)enumerator.Current;
if (current.SearchMatch && firstMatch == null)
{
firstMatch = current;
}
if (!current.IsSelected)
{
continue;
}
// from here we know we are after the selected item
while (enumerator.MoveNext())
{
current = (XukSpineItemWrapper)enumerator.Current;
if (current.SearchMatch)
{
return current; // the first match after the selected item
}
}
return null; // no match after => we don't cycle
}
return firstMatch; // no selection => first one that matched, if any
}
private XukSpineItemWrapper FindPrevious(bool select)
{
XukSpineItemWrapper previousMatch = FindPrevSetting();
if (previousMatch != null)
{
if (select)
{
previousMatch.IsSelected = true;
}
else
{
var listItem = VisualLogicalTreeWalkHelper.FindObjectInVisualTreeWithMatchingType<ListViewItem>(
XukSpineItemsList,
child =>
{
object dc = child.GetValue(FrameworkElement.DataContextProperty);
return dc != null && dc == previousMatch;
});
if (listItem != null)
{
listItem.BringIntoView();
}
}
}
else
{
AudioCues.PlayBeep();
}
return previousMatch;
}
private XukSpineItemWrapper FindPrevSetting()
{
ICollectionView dataView = CollectionViewSource.GetDefaultView(XukSpineItemsList.ItemsSource);
IEnumerator enumerator = dataView.GetEnumerator();
XukSpineItemWrapper lastMatch = null;
while (enumerator.MoveNext())
{
var current = (XukSpineItemWrapper)enumerator.Current;
if (current.IsSelected)
{
return lastMatch;
}
if (current.SearchMatch)
{
lastMatch = current;
}
}
return lastMatch;
}
