// Argument must be an object to allow it to be called via DeferredRequest
private void OnUpdateNextAndPreviousResults(object arg)
{
if (SearchIsActive)
{
Debug.Assert(_context != null, "ExplorerFrame was disposed");
// only recalculate Next & Previous if the user selected a different tree
// item (if they just hit Next or Previous Search Result then this will
// be calculated automatically)
if (!_nextOrPreviousInProgress)
{
// relativeToItem is the current selection (or the root node if no selection)
ExplorerEFElement relativeToItem = null;
var selectedItem = _selectedExplorerEFElement;
var relativeToSelection = (bool)arg;
if (relativeToSelection)
{
relativeToItem = selectedItem;
}
if (relativeToItem == null)
{
relativeToItem = ExplorerViewModelHelper.ViewModel.RootNode;
}
var explorerSearchResults = ExplorerSearchResults.GetExplorerSearchResults(_context);
explorerSearchResults.RecalculateNextAndPrevious(relativeToItem);
}
// update whether Next and Previous buttons are enabled
OnPropertyChanged("CanGotoNextResult");
OnPropertyChanged("CanGotoPreviousResult");
}
}
private void ResetPreviousSearchResults(bool clearTextSearch)
{
Debug.Assert(_context != null, "ExplorerFrame was disposed");
if (clearTextSearch)
{
SearchComboBox.Text = string.Empty;
}
// now reset the ExplorerSearchResults which will clear all the
// IsInSearchResults settings in the tree
var explorerSearchResults = ExplorerSearchResults.GetExplorerSearchResults(_context);
explorerSearchResults.Reset();
}
private void ProcessTreeViewItemsInSearchResults()
{
Debug.Assert(_context != null, "ExplorerFrame was disposed");
var scrollBar = GetVerticalScrollBar();
var addAdorners = scrollBar != null && scrollBar.IsVisible;
var explorerSearchResults = ExplorerSearchResults.GetExplorerSearchResults(_context);
if (addAdorners)
{
foreach (var explorerElement in explorerSearchResults.Results)
{
SearchAdornerDecorator.AddAdorner(
TreeViewAdornerLayer, SearchTicksTrack, explorerElement, this);
}
}
if (_searchExpansionInProgress || _modelChangesCommittingInProgress)
{
// update Next & Previous whether tree is being expanded because
// search was initiated by user or because model changes are being committed
OnUpdateNextAndPreviousResults(true);
// only select the Next or Previous result if search was initiated by user
if (_searchExpansionInProgress)
{
if (explorerSearchResults.CanGoToNextSearchResult)
{
OnSelectNextSearchResult();
}
else if (explorerSearchResults.CanGoToPreviousSearchResult)
{
OnSelectPreviousSearchResult();
}
else
{
// this has the side-effect of calling Focus() on the selected item
FocusExplorerEFElement(GetSelectedExplorerEFElement(), true);
}
}
}
}
private void OnSelectPreviousSearchResult()
{
Debug.Assert(_context != null, "ExplorerFrame was disposed");
try
{
_nextOrPreviousInProgress = true;
var explorerSearchResults = ExplorerSearchResults.GetExplorerSearchResults(_context);
var previousSearchResultItem = explorerSearchResults.SelectPreviousSearchResult();
if (previousSearchResultItem != null)
{
previousSearchResultItem.ExpandTreeViewToMe();
FocusExplorerEFElement(previousSearchResultItem, true);
WaitUIUpdate();
}
}
finally
{
_nextOrPreviousInProgress = false;
}
}
