public Search()
{
InitializeComponent();
Loaded += Search_Loaded;
_selectionBackgroundBinding = new Binding("HighlightBackground");
_selectionForegroundBinding = new Binding("HighlightForeground");
_defaultForegroundBinding = new Binding("DefaultForeground");
_selectedResultsItem = null;
KeyDown += Search_KeyDown;
KeyUp += Search_KeyUp;
}
public Navigation()
{
InitializeComponent();
Loaded += Navigation_Loaded;
_selectionBackgroundBinding = new Binding("HighlightBackground");
_selectionForegroundBinding = new Binding("HighlightForeground");
_defaultForegroundBinding = new Binding("DefaultForeground");
_selectedContentsItem = null;
_resetCurrentPositionToHeading = true;
KeyDown += Navigation_KeyDown;
KeyUp += Navigation_KeyUp;
}
private void searchResultsListBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
//if(searchResultsListBox != null) //Need to focus the parent listbox
// searchResultsListBox.Focus();
if(searchResultsListBox.SelectedIndex > -1)
{
ExtendedListBoxItem currentItem = searchResultsListBox.SelectedItem as ExtendedListBoxItem;
if(currentItem != null)
{
//Remove highlighting from the previously selected item.
if(_selectedResultsItem != null)
{
_selectedResultsItem.SetBinding(ForegroundProperty, _defaultForegroundBinding);
}
currentItem.SetBinding(ForegroundProperty, _selectionForegroundBinding);
_selectedResultsItem = currentItem;
}
SearchSelected(sender, new ItemSelectedEventArgs(SearchResults[searchResultsListBox.SelectedIndex].ID));
}
}
/// <summary>
/// Updates the list of search results when the SearchResults property is set.
/// </summary>
private void PopulateSearchResults()
{
searchResultsListBox.Items.Clear();
Style listItemStyle = Application.Current.Resources[Strings.ListItemStyleKey] as Style;
if(SearchResults == null || SearchResults.Count == 0)
{
TextBlock noResults = new TextBlock();
noResults.Text = "No search results found.";
resultsHeader.Text = "Results:";
ExtendedListBoxItem newItem = new ExtendedListBoxItem();
newItem.Content = noResults;
AutomationProperties.SetHelpText(newItem, "No results found for this search, please go back and try a different search.");
searchResultsListBox.Items.Add(newItem);
if(IndicateSearchResultsChanged != null)
{
IndicateSearchResultsChanged(this, new EventArgs());
}
SelfVoicingSpeakText(this, new SpeechTextEventArgs(noResults.Text));
return;
}
//Populate the search results box
foreach(SearchResult result in SearchResults)
{
//Construct ListBoxItem from textblock of multiple runs
ExtendedListBoxItem currentItem = new ExtendedListBoxItem();
currentItem.Style = listItemStyle;
currentItem.SetBinding(ExtendedListBoxItem.SelectionBackgroundProperty, _selectionBackgroundBinding);
currentItem.SetBinding(ForegroundProperty, _defaultForegroundBinding);
TextBlock displayedResult = new TextBlock();
int currentIndex = 0;
while(currentIndex < result.Text.Length)
{
// get the next occurance of the search string in the search result
int nextSearchStringIndex = result.Text.Substring(currentIndex).ToLower().IndexOf(result.SearchString.ToLower());
if(nextSearchStringIndex == -1)
{
break;
}
// construct a run for the text leading up to the match
if(currentIndex != nextSearchStringIndex)
{
Run preSearchWord = new Run();
preSearchWord.Text = result.Text.Substring(currentIndex, nextSearchStringIndex);
displayedResult.Inlines.Add(preSearchWord);
}
//if (nextSearchStringIndex)
Run SearchWord = new Run();
SearchWord.Text = result.Text.Substring(currentIndex + nextSearchStringIndex, result.SearchString.Length);
SearchWord.FontWeight = FontWeights.Bold;
displayedResult.Inlines.Add(SearchWord);
currentIndex += (nextSearchStringIndex + result.SearchString.Length);
}
Run postSearchWord = new Run();
if(currentIndex != result.Text.Length)
{
postSearchWord.Text = result.Text.Substring(currentIndex);
displayedResult.Inlines.Add(postSearchWord);
}
displayedResult.TextWrapping = TextWrapping.Wrap;
currentItem.Content = displayedResult;
AutomationProperties.SetHelpText(currentItem, result.Text + ". Use the up and down arrow keys to scroll through the other search results.");
//We don't want to have to tab through all of the search result items, since up and down already do that
currentItem.TabNavigation = KeyboardNavigationMode.Once;
currentItem.IsTabStop = false;
searchResultsListBox.Items.Add(currentItem);
}
searchResultsListBox.InvalidateMeasure();
if(IndicateSearchResultsChanged != null)
{
IndicateSearchResultsChanged(this, new EventArgs());
}
//TODO: Distinguish plural and singular (i.e. result from results)
resultsHeader.Text = String.Format("Results: ({0} results found)", SearchResults.Count);
SelfVoicingSpeakText(this, new SpeechTextEventArgs(string.Format(Speech.ResultsFoundMessage, SearchResults.Count)));
}
/// <summary>
/// Navigate the book to the given heading index of the table of contents when a TOC heading
/// is selected.
/// </summary>
/// <remarks>NOTE: Currently there is no unwiring of this event when the TOC is updated,
/// so it may be triggered when the list is repopulated.
/// </remarks>
private void TableOfContentsListBox_SelectionChanged(object sender, SelectionChangedEventArgs args)
{
ListBox targetListBox = sender as ListBox;
if(targetListBox != null) //Need to focus the parent listbox
targetListBox.Focus();
// When the listbox is first being populated the selected item could be null.
if(targetListBox.SelectedItem != null)
{
//Remove highlightin from the previously sleected item.
if(_selectedContentsItem != null)
{
_selectedContentsItem.SetBinding(ForegroundProperty, _defaultForegroundBinding);
}
//Highlight the current item & save reference
ExtendedListBoxItem currentItem = targetListBox.SelectedItem as ExtendedListBoxItem;
currentItem.SetBinding(ForegroundProperty, _selectionForegroundBinding);
//Ensure the element is scrolled into view.
if(ParentViewer != null)
currentItem.ScrollIntoView(ParentViewer, DisplayAttributes.CommonInstance.VisualScale);
_selectedContentsItem = currentItem;
// set the selected item args to the toc id and raise event
int SelectedHeadingID = (targetListBox.SelectedIndex);
NavigateToHeadingID(SelectedHeadingID);
}
}
/// <summary>
/// Refreshes the items displayed in the Table of Contents. Called when the TOC reference is (re)set.
/// </summary>
private void PopulateTableOfContents()
{
// empty out the table of contents listbox and render new table of contents
TableOfContentsListBox.SelectedItem = null;
TableOfContentsListBox.Items.Clear();
foreach(Heading heading in _tableOfContents.FlatHeadingList)
{
var newItem = new ExtendedListBoxItem();
if(Application.Current.Resources.Contains(Strings.ListItemStyleKey))
{
newItem.Style = Application.Current.Resources[Strings.ListItemStyleKey] as Style;
}
newItem.SetBinding(ExtendedListBoxItem.SelectionBackgroundProperty, _selectionBackgroundBinding);
newItem.SetBinding(ForegroundProperty, _defaultForegroundBinding);
newItem.Content = heading.Text;
// margin for header, set as multiple of level, currently fixed indentation size
newItem.Margin = new Thickness(heading.level * 15, 0, 0, 0);
newItem.Padding = new Thickness(0, 0, 0, 0);
newItem.Height = 20;
//Set the automation name for each list box item
AutomationProperties.SetAutomationId(newItem, heading.Text);
AutomationProperties.SetHelpText(newItem, heading.Text + ". Use the up and down arrow keys to scroll through the other headings in this book.");
//newItem.GotFocus += SpeakControlOnFocus;
TableOfContentsListBox.Items.Add(newItem);
}
if(IndicateSearchResultsChanged != null)
{
IndicateSearchResultsChanged(this, new EventArgs());
}
//Reset to first heading.
SelectedElement = 0;
}
