private static void OnSearchModePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
AutoCompleteTextBox source = d as AutoCompleteTextBox;
AutoCompleteSearchMode mode = (AutoCompleteSearchMode)e.NewValue;
if (mode != AutoCompleteSearchMode.Contains &&
mode != AutoCompleteSearchMode.ContainsCaseSensitive &&
mode != AutoCompleteSearchMode.ContainsOrdinal &&
mode != AutoCompleteSearchMode.ContainsOrdinalCaseSensitive &&
mode != AutoCompleteSearchMode.Custom &&
mode != AutoCompleteSearchMode.Equals &&
mode != AutoCompleteSearchMode.EqualsCaseSensitive &&
mode != AutoCompleteSearchMode.EqualsOrdinal &&
mode != AutoCompleteSearchMode.EqualsOrdinalCaseSensitive &&
mode != AutoCompleteSearchMode.None &&
mode != AutoCompleteSearchMode.StartsWith &&
mode != AutoCompleteSearchMode.StartsWithCaseSensitive &&
mode != AutoCompleteSearchMode.StartsWithOrdinal &&
mode != AutoCompleteSearchMode.StartsWithOrdinalCaseSensitive)
{
source.SetValue(e.Property, e.OldValue);
throw new ArgumentException("", "value");
}
// Sets the filter predicate for the new value
AutoCompleteSearchMode newValue = (AutoCompleteSearchMode)e.NewValue;
source.TextFilter = AutoCompleteSearch.GetFilter(newValue);
}
/// <summary>
/// ConverterCultureProperty property changed handler.
/// </summary>
/// <param name="d">
/// AutoCompleteBox that changed its ConverterCulture.
/// </param>
/// <param name="e">Event arguments.</param>
private static void OnConverterCulturePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
AutoCompleteTextBox source = d as AutoCompleteTextBox;
if (source.View != null && source.View.Count > 0)
{
source.ToggleDropDown(d, new RoutedEventArgs());
}
}
/// <summary>
/// MinimumPrefixLengthProperty property changed handler.
/// </summary>
/// <param name="d">AutoCompleteBox that changed its MinimumPrefixLength.</param>
/// <param name="e">Event arguments.</param>
private static void OnMinimumPrefixLengthPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
AutoCompleteTextBox source = d as AutoCompleteTextBox;
int newValue = (int)e.NewValue;
// If negative, coerce the value to -1
if (newValue < 0 && newValue != -1)
{
source.SetValue(e.Property, -1);
}
}
/// <summary>
/// ItemFilterProperty property changed handler.
/// </summary>
/// <param name="d">AutoCompleteBox that changed its ItemFilter.</param>
/// <param name="e">Event arguments.</param>
private static void OnItemFilterPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
AutoCompleteTextBox source = d as AutoCompleteTextBox;
Func <string, object, bool> value = e.NewValue as Func <string, object, bool>;
// If null, revert to the "None" predicate
if (value == null)
{
source.SearchMode = AutoCompleteSearchMode.None;
}
else
{
source.SearchMode = AutoCompleteSearchMode.Custom;
source.TextFilter = null;
}
}
private static void OnMinimumPopulateDelayPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
AutoCompleteTextBox source = d as AutoCompleteTextBox;
if (source.IgnorePropertyChange)
{
source.IgnorePropertyChange = false;
return;
}
int newValue = (int)e.NewValue;
if (newValue < 0)
{
source.IgnorePropertyChange = true;
d.SetValue(e.Property, e.OldValue);
throw new ArgumentException(string.Format(CultureInfo.InvariantCulture, "{0}", newValue), "value");
}
// Stop any existing timer
if (source.DelayTimer != null)
{
source.DelayTimer.Stop();
if (newValue == 0)
{
source.DelayTimer = null;
}
}
// Create or clear a dispatcher timer instance
if (newValue > 0 && source.DelayTimer == null)
{
source.DelayTimer = new DispatcherTimer();
source.DelayTimer.Tick += source.PopulateDropDown;
}
// Set the new tick interval
if (newValue > 0 && source.DelayTimer != null)
{
source.DelayTimer.Interval = TimeSpan.FromMilliseconds(newValue);
}
}
/// <summary>
/// OnSearchTextProperty property changed handler.
/// </summary>
/// <param name="d">AutoCompleteBox that changed its SearchText.</param>
/// <param name="e">Event arguments.</param>
private static void OnSearchTextPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
AutoCompleteTextBox source = d as AutoCompleteTextBox;
if (source.IgnorePropertyChange)
{
source.IgnorePropertyChange = false;
return;
}
// Ensure the property is only written when expected
if (!source.AllowWrite)
{
// Reset the old value before it was incorrectly written
source.IgnorePropertyChange = true;
source.SetValue(e.Property, e.OldValue);
throw new InvalidOperationException("");
}
}
private static void OnMaxDropDownHeightPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
AutoCompleteTextBox source = d as AutoCompleteTextBox;
if (source.IgnorePropertyChange)
{
source.IgnorePropertyChange = false;
return;
}
double newValue = (double)e.NewValue;
// Revert to the old value if invalid (negative)
if (newValue < 0)
{
source.IgnorePropertyChange = true;
source.SetValue(e.Property, e.OldValue);
throw new ArgumentException(string.Format(CultureInfo.InvariantCulture, "{0}", e.NewValue), "value");
}
source.OnMaxDropDownHeightChanged(newValue);
}
/// <summary>
/// SelectedItemProperty property changed handler. Fires the
/// SelectionChanged event. The event data will contain any non-null
/// removed items and non-null additions.
/// </summary>
/// <param name="d">AutoCompleteBox that changed its SelectedItem.</param>
/// <param name="e">Event arguments.</param>
private static void OnSelectedItemPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
AutoCompleteTextBox source = d as AutoCompleteTextBox;
if (source.IgnorePropertyChange)
{
source.IgnorePropertyChange = false;
return;
}
// Ensure the property is only written when expected
if (!source.AllowWrite)
{
// Reset the old value before it was incorrectly written
source.IgnorePropertyChange = true;
source.SetValue(e.Property, e.OldValue);
throw new InvalidOperationException("");
}
List <object> removed = new List <object>();
if (e.OldValue != null)
{
removed.Add(e.OldValue);
}
List <object> added = new List <object>();
if (e.NewValue != null)
{
added.Add(e.NewValue);
}
// source.OnSelectionChanged(new SelectionChangedEventArgs(null,removed, added));
}
/// <summary>
/// TextProperty property changed handler.
/// </summary>
/// <param name="d">AutoCompleteBox that changed its Text.</param>
/// <param name="e">Event arguments.</param>
private static void OnTextPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
AutoCompleteTextBox source = d as AutoCompleteTextBox;
source.TextUpdated((string)e.NewValue, false);
}
/// <summary>
/// ItemsSourceProperty property changed handler.
/// </summary>
/// <param name="d">AutoCompleteBox that changed its ItemsSource.</param>
/// <param name="e">Event arguments.</param>
private static void OnItemsSourcePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
AutoCompleteTextBox autoComplete = d as AutoCompleteTextBox;
autoComplete.OnItemsSourceChanged((IEnumerable)e.OldValue, (IEnumerable)e.NewValue);
}
/// <summary>
/// IsDropDownOpenProperty property changed handler.
/// </summary>
/// <param name="d">AutoCompleteTextBox that changed its IsDropDownOpen.</param>
/// <param name="e">Event arguments.</param>
private static void OnIsDropDownOpenPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
AutoCompleteTextBox source = d as AutoCompleteTextBox;
// Ignore the change if requested
if (source.IgnorePropertyChange)
{
source.IgnorePropertyChange = false;
return;
}
bool oldValue = (bool)e.OldValue;
bool newValue = (bool)e.NewValue;
bool delayedClosingVisual = source.PopupClosedVisualState;
RoutedPropertyChangingEventArgs <bool> args = new RoutedPropertyChangingEventArgs <bool>(e.Property, oldValue, newValue, true);
AutoCompleteBoxAutomationPeer peer = FrameworkElementAutomationPeer.FromElement(source) as AutoCompleteBoxAutomationPeer;
if (peer != null)
{
peer.RaiseExpandCollapseAutomationEvent(oldValue, newValue);
}
if (newValue)
{
// Opening
source.OnDropDownOpening(args);
// Opened
if (!args.Cancel)
{
source.OpenDropDown(oldValue, newValue);
}
}
else
{
// Closing
source.OnDropDownClosing(args);
if (source.View == null || source.View.Count == 0)
{
delayedClosingVisual = false;
}
// Immediately close the drop down window:
// When a popup closed visual state is present, the code path is
// slightly different and the actual call to CloseDropDown will
// be called only after the visual state's transition is done
if (!args.Cancel && !delayedClosingVisual)
{
source.CloseDropDown(oldValue, newValue);
}
}
// If canceled, revert the value change
if (args.Cancel)
{
source.IgnorePropertyChange = true;
source.SetValue(e.Property, oldValue);
}
// Closing call when visual states are in use
if (delayedClosingVisual)
{
source.UpdateVisualState(true);
}
}
