优化更新代码，添加界面功能并整合
This commit is contained in:
GG Z
606
WPFluent/Controls/AutoSuggestBox/AutoSuggestBox.cs
Normal file
606
WPFluent/Controls/AutoSuggestBox/AutoSuggestBox.cs
Normal file
@@ -0,0 +1,606 @@
|
||||
// This Source Code Form is subject to the terms of the MIT License.
|
||||
// If a copy of the MIT was not distributed with this file, You can obtain one at https://opensource.org/licenses/MIT.
|
||||
// Copyright (C) Leszek Pomianowski and WPF UI Contributors.
|
||||
// All Rights Reserved.
|
||||
|
||||
|
||||
using WPFluent.Extensions;
|
||||
using WPFluent.Input;
|
||||
using WPFluent.Interop;
|
||||
|
||||
using System.Collections;
|
||||
using System.Windows.Controls;
|
||||
using System.Windows.Controls.Primitives;
|
||||
|
||||
using System.Windows.Input;
|
||||
|
||||
// ReSharper disable once CheckNamespace
|
||||
namespace WPFluent.Controls;
|
||||
|
||||
/// <summary>
|
||||
/// Represents a text control that makes suggestions to users as they enter text using a keyboard. The app is notified when text has been changed by the user and is responsible for providing relevant suggestions for this control to display.
|
||||
/// </summary>
|
||||
/// <example>
|
||||
/// <code lang="xml">
|
||||
/// <ui:AutoSuggestBox x:Name="AutoSuggestBox" PlaceholderText="Search">
|
||||
/// <ui:AutoSuggestBox.Icon>
|
||||
/// <ui:IconSourceElement>
|
||||
/// <ui:SymbolIconSource Symbol="Search24" />
|
||||
/// </ui:IconSourceElement>
|
||||
/// </ui:AutoSuggestBox.Icon>
|
||||
/// </ui:AutoSuggestBox>
|
||||
/// </code>
|
||||
/// </example>
|
||||
[TemplatePart(Name = ElementTextBox, Type = typeof(TextBox))]
|
||||
[TemplatePart(Name = ElementSuggestionsPopup, Type = typeof(Popup))]
|
||||
[TemplatePart(Name = ElementSuggestionsList, Type = typeof(ListView))]
|
||||
public class AutoSuggestBox : ItemsControl, IIconControl
|
||||
{
|
||||
protected const string ElementTextBox = "PART_TextBox";
|
||||
protected const string ElementSuggestionsPopup = "PART_SuggestionsPopup";
|
||||
protected const string ElementSuggestionsList = "PART_SuggestionsList";
|
||||
|
||||
/// <summary>Identifies the <see cref="OriginalItemsSource"/> dependency property.</summary>
|
||||
public static readonly DependencyProperty OriginalItemsSourceProperty = DependencyProperty.Register(
|
||||
nameof(OriginalItemsSource),
|
||||
typeof(IList),
|
||||
typeof(AutoSuggestBox),
|
||||
new PropertyMetadata(Array.Empty<object>())
|
||||
);
|
||||
|
||||
/// <summary>Identifies the <see cref="IsSuggestionListOpen"/> dependency property.</summary>
|
||||
public static readonly DependencyProperty IsSuggestionListOpenProperty = DependencyProperty.Register(
|
||||
nameof(IsSuggestionListOpen),
|
||||
typeof(bool),
|
||||
typeof(AutoSuggestBox),
|
||||
new PropertyMetadata(false)
|
||||
);
|
||||
|
||||
/// <summary>Identifies the <see cref="Text"/> dependency property.</summary>
|
||||
public static readonly DependencyProperty TextProperty = DependencyProperty.Register(
|
||||
nameof(Text),
|
||||
typeof(string),
|
||||
typeof(AutoSuggestBox),
|
||||
new PropertyMetadata(string.Empty, OnTextChanged)
|
||||
);
|
||||
|
||||
/// <summary>Identifies the <see cref="PlaceholderText"/> dependency property.</summary>
|
||||
public static readonly DependencyProperty PlaceholderTextProperty = DependencyProperty.Register(
|
||||
nameof(PlaceholderText),
|
||||
typeof(string),
|
||||
typeof(AutoSuggestBox),
|
||||
new PropertyMetadata(string.Empty)
|
||||
);
|
||||
|
||||
/// <summary>Identifies the <see cref="UpdateTextOnSelect"/> dependency property.</summary>
|
||||
public static readonly DependencyProperty UpdateTextOnSelectProperty = DependencyProperty.Register(
|
||||
nameof(UpdateTextOnSelect),
|
||||
typeof(bool),
|
||||
typeof(AutoSuggestBox),
|
||||
new PropertyMetadata(true)
|
||||
);
|
||||
|
||||
/// <summary>Identifies the <see cref="MaxSuggestionListHeight"/> dependency property.</summary>
|
||||
public static readonly DependencyProperty MaxSuggestionListHeightProperty = DependencyProperty.Register(
|
||||
nameof(MaxSuggestionListHeight),
|
||||
typeof(double),
|
||||
typeof(AutoSuggestBox),
|
||||
new PropertyMetadata(0d)
|
||||
);
|
||||
|
||||
/// <summary>Identifies the <see cref="Icon"/> dependency property.</summary>
|
||||
public static readonly DependencyProperty IconProperty = DependencyProperty.Register(
|
||||
nameof(Icon),
|
||||
typeof(IconElement),
|
||||
typeof(AutoSuggestBox),
|
||||
new PropertyMetadata(null)
|
||||
);
|
||||
|
||||
/// <summary>Identifies the <see cref="FocusCommand"/> dependency property.</summary>
|
||||
public static readonly DependencyProperty FocusCommandProperty = DependencyProperty.Register(
|
||||
nameof(FocusCommand),
|
||||
typeof(ICommand),
|
||||
typeof(AutoSuggestBox),
|
||||
new PropertyMetadata(null)
|
||||
);
|
||||
|
||||
/// <summary>
|
||||
/// Gets or sets your items here if you want to use the default filtering
|
||||
/// </summary>
|
||||
public IList OriginalItemsSource
|
||||
{
|
||||
get => (IList)GetValue(OriginalItemsSourceProperty);
|
||||
set => SetValue(OriginalItemsSourceProperty, value);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Gets or sets a value indicating whether the drop-down portion of the <see cref="AutoSuggestBox"/> is open.
|
||||
/// </summary>
|
||||
public bool IsSuggestionListOpen
|
||||
{
|
||||
get => (bool)GetValue(IsSuggestionListOpenProperty);
|
||||
set => SetValue(IsSuggestionListOpenProperty, value);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Gets or sets the text that is shown in the control.
|
||||
/// </summary>
|
||||
/// <remarks>
|
||||
/// This property is not typically set in XAML.
|
||||
/// </remarks>
|
||||
public string Text
|
||||
{
|
||||
get => (string)GetValue(TextProperty);
|
||||
set => SetValue(TextProperty, value);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Gets or sets the placeholder text to be displayed in the control.
|
||||
/// </summary>
|
||||
/// <remarks>
|
||||
/// The placeholder text to be displayed in the control. The default is an empty string.
|
||||
/// </remarks>
|
||||
public string PlaceholderText
|
||||
{
|
||||
get => (string)GetValue(PlaceholderTextProperty);
|
||||
set => SetValue(PlaceholderTextProperty, value);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Gets or sets the maximum height for the drop-down portion of the <see cref="AutoSuggestBox"/> control.
|
||||
/// </summary>
|
||||
public double MaxSuggestionListHeight
|
||||
{
|
||||
get => (double)GetValue(MaxSuggestionListHeightProperty);
|
||||
set => SetValue(MaxSuggestionListHeightProperty, value);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Gets or sets a value indicating whether items in the view will trigger an update of the editable text part of the <see cref="AutoSuggestBox"/> when clicked.
|
||||
/// </summary>
|
||||
public bool UpdateTextOnSelect
|
||||
{
|
||||
get => (bool)GetValue(UpdateTextOnSelectProperty);
|
||||
set => SetValue(UpdateTextOnSelectProperty, value);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Gets or sets displayed <see cref="IconElement"/>.
|
||||
/// </summary>
|
||||
public IconElement? Icon
|
||||
{
|
||||
get => (IconElement?)GetValue(IconProperty);
|
||||
set => SetValue(IconProperty, value);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Gets command used for focusing control.
|
||||
/// </summary>
|
||||
public ICommand FocusCommand => (ICommand)GetValue(FocusCommandProperty);
|
||||
|
||||
/// <summary>Identifies the <see cref="QuerySubmitted"/> routed event.</summary>
|
||||
public static readonly RoutedEvent QuerySubmittedEvent = EventManager.RegisterRoutedEvent(
|
||||
nameof(QuerySubmitted),
|
||||
RoutingStrategy.Bubble,
|
||||
typeof(TypedEventHandler<AutoSuggestBox, AutoSuggestBoxQuerySubmittedEventArgs>),
|
||||
typeof(AutoSuggestBox)
|
||||
);
|
||||
|
||||
/// <summary>Identifies the <see cref="SuggestionChosen"/> routed event.</summary>
|
||||
public static readonly RoutedEvent SuggestionChosenEvent = EventManager.RegisterRoutedEvent(
|
||||
nameof(SuggestionChosen),
|
||||
RoutingStrategy.Bubble,
|
||||
typeof(TypedEventHandler<AutoSuggestBox, AutoSuggestBoxSuggestionChosenEventArgs>),
|
||||
typeof(AutoSuggestBox)
|
||||
);
|
||||
|
||||
/// <summary>Identifies the <see cref="TextChanged"/> routed event.</summary>
|
||||
public static readonly RoutedEvent TextChangedEvent = EventManager.RegisterRoutedEvent(
|
||||
nameof(TextChanged),
|
||||
RoutingStrategy.Bubble,
|
||||
typeof(TypedEventHandler<AutoSuggestBox, AutoSuggestBoxTextChangedEventArgs>),
|
||||
typeof(AutoSuggestBox)
|
||||
);
|
||||
|
||||
/// <summary>
|
||||
/// Occurs when the user submits a search query.
|
||||
/// </summary>
|
||||
public event TypedEventHandler<AutoSuggestBox, AutoSuggestBoxQuerySubmittedEventArgs> QuerySubmitted
|
||||
{
|
||||
add => AddHandler(QuerySubmittedEvent, value);
|
||||
remove => RemoveHandler(QuerySubmittedEvent, value);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Event occurs when the user selects an item from the recommended ones.
|
||||
/// </summary>
|
||||
public event TypedEventHandler<AutoSuggestBox, AutoSuggestBoxSuggestionChosenEventArgs> SuggestionChosen
|
||||
{
|
||||
add => AddHandler(SuggestionChosenEvent, value);
|
||||
remove => RemoveHandler(SuggestionChosenEvent, value);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Raised after the text content of the editable control component is updated.
|
||||
/// </summary>
|
||||
public event TypedEventHandler<AutoSuggestBox, AutoSuggestBoxTextChangedEventArgs> TextChanged
|
||||
{
|
||||
add => AddHandler(TextChangedEvent, value);
|
||||
remove => RemoveHandler(TextChangedEvent, value);
|
||||
}
|
||||
|
||||
protected TextBox? TextBox { get; set; } = null;
|
||||
|
||||
protected Popup SuggestionsPopup { get; set; } = null!;
|
||||
|
||||
protected ListView? SuggestionsList { get; set; } = null!;
|
||||
|
||||
private bool _changingTextAfterSuggestionChosen;
|
||||
private bool _isChangedTextOutSideOfTextBox;
|
||||
private object? _selectedItem;
|
||||
private bool? _isHwndHookSubscribed;
|
||||
|
||||
public AutoSuggestBox()
|
||||
{
|
||||
Loaded += static (sender, _) =>
|
||||
{
|
||||
var self = (AutoSuggestBox)sender;
|
||||
|
||||
self.AcquireTemplateResources();
|
||||
};
|
||||
|
||||
Unloaded += static (sender, _) =>
|
||||
{
|
||||
var self = (AutoSuggestBox)sender;
|
||||
|
||||
self.ReleaseTemplateResources();
|
||||
};
|
||||
|
||||
SetValue(FocusCommandProperty, new RelayCommand<object>(_ => Focus()));
|
||||
}
|
||||
|
||||
public override void OnApplyTemplate()
|
||||
{
|
||||
base.OnApplyTemplate();
|
||||
|
||||
TextBox = GetTemplateChild<TextBox>(ElementTextBox);
|
||||
SuggestionsPopup = GetTemplateChild<Popup>(ElementSuggestionsPopup);
|
||||
SuggestionsList = GetTemplateChild<ListView>(ElementSuggestionsList);
|
||||
_isHwndHookSubscribed = false;
|
||||
|
||||
AcquireTemplateResources();
|
||||
}
|
||||
|
||||
/// <inheritdoc cref="UIElement.Focus" />
|
||||
public new bool Focus()
|
||||
{
|
||||
if (TextBox is null)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
|
||||
return TextBox.Focus();
|
||||
}
|
||||
|
||||
protected T GetTemplateChild<T>(string name)
|
||||
where T : DependencyObject
|
||||
{
|
||||
if (GetTemplateChild(name) is not T dependencyObject)
|
||||
{
|
||||
throw new ArgumentNullException(name);
|
||||
}
|
||||
|
||||
return dependencyObject;
|
||||
}
|
||||
|
||||
protected virtual void AcquireTemplateResources()
|
||||
{
|
||||
// Unsubscribe each handler before subscription, to prevent memory leak from double subscriptions.
|
||||
// Unsubscription is safe, even if event has never been subscribed to.
|
||||
if (TextBox != null)
|
||||
{
|
||||
TextBox.PreviewKeyDown -= TextBoxOnPreviewKeyDown;
|
||||
TextBox.PreviewKeyDown += TextBoxOnPreviewKeyDown;
|
||||
TextBox.TextChanged -= TextBoxOnTextChanged;
|
||||
TextBox.TextChanged += TextBoxOnTextChanged;
|
||||
TextBox.LostKeyboardFocus -= TextBoxOnLostKeyboardFocus;
|
||||
TextBox.LostKeyboardFocus += TextBoxOnLostKeyboardFocus;
|
||||
}
|
||||
|
||||
if (SuggestionsList != null)
|
||||
{
|
||||
SuggestionsList.SelectionChanged -= SuggestionsListOnSelectionChanged;
|
||||
SuggestionsList.SelectionChanged += SuggestionsListOnSelectionChanged;
|
||||
SuggestionsList.PreviewKeyDown -= SuggestionsListOnPreviewKeyDown;
|
||||
SuggestionsList.PreviewKeyDown += SuggestionsListOnPreviewKeyDown;
|
||||
SuggestionsList.LostKeyboardFocus -= SuggestionsListOnLostKeyboardFocus;
|
||||
SuggestionsList.LostKeyboardFocus += SuggestionsListOnLostKeyboardFocus;
|
||||
SuggestionsList.PreviewMouseLeftButtonUp -= SuggestionsListOnPreviewMouseLeftButtonUp;
|
||||
SuggestionsList.PreviewMouseLeftButtonUp += SuggestionsListOnPreviewMouseLeftButtonUp;
|
||||
}
|
||||
|
||||
if (_isHwndHookSubscribed.HasValue && !_isHwndHookSubscribed.Value)
|
||||
{
|
||||
var hwnd = (HwndSource)PresentationSource.FromVisual(this)!;
|
||||
hwnd.AddHook(Hook);
|
||||
_isHwndHookSubscribed = true;
|
||||
}
|
||||
}
|
||||
|
||||
protected virtual void ReleaseTemplateResources()
|
||||
{
|
||||
if (TextBox != null)
|
||||
{
|
||||
TextBox.PreviewKeyDown -= TextBoxOnPreviewKeyDown;
|
||||
TextBox.TextChanged -= TextBoxOnTextChanged;
|
||||
TextBox.LostKeyboardFocus -= TextBoxOnLostKeyboardFocus;
|
||||
}
|
||||
|
||||
if (SuggestionsList != null)
|
||||
{
|
||||
SuggestionsList.SelectionChanged -= SuggestionsListOnSelectionChanged;
|
||||
SuggestionsList.PreviewKeyDown -= SuggestionsListOnPreviewKeyDown;
|
||||
SuggestionsList.LostKeyboardFocus -= SuggestionsListOnLostKeyboardFocus;
|
||||
SuggestionsList.PreviewMouseLeftButtonUp -= SuggestionsListOnPreviewMouseLeftButtonUp;
|
||||
}
|
||||
|
||||
if (
|
||||
_isHwndHookSubscribed.HasValue && _isHwndHookSubscribed.Value
|
||||
&& PresentationSource.FromVisual(this) is HwndSource source
|
||||
)
|
||||
{
|
||||
source.RemoveHook(Hook);
|
||||
_isHwndHookSubscribed = false;
|
||||
}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Method for <see cref="QuerySubmitted"/>.
|
||||
/// </summary>
|
||||
/// <param name="queryText">Currently submitted query text.</param>
|
||||
protected virtual void OnQuerySubmitted(string queryText)
|
||||
{
|
||||
var args = new AutoSuggestBoxQuerySubmittedEventArgs(QuerySubmittedEvent, this)
|
||||
{
|
||||
QueryText = queryText,
|
||||
};
|
||||
|
||||
RaiseEvent(args);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Method for <see cref="SuggestionChosen"/>.
|
||||
/// </summary>
|
||||
/// <param name="selectedItem">Currently selected item.</param>
|
||||
protected virtual void OnSuggestionChosen(object selectedItem)
|
||||
{
|
||||
var args = new AutoSuggestBoxSuggestionChosenEventArgs(SuggestionChosenEvent, this)
|
||||
{
|
||||
SelectedItem = selectedItem,
|
||||
};
|
||||
|
||||
RaiseEvent(args);
|
||||
|
||||
if (UpdateTextOnSelect && !args.Handled)
|
||||
{
|
||||
UpdateTexBoxTextAfterSelection(selectedItem);
|
||||
}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Method for <see cref="TextChanged"/>.
|
||||
/// </summary>
|
||||
/// <param name="reason">Data for the text changed event.</param>
|
||||
/// <param name="text">Changed text.</param>
|
||||
protected virtual void OnTextChanged(AutoSuggestionBoxTextChangeReason reason, string text)
|
||||
{
|
||||
var args = new AutoSuggestBoxTextChangedEventArgs(TextChangedEvent, this)
|
||||
{
|
||||
Reason = reason,
|
||||
Text = text,
|
||||
};
|
||||
|
||||
RaiseEvent(args);
|
||||
|
||||
if (args is { Handled: false, Reason: AutoSuggestionBoxTextChangeReason.UserInput })
|
||||
{
|
||||
DefaultFiltering(text);
|
||||
}
|
||||
}
|
||||
|
||||
private void TextBoxOnPreviewKeyDown(object sender, KeyEventArgs e)
|
||||
{
|
||||
if (e.Key is Key.Escape)
|
||||
{
|
||||
SetCurrentValue(IsSuggestionListOpenProperty, false);
|
||||
return;
|
||||
}
|
||||
|
||||
if (e.Key is Key.Enter)
|
||||
{
|
||||
SetCurrentValue(IsSuggestionListOpenProperty, false);
|
||||
OnQuerySubmitted(TextBox!.Text);
|
||||
return;
|
||||
}
|
||||
|
||||
if (e.Key is not Key.Down || !IsSuggestionListOpen)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
_ = SuggestionsList?.Focus();
|
||||
}
|
||||
|
||||
private void TextBoxOnLostKeyboardFocus(object sender, KeyboardFocusChangedEventArgs e)
|
||||
{
|
||||
if (e.NewFocus is ListView)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
SetCurrentValue(IsSuggestionListOpenProperty, false);
|
||||
}
|
||||
|
||||
private void TextBoxOnTextChanged(object sender, TextChangedEventArgs e)
|
||||
{
|
||||
var changeReason = AutoSuggestionBoxTextChangeReason.UserInput;
|
||||
|
||||
if (_changingTextAfterSuggestionChosen)
|
||||
{
|
||||
changeReason = AutoSuggestionBoxTextChangeReason.SuggestionChosen;
|
||||
}
|
||||
|
||||
if (_isChangedTextOutSideOfTextBox)
|
||||
{
|
||||
changeReason = AutoSuggestionBoxTextChangeReason.ProgrammaticChange;
|
||||
}
|
||||
|
||||
OnTextChanged(changeReason, TextBox!.Text);
|
||||
|
||||
SuggestionsList!.SetCurrentValue(Selector.SelectedItemProperty, null);
|
||||
|
||||
if (changeReason is not AutoSuggestionBoxTextChangeReason.UserInput)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
SetCurrentValue(IsSuggestionListOpenProperty, true);
|
||||
}
|
||||
|
||||
private void SuggestionsListOnLostKeyboardFocus(object sender, KeyboardFocusChangedEventArgs e)
|
||||
{
|
||||
if (e.NewFocus is ListViewItem)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
SetCurrentValue(IsSuggestionListOpenProperty, false);
|
||||
}
|
||||
|
||||
private void SuggestionsListOnPreviewKeyDown(object sender, KeyEventArgs e)
|
||||
{
|
||||
if (e.Key is not Key.Enter)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
SetCurrentValue(IsSuggestionListOpenProperty, false);
|
||||
|
||||
OnSelectedChanged(SuggestionsList!.SelectedItem);
|
||||
}
|
||||
|
||||
private void SuggestionsListOnPreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
|
||||
{
|
||||
if (SuggestionsList!.SelectedItem is not null)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
SetCurrentValue(IsSuggestionListOpenProperty, false);
|
||||
|
||||
if (_selectedItem is not null)
|
||||
{
|
||||
OnSuggestionChosen(_selectedItem);
|
||||
}
|
||||
}
|
||||
|
||||
private void SuggestionsListOnSelectionChanged(object sender, SelectionChangedEventArgs e)
|
||||
{
|
||||
if (SuggestionsList!.SelectedItem is null)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
OnSelectedChanged(SuggestionsList.SelectedItem);
|
||||
}
|
||||
|
||||
private IntPtr Hook(IntPtr hwnd, int msg, IntPtr wparam, IntPtr lparam, ref bool handled)
|
||||
{
|
||||
if (!IsSuggestionListOpen)
|
||||
{
|
||||
return IntPtr.Zero;
|
||||
}
|
||||
|
||||
var message = (User32.WM)msg;
|
||||
|
||||
if (message is User32.WM.NCACTIVATE or User32.WM.WINDOWPOSCHANGED)
|
||||
{
|
||||
SetCurrentValue(IsSuggestionListOpenProperty, false);
|
||||
}
|
||||
|
||||
return IntPtr.Zero;
|
||||
}
|
||||
|
||||
private void OnSelectedChanged(object selectedObj)
|
||||
{
|
||||
OnSuggestionChosen(selectedObj);
|
||||
|
||||
_selectedItem = selectedObj;
|
||||
}
|
||||
|
||||
private void UpdateTexBoxTextAfterSelection(object selectedObj)
|
||||
{
|
||||
_changingTextAfterSuggestionChosen = true;
|
||||
|
||||
TextBox!.SetCurrentValue(System.Windows.Controls.TextBox.TextProperty, GetStringFromObj(selectedObj));
|
||||
|
||||
_changingTextAfterSuggestionChosen = false;
|
||||
}
|
||||
|
||||
private void DefaultFiltering(string text)
|
||||
{
|
||||
if (string.IsNullOrEmpty(text))
|
||||
{
|
||||
SetCurrentValue(ItemsSourceProperty, OriginalItemsSource);
|
||||
return;
|
||||
}
|
||||
|
||||
var splitText = text.Split(' ');
|
||||
var suitableItems = OriginalItemsSource
|
||||
.Cast<object>()
|
||||
.Where(item =>
|
||||
{
|
||||
var itemText = GetStringFromObj(item);
|
||||
return splitText.All(key =>
|
||||
itemText?.Contains(key, StringComparison.OrdinalIgnoreCase) ?? false
|
||||
);
|
||||
})
|
||||
.ToList();
|
||||
|
||||
SetCurrentValue(ItemsSourceProperty, suitableItems);
|
||||
}
|
||||
|
||||
private string? GetStringFromObj(object obj)
|
||||
{
|
||||
// uses reflection. maybe it needs some optimization?
|
||||
var displayMemberPathText =
|
||||
!string.IsNullOrEmpty(DisplayMemberPath)
|
||||
&& obj.GetType().GetProperty(DisplayMemberPath)?.GetValue(obj) is string value
|
||||
? value
|
||||
: null;
|
||||
|
||||
return displayMemberPathText ?? obj as string ?? obj.ToString();
|
||||
}
|
||||
|
||||
private static void OnTextChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
|
||||
{
|
||||
var self = (AutoSuggestBox)d;
|
||||
var newText = (string)e.NewValue;
|
||||
|
||||
if (self.TextBox is null)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
if (self.TextBox.Text == newText)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
self._isChangedTextOutSideOfTextBox = true;
|
||||
|
||||
self.TextBox.SetCurrentValue(System.Windows.Controls.TextBox.TextProperty, newText);
|
||||
|
||||
self._isChangedTextOutSideOfTextBox = false;
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user