v1.2
This commit is contained in:
Stephan Maier
612
AutoCompleteTextBox/Editors/AutoCompleteComboBox.cs
Normal file
612
AutoCompleteTextBox/Editors/AutoCompleteComboBox.cs
Normal file
@@ -0,0 +1,612 @@
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using System;
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using System.Collections;
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using System.Threading;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Controls.Primitives;
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using System.Windows.Data;
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using System.Windows.Input;
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using System.Windows.Media;
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using System.Windows.Threading;
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namespace AutoCompleteTextBox.Editors
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{
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[TemplatePart(Name = PartEditor, Type = typeof(TextBox))]
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[TemplatePart(Name = PartPopup, Type = typeof(Popup))]
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[TemplatePart(Name = PartSelector, Type = typeof(Selector))]
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[TemplatePart(Name = PartExpander, Type = typeof(Expander))]
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public class AutoCompleteComboBox : Control
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{
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#region "Fields"
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public const string PartEditor = "PART_Editor";
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public const string PartPopup = "PART_Popup";
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public const string PartSelector = "PART_Selector";
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public const string PartExpander = "PART_Expander";
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public static readonly DependencyProperty DelayProperty = DependencyProperty.Register("Delay", typeof(int), typeof(AutoCompleteComboBox), new FrameworkPropertyMetadata(200));
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public static readonly DependencyProperty DisplayMemberProperty = DependencyProperty.Register("DisplayMember", typeof(string), typeof(AutoCompleteComboBox), new FrameworkPropertyMetadata(string.Empty));
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public static readonly DependencyProperty IconPlacementProperty = DependencyProperty.Register("IconPlacement", typeof(IconPlacement), typeof(AutoCompleteComboBox), new FrameworkPropertyMetadata(IconPlacement.Left));
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public static readonly DependencyProperty IconProperty = DependencyProperty.Register("Icon", typeof(object), typeof(AutoCompleteComboBox), new FrameworkPropertyMetadata(null));
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public static readonly DependencyProperty IconVisibilityProperty = DependencyProperty.Register("IconVisibility", typeof(Visibility), typeof(AutoCompleteComboBox), new FrameworkPropertyMetadata(Visibility.Visible));
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public static readonly DependencyProperty IsDropDownOpenProperty = DependencyProperty.Register("IsDropDownOpen", typeof(bool), typeof(AutoCompleteComboBox), new FrameworkPropertyMetadata(false));
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public static readonly DependencyProperty IsLoadingProperty = DependencyProperty.Register("IsLoading", typeof(bool), typeof(AutoCompleteComboBox), new FrameworkPropertyMetadata(false));
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public static readonly DependencyProperty IsReadOnlyProperty = DependencyProperty.Register("IsReadOnly", typeof(bool), typeof(AutoCompleteComboBox), new FrameworkPropertyMetadata(false));
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public static readonly DependencyProperty ItemTemplateProperty = DependencyProperty.Register("ItemTemplate", typeof(DataTemplate), typeof(AutoCompleteComboBox), new FrameworkPropertyMetadata(null));
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public static readonly DependencyProperty ItemTemplateSelectorProperty = DependencyProperty.Register("ItemTemplateSelector", typeof(DataTemplateSelector), typeof(AutoCompleteComboBox));
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public static readonly DependencyProperty LoadingContentProperty = DependencyProperty.Register("LoadingContent", typeof(object), typeof(AutoCompleteComboBox), new FrameworkPropertyMetadata(null));
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public static readonly DependencyProperty ProviderProperty = DependencyProperty.Register("Provider", typeof(IComboSuggestionProvider), typeof(AutoCompleteComboBox), new FrameworkPropertyMetadata(null));
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public static readonly DependencyProperty SelectedItemProperty = DependencyProperty.Register("SelectedItem", typeof(object), typeof(AutoCompleteComboBox), new FrameworkPropertyMetadata(null, OnSelectedItemChanged));
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public static readonly DependencyProperty TextProperty = DependencyProperty.Register("Text", typeof(string), typeof(AutoCompleteComboBox), new FrameworkPropertyMetadata(string.Empty, propertyChangedCallback: null, coerceValueCallback: null, isAnimationProhibited: false, defaultUpdateSourceTrigger: UpdateSourceTrigger.LostFocus, flags: FrameworkPropertyMetadataOptions.BindsTwoWayByDefault));
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public static readonly DependencyProperty FilterProperty = DependencyProperty.Register("Filter", typeof(string), typeof(AutoCompleteComboBox), new FrameworkPropertyMetadata(string.Empty));
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public static readonly DependencyProperty MaxLengthProperty = DependencyProperty.Register("MaxLength", typeof(int), typeof(AutoCompleteComboBox), new FrameworkPropertyMetadata(0));
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public static readonly DependencyProperty CharacterCasingProperty = DependencyProperty.Register("CharacterCasing", typeof(CharacterCasing), typeof(AutoCompleteComboBox), new FrameworkPropertyMetadata(CharacterCasing.Normal));
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public static readonly DependencyProperty MaxPopUpHeightProperty = DependencyProperty.Register("MaxPopUpHeight", typeof(int), typeof(AutoCompleteComboBox), new FrameworkPropertyMetadata(600));
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public static readonly DependencyProperty MaxPopUpWidthProperty = DependencyProperty.Register("MaxPopUpWidth", typeof(int), typeof(AutoCompleteComboBox), new FrameworkPropertyMetadata(2000));
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public static readonly DependencyProperty WatermarkProperty = DependencyProperty.Register("Watermark", typeof(string), typeof(AutoCompleteComboBox), new FrameworkPropertyMetadata(string.Empty));
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public static readonly DependencyProperty SuggestionBackgroundProperty = DependencyProperty.Register("SuggestionBackground", typeof(Brush), typeof(AutoCompleteComboBox), new FrameworkPropertyMetadata(Brushes.White));
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private bool _isUpdatingText;
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private bool _selectionCancelled;
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private SuggestionsAdapter _suggestionsAdapter;
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#endregion
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#region "Constructors"
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static AutoCompleteComboBox()
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{
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DefaultStyleKeyProperty.OverrideMetadata(typeof(AutoCompleteComboBox), new FrameworkPropertyMetadata(typeof(AutoCompleteComboBox)));
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}
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#endregion
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#region "Properties"
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public int MaxPopupHeight
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{
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get => (int)GetValue(MaxPopUpHeightProperty);
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set => SetValue(MaxPopUpHeightProperty, value);
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}
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public int MaxPopupWidth
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{
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get => (int)GetValue(MaxPopUpWidthProperty);
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set => SetValue(MaxPopUpWidthProperty, value);
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}
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public BindingEvaluator BindingEvaluator { get; set; }
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public CharacterCasing CharacterCasing
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{
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get => (CharacterCasing)GetValue(CharacterCasingProperty);
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set => SetValue(CharacterCasingProperty, value);
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}
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public int MaxLength
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{
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get => (int)GetValue(MaxLengthProperty);
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set => SetValue(MaxLengthProperty, value);
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}
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public int Delay
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{
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get => (int)GetValue(DelayProperty);
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set => SetValue(DelayProperty, value);
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}
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public string DisplayMember
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{
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get => (string)GetValue(DisplayMemberProperty);
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set => SetValue(DisplayMemberProperty, value);
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}
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public TextBox Editor { get; set; }
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public Expander Expander { get; set; }
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public DispatcherTimer FetchTimer { get; set; }
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public string Filter
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{
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get => (string)GetValue(FilterProperty);
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set => SetValue(FilterProperty, value);
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}
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public object Icon
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{
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get => GetValue(IconProperty);
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set => SetValue(IconProperty, value);
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}
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public IconPlacement IconPlacement
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{
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get => (IconPlacement)GetValue(IconPlacementProperty);
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set => SetValue(IconPlacementProperty, value);
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}
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public Visibility IconVisibility
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{
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get => (Visibility)GetValue(IconVisibilityProperty);
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set => SetValue(IconVisibilityProperty, value);
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}
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public bool IsDropDownOpen
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{
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get => (bool)GetValue(IsDropDownOpenProperty);
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set
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{
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this.Expander.IsExpanded = value;
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SetValue(IsDropDownOpenProperty, value);
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}
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}
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public bool IsLoading
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{
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get => (bool)GetValue(IsLoadingProperty);
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set => SetValue(IsLoadingProperty, value);
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}
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public bool IsReadOnly
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{
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get => (bool)GetValue(IsReadOnlyProperty);
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set => SetValue(IsReadOnlyProperty, value);
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}
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public Selector ItemsSelector { get; set; }
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public DataTemplate ItemTemplate
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{
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get => (DataTemplate)GetValue(ItemTemplateProperty);
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set => SetValue(ItemTemplateProperty, value);
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}
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public DataTemplateSelector ItemTemplateSelector
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{
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get => ((DataTemplateSelector)(GetValue(ItemTemplateSelectorProperty)));
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set => SetValue(ItemTemplateSelectorProperty, value);
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}
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public object LoadingContent
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{
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get => GetValue(LoadingContentProperty);
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set => SetValue(LoadingContentProperty, value);
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}
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public Popup Popup { get; set; }
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public IComboSuggestionProvider Provider
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{
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get => (IComboSuggestionProvider)GetValue(ProviderProperty);
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set => SetValue(ProviderProperty, value);
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}
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public object SelectedItem
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{
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get => GetValue(SelectedItemProperty);
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set => SetValue(SelectedItemProperty, value);
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}
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public SelectionAdapter SelectionAdapter { get; set; }
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public string Text
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{
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get => (string)GetValue(TextProperty);
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set => SetValue(TextProperty, value);
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}
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public string Watermark
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{
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get => (string)GetValue(WatermarkProperty);
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set => SetValue(WatermarkProperty, value);
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}
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public Brush SuggestionBackground
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{
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get => (Brush)GetValue(SuggestionBackgroundProperty);
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set => SetValue(SuggestionBackgroundProperty, value);
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}
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#endregion
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#region "Methods"
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public static void OnSelectedItemChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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AutoCompleteComboBox act = null;
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act = d as AutoCompleteComboBox;
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if (act != null)
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{
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if (act.Editor != null & !act._isUpdatingText)
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{
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act._isUpdatingText = true;
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act.Editor.Text = act.BindingEvaluator.Evaluate(e.NewValue);
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act._isUpdatingText = false;
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}
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}
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}
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private void ScrollToSelectedItem()
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{
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if (ItemsSelector is ListBox listBox && listBox.SelectedItem != null)
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listBox.ScrollIntoView(listBox.SelectedItem);
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}
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public new BindingExpressionBase SetBinding(DependencyProperty dp, BindingBase binding){
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var res = base.SetBinding(dp, binding);
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CheckForParentTextBindingChange();
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return res;
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}
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public new BindingExpressionBase SetBinding(DependencyProperty dp, String path) {
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var res = base.SetBinding(dp, path);
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CheckForParentTextBindingChange();
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return res;
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}
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public new void ClearValue(DependencyPropertyKey key) {
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base.ClearValue(key);
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CheckForParentTextBindingChange();
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}
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public new void ClearValue(DependencyProperty dp) {
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base.ClearValue(dp);
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CheckForParentTextBindingChange();
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}
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private void CheckForParentTextBindingChange(bool force=false) {
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var CurrentBindingMode = BindingOperations.GetBinding(this, TextProperty)?.UpdateSourceTrigger ?? UpdateSourceTrigger.Default;
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if (CurrentBindingMode != UpdateSourceTrigger.PropertyChanged)//preventing going any less frequent than property changed
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CurrentBindingMode = UpdateSourceTrigger.Default;
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if (CurrentBindingMode == CurrentTextboxTextBindingUpdateMode && force == false)
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return;
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var binding = new Binding {
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Mode = BindingMode.TwoWay,
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UpdateSourceTrigger = CurrentBindingMode,
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Path = new PropertyPath(nameof(Text)),
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RelativeSource = new RelativeSource(RelativeSourceMode.TemplatedParent),
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};
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CurrentTextboxTextBindingUpdateMode = CurrentBindingMode;
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Editor?.SetBinding(TextBox.TextProperty, binding);
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}
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private UpdateSourceTrigger CurrentTextboxTextBindingUpdateMode;
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public override void OnApplyTemplate()
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{
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base.OnApplyTemplate();
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Editor = Template.FindName(PartEditor, this) as TextBox;
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Popup = Template.FindName(PartPopup, this) as Popup;
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ItemsSelector = Template.FindName(PartSelector, this) as Selector;
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Expander = Template.FindName(PartExpander, this) as Expander;
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BindingEvaluator = new BindingEvaluator(new Binding(DisplayMember));
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if (Editor != null)
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{
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Editor.TextChanged += OnEditorTextChanged;
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Editor.PreviewKeyDown += OnEditorKeyDown;
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Editor.LostFocus += OnEditorLostFocus;
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CheckForParentTextBindingChange(true);
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if (SelectedItem != null)
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{
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_isUpdatingText = true;
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Editor.Text = BindingEvaluator.Evaluate(SelectedItem);
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_isUpdatingText = false;
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}
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}
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if (Expander != null)
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{
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Expander.IsExpanded = false;
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Expander.Collapsed += Expander_Expanded;
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Expander.Expanded += Expander_Expanded;
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}
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GotFocus += AutoCompleteComboBox_GotFocus;
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if (Popup != null)
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{
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Popup.StaysOpen = false;
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Popup.Opened += OnPopupOpened;
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Popup.Closed += OnPopupClosed;
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}
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if (ItemsSelector != null)
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{
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SelectionAdapter = new SelectionAdapter(ItemsSelector);
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SelectionAdapter.Commit += OnSelectionAdapterCommit;
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SelectionAdapter.Cancel += OnSelectionAdapterCancel;
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SelectionAdapter.SelectionChanged += OnSelectionAdapterSelectionChanged;
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ItemsSelector.PreviewMouseDown += ItemsSelector_PreviewMouseDown;
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}
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}
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private void Expander_Expanded(object sender, RoutedEventArgs e)
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{
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this.IsDropDownOpen = Expander.IsExpanded;
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if (!this.IsDropDownOpen)
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{
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return;
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}
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if (_suggestionsAdapter == null)
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{
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_suggestionsAdapter = new SuggestionsAdapter(this);
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}
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if (SelectedItem != null || String.IsNullOrWhiteSpace(Editor.Text))
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_suggestionsAdapter.ShowFullCollection();
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}
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private void ItemsSelector_PreviewMouseDown(object sender, MouseButtonEventArgs e)
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{
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if ((e.OriginalSource as FrameworkElement)?.DataContext == null)
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return;
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if (!ItemsSelector.Items.Contains(((FrameworkElement)e.OriginalSource)?.DataContext))
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return;
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ItemsSelector.SelectedItem = ((FrameworkElement)e.OriginalSource)?.DataContext;
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OnSelectionAdapterCommit(SelectionAdapter.EventCause.ItemClicked);
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e.Handled = true;
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}
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private void AutoCompleteComboBox_GotFocus(object sender, RoutedEventArgs e)
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{
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Editor?.Focus();
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}
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private string GetDisplayText(object dataItem)
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{
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if (BindingEvaluator == null)
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{
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BindingEvaluator = new BindingEvaluator(new Binding(DisplayMember));
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}
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if (dataItem == null)
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{
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return string.Empty;
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}
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if (string.IsNullOrEmpty(DisplayMember))
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{
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return dataItem.ToString();
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}
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return BindingEvaluator.Evaluate(dataItem);
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}
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private void OnEditorKeyDown(object sender, KeyEventArgs e)
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{
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if (SelectionAdapter != null)
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{
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if (IsDropDownOpen)
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SelectionAdapter.HandleKeyDown(e);
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else
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IsDropDownOpen = e.Key == Key.Down || e.Key == Key.Up;
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}
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}
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private void OnEditorLostFocus(object sender, RoutedEventArgs e)
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{
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if (!IsKeyboardFocusWithin)
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{
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IsDropDownOpen = false;
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}
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}
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private void OnEditorTextChanged(object sender, TextChangedEventArgs e)
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{
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Text = Editor.Text;
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if (_isUpdatingText)
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return;
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if (FetchTimer == null)
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{
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FetchTimer = new DispatcherTimer { Interval = TimeSpan.FromMilliseconds(Delay) };
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FetchTimer.Tick += OnFetchTimerTick;
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}
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FetchTimer.IsEnabled = false;
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FetchTimer.Stop();
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SetSelectedItem(null);
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if (Editor.Text.Length > 0)
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{
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FetchTimer.IsEnabled = true;
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FetchTimer.Start();
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}
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else
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{
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IsDropDownOpen = false;
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}
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}
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private void OnFetchTimerTick(object sender, EventArgs e)
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{
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FetchTimer.IsEnabled = false;
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FetchTimer.Stop();
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if (Provider != null && ItemsSelector != null)
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{
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Filter = Editor.Text;
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if (_suggestionsAdapter == null)
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{
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_suggestionsAdapter = new SuggestionsAdapter(this);
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}
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_suggestionsAdapter.GetSuggestions(Filter);
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}
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}
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private void OnPopupClosed(object sender, EventArgs e)
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{
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if (!_selectionCancelled)
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{
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OnSelectionAdapterCommit(SelectionAdapter.EventCause.PopupClosed);
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}
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}
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private void OnPopupOpened(object sender, EventArgs e)
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{
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_selectionCancelled = false;
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ItemsSelector.SelectedItem = SelectedItem;
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}
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public event EventHandler<SelectionAdapter.PreSelectionAdapterFinishArgs> PreSelectionAdapterFinish;
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private bool PreSelectionEventSomeoneHandled(SelectionAdapter.EventCause cause, bool is_cancel) {
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if (PreSelectionAdapterFinish == null)
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return false;
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var args = new SelectionAdapter.PreSelectionAdapterFinishArgs { cause = cause, is_cancel = is_cancel };
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PreSelectionAdapterFinish?.Invoke(this, args);
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return args.handled;
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}
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private void OnSelectionAdapterCancel(SelectionAdapter.EventCause cause)
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{
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if (PreSelectionEventSomeoneHandled(cause, true))
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return;
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_isUpdatingText = true;
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Editor.Text = SelectedItem == null ? Filter : GetDisplayText(SelectedItem);
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Editor.SelectionStart = Editor.Text.Length;
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Editor.SelectionLength = 0;
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_isUpdatingText = false;
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IsDropDownOpen = false;
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_selectionCancelled = true;
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}
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private void OnSelectionAdapterCommit(SelectionAdapter.EventCause cause)
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{
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if (PreSelectionEventSomeoneHandled(cause, false))
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return;
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if (ItemsSelector.SelectedItem != null)
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{
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SelectedItem = ItemsSelector.SelectedItem;
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_isUpdatingText = true;
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Editor.Text = GetDisplayText(ItemsSelector.SelectedItem);
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SetSelectedItem(ItemsSelector.SelectedItem);
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_isUpdatingText = false;
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IsDropDownOpen = false;
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}
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}
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private void OnSelectionAdapterSelectionChanged()
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{
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_isUpdatingText = true;
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Editor.Text = ItemsSelector.SelectedItem == null ? Filter : GetDisplayText(ItemsSelector.SelectedItem);
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||||
Editor.SelectionStart = Editor.Text.Length;
|
||||
Editor.SelectionLength = 0;
|
||||
ScrollToSelectedItem();
|
||||
_isUpdatingText = false;
|
||||
}
|
||||
|
||||
private void SetSelectedItem(object item)
|
||||
{
|
||||
_isUpdatingText = true;
|
||||
SelectedItem = item;
|
||||
_isUpdatingText = false;
|
||||
}
|
||||
#endregion
|
||||
|
||||
#region "Nested Types"
|
||||
|
||||
private class SuggestionsAdapter
|
||||
{
|
||||
|
||||
#region "Fields"
|
||||
|
||||
private readonly AutoCompleteComboBox _actb;
|
||||
|
||||
private string _filter;
|
||||
#endregion
|
||||
|
||||
#region "Constructors"
|
||||
|
||||
public SuggestionsAdapter(AutoCompleteComboBox actb)
|
||||
{
|
||||
_actb = actb;
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region "Methods"
|
||||
|
||||
public void GetSuggestions(string searchText)
|
||||
{
|
||||
_actb.IsLoading = true;
|
||||
// Do not open drop down if control is not focused
|
||||
if (_actb.IsKeyboardFocusWithin)
|
||||
_actb.IsDropDownOpen = true;
|
||||
_actb.ItemsSelector.ItemsSource = null;
|
||||
ParameterizedThreadStart thInfo = GetSuggestionsAsync;
|
||||
Thread th = new Thread(thInfo);
|
||||
_filter = searchText;
|
||||
th.Start(new object[] { searchText, _actb.Provider });
|
||||
}
|
||||
public void ShowFullCollection()
|
||||
{
|
||||
_filter = string.Empty;
|
||||
_actb.IsLoading = true;
|
||||
// Do not open drop down if control is not focused
|
||||
if (_actb.IsKeyboardFocusWithin)
|
||||
_actb.IsDropDownOpen = true;
|
||||
_actb.ItemsSelector.ItemsSource = null;
|
||||
ParameterizedThreadStart thInfo = GetFullCollectionAsync;
|
||||
Thread th = new Thread(thInfo);
|
||||
th.Start(_actb.Provider);
|
||||
}
|
||||
|
||||
private void DisplaySuggestions(IEnumerable suggestions, string filter)
|
||||
{
|
||||
if (_filter != filter)
|
||||
{
|
||||
return;
|
||||
}
|
||||
_actb.IsLoading = false;
|
||||
_actb.ItemsSelector.ItemsSource = suggestions;
|
||||
// Close drop down if there are no items
|
||||
if (_actb.IsDropDownOpen)
|
||||
{
|
||||
_actb.IsDropDownOpen = _actb.ItemsSelector.HasItems;
|
||||
}
|
||||
}
|
||||
|
||||
private void GetSuggestionsAsync(object param)
|
||||
{
|
||||
if (param is object[] args)
|
||||
{
|
||||
string searchText = Convert.ToString(args[0]);
|
||||
if (args[1] is IComboSuggestionProvider provider)
|
||||
{
|
||||
IEnumerable list = provider.GetSuggestions(searchText);
|
||||
_actb.Dispatcher.BeginInvoke(new Action<IEnumerable, string>(DisplaySuggestions), DispatcherPriority.Background, list, searchText);
|
||||
}
|
||||
}
|
||||
}
|
||||
private void GetFullCollectionAsync(object param)
|
||||
{
|
||||
if (param is IComboSuggestionProvider provider)
|
||||
{
|
||||
IEnumerable list = provider.GetFullCollection();
|
||||
_actb.Dispatcher.BeginInvoke(new Action<IEnumerable, string>(DisplaySuggestions), DispatcherPriority.Background, list, string.Empty);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
569
AutoCompleteTextBox/Editors/AutoCompleteTextBox.cs
Normal file
569
AutoCompleteTextBox/Editors/AutoCompleteTextBox.cs
Normal file
@@ -0,0 +1,569 @@
|
||||
using System;
|
||||
using System.Collections;
|
||||
using System.Threading;
|
||||
using System.Windows;
|
||||
using System.Windows.Controls;
|
||||
using System.Windows.Controls.Primitives;
|
||||
using System.Windows.Data;
|
||||
using System.Windows.Input;
|
||||
using System.Windows.Media;
|
||||
using System.Windows.Threading;
|
||||
|
||||
namespace AutoCompleteTextBox.Editors
|
||||
{
|
||||
[TemplatePart(Name = PartEditor, Type = typeof(TextBox))]
|
||||
[TemplatePart(Name = PartPopup, Type = typeof(Popup))]
|
||||
[TemplatePart(Name = PartSelector, Type = typeof(Selector))]
|
||||
public class AutoCompleteTextBox : Control
|
||||
{
|
||||
|
||||
#region "Fields"
|
||||
|
||||
public const string PartEditor = "PART_Editor";
|
||||
public const string PartPopup = "PART_Popup";
|
||||
|
||||
public const string PartSelector = "PART_Selector";
|
||||
public static readonly DependencyProperty DelayProperty = DependencyProperty.Register("Delay", typeof(int), typeof(AutoCompleteTextBox), new FrameworkPropertyMetadata(200));
|
||||
public static readonly DependencyProperty DisplayMemberProperty = DependencyProperty.Register("DisplayMember", typeof(string), typeof(AutoCompleteTextBox), new FrameworkPropertyMetadata(string.Empty));
|
||||
public static readonly DependencyProperty IconPlacementProperty = DependencyProperty.Register("IconPlacement", typeof(IconPlacement), typeof(AutoCompleteTextBox), new FrameworkPropertyMetadata(IconPlacement.Left));
|
||||
public static readonly DependencyProperty IconProperty = DependencyProperty.Register("Icon", typeof(object), typeof(AutoCompleteTextBox), new FrameworkPropertyMetadata(null));
|
||||
public static readonly DependencyProperty IconVisibilityProperty = DependencyProperty.Register("IconVisibility", typeof(Visibility), typeof(AutoCompleteTextBox), new FrameworkPropertyMetadata(Visibility.Visible));
|
||||
public static readonly DependencyProperty IsDropDownOpenProperty = DependencyProperty.Register("IsDropDownOpen", typeof(bool), typeof(AutoCompleteTextBox), new FrameworkPropertyMetadata(false));
|
||||
public static readonly DependencyProperty IsLoadingProperty = DependencyProperty.Register("IsLoading", typeof(bool), typeof(AutoCompleteTextBox), new FrameworkPropertyMetadata(false));
|
||||
public static readonly DependencyProperty IsReadOnlyProperty = DependencyProperty.Register("IsReadOnly", typeof(bool), typeof(AutoCompleteTextBox), new FrameworkPropertyMetadata(false));
|
||||
public static readonly DependencyProperty ItemTemplateProperty = DependencyProperty.Register("ItemTemplate", typeof(DataTemplate), typeof(AutoCompleteTextBox), new FrameworkPropertyMetadata(null));
|
||||
public static readonly DependencyProperty ItemTemplateSelectorProperty = DependencyProperty.Register("ItemTemplateSelector", typeof(DataTemplateSelector), typeof(AutoCompleteTextBox));
|
||||
public static readonly DependencyProperty LoadingContentProperty = DependencyProperty.Register("LoadingContent", typeof(object), typeof(AutoCompleteTextBox), new FrameworkPropertyMetadata(null));
|
||||
public static readonly DependencyProperty ProviderProperty = DependencyProperty.Register("Provider", typeof(ISuggestionProvider), typeof(AutoCompleteTextBox), new FrameworkPropertyMetadata(null));
|
||||
public static readonly DependencyProperty SelectedItemProperty = DependencyProperty.Register("SelectedItem", typeof(object), typeof(AutoCompleteTextBox), new FrameworkPropertyMetadata(null, OnSelectedItemChanged));
|
||||
public static readonly DependencyProperty TextProperty = DependencyProperty.Register("Text", typeof(string), typeof(AutoCompleteTextBox), new FrameworkPropertyMetadata(string.Empty, propertyChangedCallback:null,coerceValueCallback:null, isAnimationProhibited:false, defaultUpdateSourceTrigger: UpdateSourceTrigger.LostFocus, flags: FrameworkPropertyMetadataOptions.BindsTwoWayByDefault));
|
||||
public static readonly DependencyProperty FilterProperty = DependencyProperty.Register("Filter", typeof(string), typeof(AutoCompleteTextBox), new FrameworkPropertyMetadata(string.Empty));
|
||||
public static readonly DependencyProperty MaxLengthProperty = DependencyProperty.Register("MaxLength", typeof(int), typeof(AutoCompleteTextBox), new FrameworkPropertyMetadata(0));
|
||||
public static readonly DependencyProperty CharacterCasingProperty = DependencyProperty.Register("CharacterCasing", typeof(CharacterCasing), typeof(AutoCompleteTextBox), new FrameworkPropertyMetadata(CharacterCasing.Normal));
|
||||
public static readonly DependencyProperty MaxPopUpHeightProperty = DependencyProperty.Register("MaxPopUpHeight", typeof(int), typeof(AutoCompleteTextBox), new FrameworkPropertyMetadata(600));
|
||||
public static readonly DependencyProperty MaxPopUpWidthProperty = DependencyProperty.Register("MaxPopUpWidth", typeof(int), typeof(AutoCompleteTextBox), new FrameworkPropertyMetadata(2000));
|
||||
|
||||
public static readonly DependencyProperty WatermarkProperty = DependencyProperty.Register("Watermark", typeof(string), typeof(AutoCompleteTextBox), new FrameworkPropertyMetadata(string.Empty));
|
||||
|
||||
public static readonly DependencyProperty SuggestionBackgroundProperty = DependencyProperty.Register("SuggestionBackground", typeof(Brush), typeof(AutoCompleteTextBox), new FrameworkPropertyMetadata(Brushes.White));
|
||||
private bool _isUpdatingText;
|
||||
private bool _selectionCancelled;
|
||||
|
||||
private SuggestionsAdapter _suggestionsAdapter;
|
||||
|
||||
|
||||
#endregion
|
||||
|
||||
#region "Constructors"
|
||||
|
||||
static AutoCompleteTextBox()
|
||||
{
|
||||
DefaultStyleKeyProperty.OverrideMetadata(typeof(AutoCompleteTextBox), new FrameworkPropertyMetadata(typeof(AutoCompleteTextBox)));
|
||||
FocusableProperty.OverrideMetadata(typeof(AutoCompleteTextBox), new FrameworkPropertyMetadata(true));
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region "Properties"
|
||||
|
||||
|
||||
public int MaxPopupHeight
|
||||
{
|
||||
get => (int)GetValue(MaxPopUpHeightProperty);
|
||||
set => SetValue(MaxPopUpHeightProperty, value);
|
||||
}
|
||||
public int MaxPopupWidth
|
||||
{
|
||||
get => (int)GetValue(MaxPopUpWidthProperty);
|
||||
set => SetValue(MaxPopUpWidthProperty, value);
|
||||
}
|
||||
|
||||
public BindingEvaluator BindingEvaluator { get; set; }
|
||||
|
||||
public CharacterCasing CharacterCasing
|
||||
{
|
||||
get => (CharacterCasing)GetValue(CharacterCasingProperty);
|
||||
set => SetValue(CharacterCasingProperty, value);
|
||||
}
|
||||
|
||||
public int MaxLength
|
||||
{
|
||||
get => (int)GetValue(MaxLengthProperty);
|
||||
set => SetValue(MaxLengthProperty, value);
|
||||
}
|
||||
|
||||
public int Delay
|
||||
{
|
||||
get => (int)GetValue(DelayProperty);
|
||||
|
||||
set => SetValue(DelayProperty, value);
|
||||
}
|
||||
|
||||
public string DisplayMember
|
||||
{
|
||||
get => (string)GetValue(DisplayMemberProperty);
|
||||
|
||||
set => SetValue(DisplayMemberProperty, value);
|
||||
}
|
||||
|
||||
public TextBox Editor { get; set; }
|
||||
|
||||
public DispatcherTimer FetchTimer { get; set; }
|
||||
|
||||
public string Filter
|
||||
{
|
||||
get => (string)GetValue(FilterProperty);
|
||||
|
||||
set => SetValue(FilterProperty, value);
|
||||
}
|
||||
|
||||
public object Icon
|
||||
{
|
||||
get => GetValue(IconProperty);
|
||||
|
||||
set => SetValue(IconProperty, value);
|
||||
}
|
||||
|
||||
public IconPlacement IconPlacement
|
||||
{
|
||||
get => (IconPlacement)GetValue(IconPlacementProperty);
|
||||
|
||||
set => SetValue(IconPlacementProperty, value);
|
||||
}
|
||||
|
||||
public Visibility IconVisibility
|
||||
{
|
||||
get => (Visibility)GetValue(IconVisibilityProperty);
|
||||
|
||||
set => SetValue(IconVisibilityProperty, value);
|
||||
}
|
||||
|
||||
public bool IsDropDownOpen
|
||||
{
|
||||
get => (bool)GetValue(IsDropDownOpenProperty);
|
||||
|
||||
set => SetValue(IsDropDownOpenProperty, value);
|
||||
}
|
||||
|
||||
public bool IsLoading
|
||||
{
|
||||
get => (bool)GetValue(IsLoadingProperty);
|
||||
|
||||
set => SetValue(IsLoadingProperty, value);
|
||||
}
|
||||
|
||||
public bool IsReadOnly
|
||||
{
|
||||
get => (bool)GetValue(IsReadOnlyProperty);
|
||||
|
||||
set => SetValue(IsReadOnlyProperty, value);
|
||||
}
|
||||
|
||||
public Selector ItemsSelector { get; set; }
|
||||
|
||||
public DataTemplate ItemTemplate
|
||||
{
|
||||
get => (DataTemplate)GetValue(ItemTemplateProperty);
|
||||
|
||||
set => SetValue(ItemTemplateProperty, value);
|
||||
}
|
||||
|
||||
public DataTemplateSelector ItemTemplateSelector
|
||||
{
|
||||
get => ((DataTemplateSelector)(GetValue(ItemTemplateSelectorProperty)));
|
||||
set => SetValue(ItemTemplateSelectorProperty, value);
|
||||
}
|
||||
|
||||
public object LoadingContent
|
||||
{
|
||||
get => GetValue(LoadingContentProperty);
|
||||
|
||||
set => SetValue(LoadingContentProperty, value);
|
||||
}
|
||||
|
||||
public Popup Popup { get; set; }
|
||||
|
||||
public ISuggestionProvider Provider
|
||||
{
|
||||
get => (ISuggestionProvider)GetValue(ProviderProperty);
|
||||
|
||||
set => SetValue(ProviderProperty, value);
|
||||
}
|
||||
|
||||
public object SelectedItem
|
||||
{
|
||||
get => GetValue(SelectedItemProperty);
|
||||
|
||||
set => SetValue(SelectedItemProperty, value);
|
||||
}
|
||||
|
||||
public SelectionAdapter SelectionAdapter { get; set; }
|
||||
|
||||
public string Text
|
||||
{
|
||||
get => (string)GetValue(TextProperty);
|
||||
|
||||
set => SetValue(TextProperty, value);
|
||||
}
|
||||
|
||||
public string Watermark
|
||||
{
|
||||
get => (string)GetValue(WatermarkProperty);
|
||||
|
||||
set => SetValue(WatermarkProperty, value);
|
||||
}
|
||||
public Brush SuggestionBackground
|
||||
{
|
||||
get => (Brush)GetValue(SuggestionBackgroundProperty);
|
||||
|
||||
set => SetValue(SuggestionBackgroundProperty, value);
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region "Methods"
|
||||
|
||||
public static void OnSelectedItemChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
|
||||
{
|
||||
AutoCompleteTextBox act = null;
|
||||
act = d as AutoCompleteTextBox;
|
||||
if (act != null)
|
||||
{
|
||||
if (act.Editor != null & !act._isUpdatingText)
|
||||
{
|
||||
act._isUpdatingText = true;
|
||||
act.Editor.Text = act.BindingEvaluator.Evaluate(e.NewValue);
|
||||
act._isUpdatingText = false;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private void ScrollToSelectedItem()
|
||||
{
|
||||
if (ItemsSelector is ListBox listBox && listBox.SelectedItem != null)
|
||||
listBox.ScrollIntoView(listBox.SelectedItem);
|
||||
}
|
||||
|
||||
public new BindingExpressionBase SetBinding(DependencyProperty dp, BindingBase binding){
|
||||
var res = base.SetBinding(dp, binding);
|
||||
CheckForParentTextBindingChange();
|
||||
return res;
|
||||
}
|
||||
public new BindingExpressionBase SetBinding(DependencyProperty dp, String path) {
|
||||
var res = base.SetBinding(dp, path);
|
||||
CheckForParentTextBindingChange();
|
||||
return res;
|
||||
}
|
||||
public new void ClearValue(DependencyPropertyKey key) {
|
||||
base.ClearValue(key);
|
||||
CheckForParentTextBindingChange();
|
||||
}
|
||||
public new void ClearValue(DependencyProperty dp) {
|
||||
base.ClearValue(dp);
|
||||
CheckForParentTextBindingChange();
|
||||
}
|
||||
private void CheckForParentTextBindingChange(bool force=false) {
|
||||
var CurrentBindingMode = BindingOperations.GetBinding(this, TextProperty)?.UpdateSourceTrigger ?? UpdateSourceTrigger.Default;
|
||||
if (CurrentBindingMode != UpdateSourceTrigger.PropertyChanged)//preventing going any less frequent than property changed
|
||||
CurrentBindingMode = UpdateSourceTrigger.Default;
|
||||
|
||||
|
||||
if (CurrentBindingMode == CurrentTextboxTextBindingUpdateMode && force == false)
|
||||
return;
|
||||
var binding = new Binding {
|
||||
Mode = BindingMode.TwoWay,
|
||||
UpdateSourceTrigger = CurrentBindingMode,
|
||||
Path = new PropertyPath(nameof(Text)),
|
||||
RelativeSource = new RelativeSource(RelativeSourceMode.TemplatedParent),
|
||||
};
|
||||
CurrentTextboxTextBindingUpdateMode = CurrentBindingMode;
|
||||
Editor?.SetBinding(TextBox.TextProperty, binding);
|
||||
}
|
||||
|
||||
private UpdateSourceTrigger CurrentTextboxTextBindingUpdateMode;
|
||||
public override void OnApplyTemplate()
|
||||
{
|
||||
base.OnApplyTemplate();
|
||||
|
||||
Editor = Template.FindName(PartEditor, this) as TextBox;
|
||||
Editor.Focus();
|
||||
Popup = Template.FindName(PartPopup, this) as Popup;
|
||||
ItemsSelector = Template.FindName(PartSelector, this) as Selector;
|
||||
BindingEvaluator = new BindingEvaluator(new Binding(DisplayMember));
|
||||
|
||||
if (Editor != null)
|
||||
{
|
||||
Editor.TextChanged += OnEditorTextChanged;
|
||||
Editor.PreviewKeyDown += OnEditorKeyDown;
|
||||
Editor.LostFocus += OnEditorLostFocus;
|
||||
CheckForParentTextBindingChange(true);
|
||||
|
||||
if (SelectedItem != null)
|
||||
{
|
||||
_isUpdatingText = true;
|
||||
Editor.Text = BindingEvaluator.Evaluate(SelectedItem);
|
||||
_isUpdatingText = false;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
GotFocus += AutoCompleteTextBox_GotFocus;
|
||||
GotKeyboardFocus += AutoCompleteTextBox_GotKeyboardFocus;
|
||||
|
||||
if (Popup != null)
|
||||
{
|
||||
Popup.StaysOpen = false;
|
||||
Popup.Opened += OnPopupOpened;
|
||||
Popup.Closed += OnPopupClosed;
|
||||
}
|
||||
if (ItemsSelector != null)
|
||||
{
|
||||
SelectionAdapter = new SelectionAdapter(ItemsSelector);
|
||||
SelectionAdapter.Commit += OnSelectionAdapterCommit;
|
||||
SelectionAdapter.Cancel += OnSelectionAdapterCancel;
|
||||
SelectionAdapter.SelectionChanged += OnSelectionAdapterSelectionChanged;
|
||||
ItemsSelector.PreviewMouseDown += ItemsSelector_PreviewMouseDown;
|
||||
}
|
||||
}
|
||||
private void ItemsSelector_PreviewMouseDown(object sender, MouseButtonEventArgs e)
|
||||
{
|
||||
if ((e.OriginalSource as FrameworkElement)?.DataContext == null)
|
||||
return;
|
||||
if (!ItemsSelector.Items.Contains(((FrameworkElement)e.OriginalSource)?.DataContext))
|
||||
return;
|
||||
ItemsSelector.SelectedItem = ((FrameworkElement)e.OriginalSource)?.DataContext;
|
||||
OnSelectionAdapterCommit(SelectionAdapter.EventCause.MouseDown);
|
||||
e.Handled = true;
|
||||
}
|
||||
private void AutoCompleteTextBox_GotFocus(object sender, RoutedEventArgs e)
|
||||
{
|
||||
Editor?.Focus();
|
||||
}
|
||||
private void AutoCompleteTextBox_GotKeyboardFocus(object sender, KeyboardFocusChangedEventArgs e) {
|
||||
if (e.NewFocus != this)
|
||||
return;
|
||||
if (e.OldFocus == Editor)
|
||||
MoveFocus(new TraversalRequest(FocusNavigationDirection.Previous));
|
||||
|
||||
}
|
||||
|
||||
private string GetDisplayText(object dataItem)
|
||||
{
|
||||
if (BindingEvaluator == null)
|
||||
{
|
||||
BindingEvaluator = new BindingEvaluator(new Binding(DisplayMember));
|
||||
}
|
||||
if (dataItem == null)
|
||||
{
|
||||
return string.Empty;
|
||||
}
|
||||
if (string.IsNullOrEmpty(DisplayMember))
|
||||
{
|
||||
return dataItem.ToString();
|
||||
}
|
||||
return BindingEvaluator.Evaluate(dataItem);
|
||||
}
|
||||
|
||||
private void OnEditorKeyDown(object sender, KeyEventArgs e)
|
||||
{
|
||||
if (SelectionAdapter != null)
|
||||
{
|
||||
if (IsDropDownOpen)
|
||||
SelectionAdapter.HandleKeyDown(e);
|
||||
else
|
||||
IsDropDownOpen = e.Key == Key.Down || e.Key == Key.Up;
|
||||
}
|
||||
}
|
||||
|
||||
private void OnEditorLostFocus(object sender, RoutedEventArgs e)
|
||||
{
|
||||
if (!IsKeyboardFocusWithin)
|
||||
{
|
||||
IsDropDownOpen = false;
|
||||
}
|
||||
}
|
||||
|
||||
private void OnEditorTextChanged(object sender, TextChangedEventArgs e)
|
||||
{
|
||||
Text = Editor.Text;
|
||||
if (_isUpdatingText)
|
||||
return;
|
||||
if (FetchTimer == null)
|
||||
{
|
||||
FetchTimer = new DispatcherTimer { Interval = TimeSpan.FromMilliseconds(Delay) };
|
||||
FetchTimer.Tick += OnFetchTimerTick;
|
||||
}
|
||||
FetchTimer.IsEnabled = false;
|
||||
FetchTimer.Stop();
|
||||
SetSelectedItem(null);
|
||||
if (Editor.Text.Length > 0)
|
||||
{
|
||||
FetchTimer.IsEnabled = true;
|
||||
FetchTimer.Start();
|
||||
}
|
||||
else
|
||||
{
|
||||
IsDropDownOpen = false;
|
||||
}
|
||||
}
|
||||
|
||||
private void OnFetchTimerTick(object sender, EventArgs e)
|
||||
{
|
||||
FetchTimer.IsEnabled = false;
|
||||
FetchTimer.Stop();
|
||||
if (Provider != null && ItemsSelector != null)
|
||||
{
|
||||
Filter = Editor.Text;
|
||||
if (_suggestionsAdapter == null)
|
||||
{
|
||||
_suggestionsAdapter = new SuggestionsAdapter(this);
|
||||
}
|
||||
_suggestionsAdapter.GetSuggestions(Filter);
|
||||
}
|
||||
}
|
||||
|
||||
private void OnPopupClosed(object sender, EventArgs e)
|
||||
{
|
||||
if (!_selectionCancelled)
|
||||
{
|
||||
OnSelectionAdapterCommit(SelectionAdapter.EventCause.PopupClosed);
|
||||
}
|
||||
}
|
||||
|
||||
private void OnPopupOpened(object sender, EventArgs e)
|
||||
{
|
||||
_selectionCancelled = false;
|
||||
ItemsSelector.SelectedItem = SelectedItem;
|
||||
}
|
||||
|
||||
private void OnSelectionAdapterCancel(SelectionAdapter.EventCause cause)
|
||||
{
|
||||
if (PreSelectionEventSomeoneHandled(cause, true))
|
||||
return;
|
||||
|
||||
_isUpdatingText = true;
|
||||
Editor.Text = SelectedItem == null ? Filter : GetDisplayText(SelectedItem);
|
||||
Editor.SelectionStart = Editor.Text.Length;
|
||||
Editor.SelectionLength = 0;
|
||||
_isUpdatingText = false;
|
||||
IsDropDownOpen = false;
|
||||
_selectionCancelled = true;
|
||||
|
||||
}
|
||||
|
||||
public event EventHandler<SelectionAdapter.PreSelectionAdapterFinishArgs> PreSelectionAdapterFinish;
|
||||
private bool PreSelectionEventSomeoneHandled(SelectionAdapter.EventCause cause, bool is_cancel) {
|
||||
if (PreSelectionAdapterFinish == null)
|
||||
return false;
|
||||
var args = new SelectionAdapter.PreSelectionAdapterFinishArgs { cause = cause, is_cancel = is_cancel };
|
||||
PreSelectionAdapterFinish?.Invoke(this, args);
|
||||
return args.handled;
|
||||
|
||||
}
|
||||
private void OnSelectionAdapterCommit(SelectionAdapter.EventCause cause)
|
||||
{
|
||||
if (PreSelectionEventSomeoneHandled(cause, false))
|
||||
return;
|
||||
|
||||
if (ItemsSelector.SelectedItem != null)
|
||||
{
|
||||
SelectedItem = ItemsSelector.SelectedItem;
|
||||
_isUpdatingText = true;
|
||||
Editor.Text = GetDisplayText(ItemsSelector.SelectedItem);
|
||||
SetSelectedItem(ItemsSelector.SelectedItem);
|
||||
_isUpdatingText = false;
|
||||
IsDropDownOpen = false;
|
||||
}
|
||||
}
|
||||
|
||||
private void OnSelectionAdapterSelectionChanged()
|
||||
{
|
||||
_isUpdatingText = true;
|
||||
Editor.Text = ItemsSelector.SelectedItem == null ? Filter : GetDisplayText(ItemsSelector.SelectedItem);
|
||||
Editor.SelectionStart = Editor.Text.Length;
|
||||
Editor.SelectionLength = 0;
|
||||
ScrollToSelectedItem();
|
||||
_isUpdatingText = false;
|
||||
}
|
||||
|
||||
private void SetSelectedItem(object item)
|
||||
{
|
||||
_isUpdatingText = true;
|
||||
SelectedItem = item;
|
||||
_isUpdatingText = false;
|
||||
}
|
||||
#endregion
|
||||
|
||||
#region "Nested Types"
|
||||
|
||||
private class SuggestionsAdapter
|
||||
{
|
||||
|
||||
#region "Fields"
|
||||
|
||||
private readonly AutoCompleteTextBox _actb;
|
||||
|
||||
private string _filter;
|
||||
#endregion
|
||||
|
||||
#region "Constructors"
|
||||
|
||||
public SuggestionsAdapter(AutoCompleteTextBox actb)
|
||||
{
|
||||
_actb = actb;
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region "Methods"
|
||||
|
||||
public void GetSuggestions(string searchText)
|
||||
{
|
||||
_filter = searchText;
|
||||
_actb.IsLoading = true;
|
||||
// Do not open drop down if control is not focused
|
||||
if (_actb.IsKeyboardFocusWithin)
|
||||
_actb.IsDropDownOpen = true;
|
||||
_actb.ItemsSelector.ItemsSource = null;
|
||||
ParameterizedThreadStart thInfo = GetSuggestionsAsync;
|
||||
Thread th = new Thread(thInfo);
|
||||
th.Start(new object[] { searchText, _actb.Provider });
|
||||
}
|
||||
|
||||
private void DisplaySuggestions(IEnumerable suggestions, string filter)
|
||||
{
|
||||
if (_filter != filter)
|
||||
{
|
||||
return;
|
||||
}
|
||||
_actb.IsLoading = false;
|
||||
_actb.ItemsSelector.ItemsSource = suggestions;
|
||||
// Close drop down if there are no items
|
||||
if (_actb.IsDropDownOpen)
|
||||
{
|
||||
_actb.IsDropDownOpen = _actb.ItemsSelector.HasItems;
|
||||
}
|
||||
}
|
||||
|
||||
private void GetSuggestionsAsync(object param)
|
||||
{
|
||||
if (param is object[] args)
|
||||
{
|
||||
string searchText = Convert.ToString(args[0]);
|
||||
if (args[1] is ISuggestionProvider provider)
|
||||
{
|
||||
IEnumerable list = provider.GetSuggestions(searchText);
|
||||
_actb.Dispatcher.BeginInvoke(new Action<IEnumerable, string>(DisplaySuggestions), DispatcherPriority.Background, list, searchText);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
16
AutoCompleteTextBox/Editors/IComboSuggestionProvider.cs
Normal file
16
AutoCompleteTextBox/Editors/IComboSuggestionProvider.cs
Normal file
@@ -0,0 +1,16 @@
|
||||
using System.Collections;
|
||||
|
||||
|
||||
namespace AutoCompleteTextBox.Editors
|
||||
{
|
||||
public interface IComboSuggestionProvider
|
||||
{
|
||||
|
||||
#region Public Methods
|
||||
|
||||
IEnumerable GetSuggestions(string filter);
|
||||
IEnumerable GetFullCollection();
|
||||
|
||||
#endregion Public Methods
|
||||
}
|
||||
}
|
||||
15
AutoCompleteTextBox/Editors/ISuggestionProvider.cs
Normal file
15
AutoCompleteTextBox/Editors/ISuggestionProvider.cs
Normal file
@@ -0,0 +1,15 @@
|
||||
using System.Collections;
|
||||
|
||||
namespace AutoCompleteTextBox.Editors
|
||||
{
|
||||
public interface ISuggestionProvider
|
||||
{
|
||||
|
||||
#region Public Methods
|
||||
|
||||
IEnumerable GetSuggestions(string filter);
|
||||
|
||||
#endregion Public Methods
|
||||
|
||||
}
|
||||
}
|
||||
122
AutoCompleteTextBox/Editors/SelectionAdapter.cs
Normal file
122
AutoCompleteTextBox/Editors/SelectionAdapter.cs
Normal file
@@ -0,0 +1,122 @@
|
||||
using System.Diagnostics;
|
||||
using System.Windows.Controls.Primitives;
|
||||
using System.Windows.Input;
|
||||
|
||||
namespace AutoCompleteTextBox.Editors
|
||||
{
|
||||
public class SelectionAdapter
|
||||
{
|
||||
public class PreSelectionAdapterFinishArgs {
|
||||
public EventCause cause;
|
||||
public bool is_cancel;
|
||||
public bool handled;
|
||||
}
|
||||
|
||||
#region "Fields"
|
||||
#endregion
|
||||
|
||||
#region "Constructors"
|
||||
|
||||
public SelectionAdapter(Selector selector)
|
||||
{
|
||||
SelectorControl = selector;
|
||||
SelectorControl.PreviewMouseUp += OnSelectorMouseDown;
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region "Events"
|
||||
|
||||
public enum EventCause { Other, PopupClosed, ItemClicked, EnterPressed, EscapePressed, TabPressed, MouseDown}
|
||||
public delegate void CancelEventHandler(EventCause cause);
|
||||
|
||||
public delegate void CommitEventHandler(EventCause cause);
|
||||
|
||||
public delegate void SelectionChangedEventHandler();
|
||||
|
||||
public event CancelEventHandler Cancel;
|
||||
public event CommitEventHandler Commit;
|
||||
public event SelectionChangedEventHandler SelectionChanged;
|
||||
#endregion
|
||||
|
||||
#region "Properties"
|
||||
|
||||
public Selector SelectorControl { get; set; }
|
||||
|
||||
#endregion
|
||||
|
||||
#region "Methods"
|
||||
|
||||
public void HandleKeyDown(KeyEventArgs key)
|
||||
{
|
||||
switch (key.Key)
|
||||
{
|
||||
case Key.Down:
|
||||
IncrementSelection();
|
||||
break;
|
||||
case Key.Up:
|
||||
DecrementSelection();
|
||||
break;
|
||||
case Key.Enter:
|
||||
Commit?.Invoke(EventCause.EnterPressed);
|
||||
|
||||
break;
|
||||
case Key.Escape:
|
||||
Cancel?.Invoke(EventCause.EscapePressed);
|
||||
|
||||
break;
|
||||
case Key.Tab:
|
||||
Commit?.Invoke(EventCause.TabPressed);
|
||||
|
||||
break;
|
||||
default:
|
||||
return;
|
||||
}
|
||||
key.Handled = true;
|
||||
}
|
||||
|
||||
private void DecrementSelection()
|
||||
{
|
||||
if (SelectorControl.SelectedIndex == -1)
|
||||
{
|
||||
SelectorControl.SelectedIndex = SelectorControl.Items.Count - 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
SelectorControl.SelectedIndex -= 1;
|
||||
}
|
||||
|
||||
SelectionChanged?.Invoke();
|
||||
}
|
||||
|
||||
private void IncrementSelection()
|
||||
{
|
||||
if (SelectorControl.SelectedIndex == SelectorControl.Items.Count - 1)
|
||||
{
|
||||
SelectorControl.SelectedIndex = -1;
|
||||
}
|
||||
else
|
||||
{
|
||||
SelectorControl.SelectedIndex += 1;
|
||||
}
|
||||
|
||||
SelectionChanged?.Invoke();
|
||||
}
|
||||
|
||||
private void OnSelectorMouseDown(object sender, MouseButtonEventArgs e)
|
||||
{
|
||||
// If sender is the RepeatButton from the scrollbar we need to
|
||||
// to skip this event otherwise focus get stuck in the RepeatButton
|
||||
// and list is scrolled up or down til the end.
|
||||
if (e.OriginalSource.GetType() != typeof(RepeatButton))
|
||||
{
|
||||
Commit?.Invoke(EventCause.MouseDown);
|
||||
e.Handled = true;
|
||||
}
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
35
AutoCompleteTextBox/Editors/SuggestionProvider.cs
Normal file
35
AutoCompleteTextBox/Editors/SuggestionProvider.cs
Normal file
@@ -0,0 +1,35 @@
|
||||
using System;
|
||||
using System.Collections;
|
||||
|
||||
namespace AutoCompleteTextBox.Editors
|
||||
{
|
||||
public class SuggestionProvider : ISuggestionProvider
|
||||
{
|
||||
|
||||
|
||||
#region Private Fields
|
||||
|
||||
private readonly Func<string, IEnumerable> _method;
|
||||
|
||||
#endregion Private Fields
|
||||
|
||||
#region Public Constructors
|
||||
|
||||
public SuggestionProvider(Func<string, IEnumerable> method)
|
||||
{
|
||||
_method = method ?? throw new ArgumentNullException(nameof(method));
|
||||
}
|
||||
|
||||
#endregion Public Constructors
|
||||
|
||||
#region Public Methods
|
||||
|
||||
public IEnumerable GetSuggestions(string filter)
|
||||
{
|
||||
return _method(filter);
|
||||
}
|
||||
|
||||
#endregion Public Methods
|
||||
|
||||
}
|
||||
}
|
||||
268
AutoCompleteTextBox/Editors/Themes/Generic.xaml
Normal file
268
AutoCompleteTextBox/Editors/Themes/Generic.xaml
Normal file
@@ -0,0 +1,268 @@
|
||||
<ResourceDictionary
|
||||
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
|
||||
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
|
||||
xmlns:editors="clr-namespace:AutoCompleteTextBox.Editors">
|
||||
|
||||
<BooleanToVisibilityConverter x:Key="BoolToVisConverter" />
|
||||
|
||||
<Style x:Key="TextBoxSuggestionItemStyle" TargetType="ListBoxItem">
|
||||
<Setter Property="Template">
|
||||
<Setter.Value>
|
||||
<ControlTemplate TargetType="ListBoxItem">
|
||||
<Border x:Name="ContentBorder" Background="{Binding Path=SuggestionBackground, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=editors:AutoCompleteTextBox}, Mode=OneWay}">
|
||||
<ContentPresenter />
|
||||
</Border>
|
||||
<ControlTemplate.Triggers>
|
||||
<Trigger Property="IsMouseOver" Value="True">
|
||||
<Setter Property="IsSelected" Value="True" />
|
||||
</Trigger>
|
||||
<Trigger Property="IsSelected" Value="True">
|
||||
<Setter TargetName="ContentBorder" Property="Background" Value="{x:Static SystemColors.HighlightBrush}" />
|
||||
<Setter Property="TextElement.Foreground" Value="{x:Static SystemColors.HighlightTextBrush}" />
|
||||
</Trigger>
|
||||
</ControlTemplate.Triggers>
|
||||
</ControlTemplate>
|
||||
</Setter.Value>
|
||||
</Setter>
|
||||
</Style>
|
||||
|
||||
<Style x:Key="ComboBoxSuggestionItemStyle" TargetType="ListBoxItem">
|
||||
<Setter Property="Template">
|
||||
<Setter.Value>
|
||||
<ControlTemplate TargetType="ListBoxItem">
|
||||
<Border x:Name="ContentBorder" Background="{Binding Path=SuggestionBackground, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=editors:AutoCompleteComboBox}, Mode=OneWay}">
|
||||
<ContentPresenter />
|
||||
</Border>
|
||||
<ControlTemplate.Triggers>
|
||||
<Trigger Property="IsMouseOver" Value="True">
|
||||
<Setter Property="IsSelected" Value="True" />
|
||||
</Trigger>
|
||||
<Trigger Property="IsSelected" Value="True">
|
||||
<Setter TargetName="ContentBorder" Property="Background" Value="{x:Static SystemColors.HighlightBrush}" />
|
||||
<Setter Property="TextElement.Foreground" Value="{x:Static SystemColors.HighlightTextBrush}" />
|
||||
</Trigger>
|
||||
</ControlTemplate.Triggers>
|
||||
</ControlTemplate>
|
||||
</Setter.Value>
|
||||
</Setter>
|
||||
</Style>
|
||||
|
||||
<Style x:Key="TransparentTextBoxStyle" TargetType="{x:Type TextBox}">
|
||||
<Setter Property="FocusVisualStyle" Value="{x:Null}" />
|
||||
<Setter Property="Template">
|
||||
<Setter.Value>
|
||||
<ControlTemplate TargetType="{x:Type TextBox}">
|
||||
<Grid>
|
||||
<ScrollViewer
|
||||
x:Name="PART_ContentHost"
|
||||
Background="Transparent"
|
||||
CanContentScroll="True"
|
||||
Focusable="True"
|
||||
HorizontalScrollBarVisibility="Hidden"
|
||||
VerticalScrollBarVisibility="Hidden" />
|
||||
</Grid>
|
||||
</ControlTemplate>
|
||||
</Setter.Value>
|
||||
</Setter>
|
||||
</Style>
|
||||
|
||||
<Style TargetType="{x:Type editors:AutoCompleteTextBox}">
|
||||
<Setter Property="BorderThickness" Value="1" />
|
||||
<Setter Property="BorderBrush" Value="#FFABADB3" />
|
||||
<Setter Property="SuggestionBackground" Value="White" />
|
||||
<Setter Property="HorizontalContentAlignment" Value="Left" />
|
||||
<Setter Property="VerticalContentAlignment" Value="Top" />
|
||||
<Setter Property="AllowDrop" Value="true" />
|
||||
<Setter Property="ScrollViewer.PanningMode" Value="VerticalFirst" />
|
||||
<Setter Property="Stylus.IsFlicksEnabled" Value="False" />
|
||||
<Setter Property="Validation.ErrorTemplate" Value="{x:Null}" />
|
||||
<Setter Property="Template">
|
||||
<Setter.Value>
|
||||
<ControlTemplate TargetType="{x:Type editors:AutoCompleteTextBox}">
|
||||
<Border
|
||||
Background="{TemplateBinding Background}"
|
||||
BorderBrush="{TemplateBinding BorderBrush}"
|
||||
BorderThickness="{TemplateBinding BorderThickness}"
|
||||
CornerRadius="0">
|
||||
<Grid>
|
||||
<DockPanel>
|
||||
<ContentPresenter
|
||||
x:Name="PART_Icon"
|
||||
ContentSource="Icon"
|
||||
Visibility="{TemplateBinding IconVisibility}" />
|
||||
<Grid>
|
||||
<TextBlock
|
||||
x:Name="PART_Watermark"
|
||||
Margin="3,0"
|
||||
HorizontalAlignment="Left"
|
||||
VerticalAlignment="Center"
|
||||
Focusable="False"
|
||||
Foreground="Gray"
|
||||
Text="{TemplateBinding Watermark}"
|
||||
Visibility="Collapsed" />
|
||||
<TextBox
|
||||
x:Name="PART_Editor"
|
||||
HorizontalAlignment="Stretch"
|
||||
VerticalAlignment="Center"
|
||||
CharacterCasing="{Binding Path=CharacterCasing, RelativeSource={RelativeSource Mode=TemplatedParent}, Mode=TwoWay}"
|
||||
Foreground="{Binding Path=Foreground, RelativeSource={RelativeSource Mode=TemplatedParent}, Mode=OneWay}"
|
||||
MaxLength="{Binding Path=MaxLength, RelativeSource={RelativeSource Mode=TemplatedParent}, Mode=TwoWay}"
|
||||
Style="{StaticResource ResourceKey=TransparentTextBoxStyle}" />
|
||||
</Grid>
|
||||
</DockPanel>
|
||||
<Popup
|
||||
x:Name="PART_Popup"
|
||||
MinWidth="{TemplateBinding ActualWidth}"
|
||||
MinHeight="25"
|
||||
MaxHeight="600"
|
||||
AllowsTransparency="True"
|
||||
Focusable="False"
|
||||
HorizontalOffset="0"
|
||||
IsOpen="{Binding Path=IsDropDownOpen, RelativeSource={RelativeSource Mode=TemplatedParent}, Mode=TwoWay}"
|
||||
PopupAnimation="Slide">
|
||||
<Border
|
||||
Padding="2"
|
||||
Background="{Binding Path=SuggestionBackground, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=editors:AutoCompleteTextBox}, Mode=OneWay}"
|
||||
BorderBrush="Gray"
|
||||
BorderThickness="1"
|
||||
CornerRadius="5">
|
||||
<Grid Background="{Binding Path=SuggestionBackground, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=editors:AutoCompleteTextBox}, Mode=OneWay}">
|
||||
<ListBox
|
||||
x:Name="PART_Selector"
|
||||
MaxWidth="{Binding Path=MaxPopupWidth, RelativeSource={RelativeSource Mode=TemplatedParent}, Mode=TwoWay}"
|
||||
MaxHeight="{Binding Path=MaxPopupHeight, RelativeSource={RelativeSource Mode=TemplatedParent}, Mode=TwoWay}"
|
||||
Background="{Binding Path=SuggestionBackground, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=editors:AutoCompleteTextBox}, Mode=OneWay}"
|
||||
BorderThickness="0"
|
||||
Focusable="False"
|
||||
ItemContainerStyle="{StaticResource ResourceKey=TextBoxSuggestionItemStyle}"
|
||||
ItemTemplate="{TemplateBinding ItemTemplate}"
|
||||
ItemTemplateSelector="{TemplateBinding ItemTemplateSelector}"
|
||||
ScrollViewer.HorizontalScrollBarVisibility="Auto"
|
||||
ScrollViewer.VerticalScrollBarVisibility="Auto" />
|
||||
<Border Visibility="{Binding Path=IsLoading, RelativeSource={RelativeSource Mode=TemplatedParent}, Converter={StaticResource ResourceKey=BoolToVisConverter}}">
|
||||
<ContentPresenter ContentSource="LoadingContent" />
|
||||
</Border>
|
||||
</Grid>
|
||||
</Border>
|
||||
</Popup>
|
||||
|
||||
</Grid>
|
||||
</Border>
|
||||
<ControlTemplate.Triggers>
|
||||
<Trigger SourceName="PART_Editor" Property="Text" Value="">
|
||||
<Setter TargetName="PART_Watermark" Property="Visibility" Value="Visible" />
|
||||
</Trigger>
|
||||
<Trigger Property="IconPlacement" Value="Left">
|
||||
<Setter TargetName="PART_Icon" Property="DockPanel.Dock" Value="Left" />
|
||||
</Trigger>
|
||||
<Trigger Property="IconPlacement" Value="Right">
|
||||
<Setter TargetName="PART_Icon" Property="DockPanel.Dock" Value="Right" />
|
||||
</Trigger>
|
||||
<Trigger Property="Validation.HasError" Value="True">
|
||||
<Setter Property="BorderBrush" Value="Red" />
|
||||
</Trigger>
|
||||
</ControlTemplate.Triggers>
|
||||
</ControlTemplate>
|
||||
</Setter.Value>
|
||||
</Setter>
|
||||
</Style>
|
||||
|
||||
<Style TargetType="editors:AutoCompleteComboBox">
|
||||
<Setter Property="Focusable" Value="True" />
|
||||
<Setter Property="SuggestionBackground" Value="White" />
|
||||
<Setter Property="BorderThickness" Value="0,0,0,1" />
|
||||
<Setter Property="Background" Value="Transparent" />
|
||||
<Setter Property="HorizontalContentAlignment" Value="Left" />
|
||||
<Setter Property="VerticalContentAlignment" Value="Top" />
|
||||
<Setter Property="FocusVisualStyle" Value="{x:Null}" />
|
||||
<Setter Property="AllowDrop" Value="true" />
|
||||
<Setter Property="ScrollViewer.PanningMode" Value="VerticalFirst" />
|
||||
<Setter Property="Stylus.IsFlicksEnabled" Value="False" />
|
||||
<Setter Property="Template">
|
||||
<Setter.Value>
|
||||
<ControlTemplate TargetType="{x:Type editors:AutoCompleteComboBox}">
|
||||
<Grid>
|
||||
<DockPanel>
|
||||
<ContentPresenter
|
||||
x:Name="PART_Icon"
|
||||
ContentSource="Icon"
|
||||
Visibility="{TemplateBinding IconVisibility}" />
|
||||
<Grid>
|
||||
<TextBlock
|
||||
x:Name="PART_Watermark"
|
||||
HorizontalAlignment="Left"
|
||||
VerticalAlignment="Center"
|
||||
DockPanel.Dock="Left"
|
||||
Focusable="False"
|
||||
Foreground="Gray"
|
||||
Text="{TemplateBinding Watermark}"
|
||||
Visibility="Collapsed" />
|
||||
<DockPanel Margin="3,0">
|
||||
<Expander x:Name="PART_Expander" DockPanel.Dock="Right" />
|
||||
<TextBox
|
||||
x:Name="PART_Editor"
|
||||
HorizontalAlignment="Stretch"
|
||||
VerticalAlignment="Center"
|
||||
CharacterCasing="{Binding Path=CharacterCasing, RelativeSource={RelativeSource Mode=TemplatedParent}, Mode=TwoWay}"
|
||||
Focusable="True"
|
||||
MaxLength="{Binding Path=MaxLength, RelativeSource={RelativeSource Mode=TemplatedParent}, Mode=TwoWay}" />
|
||||
</DockPanel>
|
||||
</Grid>
|
||||
</DockPanel>
|
||||
<Popup
|
||||
x:Name="PART_Popup"
|
||||
MinWidth="{TemplateBinding ActualWidth}"
|
||||
MinHeight="25"
|
||||
MaxHeight="600"
|
||||
AllowsTransparency="True"
|
||||
Focusable="False"
|
||||
HorizontalOffset="0"
|
||||
IsOpen="{Binding Path=IsDropDownOpen, RelativeSource={RelativeSource Mode=TemplatedParent}, Mode=TwoWay}"
|
||||
PopupAnimation="Slide">
|
||||
<Border
|
||||
Padding="2"
|
||||
Background="{Binding Path=SuggestionBackground, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=editors:AutoCompleteComboBox}, Mode=OneWay}"
|
||||
BorderBrush="Gray"
|
||||
BorderThickness="1"
|
||||
CornerRadius="5">
|
||||
<Grid>
|
||||
<ListBox
|
||||
x:Name="PART_Selector"
|
||||
MaxWidth="{Binding Path=MaxPopupWidth, RelativeSource={RelativeSource Mode=TemplatedParent}, Mode=TwoWay}"
|
||||
MaxHeight="{Binding Path=MaxPopupHeight, RelativeSource={RelativeSource Mode=TemplatedParent}, Mode=TwoWay}"
|
||||
Background="{Binding Path=SuggestionBackground, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=editors:AutoCompleteComboBox}, Mode=OneWay}"
|
||||
BorderThickness="0"
|
||||
Focusable="False"
|
||||
ItemContainerStyle="{StaticResource ResourceKey=ComboBoxSuggestionItemStyle}"
|
||||
ItemTemplate="{TemplateBinding ItemTemplate}"
|
||||
ItemTemplateSelector="{TemplateBinding ItemTemplateSelector}"
|
||||
ScrollViewer.HorizontalScrollBarVisibility="Auto"
|
||||
ScrollViewer.VerticalScrollBarVisibility="Auto" />
|
||||
<Border Visibility="{Binding Path=IsLoading, RelativeSource={RelativeSource Mode=TemplatedParent}, Converter={StaticResource ResourceKey=BoolToVisConverter}}">
|
||||
<ContentPresenter ContentSource="LoadingContent" />
|
||||
</Border>
|
||||
</Grid>
|
||||
</Border>
|
||||
</Popup>
|
||||
|
||||
</Grid>
|
||||
<!--</Border>-->
|
||||
<ControlTemplate.Triggers>
|
||||
<Trigger SourceName="PART_Editor" Property="Text" Value="">
|
||||
<Setter TargetName="PART_Watermark" Property="Visibility" Value="Visible" />
|
||||
</Trigger>
|
||||
<Trigger Property="IconPlacement" Value="Left">
|
||||
<Setter TargetName="PART_Icon" Property="DockPanel.Dock" Value="Left" />
|
||||
</Trigger>
|
||||
<Trigger Property="IconPlacement" Value="Right">
|
||||
<Setter TargetName="PART_Icon" Property="DockPanel.Dock" Value="Right" />
|
||||
</Trigger>
|
||||
<Trigger Property="Validation.HasError" Value="True">
|
||||
<Setter Property="BorderBrush" Value="Red" />
|
||||
</Trigger>
|
||||
</ControlTemplate.Triggers>
|
||||
</ControlTemplate>
|
||||
</Setter.Value>
|
||||
</Setter>
|
||||
</Style>
|
||||
</ResourceDictionary>
|
||||
Reference in New Issue
Block a user