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https://gitee.com/akwkevin/aistudio.-wpf.-diagram
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结构调整，便于后续扩展
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akwkevin
334
AIStudio.Wpf.BaseDiagram/Controls/MultiSelectComboBox.xaml.cs
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334
AIStudio.Wpf.BaseDiagram/Controls/MultiSelectComboBox.xaml.cs
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Data;
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using System.Windows.Documents;
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using System.Windows.Input;
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using System.Windows.Media;
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using System.Windows.Media.Imaging;
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using System.Windows.Navigation;
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using System.Windows.Shapes;
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using System.Collections.ObjectModel;
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using System.ComponentModel;
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using System.Collections;
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using AIStudio.Wpf.BaseDiagram.Helpers;
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using Util.DiagramDesigner;
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namespace AIStudio.Wpf.BaseDiagram.Controls
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{
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/// <summary>
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/// Interaction logic for MultiSelectComboBox.xaml
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/// </summary>
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public partial class MultiSelectComboBox : UserControl
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{
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private ObservableCollection<Node> _nodeList;
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public MultiSelectComboBox()
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{
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InitializeComponent();
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_nodeList = new ObservableCollection<Node>();
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}
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#region Dependency Properties
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public static readonly DependencyProperty ItemsSourceProperty =
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DependencyProperty.Register("ItemsSource", typeof(IList), typeof(MultiSelectComboBox), new FrameworkPropertyMetadata(null,
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new PropertyChangedCallback(MultiSelectComboBox.OnItemsSourceChanged)));
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public static readonly DependencyProperty SelectedItemsProperty =
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DependencyProperty.Register("SelectedItems", typeof(IList), typeof(MultiSelectComboBox), new FrameworkPropertyMetadata(null,
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new PropertyChangedCallback(MultiSelectComboBox.OnSelectedItemsChanged)));
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public static readonly DependencyProperty SelectedValuesProperty =
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DependencyProperty.Register("SelectedValues", typeof(IList), typeof(MultiSelectComboBox), new FrameworkPropertyMetadata(null,
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new PropertyChangedCallback(MultiSelectComboBox.OnSelectedValuesChanged)));
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public static readonly DependencyProperty TextProperty =
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DependencyProperty.Register("Text", typeof(string), typeof(MultiSelectComboBox), new UIPropertyMetadata(string.Empty));
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public static readonly DependencyProperty DefaultTextProperty =
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DependencyProperty.Register("DefaultText", typeof(string), typeof(MultiSelectComboBox), new UIPropertyMetadata(string.Empty));
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public string DisplayMemberPath { get; set; }
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public string SelectedValuePath { get; set; }
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public IList ItemsSource
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{
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get { return (IList)GetValue(ItemsSourceProperty); }
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set
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{
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SetValue(ItemsSourceProperty, value);
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}
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}
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public IList SelectedItems
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{
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get { return (IList)GetValue(SelectedItemsProperty); }
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set
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{
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SetValue(SelectedItemsProperty, value);
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}
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}
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public IList SelectedValues
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{
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get { return (IList)GetValue(SelectedValuesProperty); }
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set
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{
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SetValue(SelectedValuesProperty, value);
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}
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}
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public string Text
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{
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get { return (string)GetValue(TextProperty); }
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set { SetValue(TextProperty, value); }
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}
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public string DefaultText
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{
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get { return (string)GetValue(DefaultTextProperty); }
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set { SetValue(DefaultTextProperty, value); }
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}
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#endregion
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#region Events
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private static void OnItemsSourceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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MultiSelectComboBox control = (MultiSelectComboBox)d;
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control.DisplayInControl();
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}
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private static void OnSelectedItemsChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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MultiSelectComboBox control = (MultiSelectComboBox)d;
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control.SelectNodes();
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control.SetText();
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}
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private static void OnSelectedValuesChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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MultiSelectComboBox control = (MultiSelectComboBox)d;
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control.SelectNodes();
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control.SetText();
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}
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private void CheckBox_Click(object sender, RoutedEventArgs e)
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{
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CheckBox clickedBox = (CheckBox)sender;
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if (clickedBox.Content.ToString() == "All")
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{
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if (clickedBox.IsChecked.Value)
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{
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foreach (Node node in _nodeList)
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{
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node.IsSelected = true;
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}
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}
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else
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{
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foreach (Node node in _nodeList)
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{
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node.IsSelected = false;
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}
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}
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}
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else
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{
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int _selectedCount = 0;
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foreach (Node s in _nodeList)
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{
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if (s.IsSelected && s.Object.ToString() != "All")
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_selectedCount++;
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}
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if (_selectedCount == _nodeList.Count - 1)
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_nodeList.FirstOrDefault(i => i.Object.ToString() == "All").IsSelected = true;
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else
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_nodeList.FirstOrDefault(i => i.Object.ToString() == "All").IsSelected = false;
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}
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SetSelectedItems();
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SetText();
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}
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#endregion
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#region Methods
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private void SelectNodes()
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{
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if (SelectedItems != null)
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{
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foreach (var item in SelectedItems)
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{
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Node node = _nodeList.FirstOrDefault(i => i.Object == item);
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if (node != null)
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node.IsSelected = true;
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}
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}
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else if (SelectedValues != null)
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{
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foreach (var item in SelectedValues)
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{
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Node node = _nodeList.FirstOrDefault(i => i.Object != null && i.Object.ToString() != "All" && i.Object.GetPropertyValue(SelectedValuePath) == item);
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if (node != null)
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node.IsSelected = true;
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}
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}
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}
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private void SetSelectedItems()
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{
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if (SelectedItems != null)
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{
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SelectedItems.Clear();
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foreach (Node node in _nodeList)
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{
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if (node.IsSelected && node.Object.ToString() != "All")
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{
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if (this.ItemsSource.Count > 0)
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{
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if (SelectedItems != null)
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{
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SelectedItems.Add(node.Object);
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}
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}
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}
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}
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}
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if (SelectedValues != null)
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{
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SelectedValues.Clear();
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foreach (Node node in _nodeList)
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{
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if (node.IsSelected && node.Object.ToString() != "All")
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{
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if (this.ItemsSource.Count > 0)
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{
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if (SelectedValues != null)
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{
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SelectedValues.Add(node.Object.GetPropertyValue(SelectedValuePath));
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}
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}
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}
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}
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}
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}
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private void DisplayInControl()
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{
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_nodeList.Clear();
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if (this.ItemsSource.Count > 0)
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_nodeList.Add(new Node("All", DisplayMemberPath));
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foreach (var item in this.ItemsSource)
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{
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Node node = new Node(item, DisplayMemberPath);
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_nodeList.Add(node);
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}
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MultiSelectCombo.ItemsSource = _nodeList;
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}
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private void SetText()
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{
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StringBuilder displayText = new StringBuilder();
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foreach (Node s in _nodeList)
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{
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if (s.IsSelected == true && s.Object.ToString() == "All")
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{
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displayText = new StringBuilder();
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displayText.Append("All");
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break;
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}
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else if (s.IsSelected == true && s.Object.ToString() != "All")
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{
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displayText.Append(s.Object);
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displayText.Append(',');
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}
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}
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this.Text = displayText.ToString().TrimEnd(new char[] { ',' });
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// set DefaultText if nothing else selected
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if (string.IsNullOrEmpty(this.Text))
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{
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this.Text = this.DefaultText;
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}
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}
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#endregion
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}
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public class Node : INotifyPropertyChanged
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{
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#region ctor
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public Node(object obj, string displayMemberPath)
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{
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Object = obj;
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if (!string.IsNullOrEmpty(displayMemberPath) && Object.ContainsProperty(displayMemberPath))
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Title = Object.GetPropertyValue(displayMemberPath).ToString();
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else
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Title = obj.ToString();
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}
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#endregion
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#region Properties
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private object _object;
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public object Object
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{
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get
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{
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return _object;
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}
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set
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{
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_object = value;
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NotifyPropertyChanged("Object");
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}
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}
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private string _title;
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public string Title
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{
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get
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{
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return _title;
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}
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set
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{
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_title = value;
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NotifyPropertyChanged("Title");
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}
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}
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private bool _isSelected;
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public bool IsSelected
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{
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get
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{
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return _isSelected;
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}
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set
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{
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_isSelected = value;
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NotifyPropertyChanged("IsSelected");
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}
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}
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#endregion
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public event PropertyChangedEventHandler PropertyChanged;
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protected void NotifyPropertyChanged(string propertyName)
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{
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if (PropertyChanged != null)
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{
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PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
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}
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}
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}
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}
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