using System;
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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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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namespace XHandler.Controls
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{
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/// <summary>
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/// 按照步骤 1a 或 1b 操作，然后执行步骤 2 以在 XAML 文件中使用此自定义控件。
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///
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/// 步骤 1a) 在当前项目中存在的 XAML 文件中使用该自定义控件。
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/// 将此 XmlNamespace 特性添加到要使用该特性的标记文件的根
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/// 元素中:
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///
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/// xmlns:MyNamespace="clr-namespace:XHandler.Controls"
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///
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///
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/// 步骤 1b) 在其他项目中存在的 XAML 文件中使用该自定义控件。
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/// 将此 XmlNamespace 特性添加到要使用该特性的标记文件的根
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/// 元素中:
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///
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/// xmlns:MyNamespace="clr-namespace:XHandler.Controls;assembly=XHandler.Controls"
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///
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/// 您还需要添加一个从 XAML 文件所在的项目到此项目的项目引用，
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/// 并重新生成以避免编译错误:
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///
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/// 在解决方案资源管理器中右击目标项目，然后依次单击
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/// “添加引用”->“项目”->[浏览查找并选择此项目]
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///
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///
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/// 步骤 2)
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/// 继续操作并在 XAML 文件中使用控件。
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///
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/// <MyNamespace:MultiComboBox/>
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///
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/// </summary>
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public class MultiComboBox : ComboBox
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{
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static MultiComboBox()
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{
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DefaultStyleKeyProperty.OverrideMetadata(typeof(MultiComboBox), new FrameworkPropertyMetadata(typeof(MultiComboBox)));
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}
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private static void OnPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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d.SetValue(e.Property, e.NewValue);
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}
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private ObservableCollection<MultiCbxBaseData> _ChekedItems = new ObservableCollection<MultiCbxBaseData>();
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/// <summary>
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/// 选中项列表
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/// </summary>
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public ObservableCollection<MultiCbxBaseData> ChekedItems
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{
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get { return _ChekedItems; }
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set { SetValue(ChekedItemsProperty, value); }
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}
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public static readonly DependencyProperty ChekedItemsProperty =
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DependencyProperty.Register("ChekedItems", typeof(ObservableCollection<MultiCbxBaseData>), typeof(MultiComboBox), new PropertyMetadata(new ObservableCollection<MultiCbxBaseData>(), OnPropertyChanged));
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/// <summary>
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/// ListBox竖向列表
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/// </summary>
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private ListBox _ListBoxV;
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/// <summary>
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/// ListBox横向列表
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/// </summary>
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private ListBox _ListBoxH;
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public override void OnApplyTemplate()
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{
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base.OnApplyTemplate();
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_ListBoxV = Template.FindName("PART_ListBox", this) as ListBox;
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_ListBoxH = Template.FindName("PART_ListBoxChk", this) as ListBox;
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if (_ListBoxV != null && _ListBoxH != null)
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{
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_ListBoxH.ItemsSource = ChekedItems;
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_ListBoxV.SelectionChanged += _ListBoxV_SelectionChanged;
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_ListBoxH.SelectionChanged += _ListBoxH_SelectionChanged;
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if (ItemsSource != null)
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{
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foreach (var item in ItemsSource)
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{
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MultiCbxBaseData bdc = item as MultiCbxBaseData;
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if (bdc.IsCheck)
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{
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_ListBoxV.SelectedItems.Add(bdc);
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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 _ListBoxH_SelectionChanged(object sender, SelectionChangedEventArgs e)
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{
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foreach (var item in e.AddedItems)
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{
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MultiCbxBaseData datachk = item as MultiCbxBaseData;
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}
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foreach (var item in e.RemovedItems)
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{
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MultiCbxBaseData datachk = item as MultiCbxBaseData;
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for (int i = 0; i < _ListBoxV.SelectedItems.Count; i++)
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{
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MultiCbxBaseData datachklist = _ListBoxV.SelectedItems[i] as MultiCbxBaseData;
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if (datachklist.ID == datachk.ID)
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{
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_ListBoxV.SelectedItems.Remove(_ListBoxV.SelectedItems[i]);
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}
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}
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}
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}
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void _ListBoxV_SelectionChanged(object sender, SelectionChangedEventArgs e)
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{
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foreach (var item in e.AddedItems)
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{
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MultiCbxBaseData datachk = item as MultiCbxBaseData;
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datachk.IsCheck = true;
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if (_ChekedItems.IndexOf(datachk) < 0)
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{
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_ChekedItems.Add(datachk);
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}
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}
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foreach (var item in e.RemovedItems)
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{
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MultiCbxBaseData datachk = item as MultiCbxBaseData;
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datachk.IsCheck = false;
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_ChekedItems.Remove(datachk);
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}
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}
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public void SetSelecteItems(ObservableCollection<MultiCbxBaseData> items)
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{
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foreach(var item in items)
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{
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_ListBoxV.SelectedItems.Add(item);
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}
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}
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public void AddSelectedItem(MultiCbxBaseData item)
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{
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_ListBoxV.SelectedItems.Add(item);
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}
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public class MultiCbxBaseData
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{
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private string _id;
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/// <summary>
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/// 关联主键
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/// </summary>
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public string ID
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{
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get { return _id; }
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set { _id = value; }
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}
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private string _viewName;
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/// <summary>
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/// 显示名称
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/// </summary>
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public string ViewName
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{
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get { return _viewName; }
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set
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{
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_viewName = value;
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}
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}
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private bool _isCheck;
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/// <summary>
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/// 是否选中
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/// </summary>
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public bool IsCheck
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{
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get { return _isCheck; }
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set { _isCheck = value; }
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}
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}
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}
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}
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