Display_D_HP/TeamAAS-VM/Controls/ParameterEdit.xaml.cs

using Prism.Commands;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using TeamAAS_VP.Models;
using TeamAAS_VP.Models.Product;

namespace TeamAAS_VP.Controls
{
    /// <summary>
    /// ParameterEdit.xaml 的交互逻辑
    /// </summary>
    public partial class ParameterEdit : UserControl, INotifyPropertyChanged
    {
        public ParameterEdit()
        {
            InitializeComponent();
        }

        private ProductGlobalParam _SelectParam;

        public ProductGlobalParam SelectParam
        {
            get { return _SelectParam; }
            set { SetProperty(ref _SelectParam, value); }
        }


        /// <summary>
        /// 产品全局参数集合 依赖属性（支持外部 Binding）
        /// </summary>
        public static readonly DependencyProperty GlobalParamListCollectionProperty =
            DependencyProperty.Register(
                nameof(GlobalParamListCollection),
                typeof(ObservableCollection<ProductGlobalParam>),
                typeof(ParameterEdit),
                new PropertyMetadata(null));

        /// <summary>
        /// 公开可绑定属性
        /// </summary>
        public ObservableCollection<ProductGlobalParam> GlobalParamListCollection
        {
            get => (ObservableCollection<ProductGlobalParam>)GetValue(GlobalParamListCollectionProperty);
            set => SetValue(GlobalParamListCollectionProperty, value);
        }

        private DelegateCommand _AddCommand;
        public DelegateCommand AddCommand =>
            _AddCommand ?? (_AddCommand = new DelegateCommand(ExecuteAddCommand));

        private DelegateCommand<ProductGlobalParam> _RemoveCommand;
        public DelegateCommand<ProductGlobalParam> RemoveCommand =>
            _RemoveCommand ?? (_RemoveCommand = new DelegateCommand<ProductGlobalParam>(ExecuteRemoveCommand));

        void ExecuteRemoveCommand(ProductGlobalParam param)
        {
            if (param == null || GlobalParamListCollection == null) return;

            GlobalParamListCollection.Remove(param);
            for (int i = 0; i < GlobalParamListCollection.Count; i++)
            {
                GlobalParamListCollection[i].Number = i;
            }
        }

        void ExecuteAddCommand()
        {
            if (GlobalParamListCollection == null)
            {
                GlobalParamListCollection = new ObservableCollection<ProductGlobalParam>();
            }

            GlobalParamListCollection.Add(new ProductGlobalParam() { Number= GlobalParamListCollection.Count});
        }
        #region 属性通知
        /// <summary>
        /// Occurs when a property value changes.
        /// </summary>
        public event PropertyChangedEventHandler PropertyChanged;

        /// <summary>
        /// Checks if a property already matches a desired value. Sets the property and
        /// notifies listeners only when necessary.
        /// </summary>
        /// <typeparam name="T">Type of the property.</typeparam>
        /// <param name="storage">Reference to a property with both getter and setter.</param>
        /// <param name="value">Desired value for the property.</param>
        /// <param name="propertyName">Name of the property used to notify listeners. This
        /// value is optional and can be provided automatically when invoked from compilers that
        /// support CallerMemberName.</param>
        /// <returns>True if the value was changed, false if the existing value matched the
        /// desired value.</returns>
        protected virtual bool SetProperty<T>(ref T storage, T value, [CallerMemberName] string propertyName = null)
        {
            if (EqualityComparer<T>.Default.Equals(storage, value)) return false;

            storage = value;
            RaisePropertyChanged(propertyName);

            return true;
        }

        /// <summary>
        /// Checks if a property already matches a desired value. Sets the property and
        /// notifies listeners only when necessary.
        /// </summary>
        /// <typeparam name="T">Type of the property.</typeparam>
        /// <param name="storage">Reference to a property with both getter and setter.</param>
        /// <param name="value">Desired value for the property.</param>
        /// <param name="propertyName">Name of the property used to notify listeners. This
        /// value is optional and can be provided automatically when invoked from compilers that
        /// support CallerMemberName.</param>
        /// <param name="onChanged">Action that is called after the property value has been changed.</param>
        /// <returns>True if the value was changed, false if the existing value matched the
        /// desired value.</returns>
        protected virtual bool SetProperty<T>(ref T storage, T value, Action onChanged, [CallerMemberName] string propertyName = null)
        {
            if (EqualityComparer<T>.Default.Equals(storage, value)) return false;

            storage = value;
            onChanged?.Invoke();
            RaisePropertyChanged(propertyName);

            return true;
        }

        /// <summary>
        /// Raises this object's PropertyChanged event.
        /// </summary>
        /// <param name="propertyName">Name of the property used to notify listeners. This
        /// value is optional and can be provided automatically when invoked from compilers
        /// that support <see cref="CallerMemberNameAttribute"/>.</param>
        protected void RaisePropertyChanged([CallerMemberName] string propertyName = null)
        {
            OnPropertyChanged(new PropertyChangedEventArgs(propertyName));
        }

        /// <summary>
        /// Raises this object's PropertyChanged event.
        /// </summary>
        /// <param name="args">The PropertyChangedEventArgs</param>
        protected virtual void OnPropertyChanged(PropertyChangedEventArgs args)
        {
            PropertyChanged?.Invoke(this, args);
        }
        #endregion
    }
}