PDFOffice_Windows_exe/PDF Office/CustomControl/CompositeControl/SlidComboControl.xaml.cs

using Prism.Commands;
using System;
using System.Collections.Generic;
using System.Linq;
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;

namespace PDF_Office.CustomControl.CompositeControl
{

    /// <summary>
    /// SlidComboControl.xaml 的交互逻辑
    /// </summary>
    public partial class SlidComboControl : UserControl
    {
        public List<ComboDataItem> Items { get;private set; }    
        public event RoutedEventHandler ValueChanged;
        
        public SlidComboControl()
        {
            InitializeComponent();
           
            Items = new List<ComboDataItem>();
            DefaultItems();
        }

        public void SetItemSource(List<ComboDataItem> items)
        {
            Items = items;
            combox.ItemSource = Items;
            UpdateMaxMinValue(items);
        }

        private void UpdateMaxMinValue(List<ComboDataItem> items)
        {
            double MaxValue = 0;
            double MinValue = 0;
            if (items != null)
            {
                foreach (var item in items)
                {
                    if (item.Value >= MaxValue)
                        MaxValue = item.Value;

                }
                MinValue = MaxValue;
                foreach (var item in items)
                {
                    if (item.Value <= MinValue)
                        MinValue = item.Value;

                }

                ThicknessSlider.Maximum = MaxValue;
                ThicknessSlider.Minimum = MinValue;
            }
        }

        private void DefaultItems()
        {
            var item = new ComboDataItem(3);
            Items.Add(item);
            item = new ComboDataItem(6);
            Items.Add(item);
            item = new ComboDataItem(9);
            Items.Add(item);
            item = new ComboDataItem(12);
            Items.Add(item);
            item = new ComboDataItem(15);
            Items.Add(item);
            item = new ComboDataItem(18);
            Items.Add(item);
            item = new ComboDataItem(21);
            Items.Add(item);
            item = new ComboDataItem(24);
            Items.Add(item);

            combox.ItemSource = Items;
            UpdateMaxMinValue(Items);
        }

        private void UserControl_Loaded(object sender, RoutedEventArgs e)
        {
            ThicknessSlider.ValueChanged += ThicknessSlider_ValueChanged;
            combox.ValueChanged -= combox_ValueChanged;
            combox.ValueChanged += combox_ValueChanged;
        }

        private void combox_ValueChanged(object sender, RoutedEventArgs e)
        {
            if (sender is double == true)
            {
                if ((double)sender != Value)
                    Value = (double)sender;
            }
        }

        private void ThicknessSlider_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
        {
            combox.SelectedItems = new ComboDataItem(Value);
            ValueChanged?.Invoke(Value, null);
        }


        public double Value
        {
            get { return (double)GetValue(ValueProperty); }
            set { SetValue(ValueProperty, value); }
        }
        public static readonly DependencyProperty ValueProperty =
           DependencyProperty.Register("Value", typeof(double), typeof(SlidComboControl), new PropertyMetadata(1.0, SelectedValuePropertyChanged));
       
        private static void SelectedValuePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            var control = d as SlidComboControl;
            var value = (double)e.NewValue;
            if (control != null)
            {
                control.combox.SelectedItems = new ComboDataItem(value);

            }
        }

    }
}