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

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 event EventHandler<double> ValueChanged;
        public SlidComboControl()
        {
            InitializeComponent();
        }

        private void UserControl_Loaded(object sender, RoutedEventArgs e)
        {
            ThicknessBox.SelectionChanged -= ThicknessBox_SelectionChanged;
            ThicknessBox.SelectionChanged += ThicknessBox_SelectionChanged;
            ThicknessSlider.ValueChanged += ThicknessSlider_ValueChanged;
            ThicknessBox.SelectedIndex = 0;
        }

        private void ThicknessSlider_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
        {
            foreach(var item in ThicknessBox.Items)
            {
                var itemData = item as ComboBoxItem;
                if(itemData != null)
                {
                   var doubleItem = double.Parse(itemData.Content.ToString());
                    if(doubleItem == Value)
                    {
                        ThicknessBox.SelectedItem = itemData;
                        break;
                    }
                }
            }
            ThicknessText.Text = Value.ToString();
        }

        private void ThicknessBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            var listItem = ThicknessBox.ItemContainerGenerator.ContainerFromItem(ThicknessBox.SelectedItem) as ComboBoxItem;
            if (listItem != null)
            {
                Value = double.Parse(listItem.Content.ToString());
                ThicknessText.Text = listItem.Content.ToString();
            }
            else
            {
                ThicknessText.Text = "1";
                Value = 1.0;
            }
                

            

        }

        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.ValueChanged?.Invoke(control, value);
            }
        }
    }
}