009_DI-Elec/newFront/c#前端/DI-Electrical/Style/StyleSelectors/ConditionalStyleSelector.cs

using System.Collections.Generic;
using System.Windows.Controls;
using System.Windows.Data;

namespace DI_Electrical.Style
{
    internal class ConditionalStyleSelector:StyleSelector
    {
        public override System.Windows.Style SelectStyle(object item, System.Windows.DependencyObject container)
        {
            //获取到转换器返回的值
            object conditionValue = this.ConditionConverter.Convert(item, null, null, null);
            foreach (ConditionalStyleRule rule in this.Rules)
            {
                //值相同则返回当前样式
                if (Equals(rule.Value, conditionValue))
                {
                    return rule.Style;
                }
            }

            return base.SelectStyle(item, container);
        }

        List<ConditionalStyleRule> _Rules;
        public List<ConditionalStyleRule> Rules
        {
            get
            {
                if (this._Rules == null)
                {
                    this._Rules = new List<ConditionalStyleRule>();
                }

                return this._Rules;
            }
        }

        IValueConverter _ConditionConverter;
        public IValueConverter ConditionConverter
        {
            get
            {
                return this._ConditionConverter;
            }
            set
            {
                this._ConditionConverter = value;
            }
        }
    }

    public class ConditionalStyleRule
    {
        object _Value;
        public object Value
        {
            get
            {
                return this._Value;
            }
            set
            {
                this._Value = value;
            }
        }

        System.Windows.Style _Style;
        public System.Windows.Style Style
        {
            get
            {
                return this._Style;
            }
            set
            {
                this._Style = value;
            }
        }
    }

}