using GongSolutions.Wpf.DragDrop;
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using System;
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using System.Collections.Generic;
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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 WPFProject.Models;
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namespace WPFProject.Utils
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{
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public class DdDragHandler : DefaultDragHandler
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{
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public override bool CanStartDrag(IDragInfo dragInfo)
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{
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FuncModel model = dragInfo.SourceItem as FuncModel;
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return model.Children ==null || model.Children.Count == 0;
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}
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}
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}
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