Painter/LayerCanvas.xaml.cs

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using Component;
using Painter.Component;
using Painter.Model;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.IO;
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.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

namespace Painter
{
    /// <summary>
    /// LayerCanvas.xaml 的交互逻辑
    /// </summary>
    public partial class LayerCanvas : UserControl, INotifyPropertyChanged
    {
        
        public int mActiveLayer { get; set; }
        public List<LayerState> mOrderBackup = new List<LayerState>();
        public event PropertyChangedEventHandler PropertyChanged;

        //public Cursor mLastCursor { get; set; }
        public string FullFileName { get; set; }
        public List<PaintCanvas> CanvasCollection
        {
            get
            {
                return gridLayout.Children.Cast<UIElement>().
                    Where(o => o is PaintCanvas).Cast<PaintCanvas>().Reverse().ToList();
            }
        }
        public PaintCanvas ActiveCanvas
        {
            get
            {
                LayerState item = mOrderBackup.ElementAt(mActiveLayer);
                PaintCanvas active = gridLayout.Children[item.layer_index] as PaintCanvas;
                return active;
            }
        }
        public string[] Layers
        {
            get
            {
                return mOrderBackup.Select(o => o.layer_name).ToArray();
            }
        }
        public CommandStack mCmdStack { get; set; }