Painter/Component/PaintCanvas.cs

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using Component;
using Painter.Model;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Imaging;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Automation.Peers;
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.Resources;
using System.Windows.Shapes;

namespace Painter.Component
{
    public class PaintCanvas : InkCanvas
    {
        public Adorners mAdorner;
        BitmapCanvas mBitmapCanvas = new BitmapCanvas();
        public PaintCanvas()
        {
            Children.Add(mBitmapCanvas);

            UseCustomCursor = true;
            VerticalAlignment = VerticalAlignment.Top;
            HorizontalAlignment = HorizontalAlignment.Left;
            Background = System.Windows.Media.Brushes.Transparent;
            DefaultDrawingAttributes.StylusTip = StylusTip.Ellipse;
            VisualBitmapScalingMode = BitmapScalingMode.NearestNeighbor;
            RenderOptions.SetBitmapScalingMode(this, BitmapScalingMode.NearestNeighbor);
        }
        public void DrawPicture(DrawingVisual image)
        {
            mBitmapCanvas.Add(image);
        }
        public void DrawFloatPicture(DrawingVisual drawing)
        {
            OnEditingModeChanged(null);
            AAdorner adorner = AdornerControl.CreateAdorner(this, Adorners.Rect);
            adorner.EndUpdate(drawing);

            List<FrameworkElement> collection = (Parent as Grid)?.Children.Cast<FrameworkElement>().ToList();
            if (drawing.DescendantBounds.Width > Width)
            {
                (Parent as Grid).Width = drawing.DescendantBounds.Width;
                collection?.ForEach(o => o.Width = drawing.DescendantBounds.Width);
            }
            if (drawing.DescendantBounds.Height > Height)
            {
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