using System;
using CPF.ReoGrid.Rendering;

namespace CPF.ReoGrid.Drawing
{
	internal class WorksheetDrawingCanvas : DrawingCanvas
	{
		internal Worksheet Worksheet { get; set; }

		public WorksheetDrawingCanvas(Worksheet sheet)
		{
			this.Worksheet = sheet;
		}

		public override void Invalidate()
		{
			bool flag = this.Worksheet != null;
			if (flag)
			{
				this.Worksheet.RequestInvalidate();
			}
		}

		protected override void OnPaint(RDrawingContext dc)
		{
			dc.Graphics.IsAntialias = true;
			base.DrawChildren(dc);
			dc.Graphics.IsAntialias = false;
		}

		public override IDrawingObjectCollection Children
		{
			get
			{
				bool flag = this.worksheetDrawingObjectCollection == null;
				if (flag)
				{
					this.worksheetDrawingObjectCollection = new WorksheetDrawingObjectCollection(this);
				}
				return this.worksheetDrawingObjectCollection;
			}
		}

		internal void Clear()
		{
			this.Children.Clear();
		}

		internal WorksheetDrawingObjectCollection worksheetDrawingObjectCollection;
	}
}