picbox.cs

来自「C#纸牌游戏,做的还是比较精致的.值得学习.」· CS 代码 · 共 53 行

using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.Windows.Forms;
namespace CardGame
{
	/// <summary>
	/// PicBox 的摘要说明。
	/// </summary>
	public class PicBox:UserControl
	{
		private Image image=null;
		public PicBox():base()
		{
			SetStyle(ControlStyles.UserPaint, true);
			SetStyle(ControlStyles.AllPaintingInWmPaint, true); // 禁止擦除背景.
			SetStyle(ControlStyles.DoubleBuffer, true); // 双缓冲

			SetStyle(ControlStyles.Opaque, false);
			SetStyle(ControlStyles.Selectable, false);
			SetStyle(ControlStyles.SupportsTransparentBackColor, true);

		}

		public Image Image
		{
			get
			{
				return image;
			}
			set
			{
				if(image==value)return;
				image=value;
				base.Invalidate(false);
			}
		}
		
		protected override void OnPaint(PaintEventArgs e)
		{
			Graphics g=e.Graphics;
			if(image!=null)
			{
				if(!image.Size.Equals(base.Size))
				{
					base.Size=image.Size;
				}
				g.DrawImageUnscaled(image,0,0);
			}
		}
	}
}