67 lines
1.8 KiB
C#
67 lines
1.8 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Drawing;
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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.Forms;
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namespace videoGather
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{
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public class DoubleBufferedPanel : Panel
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{
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private Bitmap _backImage;
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// 新增背景图属性
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public Bitmap BackImage
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{
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get => _backImage;
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set
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{
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if (_backImage != null)
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{
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_backImage.Dispose();
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}
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_backImage = value;
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Invalidate(); // 触发重绘
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}
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}
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// 构造函数
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public DoubleBufferedPanel()
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{
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// 启用双缓冲
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this.DoubleBuffered = true; // 内置支持
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// 设置样式以避免闪烁
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this.SetStyle(ControlStyles.OptimizedDoubleBuffer |
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ControlStyles.AllPaintingInWmPaint |
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ControlStyles.UserPaint, true);
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}
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protected override void OnPaintBackground(PaintEventArgs e)
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{
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// 禁用默认背景绘制（关键！）
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// base.OnPaintBackground(e); // 注释掉这行
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}
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protected override void OnPaint(PaintEventArgs e)
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{
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// 绘制自定义背景图
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if (_backImage != null)
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{
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e.Graphics.DrawImage(_backImage, ClientRectangle);
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}
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base.OnPaint(e); // 保持原有绘制逻辑
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}
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protected override void Dispose(bool disposing)
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{
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if (disposing)
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{
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_backImage?.Dispose();
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}
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base.Dispose(disposing);
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}
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}
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}
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