SVN r1224

SVN-Revision: r1224
2026-06-22 03:11:46 +00:00
parent 033edf9c25
commit 8c8b515664
4 changed files with 187 additions and 11 deletions
@@ -0,0 +1,49 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Diagnostics;
+using System.Drawing;
+using System.Drawing.Drawing2D;
+using System.Linq;
+using System.Text;
+using System.Windows.Forms;
+
+namespace Lskj.Main.Control
+{
+    public partial class BackgroundPanel :Panel
+    {
+        private Image _originalBackgroundImage;
+
+        // 公开属性：设置/获取背景图片
+        public Image BackgroundImageCustom
+        {
+            get => _originalBackgroundImage;
+            set
+            {
+                _originalBackgroundImage = value;
+                Invalidate(); // 设置图片后立即重绘
+            }
+        }
+
+        public BackgroundPanel()
+        {
+            // 关键设置：关闭Panel默认背景，启用双缓冲减少闪烁
+            this.BackgroundImage = null;
+            this.DoubleBuffered = true;
+            this.SetStyle(ControlStyles.UserPaint |
+                           ControlStyles.AllPaintingInWmPaint |
+                           ControlStyles.OptimizedDoubleBuffer, true);
+        }
+
+        // 重写OnPaint方法，手动绘制背景图
+        protected override void OnPaint(PaintEventArgs e)
+        {
+            base.OnPaint(e);
+
+            // 图片为空时直接返回
+            if (_originalBackgroundImage == null) return;
+
+            // 1. 计算等比缩放比例（以Panel的ClientSize为基准）
+            float scaleX = (float)this.ClientSize.Width / _originalBackgroundImage.Width;
+            float scaleY = (float)this.ClientSize.Height / _originalBackgroundImage.Height;
+            float scale = Math.Min(scaleX, sc