using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.Runtime;
using System;
using System.Text;
public class AttributeHoverMonitor
{
private static Editor _ed;
private static object _lastHoveredId = null;
[CommandMethod("StartHoverMonitor")]
public static void StartHoverMonitor()
{
_ed = Application.DocumentManager.MdiActiveDocument.Editor;
_ed.PointMonitor += OnPointMonitor;
_ed.WriteMessage("\n属性悬停监视已启用");
}
[CommandMethod("StopHoverMonitor")]
public static void StopHoverMonitor()
{
_ed.PointMonitor -= OnPointMonitor;
_ed.WriteMessage("\n属性悬停监视已禁用");
}
private static void OnPointMonitor(object sender, PointMonitorEventArgs e)
{
try
{
using (var tr = _ed.Document.TransactionManager.StartOpenCloseTransaction())
{
var objId = e.Context.GetPickedEntities()?.FirstOrDefault().ObjectId;
if (objId == null || !objId.IsValid) return;
// 性能优化：仅当悬停新对象时处理
if (_lastHoveredId != null && _lastHoveredId.Equals(objId)) return;
_lastHoveredId = objId;
var entity = tr.GetObject(objId, OpenMode.ForRead) as Entity;
if (entity is BlockReference br)
{
var tooltip = GetAttributeTooltip(br, tr);
if (!string.IsNullOrEmpty(tooltip))
{
// 显示自定义工具提示
e.Context.SetToolTip(tooltip, new Point2d(e.Context.RawPoint.X + 10, e.Context.RawPoint.Y));
}
}
tr.Commit();
}
}
catch { /* 错误处理 */ }
}
private static string GetAttributeTooltip(BlockReference br, Transaction tr)
{
var sb = new StringBuilder();
sb.AppendLine($"块名称：{br.GetBlockName(tr)}");
sb.AppendLine($"位置：{br.Position.ToString()}");
foreach (ObjectId attId in br.AttributeCollection)
{
if (!attId.IsValid) continue;
var attRef = tr.GetObject(attId, OpenMode.ForRead) as AttributeReference;
sb.AppendLine($"{attRef?.Tag}：{attRef?.TextString}");
}
return sb.ToString();
}
}
// BlockReference扩展方法
public static class BlockExtensions
{
public static string GetBlockName(this BlockReference br, Transaction tr)
{
return ((BlockTableRecord)tr.GetObject(br.BlockTableRecord, OpenMode.ForRead)).Name;
}
}
// 在原有代码基础上添加以下功能
private static void OnPointMonitor(object sender, PointMonitorEventArgs e)
{
// ...原有代码...
// 添加高亮显示
if (entity is BlockReference)
{
e.Context.HighlightEntities(new ObjectId[] { objId });
}
// 添加动态预览窗口
var previewPos = new Point3d(e.Context.RawPoint.X + 20, e.Context.RawPoint.Y - 50, 0);
e.Context.DrawText(previewPos, tooltip, 12, TextAlignment.Left);
}