cad.net 图层解锁时图层褪色度设置LayLockFadectl
说明
cad交互操作的时候,想跟cad的锁定和解锁一样拥有褪色度,那么你需要阅读此篇
代码
#if !HC2020
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.Runtime;
using Acap = Autodesk.AutoCAD.ApplicationServices.Application;
#else
using GrxCAD.DatabaseServices;
using GrxCAD.EditorInput;
using GrxCAD.Runtime;
using Acap = GrxCAD.ApplicationServices.Application;
#endif
using System;
namespace JoinBox
{
public class 选择图元设置图层褪色度
{
[CommandMethod("JJCmd_lock1")]
public void JJCmd_lock1()
{
var dm = Acap.DocumentManager;
var doc = dm.MdiActiveDocument;
var db = doc.Database;
var ed = doc.Editor;
var pr = ed.GetEntity("\n请选择图元:锁定");
if (pr.Status != PromptStatus.OK)
return;
db.Action(tr => {
var getEnt = pr.ObjectId.ToEntity(tr);
getEnt.LayerLock(true, tr);
});
}
[CommandMethod("JJCmd_lock2")]
public void JJCmd_lock2()
{
var dm = Acap.DocumentManager;
var doc = dm.MdiActiveDocument;
var db = doc.Database;
var ed = doc.Editor;
var peo1 = new PromptEntityOptions("\n请选择图元:解锁")
{
AllowObjectOnLockedLayer = true,
AllowNone = true
};
var pr = ed.GetEntity(peo1);
if (pr.Status != PromptStatus.OK)
return;
db.Action(tr => {
var getEnt = pr.ObjectId.ToEntity(tr);
getEnt.LayerLock(false, tr);
});
}
}
}
namespace JoinBox
{
public static partial class LayerHelper
{
/// <summary>
/// 按图元锁定或解锁图层
/// </summary>
/// <param name="ent">图元实体</param>
/// <param name="locked"><see langword="true"/>锁定,<see langword="false"/>解锁</param>
/// <returns>原本状态</returns>
public static bool LayerLock(this Entity ent, bool locked, Transaction tr)
{
return LayerLock(locked, ent.LayerId, tr, ent.Database);
}
/// <summary>
/// 按层名锁定或解锁图层
/// </summary>
/// <param name="locked"><see langword="true"/>锁定,<see langword="false"/>解锁</param>
/// <param name="layerId">图层</param>
/// <param name="tr">事务</param>
/// <param name="db">数据库</param>
/// <returns>图层原本锁定的状态</returns>
public static bool LayerLock(bool locked, ObjectId layerId, Transaction tr, Database db)
{
if (locked)
{
//锁定图层:
//先遍历这个图层的图元,把它放入刷新队列,因为图层锁了的话图元就无法更改了
SetLayLockFadectl(true, layerId, tr, db);
}
bool oldSetting = false;
var ltr = tr.GetObject(layerId, OpenMode.ForRead) as LayerTableRecord;
if (ltr != null)
{
ltr.UpgradeOpen();
oldSetting = ltr.IsLocked;//原本的状态
ltr.IsLocked = locked;
ltr.IsOff = ltr.IsOff; //必须设置一下才能更新显示
ltr.DowngradeOpen();
ltr.Dispose();
}
if (!locked)
{
//解锁图层:
//上面先解锁,再处理褪色度显示,因为图层锁了的话图元就无法更改了
SetLayLockFadectl(false, layerId, tr, db);
}
return oldSetting;
}
/// <summary>
/// 设置图层褪色度显示
/// </summary>
/// <param name="locked"><see langword="true"/>锁定,<see langword="false"/>解锁</param>
/// <param name="layerId">图层</param>
/// <param name="tr">事务</param>
/// <param name="db">数据库</param>
static void SetLayLockFadectl(bool locked, ObjectId layerId, Transaction tr, Database db)
{
const string str = "LayLockFadectl";
var value = int.Parse(CadSystem.Getvar(str));
value = Math.Abs(value);//锁定-绝对值褪色...设置了会自动刷新屏幕显示
if (!locked)
value *= -1;//解锁-负数...设置完之后要手动刷新
CadSystem.Setvar(str, value.ToString());
//方案一:获取屏幕内的图元...成功是成功,但是不在屏幕内的褪色度没有变化
//var ids = ed.SelectViewportObjectId();
//if (ids == null)
// return;
//ids.ToEntity(tr, entItem => {
// entItem.EntityRedraw(BrightEntity.RecordGraphicsModified);
//});
//方案二:这个刷新不成功...博客搜:动画
//ed.UpdateScreenEx();
//方案三:遍历全图,过滤指定图层图元...
//这个TraverseEntitys函数在:
//https://www.cnblogs.com/JJBox/p/12196287.html
//BrightEntity.RecordGraphicsModified在:
//https://gitee.com/inspirefunction/ifoxcad/blob/v0.7/src/CAD/IFox.CAD.Shared/ExtensionMethod/RedrawEx.cs
db.TraverseEntitys(tr, entItem => {
if (entItem.LayerId == layerId)
entItem.EntityRedraw(BrightEntity.RecordGraphicsModified);
return false;
});
//解锁图层之后,有其他图层是锁定的,那么此时需要还原褪色度
if (!locked)
CadSystem.Setvar(str, (value * -1).ToString());
}
}
}
public static class EditorHelper
{
/// <summary>
/// 获取当前屏幕的所有图元
/// </summary>
/// <param name="ed"></param>
/// <param name="tr"></param>
/// <returns></returns>
public static ObjectId[] SelectViewportObjectId(this Editor ed)
{
var view = ed.GetCurrentView();
var cpt = view.CenterPoint;
var w = view.Width / 2;
var h = view.Height / 2;
var min = new Point3d(cpt.X - w, cpt.Y - h, 0);
var max = new Point3d(cpt.X + w, cpt.Y + h, 0);
var ssget = ed.SelectCrossingWindow(min, max);
if (ssget.Status != PromptStatus.OK)
return null;
return ssget.Value.GetObjectIds();
}
}
特别说明
0x01
解锁是必须遍历全图的,若只遍历当前屏幕的图元,会呈现这样的效果,屏幕外没有退出淡显:
0x02
e大告诉我这个神奇的地方,估计是触发了某些桌子内部机制,就好像WPF的数据绑定触发?
可以尝试注释掉这句再运行,会发现锁定褪色都不成功.acad08测试.
ltr.IsOff = ltr.IsOff;
相关说明
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