Topic: bugs for a sticker

[nekitip]

*List of bugs we find, and workarounds we try. For forum sticker, if there is a will to do it. Share and help others.

Selection problem
As an end user, use AutoCAD to:
1) Select 20 000-30 000 (same) objects with mouse at once
2) Deselect about half part of previous selection using mouse and holding SHIFT key.
3) Notice that one CPU core is now fully busy and stays busy forever.
4) Press ESC key and now CPU goes to 0% usage.
*observable on 2013, 2015

Hatch object problem
From .NET side, problem of reacting to impliedselectionchanged
1) user opens drawing and creates a hatch object
2) user selects hatch
3) impliedselectionchanged event is fired and your subscribed handler runs
4) if handler immediately starts transaction, opens object, and reads area, assembly is crashed, and later, Autocad itself.
*observable on 2013, 2015
proposed solution 1): on every impliedselectionchanged, addhandler to application.idle, and there remove idle handler, and do the business

(add yours experience, and moderators - please put this in some nice form)

[BlackBox]

...

4) if handler immediately starts transaction, opens object, and reads area, assembly is crashed, and later, Autocad itself.
*observable on 2013, 2015
proposed solution 1): on every impliedselectionchanged, addhandler to application.idle, and there remove idle handler, and do the business

Consider what context you're in when you open the Hatch DbObject... You haven't posted your code, but perhaps you've neglected a preceding DocumentLock?

[Jeff H]

*List of bugs we find, and workarounds we try. For forum sticker, if there is a will to do it. Share and help others.

Selection problem
As an end user, use AutoCAD to:
1) Select 20 000-30 000 (same) objects with mouse at once
2) Deselect about half part of previous selection using mouse and holding SHIFT key.
3) Notice that one CPU core is now fully busy and stays busy forever.
4) Press ESC key and now CPU goes to 0% usage.
*observable on 2013, 2015

Hatch object problem
From .NET side, problem of reacting to impliedselectionchanged
1) user opens drawing and creates a hatch object
2) user selects hatch
3) impliedselectionchanged event is fired and your subscribed handler runs
4) if handler immediately starts transaction, opens object, and reads area, assembly is crashed, and later, Autocad itself.
*observable on 2013, 2015
proposed solution 1): on every impliedselectionchanged, addhandler to application.idle, and there remove idle handler, and do the business

(add yours experience, and moderators - please put this in some nice form)

Use a OpenCloseTransaction in a event handler

[nekitip]

I was thinking about having a place just to post known bug descriptions and solutions, eventually with few lines of code to demonstrate. If we start to debate here, then we have a real possibility to jam this topic and make it unreadable, so it was my fault to post here without acutally get consensus about bug before.
Let moderators of this forum think for a way to arrange this to be clean and easy to read and write some guide rules.

Since Jeff and Blackbox have already asked here, I'm posting here to demonstrate this last bug, will post entire listing so it's easy to copy+paste (and convert to C#). Maybe this was a way to go even first time, so everyone can test it.
Moderators can later rearange this to suite rules.

So to test the last one I've described, use this quick code in a way of:
open new autocad, new file, load app, draw rectancle, draw hatch, delete rectancle, start app with "mytest" command, and set a breakpoint to see that the hatch area is not populated.
Jeff and Blackbox, can you please confirm. And, please, contribute if you have a better solution than me.

Code - vb.net: [Select]

1. Imports System
2. Imports Autodesk.AutoCAD.Runtime
3. Imports Autodesk.AutoCAD.ApplicationServices
4. Imports Autodesk.AutoCAD.DatabaseServices
5. Imports Autodesk.AutoCAD.Geometry
6. Imports Autodesk.AutoCAD.EditorInput
7.  
8. Imports System.ComponentModel
9. Imports System.Collections.Specialized
10. Imports System.Collections.ObjectModel
11. Imports System.Linq
12.  
13. <Assembly: CommandClass(GetType(tmpdel.MyCommands))>
14. <Assembly: ExtensionApplication(GetType(tmpdel.MyPlugin))>
15.  
16.  
17. Namespace tmpdel
18.     Public Class MyPlugin
19.         Implements IExtensionApplication
20.         Public Sub Initialize() Implements IExtensionApplication.Initialize
21.         End Sub
22.         Public Sub Terminate() Implements IExtensionApplication.Terminate
23.         End Sub
24.     End Class
25.  
26.     Public Class MyCommands
27.  
28.         <CommandMethod("mytest")> _
29.         Public Sub MyCommand()
30.             AddHandler Application.DocumentManager.MdiActiveDocument.ImpliedSelectionChanged, (AddressOf sectionch)
31.         End Sub
32.  
33.         Public Sub sectionch(ByVal o As Object, ByVal e As EventArgs)
34.  
35.             Dim db As Database = HostApplicationServices.WorkingDatabase()
36.             Dim doc As Document = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.GetDocument(db)
37.             Using l As DocumentLock = doc.LockDocument()
38.                 Using trans As OpenCloseTransaction = db.TransactionManager.StartOpenCloseTransaction()
39.                     Dim h As Hatch = trans.GetObject(get_selected_oids.First, OpenMode.ForRead)
40.                           'set breakpoint here to see that the hatch area property is not ready
41.                     Dim area As Double = h.Area
42.                     trans.Commit()
43.                 End Using
44.             End Using
45.         End Sub
46.  
47.  
48.         Public Function get_selected_oids() As List(Of ObjectId)
49.             Dim retval As New List(Of ObjectId)
50.             Dim ed As Editor = Application.DocumentManager.MdiActiveDocument.Editor
51.             '' WARNING! THIS WILL SELECT ALL OBJECTS!!!
52.             Dim psr As PromptSelectionResult = ed.SelectAll
53.             If psr.Status = PromptStatus.OK Then
54.                 retval = psr.Value.GetObjectIds.ToList()
55.             End If
56.             Return retval
57.         End Function
58.   End Class
59. End Namespace
60.  

[nekitip]

Twisted Hatch problem
End user can produce hatch that has normal parameters, and then in next step, stretch it in a way that it will produce eInvalidInput error on parameter read.
1) create two rectangles like on picture, and hatch first
2) delete first rectangle
3) move left upper corner like on the picture.
4) notice how object property toolbox is not telling anything is wrong, and in fact it will even show wrong area.
5) if add-in tries to read area, it will crash
*observable on 2015 (and possibly on any autocad where hatch has its own boundaries)
proposed solution: on reading objects parameters, always assume that autocad will bring something undocumented and use try catch.

[BlackBox]

... on reading objects parameters, always assume that autocad will bring something undocumented and use try catch.

... You don't?



 

[Jeff H]

I was thinking about having a place just to post known bug descriptions and solutions, eventually with few lines of code to demonstrate. If we start to debate here, then we have a real possibility to jam this topic and make it unreadable, so it was my fault to post here without acutally get consensus about bug before.
Let moderators of this forum think for a way to arrange this to be clean and easy to read and write some guide rules.

Probably would want make sure you got a bug first and give more info before placing in a thread that is labeled as it is confirmed.

There are different hatch patterns types, and system variables, HPBOUND, HPASSOC, that could effect it.

Just looking at your selection method how do you know you even have an Hatch object?

[Kerry]

*List of bugs we find, and workarounds we try. For forum sticker, if there is a will to do it. Share and help others.

Selection problem
As an end user, use AutoCAD to:
1) Select 20 000-30 000 (same) objects with mouse at once
2) Deselect about half part of previous selection using mouse and holding SHIFT key.
3) Notice that one CPU core is now fully busy and stays busy forever.
4) Press ESC key and now CPU goes to 0% usage.
*observable on 2013, 2015

I am unable to reproduce this result at the command line with AutoCAD2014, AutoCAD2015.

Does it happen at the command-line for you or in your code ?

//---------------------
If you believe this behaviour is a 'bug', have you reported it to AutoDESK ??

[Jeff H]

I got it after a bit of messing with hatch until its edges could be used to calculate a border.

That's something to check and they have information in docs and of course pretty vague.

[sybold]

the selection problem is because of the propeties pallete being open i think

[nekitip]

Unexpected line in overrule
Sometimes when you use overrule, you need to override worlddraw

Code - vb.net: [Select]

1. Public Overrides Function WorldDraw(drawable As Drawable, wd As WorldDraw) As Boolean

Here you can find out everything that is moving, even if it is not in DB
like:

Code - vb.net: [Select]

1. Public Overrides Function WorldDraw(drawable As Drawable, wd As WorldDraw) As Boolean
2.                 If wd.IsDragging Then
3.                     Dim ent As Entity = DirectCast(drawable, Entity) 'filtering already for Entity
4.                        'do something
5.                 End If
6.                 Return MyBase.WorldDraw(drawable, wd)
7.             End Function

Expected behaviour is that whatever is dragging will pop up here.
However, prepare that sometimes unexpedted, nonexisting objects may appear.
For example, if user pastes text, (PASTECLIP), than an unknown polyline will appear here and trigger override and If-then test.

EDIT: also, this particular overrule is acting different in 32bit and 64bit, and different in autocad 2015 then in earlier versions

[nekitip]

Incorrect polyline Area value returned by .NET API
(EDIT: and some other curves, like SPLINE..., but circles, arcs seems OK, so... careful...)
To reproduce:
draw polyline in a form of number 8 in autocad, read entity Area property in .NET and returning value is wrong.
It is wrong for all self-intersecting polylines and some (hard to tell which) of the non closed ones.
Shrot solution:
read values from COM object

Code - C#: [Select]

1.             public static double GetArea(this Polyline pline)
2.            {
3.                dynamic pl = pline.AcadObject;
4.                return (double)pl.Area;
5.            }
6.  

Longer solution:
since reading com this way is about two times slower, doesn't work well in overrules, then you can read only if you are sure object is self-intersected or non closed (some non closed plines are good for read directly from .NET but hard to tell when. Please share if you know solution)

Also, I ask everyone to share your findings about other unexpected and undocumented bugs and behaviour.