Disabling DROPGEOM

[Kyudos]

EDIT: For convenience I'm just adding the latest builds to this first post 🙂

********

I've found that dealing with OLEDRAGDROP / DROPGEOM as well as grip editing makes the handling for my custom objects unnecessarily complicated.

Hence I'm posting my solution to disabling this function for my objects, I don't know if its the best way, but it works.

In your AcApDocManagerReactor::documentLockModeChanged handler you can use something like this:

if (_tcsicmp(pGlobalCmdName, _T("OLEDRAGDROP")) == 0 || 
_tcsicmp(pGlobalCmdName, _T("DROPGEOM")) == 0 ||
_tcsicmp(pGlobalCmdName, _T("DRAGENTER")) == 0)
{
    // Prevent objects from being dragged
    for (int i = 0; i < aLastSelectionArray.length(); i++)
    {
        AcDbObjectId objId = aLastSelectionArray[i];
	MyObject* pObj = IsMyObject(objId);

        if (pObj != NULL)
        {
            this->veto();
            break;
        }
    }
}

[Kyudos]

The above is a solution I found 🙂

[Anonymous]

Thanks for tackling this obnoxious problem! I'm a newbie at digging into the guts of AutoCAD, so could you spell out how to implement this? Explain-it-like-I'm-five style.

[Alexander.Rivilis]

This solution disable command if in current selection set is at least one MyObject entity. It will be cool to filter MyObject entities and start continue command without them. IMHO

[Kyudos]

I've attached a sample project to demonstrate this - I've only tested it on AutoCAD 2016 x64 though.

The above sample only prevents dragging and dropping of my custom objects, the sample project just globally disables it.

Two simple commands:

DISABLEDD

ENABLEDD

[troma]

I downloaded your zip.
I have no idea what to do with it next.

[Kyudos]

Well, if you aren't interested in how the code works, you can (if you have AutoCAD 2016) simply load up one of the included ARX files and use the commands to enable or disable drag and drop as you like.

[Kyudos]

Actually - this doesn't work as well as I hoped.

It prevents DROPGEOM - so your entities will snap back to their starting positions.

In BricsCAD it prevents the Drag from being initiated in the first place - that would be better, but those commands don't come through in AutoCAD.

[Anonymous]

I loaded the ARX file and it worked well for me! However, is there a way to have it default run "Disabledd" on startup?

I don't have the right program to open the arx files--was hoping I could open and edit it in notepad like a lisp, but nope.

[Kyudos]

You can add commands to:

"C:\Program Files\Autodesk\AutoCAD 2016\Support\acad2016.lsp"

to run them on startup. Obviously the ARX would need to be loaded first - but you could add the load command in the same file.

[Kyudos]

It seems a better option to disable drag-and-drop for a custom entity is something like this:

//----------------------------------------------------
void MyObject::dragStatus(const AcDb::DragStat status)
//----------------------------------------------------
{
  if (status == AcDb::kDragStart)
  {
    if (m_pDropTarget == NULL)
    {
      m_pDropTarget = new MyDropTarget;
      acedStartOverrideDropTarget(m_pDropTarget);
    }
  }
  else if (status == AcDb::kDragEnd)
  {
    if (m_pDropTarget != NULL)
    {
      acedEndOverrideDropTarget(m_pDropTarget);
      delete m_pDropTarget;
      m_pDropTarget = NULL;
    }
  }
}

Here MyDropTarget is derived from COleDropTarget and just disables dragging and dropping for the duration of the "drag".

Refer to this: Override drag-drop behavior

Also note - you'll need to add _ARX_CUSTOM_DRAG_N_DROP_ to your pre-processor definitions if you want to use this method.

[Anonymous]

I added the ARX file to my lsp startup suite, but I want it to run as though the "Disabledd" command has already been entered on startup, without having to actually enter it with each new session. If this were a standard lisp, I think I could just add a line of text in the code. I don't know how to edit ARX files to achieve the same effect.

Are you suggesting that I write a separate lisp that just runs the "Disabledd" command on startup? I don't mind doing that, just clarifying and ensuring that's the best way.

Edit: sorry, read up a little more on the method you mentioned and realize exactly what to do. Thanks!

[gennadykhSSDP9]

Thank you very much for the sample solution.

It works fine in one session. I can prevent to run such operation in current drawing.

I'm wonder if it is possible to prevent drag-and-drop operation from one autocad session with loaded ARX to another acad without it.

Thank you,

Gennady

[Kyudos]

Hi Gennady,

My first solution (the sample ARX) vetoes DROPGEOM - meaning that you can drag, but you can't drop.

My second (better) solution (not in the sample ARX) uses an override of the drop target to prevent the drag from even starting.

I imagine (not tested) that this method would prevent entities being dragged-and-dropped between ACAD instances.

Dan

[gennadykhSSDP9]

Dan,

i did try your second solution. I like it better so drag-n-drop will be limited to custom components.

For some reason drag operation never finished in dragStatus with AcDb::kDragEnd.

It came via OnDropEx because it creates rectangle and OnDrop returns FALSE.

My custom component live in DBX, both ARX and DBX projects have _ARX_CUSTOM_DRAG_N_DROP_ predefined macro.

Do you know if somethin is missing?

Thank you,

Gennady

[Kyudos]

Looking at my code I may have found some similar problem , since I actually have:

if (status == AcDb::kDragStart)
{
    ...
}
else
{
    ...
}

I'm never checking specifically for kDragEnd (remember you might get kDragAbort too).

[gennadykhSSDP9]

actually i'm tracking all three options:

AcDb::kDragStart: to create CMyDropTarget object;

AcDb::kDragEnd: to delete CMyDropTarget object;

AcDb::kDragAbort: to delete CMyDropTarget object;

Never got to End or Abort options.

Did make CMyDropTarget global, did CoCreateInstance() in ctor, did register in OnDragEnter. Nothing helps.

I see following events sequence:

"Component dtor"

"drag started"

Looks like starting drag-and-drop will delete component from current drawing to clipping board and after that component is not belonging to Acad session anymore. Just a guess.

[Anonymous]

The arx file won't load in 2017. Would you be able to post one for 2017 version? Thanks!

[ArchD]

I'd also like to load this arx in 2017. Any way to update this? I've opened it in VS but can't figure it out. So bad at coding...

[Anonymous]

Hi @Kyudos,

Kia Ora from New Zealand- I hope you are well in these crazy times..

I am constantly working with large drawings in Civil 3d 2020. Lag is a constant battle with large datasets and the DROPGEOM command is alive and well, providing me with ample frustration, usually only a long time after it's happened (although thankfully sometimes I see it happen and can undo right away). And it's not just me, it happens to my work mates too.

I have stumbled across your solution as the closest thing to fixing this, however trying to load your ARX file from this download into Civil 3D 2020 gives me this error message:

disabledragdrop.arx is incompatible with this version of AutoCAD.
AcRxDynamicLinker failed to load 'k:\autocad\autocad\lisp\disabledragdrop.arx'
k:\autocad\autocad\lisp\disabledragdrop.arxUnable to load DisableDragDrop.arx file.

I don't want to be this guy, usually i'll trawl the internet until I break down what I need and managed to bungle my way through it, but not this time. I seem to be hitting wall after wall.

Is there some way you could assist me in getting this to run in my version of AutoCAD?  It would be hugely appreciated.

Kind Regards,

Tom