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Adding a sub-shape to selection in local context

Anonymous's picture
Forums: 

Hello,

I have an AIS_InteractiveContext. In this context , I have an AIS_Shape.

I open a local context in face selection mode.

I want in c++ add a face from my object to the current selected list.

How to do that ? I have seen the function :

AIS_InteractiveContext::AddOrRemoveSelected ( me:mutable ; aShape:Shape from TopoDS ; updateviewer : Boolean from Standard=Standard_True);

---Purpose: No right to Add a selected Shape (Internal Management of shape Selection).

-- A Previous selected shape may only be removed.

This function seems to be what I need , but we have no right to use it for Add , just for remove ( but why the name AddOrRemove if we cannot use add `? :-) ).

As somebody an idea ?

Thanks,

Stephane

Sergey RUIN's picture

Hi Stephane!

No right to Add a selected shape means that you can't add a previously selected shape, but if it hasn't yet been selected you can add that shape to the selection list.

Best regards

Sergey

Michael Gandyra's picture

Hello Stephane and Sergey, I just want to provide an example of how to use it. The following code will toggle all displayed objects in the AISContext:

void GUIF_CCVDocument::SelectToggle()

{

AIS_ListOfInteractive Obj_List;

myAISContext->DisplayedObjects(Obj_List);

// create listiterator

AIS_ListIteratorOfListOfInteractive it;

// iterate through all objects

for (it.Initialize(Obj_List); it.More(); it.Next())

{

if (!myAISContext->IsInCollector(it.Value()))

{

if (it.Value()->Type() != AIS_KOI_Datum)

{

if (!myAISContext->HasOpenedContext())

// AISContext is at neutral point

myAISContext->AddOrRemoveCurrentObject(it.Value(),Standard _False);

else

// AISContext has an opened Local Context

myAISContext->AddOrRemoveSelected(it.Value(),Standard_Fals e);

}

}

}

myAISContext->UpdateCurrentViewer();

}

with regards Michael

Stephane Routelous's picture

Hello Michael ,

Thanks, but it is not exactly whant I want. I don't want to work with the AIS_InteractiveObjects from the neutral plane ( without local context ) , but with the sub-shapes of an AIS_Shape ( see my other mail for an example ).

Stephane

Michael Gandyra's picture

It is exactly the same except that you use AddOrRemoveCurrentObject in neutral point and AddOrRemoveSelected for local context. It is divided through if ... then in my last example.

best regards Michael

PS: In your code sample: do you see selection of face1 and face2 on the screen ?

Stephane Routelous's picture

No , I don't see anything selected... That is where is my problem ..

Stephane

Stephane Routelous's picture

Hi Sergey,

Thanks for the response. I've tried the function in a test programm ( I'm using NT ( visualC++ ) with Cascade 2.1 )

It seems not to work. If you can see what's wrong with my code...

Thanks,

Stephane

TopoDS_Shape aBox = BRepAPI_MakeBox(1,1,1);

Handle_AIS_Shape anAISBox = new AIS_Shape(aBox);

anAISBox->SetDisplayMode(AIS_WireFrame);

myAISContext->Display(anAISBox);

myAISContext->OpenLocalContext();

myAISContext->ActivateStandardMode(TopAbs_FACE);

TopExp_Explorer Exp;

Exp.Init(aBox,TopAbs_FACE);

TopoDS_Face theFace1;

TopoDS_Face theFace2;

if ( Exp.More() )

{

theFace1 = TopoDS::Face(Exp.Current());

Exp.Next();

if ( Exp.More() )

{

theFace2 = TopoDS::Face(Exp.Current());

}

}

if ( !theFace1.IsNull() )

{

myAISContext->AddOrRemoveSelected(theFace1);

}

if ( !theFace2.IsNull() )

{

myAISContext->AddOrRemoveSelected(theFace2);

}

myAISContext->InitSelected();

int nb_selected = myAISContext->NbSelected();

cout

// the output is 0

Sergey RUIN's picture

Hi Stephane!

I'm afraid that I was wrong with AddOrRemoveSelected method, nevertheless I can propose two ways to add a shape to the list of selected shapes.

1. Handle(StdSelect_BRepOwner) BO = new StdSelect_BRepOwner(shape,aisIO, 0, true);

// Where "shape" is shape to be selected, "aisIO" is AIS_InteractiveObject from

// which "shape" was decomposed.

Handle(AIS_Selection) sel = AIS_Selection::CurrentSelection();

sel->Select(BO); // Puts "shape" to the list of selected shapes

myAISContext->HilightSelected(Standard_True);

// Hilighting selected shapes

2. As there is LocalContext open you can create

a temporary AIS_Shape object from TopoDS_Shape

Handle(AIS_Shape) aisShape=new AIS_Shape(shape);

Handle(AIS_TypeFilter) TF=new AIS_TypeFilter(

AIS_KOI_Shape);

if( !ctx->IsSelected(TF) ) {

ctx->AddFilter(TF); // To allow aisShape be selected

ctx->SetSelected(aisShape);

ctx->RemoveFilter(TF);

}

ctx->Hilight(aisShape);

Best regards

Sergey

Stephane Routelous's picture

Hi Sergey,

Thanks for your help.

I used the first solution , and it's working fine. BTW, I thought about the second solution ( it is more or less what I'm using in neutral point ), but I thought it's a pity to create a new AIS_Shape for that, because the information is already somewhere.

Stephane

Sergey RUIN's picture

Hi Stephane!

If you want you can trade space for speed while making selected TopoDS_Shape.

You can retrieve CurrentSelection from AIS_InteractiveObject (IO), that IO has to be activated in the desired standard selection mode, to have SelectMgr_Selection (S) available. Then, iterating that S you can get SelectBasics_SensitiveEntity from them with method Owner() it's possible to retrieve StdSelect_BRepOwner's (BO) and find, using method Shape of BO, which one contains TopoDS_Shape you want to select.

As use BO to get the TopoDS_Shape selected I wrote in the previous letter. That's all.

Best regards

Sergey