Adding a sub-shape to selection in local context

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

Commenter-1

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 Commenter-2

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 ).

Commenter-3

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 Commenter-2

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

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

Commenter-3

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,

Commenter-3

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 << "NbSelected = " << nb_selected << endl;

// the output is 0

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

Commenter-1

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.

Commenter-3

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

Commenter-1

hI,
As Hightlight the object,my question is ,if I import a step file and parse the Face,Wire,Edge,Vertext and put them into a TreeCtrl,while I click the Item of TreeCtrl,the chosed object hightlight show by different color.
Do you have any suggestion?could you give me the C++ code to do it?
thanks
Commenter-4.Jiang