Adding and removing the entities from pick first selection set using ObjectARX

By Virupaksha Aithal

You can use “acedSSSetFirst” API to set the pick first (selection with grips) selection set. The code below is a code for sample command, which prompts for entity selection and places it to pick first selection set. Code also shows a WIN32 message box, once you press OK, the selection is removed from pick first selection set. Note, the command which selects the entity with grip should have command flags set as ACRX_CMD_USEPICKSET and ACRX_CMD_REDRAW

void selectTest()

{

    int nReturn ;

    ads_name name;

    ads_point pt;

 

    nReturn = acedEntSel(_T("Select entity\n"), name, pt);

 

    if(nReturn != RTNORM)

     return;

    //get the object Id of the entity

    AcDbObjectId Id;

    if(acdbGetObjectId(Id, name) != Acad::eOk)

     return;

 

    //from object id to selection set

    ads_name ss, ename;

 

    //create a selection set

    acedSSAdd( NULL, NULL, ss );

 

    //get the ads name from objectID

    acdbGetAdsName( ename, Id );

 

    //add the selected entity ads name to selection set

    acedSSAdd( ename, ss, ss );

 

    //select with grip

    acedSSSetFirst( ss, NULL );

 

    acedSSFree( ss );

 

    ::MessageBox(NULL, L"Selected", L"AutoCAD", MB_OK);

    //cancel the selection

    acedSSSetFirst( NULL, NULL );

}