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Deselect Every Other Selected Object Example (C++ COM)

This example shows how to deselect every other object.


// -------------------------------------------------------------------

void APITestFunction()


    HRESULT                                 hr = S_OK;

    long                                    bRet = FALSE;

    long                                    nRetVal = -1;

    CComPtr <ISldWorks>                     pSldWorks;

    CComPtr <IModelDoc2>                    pModel;

    CComPtr <ISelectionMgr>                 pSelMgr;

    long*                                   nDeSelectArr = NULL;

    long                                    nDeSelectCount = -1;

    long                                    nOldSelCount = -1;

    long                                    nNewSelCount = -1;

    long                                    i = -1;

    // Connect to SolidWorks application

    pSldWorks = TheApplication->GetSWApp();


    hr = pSldWorks->get_IActiveDoc2(&pModel);


    hr = pModel->get_ISelectionManager(&pSelMgr);


    hr = pSelMgr->GetSelectedObjectCount(&nOldSelCount);

    ASSERT(nOldSelCount > 1);

    nDeSelectCount = floor(nOldSelCount / 2);

    nDeSelectArr = new long[nDeSelectCount];


    ZeroMemory(nDeSelectArr, nDeSelectCount * sizeof(long));

    for (i = 0; i < nDeSelectCount; i++)


        // Deselect every other item

        // Memory array is 0-based, but SelectionMgr array is 1-based

        nDeSelectArr[i] = 2 * i + 1;


    hr = pSelMgr->IDeSelect(nDeSelectCount, nDeSelectArr, &bRet);


    hr = pSelMgr->GetSelectedObjectCount(&nNewSelCount);

    ASSERT(nNewSelCount == nOldSelCount - nDeSelectCount);

    delete [] nDeSelectArr;


// -------------------------------------------------------------------



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