C++ (Cpp) COMPtr::get_accName Examples

Example #1

File: AccessibilityControllerWin.cpp Project: Moondee/Artemis

static void CALLBACK logEventProc(HWINEVENTHOOK, DWORD event, HWND hwnd, LONG idObject, LONG idChild, DWORD, DWORD)
{
    // Get the accessible object for this event.
    COMPtr<IAccessible> parentObject;

    VARIANT vChild;
    VariantInit(&vChild);

    HRESULT hr = AccessibleObjectFromEvent(hwnd, idObject, idChild, &parentObject, &vChild);
    ASSERT(SUCCEEDED(hr));

    // Get the name of the focused element, and log it to stdout.
    BSTR nameBSTR;
    hr = parentObject->get_accName(vChild, &nameBSTR);
    ASSERT(SUCCEEDED(hr));
    wstring name(nameBSTR, ::SysStringLen(nameBSTR));
    SysFreeString(nameBSTR);

    switch (event) {
        case EVENT_OBJECT_FOCUS:
            printf("Received focus event for object '%S'.\n", name.c_str());
            break;

        case EVENT_OBJECT_SELECTION:
            printf("Received selection event for object '%S'.\n", name.c_str());
            break;

        case EVENT_OBJECT_VALUECHANGE: {
            BSTR valueBSTR;
            hr = parentObject->get_accValue(vChild, &valueBSTR);
            ASSERT(SUCCEEDED(hr));
            wstring value(valueBSTR, ::SysStringLen(valueBSTR));
            SysFreeString(valueBSTR);

            printf("Received value change event for object '%S', value '%S'.\n", name.c_str(), value.c_str());
            break;
        }

        case EVENT_SYSTEM_SCROLLINGSTART:
            printf("Received scrolling start event for object '%S'.\n", name.c_str());
            break;

        default:
            printf("Received unknown event for object '%S'.\n", name.c_str());
            break;
    }

    VariantClear(&vChild);
}