DACTL.CPP

#include "dactl.h" 
 
void dump_com_error( _com_error &e ) 
{ 
    char buf[2048]; 
 
    sprintf(buf, _T( "Oops - hit an error!\n\tCode = %08lx\n\tCode meaning = %s\n" ), 
            e.Error(), e.ErrorMessage()); 
    OutputDebugString(buf); 
} 
 
// If this is placed in the scope of the smart pointers, they must be 
// explicitly Release(d) before CoUninitialize() is called.  If any reference 
// count is non-zero, a protection fault will occur. 
 
CDAViewerCtl::CDAViewerCtl() 
    :_vc(NULL) 
{ 
    try   { 
        _vc.CreateInstance(__uuidof(DAViewerControlWindowed)); 
    } catch( _com_error &e ) { 
        dump_com_error( e ); 
    } 
} 
 
void CDAViewerCtl::CreateModel() { 
    try { 
        // Create the statics object 
        IDAStaticsPtr e; 
        e = _vc->GetMeterLibrary(); 
 
        CDADrag* _dragPtr = new CDADrag(); 
 
        // Create a ModifiableBehavior which will be used to change the color 
        // of the square. 
        IDABehaviorPtr _squareColor = e->ModifiableBehavior(e->Red); 
 
        // Instanciate an uninitialized ColorBvr (_squareColor). 
        IDAColorPtr temp; 
        temp.CreateInstance( L"DirectAnimation.DAColor"); 
 
        // Initialize _squareColor.  Let it start out as red, change it to blue, 
        // when the square is grabbed, and return to red when the square 
        // is released.  The grab and release events are obtained from the 
        // getGrabEvent() and getReleaseEvent() from the CDADrag  
        // class. 
        //_squareColor->Init(e->Until(e->Red, _dragPtr->getGrabEvent(),  
        //  e->Until(e->Blue, _dragPtr->getReleaseEvent(), _squareColor))); 
 
        // Create cropped square, and apply _squareColor's color behavior to it.  
        _blockImg = e->SolidColorImage((IDAColorPtr)_squareColor)->Crop(e->Point2(0,0), 
          e->Point2(0.005,0.005)); 
     
        _dragPtr->initNotify(_blockImg, e->Origin2, e); 
 
        // Initialize squareClr.  Let it start out as red, change it to blue, 
        // when the cube is grabbed, and return to red when the cube 
        // is released.  The grab and release events are obtained from the 
    // getGrabEvent() and getReleaseEvent() methods of the CDADrag 
    // class respectively. 
        IDAColorPtr squareClr; 
        squareClr.CreateInstance( L"DirectAnimation.DAColor"); 
        squareClr->Init(e->Until(e->Red, _dragPtr->getGrabEvent(),  
    e->Until(e->Blue, _dragPtr->getReleaseEvent(), squareClr))); 
 
        // Apply squareClr's behavior to the square. 
        _squareColor->SwitchTo(squareClr); 
 
        // Get the ImageBvr part of grabImg, by calling the getImagePtr() method 
        // of DraggableImage. 
        IDAImagePtr pickableBlockImg = _dragPtr->getImagePtr(); 
 
        // overlay pickableBlockImg on a black background. 
        IDAImagePtr model = e->Overlay(pickableBlockImg, e->SolidColorImage(e->Black)); 
         
        // And set the model's image to this image. 
        _vc->PutImage( model ); 
 
        // Set the cap for the frame rate.  If we don't do this, DA 
        // will hog the cpu and the mouse and keyboard won't be very 
        // responsive.  If you're running in full screen mode, you may 
        // want to remove this line to get better frame rate. 
        _vc->put_UpdateInterval(0.2); 
 
        // Start the model on the view.  The WndProc will 
        // generate the frames. 
        _vc->Start(); 
 
    } catch( _com_error &e ) { 
        dump_com_error( e ); 
    } 
} 
 
 
HRESULT CDAViewerCtl::GetIUnknown(IUnknown **pUnk) { 
    if (!pUnk) 
        return E_POINTER; 
 
    if (_vc == NULL) 
        return E_NOINTERFACE; 
 
    return _vc->QueryInterface(IID_IUnknown, (LPVOID *)pUnk); 
}