windows-server-2003/printscan/ui/wiadefui/apdropt.cpp

/*******************************************************************************
 *
 *  (C) COPYRIGHT MICROSOFT CORPORATION
 *
 *  TITLE:       APDROPT.CPP
 *
 *  VERSION:     1.0
 *
 *  AUTHOR:      ShaunIv
 *
 *  DATE:        5/22/2001
 *
 *  DESCRIPTION: Autoplay drop target
 *
 *******************************************************************************/
#include "precomp.h"
#pragma hdrstop
#include "apdropt.h"
#include "wiadefui.h"
#include "runwiz.h"


CWiaAutoPlayDropTarget::CWiaAutoPlayDropTarget()
: m_cRef(1)
{
    WIA_PUSHFUNCTION(TEXT("CWiaAutoPlayDropTarget::CWiaAutoPlayDropTarget"));
    DllAddRef();
}

CWiaAutoPlayDropTarget::~CWiaAutoPlayDropTarget()
{
    WIA_PUSHFUNCTION(TEXT("CWiaAutoPlayDropTarget::~CWiaAutoPlayDropTarget"));
    DllRelease();
}


STDMETHODIMP_(ULONG) CWiaAutoPlayDropTarget::AddRef()
{
    WIA_PUSHFUNCTION(TEXT("CWiaAutoPlayDropTarget::AddRef"));
    return InterlockedIncrement(&m_cRef);
}


STDMETHODIMP_(ULONG) CWiaAutoPlayDropTarget::Release()
{
    WIA_PUSHFUNCTION(TEXT("CWiaAutoPlayDropTarget::Release"));
    LONG nRefCount = InterlockedDecrement(&m_cRef);
    if (!nRefCount)
    {
        delete this;
    }
    return nRefCount;
}


HRESULT CWiaAutoPlayDropTarget::QueryInterface( REFIID riid, void **ppvObject )
{
    WIA_PUSHFUNCTION(TEXT("CWiaAutoPlayDropTarget::QueryInterface"));
    if (IsEqualIID( riid, IID_IUnknown ))
    {
        *ppvObject = static_cast<IDropTarget*>(this);
    }
    else if (IsEqualIID( riid, IID_IDropTarget ))
    {
        *ppvObject = static_cast<IDropTarget*>(this);
    }
    else
    {
        *ppvObject = NULL;
        return(E_NOINTERFACE);
    }
    reinterpret_cast<IUnknown*>(*ppvObject)->AddRef();
    return(S_OK);
}

HRESULT CWiaAutoPlayDropTarget::DragEnter(IDataObject *pDataObject, DWORD grfKeyState, POINTL ptl, DWORD *pdwEffect)
{
    *pdwEffect = DROPEFFECT_COPY;
    return S_OK;
}

HRESULT CWiaAutoPlayDropTarget::DragOver(DWORD grfKeyState, POINTL ptl, DWORD *pdwEffect)
{
    *pdwEffect = DROPEFFECT_COPY;
    return S_OK;
}

HRESULT CWiaAutoPlayDropTarget::DragLeave(void)
{
    return S_OK;
}

HRESULT GetPathFromDataObject( IDataObject *pDataObject, LPTSTR pszPath, UINT cchPath )
{
    FORMATETC fmte = { CF_HDROP, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
    STGMEDIUM medium = {0};

    HRESULT hr = pDataObject->GetData(&fmte, &medium);

    if (SUCCEEDED(hr))
    {
        if (DragQueryFile((HDROP)medium.hGlobal, 0, pszPath, cchPath))
            hr = S_OK;
        else
            hr = E_FAIL;

        ReleaseStgMedium(&medium);
    }

    return hr;
}

HRESULT CWiaAutoPlayDropTarget::Drop( IDataObject *pDataObject, DWORD grfKeyState, POINTL pt, DWORD *pdwEffect )
{
    WIA_PUSH_FUNCTION((TEXT("CWiaAutoPlayDropTarget::Drop")));
    //
    // Validate pointer arguments
    //
    if (!pDataObject || !pdwEffect)
    {
        return E_POINTER;
    }

    //
    // Get the path
    //
    WCHAR szPath[MAX_PATH] = {0};
    HRESULT hr = GetPathFromDataObject( pDataObject, szPath, ARRAYSIZE(szPath) );
    *pdwEffect = DROPEFFECT_COPY;
    if (SUCCEEDED(hr))
    {
        WIA_TRACE((TEXT("szPath: %ws"), szPath ));
        //
        // Make sure we have a string
        //
        if (lstrlen(szPath))
        {
            //
            // Create the device name, of the form {D:\\}, where D is the drive letter
            //
            WCHAR szDeviceID[MAX_PATH] = {0};
            wnsprintf( szDeviceID, ARRAYSIZE(szDeviceID), TEXT("{%ws}"), szPath );

            //
            // Run the wizard
            //
            hr = RunWiaWizard::RunWizard( szDeviceID );
        }
        else
        {
            hr = E_INVALIDARG;
        }
    }
    return hr;
}