STDMETHODIMP QOleDataObject::QueryGetData( FORMATETC *pformatetc )
{
#ifdef DEBUG_QDND_SRC
qDebug( "QOleDataObject::QueryGetData( %p )", pformatetc );
#endif
if ( !pformatetc ) {
return E_INVALIDARG;
}
if ( pformatetc->lindex != -1 ) {
return DV_E_LINDEX;
}
if ( pformatetc->dwAspect != DVASPECT_CONTENT ) {
return DV_E_DVASPECT;
}
int tymed = pformatetc->tymed;
/* Currently we only support HGLOBAL */
if ( !( tymed & TYMED_HGLOBAL ) ) {
return DV_E_TYMED;
}
int cf = pformatetc->cfFormat;
QPtrList<QWindowsMime> all = QWindowsMime::all();
for ( QWindowsMime * c = all.first(); c ; c = all.next() ) {
const char * mime = c->mimeFor( cf );
if ( mime && m_dragObj->provides( mime ) ) {
return S_OK;
}
}
return DV_E_FORMATETC;
}
STDMETHODIMP QOleDataObject::GetData( FORMATETC *pformatetcIn, STGMEDIUM *pmedium )
{
// is data is in our format?
HRESULT hr = QueryGetData( pformatetcIn );
if ( hr != S_OK )
return hr;
int cf = pformatetcIn->cfFormat;
pmedium->tymed = TYMED_HGLOBAL;
QPtrList<QWindowsMime> all = QWindowsMime::all();
for ( QWindowsMime * c = all.first(); c ; c = all.next() ) {
const char * mime = c->mimeFor( cf );
if ( mime && m_dragObj->provides( mime ) ) {
QByteArray ba = m_dragObj->encodedData( mime );
ba = c->convertFromMime( ba, mime, cf );
HGLOBAL hGlobal = GlobalAlloc ( GMEM_MOVEABLE | GMEM_SHARE, ba.size() );
if ( !hGlobal )
return E_OUTOFMEMORY;
memcpy ( GlobalLock ( hGlobal ), ba.data(), ba.size() );
GlobalUnlock ( hGlobal );
pmedium->hGlobal = hGlobal;
pmedium->pUnkForRelease = NULL;
return S_OK;
}
}
return E_UNEXPECTED;
}
STDMETHODIMP QOleDataObject::GetDataHere( FORMATETC *pformatetc, STGMEDIUM *pmedium )
{
// is data is in our format?
HRESULT hr = QueryGetData( pformatetc );
if ( hr != S_OK )
return hr;
if ( pmedium->tymed != TYMED_HGLOBAL )
return DV_E_TYMED;
if ( !pmedium->hGlobal )
return STG_E_MEDIUMFULL;
HGLOBAL hGlobal = pmedium->hGlobal;
uint size = GlobalSize( hGlobal );
int cf = pformatetc->cfFormat;
QPtrList<QWindowsMime> all = QWindowsMime::all();
for ( QWindowsMime * c = all.first(); c ; c = all.next() ) {
const char * mime = c->mimeFor( cf );
if ( mime && m_dragObj->provides( mime ) ) {
QByteArray ba = m_dragObj->encodedData( mime );
if ( ba.size() > size )
return STG_E_MEDIUMFULL;
memcpy ( GlobalLock ( hGlobal ), ba.data(), ba.size() );
GlobalUnlock ( hGlobal );
return S_OK;
}
}
return E_UNEXPECTED;
}
static QByteArray qt_xdnd_obtain_data( const char * format )
{
QByteArray result;
QWidget* w;
if ( qt_xdnd_dragsource_xid && qt_xdnd_source_object &&
(w=QWidget::find( qt_xdnd_dragsource_xid ))
&& (!w->isDesktop() || w->acceptDrops()) )
{
QDragObject * o = qt_xdnd_source_object;
if ( o->provides( format ) )
result = o->encodedData(format);
return result;
}
Atom * a = qt_xdnd_str_to_atom( format );
if ( !a || !*a )
return result;
if ( !qt_xdnd_target_data )
qt_xdnd_target_data = new QIntDict<QByteArray>( 17 );
if ( qt_xdnd_target_data->find( (int)*a ) ) {
result = *(qt_xdnd_target_data->find( (int)*a ));
} else {
if ( XGetSelectionOwner( qt_xdisplay(),
qt_xdnd_selection ) == None )
return result; // should never happen?
QWidget* tw = qt_xdnd_current_widget;
if ( !tw || qt_xdnd_current_widget->isDesktop() ) {
tw = new QWidget;
}
XConvertSelection( qt_xdisplay(),
qt_xdnd_selection, *a,
qt_xdnd_selection,
tw->winId(), CurrentTime );
XFlush( qt_xdisplay() );
XEvent xevent;
bool got=qt_xclb_wait_for_event( qt_xdisplay(),
tw->winId(),
SelectionNotify, &xevent, 5000);
if ( got ) {
Atom type;
if ( qt_xclb_read_property( qt_xdisplay(),
tw->winId(),
qt_xdnd_selection, TRUE,
&result, 0, &type, 0, FALSE ) ) {
if ( type == qt_incr_atom ) {
int nbytes = result.size() >= 4 ? *((int*)result.data()) : 0;
result = qt_xclb_read_incremental_property( qt_xdisplay(),
tw->winId(),
qt_xdnd_selection,
nbytes, FALSE );
} else if ( type != *a ) {
// (includes None) debug( "Qt clipboard: unknown atom %ld", type);
}
if ( type != None )
qt_xdnd_target_data->insert( (int)((long)a), new QByteArray(result) );
}
}
if ( !qt_xdnd_current_widget || qt_xdnd_current_widget->isDesktop() ) {
delete tw;
}
}
return result;
}